Key factors controlling hydrocarbon accumulations in Ordovician carbonate reservoirs in the Tazhong area, Tarim basin, western China.pdf

Marine and Petroleum Geology 43 (2013) 88e101
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Marine and Petroleum Geology
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Key factors controlling hydrocarbon accumulations in Ordovician
carbonate reservoirs in the Tazhong area, Tarim basin, western China
Hong Pang a,b, Junqing Chen a, Xiongqi Pang a,b,*, Luofu Liu a,b, Keyu Liu c,d, Caifu Xiang a,b
a State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
b Basin and Reservoir Research Center, College of Geosciences, China University of Petroleum, Beijing 102249, China
c CSIRO Petroleum Resources, . Box 1130, Bentley, WA 6102, Australia
d PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
article info abstract
Article history: The Tazhong area, at the center of the Tarim basin, western China, contains abundant hydrocarbon re-
Received 16 September 2011 sources, principally in Ordovician carbonate reservoirs. The geological conditions for hydrocarbon
Received in revised form accumulation in the area are plicated and are characterized by multiple stages of hydrocarbon
3 August 2012
generation, accumulation, adjustment and alteration. Despite decades of exploration and production in
Accepted 11 March 2013
the region, the mechanisms of hydrocarbon accumulation and their controlling factors are still not well
Available online 19 March 2013
established. The geological setting and the distribution characteristics of the reservoir, have been used to
investigate the mechanisms of accumulation, to quantitatively describe the main controlling factors, and
Keywords:
Tazhong area to predict potential favorable hydrocarbon accumulation zones in Ordovician carbonate rocks of Tazhong.
Hydrocarbon accumulation Our results show that the hydrocarbons in the Ordovician reservoirs came from mixed sources including
Ordovician carbonate reservoirs middle-lower Cambrian an