CN105649593A - Method for maintaining flow guiding capability of multi-fracture fracturing seam in horizontal well section - Google Patents
Method for maintaining flow guiding capability of multi-fracture fracturing seam in horizontal well section Download PDFInfo
- Publication number
- CN105649593A CN105649593A CN201511015216.6A CN201511015216A CN105649593A CN 105649593 A CN105649593 A CN 105649593A CN 201511015216 A CN201511015216 A CN 201511015216A CN 105649593 A CN105649593 A CN 105649593A
- Authority
- CN
- China
- Prior art keywords
- agent
- blocking agent
- model
- temporary blocking
- particle diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 41
- 239000012224 working solution Substances 0.000 claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000002981 blocking agent Substances 0.000 claims description 96
- 239000002245 particle Substances 0.000 claims description 67
- 238000007789 sealing Methods 0.000 claims description 28
- 244000007835 Cyamopsis tetragonoloba Species 0.000 claims description 21
- 239000000654 additive Substances 0.000 claims description 21
- 230000000996 additive effect Effects 0.000 claims description 21
- 230000000844 anti-bacterial effect Effects 0.000 claims description 21
- 239000004927 clay Substances 0.000 claims description 21
- 239000004088 foaming agent Substances 0.000 claims description 21
- -1 hydroxypropyl Chemical group 0.000 claims description 21
- 239000003381 stabilizer Substances 0.000 claims description 21
- 239000002562 thickening agent Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 12
- 101000766118 Haloarcula sp. (strain arg-2 / Andes heights) Cruxrhodopsin-2 Proteins 0.000 claims description 9
- 239000009096 changqing Substances 0.000 claims description 9
- 125000003636 chemical group Chemical group 0.000 claims description 9
- IMBXRZKCLVBLBH-OGYJWPHRSA-N cvp protocol Chemical compound ClCCN(CCCl)P1(=O)NCCCO1.O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1.C([C@H](C[C@]1(C(=O)OC)C=2C(=C3C([C@]45[C@H]([C@@]([C@H](OC(C)=O)[C@]6(CC)C=CCN([C@H]56)CC4)(O)C(=O)OC)N3C=O)=CC=2)OC)C[C@@](C2)(O)CC)N2CCC2=C1NC1=CC=CC=C21 IMBXRZKCLVBLBH-OGYJWPHRSA-N 0.000 claims description 9
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 8
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 238000001802 infusion Methods 0.000 claims description 7
- 238000004026 adhesive bonding Methods 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 4
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 4
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 239000003094 microcapsule Substances 0.000 claims description 4
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 4
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 12
- 230000009466 transformation Effects 0.000 description 10
- 208000010392 Bone Fractures Diseases 0.000 description 6
- 206010017076 Fracture Diseases 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006557 surface reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 210000002569 neuron Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Material Composition (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a method for keeping the flow conductivity of a multi-fracture fracturing fracture opening in a horizontal well section, which comprises the following steps of firstly preparing temporary plugging steering working fluid, wherein the temporary plugging steering working fluid comprises a degradable temporary plugging agent, degradable fibers, an isopycnic proppant and low-viscosity carrier fluid; performing segmented fracturing, wherein the sequence of pumping is front liquid → sand carrying liquid → temporary plugging steering working liquid; after all fracturing is finished, the temporary plugging steering working fluid is degraded and drained, and the propping agent is left at the crack opening to form a seepage channel. The method improves plugging efficiency and reduces the leakage of liquid between seams by adopting the multi-scale degradable temporary plugging agent, after construction is finished, the degradable temporary plugging agent and the degradable fibers in the temporary plugging steering working solution are completely degraded under the action of the bottom temperature, and the propping agent keeps the flow guiding capacity of a near shaft, can be used for conventional hydraulic fracturing segmental reconstruction and unconventional segmental fracturing reconstruction, is suitable for reconstruction of unpressurized perforating clusters of a new well and repeated fracturing reconstruction of an old well, and is suitable for various processes of horizontal well segmental reconstruction.
Description
Technical field
The present invention relates to low permeability gas reservoir horizontal well in segments transformation field, be specifically related to a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section.
