Reservoir Characteristics and Diagenesis of the First-second Member
of Jialingjiang Formation in the Southeast of Sichuan Basin

Abstract

Abstract:

Based on the outdoors crop，core observation，thin section analysis，porosity testing，permeability testing and so on，
analyze the reservoir characteristics，diagenesis and the reservoir controlling factors of the first-second member of Jialingjiang
Formation in the southeast of Sichuan Basin in details. The reservoirs mainly exist in the grain limestone and dolomite and the
reservoir space is mostly secondary pores. Porosity of the first-second member of Jialingjiang Formation is mainly between
1.00% and 2.00% with the average porosity of 1.64%；its permeability is mainly between 0.010 mD and 0.200 mD. Porosity
and permeability of the First-second member of Jialingjiang Formation are low and the reservoirs are typical tight reservoir.
The reservoir had suffered complicated diagenesis such as depression，pressure solution，dolomitization，recrystallization，
cementation，fracture diagenesis before the porosity of reservoirs was reduced from more than 50% at the time of depositing to
less than 5%. Reservoir of the first-second member of Jialingjiang Formation is controlled by the Microfacies，diagenesis and
fracture.

Wang Yong. Reservoir Characteristics and Diagenesis of the First-second Member
of Jialingjiang Formation in the Southeast of Sichuan Basin[J]. 西南石油大学学报(自然科学版).

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