Surface static correction method in desert area based on double compaction law
A static correction and static correction measurement technology, which is applied in the field of oil and gas seismic exploration in complex exploration areas, can solve the problems of non-unique static correction results and low precision, so as to ensure uniqueness and reliability, improve accuracy and high calculation efficiency Effect
Active Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP
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[0007] The purpose of the invention is to address the defects of the prior art and provide a static correction method for the surface of desert areas based on the law of double compaction, which is used to solve the problems of low precision and non-unique static correction results in the existing static correction methods
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[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary 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 by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0030] figure 1 It shows a schematic flow chart of an embodiment of the static correction method for the desert area surface based on the double compaction rule provided by the present invention, as figure 1 As shown, the method includes the following steps:
[0031] In step S1, a floating datum is established by processing seismic data.
[0032] In step S1, a floating datum can be established by processing the survey results of ...
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The present invention discloses a double-compaction law-based desert region surface static correction method. The method comprises the steps of establishing a floating reference surface; determining a surficial deposit compaction law formation and a normal deposit compaction law formation; fitting to obtain a depth- velocity relationship curve of the surficial deposit compaction law formation based on a near-surface velocity survey result in seismic data; fitting to obtain a depth- velocity relationship curve of the normal deposit compaction law formation based on the near-surface velocity survey result in seismic data; according to the detection point elevation, the shot point elevation, the shot point well depth, the floating reference surface elevation, the depth- velocity relationship curve of the surficial deposit compaction law formation and the depth- velocity relationship curve of the normal deposit compaction law formation, calculating to obtain a wave detection point static correcting value and a shot point static correcting value. According to the technical scheme of the invention, the surface static correction processing precision accuracy in the desert region is effectively improved. The uniqueness and the reliability of static correction results are ensured.
Description
technical field [0001] The invention relates to the technical field of oil and natural gas seismic exploration in complex exploration areas, in particular to a static correction method for surface layers in desert areas based on double compaction laws. Background technique [0002] In the desert-covered area of the Tarim Basin, due to the influence of high sand dunes on the surface, the seismic wave excitation and reception factors are quite different, resulting in serious hyperbolic distortion in single-shot records and prominent static correction problems, which bring great challenges to seismic data processing and interpretation. difficulty. [0003] In the processing of seismic data in desert areas, the first-arrival tomographic inversion method is usually used to process and calculate the static correction, but this tomographic inversion method has certain defects, mainly as follows: [0004] (1) The accuracy of the velocity model of the low-velocity-deceleration lay...
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IPC IPC(8): G01V1/36
CPCG01V1/362G01V2210/53
Inventor 蒋进勇杨威朱定周刚杨玉杰王丽
Owner CHINA PETROLEUM & CHEM CORP