Guar gum cleaning fracturing fluid with micro residue and weak damage

A technology for cleaning fracturing fluids and residues, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high damage rate, increase the internal surface area, reduce the use concentration, and have good temperature and shear resistance Effect

Inactive Publication Date: 2017-06-30
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a micro-residue and weak-damage guar gum cleaning fracturing fluid with excellent performance for the problems of large residue, high damage rate and damage caused by poor compatibility of the system in the conventional fracturing fluid system. , in order to reduce the concentration of hydroxypropyl guar gum and the amount of gel-breaking residue, protect the oil layer, while maintaining excellent sand-suspending ability and temperature-resistant and shear-resistant ability, reduce the damage caused by fracturing fluid to the reservoir, and improve the performance of fracturing construction. Success rate and fracturing effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 995mL of water into a beaker with a capacity of 1000mL, weigh 1.7g of hydroxypropyl guar gum, slowly add it into water under stirring, stir at high speed for 10min, and then add 1g of lauryl dimethyl amine oxide The high-efficiency drainage aid compounded with alkylphenol polyoxyethylene in a weight ratio of 10:8, 1g of 3-chloro-2-hydroxypropyltrimethylammonium chloride and potassium chloride in a ratio of 20:12 The anti-swelling stabilizer made by mixing the weight ratio, 0.5g of dodecyl dimethyl benzyl ammonium chloride (fracturing fungicide), 0.5g of polyether demulsifier AF6231, 0.6g of Sodium amine tetramethylene phosphonate, polyaspartic acid, and aminotrimethylene phosphonic acid were compounded and mixed according to the weight ratio of 8:6:8, and then continued to stir at high speed for 20 minutes, and then left to swell for 3 hours after mixing evenly; The base liquid 100g of above-mentioned preparation, under agitation state, add the low consumption guar ...

Embodiment 2

[0027]Add 991mL of water into a beaker with a capacity of 1000mL, weigh 2.5g of hydroxypropyl guar gum, slowly add it to water under stirring, stir at high speed for 10min, and then add 2g of lauryl dimethyl amine oxide High-efficiency drainage aid compounded with alkylphenol polyoxyethylene in a weight ratio of 12:8, 2g of 3-chloro-2-hydroxypropyltrimethylammonium chloride and potassium chloride in a weight ratio of 30:12 Anti-swelling stabilizer prepared by mixing, 1g of dodecyldimethylbenzyl ammonium chloride (fracturing fungicide), 1g of polyether demulsifier AF3125, 0.1g of ethylenediaminetetramethylene Sodium phosphonate (EDTMPS), polyaspartic acid (PASP) and aminotrimethylene phosphonic acid (ATP) in a weight ratio of 6:5:8 is a multifunctional antiscalant, and then continue to stir at high speed for 20 minutes. After mixing evenly, let it swell for 2 hours; take 100 g of the base liquid prepared above, and add 0.25 g of low-consumption guar polynuclear cross-linking ag...

Embodiment 3

[0029] Add 989mL of water into a beaker with a capacity of 1000mL, weigh 2.8g of hydroxypropyl guar gum, slowly add it to water under stirring, stir at high speed for 10min, and then add 3g of lauryl dimethyl amine oxide High-efficiency drainage aid compounded with alkylphenol polyoxyethylene in a weight ratio of 15:10, 3g of 3-chloro-2-hydroxypropyltrimethylammonium chloride and potassium chloride in a ratio of 25:15 Anti-swelling stabilizer made by mixing in weight ratio, 1g of dodecyldimethylbenzyl ammonium chloride (fracturing fungicide), 1g of polyether demulsifier AF1031, 0.3g of ethylenediaminetetramethylene Sodium methyl phosphonate (EDTMPS), polyaspartic acid (PASP) and amino trimethylene phosphonic acid (ATP) compounded in a weight ratio of 9:8:10 is a multifunctional antiscalant, and then continue to stir at high speed for 20 minutes , after mixing evenly, leave it to swell for 2h; get the base liquid 100g prepared above, and add 0.3g of low-consumption guar polynuc...

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PUM

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Abstract

The invention relates to guar gum cleaning fracturing fluid with micro residue and weak damage. The guar gum cleaning fracturing fluid with micro residue and weak damage is composed of base liquid, a cross-linking agent and a gel breaker, the base liquid is composed of hydroxypropyl guar gum, a cleanup additive, an anti-swelling stabilizing agent, a fracturing bactericide, a fracturing de-emulsifier, a scale inhibitor and water. According to the invention, a guar gum multinucleated cross-linking agent with low amount is used, delay crosslinking effect is strong, guar gum concentration is greatly reduced, glue breaking residue amount is reduced, a multifunctional scale inhibitor is cooperated for preventing fouling generated by water used for fracturing liquid and stratum water, a selective polymer fracturing catalyst capable of thoroughly breaking glue and no generating sulfate radical is selected, liquid viscosity and residue content are reduced, the surface tension of the gel breaker after gel is broken is lower, the gel breaker is easily discharged, the formed guar gum multinucleated cross-linking agent has good temperature and shearing sustainability, and excellent proppant carrying capacity.

Description

technical field [0001] The invention belongs to the technical field of preparation of petrochemical products, and relates to a guar gum cleaning fracturing fluid with little residue and weak damage. Background technique [0002] Fracturing fluid is the liquid used in fracturing measures using liquid conduction force in the process of oilfield exploitation, and it is also a key preparation to ensure the success of fracturing and improve recovery. At present, the hydraulic fracturing fluid system used in various domestic oilfields is mainly guar gum and its derivatives, which are formed by adding various additives and combining cross-linking agents and gel breakers. With the advantages of strong operability, wide application range and good comprehensive performance, it has been widely used in oil and gas field development so far. However, conventional fracturing fluid systems still have problems such as large residues, poor gel breaking, and large damage caused by poor compat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/528
CPCC09K8/528C09K8/605C09K8/685C09K8/887C09K2208/12C09K2208/26
Inventor 王佳李俊华沈燕宾李轶周渝路建萍谢元司伟
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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