分段变密度射孔水平井底水入流规律研究  

Research on inflow profile of horizontal well with selective & variable density perforation completion

作　　者：王妍妍[1,2] 杜殿发[2] 隋普森 夏曦 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石油大学(华东)石油工程学院,山东青岛266580 [3]中国石化胜利油田分公司胜利采油厂,山东东营257000

出　　处：《水动力学研究与进展（A辑）》2017年第2期220-227,共8页Chinese Journal of Hydrodynamics

摘　　要：分段变密度射孔是目前水平井开发底水油藏非常重要的一类完井方式,而底水脊进模型的分析计算是进行完井优化的理论基础。该文以分段和变密度两类射孔方式下的水平井为研究对象,在稳态产能模型的基础上,结合活塞式驱油原理,建立了精细考虑每个孔眼中的流体流动、井筒压降及避射段影响的底水脊进模型,刻画水脊形态,研究底水突破模式。研究结果表明改变沿井筒方向上射孔密度的分布,可以调节入流剖面形状,跟段密的射孔类型能使入流剖面较均匀,可以用来延长底水突破时间;而水平井筒上布置避射段,单个生产段的底水突破模式与单个水平井类似,并可以进行出水层段的封堵。Selective or variable density perforation completion water reservoir as an important completion style of horizontal well. has already been introduced to the development of bottom Analysis and calculation of bottom water cresting model is the basis of optimism and design for horizontal well. In this paper, a bottom water cresting model have been established on the basis of the coupling steady-state production evaluation model, which carefully considers influence of fluid flow in every single perforation, the pressure drop along wellbore and existence of free-perforation segments. For this model, the water flooding process in the vertical direction has been viewed as piston mode, and it can be used to analyze bottom water breakthrough mode of horizontal well with selective or variable density perforation completion. Research shows that inflow profile of bottom water can be adjusted by changing the distribution of perforation. And the perforation style with more perforation near the horizontal well heel could make the inflow profile more homogeneous and prolong productive life of horizontal. As for the selective perforation completion, the breakthrough mode of every single productive segment has the similar style with that of the whole horizontal well, and it can be used to cement some segments with water breakthrough.

关 键 词：分段射孔 变密度完井 产能模型 底水突破模式 入流剖面 

分 类 号：TE341[石油与天然气工程—油气田开发工程]