Oil displacement agent

A technology of oil-displacement agent and main agent, which is applied in the field of oil-displacement agent for tertiary oil recovery. It can solve problems such as formation blockage, harsh polymer flooding conditions, and damage to oil displacement rate, so as to save costs, increase oil recovery, and improve utilization. rate effect

Inactive Publication Date: 2011-11-09
陈新阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an oil displacement agent to solve the problems of alkali blockage and damage to the formation and low oil displacement rate in alkali flooding or binary flooding; at the same time, it also solves the problem that polymer flooding has strict requirements on formation conditions and needs to be matched. The difficulty of large-scale liquid distribution equipment; and it can be applied to low-permeability formations for oil displacement, without the need for huge equipment, and the existing water injection equipment can complete the injection work

Method used

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  • Oil displacement agent
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] raw material:

[0031] 30% hydrogen peroxide aqueous solution (hydrogen peroxide) 60g, water 40g

[0032] Usage method: mix 60g of 30% hydrogen peroxide aqueous solution (hydrogen peroxide) and 40g of water, stir, then dilute to a concentration of 1%, and inject into the water injection well.

[0033] Experimental results:

[0034]

Embodiment 2

[0036] raw material:

[0037] 0.25% concentration of chlorine peroxide (chlorine dioxide) aqueous solution 30g, alkylphenol polyoxyethylene ether 5g, water 65g

[0038] Usage method: Mix 30g of 0.25% chlorine peroxide (chlorine dioxide) aqueous solution, 5g of alkylphenol polyoxyethylene ether and 65g of water, stir, then dilute to a concentration of 5%, and inject into the water injection well.

[0039] Experimental results:

[0040]

[0041]

Embodiment 3

[0043] raw material:

[0044] Sodium permanganate 10g, 20% concentration of dodecyl dimethyl betaine 15g, water 75g

[0045] Usage method: Mix 10g of sodium permanganate, 15g of dodecyl dimethyl betaine at a concentration of 20% and 75g of water, stir, then dilute to a concentration of 2%, and inject into the water injection well.

[0046] Experimental results:

[0047]

[0048]

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PUM

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Abstract

The invention relates to an oil displacement agent for tertiary recovery, comprising 0.001-60wt% of oxidizing agent as a main agent, 0-5wt% of surfactant as an adjuvant, and the reminder consisting of water, wherein, all weight percents are based on the total weight of the composition. According to the invention, the oil production efficiency is greatly improved, the problems of block, damage, erosion and the like of stratum caused by alkaline in binary flooding or alkaline flooding are overcome, and the oil displacement agent is clean and safe and does not pollute the environment.

Description

technical field [0001] The invention relates to an oil-displacing agent, in particular to an oil-displacing agent for tertiary oil recovery. Background technique [0002] Most of my country's oil fields have entered the stage of tertiary oil recovery, which mainly uses chemical substances to improve the performance of oil, gas, water and rocks to extract more oil. Generally, polymer flooding is used to inject polymer-thickened water into the formation to enhance recovery. However, polymer injection flooding also has insurmountable defects: polymers have high requirements on water quality, and the content of calcium and magnesium ions in water directly affects the quality of polymer solution; During injection, it will be sheared by pipelines, oil pipes and blastholes, thereby reducing viscosity; polymers are also affected by temperature when used, generally requiring formation temperature not to exceed 70°C, and polymer flooding has strict requirements on formation condition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58
Inventor 陈新阳
Owner 陈新阳
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