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《Journal of Harbin University of Science and Technology》 2016-01
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A New Method to Calculate Well Pattern Productivity in Low Permeable Reservoir

LIU Hai-long;WU Shu-hong;Oil and Gas Field Development Software Center,Research Institute of Petroleum Exploration and Development;State Key Laboratory of Enhanced Oil Recovery;  
In low permeability reservoirs,it is difficult for the reservoir fluid to flow,and the recovery factor is very low. Based on the non-Darcy flow in low permeability reservoir,taking threshold pressure gradient into consideration,in this paper,we build a new method to calculate the well pattern. This method is based on the two-parameter continuous model,and the method of flow line integrals and the numerical integration were used to build the productivity model. By introducing the effective threshold coefficient,the relationship between the effective threshold coefficient and the well spacing was established. What's more,the effect of the well spacing and the water injection differential pressure on the productivity and effective threshold coefficient were analyzed. The studies show that: the larger the well spacing is,the lower the yield production is,and the lower the effective threshold coefficient is. Reducing well spacing is good for the low permeability reservoir development and can improve the recovery factor.
【Fund】: 中国石油集团重大科技专项(z121100004912001)
【CateGory Index】: O175
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