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Title: Method for inverting reflection trace data from 3-D and 4-D seismic surveys and identifying subsurface fluid and pathways in and among hydrocarbon reservoirs based on impedance models

Abstract

A method is disclosed for inverting 3-D seismic reflection data obtained from seismic surveys to derive impedance models for a subsurface region, and for inversion of multiple 3-D seismic surveys (i.e., 4-D seismic surveys) of the same subsurface volume, separated in time to allow for dynamic fluid migration, such that small scale structure and regions of fluid and dynamic fluid flow within the subsurface volume being studied can be identified. The method allows for the mapping and quantification of available hydrocarbons within a reservoir and is thus useful for hydrocarbon prospecting and reservoir management. An iterative seismic inversion scheme constrained by actual well log data which uses a time/depth dependent seismic source function is employed to derive impedance models from 3-D and 4-D seismic datasets. The impedance values can be region grown to better isolate the low impedance hydrocarbon bearing regions. Impedance data derived from multiple 3-D seismic surveys of the same volume can be compared to identify regions of dynamic evolution and bypassed pay. Effective Oil Saturation or net oil thickness can also be derived from the impedance data and used for quantitative assessment of prospective drilling targets and reservoir management.

Inventors:
 [1];  [2]
  1. New Milford, NJ
  2. New York, NY
Publication Date:
Research Org.:
Columbia Univ., New York, NY (United States)
OSTI Identifier:
871803
Patent Number(s):
US 5798982
Assignee:
Trustees of Columbia University in City of New York (New York, NY)
DOE Contract Number:  
FC22-93BC14961
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; inverting; reflection; trace; data; 3-d; 4-d; seismic; surveys; identifying; subsurface; fluid; pathways; hydrocarbon; reservoirs; based; impedance; models; disclosed; obtained; derive; region; inversion; multiple; volume; separated; time; allow; dynamic; migration; scale; structure; regions; flow; studied; identified; allows; mapping; quantification; available; hydrocarbons; reservoir; useful; prospecting; management; iterative; scheme; constrained; log; depth; dependent; source; function; employed; datasets; values; grown; isolate; bearing; derived; compared; identify; evolution; bypassed; pay; effective; oil; saturation; net; thickness; quantitative; assessment; prospective; drilling; targets; seismic data; surface region; fluid flow; data obtained; seismic surveys; method allows; seismic source; subsurface volume; data derived; subsurface fluid; subsurface region; identifying subsurface; fluid migration; method allow; dynamic fluid; /367/702/

Citation Formats

He, Wei, and Anderson, Roger N. Method for inverting reflection trace data from 3-D and 4-D seismic surveys and identifying subsurface fluid and pathways in and among hydrocarbon reservoirs based on impedance models. United States: N. p., 1998. Web.
He, Wei, & Anderson, Roger N. Method for inverting reflection trace data from 3-D and 4-D seismic surveys and identifying subsurface fluid and pathways in and among hydrocarbon reservoirs based on impedance models. United States.
He, Wei, and Anderson, Roger N. Thu . "Method for inverting reflection trace data from 3-D and 4-D seismic surveys and identifying subsurface fluid and pathways in and among hydrocarbon reservoirs based on impedance models". United States. https://www.osti.gov/servlets/purl/871803.
@article{osti_871803,
title = {Method for inverting reflection trace data from 3-D and 4-D seismic surveys and identifying subsurface fluid and pathways in and among hydrocarbon reservoirs based on impedance models},
author = {He, Wei and Anderson, Roger N},
abstractNote = {A method is disclosed for inverting 3-D seismic reflection data obtained from seismic surveys to derive impedance models for a subsurface region, and for inversion of multiple 3-D seismic surveys (i.e., 4-D seismic surveys) of the same subsurface volume, separated in time to allow for dynamic fluid migration, such that small scale structure and regions of fluid and dynamic fluid flow within the subsurface volume being studied can be identified. The method allows for the mapping and quantification of available hydrocarbons within a reservoir and is thus useful for hydrocarbon prospecting and reservoir management. An iterative seismic inversion scheme constrained by actual well log data which uses a time/depth dependent seismic source function is employed to derive impedance models from 3-D and 4-D seismic datasets. The impedance values can be region grown to better isolate the low impedance hydrocarbon bearing regions. Impedance data derived from multiple 3-D seismic surveys of the same volume can be compared to identify regions of dynamic evolution and bypassed pay. Effective Oil Saturation or net oil thickness can also be derived from the impedance data and used for quantitative assessment of prospective drilling targets and reservoir management.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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