Method for checking closing error of velocity field during two-dimensional work area speed analysis in real time
A technique for velocity analysis and misclosure, used in seismic signal processing and other directions
Inactive Publication Date: 2013-04-03
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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The above research is to correct the velocity field closure of the data after the velocity analysis of the seismic data processing is completed, but the real-time inspection of the velocity field closure in the process of velocity analysis has not been mentioned yet.
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[0013] figure 1 A flow chart showing a real-time inspection method for velocity field closure during two-dimensional work zone velocity analysis according to an exemplary embodiment of the present invention.
[0014] Such as figure 1 As shown, in step S10, according to the position of the survey line in the two-dimensional work area, the intersection point (that is, the common center point) of the main survey line and the contact survey line in the two-dimensional work area is calculated. For example, the intersection of the main survey line and the contact survey line can be calculated according to the method shown below. Such as figure 2 as shown, figure 2 The solid line in represents the main survey line, while the dotted line represents the contact survey line. The position marked by the gray dot in the figure is marked as A on the main measuring line, and the coordinates are A(X A , Y A ). It is marked as B on the contact survey line, and the coordinates are B(X ...
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The invention provides a method for checking a closing error of a velocity field during two-dimensional work area speed analysis in real time. The method comprises the following steps of: calculating an intersection point between a main measuring line and a crossline according to a position of a two-dimensional work area measuring line; judging whether the main measuring line and the crossline are subjected to velocity analysis; when the main measuring line and the crossline are subjected to the velocity analysis, calculating velocity sections at the intersection point between the main measuring line and the crossline based on the main measuring line and the crossline respectively through a velocity interpolation and a smoothing method, otherwise, picking up the velocity of the measuring line which is not subjected to the velocity analysis and calculating the velocity sections at the intersection point between the main measuring line and the crossline through velocity interpolation and the smoothing method; and comparing and displaying the velocity sections, calculated based on the main measuring line and the crossline respectively, at the intersection point between the main measuring line and the crossline so as to check the closing error of the velocity field of a two-dimensional work area. By the method, the closing error of the velocity field during two-dimensional work area earthquake information processing can be eliminated effectively.
Description
technical field [0001] The present invention relates to the velocity analysis in the process of seismic data processing, specifically, it relates to the real-time inspection method of velocity value closure difference in the process of velocity analysis in the two-dimensional work area, which is mainly used in the process of data processing in the two-dimensional work area of geophysical exploration seismic Velocity closure error check during velocity model building. Background technique [0002] Velocity analysis is a very important step in seismic data processing, and velocity analysis by survey line is generally used in two-dimensional work areas. This method of velocity analysis with a single survey line as a unit cannot perform a close check of the velocity value at the intersection of the main survey line and the contact survey line during the speed picking process, resulting in the ubiquity of survey line intersections in the two-dimensional work area Velocity fiel...
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IPC IPC(8): G01V1/36
Inventor 熊晶璇刘鸿何光明朱晨巫骏陈三平李振
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD