缝内转向技术在老井缝网压裂中的应用  

APPLICATION OF FRACTURING TURNAROUND TECHNOLOGY IN OLD WELLS CRACK NETWORK FRACTURING

作　　者：张弢[1,2] 李文彬[1,2] 刘亭[3] 

机构地区：[1]川庆钻探公司钻采工程技术研究院 [2]低渗透油气田勘探开发国家工程实验室 [3]长庆油田分公司第二采油厂

出　　处：《钻采工艺》2016年第4期41-44,3-4,共4页Drilling & Production Technology

摘　　要：缝网压裂技术是通过大规模压裂模式,形成裂缝网络,显著提高单井产量,已成为近些年新井初期改造的主体技术。基于缝网压裂的增产优势,将其引入老井措施,受制于储层和井网条件等方面限制,在改造中存在一定的局限性。为解决此问题,将"缝内转向"技术思路应用在老井缝网压裂中,通过转向剂的缝内桥堵、升压作用,开启微裂缝,控制主缝长,形成人工裂缝与天然裂缝交接的裂缝网络,增大改造体积。在长庆油田现场应用256井次,取得良好的增产效果。Crack network fracturing technology has become the main technology of the new wells initial stimulation,which can form fracture network and significantly improve the single well production through large-scale fracturing pattern.Based on the advantages of fracture network fracturing,this technology was introduced in old wells stimulation.But the network fracturing technology had some limitation for the constraint of the reservoir and well pattern condition.To solve this problem,the fracturing turnaround technology was used in old wells crack network fracturing.Fracturing turnaround technology could open micro fracture and control main crack length through bridge plugging and boosting of diversion agent,and then form the fracture network of artificial fracture and nature fracture,increase reconstruct volume.The technology was applied 256 well times in Changing Oilfield,which obtained favorable stimulation effect.

关 键 词：缝内转向 缝网压裂 老井压裂 现场应用 

分 类 号：TE357[石油与天然气工程—油气田开发工程]