Oil-displacing agent prepared from fracturing fluid flow-back liquid and preparation method of oil-displacing agent

A flowback fluid and fracturing fluid technology, applied in chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of high water treatment costs, environmental hazards, etc., to improve interfacial tension, increase the Humidity, maintain a stable effect

Inactive Publication Date: 2018-03-23
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an oil displacement agent prepared by fracturing fluid flowback fluid, which solves the problem that in the prior art, the fracturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An oil displacing agent prepared from fracturing fluid flowback liquid, the preparation raw materials of which are composed of the following components in parts by weight: 92 parts of fracturing fluid flowback liquid, 2 parts of subtilisin sodium, lauroyl hydrolyzed silk sodium 4 parts, 1 part of polyisobutylene succinimide, 0.5 part of hydrocarbyl sulfate, 0.5 part of polyene polyamine carboxylate.

[0026] Specifically follow the steps below:

[0027] Step 1, weighing 92 parts of fracturing fluid flowback liquid, 2 parts of lipopeptide sodium subtilis, 4 parts of lauroyl hydrolyzed silk sodium, 1 part of polyisobutylene succinimide, 0.5 parts of hydrocarbyl sulfate, 0.5 part of polyene polyamine carboxylate, for subsequent use;

[0028] Step 2, naturally settling and filtering the fracturing fluid flowback liquid weighed in step 1 in sequence to obtain a filtrate;

[0029] Adding a mass concentration of 10% sodium hydroxide solution to the filtrate to adjust the pH ...

Embodiment 2

[0034] An oil displacing agent prepared from fracturing fluid flowback liquid, the preparation raw materials of which are composed of the following components in parts by weight: 90 parts of fracturing fluid flowback liquid, 1 part of subtilisin sodium, lauroyl hydrolyzed silk sodium 3 parts, 0.5 parts of polyisobutylene succinimide, 0.5 parts of hydrocarbyl sulfate, and 0.5 parts of polyene polyamine phosphate.

[0035] Specifically follow the steps below:

[0036] Step 1, weighing 90 parts of fracturing fluid flowback liquid, 1 part of lipopeptide sodium subtilis, 3 parts of lauroyl hydrolyzed silk sodium, 0.5 part of polyisobutylene succinimide, 0.5 part of hydrocarbyl sulfate, 0.5 part of polyene polyamine phosphate, for subsequent use;

[0037] Step 2, naturally settling and filtering the fracturing fluid flowback liquid weighed in step 1 in sequence to obtain a filtrate;

[0038] Adding a mass concentration of 10% sodium hydroxide solution to the filtrate to adjust the...

Embodiment 3

[0043] An oil displacing agent prepared from fracturing fluid flowback liquid, the preparation raw materials of which are composed of the following components in parts by weight: 95 parts of fracturing fluid flowback liquid, 1.5 parts of subtilisin sodium, lauroyl hydrolyzed silk sodium 5 parts, 0.5 parts of polyisobutylene succinimide, 1 part of hydrocarbyl sulfate, and 1 part of polyene polyamine carboxylate.

[0044] Specifically follow the steps below:

[0045] Step 1, weighing 95 parts of fracturing fluid flowback liquid, 1.5 parts of lipopeptide sodium subtilis, 5 parts of lauroyl hydrolyzed silk sodium, 0.5 part of polyisobutylene succinimide, 1 part of hydrocarbyl sulfate, 1 part of polyene polyamine carboxylate, spare;

[0046] Step 2, naturally settling and filtering the fracturing fluid flowback liquid weighed in step 1 in sequence to obtain a filtrate;

[0047] Adding a mass concentration of 10% sodium hydroxide solution to the filtrate to adjust the pH value of th...

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PUM

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Abstract

The invention discloses an oil-displacing agent prepared from fracturing fluid flow-back liquid. The oil-displacing agent comprises, by weight, 90-95 parts of the fracturing fluid flow-back liquid, 1-2 parts of bacillus subtilis lipopeptide sodium, 3-5 parts of lauroyl hydrolyzing silk sodium, 0.5-1 part of polyisobutylene succinimide, 0.5-1 part of synergists and 0.5-1 part of chelating agents. The invention further discloses a preparation method of the oil-displacing agent made from the fracturing fluid flow-back liquid. The oil-displacing agent has the advantages that the fracturing fluid flow-back liquid serves as base liquid, and functional components are added for mutual matching to obtain the oil-displacing agent with good performance; the oil-displacing agent can be applied to exploitation of high water content, hyposmosis, thickened-oil, high temperature and high salt type oil reservoirs, and oil displacement efficiency, conformance factor and recovery ratio can be increased;the fracturing fluid flow-back liquid serving as base liquid can be applied to preparation of the oil-displacing agent after slight treatment, so that the raw material cost of the oil-displacing agentis reduced, and environmental pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development engineering, and in particular relates to an oil displacement agent prepared from fracturing fluid flowback fluid and a preparation method thereof. Background technique [0002] With the improvement of oilfield exploration and development technology, the development of low-permeability oil and gas resources is increasing. Low-permeability reservoirs have become the main battlefield of oil development and occupy an important strategic position in the exploration and development of oil and gas fields in my country. However, low-permeability reservoirs have low permeability, poor physical properties, and complex pore-throat structure. Therefore, during the development process, the natural productivity is low, the production declines rapidly, the water absorption capacity of the water injection well is poor, the water injection pressure is high, and even the phenomenon of "injecti...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/588C09K8/60E21B43/22
CPCC09K8/584C09K8/588C09K8/602E21B43/16
Inventor 陈世军郭军杨继刚夏晓冬刘宝伟穆凯
Owner XI'AN PETROLEUM UNIVERSITY
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