A three-dimensional high-precision velocity modeling method and system
A speed modeling, high-precision technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of high precision of time-depth conversion and inability to establish
Inactive Publication Date: 2017-11-03
东营康帕斯石油科技有限公司
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a three-dimensional high-precision velocity modeling method and system to solve the problem of being unable to establish an accurate, repeatable, and high-precision time-depth conversion velocity field
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[0045] The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention. The following descriptions in the specification are preferred implementation modes for implementing the present invention, but the descriptions are for the purpose of illustrating the general principle of the present invention, and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be defined by the appended claims.
[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0047] Such as figure 1 As shown, the present invention discloses a three-dimensional high-precision velocity modeling method, the method comprising steps:
[0048] S1. Establish a seismic horizon velocity model to constrain the seismic velocity;
[0049] S2. Calculate an...
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The invention relates to the technical field of earthquake velocity model building and discloses a method for building a three-dimensional high-precision velocity model. The method comprises following steps: geological information such as sonic logging data is acquired, interval velocity Vi is calculated on the basis of a time domain framework model through interpreting and analyzing the acquired information, and the interval velocity Vi is processed and constrained; the model is interpreted in combination with the time domain construction, statistics is performed to the interval velocity Vi according to the geological information, and the distribution rule of the interval velocity Vi is analyzed; two-dimensional horizons and the interval velocity Vi are filled in the three-dimensional framework; mean square root velocity and average velocity of a certain layer are calculated by use of the interval velocity Vi inserted into the model. The method and system make the process of converting an earthquake interpretation result from a time domain to a depth domain more efficient and accurate; timely maintenance and update can be realized when the geological information changes; the cost for enlarging the scope of the model is reduced.
Description
technical field [0001] The invention relates to the technical field of seismic velocity modeling, in particular to a three-dimensional high-precision velocity modeling method and system. Background technique [0002] The ultimate purpose of seismic data is to provide geological personnel with underground geological information. All geological information such as structure, stratum thickness, drilling data, and reservoir volume are calibrated based on depth units (meters, feet), but seismic data and seismic data interpretation results Most are also confined to the time domain. There are many reasons for this phenomenon, but most of them are caused by inaccurate velocity data and the complicated process of establishing the velocity field and performing depth conversion. [0003] In traditional seismic data, the velocity data are only some sparse point data with low precision. Most are average velocities or slice velocities expressed in depth-time pairs. The algorithm used t...
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IPC IPC(8): G01V1/30
CPCG01V1/303G01V2210/6161G01V2210/6169G01V2210/6222
Inventor 刘巍瑞吉姆·沙玛
Owner 东营康帕斯石油科技有限公司