Method for regulating and controlling microbial community for oil extraction

A microbial community, microbial flooding technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the lack of adaptability and pertinence, failure to detect such biomass, microbial community analysis level lag and other issues

Active Publication Date: 2010-09-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1. The traditional method only researches and determines the activation formula before the on-site implementation. Once it enters the on-site implementation, the formula is almost unchanged. It lacks dynamic monitoring and effect analysis of the on-site operation process, lacks corresponding control methods and countermeasures, and cannot be used on-site. Make timely response and adjustment to the effect and problems
[0006] 2. Considering the characteristics of medium-high temperature oil reservoirs, although microorganisms can survive at extreme high temperatures, no bacterial strains that overexpress metabolites such as surfactants and biopolymers have been found under high temperature conditions, and no obvious such strains have been detected in the field. Biomass
[0007] 3. The le...

Method used

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  • Method for regulating and controlling microbial community for oil extraction
  • Method for regulating and controlling microbial community for oil extraction
  • Method for regulating and controlling microbial community for oil extraction

Examples

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Embodiment

[0058] Embodiment, taking the pilot test of microbial flooding in a certain block of Shengli Oilfield as an example:

[0059] A certain block in Shengli Oilfield was selected as a pilot test area for microbial flooding. The test area is a water-loving reservoir of unconsolidated sandstone with high permeability, high saturation, medium-high viscosity, and fluvial deposits. The burial depth is 1173m-1230m, and the reservoir temperature is 69°C. The coefficient of variation of permeability is 0.538, the porosity is 33%, and the air permeability is 1.5μm 2 ~2.5μm 2 . The oil-bearing area of ​​the test area is 0.86km 2 , effective thickness 10.4m, geological reserves 164.9×10 4 t. There are 14 oil wells and 8 water wells. It is planned to use the reservoir ecological regulation and control means in the pre-flooding stage of microorganisms described in the present invention to carry out on-site implementation scheme design, and the specific steps are as follows:

[0060] Firs...

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Abstract

The invention relates to a technique for microbe oil extraction, in particular to a method for regulating and controlling a microbial community for the oil extraction. The method comprises the following regulating and controlling steps of: firstly, performing field sampling and detection on a goal oil deposit; secondly, judging a structure and the nutrient deficiency condition of the oil deposit microbial community according to a detected result, and then determining a preliminary regulation and control scheme; thirdly, optimizing the preliminary regulation and control mode by using a microbeoil displacement physical simulation experiment, and then determining a final regulation and control scheme; and finally, performing field implementation according to the optimized final regulation and control scheme. The invention provides the method for regulating and controlling the microbial community to be evolved into the goal structure in different phases of the field implementation, whichfurther improves the recovery ratio of the microbe and the effect of the field implementation.

Description

1. Technical field: [0001] The invention relates to a microbial oil recovery technology, in particular to a method for regulating and controlling microbial communities for oil recovery, and is especially suitable for an improved method for improving oil recovery by microbial flooding in medium-high temperature (greater than 50°C) oil reservoirs. 2. Background technology: [0002] Microbial Enhanced Oil Recovery refers to the technology that uses microorganisms (mainly bacteria, archaea) and their metabolites to increase crude oil production and recovery. Compared with other tertiary oil recovery technologies, microbial oil recovery technology has a wide range of applications. , simple process, good economic benefits, no pollution and other characteristics, has a good application prospect, so it has received more and more attention. At present, three types of technologies have been formed: microbial single well wax prevention, microbial stimulation and microbial flooding. ...

Claims

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Application Information

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IPC IPC(8): E21B43/22
Inventor 宋智勇郭辽原汪卫东高光军宋永亭安申法
Owner CHINA PETROLEUM & CHEM CORP
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