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The Method of Eliminating Ghost Waves Using Transmission Matrix Method

A technology of transmission matrix and detector, which is applied in the field of removing ghost waves by using the transmission matrix method, which can solve the problems such as the effect will be discounted, and achieve the effect of widening the frequency band, simple method, and objective and real processing results

Active Publication Date: 2018-07-20
恒泰艾普(北京)能源科技研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the change of offset distance and the change of exploration environment, and the only source wavelet collected in the same work area is used to remove ghost wave noise, the effect will be compromised

Method used

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  • The Method of Eliminating Ghost Waves Using Transmission Matrix Method
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  • The Method of Eliminating Ghost Waves Using Transmission Matrix Method

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Embodiment Construction

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0031] Such as figure 1 As shown, the method for removing ghost waves using the transmission matrix method in the embodiment of the present invention includes the following steps:

[0032] Step S1, acquiring the single channel seismic data received by each geophone.

[0033] In one embodiment of the present invention, the single-channel seismic data received by each geophone includes: the underwater depth of the seismic source at the excitation point and the underwater depth of the geophone at the receiving point.

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Abstract

The invention provides a ghost reflection removing method through a transmission matrix method. The ghost reflection removing method comprises the steps that single-channel seismic data received by each detector are acquired; a ghost reflection transmission matrix equation is established: Gm=d, and a model data vector m without ghost reflection is solved through generalized inverse solution of a G matrix, wherein m is the model data vector without ghost reflection, and D is an observation data vector with ghost reflection; and as for the single-channel seismic data received by each detector, ghost reflection noise in the single-channel seismic data is removed by repeating the step S2 until the seismic channel data received by all the detectors are completely processed, and finally the seismic data without ghost reflection are outputted. The problem of no source wavelet in processing can be effectively avoided so that the ghost reflection removing method is simple, the obtained result has high resolution and the band is broadened.

Description

technical field [0001] The invention relates to the technical field of reflection seismic data processing in seismic exploration, in particular to a method for eliminating ghost waves by using a transmission matrix method. Background technique [0002] Ghost wave is a very strong interference wave in marine seismic exploration, it propagates closely after the primary wave, and will also be received by the geophone in the streamer. Offshore streamer seismic acquisition generally involves submerging the source and receiver to a certain depth underwater. When the source excites wavelets, the seismic wave propagates downward (abbreviated as downgoing wave) and upward (abbreviated as upgoing wave) at the same time. Since the sea surface is a very strong wave impedance interface, when the upgoing wave reaches the sea surface, it will be reflected and then propagate downward; similarly, some of the seismic waves reflected from the ground will directly reach the geophone, and some w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 成世琦张云波谢桂生
Owner 恒泰艾普(北京)能源科技研究院有限公司
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