Shot computing method for shot points

A calculation method and shot point technology, applied in the field of offshore oil seismic exploration, can solve the problems of low accuracy and stability

Active Publication Date: 2014-10-15
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
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Problems solved by technology

[0005] The invention provides a calculation method for firing a shot at a shot point, which

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  • Shot computing method for shot points
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  • Shot computing method for shot points

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Embodiment Construction

[0108] The current cannon-point firing algorithm has low accuracy, weak adaptability to objective environments and unexpected situations, poor stability, and low precision. It is an urgent problem to realize a high-precision, good-stability cannon-point firing algorithm.

[0109] In order to solve the above problem, an embodiment of the present invention provides a method for calculating a shot at a shot point. Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0110] The basic process of marine seismic exploration operations: the survey ship tows the gun array and the cable to sail along the fore-drawing survey line, which pre-defines the theoretical firing point, that is, the fore-drawing shot point, according to the ship speed, GPS,...

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Abstract

The invention provides a shot computing method for shot points, and relates to offshore oil seismic exploration technologies; the problem that the current shot algorithm for shot points is low in accuracy and stability is solved. The method comprises: pre-treating DGPS data to obtain normal DGPS observation data; filtering the observation data, and computing the position of a DGPS node; transmitting the coordinate of the DGPS node to a ship reference point and the shot point; and computing the shot point according to the coordinate of the DGPS node. The technical scheme provided by the invention is applicable to marine seismic exploration, achieves shot point computation with strong adaptability, high accuracy and good stability.

Description

technical field [0001] The present invention relates to the technical field of offshore petroleum seismic exploration, more particularly, to a method for calculating shot point firing in offshore streamer seismic exploration, which is used for the calculation of firing shots in marine exploration. Background technique [0002] In marine seismic exploration, towline exploration seismic data acquisition is a commonly used method. The geophysical exploration ship fires shots in real time along the front drawn survey line, and the geophone collects the reflected seismic data in real time. The shot point firing algorithm needs to have as high accuracy as possible. That is, the distance of the actual shot point along the survey line is as close as possible to the front shot point, and the closer it is, the higher the reflection accuracy is. The shot accuracy directly affects the construction accuracy and acquisition accuracy. [0003] In bad sea conditions, such as various unexpec...

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Application Information

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IPC IPC(8): G01V1/28
Inventor 王斌阮福明朱耀强张昊楠
Owner CHINA NAT OFFSHORE OIL CORP
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