Background technology
Soviet Union's Sulige gas field is typical DAMAGE OF TIGHT SAND GAS RESERVOIRS, and reservoir Lateral heterogeneity is strong, and longitudinally many phases are stacked, and horizontal well track penetrates multiple sand body. stifled multiple crack fracturing technique is a kind of technology realizing the transformation of horizontal well multistage temporarily, overcomes the anisotropism of reservoir, improves to greatest extent and makes seam bar number. stifled multiple crack fracturing technology is in work progress temporarily, in stratum, in time add appropriate diverting agent, follow the principle to resistance minimum direction flowing, diverting agent enters primary fracture or high permeability zone with fracturing fluid, under differential pressure action, assemble and produce the filter cake bridge blinding of high intensity, make follow-up fracturing fluid can not enter this crack and high permeability zone, simultaneously, certain level two to stress difference when, make new crack that pressure break produces along from before the different orientation crack initiation of man-made fracture and extension, thus setting up new oil and gas flow passage and changing oil-gas Layer fluid neuron network displacement rule, to improve the correctional effect of low permeability reservoir.
The weak point of current crack stifled multiple crack fracturing technique and diverting agent temporarily mainly has:
1, the diverting agent of existing stifled turnaround fracture temporarily is to add inside prepad fluid, is block the remote cracky transformation of well end.
2, uniform particle sizes's plugging effect of existing diverting agent is bad.
3, existing diverting agent is directly added inside fracturing fluid, by oil pipe in the course of conveying of stratum, it is easy to dispersion, plugging effect is bad.
4, existing multistage fracturing technology is usually present some well sections and can not get effective transformation.
Summary of the invention
It is an object of the invention to overcome problems of the prior art, it is provided that a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, comprise the following steps:
1) first determine that temporary stall is to working solution, temporary stall includes to working solution: by volume percentages, 8.5% Degradable temporary blocking agent, 8.5% proppant, 8.5%-17% biodegradable fiber and low the gluing of 66%-74.5% carry liquid, Young's modulus according to different gas fields reservoir determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all by big particle diameter Degradable temporary blocking agent, when Young's modulus is when 25000-30000MPa, little particle diameter Degradable temporary blocking agent accounts for 70%, big particle diameter Degradable temporary blocking agent accounts for 30%, when Young's modulus is more than 30000MPa, little particle diameter Degradable temporary blocking agent accounts for 30%, big particle diameter Degradable temporary blocking agent accounts for 70%,
2) staged fracturing is carried out, infusion order be prepad fluid �� load fluid �� temporary stall to working solution, prepad fluid, load fluid ratio be 1:1, temporary stall is 30-40 side/section to working solution, big particle diameter Degradable temporary blocking agent is cut gets lodged in crack port, and little particle diameter Degradable temporary blocking agent is filled between big particle diameter Degradable temporary blocking agent;
3) after all pressure break completes, treating that temporary stall is degraded to working solution, discharge opeing, crack interruption-forming seepage channel stayed by proppant.
Above-mentioned Degradable temporary blocking agent particle size range is 0.1-10mm, and little particle diameter Degradable temporary blocking agent particle size range is 0.1-1mm, and big particle diameter Degradable temporary blocking agent particle size range is 1-10mm.
Above-mentioned biodegradable fiber diameter is 10 ��m, and length is 5-10mm, and molecular weight is 50,000-250 ten thousand, and described proppant is the haydite of 20/40 order, 40/70 order or 70/140 order, and the density of proppant is identical with Degradable temporary blocking agent.
The preparation method of above-mentioned Degradable temporary blocking agent is: at ambient temperature, by guanidine glue, aluminium sesquioxide, magnesium oxide, Ammonium persulfate. microcapsule degelling agent, sodium polyacrylate bead, sodium bicarbonate are according to the mass ratio mix homogeneously of 48:107:193:11��42:24:1.26, then mixture is slowly added in water under agitation, the mass ratio of mixture and water is (26��28): (72��74), can obtain this Degradable temporary blocking agent after stirring 5 minutes.
Above-mentioned low viscous carry liquid and include: by mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer and 98.08% water.
Above-mentioned prepad fluid includes: by mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent and 97.98% water.
Above-mentioned load fluid includes: by mass percentage, 0.40% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent, 0.5% cross-linking agent and 97.38% water.
Above-mentioned hydroxypropyl guar thickening agent model is CJ2-6, and cleanup additive model is TGF-1, and antibacterial model is CJSJ-3, and foaming agent model is YFP-2, and clay stabilizer model is COP-2, and all can buy in Changqing oilfields Chemical Group company limited.
Above-mentioned hydroxypropyl guar thickening agent model is CJ2-6, and cleanup additive model is TGF-1, and antibacterial model is CJSJ-3, foaming agent model is YFP-2, clay stabilizer model is COP-2, and temperature stability agent model is TA-1, and all can buy in Changqing oilfields Chemical Group company limited.
Above-mentioned hydroxypropyl guar thickening agent model is CJ2-6, cleanup additive model is TGF-1, antibacterial model is CJSJ-3, foaming agent model is YFP-2, clay stabilizer model is COP-2, temperature stability agent model is TA-1, and cross-linking agent model is JL-1, and all can buy in Changqing oilfields Chemical Group company limited.
