底水油藏水平井水脊脊进规律  

Water Coning Laws of Horizontal Well Production in Bottom Water Reservoirs

作　　者：刘振平[1] 刘启国[1] 王宏玉[1] 袁淋[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500

出　　处：《新疆石油地质》2015年第1期86-89,共4页Xinjiang Petroleum Geology

基　　金：国家973项目(2011CB201005)

摘　　要：利用油气藏数值模拟软件,研究了水平井底水突破的位置。根据水平井的产量公式,推导出与垂面径向流的渗流阻力相应的生产压差。假设垂面上的生产压降满足对数分布,可得到考虑重力影响的底水脊进速度公式,并推导出油井的见水时间方程。最后,用实例验证了该方法的可靠性。研究表明,底水首先从水平井中部突破,并且随着生产时间的延长,底水脊进的速度会加快。合理增大水平井的水平段长度和避水高度,可以推迟油井的见水时间。The position of the bottom water breakthrough in horizontal well production was studied by means of the reservoir numerical sim-ulation software. Based on the production formulas for horizontal wells, the production pressure difference corresponding to the verticalplane radial seepage resistance was deduced. Assuming the vertical plane production pressure drop to satisfy the logarithmic distribution,the bottom water coning rate with consideration of effect of gravity can be obtained, by which the equation of water breakthrough time of oilwell is derived.This method＇s reliability was verified by the case study. The research shows that bottom water breakthrough starts from themiddle of horizontal well section, and the longer the production time, the faster the rate of bottom water coning. Reasonably increasing thelength of horizontal well section and the height of water avoidance can postpone the time of water breakthrough in oil wells.

关 键 词：底水油藏 水平井 水脊 脊进速度 见水时间 

分 类 号：TE341[石油与天然气工程—油气田开发工程]