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A method for oil well microbial combined huff and puff recovery

A microbiological and oil well technology, applied in the field of petroleum exploitation, can solve the problems of slow growth metabolism and affecting the effect of throughput and oil increase, and achieve the effect of simple process, good oil increase effect and long effective period

Active Publication Date: 2019-08-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the growth and metabolic rate of hydrocarbonophilic microorganisms using crude oil as a carbon source is slow, which affects the effect of throughput and oil increase

Method used

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  • A method for oil well microbial combined huff and puff recovery
  • A method for oil well microbial combined huff and puff recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Overview of the test oil well: Well R in a certain block of Shengli Oilfield 12 The thickness of the oil layer is 5.0m, the oil well temperature is 67℃, the reservoir pressure is 12.2MPa, the salinity is 5682mg / L, and the permeability is 650×10 -3 μm 2 , the porosity is 32.6%, the crude oil viscosity is 2650mPa·s, and the daily fluid production of the oil well is 60m 3 / d, moisture content 93.5%. Utilize the method of the present invention to implement the present invention in this oil well, concrete steps are as follows:

[0044] (1) Screening of test wells

[0045] The reservoir temperature of the test oil well is 50×10 -3 μm 2 1. The viscosity of crude oil is less than 3000mPa·s, meeting the screening criteria for oil wells of the present invention.

[0046] (2) Screening of exogenous bacteria

[0047] The specific screening methods for exogenous bacteria are as follows:

[0048] ① Activate the spare hydrocarbon oxidizing bacteria and methanogenic bacteria, a...

Embodiment 2

[0077] Overview of the test oil well: Well H in a certain block of Shengli Oilfield 23 The thickness of the oil layer is 4.5m, the oil well temperature is 72°C, the reservoir pressure is 9.3MPa, the salinity is 3285mg / L, and the permeability is 780×10 -3 μm 2 , the porosity is 33.2%, the crude oil viscosity is 1680mPa·s, and the daily fluid production of the oil well is 90m 3 / d, moisture content 96.8%. Utilize the method of the present invention to implement the present invention in this oil well, concrete steps are as follows:

[0078] (1) Screening of test wells

[0079] The reservoir temperature of the test oil well is 50×10 -3 μm 2 1. The viscosity of crude oil is less than 3000mPa·s, meeting the screening criteria for oil wells of the present invention.

[0080] (2) Screening of exogenous bacteria

[0081] ① Activate the spare hydrocarbon oxidizing bacteria and methanogenic bacteria, and then cultivate the hydrocarbon oxidizing bacteria and methanogenic bacteria i...

Embodiment 3

[0110]Overview of the test oil well: Oil well L in a certain block of Shengli Oilfield 5 The thickness of the oil layer is 3.8m, the oil well temperature is 56℃, the reservoir pressure is 13.9MPa, the salinity is 12565mg / L, and the permeability is 980×10 -3 μm 2 , the porosity is 33.5%, the crude oil viscosity is 1260mPa·s, and the daily fluid production of the oil well is 120m 3 / d, moisture content 98.2%. Utilize the method of the present invention to implement the present invention in this oil well, concrete steps are as follows:

[0111] (1) Screening of test wells

[0112] The reservoir temperature of the test oil well is 50×10 -3 μm 2 1. The viscosity of crude oil is less than 3000mPa·s, meeting the screening criteria for oil wells of the present invention.

[0113] (2) Screening of exogenous bacteria

[0114] ① Activate the spare hydrocarbon oxidizing bacteria and methanogenic bacteria, and then cultivate the hydrocarbon oxidizing bacteria and methanogenic bacter...

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Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to a method of oil well microorganism composite huff and puff oil recovery. The method specifically comprisesthe following steps that a test oil well is screened; an exogenous microbe is screened; a biological surface active agent is screened; fermentation production is conducted on the exogenous microbe; composition is conducted on an activating agent, the biological surface active agent and exogenous microbe fermentation broth; and field test is conducted. The method has the characteristics that the oil deposit application range is wide, the technology is simple, the situations of oil well sanding and damage of a sleeve pipe are avoided, and the oil well use ratio is high; injection of the exogenous microbe cannot damage the stratum and pollute the environment; the oil well yield is improved by utilizing the comprehensive effect of the exogenous microbe and the biological surface active agent,the validity period is long, the validity period is longer than 12 months, the oil production increasing is good, the daily oil production increasing of a single well exceeds 5 t, and the input-output ratio is larger than 1:3.0. Thus, the method can be widely applied to microorganism single well treatment.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a method for oil well microbial composite huff and puff recovery. Background technique [0002] Microbial huff and puff oil recovery technology refers to squeezing specific microorganisms and nutrients into the formation through the wellbore of the oil well, and then using the growth and metabolism of microorganisms to act on the reservoir and crude oil, so as to achieve the purpose of increasing crude oil production. This technology has the advantages of simple construction and low investment. , quick effect, and no damage to the reservoir. Therefore, this technology has been applied in a large number of oil wells in oil fields at home and abroad. It has been reported that more than 500 oil wells have been applied in Daqing Oilfield, and a good increase in oil production has been achieved. [0003] The adaptability of the microbes injected into the res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22C12N1/00C09K8/582
Inventor 林军章丁明山汤晓东王静冯云胡婧宋欣段传慧谭晓明巴燕孙刚正曹嫣镔
Owner CHINA PETROLEUM & CHEM CORP
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