【摘 要】
：
According to the characteristics of water flooding development in low permeability reservoirs,on the basis of flow pipe model,considering threshold pressure gradient and threshold coefficient,we use s
【机 构】
：
Southwest Petroleum University,Chengdu,China;Shaanxi Yanchang Petroleum company limited,Yan'an,Chin
【出 处】
：
2017年第五届数字油田国际学术会议(DOFIAC2017)
论文部分内容阅读
According to the characteristics of water flooding development in low permeability reservoirs,on the basis of flow pipe model,considering threshold pressure gradient and threshold coefficient,we use streamline integral method and unit analysis method to derive a Non-Darcy flow productivity model of rhombus inverted five-spot well pattern in low permeability reservoirs.And further,analyze the response time and the relationship between long-axis well spacing and short-axis well spacing.Case study shows that when long-axis well spacing is constant,with the increase of injection-production pressure difference,the short-axis well spacing decreases,meanwhile the production goes up gradually; when injection-production pressure difference is constant,based on the opening angle,we can obtain the rational long/short axis well spacing,and reasonable productivity of rhombus inverted five-spot well pattern in low permeability reservoirs development.
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