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A Wavefield Reconstruction Method Based on Model Segmentation

A model and wave field technology, applied in the field of wave field reconstruction based on model segmentation, can solve the problem of low calculation accuracy of time partial derivatives

Inactive Publication Date: 2011-12-07
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

In terms of improving calculation accuracy, people have done a lot of work on how to improve the calculation accuracy of spatial partial derivatives, but the calculation accuracy of time partial derivatives is still low. How to solve the three-dimensional acoustic wave equation with high precision, high efficiency and low Reaching a practical level is a problem that needs to be solved

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  • A Wavefield Reconstruction Method Based on Model Segmentation
  • A Wavefield Reconstruction Method Based on Model Segmentation
  • A Wavefield Reconstruction Method Based on Model Segmentation

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Embodiment Construction

[0035] The invention obtains the wave field reconstruction record by solving the wave field reconstruction formula (2). In the process of TRON reconstruction, in order to adapt to the computer memory, the model needs to be divided into multiple blocks and put into different computer nodes, and ten rows of grids must be overlapped between adjacent blocks. Every time the wave field is calculated at a moment, the wave field of the overlapping part must be exchanged between two adjacent nodes. The time iteration is repeated, and the wave field at the position of the detection point at each time is output to obtain the reconstructed wave field record.

[0036] The specific embodiment of the present invention is:

[0037] 1) Use the field observation system to collect seismic data;

[0038] 2) Process the data collected in the field (including a series of processes such as static correction, dynamic correction, velocity analysis, stacking and migration of the collected single-shot...

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Abstract

The invention relates to a wave field reconstruction method for determining the distribution of underground oil and gas reservoirs by petroleum geophysical prospecting. The wave field values ​​at each discrete grid point at each moment are reconstructed by using the superimposed and offset profiles collected in the field and the discrete stratigraphic attribute model, and the wave field values ​​at each moment are reconstructed. The wave field at the location of the detection point is used as the wave field reconstruction record at this moment, and the superposition and migration profiles of the wave field reconstruction are obtained by processing. The distribution of underground oil and gas reservoirs is determined by comparison. The invention is suitable for complex structural wave field reconstruction, has high precision, high efficiency and low frequency dispersion, and is an important basis for determining underground oil and gas reservoirs.

Description

technical field [0001] The invention relates to seismic exploration technology, in particular to realizing seismic wave field reconstruction with high precision, high efficiency and low frequency dispersion in a cluster environment, and is a wave field reconstruction method based on model segmentation to help determine the structure of underground oil and gas reservoirs. Background technique [0002] Reflected wave seismic exploration excites seismic waves on the ground and uses geophones to receive reflection information from underground geological bodies—seismic records. The velocity, thickness and shape of the formation in the depth domain are obtained through seismic data processing and interpretation of the obtained reflection information. According to the obtained formation attribute parameters, simulate the field seismic data acquisition process to reconstruct the reflection information of the underground geological body (wave field reconstruction), and then compare a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 田振平张建磊姜绍辉齐玉玲
Owner BC P INC CHINA NAT PETROLEUM CORP
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