Multifunctional emulsion-type salt-tolerant fracturing fluid and production method thereof

An emulsion type, fracturing fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of inability to meet the temperature resistance, salt resistance and crosslinkability of the reservoir, and achieve the maximum energy Chemical utilization, reduction of surface tension and interfacial tension, and excellent drag reduction performance

Inactive Publication Date: 2019-11-12
CHINA PETROCHEMICAL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fracturing fluid described in this patent has the characteristics of low viscosity, thorough gel breaking, easy flowback, good anti-swelling performance, low friction resistance, etc., and the drag reduction effect is obvious, but it still cannot meet the requirements of the reservoir for temperature resistance, salt resistance, Requirements for cross-linkability, etc.
Therefore, the existing technology has a large room for improvement

Method used

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  • Multifunctional emulsion-type salt-tolerant fracturing fluid and production method thereof
  • Multifunctional emulsion-type salt-tolerant fracturing fluid and production method thereof
  • Multifunctional emulsion-type salt-tolerant fracturing fluid and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A multifunctional emulsion type salt-resistant fracturing fluid, comprising the following raw materials: 0.4g of emulsion drag reducer, 0.4g of drainage aid, 0.8g of clay stabilizer, and 400g of water; wherein, the emulsion drag reducer is hyperbranched amphoteric Polyacrylamide and its derivatives. The drainage aid is a fluorine-containing drainage aid compounded by a hydrocarbon-based surfactant and a fluorine-containing surfactant. The clay stabilizer is a cationic clay stabilizer and KCl or NH 4 Composite clay stabilizer made of Cl compound.

[0029] The preparation method of the hyperbranched amphoteric polyacrylamide is: adding a certain amount of emulsifier Span-80, emulsifier Span-60, emulsifier OP-10 and solvent Isopar M In the reaction vessel, stir to make it completely dissolved; under the condition of 40-65 ℃ constant temperature water bath, add a certain amount of acrylamide and deionized water to heat-resistant aliphatic hyperbranched polyester, pass N 2...

Embodiment 2

[0032]A multifunctional emulsion type salt-resistant fracturing fluid, including the following raw materials: 2g of emulsion drag reducer, 0.6g of drainage aid, 1g of clay stabilizer, 0.024g of polymer breaker, 0.024g of polymer breakage aid, and 400g of water ; Wherein, the emulsion drag reducer is hyperbranched amphoteric polyacrylamide and its derivatives, and the drainage aid is a fluorine-containing drainage aid compounded by a hydrocarbon-based surfactant and a fluorine-containing surfactant , the clay stabilizer is cationic clay stabilizer and KCl or NH 4 Cl composite compound clay stabilizer; the polymer breaker is benzoyl peroxide; the polymer breaker auxiliary agent is sodium gluconate.

[0033] The preparation method of the hyperbranched amphoteric polyacrylamide is the same as in Example 1.

[0034] The preparation method of the multifunctional emulsion type salt-resistant fracturing fluid is as follows: weighing raw material components according to the formula; a...

Embodiment 3

[0036] A multifunctional emulsion-type salt-resistant fracturing fluid, including the following raw materials: 6g of emulsion drag reducer, 1g of drainage aid, 1.6g of clay stabilizer, 0.16g of polymer breaker, 0.16g of polymer breakage aid, and 400g of water ; Wherein, the emulsion drag reducer is hyperbranched amphoteric polyacrylamide and its derivatives, and the drainage aid is a fluorine-containing drainage aid compounded by a hydrocarbon-based surfactant and a fluorine-containing surfactant , the clay stabilizer is cationic clay stabilizer and KCl or NH 4 Cl composite compound clay stabilizer; the polymer breaker is potassium dichromate; the polymer breaker assistant is hexamethylenetetramine.

[0037] The preparation method of the hyperbranched amphoteric polyacrylamide is the same as in Example 1.

[0038] The preparation method of the multifunctional emulsion type salt-resistant fracturing fluid is the same as that in Example 2.

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Abstract

The invention relates to the technical field of fracturing reformation of oil and gas reservoirs, in particular to multifunctional emulsion-type salt-tolerant fracturing fluid and a production methodthereof. The multifunctional emulsion-type salt-tolerant fracturing fluid comprises the following raw materials in parts by weight: 0.1-2 parts of an emulsion drag reducer, 0.1-0.3 part of a cleanup additive, 0.2-0.5 part of a clay stabilizer, 0-0.6 part of cross-linking agents, 0-0.08 part of polymer breakers, 0-0.08 part of polymer breaking assistants and 100 parts of water, wherein the emulsiondrag reducer is hyperbranched amphoteric polyacrylamide and a derivative of the hyperbranched amphoteric polyacrylamide. According to the multifunctional emulsion-type salt-tolerant fracturing fluidand the production method thereof, through synergism of the emulsion drag reducer and the components, the fracturing fluid with excellent comprehensive performance of temperature resistance, salt tolerance, shear resistance, anti-swelling performance and the like is obtained so that different requirements of a reservoir can be met.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir fracturing reconstruction, and more specifically relates to a functional crosslinkable emulsion type salt-resistant fracturing fluid and a preparation method thereof. Background technique [0002] At present, the mixed fracturing fluid formed by slick water, linear gel and jelly fracturing fluid is mainly used for volume fracturing at home and abroad. Among them, slick water fracturing fluid is the most widely used, which can greatly reduce the friction and construction pressure of fracturing construction, thereby improving the effect of fracturing reconstruction. Drag reducer is the core additive of slick water, commonly used drag reducer can be divided into powder and emulsion in form. [0003] At present, the powder drag reducer in China has realized variable viscosity fracturing construction, that is, slick water, linear glue and jelly are prepared with the same chemical powder,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/608C09K8/665C09K8/685C09K8/882C09K8/885C09K8/887C09K2208/12C09K2208/26
Inventor 胡光闫秀王冰郝玉芬黄银胡泽文袁凯钟涛
Owner CHINA PETROCHEMICAL CORP
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