The technical scheme is that to provide and a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section,
Beneficial effects of the present invention:
(1) method of the multiple crack fracturing sealing flow conductivity crane span structure criterion according to Gruesbeck in this maintenance net horizontal section of the present invention, the volume fraction of Degradable temporary blocking agent and proppant is not less than 17%, contributes to quickly being formed near wellbore zone blocking up temporarily.
(2) the Degradable temporary blocking agent that in this maintenance net horizontal section of the present invention, the method for multiple crack fracturing sealing flow conductivity adopts is mixed according to a certain percentage by multiple dimensioned (particle diameter 0.1-10mm) stifled granule temporarily, the big particle diameter Degradable temporary blocking agent of 1-10mm is cut gets lodged in crack port, the little particle diameter of 0.1-1mm is filled between big particle diameter Degradable temporary blocking agent, effectively quickly improving plugging effect, mixed proportion is determined according to different gas field reservoir characteristic optimizations.
(3) in this maintenance net horizontal section of the present invention, the method for multiple crack fracturing sealing flow conductivity is passed through to add biodegradable fiber, temporary stall is played to the Degradable temporary blocking agent in working solution and proppant the effect of auxiliary migration, improve temporary stall to working solution stability from ground to shaft bottom, also improve the laid effect of proppant simultaneously, improve stifled success rate temporarily further.
(4) in this maintenance net horizontal section of the present invention, the method pressure break of multiple crack fracturing sealing flow conductivity terminates rear hydraulic fracture sealing and has Degradable temporary blocking agent, biodegradable fiber and proppant, proppant remains the flow conductivity of nearly pit shaft, reduce the risk that near wellbore zone is blocked, remain the seepage channel of gas reservoir and pit shaft. Degradable temporary blocking agent and biodegradable fiber are degradable under the effect of bottom hole temperature (BHT), without residue, do not produce to pollute to stratum. Degradation mechanism is body solution, and non-surface reaction, degradation time is unrelated with size.
(5) in this maintenance net horizontal section of the present invention, the method for multiple crack fracturing sealing flow conductivity can be used for conventional hydraulic pressure break segmentation transformation and the transformation of unconventional staged fracturing, do not press off perforation bunch transformation suitable in new well and the refracturing of old well is transformed, it is adaptable to the various techniques that horizontal well in segments is transformed.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail:
Embodiment 1:
In order to overcome problems of the prior art, the present embodiment provides a kind of and keeps the method for multiple crack fracturing sealing flow conductivity in net horizontal section, comprises the following steps:
1) first determine that temporary stall is to working solution, temporary stall includes to working solution: by volume percentages, 8.5% Degradable temporary blocking agent, 8.5% proppant, 8.5%-17% biodegradable fiber and low the gluing of 66%-74.5% carry liquid, Young's modulus according to different gas fields reservoir determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all by big particle diameter Degradable temporary blocking agent, when Young's modulus is when 25000-30000MPa, little particle diameter Degradable temporary blocking agent accounts for 70%, big particle diameter Degradable temporary blocking agent accounts for 30%, when Young's modulus is more than 30000MPa, little particle diameter Degradable temporary blocking agent accounts for 30%, big particle diameter Degradable temporary blocking agent accounts for 70%,
2) staged fracturing is carried out, infusion order be prepad fluid �� load fluid �� temporary stall to working solution, prepad fluid, load fluid ratio be 1:1, temporary stall is 30-40 side/section to working solution, big particle diameter Degradable temporary blocking agent is cut gets lodged in crack port, and little particle diameter Degradable temporary blocking agent is filled between big particle diameter Degradable temporary blocking agent;
3) after all pressure break completes, treating that temporary stall is degraded to working solution, discharge opeing, crack interruption-forming seepage channel stayed by proppant.
The method of multiple crack fracturing sealing flow conductivity in this maintenance net horizontal section of the present invention, the Degradable temporary blocking agent adopting Multiscale combination mixes according to a certain percentage, big particle diameter Degradable temporary blocking agent is cut gets lodged in crack port, less particle diameter is filled between big particle diameter Degradable temporary blocking agent, effectively quickly improving plugging effect, mixed proportion is determined according to different gas field reservoir characteristic optimizations; Crane span structure criterion according to Gruesbeck, the volume fraction of Degradable temporary blocking agent and proppant is not less than 17%, contributes to quickly being formed near wellbore zone blocking up temporarily.
