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A control method for the originalization of reservoirs with functional bacteria in emulsification flooding

A technology of emulsifying functional and functional bacteria, which is applied in earth-moving drilling, fluid production, wellbore/well parts, etc. Incomplete microbial community structure and other problems, to achieve the effect of clear regulation ideas, broaden application, and improve pertinence

Active Publication Date: 2018-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have found that the structure of the oil displacement microbial community in some oil reservoirs is not complete, and there is a lack of endogenous bacteria with the function of emulsification oil displacement. The existing technology can only activate other types of endogenous bacteria in the reservoir, and the potential of endogenous microorganisms It cannot be fully utilized, and the oil displacement effect is not significant, so this type of oil reservoir cannot be used as the target oil reservoir for the implementation of endogenous microbial oil flooding technology, thus limiting the application of endogenous microbial oil flooding technology

Method used

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  • A control method for the originalization of reservoirs with functional bacteria in emulsification flooding
  • A control method for the originalization of reservoirs with functional bacteria in emulsification flooding
  • A control method for the originalization of reservoirs with functional bacteria in emulsification flooding

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Experimental program
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Effect test

Embodiment 1

[0028] Shengli Oilfield Block A 1 , the burial depth is 1032-1150m, the reservoir temperature is 65℃, the permeability variation coefficient is 0.518, and the reservoir permeability is 790×10 -3 μm 2 , the viscosity of crude oil is 220mPa.s, the degree of recovery is 46.0%, and the oil-bearing area of ​​the test area is 0.82km 2 , effective thickness 10.2m, geological reserves 12.5×10 4 t.

[0029] 1. Screening of target reservoirs

[0030] Drain 5L of formation water before collecting target oil reservoir samples on site, fully replace the air in the sterile sampler with sterile nitrogen, and then obtain 1.0L of formation water samples; carry out endogenous microbial activation and emulsification experiments within 10 hours, and pour them into the Erlenmeyer flask After adding the formation water sample, add a mass concentration of 0.4% glucose, a mass concentration of 0.2% peptone, an organic activator with a mass concentration of 0.02% dipotassium hydrogen phosphate, an...

Embodiment 2

[0053] Shengli Oilfield Block H 3 , the burial depth is 890-990m, the reservoir temperature is 43℃, the permeability variation coefficient is 0.73, and the reservoir permeability is 1250×10 -3 μm 2 , the viscosity of crude oil is 985mPa.s, the degree of recovery is 41.0%, and the oil-bearing area of ​​the test area is 3.82km 2 , effective thickness 8.2m, geological reserves 9.6×10 4 t.

[0054] 1. Screening of target reservoirs

[0055] Drain 8L of formation water before collecting target oil reservoir samples on site, fully replace the air in the sterile sampler with sterile nitrogen, and then obtain 1.5L of formation water samples; carry out endogenous microorganism activation and emulsification experiments within 10 hours, and pour them into the Erlenmeyer flask After adding the formation water sample, add a mass concentration of 0.3% glucose, a mass concentration of 0.1% peptone, an organic activator with a mass concentration of 0.01% dipotassium hydrogen phosphate, an...

Embodiment 3

[0076] Shengli Oilfield Block W 2 , the burial depth is 1879-2378m, the reservoir temperature is 70℃, the permeability variation coefficient is 0.357, and the reservoir permeability is 890×10 -3 μm 2 , the viscosity of crude oil is 1265mPa.s, the degree of recovery is 38.7%, and the oil-bearing area of ​​the test area is 6.35km 2 , effective thickness 32.5m, geological reserves 2.0×10 5 t.

[0077] 1. Screening of target reservoirs

[0078]Drain 10L of formation water before collecting samples from the target oil reservoir on site, fully replace the air in the sterile sampler with sterile nitrogen, and then obtain 2.0L of formation water samples; carry out the endogenous microorganism activation emulsification experiment within 10 hours, and pour it into the Erlenmeyer flask After adding the formation water sample, add a mass concentration of 0.5% glucose, a mass concentration of 0.3% peptone, an organic activator with a mass concentration of 0.05% dipotassium hydrogen pho...

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Abstract

The invention belongs to the technical field of microbial oil recovery, and specifically relates to a control method for the originalization of an emulsified oil displacement functional bacteria reservoir, which specifically includes the following steps: screening of target oil reservoirs; screening of emulsifying functional bacteria, and the screening index includes crude oil as carbon Evaluation of source emulsification ability and evaluation of emulsification functional bacteria oil reservoir originality ability; optimization of emulsification functional bacteria oil reservoir original regulation plan; field implementation, adjust field test plan according to field test results. The invention has the advantages of wide adaptability, clear control thinking, good operability, strong pertinence, low investment cost and good field test effect. Therefore, it can be widely used in field tests of microbial oil recovery.

Description

technical field [0001] The invention relates to a microbial oil recovery technology, in particular to a control method for the localization of an emulsified oil displacement functional bacteria oil reservoir. Background technique [0002] Many oilfields at home and abroad have entered the stage of high water cut after long-term water injection development. There is an urgent need for new enhanced oil recovery technology to achieve sustainable development of oilfields. Microbial flooding technology is an environmentally friendly and sustainable oil recovery technology. Oilfields provide new technical options for further enhanced oil recovery. Microbial oil recovery technology is divided into endogenous and exogenous microbial flooding. Among them, endogenous microbial flooding technology is low in cost, easy to operate, strong in adaptability, and has broad application prospects. This technology only injects nutrient solution (activator) into the reservoir, and utilizes the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22
Inventor 张绍东李彩风刘涛胡婧段传慧徐闯巴燕冯云谭晓明宋欣
Owner CHINA PETROLEUM & CHEM CORP
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