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Oil reservoir top wing linkage stepped three-dimensional gas injection development method

A stepped, reservoir technology, applied in the development of fluids, earth-moving drilling, climate sustainability, etc., can solve the problems of unsatisfactory development economy, limited development speed, slow gas injection effect, etc. The effect of development economic guarantee, high gas sweep efficiency, and reduced control difficulty

Pending Publication Date: 2022-06-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] (1) The development speed is limited, and the effect of gas injection is slow
[0005] (2) Oil and gas migration interface is difficult to control and monitor, which affects the development effect of gas injection
[0006] (3) The amount of gas injection required is huge, and the development economy often fails to achieve satisfactory results

Method used

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  • Oil reservoir top wing linkage stepped three-dimensional gas injection development method
  • Oil reservoir top wing linkage stepped three-dimensional gas injection development method
  • Oil reservoir top wing linkage stepped three-dimensional gas injection development method

Examples

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Embodiment Construction

[0125] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solutions of the present invention are now described in detail below with reference to the following specific examples, but should not be construed as limiting the scope of implementation of the present invention.

[0126] This example takes the design of the top-flap linked stepped three-dimensional gas injection development plan of the PW giant fractured conglomerate reservoir as an example, and describes in detail the top-flap linked stepped three-dimensional gas injection development method of the reservoir provided by the present invention. The method includes: The following specific steps:

[0127] (1) Determine the basic parameters of the reservoir: large reserves (>50 million tons in the test area), poor pressure retention (>65%), high oil-bearing height (>600m), thick oil layer (>400m), and an average porosity of 10 %, the ...

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Abstract

The invention provides an oil reservoir top wing linkage stepped three-dimensional gas injection development method. The oil reservoir top wing linkage stepped three-dimensional gas injection development method comprises the steps that (1) whether a target oil reservoir is suitable for being developed through the oil reservoir top wing linkage stepped three-dimensional gas injection development method or not is judged according to a screening standard; (2) evaluating the gas injection feasibility by utilizing a theoretical method and / or an indoor experiment method, and determining an optimal gas injection medium required by the target oil reservoir; (3) carrying out refined three-dimensional geological modeling and refined numerical simulation on the target oil reservoir; and (4) adopting a top wing linkage stepped three-dimensional gas injection development mode to carry out gas injection development on the target oil reservoir. The method provided by the invention can achieve the purposes of quick effect, uniform migration of an oil-gas interface and good development economy, and provides support for better application and development of a technology for improving the recovery efficiency by gas injection in practice.

Description

technical field [0001] The invention relates to a step-type three-dimensional gas injection development method with linkage on the top wing of an oil reservoir, and belongs to the technical field of oilfield development and gas injection to enhance oil recovery. Background technique [0002] Gas injection development technology was first proposed in the 1930s. In the 1970s, the hydrocarbon injection gas miscible flooding technology in Canada had been successful; in the 1980s, due to the rise in hydrocarbon gas prices and the 2 Gas reservoir discovery, CO injection in North America 2 The miscible flooding technology developed rapidly; in the 1990s, the gas injection development technology became mature. After rapid development in recent decades, the success rate of global gas injection development projects has increased to 95%. As of 2014, the annual oil production of gas injection development reached 35.78 million tons, accounting for 37.6% of the third-production product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B43/16G06F30/20E21B43/30
CPCE21B49/00E21B43/168G06F30/20E21B43/305Y02P90/70
Inventor 周炜王晓光廉黎明郑胜王辉俞宏伟谢丹李想蒋志斌周庆杨胜建屈怀林宋文枫田茂章瞿利明
Owner PETROCHINA CO LTD
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