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Gel fracturing fluid prepared from oilfield sewage and preparation method thereof

A technology for jelly fracturing fluid and oilfield sewage, applied in the field of fracturing fluid, can solve the problems of inability to meet the needs of on-site construction, abnormal viscosity and cross-linking of fracturing fluid, poor temperature resistance and shear resistance, etc. Liquid viscosity, improve water quality, improve the effect of temperature resistance and shear resistance

Inactive Publication Date: 2015-11-11
CHINA PETROLEUM & CHEM CORP +1
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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 jelly fracturing fluid prepared from oilfield sewage, which solves the problems that the existing fracturing fluid prepared from sewage has abnormal viscosity, crosslinking, poor temperature resistance and shear resistance, and cannot meet the needs of on-site construction.

Method used

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  • Gel fracturing fluid prepared from oilfield sewage and preparation method thereof
  • Gel fracturing fluid prepared from oilfield sewage and preparation method thereof
  • Gel fracturing fluid prepared from oilfield sewage and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] The jelly fracturing fluid that adopts the preparation of oil field sewage of the present embodiment comprises the following components by weight percentage: water quality conditioner 0.03%, isothiazolinone (bactericide) 0.2%, hydroxypropyl guar gum (thickener) 0.35%, organic boron crosslinking agent 0.4%, ammonium persulfate (gel breaker) 0.02%, and the balance is oilfield sewage.

[0035] Wherein, the water quality conditioner is a mixture of fumaric acid and disodium edetate with a mass ratio of 2:1; the organoboron crosslinking agent is purchased from Xinxiang City Xuantai Industrial Co., Ltd.

[0036] The preparation method of the jelly fracturing fluid prepared by using oilfield sewage in this embodiment comprises the following steps:

[0037] 1) Preparation of base liquid: Take oilfield sewage and put it in Wuyin mixer. Under stirring condition, slowly add water quality conditioner (mixture of fumaric acid and disodium edetate), iso Thiazolone and hydroxypropyl ...

Embodiment 2

[0041] The jelly fracturing fluid that adopts the preparation of oilfield sewage of the present embodiment comprises the following components by weight percentage: water quality conditioner 0.3%, glutaraldehyde (bactericide) 0.2%, hydroxypropyl guar gum (thickener) 0.45% %, organic boron crosslinking agent 0.5%, ammonium persulfate (gel breaker) 0.02%, and the balance is oilfield sewage.

[0042] Wherein, the water quality conditioner is a mixture of hydrochloric acid and disodium edetate with a mass ratio of 1:3; the organoboron crosslinking agent is purchased from Xinxiang City Xuantai Industrial Co., Ltd.

[0043] The preparation method of the jelly fracturing fluid prepared by using oilfield sewage in this embodiment comprises the following steps:

[0044] 1) Preparation of base liquid: take oilfield sewage and put it in Wuyin mixer, under stirring condition, slowly add water quality conditioner (mixture of hydrochloric acid and disodium edetate), glutaraldehyde, hydroxyl ...

Embodiment 3

[0048] The jelly fracturing fluid that adopts the preparation of oilfield sewage of the present embodiment comprises the following components by weight percentage: water quality conditioner 0.3%, glutaraldehyde (bactericide) 0.2%, carboxymethyl hydroxypropyl guar gum (thickened agent) 0.5%, organoboron crosslinking agent 0.5%, ammonium persulfate (gel breaker) 0.02%, and the balance is oilfield sewage.

[0049] Wherein, the water quality conditioner is a mixture of fumaric acid and disodium ethylenediaminetetraacetic acid in a mass ratio of 1:1; the organoboron crosslinking agent is purchased from Xinxiang City Xuantai Industrial Co., Ltd.

[0050] The preparation method of the jelly fracturing fluid prepared by using oilfield sewage in this embodiment comprises the following steps:

[0051] 1) Preparation of base liquid: take oilfield sewage and put it in Wuyin mixer, under stirring condition, slowly add water quality conditioner (mixture of fumaric acid and disodium ethylene...

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Abstract

The invention discloses a gel fracturing fluid prepared from oilfield sewage and a preparation method thereof. The gel fracturing fluid comprises the following components in percentage by weight: 0.01-1% of water quality regulator, 0.01-0.5% of bactericide, 0.1-0.8% of thickener, 0.1-0.5% of crosslinking agent, 0.01-0.5% of viscosity breaker and the balance of oilfield sewage. The gel fracturing fluid prepared from oilfield sewage has favorable temperature resistance and shear resistance, and satisfies the demands for on-site construction. The gel fracturing fluid prepared from oilfield sewage relieves the demands of hydraulic fracturing for water resources, and solves the problem of treatment of oilfield sewage. The gel fracturing fluid prepared from oilfield sewage has the advantages of favorable clay swelling resistance and low formation damage rate, thereby reducing the use of the antiswelling agent and saving the cost. The gel fracturing fluid prepared from oilfield sewage has wide formation application range, avoids damage to the formations which are sensitive to alkali, acid and the like, has favorable economic benefit and environmental benefit, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of fracturing fluid, in particular to a jelly fracturing fluid prepared from oilfield sewage, and also relates to a preparation method of the jelly fracturing fluid prepared from oilfield sewage. Background technique [0002] In the process of fracturing construction, the performance of fracturing fluid plays a vital role in increasing production and storage of oilfields. The water for fracturing fluid preparation is generally clear water, and the water consumption is relatively large. Due to the lack of water resources in Shanxi, Gansu and other regions, there are many problems in the preparation of fracturing fluids; The water content of crude oil is as high as 80% to 90%, and the treatment of oilfield sewage has become an increasingly serious problem. Sinopec's clear water and blue sky environmental protection plan requires zero discharge of oilfield sewage by 2015. If oilfield sewage can be used to prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/685C09K8/905C09K2208/12
Inventor 刘崇肖诚诚彭元东贾跃立蒋尔梁刘洪涛
Owner CHINA PETROLEUM & CHEM CORP
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