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Friction-reducing agent of fracturing fluid and preparation method thereof

A technology of drag-reducing agent and fracturing fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high investment, affecting the cross-linking and temperature-resistant and shear-resistant properties of fracturing fluid, and achieve enhanced Good cross-linking performance and compatibility

Inactive Publication Date: 2011-04-06
中国石油化工股份有限公司西北油田分公司工程技术研究院 +1
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Problems solved by technology

[0004] At present, reducing the construction pressure of fracturing stimulation measures can also be done by increasing the fracturing fluid. However, since the addition of salts will affect the cross-linking and temperature and shear resistance of the fracturing fluid, and the investment is also very high, it must be Reduce the friction of the fracturing fluid system, so that the stimulation measures can be implemented smoothly

Method used

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  • Friction-reducing agent of fracturing fluid and preparation method thereof
  • Friction-reducing agent of fracturing fluid and preparation method thereof
  • Friction-reducing agent of fracturing fluid and preparation method thereof

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preparation example Construction

[0023] (1) Preparation example of fracturing fluid drag reducer

[0024] The composition ratio of fracturing fluid drag reducer is as follows:

[0025] Polyacrylamide 6kg

[0026] Polyvinyl alcohol 80kg

[0027] Surfactant 50kg

[0028] Ethanol 100kg

[0029] 764kg of water.

[0030] Polyacrylamide can be selected from Daqing Oilfield Petrochemical General Plant or products of the same molecular weight type;

[0031] Polyvinyl alcohol can be selected from the products of Sinopec Shanghai Petrochemical Co., Ltd., Dupont of Germany, and Celanese of the United States;

[0032] Surfactants are compatible with oilfield fracturing fluids;

[0033] The organic solvent can be selected from common commercially available ethanol.

[0034] Examples of fracturing fluid drag reducers are as follows:

[0035] ① Use 2m 3 Add 764kg of water to the reaction kettle according to the mass percentage; ② After heating to 60°C, slowly add 80kg of polyvinyl alcohol; ③Continuous stirring for ...

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Abstract

The invention relates to a friction-reducing agent of a fracturing fluid and a preparation method thereof, belonging to the field of oil field production increase. The friction-reducing agent of the fracturing fluid comprises the following components in percentage by weight: 0.6% of polyacrylamide, 8% of polyvinyl alcohol, 5% of surface active agents, 10% of organic solvents, and the balance of water. The friction-reducing agent of the fracturing fluid can effectively reduce the friction drag of the water-base fracturing fluid and has good compatibility with fracturing fluid additives.

Description

technical field [0001] The invention relates to a fracturing fluid additive, which belongs to the field of oil field stimulation, in particular to a fracturing fluid drag reducer and a preparation method thereof. Background technique [0002] Fracturing and acid fracturing are the main production stimulation measures for oil and gas field development. The fracturing fluid is the working fluid in the fracturing process. The fracturing fluid is pumped into the formation after being pressurized by the high-pressure pumping equipment, and the fractures are opened and extended in the formation. The general fracturing fluid is mainly composed of thickener, crosslinking agent and other additives compatible with the reservoir. Since the main purpose of fracturing fluid is to transport fracturing proppant and reduce fluid loss, crosslinking agent is usually used to form frozen Gel has better ability to carry proppant and lower fluid loss ability. However, due to the rapid increase ...

Claims

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Application Information

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IPC IPC(8): C09K8/62C09K8/68
Inventor 张烨耿宇迪赵文娜米强波唐汝众
Owner 中国石油化工股份有限公司西北油田分公司工程技术研究院
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