Temporary stall is played, to the Degradable temporary blocking agent in working solution and proppant, the effect that auxiliary is migrated by adding of biodegradable fiber of the present invention, improve temporary stall to working solution stability from ground to shaft bottom, also improve the laid effect of proppant simultaneously, improve stifled success rate temporarily further.Pressure break terminates rear hydraulic fracture sealing Degradable temporary blocking agent, biodegradable fiber and proppant, and proppant remains the flow conductivity of nearly pit shaft, reduces the risk that near wellbore zone is blocked, remains the seepage channel of gas reservoir and pit shaft. Degradable temporary blocking agent and biodegradable fiber are degradable under the effect of bottom hole temperature (BHT), without residue, do not produce to pollute to stratum. Degradation mechanism is body solution, and non-surface reaction, degradation time is unrelated with size. The present invention can be used for conventional hydraulic pressure break segmentation transformation and the transformation of unconventional staged fracturing, it is adaptable to new well does not press off the refracturing of perforation bunch transformation and old well and transforms, it is adaptable to the various techniques that horizontal well in segments is transformed.
Embodiment 2:
On the basis of embodiment 1, present embodiments provide and a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, described Degradable temporary blocking agent particle size range is 0.1-10mm, little particle diameter Degradable temporary blocking agent particle size range is 0.1-1mm, and big particle diameter Degradable temporary blocking agent particle size range is 1-10mm. Degradable temporary blocking agent is mixed according to a certain percentage by multiple dimensioned (particle diameter 0.1-10mm) stifled granule temporarily, the big particle diameter Degradable temporary blocking agent of 1-10mm is cut gets lodged in crack port, the little particle diameter of 0.1-1mm is filled between big particle diameter Degradable temporary blocking agent, effectively quickly improving plugging effect, mixed proportion is determined according to different gas field reservoir characteristic optimizations.
Further, described biodegradable fiber diameter is 10 ��m, and length is 5-10mm, and molecular weight is 50,000-250 ten thousand, and described proppant is the haydite of 20/40 order, 40/70 order or 70/140 order, and the density of proppant is identical with Degradable temporary blocking agent.
Adding biodegradable fiber, biodegradable fiber is distributed to and carries formation network structure in liquid, improves Degradable temporary blocking agent in carrying liquid from well head to the stability entered before stratum, improves closure success rate; Proppant is the low-density ceramsite that Jingang Mew Material Co., Ltd. produces, the main haydite selecting 20/40 order, 40/70 order or 70/140 order, realize pressure break to terminate rear hydraulic fracture sealing and have Degradable temporary blocking agent and proppant, after the degraded of Degradable temporary blocking agent, proppant remains the flow conductivity of nearly pit shaft, reduce the risk that near wellbore zone is blocked, remain the seepage channel of gas reservoir and pit shaft.
Embodiment 3:
Present embodiments provide and a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, comprise the following steps:
1) first determine that temporary stall is to working solution, temporary stall includes to working solution: by volume percentages, 8.5% Degradable temporary blocking agent, 8.5% proppant, 8.5%-17% biodegradable fiber and low the gluing of 66%-74.5% carry liquid, Young's modulus according to different gas fields reservoir determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all by big particle diameter Degradable temporary blocking agent, when Young's modulus is when 25000-30000MPa, little particle diameter Degradable temporary blocking agent accounts for 70%, big particle diameter Degradable temporary blocking agent accounts for 30%, when Young's modulus is more than 30000MPa, little particle diameter Degradable temporary blocking agent accounts for 30%, big particle diameter Degradable temporary blocking agent accounts for 70%,
2) staged fracturing is carried out, infusion order be prepad fluid �� load fluid �� temporary stall to working solution, prepad fluid, load fluid ratio be 1:1, temporary stall is 30-40 side/section to working solution, big particle diameter Degradable temporary blocking agent is cut gets lodged in crack port, and little particle diameter Degradable temporary blocking agent is filled between big particle diameter Degradable temporary blocking agent;
3) after all pressure break completes, treating that temporary stall is degraded to working solution, discharge opeing, crack interruption-forming seepage channel stayed by proppant.
The preparation method of described Degradable temporary blocking agent is: at ambient temperature, by guanidine glue, aluminium sesquioxide, magnesium oxide, Ammonium persulfate. microcapsule degelling agent, sodium polyacrylate bead, sodium bicarbonate are according to the mass ratio mix homogeneously of 48:107:193:11��42:24:1.26, then mixture is slowly added in water under agitation, the mass ratio of mixture and water is (26��28): (72��74), can obtain this Degradable temporary blocking agent after stirring 5 minutes.
Described low viscous carry liquid and include: by mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer and 98.08% water.
Described prepad fluid includes: by mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent and 97.98% water.
