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Method and device for evaluating reservoir cap association welllogging

A technology of reservoir-cap combination and evaluation method, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc., can solve the problems of insufficient understanding of oil and gas reservoirs, low efficiency, and high exploration investment, so as to improve the coincidence rate of interpretation and improve the accuracy sexual effect

Active Publication Date: 2019-04-16
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Insufficient understanding of residual oil and gas reservoirs leads to high exploration investment and low profitability

Method used

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  • Method and device for evaluating reservoir cap association welllogging
  • Method and device for evaluating reservoir cap association welllogging
  • Method and device for evaluating reservoir cap association welllogging

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Embodiment Construction

[0060] 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.

[0061] In view of the low accuracy of existing oil and gas reservoir identification and evaluation, this application conducts research on reservoir-cap combination logging evaluation from two aspects. One is to identify the type of shale caprock, and the other is to identify The type identification results are used to evaluate the reservoir. In o...

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Abstract

The invention provides a method and device for evaluating reservoir cap association welllogging, wherein the method comprises the following steps of: determining breakthrough pressure of a target shale cover layer according to the porosity of the target shale cover layer, and acquiring at least one auxiliary classification index corresponding to the target shale cover layer; determining the type of the target shale cover layer in a preset cover layer type library based on the breakthrough pressure and the auxiliary classification index of the target shale cover layer, wherein the cover layer type library is used for storing the corresponding relationship between each type of the cover layer and the breakthrough pressure and the auxiliary classification index; and combining the type of thetarget shale cover layer with a known evaluation result of the target reservoir covered by the target shale cover layer to obtain a comprehensive evaluation result aiming at the target reservoir. Theperformance classification of the shale cover layer can be accurately and effectively obtained, the storage conditions of the oil and gas reservoirs and the sealing performance of the oil and gas reservoirs can be combined with reservoir evaluation, the interpretation coincidence rate of welllogging evaluation can be effectively improved, and the accuracy of welllogging evaluation can be improved.

Description

technical field [0001] The invention relates to the technical field of petroleum detection, in particular to a reservoir-cap combined logging evaluation method and device. Background technique [0002] Cap rock is the main controlling factor of oil and gas accumulation, and good cap rock is a necessary condition for the formation of large oil and gas accumulation. At present, the international research on capping layers has entered into the combination of macroscopic qualitative and microscopic parameters, and has developed diffusion theory and storage box theory at the same time, but the evaluation criteria are not systematic and varied. Domestic research on caprocks is generally limited to the quantitative determination of microscopic parameters. According to breakthrough pressure, permeability, and classification of caprocks, the determination of various microscopic parameters of caprocks relies on samples obtained by drilling and coring, which is necessary. Yes, indispe...

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Application Information

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IPC IPC(8): E21B47/00
CPCE21B47/00
Inventor 窦立荣肖玉峰李国平
Owner BC P INC CHINA NAT PETROLEUM CORP
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