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Fine description method and system for tight sandstone reservoirs

A technique for fine description of tight sandstone reservoirs, applied in seismology, instruments, measurement devices, etc., which can solve problems such as difficult to achieve and fine description of complex reservoirs

Active Publication Date: 2019-02-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention proposes a fine description method and system for tight sandstone reservoirs, which can solve the problem of tight sandstone reservoirs caused by the uniqueness, lithology and complex configuration of sand bodies through multi-scale and multi-information fusion. Elaborate description of difficult-to-achieve problems

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  • Fine description method and system for tight sandstone reservoirs
  • Fine description method and system for tight sandstone reservoirs
  • Fine description method and system for tight sandstone reservoirs

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Embodiment 1

[0031] figure 1 A flowchart showing the steps of the method for finely describing tight sandstone reservoirs according to the present invention.

[0032] In this embodiment, the method for finely describing tight sandstone reservoirs according to the present invention may include: step 101, based on post-stack 3D seismic data, and constrained by known geological laws and drilling and logging data, perform wave impedance inversion, Obtain the wave impedance inversion data volume; step 102, based on the intersection of the logging lithology and the wave impedance inversion data volume, determine the lithology division standard of the wave impedance inversion data volume; step 103, based on the sedimentary microfacies and the The lithological division standard, through the geological body identification technology, automatically identifies the geological body; step 104, based on the geological body, using the high-resolution sequence stratigraphy division result as a layer interf...

Embodiment 2

[0062] According to an embodiment of the present invention, a tight sandstone reservoir fine description system is provided, and the system may include:

[0063] It is used to perform wave impedance inversion based on post-stack 3D seismic data, constrained by known geological laws and drilling and logging data, and obtain the unit of wave impedance inversion data volume;

[0064] A unit for determining the lithology division standard of the wave impedance inversion data volume based on the intersection of the logging lithology wave impedance inversion data volume;

[0065] It is used to automatically identify the unit of the geological body through the geological body identification technology based on the sedimentary microfacies and the lithology division standard;

[0066] Based on the geological body, using the high-resolution sequence stratigraphic division result as a layer interface, performing geological body configuration analysis, and obtaining a unit of reservoir co...

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Abstract

The invention discloses a compact sandstone reservoir refined description method and system; the method comprises the following steps: using known geology rules and drilling and logging data as constraints according to post-stack three dimensional earthquake data, and carrying out wave impedance inversion so as to obtain a wave impedance inversion data body; determining lithology division standards of the wave impedance inversion data body according to logging lithology and wave impedance inversion data body intersections; using the geologic body identification technology to automatically identify the geologic body according to deposition microfacies and the lithology division standards; using a high resolution sequence stratum division result as a hierarchy interface so as to analyze thegeologic body configurations according to the geologic body, thus obtaining reservoir configuration parameters; using the geologic body as constraints and combining the reservoir configuration parameters so as to carry out three dimensional geology modeling, thus finishing reservoir refined descriptions.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas development, and more specifically, to a method and system for finely describing tight sandstone reservoirs. Background technique [0002] In the field of oil and gas development, fine reservoir description is the foundation and focus of the oil and gas development process. Based on the distribution and heterogeneity of layer parameters and their microscopic characteristics, the reservoir geological model is established. At present, the common basic idea of ​​fine reservoir description is: firstly, the lithofacies type is determined by core data analysis, combined with logging curve characteristics, logging facies analysis and interpretation are carried out, and the combination of regional geological background, vertical sedimentary sequence and plane facies is synthesized. Determining the sedimentary facies; comprehensively delineating the plane distribution range of sedimentary facies w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/612G01V2210/6169G01V2210/624G01V2210/66
Inventor 史云清胡向阳郑文波贾超陈舒薇刘建党张广权张守成
Owner CHINA PETROLEUM & CHEM CORP
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