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Oil displacement agent

A technology of oil displacement agent and auxiliary agent, applied in the field of oil displacement agent, can solve problems such as difficulty in exploitation and damage to formation structure, and achieve the effect of small usage and low cost

Inactive Publication Date: 2014-07-09
TIANJIN ZHENGFANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, surfactants and microbial oil recovery are widely used in tertiary oil recovery research, and surface active flooding shows obvious advantages. At the same time, a certain amount of alkali or polymer is added to it. The addition of alkali or polymer can reduce the interfacial tension of oil and water. However, due to the large amount of alkali or polymer being adsorbed in the formation, the pores of the formation are blocked and the formation structure is destroyed. , which brings great difficulties to further mining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Preparation of oil displacing agent: Add 40% sulfonate, 20% fatty alcohol polyoxyethylene ether, 10% polyacrylamide, 6% ethanol to the reactor, and the rest is water, and raise the temperature of the reactor to 50 ℃, keeping the reaction temperature, stirring continuously for 1 hour, to obtain the oil displacing agent.

[0016] The total weight of the oil-displacing agent is 0.6%, the oil-water system is Guliu crude oil and mineralized water, the side-view instrument is the TM-500 tensiometer of Bauwell Company, the test temperature is 70°C, the rotation speed is 5000 rpm, the interfacial tension Up to 6×10 -5 mN·m -1 , can reach the minimum within 7 minutes.

Embodiment 2

[0018] Preparation of oil displacing agent: Add 60% of sulfonate, 30% of fatty alcohol polyoxyethylene ether, 5% of polyacrylamide, 3% of ethanol in the reactor, and the rest is water, raise the temperature of the reactor to 70 ℃, keep the reaction temperature, and stir continuously for 3 hours to obtain the oil displacing agent.

[0019] The total weight of the oil-displacing agent is 0.4%, the oil-water system is Guliu crude oil and mineralized water, the side-view instrument is the TM-500 tensiometer of Bauwell Company, the test temperature is 70°C, the rotation speed is 5000 rpm, the interfacial tension Up to 6×10 -5 mN·m -1 , can reach the minimum within 5 minutes.

Embodiment 3

[0021] Preparation of oil displacing agent: Add 70% of sulfonate, 20% of fatty alcohol polyoxyethylene ether, 15% of polyacrylamide, 3% of ethanol to the reactor, and the rest is water. Raise the temperature of the reactor to 60 ℃, keep the reaction temperature, and stir continuously for 2 hours to obtain the oil displacing agent.

[0022] The total weight of the oil-displacing agent is 0.4%, the oil-water system is Guliu crude oil and mineralized water, the side-view instrument is the TM-500 tensiometer of Bauwell Company, the test temperature is 70°C, the rotation speed is 5000 rpm, the interfacial tension Up to 6×10 -5 mN·m -1 , can reach the minimum within 9 minutes.

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PUM

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Abstract

A provided oil displacement agent is prepared by compounding the following compositions: a) petroleum sulfonates accounting for 30%-70% of the total mass; b) a surfactant auxiliary agent accounting for 20%-30% of the total mass; c) a surfactant synergist accounting for 5%-15% of the total mass; and d) a surfactant solubilizer accounting for 3%-10% of the total mass. The beneficial effects comprise that the oil displacement agent is not added with alkalis, the production process does not pollute environment, the usage amount is 0.4%-0.6%, and the oil displacement agent is small in usage amount and low in cost.

Description

technical field [0001] The invention relates to the field of chemical additives in tertiary oil recovery, in particular to an oil displacement agent. Background technique [0002] The rational development and utilization of petroleum energy has attracted great attention. Because the total oil recovery rate of conventional primary and secondary oil recovery is not very high, it can only reach 20% to 40% generally, and the highest can reach 50%, and 50% to 80% of crude oil cannot be recovered. Therefore, in the situation of increasingly tense energy sources, enhancing oil recovery has become a major topic in oil exploration research, and tertiary oil recovery is a particularly effective method for improving oil recovery. [0003] At present, surfactants and microbial oil recovery are widely used in tertiary oil recovery research, and surface active flooding shows obvious advantages. At the same time, a certain amount of alkali or polymer is added to it. The addition of alkal...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 金书华陈欣
Owner TIANJIN ZHENGFANG TECH DEV