Oil & Gas Geology ›› 2007, Vol. 28 ›› Issue (4): 520-522.doi: 10.11743/ogg20070413

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Experiment of low-tension system for improving percolation behaviors in waterflooding low-permeability reservoirs

Lai Nanjun1,2, Ye Zhongbin2, Chen Hong2, Luo Pingya2   

  1. 1. Graduate School of Southwest Petroleum University, Chengdu, Sichuan 610500;
    2. State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500
  • Received:2007-06-08 Online:2007-08-25 Published:2012-01-16

Abstract:

Waterflooding performs poorly in low-permeability reservoirs due to their low absorbing capacity and gradually increasing injection pressure.This paper takes T oilfield,a low-permeability oilfield under waterflood development program,as an example to illustrate the development of a Low-Tension System for improving waterflooding effectiveness in low-permeability reservoirs.Lab experimental result shows that the system can effectively reduce residual oil saturation,increase oil/water two-phase common seepage intervals,improve percolation behaviors,and thus enhance waterflooding efficiency in low-permeability reservoirs.

Key words: low-tension system, injection pressure, relative permeability, percolation behavior, low-permeability reservoir

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