Identification method of reservoir fluid properties

A technology of reservoir fluid properties and identification methods, applied in the field of reservoir fluid properties identification, can solve problems such as low identification accuracy, and achieve the effect of deepening understanding and high application value

Active Publication Date: 2017-12-05
PETROCHINA CO LTD
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Problems solved by technology

[0005] The invention provides a reservoir fluid property identification method, which is used to solve the problem of low recognition accuracy of existing reservoir fluid property identification methods, and improves the accuracy of reservoir fluid property identification

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  • Identification method of reservoir fluid properties
  • Identification method of reservoir fluid properties

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[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] At present, due to the continuous deepening of exploration and development, it is becoming more and more difficult to find large-scale high-quality sandstone gas reservoirs with medium-high porosity and medium-high permeability, which makes the exploration and development strata gradually shift to deep-ultra-deep formations. Tight sandstone...

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Abstract

The invention provides a reservoir fluid property identification method, comprising: analyzing a sandstone sample of a target reservoir section to be identified in a single well, obtaining first carbon isotope data constituting the sandstone sample, and processing the first carbon isotope data , to obtain the second carbon isotope data that meets the carbon content standard; according to the second carbon isotope data, a reservoir fluid property identification chart is established, and then according to the reservoir fluid property identification chart, the tight sandstone target reservoir section to be identified in a single well is The properties of the fluid are identified. The technical scheme of the invention significantly improves the accuracy rate of fluid property identification of the target reservoir section to be identified, deepens the understanding of gas reservoirs, and has high application value.

Description

technical field [0001] The invention relates to the technical field of geological research, in particular to a method for identifying reservoir fluid properties. Background technique [0002] At present, tight sandstone gas reservoirs are the main battlefield for increasing reserves and production in the field of natural gas exploration and development. They have burial depth (>4000m, and some even reach 8000m), poor reservoir physical properties (porosity<8%, permeability<0.1mD ), complex pore structure (throats are small, mostly <1μm), high formation pressure (>90MPa) and high temperature (above 150°C). The above characteristics make the drilling engineering in the gas reservoir area difficult, costly, and difficult to collect data. Therefore, if we want to formulate a reasonable development technical policy, we first need an effective reservoir fluid identification technology for the geological reserves of this type of gas reservoir. Make a reasonable eval...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 赵力彬江同文昌伦杰陈文龙孙雄伟朱忠谦肖香姣杨学君张同辉黄志龙郭晓波韩为
Owner PETROCHINA CO LTD
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