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A method for optimization of field injection process parameters for microbial flooding

A technology for process parameter optimization and microbial flooding, which is applied in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problem of low accuracy and reliability of field injection process parameters, no determined parameter value range, There is no theoretical basis and other issues to achieve the effect of high reliability and accuracy, simple steps, and improved test results

Active Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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Problems solved by technology

[0003] Through literature search, "Journal of Northeast Petroleum University" No. 3 article in 2011 "Optimization of Injection Process Parameters for Endogenous Microbial Flooding in Block Zhan3", author: Du Rongguang, Guo Liaoyuan, Guo Xingxue, this article introduces the simulation of Zhan3 block oil Under reservoir and fluid conditions, 16 sets of orthogonal tests were carried out on the three factors and four levels of activator injection amount, activator injection method and air injection amount by using the orthogonal test method, and finally determined the best on-site injection scheme: activator The injection volume is 0.3PV, the slug size ratio is 1:3, and the air distribution volume is 15:1 (air-liquid volume ratio). The disadvantages of this article are: (1) The determined parameters (activator injection volume, activation (2) The value range of each parameter is not determined; (3) The level of each parameter is selected empirically in the orthogonal experiment
Due to the above defects, the accuracy and reliability of the on-site injection process parameters determined in this paper are not high

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  • A method for optimization of field injection process parameters for microbial flooding
  • A method for optimization of field injection process parameters for microbial flooding
  • A method for optimization of field injection process parameters for microbial flooding

Examples

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Embodiment 1

[0020] Example 1—Taking Block A of an oil production plant in Shengli Oilfield as an example

[0021] Block A is an unconsolidated sandstone hydrophilic reservoir with high permeability, high saturation, medium-high viscosity, and fluvial deposits, with a burial depth of 1173m-1230m, a reservoir temperature of 69°C, and a pressure of 10MPa. 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. Utilize the method described in the present invention to carry out microbial flooding field injection process parameter optimization, determine the best field injection process parameter, concrete steps are as follows:

[0022] (1) On-site injection process parameters screening

[0023] The process parameters selected for block A are activator concentration, ...

Embodiment 2

[0050] Example 2—Taking Block F of an oil production plant in Shengli Oilfield as an example

[0051] Block F is an unconsolidated sandstone hydrophilic reservoir with high permeability, high saturation, medium-high viscosity, and fluvial deposits, with a burial depth of 1598m-1965m, a reservoir temperature of 85°C, and a pressure of 9.5MPa. The coefficient of variation of permeability is 0.635, the porosity is 35.3%, and the air permeability is 1.8μm 2 ~3.5μm 2 . The oil-bearing area of ​​the test area is 1.96km 2 , effective thickness 20.5m, geological reserves 563.8×10 4 t. There are 12 oil wells and 6 water wells. Utilize the method described in the present invention to carry out microbial flooding field injection process parameter optimization, determine the best field injection process parameter, concrete steps are as follows:

[0052] (1) On-site injection process parameters screening

[0053] The process parameters selected for block F are activator concentratio...

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Abstract

The invention belongs to the technical field of MEOR (Microbial Enhanced Oil Recovery), and particularly relates to a method for optimizing microbial oil displacement site injection process parameters. The method comprises the following steps of (1) screening site injection process parameters; (2) determining a value range of the site injection process parameters; (3) optimizing the site injection process parameters. The method disclosed by the invention has the advantages of simpleness in step, strong logicality, strong operability, high reliability and accuracy of an optimized result and the like, and thus the method can be widely applied to laboratory tests and site tests of MEOR.

Description

technical field [0001] The invention belongs to the technical field of microbial oil recovery, in particular to a method for optimizing technical parameters of microbial oil flooding on-site injection. Background technique [0002] Microbial oil recovery technology refers to the technology that uses microorganisms and their metabolites to increase crude oil production and recovery. Compared with other tertiary oil recovery technologies, microbial oil recovery technology has the characteristics of wide application range, simple process, good economic benefits, and no pollution. Good application prospects, and thus more and more attention. Among them, the optimization of microbial flooding field injection process parameters is an important part of microbial flooding laboratory experiments, a prerequisite for microbial flooding to enter field tests, and provides a theoretical basis for the design of field test schemes. [0003] Through literature search, "Journal of Northeast ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22
Inventor 李希明郭辽原曹功泽李彩风王静郝滨杜春安吴晓玲宋欣徐鹏曹嫣镔宋永亭
Owner CHINA PETROLEUM & CHEM CORP
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