惠民凹陷沙河街组基山三角洲中孔低渗储层成岩作用和有利储层成因

doi:10.3969/j.issn.1673-8926.2013.05.001

Lithologic Reservoirs ›› 2013, Vol. 25 ›› Issue (5): 1-7.doi: 10.3969/j.issn.1673-8926.2013.05.001

Diagenesis of medium porosity and low permeability reservoir and genesis of favorable reservoir of Jishan delta of Shahejie Formation in Huimin Depression

ZHU Xiaomin¹， PAN Rong¹， LI Panpan¹， LIU Yinghui¹， ZHANG Shoupeng²， HAN Xuefang³

1. College of Geosciences， China University of Petroleum， Beijing 102249， China； 2. Geological Scientific Research Institute，Sinopec Shengli Oilfield Company， Dongying 257015， China； 3. Research Institute of Exploration and Development，Tianjin Branch， CNOOC， Tianjin 300452， China

Online:2013-09-26 Published:2013-09-26

Abstract

Abstract:

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.

Key words: sequence stratigraphyframework, source-reservoir-caprock assemblage, Upper TriassicYanchangFormation, westernNanliangarea, OrdosBasin

ZHU Xiaomin， PAN Rong， LI Panpan， LIU Yinghui， ZHANG Shoupeng， HAN Xuefang. 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.

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