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Demodulator probe secondary localization method

A technology of secondary positioning and detection point, which is applied in the directions of seismology and seismic signal receivers in areas covered by water, which can solve the problems of positioning accuracy, too much manpower and material resources, and difficulty in obtaining secondary positioning. Achieve the effect of improving positioning accuracy, reducing work intensity and saving work time

Inactive Publication Date: 2007-12-12
BGP OF CHINA NAT GASOLINEEUM CORP
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AI Technical Summary

Problems solved by technology

[0008] It can be seen that the existing "circle intersection positioning method" has a large amount of calculation and takes up a lot of manpower and material resources. At the same time, during the positioning calculation, the relative position of the two circles will have an impact on the positioning accuracy, making it difficult to obtain a higher secondary positioning

Method used

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Embodiment Construction

[0030] The present invention is based on the method of secondary positioning of the first arrival and leveling of the detection point based on the line calibration. First, find the position of a detection point. Preferably, the coordinates of this point are the actual position coordinates of the detection point.

[0031] Specific steps are as follows:

[0032] 1) Use conventional methods to observe and collect seismic data in the construction area, pick up the first arrival time of the shot data, and obtain the first arrival time T from each excitation point to the receiver point;

[0033] 2) Use conventional methods to establish the velocity field of the construction area, and obtain the seismic wave propagation velocity V from the excitation point to the receiver point;

[0034] 3) Taking the position of the primary positioning point of the detection point as the center, divide the surrounding area into grids, the side length of the grid area is 2*DS, and the number of grid...

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Abstract

The demodulator probe secondary positioning method of offshore oil earthquake starts with the looking for a demodulator probe location. Calibration of the demodulator probe based on the data of the location's data, if it is pulled in the best position, the coordinate of the point is the actual coordinate of the demodulator probe. It improves the existing speed over 7 times, with positioning precision significantly improved. It can reduce working load of relevant personnel, saving a lot of working time.

Description

technical field [0001] The invention relates to a petroleum geological exploration construction technology, and relates to a method for secondary location of a wave detection point in a petroleum earthquake in a shallow sea area. Background technique [0002] In the construction of petroleum geological seismic exploration in the shallow sea area, it is necessary to use a ship to sink the geophone to the seabed. When sinking, the geodetic coordinates of the geophone are generally recorded by the satellite positioning (GPS) equipment. This process is usually called the primary positioning of the geophone. If the location of the geophone point is accurate, after the linear motion correction is performed on the gather data of the geophone point in the information collected by seismic observation, the first-arrival take-off point should be flattened (as shown in Figure 1). Accurate location of receiver points during seismic observation acquisition is a necessary condition for hig...

Claims

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Application Information

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IPC IPC(8): G01V1/38G01V1/20
Inventor 倪成洲全海燕
Owner BGP OF CHINA NAT GASOLINEEUM CORP
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