底水油藏中水平井的合理位置优化研究  

Optimum Vertical Location of Horizontal Wells in Reservoir with Bottom Water

作　　者：张厚青[1] 刘冰[1] 徐兴平[2] 李继志[2] 

机构地区：[1]中国石油大学(华东)物理科学与技术学院,山东东营257061 [2]中国石油大学(华东)机电工程学院,山东东营257061

出　　处：《青岛大学学报（工程技术版）》2011年第4期68-72,共5页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：山东省自然科学基金资助项目(Y2008F17);中国石油大学研究生创新基金项目(s10-29);中国石油大学(华东)自主创新项目(11CX04061A)

摘　　要：底水油藏中水平井的合理位置能提高水平井开发效果,是确保水平井稳产和延长无水采油期的关键。依据底水油藏水平井产能方程、临界产量公式和见水时间公式,综合考虑水平井位置对水平井产量、临界产量和见水时间的影响,结合多目标最优化理论,建立了以底水油藏水平井位置为优化变量,以水平井产量、临界产量和见水时间为目标函数的多目标优化模型,提出了水平井合理位置的优化方法。结果表明,底水油藏中水平井的合理位置到底水边界的距离约为油藏厚度的0.3～0.45倍;垂向渗透率高的薄底水油藏中较小内径的水平井有利于产量的提高。其结果对底水油藏水平井的优化设计具有一定的指导意义。Optimum vertical location of horizontal wells in bottom water reservoir can enhance the effective exploitation of horizontal wells, stabilize the production and prolong production time without water. Based on the production equation, critical production formula and water breakthrough time formula, comprehensive effects of horizontal well location on production, critical production and water breakthrough time are studied. From the theory of multi-objective optimization, a multi-objective optimization model is proposed, in which the production, critical production and water breakthrough time of the horizontal well are treated as an objective function and the vertical location of the well as a decision-making variable. The results show that the distance between the optimum vertical location of the well and the bottom water boundary of the reservoir is 0.3 to 0.45 times as the thickness of the reservoir; a smaller radius of a horizontal wellbore assists in improving the production of the well in a thin reservoir with bottom water and higher vertical permeability. The results provide the guidance for design of horizontal wells in bottom water reservoir.

关 键 词：底水油藏 水平井 垂向位置 多目标优化 

分 类 号：TE349[石油与天然气工程—油气田开发工程]