油气地质与采收率2012，Vol.19Issue(1)：95-98,4.
底水油藏水平井沿程水淹识别
摘要
Abstract
The fluctuation of water breakthrough along horizontal wells is mainly caused by the heterogeneity of the formation and the wellbore pressure drop. In this paper, Buckley-Leverett's principle on displacement of oil with water and wellbore pressure drop equation are used to establish a coupling model,from which we can get the water cut in well head with different distributions of permeability .between the variable mass flow in horizontal wellbore in bottom-water drive reservoir and the two phase flow in the formation. To study the affecting factors on water breakthrough of horizontal wells,sensitivities of the size,the width and the position of high permeability zone are analyzed. We establish the geological model by the actual parameter of some well in Tahe oilfield. We change the position of high permeability zone and plot a chart formed by curves of the relationship between water cut and time in all cases, and then the right position of high permeability zone is located by comparing the actual curve with the chart. The result shows that position of the high permeability zone is the main factor that affects water cut of horizontal well head and can be approximately obtained through the water cut curve. Plugging off the high water cut zone can also slow down the bottom-water coning in heel of horizontal well and decrease the water cut of well head.关键词
底水油藏/水平井/水淹/井筒压降方程/高渗透带/两相流/变质量流Key words
bottom-water reservoirs/horizontal wells/waterflooding/B-L function/high permeable zone/tow-phase flow/mass variable flow分类
能源科技引用本文复制引用
郑强,刘慧卿,薛海庆,李媛媛,王长久..底水油藏水平井沿程水淹识别[J].油气地质与采收率,2012,19(1):95-98,4.基金项目
国家科技重大专项"蒸汽驱后稠油油藏提高采收率技术研究"(2011ZX05009-004-05). （2011ZX05009-004-05）
