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Title: Estimation of porosity in thin-layered reservoirs by seismic inversion

Abstract

An effective method is presented to determine porosity distributions from seismic data for cases where the reservoir layers are thin. Porosity is determined by solving the inverse problem using a constrained generalized linear inversion (GLI) procedure. The inversion procedure estimates porosities directly rather than inverting for acoustic impedance or velocities and then estimating porosities. It is shown that sensitivity coefficients for porosity, i.e., the derivative of amplitudes with respect to porosity, can be computed analytically. Artificial interfaces are used to reduce non-uniquiness caused by lack of knowledge of thin bed reflection times. The artificial interfaces are generated by integration of seismic with log data. By using the artificial interfaces, the number of parameters to be estimated can be reduced and known formation information can be added as constraints. Inversion is done on only the seismic record associated with the reservoir instead of the whole seismic record.

Authors:
;  [1]
  1. Univ. of Tulsa, OK (United States)
Publication Date:
OSTI Identifier:
542937
Report Number(s):
CONF-951013-
TRN: 97:004463-0125
Resource Type:
Conference
Resource Relation:
Conference: SEG `95: 65. annual meeting and international exposition of the Society of Exploration Geophysicists (SEG), Houston, TX (United States), 8-13 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of SEG/Houston `95 - technical program; PB: 1623 p.
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 58 GEOSCIENCES; PETROLEUM DEPOSITS; EXPLORATION; RESERVOIR ROCK; SEISMIC SURVEYS; POROSITY

Citation Formats

He, Nanqun, and Reynolds, A C. Estimation of porosity in thin-layered reservoirs by seismic inversion. United States: N. p., 1995. Web.
He, Nanqun, & Reynolds, A C. Estimation of porosity in thin-layered reservoirs by seismic inversion. United States.
He, Nanqun, and Reynolds, A C. Sun . "Estimation of porosity in thin-layered reservoirs by seismic inversion". United States.
@article{osti_542937,
title = {Estimation of porosity in thin-layered reservoirs by seismic inversion},
author = {He, Nanqun and Reynolds, A C},
abstractNote = {An effective method is presented to determine porosity distributions from seismic data for cases where the reservoir layers are thin. Porosity is determined by solving the inverse problem using a constrained generalized linear inversion (GLI) procedure. The inversion procedure estimates porosities directly rather than inverting for acoustic impedance or velocities and then estimating porosities. It is shown that sensitivity coefficients for porosity, i.e., the derivative of amplitudes with respect to porosity, can be computed analytically. Artificial interfaces are used to reduce non-uniquiness caused by lack of knowledge of thin bed reflection times. The artificial interfaces are generated by integration of seismic with log data. By using the artificial interfaces, the number of parameters to be estimated can be reduced and known formation information can be added as constraints. Inversion is done on only the seismic record associated with the reservoir instead of the whole seismic record.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Conference:
Other availability
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