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MapReduce-based travel time computation method and device

A computing method and technology of a computing device, applied in the field of oil and gas exploration geophysics, can solve the problems of complex data segmentation, affecting computing efficiency, and growth of backup data, etc.

Active Publication Date: 2017-04-19
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] MapReduce builds a parallel computing model based entirely on the perspective of data division. However, during travel time calculation, due to the overlap of speed model data required by adjacent shot points, the data segmentation is complicated, and the backup data will grow geometrically.
If the speed model data is segmented and backed up according to the HDFS data management method, it will lead to a large amount of redundant data, even hundreds of times more than the original data, causing a surge in data and affecting computing efficiency

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  • MapReduce-based travel time computation method and device

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Embodiment Construction

[0015] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0016] figure 1 shows a schematic diagram of speed model data segmentation according to the prior art, figure 1 In the left picture, A is the calculation grid during travel, and B is the position of a shot point during ray tracing during travel. The input data of the travel time calculation is the speed model data, and the minimum parallel calculation unit is a travel time calculation shot point. Since the interval of the calculation grid...

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Abstract

The invention provides a MapReduce-based travel time computation method and device. The method comprises the following steps: according to a travel time computation grid, obtaining total shot number and shot point information of each shot point for travel time to be computed ; according to travel time computation radius, calculating a ray tracing wave front arrival range of each shot point; serving the shot point information and the ray tracing wave front arrival range of each shot point as one structural body, and putting the structural body in a task queue; carrying out task segmentation on the task queue to allocate tasks for each Map calculation process, wherein the task of each Map calculation process is corresponding to one or more shot points calculated in the Map calculation process; in the Map calculation stage, according to the structural body of each shot point corresponding to the task of each Map calculation process, reading required velocity model data for carrying out travel time computation to obtain a travel time file; and in the Reduce calculation stage, carrying out reduction on the travel time file obtained in the Map calculation stage.

Description

technical field [0001] The invention relates to the field of oil and gas exploration geophysics, in particular to a method and device for calculating travel time based on MapReduce. Background technique [0002] At present, seismic data processing involves a large amount of data, a large amount of calculation, and a long calculation cycle, which puts high demands on the stability of the program and the performance of the hardware equipment. With the continuous growth of processing scale, the performance requirements of hardware and software are becoming more and more stringent, resulting in a sharp rise in processing costs. The reliability and adaptability of MapReduce provide a new solution for large-scale seismic data processing. The reliability of the MapReduce program reduces the requirements for hardware equipment, and the use of low-cost hardware equipment can realize large-scale efficient calculation, thereby reducing the cost of seismic data processing and improving...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04
Inventor 杨祥森魏嘉庞世明孙成龙亢永敢
Owner CHINA PETROLEUM & CHEM CORP
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