Described load fluid includes: by mass percentage, 0.40% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent, 0.5% cross-linking agent and 97.38% water.
Embodiment 4:
Present embodiments provide and a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, comprise the following steps:
1) first determine that temporary stall is to working solution, temporary stall includes to working solution: by volume percentages, 8.5% Degradable temporary blocking agent, 8.5% proppant, 8.5%-17% biodegradable fiber and low the gluing of 66%-74.5% carry liquid, Young's modulus according to different gas fields reservoir determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all by big particle diameter Degradable temporary blocking agent, when Young's modulus is when 25000-30000MPa, little particle diameter Degradable temporary blocking agent accounts for 70%, big particle diameter Degradable temporary blocking agent accounts for 30%, when Young's modulus is more than 30000MPa, little particle diameter Degradable temporary blocking agent accounts for 30%, big particle diameter Degradable temporary blocking agent accounts for 70%,
2) staged fracturing is carried out, infusion order be prepad fluid �� load fluid �� temporary stall to working solution, prepad fluid, load fluid ratio be 1:1, temporary stall is 30-40 side/section to working solution, big particle diameter Degradable temporary blocking agent is cut gets lodged in crack port, and little particle diameter Degradable temporary blocking agent is filled between big particle diameter Degradable temporary blocking agent;
3) after all pressure break completes, treating that temporary stall is degraded to working solution, discharge opeing, crack interruption-forming seepage channel stayed by proppant.
The preparation method of described Degradable temporary blocking agent is: at ambient temperature, by guanidine glue, aluminium sesquioxide, magnesium oxide, Ammonium persulfate. microcapsule degelling agent, sodium polyacrylate bead, sodium bicarbonate are according to the ratio mix homogeneously of 48:107:193:11��42:24:1.26, then mixture is slowly added in water under agitation, the mass ratio of mixture and water is (26��28): (72��74), can obtain this Degradable temporary blocking agent after stirring 5 minutes.
Described low viscous carry liquid and include: by mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer and 98.08% water, described hydroxypropyl guar thickening agent model is CJ2-6, cleanup additive model is TGF-1, antibacterial model is CJSJ-3, foaming agent model is YFP-2, and clay stabilizer model is COP-2, and all can buy in Changqing oilfields Chemical Group company limited.
Described prepad fluid includes: by mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent and 97.98% water, described hydroxypropyl guar thickening agent model is CJ2-6, cleanup additive model is TGF-1, antibacterial model is CJSJ-3, foaming agent model is YFP-2, clay stabilizer model is COP-2, temperature stability agent model is TA-1, and all can buy in Changqing oilfields Chemical Group company limited.
Described load fluid includes: by mass percentage, 0.40% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent, 0.5% cross-linking agent and 97.38% water, described hydroxypropyl guar thickening agent model is CJ2-6, cleanup additive model is TGF-1, antibacterial model is CJSJ-3, foaming agent model is YFP-2, clay stabilizer model is COP-2, temperature stability agent model is TA-1, cross-linking agent model is JL-1, and all can buy in Changqing oilfields Chemical Group company limited.
Embodiment 5:
Present embodiments providing and a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, for Sulige gas field East Soviet Union and Eastern Europe * * H horizontal well of reviving, dividing potential drop 7 sections, 1,3,6 sections add Degradable temporary stalls to working solution, and specific implementation process is as follows:
(1) first configuring temporary stall to working solution, determine that according to the geologic characteristics of Soviet Union Sulige gas field East and offset well construction parameter the mechanical fraction of this well Degradable temporary blocking agent is 0.1m, 0.5m, 3mm, 7mm, ratio is 2:1.5:3:0.7. The density of proppant is identical with Degradable temporary blocking agent. Volume after Degradable temporary blocking agent and mixed with proppants and temporary stall are 17% to the ratio of working solution cumulative volume. The consumption of biodegradable fiber is the 65% of Degradable temporary blocking agent and proppant sum. The density of Degradable temporary blocking agent and proppant is identical, and the two mixes according to 1:1 ratio in working solution at temporary stall. Degradable temporary blocking agent, proppant and biodegradable fiber are dispersed in temporary stall inside working solution. Wherein the temporary stall of the 1st section is 32m to the consumption of working solution3, the 3rd section of consumption is 29m3, the 6th section of consumption is 25m3��
(2) pressure break the 1st section, infusion order be prepad fluid �� load fluid �� temporary stall to working solution.
(3) remaining each section of pressure break, wherein the 3rd, 6 sections, infusion order be prepad fluid �� load fluid �� temporary stall to working solution.
