菱形联合井网整体压裂电模拟实验研究  

Electrical Simulation Experiment of Integral Fracturing of Diamond Combined Well Pattern

作　　者：于姣姣[1,2] 贾宗文[3] 曲占庆[2] 张滨海[1] 李乐忠[1] 唐颖[1] 

机构地区：[1]中海石油气电集团有限责任公司技术研发中心,北京100027 [2]中国石油大学(华东),青岛266555 [3]中海油研究总院,北京100027

出　　处：《科学技术与工程》2013年第29期8612-8617,共6页Science Technology and Engineering

基　　金：山东省自然科学基金(ZR2012EEM001);国家自然科学基金项目(50904076);中国海油青年科技与管理创新课题(JZTW2012KJ45)资助

摘　　要：目前国内大部分油田已处于开发后期,地层能量不断衰竭,了解地层流体的渗流规律、对现有开发井网进行改造,能有效提高地层能量和区块产量。根据现有直井井网的布井方法,考虑水平井压裂的特点,优化设计了菱形联合压裂井网;并运用电模拟的方法,模拟不同井网和裂缝参数对水平井整体压裂井网的渗流规律及产能的影响。结果表明,改进后的菱形联合井网注水压力波及范围扩大,注水效率提高,能明显提高单井产量;裂缝长度增加有利于注水效率的提高,但裂缝过长会造成水驱前缘突进的现象,不利于油井的生产;裂缝方位对注水效率的影响随裂缝长度的增大而增大,且裂缝方位为垂直时注水效果最好。研究成果对水平井菱形联合井网整体压裂设计具有一定指导意义。Nowadays,most of the fields have been in the late of the development and the formation energy is exhausted.Understanding well pattern＇ s seepage law and transforming the existing well patterns can improve the formation energy and increase their output effectively.In order to satisfy the need of the field development,some normal vertical well patterns,such as diamond well pattern,are transformed into horizontal-vertical well pattern and fractured.Based on principle of hydroelectricity similarity,using electrical simulation experiment,different well patterns＇ seepage law and the impact of different fracture parameters are simulated.The results show that the scope of diamond combined well pattern＇ s water injection pressure is expended and water injection efficiency is improved,and it can improve the productivity obviously.The increase of fracture length is also positive to water injection efficiency,but it can＇t be too long,or it will result in the front of water flooding onrush,which is not good for productivity.When the fracture length is small,fracture angle has little effect on water injection efficiency,with the increase of the fracture length,the effect increases,and the water injection efficiency is the best when the fracture is vertical.The research has a certain significance on the design of integral fracturing of horizontal combined well pattern.

关 键 词：菱形联合井网 水平井 整体压裂 渗流规律 电模拟 

分 类 号：TE357.14[石油与天然气工程—油气田开发工程]