Diagenesis of medium porosity and low permeability reservoir and genesis of favorable reservoir of Jishan delta of Shahejie Formation in Huimin Depression
Online published: 2013-09-26
The sand bodies of Jishan delta of Shahejie Formation in Huimin Depression are consisted of feldspathic sandstone and lithic sandstone, mainly experienced compaction, cementation, dissolution and metasomatismin the burial diagenetic evolution, and the diagenetic evolution reached the middle diagenetic stage, which results in the mediumporosity and lowpermeability reservoir（current burial depth 1 700～3 500 m）. The dissolution played a significant role in improving
reservoir properties in the burial diagenetic evolution. The intergranular pores and intragranular pores, caused by the feldspar dissolution in the depth of 2 400～2 600 m, are constructive for the reservoir properties in increasing the porosity and permeability（the porosity up to 25% and the permeability up to 50 mD）. Obviously, the zone where the dissolution and the secondary pores developed is very important for predicting favorable reservoir.
ZHAO Tianlin1 , LUO Jinglan , DENG Yuan , LI Miao , BAI Xuejing , GUO Tao . Diagenesis of medium porosity and low permeability reservoir and genesis of favorable reservoir of Jishan delta of Shahejie Formation in Huimin Depression[J]. Lithologic Reservoirs, 2013 , 25(5) : 1 -7 . DOI: 10.3969/j.issn.1673-8926.2013.05.001
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