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A gas reservoir source identification method

An identification method and a technology of gas reservoirs, which can be applied to soil material testing, instruments, material inspection products, etc., and can solve problems such as poor certainty

Active Publication Date: 2019-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the defect of poor certainty in judging the gas source of the gas reservoir under the high thermal evolution degree in the above-mentioned prior art, and to provide a gas source identification method suitable for the gas reservoir under the high thermal evolution degree

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Embodiment Construction

[0036]The embodiment of the present invention will be described in further detail below in combination with an example of the Dongpu Sag in the Bohai Bay Basin of China and the accompanying drawings. There are two sets of source rocks in the Dongpu sag. Vertically, from top to bottom, they are Paleogene lacustrine dark source rocks and Upper Paleozoic coal-measure source rocks. The two sets of source rocks are widely distributed in the sag belt. It is characterized by large burial depth and high degree of thermal evolution, and both sets of source rocks have a large amount of gas generation. The gas source in the subsidence zone will be identified in combination with the accompanying drawings and tables, and the identification method is described as follows:

[0037] 1. Acquisition of gas geochemical data in the target area.

[0038] By sampling and testing the gas in different areas of the Dongpu Sag, the test results are as follows:

[0039] 1.1 The composition of the gas ...

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Abstract

The invention relates to a method for identifying the source of a gas reservoir, and belongs to the technical field of exploration and development of oil and gas. The method makes full use of the gas geochemical data of a target space to screen gas reservoir clustering validity parameters; the genetic type of the natural gas is determined according to the screened parameters; and based on maturity of gases in different matrix natural gas types and the changes of different types of hydrocarbon source rock vitrinite reflectance with the depth, the buried depth of hydrocarbon source rock generating gases in different types of gas reservoirs is finally established; and sources of gas reservoir of different matrix types are discriminated under high thermal evolution degree. The method can effectively guide the oil and gas exploration in sag belt.

Description

technical field [0001] The invention relates to a gas reservoir source identification method, which belongs to the technical field of oil and gas exploration and development. Background technique [0002] With the deepening of oil and gas exploration, the difficulty of oil and gas exploration in shallow buried structural uplift belts becomes more and more difficult, and the potential resource potential is getting smaller and smaller; while deep buried depression belts have become the focus of oil and gas exploration in the 21st century field. The subsidence zone is generally characterized by large burial depth, high formation temperature and high degree of thermal evolution. In basins with high thermal evolution, there are usually multiple sets of source rocks. For example, in the Bohai Bay Basin, Paleogene lacustrine dark source rocks and Upper Paleozoic coal-measure source rocks commonly exist. The sink zones are all distributed and generate a large amount of gas. Which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01V11/00
Inventor 徐田武谈玉明齐仁理李静慕小水丁峰
Owner CHINA PETROLEUM & CHEM CORP
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