Formation evaluation of fractured basement, Cambay Basin, India

Unconventional reservoirs such as fractured basalts, shale gas and tight sand are currently playing an important role in producing a significant amount of hydrocarbon. The Deccan Trap basaltic rocks form the basement of the Cambay Basin, India, and hold commercially producible hydrocarbon. In this s...

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Bibliographic Details
Published in:Journal of geophysics and engineering 2012-04, Vol.9 (2), p.162-175
Main Authors: Gupta, Saurabh Datta, Chatterjee, Rima, Farooqui, M Y
Format: Article
Language:English
Subjects:
Basalt
basaltic reservoir
Basements
Basins
Cambay Basin
fractured basement
Hydrocarbons
India
Lithology
Reservoirs
Sand
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Summary:Unconventional reservoirs such as fractured basalts, shale gas and tight sand are currently playing an important role in producing a significant amount of hydrocarbon. The Deccan Trap basaltic rocks form the basement of the Cambay Basin, India, and hold commercially producible hydrocarbon. In this study two wells drilled through fractured basalts are chosen for evaluating the lithology, porosity and oil saturation of the reservoir sections. Well logs, such as gamma ray, high resolution resistivity, litho density, compensated neutron and elemental capture spectroscopy, have been used in cross-plotting techniques for lithology and mineral identification. Formation micro imagery log data have been analysed to quantify the fractures and porosity in the fractured reservoirs for a well in the south Ahmedabad block of the Cambay Basin. The results of the analysis of two wells are presented and discussed and they are found to be in good agreement with geological and production data.
ISSN:1742-2132
1742-2140
DOI:10.1088/1742-2132/9/2/162