CobraMax压裂工艺在低渗气藏的应用

针对苏里格气田现有的分层压裂工艺在薄而多气层段井有效开发方面存在的局限性,长庆油田通过与哈里伯顿公司合作在苏东X井开展了国内第1口CobraMax压裂试验。该技术打破了常规套管射孔,油管连入分层工具,完成3～4层的多层压裂工艺思路,提出了通过连续油管水力喷砂射孔,从环空进行主压裂施工,通过砂塞分隔各压裂层的一种分层改造工艺理念,其最大优势在于改造层数多,可最大限度提高储层纵向动用程度,同时可减少多层射孔费用,有效降低整井费用。2010年该技术在长庆油田成功实施,取得了很好的效果,为国内低压、低产、多层系气田开采提供了借鉴。

Application of CobraMax fracturing technology in low permeability gas reservoirs

The technology of separate zone fracturing has some limitations for effective development of the thin multilayer gas reservoirs in the Sulige gas field.The first CobraMax fracturing test has been carried out in Sudong X well by Changqing Oilfield Company through cooperation with Halliburton.Different from conventional multilayer fracturing technology which performs casing perforating through running in layer isolation tool conveyed by tubing to finish 3~4 layers,the CobraMax technology uses coiled tubing fo...