Method and apparatus for obtaining seismic synthesis record

A technology of synthesizing records and seismic wavelets, applied in seismic signal processing and other directions, can solve the problems of wrong horizon interpretation results, unfavorable horizon calibration, reservoir prediction, and interpretation troubles, etc., and achieve the effect of improving accuracy.

CN106970418AActive Publication Date: 2017-07-21PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-07-21

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Abstract

The embodiment of the application provides a method and apparatus for obtaining a seismic synthesis record. The method comprises: time-domain primary wave reflection coefficients of all reflection interfaces in a target work area are determined; downlink reflection control coefficients of all reflection interfaces are determined, wherein the downlink reflection control coefficients are used for controlling whether all reflection interfaces generate multiple wave reflection; according to the downlink reflection control coefficients and the time-domain primary wave reflection coefficients, a time-domain second reflection coefficient including transmission loss information and multiple wave reflection is obtained; and a seismic wavelet sequence is determined, and convolution is carried out the seismic wavelet sequence and the time-domain second reflection coefficient to obtain a seismic synthesis record. Therefore, the precision of the seismic synthesis record can be improved and multiple waves in a practical seismic record can be identified.
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Description

technical field

[0001] The present application relates to the technical field of seismic forward modeling in geophysical prospecting, in particular to a method and device for obtaining synthetic seismic records. Background technique

[0002] Synthetic seismic records are the intermediate media for converting geological models into seismic information, that is, synthetic seismic records (seismic traces) using acoustic logging or vertical seismic profile data. Seismic synthetic records are widely used in seismic model technology, and are also the basis for horizon calibration and reservoir description. Therefore, the accuracy of synthetic seismic records directly affects the accurate calibration of seismic geological horizons. Generally, synthetic seismic records are the result of seismic forward modeling. The so-called seismic forward modeling is to appropriately simplify a specific geological body to form a simplified data model or physical model, using data calculation met...

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Embodiment Construction

[0043] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0044] refer to figure 1 As shown, the method for obtaining synthetic seismic records in the embodiment of the present application may include the following steps:

[0045] S101. Determine the time-domain primary reflection coefficient of each reflection interface in the target work area; and determine the downlink reflection control coe...