Reservoir properties and diagenesis of Permian sandstones in Huanghua Depression,Bohai Bay Basin

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  • 1.School of Geosciences,China University of Petroleum,Qingdao 266580,China; 2.Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science  and Technology,Qingdao 266071,China; 3.Dagang Oilfield Company,CNPC,Tianjin 300280,China

Received date: 2018-01-27

  Revised date: 2018-09-28

  Online published: 2018-12-17

Abstract

The Permian sandstone reservoir in Huanghua Depression is a key target for the Upper Paleozoic oil and gas exploration in Bohai Bay Basin.This paper used core observation,thin section,SEM analysis to express the sandstone reservoir of Huanghua Depression in performance and diagenesis characterization.The results show that the reservoir is between middle diagenesis A1 to A2 and the main types of diagenesis are compaction,cementation,dissolution and recrystallization.The porosity and permeability are low with poor correlation.Mainly develop pores in feldspars and kaolinite,seldom develop primary pores.The pore structure is divided into A-1,A-2,B,C,D and E.A-1 is the middle high pore throat,and the connectivity is the best.A-2 pore throat is the middle high pore with fine throat,and connectivity is good.B and C are small pore with fine throat,their connectivity are poor;D and E are small pore,and their connectivity are the worst.Different diagenesis has particular influence upon the quality of the reservoirs.Compaction and cementation soured physical properties.Dissolution greatly increased storage capacity by forming secondary pores which is conductive to the formation of high quality reservoir.

Cite this article

Jin Zi-hao, Zhou Li-hong, Cao Ying-chang, Fu Li-xin, Li Hong-jun, Lou Da, Sun Pei-pei, Feng Jian-yuan, Yuan Guang-hui, Wang Zhu-kun . Reservoir properties and diagenesis of Permian sandstones in Huanghua Depression,Bohai Bay Basin[J]. Natural Gas Geoscience, 2018 , 29(11) : 1595 -1607 . DOI: 10.11764/j.issn.1672-1926.2018.09.011

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