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SEISMIC ATTRIBUTES OF RESERVOIR E34 AT X FIELD

SATHASIV AM, SUNDARESAN (2008) SEISMIC ATTRIBUTES OF RESERVOIR E34 AT X FIELD. Masters thesis, Universiti Teknologi Petronas.

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Abstract

X Field is located in the west-central Malay Basin, offshore Malaysia. The X field main reservoirs are aligned on a stacked pattern within an anticline structure. Seismic attributes will be utilized to understand the faults distribution and extension of hydrocarbon sand of the E34 reservoir within the X field. The E34 interpreted horizon on seismic and the faults interpretation are incorporated to extract the hydrocarbon sand in the reservoir. The E36 reservoirs are characterized by massive bodies of sand. The attribute extraction shows that the distribution of sand bodies ties well with the structure map. Three different amplitude related attributes were utilized to determine the hydrocarbon sand extension. Crucial assumptions made in this project were the E34 reservoir is homogenous throughout the X field and the amplitude within the hydrocarbon sand zone does not show any anomalous change. The amplitude variation on several exploration and deviated wells are studied by observing the amplitude values given within the hydrocarbon zone. The well markers and related well logs are used to verify the hydrocarbon zone at each location. The hydrocarbon zone observed on well logs is approximately 36 ms. Therefore, the attribute extraction are conducted on a window basis. The minimum distance from E34 horizon showing hydrocarbon presence is 4 ms. The windows are extracted between 4ms to 36 ms below the E34 horizon, which apparently give the amplitude values for the hydrocarbon sand. First, the attributes are extracted for a wider range of amplitudes observed on seismic sections at the well location. Later these values are compared between windows of different depths to get the nominal value for hydrocarbon sand. The attribute analysis in this report was conducted for the entire X field. The main concentration was given to the Unit area where wells are available. Therefore, users may be able to determine expected possible hydrocarbon distribution at particular depth (ms) within the E34 reservoir. More wells need to be drilled in the Western and Eastern areas to understand the amplitude variance. These results can be incorporated to change the current amplitude limits for each attribute and define a new range for the Eastern and Western areas.

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/8548

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