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

Mokhtar, Puteri Nurlina (2008) Application of Acoustic Impedance Inversion ofE-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, El4, 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)
Academic Subject : Academic Department - Petroleum Geosciences - Petrophysics - Cased hole interpretation
Subject: Q Science > QE Geology
Divisions: Geoscience and Petroleum Engineering
Depositing User: Users 2053 not found.
Date Deposited: 09 Oct 2013 11:07
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/8276

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