Origin of Tuffaceous Clastic Rocks of Lower Wuerhe Formation in Wuerhe Oil Field

Abstract

Abstract: A set of special tuffaceous rocks compose of ash tuff, bedded tuff and tuffaceous glutenite is partly developed in the Lower Wuerhe formation of Middle Permian in Wuerhe oil field and characterized by high resistivity and low interval transit time on the electriclog curves. Based on the analysis of core, cast thin section, logging and seismic data, it is considered that the tuffaceous clastic rocks are in closed to semi-closed arm of lake environment that is saline and alkaline and shaped by ash-clastic mixed accumulation. Such a reservoir is of feature of dual porosity media.

Key words: Junggar basin, northwestern margin, Wuerhe oil field, Lower Wuerhe formation, tuffaceous clastic rock, lake-arm sedimentary environment

CLC Number:

TE112.222

ZHANG You-ping, GONG Qing-shun, LIU Jing, LU Shu-ping, DING Liang-bo. Origin of Tuffaceous Clastic Rocks of Lower Wuerhe Formation in Wuerhe Oil Field[J]. Xinjiang Petroleum Geology, 2010, 31(2): 205-207.

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Origin of Tuffaceous Clastic Rocks of Lower Wuerhe Formation in Wuerhe Oil Field

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