穿越多条裂缝水平井的井底压力变化特征  

Pressure Behavior of Horizontal Well with Multiple Transversal Fractures

作　　者：刘振宇[1] 方亮[1] 安艳明[2] 翟云芳[1] 

机构地区：[1]大庆石油学院,黑龙江大庆163318 [2]中国石油大庆油田有限责任公司第二采油厂,黑龙江大庆161318

出　　处：《新疆石油地质》2003年第4期341-343,共3页Xinjiang Petroleum Geology

摘　　要：研究了水平井在穿越多条裂缝条件下的渗流规律。在假设各裂缝流量不相等的条件下,给出了地层及裂缝内的压力分布公式,在假设各裂缝流量相等的条件下,绘制了井底压力理论曲线。理论曲线表现出3个流动时期的流动特点,即,早期裂缝线性流,地层向裂缝和裂缝向井筒的不稳定流和系统趋向于平衡的稳定流,同时表明了裂缝长度和间距对压力的影响。研究还表明,穿越多条裂缝的水平井在早期的井底压力特征与垂直裂缝直井的情况相似。The flow mechanism of Horizontal well wi th multiple transversal fractures is studied.Under the assumption of variable f low rate be-tween transversal fractures,theoretical curves of bottom hole pres sure are given,which show flow characteristics of three periods:the first one represents the linear flow in fractures;the second one the instantaneous flow f rom strata to fractures and from fractures to the wellbore;and the third one th e stable flow of the system equilibrium.They also indicate the effects of fract ure length and fracture spacing on the wellbore pressure.In addition,study sho ws that at early stage,the bottom hole pressure behavior of horizontal well wi th multiple transversal fractures is similar with that of vertical well with ver tical fractures.

关 键 词：裂缝 水平井 井底压力 渗流 低渗透油田 

分 类 号：TE312[石油与天然气工程—油气田开发工程]