Method for improving imaging velocity model precision by utilizing well data

A technology of velocity model and model accuracy, which is applied in the seismology for logging records, etc., can solve the problems of low signal-to-noise ratio structural velocity model that is difficult to accurately determine, and achieve the effect of reducing uncertainty.

Inactive Publication Date: 2015-04-29
PETROCHINA CO LTD
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Problems solved by technology

[0011] In order to solve the technical problems described above, the present invention proposes a method for improving the accuracy of the imaging velocity model by using well data, which can solve the problem that the velocity model of complex structures with low signal-to-noise ratio is difficult to accurately determine in seismic data migration imaging

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  • Method for improving imaging velocity model precision by utilizing well data
  • Method for improving imaging velocity model precision by utilizing well data
  • Method for improving imaging velocity model precision by utilizing well data

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[0056] 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 part of the embodiments of the present invention, not all of them. 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.

[0057] Seismic data digital processing refers to the use of digital computers to process and analyze seismic information collected in the field to obtain high-quality and reliable seismic sections, and to provide intuitive and reliable basis and relevant geological information for the next step of data interpretation. In order to further improve the demand for seismic exploration in complex structural areas with low signal-to-noise ratio, without ...

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Abstract

The invention provides a method for improving imaging velocity model precision by utilizing well data. The method mainly comprises the following steps: seismic data obtained through field acquisition is processed, then, the technological means of velocity model analysis and migration imaging is adopted to reconstruct an image, further, on the basis of a velocity model, grid chromatography inversion velocity modeling is performed to obtain an optimized best velocity model, and finally, whole deviation is performed by utilizing the fused and optimized velocity model V excellent. The optimized and real velocity model for accurately describing the actual underground geological structure is utilized to perform whole deviation of the seismic data of an entire target area, so that the seismic data of the target area can be imaged well, and a reliable and clear seismic section is provided for further comprehensive geological research.

Description

technical field [0001] The invention belongs to the field of geophysics, and relates to a method for processing geophysical data, in particular to a method for improving the accuracy of imaging velocity models by using well data. Model building. Background technique [0002] Petroleum geophysical exploration is based on the difference in the physical properties of underground rock formations, through physical quantity measurement, to study the geological structure or rock formation properties, in order to find oil and natural gas geophysical exploration. In oil exploration, for areas covered by topsoil, desert and seawater without direct exposure of rock formations, petroleum geophysical exploration methods are mainly used to indirectly understand the geological structure and rock formation properties and find oil and gas reservoirs. At present, oil geophysical prospecting has become an indispensable means of oil exploration in covered areas. At present, data processing wi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/42
Inventor 刘文霞郭平宁日亮高树生李洪柱卢明德张高
Owner PETROCHINA CO LTD
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