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Shale gas well slickwater fracturing fluid system high-efficiency emulsion quick water-soluble drag reducer

A gas well slippery, water fracturing technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor compatibility, easy to form balls, difficult to water and other problems, to achieve convenient addition, fast dissolution, Good drag reduction effect

Active Publication Date: 2014-07-23
荆州市现代菲氏化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The drag reducer can reach 70% drag reduction efficiency when used in pressure cracking, and it solves the problem that the existing dry powder and W / O microemulsion drag reducer are easy to form balls and difficult to mix with water during use, and they are not compatible with pressure cracking fluid. The technical defect of poor compatibility of various ions and chemical additives in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The raw materials of component A, component B, component C and water are weighed according to the weight percentage of each component mentioned above.

[0055] Component A: 2-hydroxyethyl acrylate 1 kg, 2-hydroxyethyl methyl methacrylate 1 kg, 2-hydroxypropyl acrylate 1 kg, 2-hydroxypropyl methacrylate 1 kg, ethyl Oxylated-2-hydroxyethyl acrylate 5 kg, ethoxylated-2-hydroxyethyl methacrylate 2 kg, hydroxymethylstyrene 3 kg, vinyl acetate 1 kg, and acrylamide 4 kg . Component A represented 19% of the total weight of all reaction mixtures.

[0056] Component B: Poly[2-(methacryloyloxy)ethyl]trimethylammonium chloride 1 kg, poly[2-(acryloyloxy)ethyl]trimethylammonium chloride 2 kg, 2 kg of polyvinyl benzyl trimethyl ammonium chloride and 2 kg of polydimethyl diallyl ammonium chloride. Component B accounted for 7% of the total weight of all reaction mixtures.

[0057] Component C: 5 kg of sodium chloride, 10 kg of ammonium sulfate, 1 kg of potassium chloride, and 5 kg o...

Embodiment 2

[0061] The raw materials of component A, component B, component C and water are weighed according to the weight percentage of each component mentioned above.

[0062] Component A: 2-hydroxyethyl acrylate 2 kg, 2-hydroxyethyl methyl methacrylate 2 kg, 2-hydroxypropyl acrylate 2 kg, 2-hydroxypropyl methacrylate 1 kg, B Oxylated-2-hydroxyethyl acrylate 4 kg, ethoxylated-2-hydroxyethyl methacrylate 2 kg, hydroxymethylstyrene 1 kg, vinyl acetate 2 kg, and acrylamide 3 kg , Component A accounted for 19% of the total weight of all reaction mixtures.

[0063] Component B: poly[2-(methacryloyloxy)ethyl]trimethylammonium chloride 1 kg, poly[2-(acryloyloxy)ethyl]trimethylammonium chloride 3 kg, 1 kg of polyvinyl benzyl trimethyl ammonium chloride, 1 kg of polydimethyl diallyl ammonium chloride. Component B constituted 6% of the total weight of all reaction mixtures.

[0064] Component C: 5 kg of sodium chloride, 10 kg of ammonium sulfate, 5 kg of potassium chloride, and 5 kg of sodium...

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Abstract

The invention relates to a shale gas well slickwater fracturing fluid system high-efficiency emulsion quick water-soluble drag reducer, belonging to the technical field of oilfield drag reducers. The drag reducer is prepared by initiating polymerization of a component A, a component B and a component C by a free-radical initiator in water, wherein the component A is composed of a plurality of nonionic water-soluble monomers with carbon-carbon double bond; the component B is a water-soluble polymer stabilizer of univalent cationic monomers; and the component C is a univalent cationic inorganic salt. The drag reducer is simple to use, quick to hydrate and convenient to add, is green and environment-friendly, and has the advantages of high dissolution rate, no bubbling, salt resistance, calcium resistance, pollution resistance, high temperature resistance, favorable compatibility, no need of adding defoaming agent and the like; and the drag reduction efficiency can reach 70% when the drag reducer is used in fracturing. The drag reducer solves the problems of high tendency to granulation and low tendency to hydration in the use process of the existing drag reducer using dry powder, and the problem that the poor compatibility among various different ions and chemical assistants in the fracturing fluid can directly influence the feasibility and effectiveness of the slickwater fracturing.

Description

technical field [0001] The invention relates to a high-performance aquatic high-efficiency milky fast water-soluble drag reducer for shale gas well slick water fracturing fluid system with high compatibility and fast water reconciliation characteristics. It belongs to the technical field of oilfield drag reducer. Background technique [0002] In recent years, due to the widespread discovery and exploitation of shale gas fields, the slickwater pressure cracking technology that can improve the permeability of oil layers has also attracted more and more attention. [0003] Slippery water fracturing technology is to add a small amount of drag reducer and some other chemical additives and proppants to clean water or brine as a working fluid to inject into underground rock formations at high pressure and quickly to transform oil and gas reservoirs and increase the permeability of oil and gas layers, thereby Increase oil and gas production. Therefore, the performance of the drag ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/68C09K8/882C09K2208/28
Inventor 余维初吴军
Owner 荆州市现代菲氏化工科技有限公司
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