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Biological enzyme oil displacement agent

A technology of biological enzymes and oil-displacing agents, which is applied in the field of petrochemical chemicals, can solve the problems of not paying attention to the geological characteristics of oil reservoirs and the physical properties of crude oil, etc. Effect

Inactive Publication Date: 2012-03-14
XIAN REJE BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing oil displacement agents usually only pursue ultra-low interfacial tension, and do not pay attention to the geological characteristics of the reservoir and the physical properties of crude oil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 18% biological enzyme, 6% polyoxyethylene ether, 5% alkyl glycoside, 4% diquaternary ammonium salt, and the balance of water. The above components are put into the liquid distribution tank in proportion, and injected into the formation by the injection pump through the injection pipeline.

Embodiment 2

[0019] Biological enzyme 15%, polyoxyethylene ether 5%, alkyl glycoside 0.5%, diquaternary ammonium salt 0.5%, water balance. The above components are put into the liquid distribution tank in proportion, and injected into the formation by the injection pump through the injection pipeline.

Embodiment 3

[0021] Biological enzyme 20%, polyoxyethylene ether 8%, alkyl glycoside 10%, diquaternary ammonium salt 8%, water balance. The above components are put into the liquid distribution tank in proportion, and injected into the formation by the injection pump through the injection pipeline.

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PUM

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Abstract

The invention discloses a biological enzyme oil displacement agent for improving the crude oil recovery ratio, which comprises the following ingredients through being metered in percentage by weight: 15 percent to 20 percent of biological enzyme, 5 percent to 8 percent of polyoxyethylene ether, 0.5 percent to 10 percent of alkyl glucoside, 0.5 percent to 8 percent of bis-ammonium salt and the balance of water. The biological enzyme oil displacement agent has the advantages that the water filling capability is efficiently improved, the sand carrying capability of crude oil is reduced, and the friction between fluid and sandstone is reduced, so the goals of stabilizing the oil pool structure and improving the crude oil recovery ratio are reached.

Description

technical field [0001] The invention belongs to the technical field of chemicals used in petrochemical industry, and in particular relates to a bio-enzyme oil displacement agent for enhancing crude oil recovery. Background technique [0002] At present, in the process of oilfield development, the primary oil recovery is the process of crude oil being sprayed out of the ground through the oil well by relying on the underground pressure. With the decrease of the underground pressure, the self-spraying ends, and the primary oil recovery can recover about 10-15% of the underground. Secondary oil recovery is to replenish underground energy by continuously injecting water into the ground, so as to achieve the purpose of water flooding. However, with continuous water injection, the water content in the produced fluid continues to rise. At present, the water content in the produced fluid of my country's onshore oilfields is as high as 92-95%. According to international standards, w...

Claims

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Application Information

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IPC IPC(8): C09K8/58
Inventor 陈富林
Owner XIAN REJE BIOLOGICAL TECH
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