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Cross-linking agent, hydroxypropyl guanidine gum fracturing fluid system and preparation method of hydroxypropyl guanidine gum fracturing fluid system

A technology of hydroxypropyl guar gum and cross-linking agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve the problems of not having both fracturing performance and small formation damage

Inactive Publication Date: 2015-11-18
CHINA SHENHUA ENERGY CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a cross-linking agent, hydroxypropyl guar gum fracturing fluid system and its preparation method, to solve the problem that the existing hydroxypropyl fracturing fluid system cannot have both good fracturing performance and the formation small damage problem

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  • Cross-linking agent, hydroxypropyl guanidine gum fracturing fluid system and preparation method of hydroxypropyl guanidine gum fracturing fluid system
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  • Cross-linking agent, hydroxypropyl guanidine gum fracturing fluid system and preparation method of hydroxypropyl guanidine gum fracturing fluid system

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preparation example Construction

[0038] Another aspect of the present invention provides a method for preparing a hydroxypropyl guar gum fracturing fluid system, the preparation method comprising: preparing component A: borate, alkanolamine, the first inorganic solvent and an acidic pH regulator Mix to obtain component A; prepare component B: component B includes an alkaline pH regulator; prepare a fracturing fluid system: mix component A and hydroxypropyl guar gum in a weight ratio of 2 to 3:4 to obtain Mixed solution; then, according to the weight ratio of component A and component B of 2:7 to 1:5, mix the mixed solution with component B to obtain the above-mentioned hydroxypropyl guar gum fracturing fluid system.

[0039] The borate in component A and the alkanolamine containing hydroxyl can undergo a coordination reaction to form a coordination compound with a ring structure. The complex has strong stability, which is beneficial to improve the heat resistance, shear recovery and conductivity of the crossl...

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Abstract

The invention provides a cross-linking agent, a hydroxypropyl guanidine gum fracturing fluid system and a preparation method of the hydroxypropyl guanidine gum fracturing fluid system. The cross-linking agent comprises an A component and a B component, wherein the A component comprises borate, alkyl alkylol amine, a first organic solvent, a first inorganic solvent and an acidic pH modifier; the B component comprises an alkaline pH modifier; the weight ratio of the A component to the B component is (2: 7)-(1: 5). The cross-linking agent provided by the invention is adopted to prepare the fracturing fluid system, so that the formation damage is reduced, the cost of a fracturing fluid is reduced, the fracturing effect is improved, besides, the concentration of a thickening agent is decreased, and the fracturing fluid property is guaranteed.

Description

technical field [0001] The invention relates to the field of oil and gas field exploitation, in particular to a crosslinking agent, hydroxypropyl guaridine fracturing fluid system and a preparation method thereof. Background technique [0002] Due to the increasing demand for energy in economic development, the effective development of low-permeability reservoirs has become an important task for oil and gas production. As an effective production stimulation measure, fracturing accounts for an increasing proportion in the development of oil and gas fields. Fracturing fluid is the liquid used in the mining process of fluid mines (gas, gas, oil, fresh water, brine, hot water, etc.) in order to obtain high yield and borrow liquid conduction force (such as hydraulic power, etc.) for fracturing measures. In order to effectively improve the stimulation effect of fracturing, improve the productivity of oil and gas wells and the recovery rate of oilfields, the selection of fracturin...

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/685C09K8/90
Inventor 王延忠马俯波王衍林中月于鹏宋扬史志芳
Owner CHINA SHENHUA ENERGY CO LTD
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