Joint wave field separation method for seismic data in optical fiber and wave detector well

A technology of seismic data and wave field separation, which is applied in seismology and seismic signal processing for logging records, can solve the problems of weak multiple waves, high coverage times and high resolution, and achieve the effect of improving reliability.

Pending Publication Date: 2022-06-03
OPTICAL SCI & TECH (CHENGDU) LTD
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Problems solved by technology

In many exploration areas at home and abroad, a large number of optical fiber and geophone well seismic data have been collected at the same time. Through comparative analysis and experience summary, it can be known that compared with geophone data, VSP data collected by optical fiber has the following advantages and disadvantages: (1) The quality of VSP data after preprocessing is comparable to that of co

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  • Joint wave field separation method for seismic data in optical fiber and wave detector well
  • Joint wave field separation method for seismic data in optical fiber and wave detector well
  • Joint wave field separation method for seismic data in optical fiber and wave detector well

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Embodiment Construction

[0018] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below with reference to the accompanying drawings.

[0019] The invention proposes a combined wavefield separation method of the optical fiber and the geophone well seismic data for the simultaneous acquisition of the optical fiber and the geophone in the well seismic data. like figure 1 As shown, it specifically includes several steps such as data preparation, data preprocessing, data consistency correction processing, weighted joint wave field separation processing, etc., which will be described in detail below with reference to the accompanying drawings.

[0020] 1) Data preparation:

[0021] Select the optical fiber and geophone well seismic data collected at the same time, record the optical fiber well seismic data as the first original data, and the geophone well seismic data as the second ori...

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Abstract

The invention discloses a joint wave field separation method for seismic data in an optical fiber and a detector well, belongs to the field of geophysics, and provides the joint wave field separation method for the seismic data in the optical fiber and the detector well in order to solve the problem that the seismic data in the optical fiber and the detector well collected at the same time cannot be processed at the same time. Advantages of seismic data in a well collected by the optical fiber and the detector are exerted, consistency correction of depth, time difference and amplitude of the optical fiber data is carried out by taking detector data as a reference, channel number increase is carried out on the data processed by the detector according to depth sampling density of the optical fiber data, and real fusion of data collected by two instruments is realized; and the reliability of seismic data processing in the well is effectively improved.

Description

technical field [0001] The invention belongs to the field of geophysics, in particular to a seismic data processing technology in a geophysical exploration well. Background technique [0002] In recent years, distributed optical fiber sensing (DAS) technology has gradually matured. Among them, the optical fiber vertical seismic profiling method (DAS-VSP) has become a popular method due to its advantages of full well section, high density, high efficiency, high temperature resistance, high pressure resistance and low cost. An important means of acquiring seismic data in wells. DAS-VSP technology can provide high-precision reservoir parameters, improve the fine description ability of oil reservoirs around wells, and have the ability to monitor oil and gas reservoir dynamics. In many exploration areas at home and abroad, a large number of fiber and geophone seismic data have been collected at the same time. Through comparative analysis and experience summary, it can be seen th...

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Application Information

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IPC IPC(8): G01V1/50
CPCG01V1/50
Inventor 蔡志东彭更新王熙明王腾宇王阳安树杰王冲张智高肖梦雄边瑞峰
Owner OPTICAL SCI & TECH (CHENGDU) LTD
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