Fusion chromatography static correction processing method for multiple work areas
A processing method and static correction technology, which are applied in the fields of seismology, seismic signal processing, and geophysical measurement for logging records, and can solve problems such as affecting the signal-to-noise ratio of seismic data.
Pending Publication Date: 2022-02-15
CHINA PETROLEUM & CHEM CORP +1
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[0027] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0028] Method example:
[0029] The processing area of 3D seismic data in a favorable area for exploration in a certain area is 146Km 2 , the processing task is to improve the imaging accuracy of deep strata, and provide high-quality seismic sections for searching favorable fault blocks and fault lithology reservoirs in deep strata in this area. Taking the three adjacent work areas in the favorable exploration area as an example, according to figure 1 The flow shown in the present invention illustrates a fusion tomographic static correction processing method for multiple work areas, including the following steps:
[0030] 1) The first arrival time of each work area is picked up by the first arrival time picking software, and the first arriva...
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The invention provides a fusion chromatography static correction processing method for multiple work areas, and belongs to the technical field of seismic data processing. First arrival time files of a plurality of single work areas are calibrated and merged to obtain a fused first arrival time file, geodetic coordinates of shot points and detection points in the fused first arrival time file are converted into coordinates of a fused work area, then fusion chromatography inversion is performed to obtain a speed model of the fused work area, the speed model of the fusion work area is divided according to a low speed reduction zone and a high speed layer speed distribution range in the reference work area to obtain a high speed top interface, and a chromatography static correction value is uniformly calculated according to the high speed top interface. By the adoption of the method, on one hand, the chromatography static correction precision of the boundary can be improved when a single block of seismic data is processed, on the other hand, the time difference problem caused by the difference of chromatography static correction values of different blocks in the overlapped area is solved when multiple blocks are subjected to fusion processing, and the signal-to-noise ratio of the seismic data is improved.
Description
technical field [0001] The invention provides a fusion tomographic static correction processing method for multiple work areas, which belongs to the technical field of seismic data processing. Background technique [0002] At present, major domestic oil fields have achieved good results in deep exploration and development of complex geological structures, showing good prospects for complex oil and gas reservoir exploration. However, static correction of complex surfaces has always been one of the difficult problems in seismic data processing, especially in mountain Surface forms such as the front zone and loess plateau have large surface undulations, severe lateral velocity changes, and serious static correction problems, which seriously affect the signal-to-noise ratio of seismic data and bring great challenges to seismic exploration. process of oil and gas exploration. [0003] In the prior art, the elevation static correction is often unable to solve the static correctio...
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Login to View More IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169G01V2210/6222G01V2210/53
Inventor 赵伟商建立杨兴圣詹凤林刘峰
Owner CHINA PETROLEUM & CHEM CORP