Journal of Jilin University(Earth Science Edition) ›› 2017, Vol. 47 ›› Issue (5): 1341-1351.doi: 10.13278/j.cnki.jjuese.201705102

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Migration of Oil in Tight Sandstones:Discussion from the Dynamics

Zhang Huanxu1, Chen Shijia1,2, Lu Jungang1,2, Liu Chaowei3, Chen Juan4, Li Yong2, Xu Kun2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu 610500, China;
    2. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
    3. Petroleum Exploration and Development Institute of Xinjiang Oil Field, CNPC, Karamay 834000, Xinjiang, China;
    4. Petroleum Exploration and Development Institute of Changqing Oil Field, CNPC, Xi'an 710018, China
  • Received:2016-12-12 Online:2017-09-26 Published:2017-09-26
  • Supported by:
    Supported by the Major State Basic Research Development Program ("973" Program) of China (2014CB239005), the National Natural Science Foundation of China (41502146) and the Science and Technology Innovation Project of CNPC (2015D-5006-0101)

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Abstract: A research was conducted on the differences between tight sandstones and normal sandstones of the oil charging dynamics through the analysis of dynamic characteristics and its effects on oil migration. The tight oil migration distance and accumulation mechanism were also discussed. In addition, we analyzed the effect of mudstone barriers and fractures on oil accumulation in tight sandstones, and concluded that:in tight sandstones, mudstone barriers can block oil migration, and lead to the blank-zones near the barriers; the sand bodies directly contacted with fractures are the most possible targets for oil accumulation.

Key words: tight oil, migration dynamics, hydrocarbon accumulation, mudstone barriers, fractured reservoir of tight sandstones, reservoir

CLC Number: 

  • P613.8
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