矩形井网整体压裂技术在浅层油藏适应性研究  

Adaptability Research in Hydraulic Fracturing for Rectangular Pattern

作　　者：韩秀玲[1] 张士诚[1] 马新仿[1] 孙侃[1] 邹春梅[2] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]中国石油勘探开发研究院廊坊分院,廊坊065007

出　　处：《科学技术与工程》2010年第11期2705-2708,共4页Science Technology and Engineering

摘　　要：针对浅层油田的地质特点,在充分分析区块注采系统、油层地应力场以及油层裂缝发育情况的基础上,利用水力压裂整体优化设计软件,对矩形井网、正方形反九点井网和菱形反九点井网有利裂缝方位在油田的适应性进行了对比研究。确定最优整体压裂方案,争取最少的投入,获得最好的措施效果,以期在该区块实现整体高效开发。研究表明,矩形井网较适合于此油田。在此基础上,研究了矩形井网在不同井距和排距条件下缝长比和导流能力变化对压裂井日产油量和累积产油量这些开发指标的影响。研究结果表明:对于矩形井网,井距一定,压裂效果并非排距、缝长比和导流能力越大越好,而是存在一个合适的范围。导流能力40μm2·cm较好;缝长比0.1—0.2,井排距300m×250m较好;缝长比0.2,井排距400m×300m较好。In view of geology feature in superficial layer of oil field, the adaptability of rectangular pattern by hydraulic-fracturing integral fracturing optimization design software in this area is studied. Considering the change of ratio of fracture length to distance between wells and flow conductivity under different well array, it calculates such development indexes as daily rate and cumulative production. Moreover it discusses the adaptability of rectan- gular pattern, the reverse rhombus 9-spot and reverse square 9-spot. The results shows that for the rectangle pattern with fixed well spacing, it is not necessary that larger well array, larger ratio of fracture length to distance between Therefore rectangle pattern is suited in oilfield. The best proportion is, fracture conductivity about 40 μm^2·cm, when ratio of fracture length to distance between well is 0.1 ,the well line and well spacing about 300 m ×250 m,if it choose O. 2, the well line and well spacing may about 400 m × 300 m.

关 键 词：整体压裂 矩形井网 浅层油藏 导流能力 缝长比 优化 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]