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Injection-production pattern constructing method for carbonatite fault-karst reservoir

A carbonate rock and construction method technology, which is applied in the field of energy development of unconventional oil and gas reservoirs, can solve the problems that conventional well patterns are difficult to apply, ineffective water injection, and obvious side effects, and achieves efficient water injection development, optimized deployment design, and strong pertinence. Effect

Inactive Publication Date: 2017-09-22
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

[0005] 1. Conventional injection-production well patterns are mainly suitable for sandstone reservoirs with relatively complete reservoir structure, certain ductility, certain continuity on the reservoir plane, and certain regularity in oil-water distribution, while carbonate rock fault-karst reservoirs The type of reservoir space is mainly karst caves, the regularity of reservoir distribution is poor, and the ductility on the plane is extremely poor, so conventional well patterns are difficult to apply
[0006] 2. The well pattern deployment mode of carbonate rock fault-karst reservoirs in Tahe Oilfield is generally based on oil wells, and only when the oil wells have no production potential will they consider re-injection. Although this method of repairing the dead has some effects, the side effects are also very serious obvious
First of all, the relationship between it and adjacent wells is not clear, which may easily lead to ineffective water injection or water flooding of adjacent wells; secondly, the well layout method without the guidance of a unified well pattern construction method greatly reduces the displacement efficiency between injection and production wells
[0007] To sum up, the traditional injection-production well pattern deployment method is not suitable for carbonate fault-karst reservoirs, and there is currently no well pattern deployment idea and method for reference in this type of reservoir

Method used

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  • Injection-production pattern constructing method for carbonatite fault-karst reservoir

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Embodiment Construction

[0035] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0036] figure 1 A flow chart of a method for constructing an injection-production well pattern for a carbonate fault-karst reservoir according to an embodiment of the present invention is shown. Such as figure 1 As shown, the method includes the following step S110-step S140.

[0037] Step S110, using geophysical methods to identify and characterize the fracture-cave structure of carbonate rock fault-karst bodies.

[0038] Carbo...

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Abstract

The invention discloses an injection-production production pattern constructing method for a carbonatite fault-karst reservoir. The method includes the steps that a geophysics method is used for recognizing and representing a fracture-cavity structure of carbonatite fault-karst; based on recognition and representation of the fracture-cavity structure, a conceptual model of the carbonatite fault-karst is obtained in an abstract equivalent way; based on representation and the conceptual model for the fracture-cavity structure, a mechanism model for the carbonatite fault-karst is established, and according to the mechanism model, an injection-production pattern for the carbonatite fault-karst reservoir is designed.

Description

technical field [0001] The invention belongs to the technical field of energy development of unconventional oil and gas reservoirs, and in particular relates to an injection-production well pattern construction method for carbonate rock fault-karst reservoirs. Background technique [0002] At present, the development of injection-production well patterns for conventional clastic rock reservoirs has been relatively mature. The existing injection-production well patterns mainly include regular well patterns and irregular well patterns, and regular well patterns include row-column well patterns and area well patterns. Row-column well patterns are suitable for reservoirs with large distribution area, good ductility, and good physical properties; area well patterns are suitable for reservoirs with poor ductility and low flow coefficient; irregular well patterns are suitable for oil reservoirs with small oil-bearing area, A reservoir with uneven distribution of oil layers. [000...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/30G06F17/50
CPCE21B43/30G06F30/20
Inventor 荣元帅李青李小波刘洪光汤妍冰
Owner CHINA PETROLEUM & CHEM CORP
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