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Fracture-cave type reservoir space structure injection-production pattern optimal design method

A space structure and optimization design technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve problems that cannot meet the needs of fine development

Active Publication Date: 2019-09-24
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

On the other hand, the injection-production well pattern of fracture-vuggy reservoirs is constructed on the basis of the initial well pattern through oil well transfer injection. According to the above principles, multiple sets of plans may be obtained. How to further optimize the design is not mentioned.
Therefore, the existing technology cannot meet the needs of fine development

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Embodiment Construction

[0036] The details of the present invention can be understood more clearly in combination with the drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used to explain the purpose of the present invention, and cannot be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modifications based on the present invention, and these should be regarded as belonging to the scope of the present invention. The present invention will be further described below with reference to the accompanying drawings.

[0037] Figure 1 to Figure 5 Respectively are the flowcharts of the method for optimizing the injection-production well pattern of the fractured-cavity reservoir space structure of the present invention, the schematic diagram of the method for optimizing the injection-production well ...

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Abstract

The invention provides a fracture-cave type reservoir space structure injection-production pattern optimal design method. Multiple wells are arranged in an oil field block; and the fracture-cave type reservoir space structure injection-production pattern optimal design method comprises the following steps: S1) multiple initial injection-production schemes are determined according to the positions of all the wells or the types of reservoir bodies of all the wells; S2) the communication degrees of the injection-production wells in each initial injection-production scheme are calculated; S3) Gini coefficients of the communication degrees of the injection-production wells are calculated according to the communication degrees of the injection-production wells in each initial injection-production scheme; and S4) the initial injection-production scheme with the smallest Gini coefficient is selected as a final injection-production scheme. The fracture-cave type reservoir space structure injection-production pattern optimal design method prevents one-way acting caused by feeding of injected water along a high-guide channel, and improves the conformance efficiency of the injected water.

Description

Technical field [0001] The present invention relates to the technical field of oil and gas exploration and development, and more specifically, the present invention relates to an optimized design method for water injection and oil production of a well pattern with a space structure of a fracture-cavity reservoir. Background technique [0002] my country's marine carbonate reservoirs are mainly distributed in the Tarim Basin and are dominated by fracture-cavity types. The Ordovician reservoir in Tahe Oilfield is the largest fracture-cavity reservoir that has been discovered in my country. As of the end of 2016, the proven petroleum geological reserves had reached 1.336 billion tons. The Tahe fractured-vuggy reservoir started water injection in 2005. As of the end of 2016, unit water injection covered 598 million tons of geological reserves, accounting for 69% of the developed volume. It has become the main supplementary energy development method for Tahe Oilfield. [0003] The spa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/30E21B43/20
CPCE21B43/30E21B43/20
Inventor 郑松青王强郑惠光薛兆杰
Owner CHINA PETROLEUM & CHEM CORP
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