Petroliferous Property in Evaporitic Rocks and Sedimentary Basins

Abstract

Abstract: Evaporates normally occur in large-scale petroliferous basins in the world, so there exist closely relations between evaporates and petroliferous basins.This paper discusses the relations among evaporates, source rocks, oil-gas caprocks, oil-gas traps, oil-gas migration and accumulation.The study shows that evaporates act as protections for organic matter in basins, parts of them are as good source rocks; evaporates are effective caprocks and of fine plasticity and fluidity, thus providing good systematic networks and multiple trap types for oil-gas migration and accumulation; the overpressure in the bottom of evaporates tends to offer a driving force for secondary migration of hydrocarbon fluids.It is concluded that evaporates play an important role in hydrocarbon generation, migration, accumulation and preservation in sedimentary basins, and have effects on petroliferous property in the sedimentary basins.

Key words: evaporate, salt structure, sedimentary basin, oil-gas distribution

CLC Number:

TE111.3

XU Wen-shi, YU Xing-he, LIU Ni-na, JIANG Hui, ZHANG Guang-quan. Petroliferous Property in Evaporitic Rocks and Sedimentary Basins[J]. Xinjiang Petroleum Geology, 2005, 26(6): 715-718.

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