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Regulation and control method for indigenous microorganism oil displacement

An endogenous microorganism, oil displacement technology, applied in chemical instruments and methods, earthwork drilling, drilling composition and other directions, can solve the problem of inability to accurately predict when to adjust the activator formula, shortening the validity period of endogenous microorganism oil displacement, Affecting the effect of technical on-site implementation and other issues, to achieve the effect of extending the validity period of implementation, clear control thinking, pertinence and operability

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the endogenous microbial flooding technology lacks clear and quantitative biological key indicators to indicate the timing of regulation. It simply indicates when to add nutrients based on community growth and metabolism indicators such as bacterial concentration and metabolite concentration, and cannot accurately predict when to adjust activators. Formula, this problem leads to the shortening of the effective period of endogenous microbial flooding, and the lack of accuracy, pertinence and timeliness of on-site regulation, which seriously affects the field implementation effect of this technology

Method used

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  • Regulation and control method for indigenous microorganism oil displacement
  • Regulation and control method for indigenous microorganism oil displacement
  • Regulation and control method for indigenous microorganism oil displacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The reservoir temperature of A1 in a certain block of Shengli Oilfield is 65°C, the porosity is 35%, and the average permeability is 1200×10 -3 μm 2 , the surface crude oil viscosity is 2130mPa·s, the salinity is 12000mg / L, and the geological reserves are 5.0×10 6 t, the recovery degree of the block before the test is 35%, and the water content is 98%.

[0041] A control method for endogenous microbial flooding, comprising the following steps:

[0042] (1) Screening of regulatory biological indicators;

[0043] (2) The value of the key biological indicators of the timing of the regulation of the target block;

[0044] (3) On-site implementation and regulation.

[0045] Further, step (1) specifically includes the following steps:

[0046] (11) Simulate the conditions of reservoir A1 in the target block, and carry out long core continuous displacement tests in the laboratory;

[0047] (12) Detect the biological indicators and production indicators of the expelled fl...

Embodiment 2

[0069] The reservoir temperature of a block A2 in Shengli Oilfield is 60°C, the porosity is 32%, and the average permeability is 830×10 -3 μm 2 , the surface crude oil viscosity is 2851mPa·s, the salinity is 18301mg / L, and the geological reserves are 3.2×10 5 t, the recovery degree of the block before the test is 28%, and the water content is 96%.

[0070] A control method for endogenous microbial flooding, comprising the following steps:

[0071] (1) Screening of regulatory biological indicators;

[0072] (2) The value of the key biological indicators of the timing of the regulation of the target block;

[0073] (3) On-site implementation and regulation.

[0074] Further, step (1) specifically includes the following steps:

[0075] (11) Simulate the conditions of the A2 reservoir in the target block, and carry out the long core continuous displacement test indoors;

[0076] (12) Detect the biological indicators and production indicators of the expelled fluid at the outp...

Embodiment 3

[0098] The reservoir temperature of A3 in a certain block of Shengli Oilfield is 68℃, the porosity is 28%, and the average permeability is 780×10 -3 μm 2 , the surface crude oil viscosity is 990mPa·s, the salinity is 18000mg / L, and the geological reserves are 1.8×10 6 t, the recovery degree of the block before the test is 39%, and the water content is 98%.

[0099] A control method for endogenous microbial flooding, comprising the following steps:

[0100] (1) Screening of regulatory biological indicators;

[0101] (2) The value of the key biological indicators of the timing of the regulation of the target block;

[0102] (3) On-site implementation and regulation.

[0103] Further, step (1) specifically includes the following steps:

[0104] (11) Simulate the A3 condition of the reservoir in the target block, and carry out the long core continuous displacement test indoors;

[0105] (12) Detect the biological indicators and production indicators of the expelled fluid at ...

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Abstract

The invention belongs to the technical field of indigenous microorganism oil displacement, and particularly relates to a regulation and control method for indigenous microorganism oil displacement. The invention discloses a regulation and control method for indigenous microorganism oil displacement. The regulation and control method comprises the following steps: (1) screening regulation and control biological indexes; (2) key biological index values of regulation and control opportunities of the target block are obtained; and (3) on-site implementation and regulation. Compared with the prior art, the regulation and control method for indigenous microorganism oil displacement has the following advantages and beneficial effects that (1) the regulation and control index is clear, the regulation and control thought is clear, the process is simple, and the pertinence and operability are high; and (2) the regulation and control time is predicted in advance, the components of the activating agent are adjusted in time, efficient activation of endogenous oil displacement functional flora is maintained, the enforcement validity period of endogenous microorganism oil displacement is prolonged, and the recovery rate is further increased to 3.5% or above.

Description

technical field [0001] The invention belongs to the technical field of oil displacement by endogenous microorganisms, and in particular relates to a control method for oil displacement by endogenous microorganisms. Background technique [0002] Endogenous microbial oil flooding technology is to activate the oil-displacement functional bacteria inside the reservoir by injecting activators into the formation, and the activated oil-displacement functional bacteria and their active metabolites interact with crude oil to improve oil recovery. yield. [0003] The oil-displacement functional bacteria are generally considered to be biosurfactant-producing bacteria, emulsifier-producing bacteria, hydrocarbonophilic bacteria and methanogenic archaea. The directional activation of these oil-displacement functional bacteria is the key to effective microbial oil displacement. [0004] Before the implementation of endogenous microbial flooding technology, the concentration of oil-displac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22E21B43/20C09K8/582
CPCE21B43/16E21B43/20C09K8/582
Inventor 束青林胡婧孙刚正吴晓玲郭辽原刘涛冯云谭晓明宋永亭王静
Owner CHINA PETROLEUM & CHEM CORP
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