反九点井网非活塞式水驱面积波及系数计算方法  

Calculation method of area sweep efficiency of non-piston water flooding for inverted 9-spot pattern

作　　者：孙强 周海燕 胡勇 石洪福 王记俊 SUN Qiang;ZHOU Haiyan;HU Yong;SHI Hongfu;WANG Jijun(Tianjin Branch,China National Offshore Oil Corporation(CNOOC)Limited,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《复杂油气藏》2018年第2期52-56,65,共6页Complex Hydrocarbon Reservoirs

基　　金："十三五"国家科技重大专项"渤海油田加密调整及提高采收率油藏工程技术示范"(2016ZX05058001)

摘　　要：为解决普通稠油油田反九点井网的油藏工程设计和评价问题,基于流管法和油水两相非活塞式水驱油理论,建立了一套考虑稠油启动压力梯度下反九点井网面积波及系数的计算方法。以渤海某稠油油藏为例,利用该方法分析了启动压力梯度、注采压差和注采井距对普通稠油油藏面积波及系数的影响。结果表明,当原油粘度较大时,反九点井网中存在无法动用的死油区,导致平面波及程度低,可通过提液、增大注采压差或井网加密的方式提高注入水的波及程度。In order to solve the problems in the design and evaluation of reservoir engineering of inverted 9-spot pattern for conventional heavy oilfields,based on the stream-tube method and the non-piston water oil displacement theory,it was established a method for calculating the areal sweep efficiency of inverted 9-spot pattern considering the starting pressure gradient.Taken a heavy oil reservoir in Bohai as an example,the influence of starting pressure gradient,well spacing and injection-production pressure difference on the areal sweep efficiency was analyzed by using the method.The case study showed that the dead-oil zone exits in the inverted 9-spot pattern when the viscosity of crude oil is higher,resulting in lower area sweep efficiency,which can be solved by raising liquid production or pressure difference between injection and production wells,and infilling well pattern.

关 键 词：普通稠油 启动压力梯度 非活塞式驱替 面积波及系数 流管法 反九点井网 

分 类 号：TE325[石油与天然气工程—油气田开发工程] TE345