A method to design geophysical surveys using full wavefield inversion point-spread function analysis

A point spread function and full wave field technology, which is applied in the field of hydrocarbon seismic survey and exploration, can solve problems such as imperfect resolution and sensitivity, poor focus, and failure to recover

Inactive Publication Date: 2018-08-03
EXXONMOBIL UPSTREAM RES CO
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Problems solved by technology

Since factors such as spatial sampling and bandwidth are rarely all ideal in practice, the resolution and sensitivity are not perfect, and the inversion process cannot recover the exact values ​​of the subsurface parameters
For such non-ideal surveys, spikes in a single parameter in the model and at a single location will produce a PSF that is poorly focused (i.e., spread) on adjacent spatial locations and other parameters

Method used

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  • A method to design geophysical surveys using full wavefield inversion point-spread function analysis
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  • A method to design geophysical surveys using full wavefield inversion point-spread function analysis

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Embodiment Construction

[0046] Exemplary embodiments are described herein. However, to the extent that the following specific description is specific, it is for purposes of illustration only and provides a simple description of the exemplary embodiments. Accordingly, the invention is not limited to the specific embodiments described below, but includes all alternatives, modifications and equivalents falling within the true spirit and scope of the appended claims.

[0047] Current technological advances extend the concept of FWI PSF analysis to survey design by using efficient approximations of point spread functions. PSF resolution analysis has previously been applied to survey design, but these applications have used linear (non-iterative) imaging tools such as ray tracing (Lecomte, 2008) or finite-difference forward modeling (Xie et al., 2006). In contrast, current advances use FWI to approximate point spread function information; where the information used to approximate the PSF is extracted duri...

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Abstract

A method, including: determining, with a computer, point spread functions for a plurality of parameter locations by performing at least a portion of a first iteration of an iterative full wavefield inversion process; determining at least one property for each of the point spread functions; and evaluating a candidate survey design based on the at least one property for each of the point spread functions.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application 62 / 269,212, entitled "A METHOD TO DESIGN GEOPHYSICALSURVEYS USING FULL WAVEFIELD INVERSION POINT-SPREAD FUNCTION ANALYSIS," filed December 18, 2015, the entire contents of which are incorporated herein by reference. technical field [0003] The exemplary embodiments described in this section relate to the field of geophysical prospecting, and more particularly to seismic survey prospecting of hydrocarbons. In particular, exemplary embodiments relate to methods using full wavefield inversion. Background technique [0004] This section is intended to introduce various aspects of the art that may be associated with the exemplary embodiments of the invention. It is believed that this discussion helps to provide a framework for better understanding certain aspects of the invention. Accordingly, it should be understood that this section is to be rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00G01V1/00
CPCG01V1/003G01V11/00G01V1/282
Inventor W·A·伯内特M·J·特勒尔P·蒂姆特洛夫T·A·狄更斯唐雅勋P·S·劳斯W·科里D·E·维伦
Owner EXXONMOBIL UPSTREAM RES CO
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