CN103867177A - Horizontal well fracturing method - Google Patents
Horizontal well fracturing method Download PDFInfo
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- CN103867177A CN103867177A CN201210545185.5A CN201210545185A CN103867177A CN 103867177 A CN103867177 A CN 103867177A CN 201210545185 A CN201210545185 A CN 201210545185A CN 103867177 A CN103867177 A CN 103867177A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a horizontal well fracturing method, which comprises the following steps: s1, carrying out first-section perforation of the operation well, and carrying out first-section fracturing by the optical casing; s2, putting the bridge plug and the perforation tool string into the operation well, seating the bridge plug, and testing the pressure to be qualified; s3, lifting the perforating tool string to perform a second section of perforation according to the position of the second perforating section, and performing a second section of fracturing by the optical sleeve; s4, lowering the second section of bridge plug and setting the second section of bridge plug by the same method in the step S2; and S5, repeating the steps S3 and S4 until the fracturing operation of all intervals of the operation well is completed. The lower-layer packing is realized through the bridge plug, and whether the bridge plug is effective in packing can be judged through pressure testing; the construction displacement of the whole well section is more than 10 square/minute by adopting the optical sleeve injection fracturing, and the requirement of the volume fracturing of the horizontal well on the displacement is met.
Description
Technical field
The present invention relates to petroleum production engineering field, particularly a kind of fracture method for horizontal well.
Background technology
Pressure break is the technology being widely used in Oil/gas Well, refers in oil recovery or gas production process, utilizes hydraulic action to make oil-gas Layer form a kind of method in crack, is called again fracturing.Oil-gas Layer fracturing technology process is clamp-oned oil reservoir with the liquid that fracturing unit truck has certain viscosity high-pressure large-displacement, when oil reservoir is extruded behind many cracks, adds proppant pack to enter crack, improves the penetrating power of oil-gas Layer, to increase water injection rate or oil production.
At present, most domestic oilfield horizontal well is transformed mainly taking jetting staged fracturing as main body renovation technique.Its major technique way is exactly: by hydraulic jet perforation, add sand, sleeve pipe fluid infusion, drag tubing string and realize multistage fracturing reform with the put into effect existing effect packing, oil pipe of pony packer connection.Adopt this technology to carry out the test of large discharge capacity horizontal well volume fracturing, obtained certain effect.Also there is many-sided problem simultaneously.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem: existing jetting staged fracturing technology is limited by discharge capacity, maximum operational discharge capacity only can reach 8 sides/point; And under large discharge capacity injection condition, seriously, single time tubing string only can complete one section of pressure break for ejector, packer injury, and efficiency of construction is low, and duty cycle is long.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the present invention provides a kind of horizontal fracturing process.Described technical scheme is as follows:
A kind of fracture method for horizontal well is provided, and described method comprises the steps:
S1, utilizes the mode of oil tube transmission perforation to carry out the first paragraph perforation of well in operation, trips out perforating gun after completing described first paragraph perforation, and light sleeve pipe carries out first paragraph pressure break, open flow not after described first paragraph pressure break completes;
S2, is lowered into bridging plug and perforation tool string in described well in operation, from ground with bridging plug described in fracturing unit truck pumping to setting described bridging plug the precalculated position of described well in operation, pressure testing is qualified;
S3, according to the position of the second perforated interval, promote described perforation tool string and carry out second segment perforation to described the second perforated interval, trip out described perforation tool string after completing described second segment perforation, light sleeve pipe carries out second segment pressure break, and described second segment pressure break completes afterwards not open flow;
S4, transfers second segment bridging plug setting described second segment bridging plug by method same in step S2;
S5, repeating step S3 and S4, until complete the whole interval fracturing works of described well in operation.
Further, first paragraph perforation described in step S1 is to adopt firepower perforation.
Further, first paragraph perforation described in step S1 and S3 and described second segment perforation all adopt many showers hole.
Further, when in step S3, light sleeve pipe carries out second segment pressure break, the replacement stage was taked replacement, and displacement fluid is weak crosslinked early stage.
Further, described method also comprised step before implementation step S1: use the artificial bottom of a well of drift size gauge tool drifting to described well in operation, guarantee that described well in operation pit shaft is clean.
Further, described method also comprises step after implementation step S5: bore except bridging plug, open flow, ask and produce and completion.
The principle of the multistage sub-clustering perforation press cracking method of horizontal well of the present invention is:
Fast brill bridging plug cable being connected by waterpower pumping and perforating gun connection are made drilling tool down to precalculated position, setting and discharge after bridging plug, on carry multi-stage perforator device to perforation position and carry out many showers hole, then drilling tool is carried to well head, adopt large discharge capacity light sleeve pipe to inject pressing crack construction, repeat above-mentioned operation, complete successively multiple interval operations from bottom to top, finally adopt and bore bridging plug, completion.This technology has that packing is reliable, dividing potential drop progression is unrestricted, the accurate positioning of classification perforation, feature that efficiency of construction is high, can realize the large displacement volume pressure break of horizontal well object.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
Realize lower floor's packing by bridging plug, can judge whether string layer by pressure testing, packing validity is good.Adopt light sleeve pipe inject pressure break realized full well section operational discharge capacity 10 sides/point more than, realized the requirement of horizontal well volume fracturing to discharge capacity; Well is interior without tubing string, with compared with common process, without bit freezing risk simultaneously.Bridging plug and classification perforation connection are done, and under the condition of ground installation and fracturing fluid abundance, can work continuously, and realize the operation of the whole intervals of a bite Horizontal Well.Carry out packing by pumping into step by step bridging plug, point pressure break progression is unrestricted, can realize in theory infinite stages separate stratum fracfturing.Reduce frequent rising lower tubular column and open flow time under conventional jetting technique, greatly reduced labour intensity, shortened duty cycle.The accurate positioning of classification perforation, can realize a perforation more than four bunches.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the fracture method for horizontal well process chart that the embodiment of the present invention one provides;
Fig. 2 is the fracture method for horizontal well process chart that the embodiment of the present invention two provides.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment mono-
The present embodiment provides a kind of fracture method for horizontal well, and referring to Fig. 1, described fracturing process comprises the steps:
S1, utilizes the mode of oil tube transmission perforation to carry out the first paragraph perforation 1 of well in operation, trips out perforating gun after completing first paragraph perforation 1, and light sleeve pipe carries out first paragraph pressure break 2, open flow not after first paragraph pressure break 2 completes, and closing well waits lower continuous step.
S2, implementation step: transfer bridging plug and perforation tool string 3 and setting bridging plug and pressure testing 4.Even bridging plug and perforation tool string are lowered in well in operation with cable, arrive after certain hole deviation, from ground, with fracturing unit truck pumping bridging plug, pump displacement strengthens gradually with hole deviation increase, until bridging plug arrives precalculated position.The ground setting bridging plug of lighting a fire, test pressure is until qualified.
S3, according to the position of the second perforated interval, rises to the second perforated interval by successively going up portable cable by perforation tool string, and second segment perforation 5 is carried out in igniting.After completing second segment perforation 5, trip out perforation tool string 6, light sleeve pipe carries out second segment pressure break 7, and second segment pressure break 7 completes afterwards not open flow.
S4, transfers second segment bridging plug setting second segment bridging plug by method same in step S2.S5, implementation step: repeat above-mentioned steps, until complete whole interval pressure breaks 8.Be repeating step S3 and S4, until the whole interval fracturing works of the well that fulfils assignment.
Each section of pressure break in this fracturing process all adopt light sleeve pipe inject pressure break, realized full well section operational discharge capacity 10 sides/point more than, realized the requirement of horizontal well volume fracturing to discharge capacity; Well is interior without tubing string, with compared with common process, without bit freezing risk simultaneously.Bridging plug and classification perforation connection are done, and under the condition of ground installation and fracturing fluid abundance, can work continuously, and realize the operation of the whole intervals of a bite Horizontal Well.Carry out packing by pumping into step by step bridging plug, point pressure break progression is unrestricted, can realize in theory infinite stages separate stratum fracfturing.
Preferably, the first paragraph perforation in step S1 is to adopt firepower perforation.In step S1 and S3, first paragraph perforation and second segment perforation all adopt many showers hole.Like this, reduce frequent rising lower tubular column and open flow time under conventional jetting technique, greatly reduced labour intensity, shortened duty cycle.The accurate positioning of classification perforation, can realize a perforation more than four bunches.When in step S3, light sleeve pipe carries out second segment pressure break, for guaranteeing the pumping smoothly of subordinate bridging plug, the replacement stage was taked replacement, and displacement fluid is weak crosslinked early stage, and open flow not after pressure break is complete, guarantees that horizontal segment is residual without proppant.
Embodiment bis-
The present embodiment provides a kind of fracture method for horizontal well, and referring to Fig. 2, described method comprises pressure break steps all in embodiment mono-, removes this has also comprised other step before step S1 and after step S5.In the present embodiment, this is no longer going to repeat them with step identical in embodiment mono-.Introduce especially the step also comprising except embodiment mono-.
The method also comprised step before implementation step S1: use drift size gauge tool drifting 01.Use the artificial bottom of a well of drift size gauge tool drifting to described well in operation, guarantee that described well in operation pit shaft is clean.Like this, whether meet standard by the internal diameter of drift size gauge tool Inspection well, if well in operation has distortion or stops up, check the biggest size of element that the well in operation after distortion or obstruction can pass through.And if the maximum physical dimension that can pass through does not meet pressure break requirement, pressure break is implemented in now well workover again.
The method also comprises step after implementation step S5: bore except bridging plug, open flow, ask and produce and completion 9.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. a fracture method for horizontal well, is characterized in that, described method comprises the steps:
S1, utilizes the mode of oil tube transmission perforation to carry out the first paragraph perforation of well in operation, trips out perforating gun after completing described first paragraph perforation, and light sleeve pipe carries out first paragraph pressure break, open flow not after described first paragraph pressure break completes;
S2, is lowered into bridging plug and perforation tool string in described well in operation, from ground with bridging plug described in fracturing unit truck pumping to setting described bridging plug the precalculated position of described well in operation, pressure testing is qualified;
S3, according to the position of the second perforated interval, promote described perforation tool string and carry out second segment perforation to described the second perforated interval, trip out described perforation tool string after completing described second segment perforation, light sleeve pipe carries out second segment pressure break, and described second segment pressure break completes afterwards not open flow;
S4, transfers second segment bridging plug setting described second segment bridging plug by method same in step S2;
S5, repeating step S3 and S4, until complete the whole interval fracturing works of described well in operation.
2. fracture method for horizontal well according to claim 1, is characterized in that, the perforation of first paragraph described in step S1 is to adopt firepower perforation.
3. fracture method for horizontal well according to claim 1, is characterized in that, first paragraph perforation described in step S1 and S3 and described second segment perforation all adopt many showers hole.
4. fracture method for horizontal well according to claim 3, is characterized in that, when in step S3, light sleeve pipe carries out second segment pressure break, the replacement stage was taked replacement, and displacement fluid is weak crosslinked early stage.
5. fracture method for horizontal well according to claim 1, is characterized in that, described method also comprised step before implementation step S1: use the artificial bottom of a well of drift size gauge tool drifting to described well in operation, guarantee that described well in operation pit shaft is clean.
6. fracture method for horizontal well according to claim 1, is characterized in that, described method also comprises step after implementation step S5: bore except bridging plug, open flow, ask and produce and completion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210545185.5A CN103867177A (en) | 2012-12-14 | 2012-12-14 | Horizontal well fracturing method |
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|---|---|---|---|
| CN201210545185.5A CN103867177A (en) | 2012-12-14 | 2012-12-14 | Horizontal well fracturing method |
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| CN103867177A true CN103867177A (en) | 2014-06-18 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458154A (en) * | 2014-12-04 | 2015-03-25 | 中国石油天然气股份有限公司 | Method for rapidly evaluating packing effectiveness of open hole packer of gas field horizontal well in mine field |
| CN104564003A (en) * | 2014-12-23 | 2015-04-29 | 中国石油天然气股份有限公司 | Drilling plug-free pumping type hydraulic bridge plug staged fracturing method |
| CN104989358A (en) * | 2015-06-18 | 2015-10-21 | 中国石油化工股份有限公司华东分公司采油厂 | Shale gas horizontal well bridge plug separation and ball throwing segmented fracturing process |
| CN105370259A (en) * | 2014-08-29 | 2016-03-02 | 中国石油化工股份有限公司 | Staged fracturing method of horizontal well |
| CN106593387A (en) * | 2016-12-21 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for realizing staged multi-cluster fracturing of horizontal well |
| CN106968660A (en) * | 2017-06-06 | 2017-07-21 | 华美孚泰油气增产技术服务有限责任公司 | A kind of new pressure break high pressure line connection combination and corresponding high pressure delivery system |
| CN107725009A (en) * | 2016-08-12 | 2018-02-23 | 中国石油化工股份有限公司 | A kind of completion method for horizontal well |
| CN108952677A (en) * | 2018-07-25 | 2018-12-07 | 西安石油大学 | A kind of small scale fracturing test method being suitable for shale gas well |
| CN109138983A (en) * | 2018-07-20 | 2019-01-04 | 中国石油天然气股份有限公司 | Pumping displacement calculation method and device and computer storage medium |
| CN110130867A (en) * | 2019-04-16 | 2019-08-16 | 中国石油天然气股份有限公司 | Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well |
| CN111236914A (en) * | 2020-01-19 | 2020-06-05 | 中国石油大学(北京) | Horizontal well multi-fracture fracturing method |
| CN114622887A (en) * | 2022-02-10 | 2022-06-14 | 中国石油化工集团有限公司 | Single-well zipper-type fracturing gas testing construction method |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370259A (en) * | 2014-08-29 | 2016-03-02 | 中国石油化工股份有限公司 | Staged fracturing method of horizontal well |
| CN104458154B (en) * | 2014-12-04 | 2017-03-08 | 中国石油天然气股份有限公司 | Method for rapidly evaluating packing effectiveness of open hole packer of gas field horizontal well in mine field |
| CN104458154A (en) * | 2014-12-04 | 2015-03-25 | 中国石油天然气股份有限公司 | Method for rapidly evaluating packing effectiveness of open hole packer of gas field horizontal well in mine field |
| CN104564003A (en) * | 2014-12-23 | 2015-04-29 | 中国石油天然气股份有限公司 | Drilling plug-free pumping type hydraulic bridge plug staged fracturing method |
| CN104989358A (en) * | 2015-06-18 | 2015-10-21 | 中国石油化工股份有限公司华东分公司采油厂 | Shale gas horizontal well bridge plug separation and ball throwing segmented fracturing process |
| CN107725009B (en) * | 2016-08-12 | 2020-07-31 | 中国石油化工股份有限公司 | Well completion method for horizontal well |
| CN107725009A (en) * | 2016-08-12 | 2018-02-23 | 中国石油化工股份有限公司 | A kind of completion method for horizontal well |
| CN106593387A (en) * | 2016-12-21 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for realizing staged multi-cluster fracturing of horizontal well |
| CN106593387B (en) * | 2016-12-21 | 2019-11-08 | 中国石油天然气股份有限公司 | Method for realizing staged multi-cluster fracturing of horizontal well |
| CN106968660A (en) * | 2017-06-06 | 2017-07-21 | 华美孚泰油气增产技术服务有限责任公司 | A kind of new pressure break high pressure line connection combination and corresponding high pressure delivery system |
| CN109138983A (en) * | 2018-07-20 | 2019-01-04 | 中国石油天然气股份有限公司 | Pumping displacement calculation method and device and computer storage medium |
| CN109138983B (en) * | 2018-07-20 | 2022-05-10 | 中国石油天然气股份有限公司 | Pumping displacement calculation method and device and computer storage medium |
| CN108952677A (en) * | 2018-07-25 | 2018-12-07 | 西安石油大学 | A kind of small scale fracturing test method being suitable for shale gas well |
| CN110130867B (en) * | 2019-04-16 | 2021-08-31 | 中国石油天然气股份有限公司 | Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well |
| CN110130867A (en) * | 2019-04-16 | 2019-08-16 | 中国石油天然气股份有限公司 | Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well |
| CN111236914A (en) * | 2020-01-19 | 2020-06-05 | 中国石油大学(北京) | Horizontal well multi-fracture fracturing method |
| CN114622887A (en) * | 2022-02-10 | 2022-06-14 | 中国石油化工集团有限公司 | Single-well zipper-type fracturing gas testing construction method |
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