摘要
为提高多层系致密气藏单井产量,2009年开始长庆气田在国内率先开展了TAP分层压裂工艺试验,但受压裂工具及施工作业条件影响,施工成功率低,工艺稳定性较差。为提高该项工艺的稳定性和适应性,提出了有限级套管滑套设计思路,结合有限元数值模拟和大型物理模拟实验优化了滑套阀端口,实现了固井条件下非射孔诱导顺利起裂,同时研发配套了变径自锁复合胶塞和水溶性金属球等工具,形成了有限级套管滑套分层压裂工艺,现场试验24口井,实现了一次连续分压7层的突破,施工成功率90%,其中苏里格致密气试验区苏东X井试气绝对无阻流量8.80×104m3/d,投产32个月时日产气1.94×104m3,与邻井相比增产达到80%以上,为长庆气田致密储层实现体积压裂、提高单井产量提供了新的技术手段。
In order to further improve the per-well production,the TAP separate layers fracturing technology was developed and tested in Changqing oilfield since 2009 based on investigating multilayer reservoir fracturing technologies at home and abroad,certain understanding was obtained. To improve the adaptability of the TAP technology, a limited casing sliding sleeve fracturing technology was formed by studying key tools and corresponding matching technology since 2012,and it could realize continuous separate layers fracturing 7 layers once. Field application results in 24 wells showed that the fracturing success rate was increased, and the remarkable increase production effect was obtained. The casing sliding sleeve fracturing technology provided the technical means for the volume fracturing of tight reservoir and improving per-well production in Changqing gas field.
出处
《钻采工艺》
CAS
北大核心
2015年第4期61-64,9,共4页
Drilling & Production Technology
关键词
套管滑套
数值模拟
物理模拟
可溶球
casing sleeve,numerical simulation,physical simulation,soluble ball
