含裂缝的菱形反九点井网面积波及效率研究  

The areal sweep efficiency of invert 9-spot pattern of with fracture

作　　者：张媛[1] 唐海[1] 吕栋梁[1] 钟家峻[1] 王胜华[2] 邓筑井[1] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]中国石油长庆油田分公司第二采油厂,甘肃庆阳745100

出　　处：《石油化工应用》2013年第5期8-13,共6页Petrochemical Industry Application

基　　金：国家科技重大专项"大型油气田及煤层气开发";项目编号:2011ZX05013-005

摘　　要：根据低渗透油藏面积注水开发特点,在流管模型和Beckley-Leverett方程的基础上,从理论上推导了考虑启动压力梯度的含裂缝菱形反九点井网面积波及效率和油井见水时间的计算公式,解决了低速非达西渗流不同于达西渗流的面积波及效率理论计算问题和生产井见水时间的确定问题。研究表明,裂缝与注采方向夹角的大小对菱形反九点井网的面积波及效率有较大的影响,因此要综合考虑各个因素,从而为低渗透油藏菱形反九点井网的开发设计和评价提供了理论依据。Based on the characteristics of the pattern water flooding exploitation in low-per- meability reservoir and the stream tube model and the Beckley-Leverett equation,and by tak- ing the start-up pressure gradient into consideration,we establish the areal sweep efficiency formula and water breakthrough time formula the invert 9-spot pattern with fracture. The formula help solve the theoretical problem of calculation of areal sweep efficiency formula and establishment of water breakthrough time of low-speed non-Darcy seepage flow,which is different from darcy seepage flow. The results show that the size of the angle between frac- ture and injection-production direction has a large impact on the areal sweep efficiency of the invert 9-spot pattern with fracture, so we need consider various factors comprehensively. The research provides theory basis for development and evaluation of low-permeability reser- voir.

关 键 词：启动压力梯度 非达西渗流 裂缝 菱形反九点井网 见水时间 面积波及效率 

分 类 号：TE319[石油与天然气工程—油气田开发工程]