Sedimentology and diagenesis of Tertiary carbonates on the Mangkalihat Peninsula, Borneo: implications for subsurface reservoir quality

Combined field and laboratory studies of surface exposures on the Mangkalihat Peninsula, Borneo, provide new constraints on the chronostratigraphy, sedimentology and diagenesis of Tertiary carbonate deposits. The reservoir characteristics of carbonate facies are described, providing an analogue mode...

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Bibliographic Details
Published in:Marine and petroleum geology 2002-08, Vol.19 (7), p.873-900
Main Authors: Wilson, Moyra E.J, Evans, Martin J
Format: Article
Language:English
Subjects:
Applied sciences
Carbonate platform
Crude oil, natural gas and petroleum products
Diagenesis
Earth sciences
Earth, ocean, space
Energy
Exact sciences and technology
Facies
Fuels
Geology and geochemistry. Geological and geochemical prospecting. Petroliferous series
Hydrocarbons
Indonesia
Marine
Prospecting and exploration
Prospecting and production of crude oil, natural gas, oil shales and tar sands
Reservoir
Sedimentary rocks
Sedimentology
Stratigraphy
Tertiary
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Summary:Combined field and laboratory studies of surface exposures on the Mangkalihat Peninsula, Borneo, provide new constraints on the chronostratigraphy, sedimentology and diagenesis of Tertiary carbonate deposits. The reservoir characteristics of carbonate facies are described, providing an analogue model for carbonate reservoirs in the subsurface of this region. A mixed carbonate-siliciclastic shelf with intervening, probably fault-bounded, deeper water areas developed on the eastern part of the Mangkalihat Peninsula in the Late Eocene to Oligocene. During the Oligo-Miocene shallow-water platform carbonates accumulated over much of the area of the Mangkalihat Peninsula. This platform had a steep, reef-rimmed or possibly locally faulted northern margin, where high-energy conditions prevailed and marine cements were pervasive. In contrast, the platform interior was a low energy area, affected by leaching of aragonitic bioclasts. The best reservoir quality on the platform occurs in moderate energy grainstones and packstones, tens to hundreds of metres towards the platform interior from the platform margin, where a combination of primary intergranular and secondary mouldic porosity results in good porosity and permeability.
ISSN:0264-8172
1873-4073
DOI:10.1016/S0264-8172(02)00085-5