Well group well spacing method of microbial oil displacement oil recovery technology

A microbial flooding and microbial technology, which is applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc., can solve the problems of not finding the existing technology

Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] In the technical field of tertiary microbial oil flooding, no prior art similar to the technical solution of the present application has been retrieved

Method used

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  • Well group well spacing method of microbial oil displacement oil recovery technology
  • Well group well spacing method of microbial oil displacement oil recovery technology
  • Well group well spacing method of microbial oil displacement oil recovery technology

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Embodiment Construction

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] see Figure 1 to Figure 4 , the present invention provides a technical solution:

[0059] A well group deployment method for microbial flooding and production technology, using microbial tertiary oil recovery technology to deploy a set of combined injection-production well pattern of production well production, vertical well injection plane corresponding, vertical three-dimensional, bottom injection and top production in thick sandstone reservoirs ;

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Abstract

The invention discloses a well group well spacing method of a microbial oil displacement oil recovery technology. A set of combined injection-production well pattern of horizontal well exploitation and vertical well injection is deployed in a thicker sandstone oil reservoir by utilizing a microbial tertiary oil recovery technology, and the combined injection-production well pattern needs to meet the requirements of plane correspondence, longitudinal three-dimension and bottom injection and top production; the vertical well injection refers to injecting microorganisms into a bottom area of a sandstone reservoir by using a vertical well, and the horizontal well exploitation refers to deploying the horizontal section of a production well in a top area of a thicker sandstone reservoir; the plane correspondence refers to overlapping the horizontal section of the injection vertical well and the horizontal section of the production well after being projected to the plane in an overlooking state, and an up-and-down corresponding relation is achieved; and the longitudinal three-dimensional refers to that the injection section of the vertical well and the horizontal section of the productionwell are arranged in parallel at different depths in the sandstone reservoir, and a three-dimensional well pattern is formed in the section parallel to the gravity direction and perpendicular to a main shaft of the horizontal section of the production well. The well group well spacing method has the advantages of being higher in oil sweeping efficiency, high in oil extraction capacity, higher infinal recovery ratio and the like.

Description

technical field [0001] The invention relates to the microbial oil recovery technology in the technical field of tertiary oil recovery in the oil exploitation industry, in particular to a method for arranging wells in a well group of the microbial flooding oil recovery technology. Background technique [0002] Worldwide, after primary oil recovery and secondary oil recovery, the total recovery rate after two conventional oil recovery generally only accounts for 30% to 40% of underground crude oil. The residual oil left in the formation still accounts for 60% to 70%, so how to increase the recovery rate and extract more crude oil from the ground has always been a subject of constant research in many countries in the world. [0003] Microbial enhanced oil recovery technology is to inject microorganisms and their nutrient sources into underground oil layers, so that microorganisms can live and reproduce in the oil layers. On the one hand, the direct effect of microorganisms on c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
CPCE21B43/16
Inventor 杨元亮吴晓磊王顺华刘英波胡春余陶建强张忠杰刘京煊高志卫梁建军孙立柱
Owner CHINA PETROLEUM & CHEM CORP
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