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A method and device for determining prestack migration time results

A pre-stack migration and time technology, applied in the computer field, can solve the problems of inaccurate pre-stack migration time and inaccurate travel time, and achieve the effect of accurate results and accurate seabed reflection travel

Active Publication Date: 2019-07-05
BGP OF CHINA NAT GASOLINEEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the submarine seismic observation method, since the shot point is set on the sea surface and the receiver point is set on the seabed, the receiver point and the shot point are not on the same plane. time is inaccurate, which leads to inaccurate calculated prestack migration time

Method used

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  • A method and device for determining prestack migration time results
  • A method and device for determining prestack migration time results
  • A method and device for determining prestack migration time results

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Embodiment Construction

[0054] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] An embodiment of the present invention provides a method for determining a prestack migration time result, and the method may be executed by a terminal. Wherein, the terminal may be a computer or the like, and an application program for computing travel may be installed on the terminal, and a processor, a memory, a transceiver, a screen, and the like may be set in the terminal. The processor can be used to process the process of determining the prestack migration time result, the memory can be used to store the data that needs to be stored in the process of determining the prestack migration time result, the transceiver can be used to receive and send messages, and the screen can Used to display calculation results, etc.

[005...

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Abstract

The invention relates to a method and device determining a pre-stack migration time result, and belongs to the ocean earthquake exploration field; the method comprises the following steps: obtaining earthquake data of each earthquake channel; preprocessing vertical components in water inspection components and land inspection components of the earthquake data, thus obtaining seawater primary echo earthquake data corresponding to each earthquake channel; carrying out three dimensional interpolation treatment and smoothing treatment according to area stack velocity of discrete spots taking the sea level as a reference surface according to the history record, and building a velocity model taking the sea level as the reference surface; using the velocity model to determine the vrms of each sampling spot; determining a sampling spot vrms' according to the sampling spot vrms; determining a seabed earthquake downgoing wave travel time t of each sampling spot according to the vrms and vrms' of each sampling spot; determining a CIP gather of the Kircchhoff pre-stack time migration result. The method and device can obtain more accurate pre-stack migration time result.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a method and device for determining prestack migration time results. Background technique [0002] In the field of marine seismicity, the sea-level streamer observation method is commonly used in recent years, which is to set the shot point and the receiver point at sea level, and use the Kirchhoff pre-stack time migration method to calculate the pre-stack time offset. However, the sea level streamer observation method is easily affected by the tide and sea surface waves, making the observation data inaccurate. People have proposed a submarine seismic observation method. In the submarine seismic observation method, the shot point is set at the sea level, and the receiver point is set at the seabed. Submarine seismic observation methods can be divided into two categories, the first one is OBC (Ocean Bottom Cable, submarine cable) method, that is, the four-component geop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/305G01V2210/1297G01V2210/67
Inventor 王狮虎张少华王成祥张建磊张巍毅赵长海
Owner BGP OF CHINA NAT GASOLINEEUM CORP
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