西南石油大学学报(自然科学版)

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Reservoir Characteristics and Main Controlling Factor of the Third#br# Member of Xujiahe Formation in Yuanba Gas Reservo

WANG Hao1,2*, ZHOU Wen2, ZHANG Chong2   

  1. 1. Geology Exploratory Development Research Institute,CNPC Chuanqing Drilling Engineering Company Ltd.,Chengdu,Sichuan 610051,China
    2. State Key Laboratory of Reservoir Geology and Development Engineering,Chengdu University of Technology,Chengdu,Sichuan 610059,China
  • Online:2016-08-01 Published:2016-08-01

Abstract:

Researches have been done on the lithologic character,physical property,reservoir space,and main controlling
factor of the tight sand reservoir of the third member of Xujiahe Formation in Yuanba gas reservoir. The analysis of physical
data and observation of thin section reveals that the lithology of sandstone reservoir is mainly coarse to medium calcarenaceous
sand-stone with some medium to fine detritus quartz sandstone;calcarenaceous sandstone reservoir space is mainly secondary
dissolved pore,with intergranular dissolved pores and crevices. Reservoir property is characteristic of low porosity and high
permeability. Reservoir model is crevice and porosity reservoir. Sedimentary process controls the calcarenaceous sandstone
reservoir development of the third Member of Xujiahe Formation in Yuanba gas reservoir. Underwater distributary channel
deposit is the major microfacies in the calcarenaceous sandstone reservoir. Denudation and tectonic disruption are the major
geologic factors. The research results are of significance in the exploration and development of the third Member of Xujiahe
Formation in Yuanba gas reservoir.

Key words: calcarenaceous sandstone, reservoir characteristics, diagenesise, the third Member of Xujiahe Formation, Yuanba
gas reservoir

CLC Number: