Profile controlling and flooding composition and application thereof

A composition and component technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance and salt resistance, low oil displacement efficiency, etc.

Inactive Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of poor temperature and salt resistance and low oil displacement efficiency under the high temperature, high

Method used

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  • Profile controlling and flooding composition and application thereof
  • Profile controlling and flooding composition and application thereof
  • Profile controlling and flooding composition and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The polymer microspheres of this embodiment are prepared by polymerizing an inverse emulsion under the action of a redox composite initiator; the inverse emulsion, in parts by weight, comprises the following components:

[0059] a) 50 parts of oil-soluble solvent; oil-soluble solvent is white oil;

[0060] b) 8 parts of emulsifier; the emulsifier HLB value is 6.7 (from Span 80 (ie sorbitan monooleate) HLB value 4.3; Tween 20 (polyoxyethylene (20EO) sorbitan monolauryl Ester) mixed with HLB value 16.7);

[0061] c) 30 parts of water-soluble monomer A; water-soluble monomer A is composed of 18 parts of acrylamide, 6 parts of sodium acrylate and 6 parts of 2-acrylamido-2-methylpropanesulfonate sodium;

[0062] d) 5 parts of temperature-resistant and salt-resistant monomer; the temperature-resistant and salt-resistant monomer is selected from oil-soluble temperature-resistant and salt-resistant monomer: octadecyl methacrylate;

[0063] e) 25 parts of water;

[0064] Wher...

Embodiment 2

[0121] The polymer microspheres of this embodiment are prepared by polymerizing an inverse emulsion under the action of a redox composite initiator; the inverse emulsion, in parts by weight, comprises the following components:

[0122] a) 50 parts of oil-soluble solvent; oil-soluble solvent is white oil;

[0123] b) 8 parts of emulsifier; the emulsifier HLB is 6.7 Span 40;

[0124] c) 30 parts of water-soluble monomer A; water-soluble monomer A is composed of 18 parts of acrylamide, 6 parts of sodium acrylate and 6 parts of 2-acrylamido-2-methylpropanesulfonate sodium;

[0125] d) 5 parts of temperature-resistant and salt-resistant monomer; the temperature-resistant and salt-resistant monomer is selected from oil-soluble temperature-resistant and salt-resistant monomer: octadecyl methacrylate;

[0126] e) 25 parts of water;

[0127] Wherein, the composite initiator, in terms of the above-mentioned total monomer weight percent, comprises the following components:

[0128] (a...

Embodiment 3

[0143] The polymer microspheres of this embodiment are prepared by polymerizing an inverse emulsion under the action of a redox composite initiator; the inverse emulsion, in parts by weight, comprises the following components:

[0144] a) 50 parts of oil-soluble solvent; oil-soluble solvent is white oil;

[0145] b) 8 parts of emulsifier; the emulsifier HLB value is 6.7 (from Span 80 (ie sorbitan monooleate) HLB value 4.3; Tween 20 (polyoxyethylene (20EO) sorbitan monolauryl Ester) mixed with HLB value 16.7);

[0146] c) 30 parts of water-soluble monomer A; water-soluble monomer A is composed of 18 parts of acrylamide, 6 parts of sodium acrylate and 6 parts of 2-acrylamido-2-methylpropanesulfonate sodium;

[0147] d) 5 parts of temperature-resistant and salt-resistant monomers; the temperature-resistant and salt-resistant monomers are selected from oil-soluble temperature-resistant and salt-resistant monomers: p-tert-butylstyrene;

[0148] e) 25 parts of water;

[0149] Whe...

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Abstract

The invention relates to a profile controlling and flooding composition of a high-temperature, high-salinity and low-permeability oil reservoir and application thereof in tertiary oil recovery of the high-temperature, high-salinity and low-permeability oil reservoir. The profile controlling and flooding composition aims at solving the problems that in the prior art, the heat resistant and salt resistant performance of an oil-displacing agent are poor and the flushing efficiency is low under the condition of the high-temperature, high-salinity and low-permeability oil reservoir. According to the technical scheme, the profile controlling and flooding composition of the high-temperature, high-salinity and low-permeability oil reservoir comprises, by weight, 0.01-3.0% of temperature and salt resistant polyacrylamide microspheres, 0.01-5.0% of anionic-nonionic surface active agent, and 92.0-99.98% of injected water, the problems are favorably solved, and the profile controlling and flooding composition can be used for on-spot application of oil recovery enhancement of deep profile controlling, water plugging, reservoir oil displacing and the like used in the tertiary oil recovery of the high-temperature, high-salinity and low-permeability oil reservoir.

Description

technical field [0001] The invention relates to a control-displacement composition and an application thereof, in particular to a control-displacement composition for a high-temperature, high-salt, low-permeability reservoir and its application in tertiary oil recovery of the high-temperature, high-salt and low-permeability reservoir. Background technique [0002] With the development of society and economy, people's demand for oil continues to increase and oil reserves decrease, and oil, as a non-renewable resource, is becoming more and more valuable. The first problem is: the contradiction between supply and demand is prominent, the demand for oil is increasing, and the number of new oil fields is less and less; the second is that there is still a large amount of crude oil left in the depleted oil reservoirs. Primary oil recovery (POR) can produce 10-25% of underground crude oil, and secondary oil recovery (SOR) can recover 15-25% of underground crude oil, that is, primary...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F220/18C08F212/12C08F226/10C08F2/32C09K8/584C09K8/588
CPCC09K8/584C09K8/588C08F2/32C08F220/56C08F220/06C08F220/585C08F220/1818C08F222/385C08F226/10C08F212/12
Inventor 宋晓芳夏燕敏苏智青
Owner CHINA PETROLEUM & CHEM CORP
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