西南石油大学学报(自然科学版) ›› 2013, Vol. 35 ›› Issue (2): 115-120.

• 石油与天然气工程 • Previous Articles     Next Articles

Novel Well Pattern for Fractured Horizontal Well in Ultra-lowPermeability Reservoir

Zeng Baoquan1, Cheng Linsong2, Qi Mei1, Li Chunlan2   

  1. 1. Department of Overseas New Ventures Assessment，PetroChina Research Institute of Petroleum Exploration & Development，Haidian，Beijing 100083，China2. College of Petroleum Engineering，China University of Petroleum，Changping，Beijing 102249，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2013-04-01 Published:2013-04-01

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Abstract: A novel well pattern was presented for fractured horizontal wells in ultra-low permeability reservoir，considering
geomorphological features and permeability anisotropy of Changqing Oilfield. The feasibility of novel well pattern was demonstrated
on drilling and development. The cluster well technology can guarantee the successful drilling and completionon of the
fractured horizontal wells. Development of novel well pattern in the interlacing well pattern，rectangular pattern and rhombic
inverted nine-spot pattern was evaluated by reservoir numerical simulation about average well production，oil recovery，water
cut and sweep area. The results show that novel well pattern and conventional well pattern has the same development effectency
in the interlacing well pattern；the novel well pattern in the other two patterns can effectively reduce the water cut in the sweep
area of 30 years and the degree of reserve recovery enhance 6.00% and 10.00%，recovery 0.96% and 1.6%. respectively，and
the final recovery 1.05% and 1.50%（when water cut =95%）.

Key words: ultra-low permeability reservoir, fractured horizontal well, well pattern, sweep area, reservoir numerical simulation