Oil & Gas Geology ›› 2012, Vol. 33 ›› Issue (1): 19-29,36.doi: 10.11743/ogg20120103

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Meso-Cenozoic volcanic rock distribution and reservoir characteristics in the Bohai Bay Basin

Jin Chunshuang1, Qiao Dewu1, Dan Weining2   

  1. 1. Strategic Research Center of Oil and Gas Resources, Ministry of Land and Resources, Beijing 100034, China;
    2. Research Institute of Exploration & Development, PetroChina Huabei Oilfield Company, Renqiu, Hebei 062552, China
  • Received:2011-04-12 Revised:2012-01-15 Online:2012-02-28 Published:2012-03-22

Abstract:

Bohai Bay Basin underwent two rifting cycles during the Mesozoic and Cenozoic era,accompanied by intense neutral-acidic and neutral-basaltic magmatism.Based on comprehensive research of the Meso-Cenozoic volcanic rock distribution and their reservoir types,characteristics and patterns,this paper discusses the exploration potential of volcanic hydrocarbon reservoirs in Bohai Bay Basin.The Mesozoic,especially the Early Cretaceous volcanic rock is mainly distributed in the east of the basin;the Cenozoic magmatism may be divided into four stages:Kongdian-Sha4,Sha3,Sha2-Dongying,Guantao.There are three types of volcanic hydrocarbon reservoirs in the basin,i.e.buried-hill,fault block and stratigraphic-lithologic hydrocarbon reservoirs.The first type is mainly developed in the Mesozoic volcanic rocks; the second type is mainly developed in the volcanic rocks of Kongdian-Sha4 stage; the third type is common in the Cenozoic volcanic rocks,of which the effusive facies are the most favorable for reservoir formation.The Sha3 volcanic rocks e contribute to the greatest volume of proven reserves.In addition to the Sha3 volcanic rocks the Mesozoic,Kongdian-Sha4 and offshore Sha2-Dongying volcanic rocks also show great potential for petroleum exploration.

Key words: Mesozoic, Cenozoic, volcanic rock, volcanic hydrocarbon reservoir, Bohai Bay Basin

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