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A fine seismic characterization method for tight oil and gas storage and seepage bodies

A technology for oil and gas storage and seepage, which is applied in the field of oil and gas exploration and can solve the problems of characterization systems or methods, and seismic fine-tuning of tight oil and gas storage and seepage bodies that have not yet been formed.

Active Publication Date: 2022-03-25
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0004] Existing tight oil and gas exploration technologies have gradually developed towards refinement, but the existing technical methods are basically carried out around tight rock reservoirs or fractures alone, and a set of systems or methods for seismic fine characterization of tight oil and gas storage and seepage bodies have not yet been formed.

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  • A fine seismic characterization method for tight oil and gas storage and seepage bodies
  • A fine seismic characterization method for tight oil and gas storage and seepage bodies
  • A fine seismic characterization method for tight oil and gas storage and seepage bodies

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[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0046] Such as figure 1 As shown, a fine seismic characterization method for tight oil and gas storage and seepage bodies, including the following steps:

[0047] S1. Collect post-stack time migration seismic data, drilling data, mud logging data, logging data, logging interpretation results, well location coordinates, well inclination data, stratigraphic layering data, as well as geological data such as cores and thin sections, and oil and gas testing results.

[0048] S2. Standardize the original logging data, establish a seismic interpretation work area, make seismic single-well synthetic records, perform horizon and reservoir calibration and horizon tracking, and structural interpretation of the target stratum boundary.

[0049] S3. Based on thin ...

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Abstract

The invention discloses a method for seismic fine characterization of tight oil and gas storage and seepage bodies. According to the characteristics of tight oil and gas geology and geophysics, based on post-stack time migration seismic data, through the optimization of the inversion method test, the reservoir inversion and inversion are performed. Based on the results of reservoir inversion, the energy storage coefficient is calculated; overcoming the difficulty of comprehensively describing fractured reservoirs caused by the different dimensions of different seismic attributes, for faults of different scales and fault prediction methods and parameters, in After unifying the dimensions, add the information representing the range of fractures, fractures, and fault zones to obtain a comprehensive evaluation body for faults; fuse the attributes of reservoirs and fractures to obtain a comprehensive evaluation body. The invention can intuitively reflect the development law of tight oil and gas storage and seepage bodies, and conduct evaluation well position deployment with high precision and high efficiency. Good application effect has been obtained in practical application, and the coincidence rate with actual drilling is high.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method for seismic fine characterization of tight oil and gas storage and seepage bodies. Background technique [0002] Tight oil and gas are widely distributed around the world and rich in resources. Internationally, oil and gas in reservoirs with overburden pressure permeability less than 0.1 mD and in non-shale rocks such as clastic rocks and carbonate rocks are generally defined as tight oil and gas. The main geological characteristics of tight oil and gas reservoirs are severe heterogeneity, small pore throat radius, high shale content, high water saturation, and strong reservoir sensitivity. Many years of practical experience on tight reservoirs at home and abroad show that: due to the tight and hard lithology of tight reservoirs, there are many natural fracture systems of different degrees, which are controlled by regional stress and have a certain direct...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 于童刘宏张璇吕文正张航张洁伟吕乐杨应谭磊张坤
Owner SOUTHWEST PETROLEUM UNIV
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