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A multi-component biocomposite oil displacement agent system and its injection process

A composite oil-displacing agent and biopolymer technology, which can be used in the fields of production fluids, drilling compositions, wellbore/well components, etc., and can solve the problems of large amount of surfactants, refractory polymers, and difficult sewage treatment. , to achieve the effect of increasing the swept volume, improving the recovery rate and low cost

Active Publication Date: 2019-09-27
DAQING HUALI ENERGY BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the chemical ASP flooding technology is a high-efficiency enhanced oil recovery technology developed in the tertiary oil recovery stage at home and abroad, but there are high-concentration alkali corrosion scaling, difficulty in demulsification, large amount of surfactant, high cost, and polymerization. Refractory substances and difficult sewage treatment

Method used

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  • A multi-component biocomposite oil displacement agent system and its injection process
  • A multi-component biocomposite oil displacement agent system and its injection process
  • A multi-component biocomposite oil displacement agent system and its injection process

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A multi-component biological composite oil displacement agent system of the present invention is composed of petroleum hydrocarbon degrading bacteria agent and biological composite oil displacement agent,

[0039] The petroleum hydrocarbon-degrading bacterial agent is prepared by uniformly mixing 1 part of petroleum hydrocarbon-degrading bacteria fermentation stock solution and 15 parts of nutrient solution;

[0040]The biocomposite oil displacement agent is composed of the following components by weight ratio: 5 parts of biopolymer bacterial fermentation stock solution, 10 parts of biological lipopeptide surfactant, 1 part of betaine, 60-80 parts of water, pH 8 is controlled, and the system Viscosity 47mpa s;

[0041] The nutrient solution is composed of 0.5 parts of a mixture of corn syrup and sucrose in a mass ratio of 3:1, 0.1 part of diammonium hydrogen phosphate, 0.1 part of sodium nitrate, 0.02 part of potassium humate, and 60 parts of water;

[0042] All the ab...

Embodiment 2

[0064] A multi-component biological composite oil displacement agent system of the present invention is composed of petroleum hydrocarbon degrading bacteria agent and biological composite oil displacement agent,

[0065] The petroleum hydrocarbon-degrading bacterial agent is prepared by uniformly mixing 5 parts of petroleum hydrocarbon-degrading bacteria fermentation stock solution and 20 parts of nutrient solution;

[0066] The biological composite oil displacement agent is composed of the following components by weight ratio: 10 parts of biopolymer bacteria fermentation stock solution, 20 parts of biological lipopeptide surfactant, 5 parts of betaine, 60 to 80 parts of water, pH 9 is controlled, and the system Viscosity 78mpa s;

[0067] The nutrient solution is composed of 5 parts of a mixture of corn syrup and sucrose in a mass ratio of 3:1, 0.5 parts of diammonium hydrogen phosphate, 0.5 parts of sodium nitrate, 0.05 parts of potassium humic acid, and 80 parts of water; ...

Embodiment 3

[0090] A multi-component biological composite oil displacement agent system of the present invention is composed of petroleum hydrocarbon degrading bacteria agent and biological composite oil displacement agent,

[0091] The petroleum hydrocarbon-degrading bacterial agent is prepared by uniformly mixing 3 parts of petroleum hydrocarbon-degrading bacteria fermentation stock solution and 18 parts of nutrient solution;

[0092] The biological composite oil displacement agent is composed of the following components by weight ratio: 8 parts of biopolymer bacteria fermentation stock solution, 15 parts of biological lipopeptide surfactant, 3 parts of betaine, 60-80 parts of water, and the pH is controlled at 8.5 , the system viscosity is 65mpa·s;

[0093] The nutrient solution is composed of 3 parts of a mixture of corn syrup and sucrose in a mass ratio of 3:1, 0.3 parts of diammonium hydrogen phosphate, 0.3 parts of sodium nitrate, 0.05 parts of potassium humic acid, and 70 parts of...

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Abstract

The invention provides a multicomponent biological compound oil displacement agent system and an injection technology thereof and relates to a reservoir oil displacement agent production method and an application method. The oil displacement system is composed of petroleum hydrocarbon bacterium degrading agent and a biological compound oil displacement agent. The injection process of the system comprises the steps that 0.2 pv of biological compound oil displacement agent is injected from a block water well injection station with an injection well and an extraction well as designated zones according to the requirements for injection allocation flow speed and injection allocation quantity and then replaces 0.1 pv of petroleum hydrocarbon bacterium degrading agent, 0.2 pv of biological compound oil displacement agent is replaced, 0.1 pv of petroleum hydrocarbon bacterium degrading agent is continuously injected, 0.2 pv of biological compound oil displacement agent is injected, and finally water displacement is adopted. The multicomponent biological compound oil displacement agent system is suitable for medium-low-permeability heavy oil reservoirs after water displacement, is low in cost and free of pollution and does not damage the oil reservoirs. By utilizing the system and the injection process, the produced air pressure can be up to 1.0 MP or above after 76 hours, the system is diluted to make the concentration reach 5-10%, interfacial tension is up to 5.2 * 10-3-8.2 * 10-3mN / m, the viscosity reduction rate to heavy oil with the viscosity of 10000 mpa.s is up to 85.7%, and physical simulation shows that the average recovery rate is up to 18.0% or above.

Description

technical field [0001] The invention relates to a production method and an application method of an oil-reservoir oil-displacement agent, in particular to a multi-component biological composite oil-displacement agent system and an injection process thereof. Background technique [0002] The petroleum industry is one of the pillar industries of our country's national economy and has a great impact on the development of our country's national economy. Oilfield exploitation has experienced primary oil recovery, secondary oil recovery and tertiary oil recovery. Tertiary oil recovery includes four types of technologies: thermal, chemical, miscible oil flooding, and microbial oil recovery. Among them, microbial oil recovery technology is low in cost and does not pollute the formation and the environment. Potential for enhanced recovery efficiency technologies. At present, the chemical ASP flooding technology is a high-efficiency enhanced oil recovery technology developed in the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/582C09K8/58E21B43/22
Inventor 李波沈玉江刘长宇王柱李国军谢云龙
Owner DAQING HUALI ENERGY BIOLOGICAL TECH
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