Application of Acoustic Impedance Inversion of E-sand Reservoir on Dulang Unit Field

Puteri Nurlina Binti Mokhtar, Puteri Nurlina (2008) Application of Acoustic Impedance Inversion of E-sand Reservoir on Dulang Unit Field. Masters thesis, Universiti Teknologi Petronas.

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Abstract

An acoustic impedance inversion study as conducted over the Dulang Field.
The seismic data acquired in Dulang Field, represents a 3D data volume containing
sand reservoirs in interbedded sand and shale formations at different depths. The most
important formation in this field is the E-group formation, which consists of stacked
reservoirs. The objective of this study is to look at the extension of the E-sand
reservoirs. Inversion study is the preferred method to delimit the extent of E-group
focusing on the E7, E14, E23 and E34 sand reservoirs. The main steps of the Dulang
inversion study are initial seismic well ties, velocity-impedance model and acoustic
impedance inversion. Feasibility rock physics study need to be done using well logs to
differentiate between hydrocarbons. Gas sand, oil sand and wet sand can be
differentiated using cross plot between Impedance and Gamma Ray or any other logs.
Cross plotting was done on three vertical wells DLG 01, DLG 02 and DLG 04.
Estimating the wavelet that will be used to invert seismic data is an important step in
seismic inversion. Wavelet extraction is central to all seismic inversion techniques.
Statistical method was chosen to extract the wavelet. Finally, a model based acoustic
impedance inversion method was tested on a seismic line and an analysis of
hydrocarbons was done on the inverted volume. In the results shows a clear extension
of sand reservoirs in each sand package over DLG 01, DLG 02 and DLG 04 wells.

Item Type: Thesis (Masters)
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
Departments / MOR / COE: Geoscience and Petroleum Engineering
Depositing User: Users 5 not found.
Date Deposited: 11 Jan 2012 12:18
Last Modified: 15 May 2023 03:55
URI: http://utpedia.utp.edu.my/id/eprint/1604

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