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Kirchhoff pre-stack time migration parallel method with no speed-up ratio bottleneck

A pre-stack time migration and speedup technology, which is applied in seismic signal processing and other directions, can solve the problems of reduced operating efficiency, speedup ratio bottleneck, and increased running time of migration programs, achieving small network traffic, scale expansion, and reduced redundancy. The effect of excess transmission

Active Publication Date: 2014-04-02
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

When the computer cluster bandwidth cannot meet the network traffic requirements of the seismic data of the pre-stack time migration program, the pre-stack time migration program will encounter a speedup bottleneck. At this time, increase the number of calculation nodes and the running time of the migration program On the contrary, it will increase and reduce the operating efficiency
Both of the above two methods have a speedup bottleneck, and the speedup bottleneck of the pre-stack time migration program according to the statistics of the international authoritative organization will appear around the number of nodes 90

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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0051] A Kirchhoff pre-stack time migration parallel method without acceleration ratio bottleneck of the present invention greatly reduces the total amount of seismic data transmission between computing nodes from the algorithm itself, and completely solves the problem of pre-stack time migration Network-intensive problems for parallel algorithms.

[0052] The present invention is realized through the following specific steps:

[0053] 1) The seismic data collected in the field is preprocessed after static correction, denoising and deconvolution;

[0054] Step 1) described preprocessing process is:

[0055] (1) Collect the X-coordinate of the shot point position, the Y-coordinate of the shot-point position, the X-coordinate of the receiver point position, the Y-coordinate of the receiver point position, the line number along the line direction (Inline), and the lin...

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Abstract

The invention is a large-scale Kirchhoff pre-stack time migration parallel method with no speed-up ratio bottleneck, and the method is used for seismic data processing in geophysical prospecting for petroleum. An output space is subdivided into four dimensions such as wire size and geophone offset, the number of the geophone offsets is calculated according to the minimum geophone offset, the maximum geophone offset and the incrementation parameter of the geophone offset, all calculated nodes are grouped, the numbers of nodes in different groups are even, the nodes in the same group are in consecutive order in the node name, and the pre-stack time migration of one geophone offset component is calculated by one group of nodes in one time. According to the parallel method provided by the invention, the minimum network transfer of the seismic data is achieved, the problem of network transfer intensity of the Kirchhoff pre-stack time migration is completely solved, and the scale of computing hardware is expanded, so that the computing interval of the pre-stack time migration is shortened.

Description

technical field [0001] The invention relates to the processing technology of petroleum geophysical exploration seismic data, which is a Kirchhoff pre-stack time migration parallel method suitable for large scale and without acceleration bottleneck. Background technique [0002] Kirchhoff prestack time migration technology is the most important time-domain imaging method in the process of seismic data processing in geophysical exploration. In addition, it can also output common image point gathers based on offsets, which are important information for further velocity analysis. [0003] In the case of horizontal surface, the migration formula of Kirchhoff integration method is: [0004] I ( ξ ) = ∫ Ω ξ W ( ξ , m , h ) D ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 王狮虎赵波王成祥寇芹罗国安祝宽海钱忠平
Owner BC P INC CHINA NAT PETROLEUM CORP
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