Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (5): 604-613.doi: 10.11743/ogg20060504

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Paleozoic Carrier system in platform-basin transitional area of Tarim basin and future exploration

Zhang Dajing1,2, Wang Yingming1, Xiao Zhigao3, Wu Maobing2, Zheng Menglin2, Zhang Weibiao2   

  1. 1. Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249;
    2. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083;
    3. Development Department, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 840001
  • Received:2005-11-10 Online:2006-10-25 Published:2012-01-16

Abstract:

The Paleozoic is the main exploration target in Tarim basin.An analyze on the distribtuion of the hydrocarbon carrier beds,unconformity surfaces,and conductive faults in the Paleozoic,shows that a good carrier system is formed in the platform-basin transitional area by the Ordovician carbonate carrier bed,Devonian sandstone bed,and the Caledonian and Hercynian unconformity surfaces and faults.The units of hydrocarbon migration and accumulation are also recognized on top of the Middle-Lower Ordovician for the main reservoiring period in the late Hercynian.Based on the spatial arrangement of the migration and accumulation units,the carrier system and the thermal evolution of effective source rocks,a comprehensive evaluation is carried out on the migration and accumulation efficiency of the units.It is further proposed that the Shaxi-Akekule swell,Taozhong I fault zone,and area surrounding well Taozhong-10 and Tazhong-1,be the future exploration targets in the platform-basin transitional area,and three areas,namely the two plunges of the central uplift,the Manxi area,and the northern Awati depression,be worth of much attention during the exploration.

Key words: carrier system, migration and accumulation unit, large oil and gas fields, exploration direction, plat-form-basin transitional area in Tarim basin

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