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Quantitative detection of fluid dist...

Tsuneyama, Futoshi.

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Quantitative detection of fluid distribution using time-lapse seismic.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Quantitative detection of fluid distribution using time-lapse seismic./
Author:	Tsuneyama, Futoshi.
Description:	166 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-08, Section: B, page: 4134.
Contained By:	Dissertation Abstracts International66-08B.
Subject:	Geophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3186409
ISBN:	0542287021

Quantitative detection of fluid distribution using time-lapse seismic.
Tsuneyama, Futoshi.

Quantitative detection of fluid distribution using time-lapse seismic. - 166 p.

Source: Dissertation Abstracts International, Volume: 66-08, Section: B, page: 4134.

Thesis (Ph.D.)--Stanford University, 2005.

The quantitative evaluation of time-lapse seismic data remains a challenge due to poor match between the model predictions and the actual seismic data.

ISBN: 0542287021Subjects--Topical Terms:

535228
Geophysics.

Quantitative detection of fluid distribution using time-lapse seismic.
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008 130610s2005 eng d
020 $a 0542287021
035 $a (UnM)AAI3186409
035 $a AAI3186409
040 $a UnM $c UnM
100 1 $a Tsuneyama, Futoshi. $3 1908526
245 1 0 $a Quantitative detection of fluid distribution using time-lapse seismic.
300 $a 166 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-08, Section: B, page: 4134.
500 $a Adviser: Gary Mavko.
502 $a Thesis (Ph.D.)--Stanford University, 2005.
520 $a The quantitative evaluation of time-lapse seismic data remains a challenge due to poor match between the model predictions and the actual seismic data.
520 $a Velocity anisotropy is one important reason for the mismatch. I compile experimental velocity-anisotropy data from cores to explore the empirical relationships between anisotropy parameters and general well-log information. Then, I develop a method to estimate Thomsen's anisotropy parameters &egr; and gamma using a regression of the data in the crossplot domain between velocity and porosity. I present an application result of the method to demonstrate the significance of the correction.
520 $a Next, using the corrected velocity, I present a method of impedance decomposition into Vp, Vs, and rho using three elastic impedances derived from the seismic inversion of angle stacks. In general, the maximum stack angle of seismic data is limited to be less than 30°, which is not wide enough to obtain the stable calculation result. I discuss the effect of noise on the analysis as the most important reason that decomposition is difficult. I show an innovative method incorporating rock-physics bounds as constraints for the analysis. I apply it to an actual dataset from an offshore oil field; I demonstrate the result of analysis for sand-body detection.
520 $a Based on the estimated Vp, V s, rho and shale volume from the elastic impedances, I develop a workflow to determine the saturation of formation-water, oil and gas from seismic data. First, I consider the pressure effect and the saturation scale of fluids for time-lapse seismic analysis. Second, I demonstrate a deterministic approach to computing the fluid saturation to evaluate time-lapse seismic data. In this approach, I derive the physical properties of the water-saturated sandstone reservoir. Then, by comparing the in-situ-fluid-saturated properties with the 100% formation-water-saturated reservoir properties, I determine the bulk modulus and the density of the fluid phase in the reservoir. Solving three equations simultaneously (bulk modulus, density and the total saturation), I compute the saturation of each fluid. In the result of the case study, I emphasize the validity of the workflow for quantitatively detecting the fluid displacement and for delineating a remaining oil accumulation.
590 $a School code: 0212.
650 4 $a Geophysics. $3 535228
690 $a 0373
710 2 0 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 66-08B.
790 1 0 $a Mavko, Gary, $e advisor
790 $a 0212
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3186409