Etc. (4), after 7 sections of whole pressure breaks complete, closing well is treated to block up working solution degraded temporarily for 8 hours, and discharge opeing, crack interruption-forming seepage channel stayed by proppant.
Exemplified as above is only illustration to the present invention, is not intended that the restriction to protection scope of the present invention, every belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (10)
1. one kind keeps the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterised in that: comprise the following steps:
1) first determine that temporary stall is to working solution, temporary stall includes to working solution: by volume percentages, 8.5% Degradable temporary blocking agent, 8.5% proppant, 8.5%-17% biodegradable fiber and low the gluing of 66%-74.5% carry liquid, Young's modulus according to different gas fields reservoir determines the mechanical fraction of Degradable temporary blocking agent, when Young's modulus is when less than 25000MPa, all by big particle diameter Degradable temporary blocking agent, when Young's modulus is when 25000-30000MPa, little particle diameter Degradable temporary blocking agent accounts for 70%, big particle diameter Degradable temporary blocking agent accounts for 30%, when Young's modulus is more than 30000MPa, little particle diameter Degradable temporary blocking agent accounts for 30%, big particle diameter Degradable temporary blocking agent accounts for 70%,
2) staged fracturing is carried out, infusion order be prepad fluid �� load fluid �� temporary stall to working solution, prepad fluid, load fluid ratio be 1:1, temporary stall is 30-40 side/section to working solution, big particle diameter Degradable temporary blocking agent is cut gets lodged in crack port, and little particle diameter Degradable temporary blocking agent is filled between big particle diameter Degradable temporary blocking agent;
3) after all pressure break completes, treating that temporary stall is degraded to working solution, discharge opeing, crack interruption-forming seepage channel stayed by proppant.
2. according to claim 1 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: described Degradable temporary blocking agent particle size range is 0.1-10mm, little particle diameter Degradable temporary blocking agent particle size range is 0.1-1mm, and big particle diameter Degradable temporary blocking agent particle size range is 1-10mm.
3. according to claim 1 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: described biodegradable fiber diameter is 10 ��m, length is 5-10mm, molecular weight is 50,000-250 ten thousand, described proppant is the haydite of 20/40 order, 40/70 order or 70/140 order, and the density of proppant is identical with Degradable temporary blocking agent.
4. according to claim 1 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: the preparation method of described Degradable temporary blocking agent is: at ambient temperature, by guanidine glue, aluminium sesquioxide, magnesium oxide, Ammonium persulfate. microcapsule degelling agent, sodium polyacrylate bead, sodium bicarbonate is according to the mass ratio mix homogeneously of 48:107:193:11��42:24:1.26, then mixture is slowly added in water under agitation, the mass ratio of mixture and water is (26��28): (72��74), this Degradable temporary blocking agent can be obtained after stirring 5 minutes.
5. according to claim 1 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: described low viscous carry liquid and include: by mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer and 98.08% water.
6. according to claim 1 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: described prepad fluid includes: by mass percentage, 0.30% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent and 97.98% water.
7. according to claim 1 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: described load fluid includes: by mass percentage, 0.40% hydroxypropyl guar thickening agent, 0.5% cleanup additive, 0.12% antibacterial, 0.5% foaming agent, 0.5% clay stabilizer, 0.10% temperature stability agent, 0.5% cross-linking agent and 97.38% water.
8. according to claim 5 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: described hydroxypropyl guar thickening agent model is CJ2-6, cleanup additive model is TGF-1, antibacterial model is CJSJ-3, foaming agent model is YFP-2, clay stabilizer model is COP-2, and all can buy in Changqing oilfields Chemical Group company limited.
9. according to claim 6 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: described hydroxypropyl guar thickening agent model is CJ2-6, cleanup additive model is TGF-1, antibacterial model is CJSJ-3, foaming agent model is YFP-2, clay stabilizer model is COP-2, and temperature stability agent model is TA-1, and all can buy in Changqing oilfields Chemical Group company limited.
10. according to claim 7 a kind of keep the method for multiple crack fracturing sealing flow conductivity in net horizontal section, it is characterized in that: described hydroxypropyl guar thickening agent model is CJ2-6, cleanup additive model is TGF-1, antibacterial model is CJSJ-3, foaming agent model is YFP-2, and clay stabilizer model is COP-2, and temperature stability agent model is TA-1, cross-linking agent model is JL-1, and all can buy in Changqing oilfields Chemical Group company limited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511015216.6A CN105649593B (en) | 2015-12-31 | 2015-12-31 | Method for maintaining flow guiding capability of multi-fracture fracturing seam in horizontal well section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511015216.6A CN105649593B (en) | 2015-12-31 | 2015-12-31 | Method for maintaining flow guiding capability of multi-fracture fracturing seam in horizontal well section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105649593A true CN105649593A (en) | 2016-06-08 |
| CN105649593B CN105649593B (en) | 2018-06-01 |
Family
ID=56477312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511015216.6A Active CN105649593B (en) | 2015-12-31 | 2015-12-31 | Method for maintaining flow guiding capability of multi-fracture fracturing seam in horizontal well section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105649593B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150429A (en) * | 2016-08-24 | 2016-11-23 | 江汉油田科瑞德石油工程技术（武汉）有限公司 | Shale gas is multistage splits pressure diverting agent, without bridging plug fracturing process and device |
| CN106526137A (en) * | 2016-11-17 | 2017-03-22 | 青岛科技大学 | Physical simulation experiment evaluation method for fracturing performance and flow conductivity of self-suspension propping agent |
| CN106917619A (en) * | 2017-03-21 | 2017-07-04 | 中国石油天然气股份有限公司 | Temporary plugging steering and fracture supporting integrated transformation method for fractured carbonate reservoir |
| CN107100607A (en) * | 2017-04-12 | 2017-08-29 | 大庆中联信实石油科技开发有限公司 | Temporary stall is to fracturing process |
| CN107558980A (en) * | 2017-07-18 | 2018-01-09 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN109145497A (en) * | 2018-09-12 | 2019-01-04 | 中国石油大学(华东) | A kind of calculation method of hydraulic fracture near horizontal wellbore water blockoff plug agent amount |
| CN110259429A (en) * | 2019-06-06 | 2019-09-20 | 中国石油天然气股份有限公司 | Multistage dynamic temporary-plugging volume acid fracturing method |
| CN112253073A (en) * | 2020-11-20 | 2021-01-22 | 重庆地质矿产研究院 | Stepped pulse circulation temporary plugging complex fracture network fracturing method for deep low-permeability reservoir |
| CN113684010A (en) * | 2021-08-31 | 2021-11-23 | 陕西延长石油（集团）有限责任公司 | Temporary fracture plugging diverter and application thereof in temporary plugging diverting sand fracturing process |
| CN114109338A (en) * | 2021-12-07 | 2022-03-01 | 陕西海睿能源技术服务有限公司 | Temporary reconstruction method for shaft |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093864A (en) * | 2010-12-21 | 2011-06-15 | 中国石油天然气股份有限公司 | Temporary plugging diverting agent for repeated fracturing of oil-water well and preparation method thereof |
| US20120241152A1 (en) * | 2007-02-13 | 2012-09-27 | Baker Hughes Incorporated | Method of fracturing a subterranean formation at optimized and pre-determined conditions |
| CN103615228A (en) * | 2013-11-26 | 2014-03-05 | 中国石油天然气股份有限公司 | Temporary plugging and fracturing process in degradable fiber seam |
| CN105041287A (en) * | 2015-07-23 | 2015-11-11 | 中国石油天然气股份有限公司 | Fiber temporary plugging steering fracturing method for improving productivity of low-permeability tight sandstone oil and gas well |
| CN105089603A (en) * | 2015-07-13 | 2015-11-25 | 中国石油大学(北京) | Reservoir transformation method for forming fracture network by temporary plugging and steering in fracture |
-
2015
- 2015-12-31 CN CN201511015216.6A patent/CN105649593B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120241152A1 (en) * | 2007-02-13 | 2012-09-27 | Baker Hughes Incorporated | Method of fracturing a subterranean formation at optimized and pre-determined conditions |
| CN102093864A (en) * | 2010-12-21 | 2011-06-15 | 中国石油天然气股份有限公司 | Temporary plugging diverting agent for repeated fracturing of oil-water well and preparation method thereof |
| CN103615228A (en) * | 2013-11-26 | 2014-03-05 | 中国石油天然气股份有限公司 | Temporary plugging and fracturing process in degradable fiber seam |
| CN105089603A (en) * | 2015-07-13 | 2015-11-25 | 中国石油大学(北京) | Reservoir transformation method for forming fracture network by temporary plugging and steering in fracture |
| CN105041287A (en) * | 2015-07-23 | 2015-11-11 | 中国石油天然气股份有限公司 | Fiber temporary plugging steering fracturing method for improving productivity of low-permeability tight sandstone oil and gas well |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150429A (en) * | 2016-08-24 | 2016-11-23 | 江汉油田科瑞德石油工程技术（武汉）有限公司 | Shale gas is multistage splits pressure diverting agent, without bridging plug fracturing process and device |
