The Controlling Effect of Unconformity Structure on Hydrocarbon Accumulation

Abstract:

Based on lots of previous studies, the unconformity structure characteristics were studied and the controlling effect of unconformity structure on hydrocarbon reservoir, migration path and oil-gas reservoir type were analyzed. The result shows that the unconformity structure is composed of upper basal conglomerate layer, lower weathering clay layer and semi-weathering rock; the interlocking pores in basal conglomerate layer and pore-cave-fracture system in semi-weathering rock are the main storage space of hydrocarbon reservoir; And hydrocarbon migrates laterally through capillary “channeling effect” in interlocking pores, and the pore-cave-fracture system in semi-weathering rock is an important path for hydrocarbon migration laterally and vertically; stratigraphic overlap hydrocarbon reservoir and stratigraphic unconformity reservoir are the two type of reservoirs related to unconformity, and buried hill reservoir is an important type of the latter.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 90-96
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.90
• Online since: December 2012
• Authors: Yue Gang Feng, Ming Qi Zhang
• Keywords: Controlling Effect, Hydrocarbon Accumulation, Unconformity

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