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A Hybrid Approach to Full Waveform Inversion Using Simultaneous and Sequential Source Methods

An inversion and aggregation technology, applied in the field of geophysical exploration, can solve problems such as lack of data and difficulty in recording data close to the source

Inactive Publication Date: 2016-09-07
EXXONMOBIL UPSTREAM RES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, it is difficult to record data close to the source due to logic problems, and this means that data near offsets is generally missing

Method used

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  • A Hybrid Approach to Full Waveform Inversion Using Simultaneous and Sequential Source Methods
  • A Hybrid Approach to Full Waveform Inversion Using Simultaneous and Sequential Source Methods
  • A Hybrid Approach to Full Waveform Inversion Using Simultaneous and Sequential Source Methods

Examples

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Embodiment Construction

[0111] Figure 3-11 A synthetic example of inversion of constant density acoustic seismic data using the hybrid method of the present invention is shown when the fixed receiver assumption is violated. Compare the results to simultaneous source inversions where the stationary receiver assumption is valid.

[0112] image 3 is the true velocity model, i.e., the velocity model that will be used to generate the synthetic data. The water depth of the model is 500m, and the depth of the reservoir is 3km.

[0113] Figure 4 An example showing two representative sets of far offset finite shot points, encoded with the binary encoding described in PCT Patent Application Publication No. WO2008 / 042081. The limited offset feature of the shot set, evident from the figure, invalidates the fixed receiver assumption. However, it can also be seen that the fixed receiver assumption is valid for shallow time windows from 0 to about 3 seconds. Figure 4 It is shown that the receivers of the ...

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Abstract

The method of simultaneous full wavefield inversion of source (or receiver) coded geophysical data set to determine the physical property model of subsurface area, especially suitable for investigations that do not meet the geometric conditions of fixed receivers in data acquisition. First, a shallow time window (202) of data satisfying the fixed receiver condition is inverted by simultaneously encoding (203) source inversion (205). The deeper time window of data (208) is then inverted by sparse sequential source inversion (209) using the physical property model from the shallow time window (206) as a starting model (207). Optionally, a shallow time-window model is used to simulate missing long-range offset data (211) to generate a data set that satisfies the fixed receiver assumption, and then the data set is subjected to source encoding (212) and simultaneous source inversion ( 214) for inversion.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application 61 / 386,828, filed September 27, 2010, which is hereby incorporated by reference in its entirety in its entirety. This application is related to U.S. Provisional Application 61 / 386,831, filed September 27, 2010, and U.S. Patent Application 12 / Specific application for 903,749 benefits. These referenced applications are also incorporated herein by reference in all jurisdictions to which they are assigned. field of invention [0003] The present invention relates generally to the field of geophysical exploration, and more particularly to geophysical data processing. Specifically, the present invention is a method for inversion of data from multiple geophysical sources, such as seismic sources, including geophysical simulations - computing data from multiple simultaneously active geophysical sources in one simulation run. Background of the invention [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/40
CPCG01V1/30G01V2210/614G01V1/40
Inventor P·S·如斯J·R·克雷布斯C·曼科库维斯S·拉扎阮特斯S·李
Owner EXXONMOBIL UPSTREAM RES CO
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