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Fracturing fluid of crosslinking association polymer and production method thereof

A technology of associative polymers and production methods, applied in the field of fracturing fluids, can solve problems such as pollution

Inactive Publication Date: 2017-04-26
XINJIANG ZHENGTONG OIL & GAS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a cross-linked associative polymer fracturing fluid and its production method, which overcomes the deficiencies of the prior art and can effectively solve the problem of the fracturing fluid in the prior art whose cross-linking agent is all metal ions on the oil layer. and the pollution of the ground environment

Method used

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  • Fracturing fluid of crosslinking association polymer and production method thereof
  • Fracturing fluid of crosslinking association polymer and production method thereof
  • Fracturing fluid of crosslinking association polymer and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1, the cross-linked associative polymer fracturing fluid, raw materials include 0.3 to 0.6 parts of associative polymer thickener, 0.5 to 2 parts of crosslinking agent, and 0.2 to 1 part of drainage aid in parts by weight. 0.05 to 0.5 parts of gel breaker, 0.1 to 1 part of clay stabilizer, and 94.9 to 98.85 parts of water.

Embodiment 2

[0024] Embodiment 2, the cross-linked association polymer fracturing fluid, raw materials include 0.3 or 0.6 parts of an association polymer thickener, 0.5 or 2 parts of a crosslinking agent, and 0.2 or 1 part of a drainage aid in parts by weight. 0.05 or 0.5 parts of gel breaker, 0.1 or 1 part of clay stabilizer, 94.9 or 98.85 parts of water.

Embodiment 3

[0025] Embodiment 3, the production method of the cross-linked associative polymer fracturing fluid is carried out as follows: the required amount of associative polymer thickener, clay stabilizer, drainage aid, cross-linking agent and breaker The glue is sequentially added to water to obtain a cross-linked associative polymer fracturing fluid. The cross-linked associative polymer fracturing fluid of the present invention obtained by this method uses a non-metallic cross-linking agent to cross-link the associated polymer molecules to form a medium-viscosity, low-friction, no-residue, non-corruptible, It is a clean cross-linked associative polymer fracturing fluid that is easy to break, and will not pollute the oil layer and ground environment.

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Abstract

The invention relates to the field of fracturing fluid technology and provides fracturing fluid of crosslinking association polymer and a production method thereof. The fracturing fluid of crosslinking association polymer is prepared from, by weight, 0.3 part - 0.6 part of association polymer thickening agent, 0.5 - 2 parts of crosslinking agent, 0.2 - 1 part of cleanup additive, 0.05 - 0.5 part of breaking agent, 0.1 - 1 part of clay stabilizer, 94.9 - 98.85 parts of water. According to the fracturing fluid of crosslinking association polymer, non-metallic crosslinking agent is used to crosslink association polymer molecules under neutral conditions to form clean fracturing fluid of crosslinking association polymer with moderate viscosity, low friction, no residue, imputrescibility, and easy breaking. The fracturing fluid of crosslinking association polymer not only is suitable for the mixture and dispersion of proppant, but also ensures the carrying effect of the proppant.

Description

technical field [0001] The invention relates to the technical field of fracturing fluid, and relates to a cross-linked association polymer fracturing fluid and a production method thereof. Background technique [0002] For oil well stimulation and water well injection, the common technological measure is to fracturing and acidizing oil and water wells. In the fracturing process, fracturing fluids are mainly divided into three categories: Oil-based fracturing fluid is characterized by being suitable for low-temperature, low-pressure, low-permeability and high-water-sensitivity oil layers. For example, Chinese Patent Publication No. CN1258709 discloses that a crosslinking agent is sodium aluminate, and the dispersion medium is diesel oil or light crude oil. The disadvantages of base fracturing fluids are: high cost; The cross-linking agent is aluminized, and the flowback fluid will pollute the oil layer and ground environment to a certain extent; High degree of constru...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/685C09K2208/12C09K2208/26
Inventor 李金霖何鹏贺建程德惠李彦林谢杰胡尚明王成君
Owner XINJIANG ZHENGTONG OIL & GAS CO LTD
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