Shot detection domain bilateral beam synthesis method and system based on common offset domain result constraint
A technology of common offset and synthesis method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., and can solve the problem of non-focusing of seismic beam energy
Active Publication Date: 2018-12-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0004] The purpose of the present invention is to solve the problem that the energy of the seismic beam is not focused in the bilateral composite beam, and to provide a bilateral beam composite method in the offset field constrained by the result of the common offset domain
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[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0054] At present, the industry chooses the unilateral beam synthesis method for beam migration imaging. One is to avoid the problem of large and inefficient bilateral synthetic seismic beam data, and the other is to avoid the beam synthesis problem that the sparse shot points are not conducive to the shot side. If the problem of unfocused seismic beam synthesis energy caused by shot sparseness or insufficient data can be solved, the data compression rate, imag...
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The invention discloses a shot detection domain bilateral beam synthesis method and system based on common offset domain result constraint. The method comprises the steps that a shot detection wave point range subjected to statistical analysis in advance is divided into multiple rectangular surface elements, and the surface elements are numbered; a surface element data index structure containing surface element numbers is established according to acquired seismic record data; according to the surface element data index structure and input local plane wave synthesis parameters, common offset domain unilateral local plane waves of multiple individual surface elements are synthesized, and effective event data of the plane waves are extracted; and the effective event data is mapped from a common offset domain to a shot detection domain, and then shot detection domain bilateral local plane waves of the multiple individual surface elements are synthesized according to a shot detection domainbilateral beam synthesis inversion problem formula under the common offset domain result constraint and the common offset domain unilateral local plane waves obtained after mapping operation. By theadoption of the method or system, the problem that seismic beam energy does not focus in a bilateral synthetic beam can be solved, the compression rate of seismic beam data is increased, and imaging efficiency and precision are improved.
Description
technical field [0001] The invention relates to the technical field of petroleum geophysical exploration seismic data processing, and in particular to a method and system for combining bilateral beams in an offset field constrained by results in a common offset field. Background technique [0002] The Gaussian beam migration method is an important method in the field of migration imaging for seismic exploration data processing. It is between the wave equation method and the high-frequency approximate ray method. efficiency of the transfer method. Beam migration is a kind of method including Gaussian beam and simplification based on it. In a narrow sense, it refers to the simplified Gaussian beam migration imaging method, which has been widely researched and developed in academia and industry. Beam migration in a narrow sense should be more efficient than the Kerschhoff method and the traditional Gaussian beam migration. Among them, one of the methods to improve efficiency i...
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IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/30
Inventor 朱兆林曹丹平
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)