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Nutritional agent suitable for activating endogenous oil displacement microbes and application of nutritional agent

A technology for oil-displacing microorganisms and nutrients, applied in microorganisms, microorganisms, biochemical equipment and methods, etc., can solve the problems of complex chemical composition, affecting the quality and purity of oil products, poor compatibility, etc. The effect of water flooding efficiency

Active Publication Date: 2018-10-19
DAQING HUALI ENERGY BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing microbial nutrients have poor compatibility with endogenous oil displacement microorganisms and have complex chemical components. If they are mixed with crude oil, the quality and purity of the oil will be affected.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A nutritional agent suitable for activating endogenous oil-displacement microorganisms according to the present invention. 1L of the nutritional agent includes the following ingredients: 4.5g of sucrose, 10.0g of corn steep liquor dry powder, 1.5g of yeast powder, 5.0g of sodium nitrate, and 3.0 g of diammonium hydrogen phosphate. g. 0.2g of lipopeptide biosurfactant, 1.0g of liquid starch, and the remaining water are injected into the 87mD saturated oil core together with the production fluid. The nutrient injection amount is 0.1PV, and the core is closed for 3 days. This method improves crude oil recovery. The yield is 8%, and the number of microorganisms is increased by 10 2 Individuals / mL increased to 10 8 individual / mL.

Embodiment 2

[0016] A kind of nutrient agent suitable for activating endogenous oil-displacement microorganisms of the present invention, 1L nutrient agent includes the following ingredients: 2.5g of sucrose, 20.0g of corn steep liquor dry powder, 0.5g of yeast powder, 2.0g of sodium nitrate, 1.0 g of diammonium hydrogen phosphate g. 0.05g of lipopeptide biosurfactant, 3.0g of liquid starch, and the remaining water are injected into the 84mD saturated oil core together with the production fluid. The nutrient injection amount is 0.05PV, and the core is closed for 3 days. This method improves crude oil recovery. The yield was 7.5%, and the number of microorganisms was increased by 10 2 Individuals / mL increased to 10 8 individual / mL.

Embodiment 3

[0018] A nutritional agent suitable for activating endogenous oil-displacement microorganisms according to the present invention. 1 L of nutritional agent includes the following ingredients: 3.0 g of sucrose, 15.5 g of corn steep liquor dry powder, 0.7 g of yeast powder, 2.5 g of sodium nitrate, and 2.5 g of diammonium hydrogen phosphate. g. 0.1g of lipopeptide biosurfactant, 2.0g of liquid starch, and the remaining water are injected into the 120mD saturated oil core together with the production fluid. The nutrient injection amount is 0.3PV, and the core is closed for 3 days. This method improves crude oil recovery. The yield was 8.6%, and the number of microorganisms was increased by 10 2 Individuals / mL increased to 10 8 individual / mL.

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Abstract

The invention discloses a nutritional agent suitable for activating endogenous oil displacement microbes, and relates to the technical field of oil exploitation aids. The nutritional agent is preparedfrom the following components in parts by weight: 10.0 to 20.0 parts of a dried corn steep liquor powder, 0.5 to 1.5 parts of a yeast powder, 2.0 to 5.0 parts of sodium nitrate, 2.5 to 4.5 parts of saccharose, 1.0 to 3.0 parts of diammonium hydrogen phosphate, 0.05 to 0.2 part of a lipopeptide biosurfactant, 1.0 to 3.0 parts of liquid starch and 800 to 1500 parts of water. According to the nutritional agent disclosed by the invention, by increasing the quantity of the endogenous oil displacement microbes, oil recovery is enhanced; the endogenous microbes are enabled to produce metabolites inthe reservoir in situ, and the metabolites are concentrated on the oil-water interface for taking effect; beneficial microbes in the reservoir are regulated and controlled and selectively activated byinjecting different activators; the waterflood efficiency is improved by utilizing the migration, propagation and metabolism of the beneficial microbes and the interaction between metabolites and crude oil rock water; when the activators enter a high permeability zone along with injected water, the endogenous microbes in the high permeability zone can be activated, so that the concentration of endogenous bacteria is increased to achieve a water shut-off and profile control effect.

Description

technical field [0001] The invention relates to the technical field of oil recovery aids, in particular to a nutrient suitable for activating endogenous oil-displacement microorganisms. Background technique [0002] Microbial flooding technology refers to the injection of functional microorganisms and nutrients into the well, and the use of microorganisms to multiply at the oil-water interface under reservoir conditions to produce surface active substances and biogas, thereby increasing the fluidity of crude oil and changing the wettability of rock surfaces. It is a technology to strip the oil film from the rock surface, dredge the seepage channel, and displace the residual oil to increase the production. However, the existing microbial nutrients have poor compatibility with endogenous oil-displacement microorganisms and complex chemical components. If they are mixed with crude oil, the quality and purity of the oil will be affected. Contents of the invention [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/00C09K8/582
CPCC09K8/582C12N1/00
Inventor 李波王强刘长宇李国军王柱
Owner DAQING HUALI ENERGY BIOLOGICAL TECH
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