Shangxi Coalbed Methane Branch,PetroChina Huabei Oilfield Company

针对有杆举升工艺在大斜度煤层气井排采中无法应用的问题,提出了无杆管式泵和射流泵无杆举升工艺技术,并在沁水煤层气田进行了应用;2种工艺均采取中心管的管柱结构,通过地面设备将水变成高压动力液,以高压水代替抽油杆作为驱动介质,实现排液。现场应用无杆管式泵排采8口井,射流泵排采2口井,最大下泵深度达到1 360.4 m,最大倾角达到90.88°,2种工艺井筒均加装气锚防止窜气影响,优化了地面排采设备,降低了故障率,杜绝了杆管偏磨问题。结果表明:2种无杆排采工艺平均排采时率达到95%以上,运行平稳,实现了煤层气水平井连续稳定排采。

According to the rod lit technology could not be applied to the drainage of high inelined calbed methane wel.a redless ubing pump and jet pump roess ifting technicue were provided and were appied to Qishui Coalbed Methane Field. The two technique both wout have a pipestring structure of the central pipe.Wwith the suriace equipment water would be changed to a high pressurzed power lioud.,the high pressure water would replace the ail sucking rod as the driving medium trelize the liquid rainage. The rodless ubing pump was appied to drain eight wels and the jet pump was appied to drain two we s: The max pump depth was 1 360.4m and a max well nclination was 90.8 " The two fechniques oth would equpoment with the gas anchors to prevent gas breastnough infuences.The surace drainage :cquipment was optimized,the faultrate was reduced and the of-cener weaing problems of the rod and pipe were eliminated.The results showed that the average drainage time eiciency of the two rolless drainage techniques would be over 95%,the operaton was stable and a continuous stable drainage of th caled nethane well was realized.

国家科技重大专项资助项目(2011ZX05061)；