LITHOLOGIC RESERVOIRS

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  • Online:2008-09-15 Published:2008-09-15

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Abstract:

Based on the analyses of coring, logging, geochemical and testing data of 22 prospecting wells, it is believed
that the lower Dainan Formation of Paleogene in Jinhu Sag has favorable source rocks, including the fourth and the
second member of Funing Formation. Petroleum in the fault zone and in the slope zone respectively come from the
source rocks in the fourth member and the second member of Funing Formation. Delta channel sandbodies that
developed well in lower Dainan Formation together with the overlying mudstone characterized by high conductivity
compose the favorable reservoir"seal assemblage. Sandbody, fault and unconformity build up the petroleum migration
pathway in this area. Two kinds of petroleumaccumulation models are established in Jinhu Sag for subtle reservoir and
structural reservoir. The accumulation model for structural reservoir can be divided into two kinds for fault zone and
slope belt, which is favorable for guiding the further exploration.

Key words: reef flat reservoir, Carbonate, log response characteristics, reservoir zonation, Tarim Basin

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