西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (3): 101-104.

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

Research on Advanced Water Injection Well Pattern Adaptability in Ultra-Low Permeability Reservoir

ZHANG Lie-hui 1 ZENG Yang 1 ZHOU Zhi-ping 2 LIU Xin 1 ZHOU Yuan 1
  

  1. 1. State Key Laboratory of Reservoir Geology and Exploitation_Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. PetroChina Changqing Oilfield Company No. 2 Recovery Technique Service Development, Qingyang, Gansu 745100, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-06-20 Published:2011-06-20

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Abstract: Chang63 reservoir of B153 area is an ultra-low permeability reservoir, in which low single-well production and oil production depletes seriously, and it’s very difficult to maintain stable production. Advanced water injection is being adopted in this reservoir currently, but the effect is not apparent, and single-well production has not improved significantly. Reservoir engineering and numerical simulation method are used in this paper，and combining with current well pattern and well space, we analyze the reasons why advanced water injection is not ideal. The result indicates current well space is too large, and the injected water can only stabilize the pressure but can’t drive the oil, so the well pattern should be appropriately adjusted. Its reasonable well spacing is 258 m, row spacing is 152 m according to calculation. Square anti-nine-spot pattern in the early time and then adjust to five-spot pattern at the late period of development are suggested. The study can be used for reference in arranging reasonable well spacing

to make effective development in similar reservoirs.

Key words:

ultra-low permeability, advanced water injection, well pattern and spacing, numerical simulation

CLC Number: