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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
2006. The American Association of Petroleum Geologists. All rights reserved.
DOI:10.1306/07130505004
Formation mechanisms of hydrocarbon reservoirs associated with volcanic and subvolcanic intrusive rocks: Examples in Mesozoic
Cenozoic basins of eastern China
Cenozoic basins of eastern China
Changzhi Wu,1 Lianxing Gu,2 Zunzhong Zhang,3 Zuowei Ren,4 Zhengyan Chen,5 Weiqiang Li6
1State Key Laboratory of Ore Deposit Research, Department of Earth Sciences, Nanjing University, Nanjing, People's Republic of China; [email protected]
2State Key Laboratory of Ore Deposit Research, Department of Earth Sciences, Nanjing University, Nanjing, People's Republic of China; [email protected]
3Department of Earth Sciences, Nanjing University, Nanjing, People's Republic of China; [email protected]
4Exploration and Development Research Institute (E
D institute), Liaohe Oilfield Branch Company, PetroChina, Liaoning Panjin, People's Republic of China; [email protected]
5Exploration and Development Research Institute (ED institute), Liaohe Oilfield Branch Company, PetroChina, Liaoning Panjin, People's Republic of China; [email protected]
6Department of Earth Sciences, Nanjing University, Nanjing, People's Republic of China; [email protected]
ABSTRACT
Numerous petroleum-producing Mesozoic–Cenozoic basins are present in the coastal areas of eastern China. Voluminous volcanic and subvolcanic intrusive rocks, dominantly basaltic and, to a lesser degree, trachytic in composition, are intercalated or intruded in the sedimentary sequences. These magmatic rocks can serve as cap rocks as well as reservoir beds for hydrocarbons. Hydrocarbon reservoirs related to volcanic rocks can be classified into the volcanic-trapped type, the volcanic-sealed type, and the weathering crust type, and those related to subvolcanic intrusions include the doming-derived fracture type, the cryptoexplosive breccia type, the primary fracture type, the alteration zone type, the contact zone type, and the laterally sealed type. A generalized model for the formation of hydrocarbon reservoirs related to volcanic and subvolcanic rocks is proposed. We call for more attention to volcanic- and subvolcanic-related reservoirs during the exploration for hydrocarbons.
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