Abstract:

RESEARCH ON DIAGENESIS OF JIALING RIVER FORMATION，LOWER TRIASSIC IN SICHUAN BASIN
LIN Xiong1，2，HOU Zhong-jian1，TIAN Jing-chun1(1.State Key Laboratory of Oil and Gas Reservoir Geology and
Exploitation，Chengdu University of Technology，Chengdu Sichuan 610059，China；2.College of Earth Sciences，Chengdu
University of Technology，Chengdu Sichuan 610059，China)
JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SCIENCE & TECHNOLOGY EDITION)，VOL.31，NO.2,8-12,2009（ISSN 1674-5086，in Chinese）

Abstract：On the basis of the recognition of the sedimentary backgroud of Jialing River Formation in Sichuan Basin，by means of massive cores observation and rock thin sections inspection，the types of rocks are accuratly named，diagenesis is grouped into two categaries，i.e.，constructive one(dolomization，dissolution including gypsum dissolution，casting and tectonic cracking)and destructive one(compression，shrinkage and pressure dissolution，cementation，strong recrystallization ，the formation of new minerals and the filling of dissolved pores and fractures).The cause of pore formation is analyzed and the evidence of lithology is figured out，According to thin section inspection and oganic geoshemistry research，the diagenesis of Jialing River Formation of lower Triassic in Sichuan Basin is studied in detail and the diagenetic evolution history is reduilt.Based on multi-factors，diagenetic stages and pore space evolution，the diagenesis of the Jialing River Formation is correctly and wholly recognized，which provides a solid foundation for understanding the accumulative spaces of the Formation.

Key words: Sichuan Basin, Triassic, Jialing River Formation, reservoir, diagenesis