| CN106526137A (en) * | 2016-11-17 | 2017-03-22 | 青岛科技大学 | Physical simulation experiment evaluation method for fracturing performance and flow conductivity of self-suspension propping agent |
| CN106917619B (en) * | 2017-03-21 | 2019-06-11 | 中国石油天然气股份有限公司 | Temporary plugging steering and fracture supporting integrated transformation method for fractured carbonate reservoir |
| CN106917619A (en) * | 2017-03-21 | 2017-07-04 | 中国石油天然气股份有限公司 | Temporary plugging steering and fracture supporting integrated transformation method for fractured carbonate reservoir |
| CN107100607A (en) * | 2017-04-12 | 2017-08-29 | 大庆中联信实石油科技开发有限公司 | Temporary stall is to fracturing process |
| CN107558980A (en) * | 2017-07-18 | 2018-01-09 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN107558980B (en) * | 2017-07-18 | 2020-05-08 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN109145497A (en) * | 2018-09-12 | 2019-01-04 | 中国石油大学(华东) | A kind of calculation method of hydraulic fracture near horizontal wellbore water blockoff plug agent amount |
| CN110259429A (en) * | 2019-06-06 | 2019-09-20 | 中国石油天然气股份有限公司 | Multistage dynamic temporary-plugging volume acid fracturing method |
| CN112253073A (en) * | 2020-11-20 | 2021-01-22 | 重庆地质矿产研究院 | Stepped pulse circulation temporary plugging complex fracture network fracturing method for deep low-permeability reservoir |
| CN113684010A (en) * | 2021-08-31 | 2021-11-23 | 陕西延长石油（集团）有限责任公司 | Temporary fracture plugging diverter and application thereof in temporary plugging diverting sand fracturing process |
| CN114109338A (en) * | 2021-12-07 | 2022-03-01 | 陕西海睿能源技术服务有限公司 | Temporary reconstruction method for shaft |
| CN114109338B (en) * | 2021-12-07 | 2023-09-05 | 陕西海睿能源技术服务有限公司 | Shaft temporary reconstruction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105649593B (en) | 2018-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105649593A (en) | Method for maintaining flow guiding capability of multi-fracture fracturing seam in horizontal well section | |
| CN105672970B (en) | Method for realizing temporary plugging, steering and multi-fracture fracturing in horizontal well section | |
| CN105649594B (en) | Method for maintaining near-wellbore zone crack flow conductivity of mine field | |
| CN107387053B (en) | Method for collaborative fracturing of main cracks and complex crack network of large channel | |
| CN112175596B (en) | Temporary plugging agent for efficiently plugging fractures in deep oil and gas reservoir seams, preparation method of temporary plugging agent and large-seam high-fracturing process | |
| CN110761765B (en) | Volume fracturing method for activating natural fracture in large range | |
| CN105089603B (en) | Reservoir transformation method for forming fracture network by temporary plugging and steering in fracture | |
| CN109751029B (en) | Deep shale gas fracturing method | |
| US20140299326A1 (en) | Method to Generate Diversion and Distribution For Unconventional Fracturing in Shale | |
| CN104099074B (en) | Volume fracturing reconstruction crack plugging agent and water plugging construction method | |
| CA3000260C (en) | Methods for performing fracturing and enhanced oil recovery in tight oil reservoirs | |
| CN106566511B (en) | A kind of surfactant micellar oil displacement agent | |
| RU2016118283A (en) | METHOD FOR SEALING SOLID MATERIALS DURING UNDERGROUND PROCESSING OPERATIONS | |
| CN101280678A (en) | Oil well chemical gorge and disgorge yield increasing and inverse direction regulating block connection working process | |
| CN110552656B (en) | Method for fixed-point crack initiation of low-permeability layer of water flooded well | |
| CN106703775B (en) | Coal bed gas fracturing method | |
| DE112013007504T5 (en) | Fibers as drag reducing support fibers in low permeability subterranean applications | |
| CN109915093A (en) | A kind of method that " stifled/tune/drive " integration improves oil recovery | |
| CN107630692A (en) | The temporary stall of man-made fracture is to fracturing process in a kind of layer of coal bed gas well | |
| CN109681179B (en) | Acid fracturing process method for forming differential etching | |
| CN106121613B (en) | Temporary stall is to fracturing technology method in a kind of coal bed gas well pit shaft | |
| CN109083626A (en) | It is a kind of to realize temporary stall to the fracturing process with high-speed channel by fiber | |
| CA3053107C (en) | Methods and treatment fluids for microfracture creation and microproppant delivery in subterranean formations | |
| CN103952130A (en) | Temporary blocking gel for low-pressure oil-gas well and preparation method thereof | |
| CN105131922B (en) | Workover treatment borehole wall resistance to compression stabilizer and its application process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |