CN106753313B

CN106753313B - Fiber slickwater fracturing fluid

Info

Publication number: CN106753313B
Application number: CN201611055639.5A
Authority: CN
Inventors: 任山; 郭建春; 卢聪; 张绍彬; 寇将; 王梦莹
Original assignee: Chengdu Laienpusi Science And Technology Co Ltd
Current assignee: Chengdu Laienpusi Science And Technology Co Ltd
Priority date: 2016-11-25
Filing date: 2016-11-25
Publication date: 2020-02-21
Anticipated expiration: 2036-11-25
Also published as: CN106753313A

Abstract

The invention relates to the technical field of oil and gas field reservoir transformation, in particular to a fiber slickwater fracturing fluid which comprises the following raw materials in percentage by mass: 0.1-0.4% of thickening agent, 0.1-0.4% of cross-linking agent, 0.3-0.5% of fiber, 5-30% of propping agent, 0.1-0.4% of anti-swelling agent, 0.1-0.4% of cleanup additive and the balance of water. The fiber slickwater fracturing fluid is widely applied to sand fracturing of various oil and gas wells, remarkably reduces the use concentration of a thickening agent, greatly increases the sand carrying capacity of the fracturing fluid, reduces the viscosity of a base fluid, reduces the damage to the stratum, improves the oil and gas yield, and has important significance for promoting the development of reservoir transformation of oil and gas fields.

Description

Fiber slickwater fracturing fluid

Technical Field

The invention relates to the technical field of oil and gas field reservoir transformation, in particular to a fiber slickwater fracturing fluid.

Background

Oil and gas wells require extensive reservoir modification before production can be industrially exploited. The fracturing fluid is used for improving the flow conductivity of cracks in the oil-gas well reservoir transformation, and with the appearance of a large-scale fracturing technology, higher requirements are put forward on the sand carrying performance of the fracturing fluid. On the other hand, with the deep development of oil and gas reservoirs, medium and low permeability oil and gas reservoirs are increasingly increased, low residue and low damage of fracturing fluid are required, and the pressure fluid with high thickener dosage is difficult to meet the requirement. How to realize high sand ratio and reduce the consumption of a thickening agent as much as possible is a problem which is relatively troublesome in the field of fracturing fluid in reservoir reconstruction of the existing oil-gas well.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the fiber slickwater fracturing fluid, which obviously reduces the use concentration of a thickening agent, greatly increases the sand carrying capacity of the fracturing fluid, reduces the viscosity of a base fluid, reduces the damage to the stratum and improves the oil gas yield.

The purpose of the invention is realized by the following technical scheme:

the fiber slickwater fracturing fluid consists of the following raw materials in percentage by mass:

further, the thickening agent is emulsion or powder of anionic polyacrylamide.

Further, the cross-linking agent is an organic zirconium cross-linking agent, and the organic zirconium cross-linking agent comprises the following components in parts by weight:

further, the fiber is at least one of polyvinyl alcohol fiber, modified polyester fiber and polyurethane fiber.

Further, the diameter of the fiber is 10-100 μm, the length is 3-15mm, the tensile strength is 20-800MPa, and the solubility of the fiber is as follows: can be dissolved in water solution with the temperature of more than 50 ℃, the dissolving time is more than 30min, and the dissolving rate is more than 95 percent; or dissolving the raw materials in 5-20% hydrochloric acid at the temperature of more than 50 ℃, wherein the dissolving time is more than 30min, and the dissolving rate is more than 95%.

Further, the proppant is at least one of quartz sand, ceramsite, long bluestone, glass ball and metal ball.

Further, the cleanup additive is at least one of fluorocarbon, op-10, sodium dodecyl benzene sulfonate, propanol and isopropanol.

Further, the clay stabilizer is at least one of potassium chloride, ammonium chloride, choline chloride and hexadecyl trimethyl ammonium chloride.

The invention has the beneficial effects that: the fiber slickwater fracturing fluid is widely applied to sand fracturing of various oil and gas wells, remarkably reduces the use concentration of a thickening agent, greatly increases the sand carrying capacity of the fracturing fluid, reduces the viscosity of a base fluid, reduces the damage to the stratum, improves the oil and gas yield, and has important significance for promoting the development of reservoir transformation of oil and gas fields.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the following specific examples, but the scope of the present invention is not limited to the following.

Example 1

The fiber slickwater fracturing fluid consists of the following raw materials in percentage by mass: 0.2% of thickening agent, 0.1% of cross-linking agent, 0.3% of fiber, 5% of propping agent, 0.1% of anti-swelling agent, 0.1% of cleanup additive and the balance of water;

the thickening agent is anionic polyacrylamide, the cross-linking agent is an organic zirconium cross-linking agent, and the organic zirconium cross-linking agent comprises the following components in parts by weight: 36 parts of deionized water, 4 parts of zirconium trichloride, 12 parts of ethylene glycol, 5 parts of lactic acid, 0.1 part of sodium chloride and 0.01 part of ammonium chloride; the fiber is modified polyester fiber, the diameter is 10-100 μm, the length is 3-15mm, the tensile strength is 20-800MPa, and the solubility of the fiber is as follows: can be dissolved in water solution with the temperature of more than 50 ℃, the dissolving time is more than 30min, and the dissolving rate is more than 95 percent; or dissolving in 5-20% hydrochloric acid at a temperature above 50 deg.C for more than 30min, wherein the dissolution rate is more than 95%, the proppant is quartz sand, the cleanup additive is fluorocarbon and isopropanol, and the clay stabilizer is potassium chloride and ammonium chloride.

Example 2

The fiber slickwater fracturing fluid consists of the following raw materials in percentage by mass: 0.4% of thickening agent, 0.3% of cross-linking agent, 0.4% of fiber, 30% of propping agent, 0.3% of anti-swelling agent, 0.2% of cleanup additive and the balance of water;

the thickening agent is an emulsion of anionic polyacrylamide, the cross-linking agent is an organic zirconium cross-linking agent, and the organic zirconium cross-linking agent comprises the following components in parts by weight: 72 parts of deionized water, 28 parts of zirconium trichloride, 30 parts of ethylene glycol, 15 parts of lactic acid, 0.5 part of sodium chloride and 0.03 part of ammonium chloride; the fiber is polyvinyl alcohol fiber, the diameter of the fiber is 10-100 μm, the length of the fiber is 3-15mm, the tensile strength is 20-800MPa, and the dissolving performance of the fiber is as follows: can be dissolved in water solution with the temperature of more than 50 ℃, the dissolving time is more than 30min, and the dissolving rate is more than 95 percent; or dissolving in 5-20% hydrochloric acid at a temperature above 50 deg.C for more than 30min, wherein the dissolution rate is more than 95%, the proppant is ceramsite, the cleanup additive is op-10 and sodium dodecyl benzene sulfonate, and the clay stabilizer is choline chloride and cetyltrimethylammonium chloride.

Example 3

The fiber slickwater fracturing fluid consists of the following raw materials in percentage by mass: 0.3% of thickening agent, 0.1% of cross-linking agent, 0.4% of fiber, 12% of propping agent, 0.2% of anti-swelling agent, 0.15% of cleanup additive and the balance of water;

the thickening agent is anionic polyacrylamide powder, the cross-linking agent is an organic zirconium cross-linking agent, and the organic zirconium cross-linking agent comprises the following components in parts by weight: 55 parts of deionized water, 12 parts of zirconium trichloride, 18 parts of ethylene glycol, 10 parts of lactic acid, 0.4 part of sodium chloride and 0.02 part of ammonium chloride; the fiber is polyurethane fiber, the diameter of the fiber is 10-100 μm, the length of the fiber is 3-15mm, the tensile strength is 20-800MPa, and the solubility of the fiber is as follows: can be dissolved in water solution with the temperature of more than 50 ℃, the dissolving time is more than 30min, and the dissolving rate is more than 95 percent; or dissolving the support agent in 5-20% hydrochloric acid at the temperature of more than 50 ℃, wherein the dissolving time is more than 30min, the dissolving rate is more than 95%, the support agent is long bluestone and glass spheres, the cleanup additive is propanol, and the clay stabilizer is potassium chloride and ammonium chloride.

Example 4

The fiber slickwater fracturing fluid consists of the following raw materials in percentage by mass: 0.12% of thickening agent, 0.2% of cross-linking agent, 0.34% of fiber, 14% of propping agent, 0.25% of anti-swelling agent, 0.18% of cleanup additive and the balance of water;

the thickening agent is anionic polyacrylamide, the cross-linking agent is an organic zirconium cross-linking agent, the fiber is modified polyester fiber, the propping agent is quartz sand and metal balls, the cleanup additive is sodium dodecyl benzene sulfonate, and the clay stabilizing agent is potassium chloride and ammonium chloride.

The performance of the fiber slickwater fracturing fluids obtained in examples 1-4 was tested, and the test results are shown in table 1:

table 1 examples 1-4 evaluation tables of properties of fiber slickwater fracturing fluids

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The fiber slickwater fracturing fluid is characterized by comprising the following raw materials in percentage by mass:

0.1 to 0.4 percent of thickening agent,

0.1 to 0.4 percent of cross-linking agent,

0.3 to 0.5 percent of fiber,

5 to 30 percent of propping agent,

0.1 to 0.4 percent of anti-swelling agent,

0.1 to 0.4 percent of discharge assistant agent,

the balance of water;

the thickening agent is emulsion or powder of anionic polyacrylamide; the fiber is at least one of polyvinyl alcohol fiber, modified polyester fiber and polyurethane fiber; the cross-linking agent is an organic zirconium cross-linking agent, and the organic zirconium cross-linking agent comprises the following components in parts by weight:

36-72 parts of deionized water, namely,

3-28 parts of zirconium trichloride,

12-30 parts of ethylene glycol,

5-15 parts of lactic acid, namely,

0.1 to 0.5 portion of sodium chloride,

0.01-0.03 part of ammonium chloride.

2. The fiber slickwater fracturing fluid as claimed in claim 1, wherein the fiber has a diameter of 10-100 μm, a length of 3-15mm, a tensile strength of 20-800MPa, and a fiber solubility of: can be dissolved in water solution with the temperature of more than 50 ℃, the dissolving time is more than 30min, and the dissolving rate is more than 95 percent; or dissolving the raw materials in 5-20% hydrochloric acid at the temperature of more than 50 ℃, wherein the dissolving time is more than 30min, and the dissolving rate is more than 95%.

3. The fiber slickwater fracturing fluid of claim 1, wherein the proppant is at least one of quartz sand, ceramsite, feldspar, glass spheres and metal spheres.

4. The fiber slickwater fracturing fluid of claim 1, wherein the cleanup additive is at least one of fluorocarbon, op-10, sodium dodecyl benzene sulfonate, propanol, and isopropanol.