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Azimuth fidelity angle domain imaging-based fractured oil and gas reservoir seismic exploration method

A technology of oil and gas reservoirs and angle domain, applied in the field of seismic detection of fractured oil and gas reservoirs based on azimuth-fidelity angle domain imaging, can solve problems such as high calculation costs, complex theories, and inconsistent requirements for oil and gas resource exploration, and achieve Practical effect

Inactive Publication Date: 2012-07-04
TONGJI UNIV
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Problems solved by technology

However, restricted by the complex theory and high calculation cost of this technology, it has only been used experimentally within the company recently, and has not been recognized by the industry, and it does not match the needs of my country's oil and gas resource exploration.

Method used

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  • Azimuth fidelity angle domain imaging-based fractured oil and gas reservoir seismic exploration method
  • Azimuth fidelity angle domain imaging-based fractured oil and gas reservoir seismic exploration method
  • Azimuth fidelity angle domain imaging-based fractured oil and gas reservoir seismic exploration method

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Embodiment

[0042] Aiming at the needs of fine imaging and description, azimuthal anisotropy analysis and fracture reservoir prediction and description of complex geological bodies (such as fault and fracture systems, carbonate rock reefs and dissolution pores, igneous rock intrusions and other special geological bodies), On the basis of relative fidelity pre-processing of azimuth and amplitude, pre-stack time migration imaging in local angle domain with azimuth fidelity is implemented, and a variety of result data volumes that cannot be obtained by conventional methods are obtained, which is helpful to fully tap the wide-azimuth seismic data in the interpretation stage. potential.

[0043] Before implementing the pre-stack time migration processing in the angle domain, pre-stack seismic data with relatively high amplitude noise suppression, static correction and surface consistency correction should be prepared in the conventional processing flow. Firstly, a reasonable velocity model is ...

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Abstract

The invention relates to an azimuth fidelity angle domain imaging data processing method aiming at fractured oil and gas reservoir seismic exploration. The azimuth fidelity angle domain imaging data processing method comprises the following steps of: (1) simulating three-dimensional seism of ground, acquiring a seismic wave signal by a data acquisition device, and preprocessing according to an amplitude relative fidelity processing flow; (2) determining, by input equipment, a local target and an imaging range thereof according to a geological task, halving azimuth imaging arrays and initializing azimuth / angle domain imaging arrays; and (3) gradually inputting seismic wave data preprocessed in the step (1) into a processor by the data acquisition device, determining a maximum imaging range corresponding to the seismic wave by the processor according to the position of a central point and migration aperture limitation, and the like. Compared with the prior art, the azimuth fidelity angle domain imaging data processing method has the advantages of high-accuracy imaging and description of a complex geologic body, capability of producing a high-fidelity multi-azimuth imaging data body and an azimuth common imaging point gather by fractured reservoir-oriented azimuth anisotropic analysis and parameter extraction, and the like.

Description

technical field [0001] The invention relates to a seismic detection method for fractured oil and gas reservoirs, in particular to a seismic detection method for fractured oil and gas reservoirs based on azimuth fidelity angle domain imaging. Background technique [0002] Narrow azimuth observation cannot completely record the 3D seismic wavefield and the mixed noise, which reduces the ability of seismic imaging and also affects the suppression of noise. In order to improve the imaging accuracy of complex geological bodies, improve the prediction and description of fracture systems, and improve the prediction of reservoirs and their hydrocarbon bearing properties, wide-azimuth 3D seismic acquisition technology has attracted more and more attention from the industry (Ling Yun, 2007). When seismic waves propagate through directional fracture systems, azimuth anisotropy of the wave field will be induced, manifested as changes in velocity or travel time with azimuth, and may also...

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Application Information

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IPC IPC(8): G01V1/28G01V1/36
Inventor 程玖兵马在田
Owner TONGJI UNIV
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