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A method and device for separating uplink and downlink wave fields of seismic data from land and water geophones

A technology for seismic data and wave field separation, which is applied in the fields of petroleum exploration, mining and development, and can solve the problems of large time difference and inability to effectively remove events, etc.

Active Publication Date: 2020-02-14
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for areas where the seawater depth exceeds 10 meters, the time difference between the original reflected seismic wavelet and the subsequent seawater multiple wave interference is very large, so that the deconvolution algorithm cannot effectively remove the event caused by the seawater multiple wave interference.

Method used

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  • A method and device for separating uplink and downlink wave fields of seismic data from land and water geophones
  • A method and device for separating uplink and downlink wave fields of seismic data from land and water geophones
  • A method and device for separating uplink and downlink wave fields of seismic data from land and water geophones

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Embodiment Construction

[0087] Embodiments of the present application provide a method and device for separating uplink and downlink wave fields from seismic data of land and water geophones.

[0088]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.

[0089] An embodiment of the present application provides a method for separating uplink and downlink wave fields from seismic data of land and water geophones. The method...

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Abstract

An embodiment of the invention discloses an uplink and downlink wave field separation method and device for seismic data of land and water detectors. The method includes determining initial uplink wave field data and initial downlink wave field data based on water detector seismic data and land detector seismic data of a target area; determining related functions of the uplink and downlink wave fields based on the initial uplink wave field data and the initial downlink wave field data; establishing a target function according to the related functions of the uplink and downlink wave fields; determining a target wave field separation coefficient based on the target function; determining target uplink wave field data and target downlink wave field data based on the target wave field separation coefficient, the initial uplink wave field data and the initial downlink wave field data. By adopting the technical scheme provided by the invention, the uplink wave field and the downlink wave field can be separated effectively.

Description

technical field [0001] The application relates to the technical field of petroleum exploration, exploitation and development, and in particular to a method and device for separating uplink and downlink wave fields of seismic data of hydrophones. Background technique [0002] With the development of seismic exploration technology, offshore oil and gas exploration is becoming more and more difficult and deeper, and the requirements for signal-to-noise ratio and resolution of seismic data are also getting higher and higher. 3D seismic can accurately describe reservoirs. Maritime dual-detection data acquisition technology, including OBC (Ocean Bottom Cable, submarine cable), OBN (Ocean Bottom Node, submarine node) and double-detection towline, etc., fix the underwater geophone and land geophone together, and receive air guns separately The pressure wave field and velocity wave field generated by the source to obtain high-resolution 3D seismic data. They all use a fixed arrange...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 高少武张少华钱忠平王成祥方云峰王爱佳
Owner BC P INC CHINA NAT PETROLEUM CORP
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