塔河油田膨胀管井钻井技术

Expandable tubular drilling technology in Tahe Oilfield

胥豪 崔海林 张玲 董志辉 刘建刚

XU Hao CUI Hailin ZHANG Ling DONG Zhihui LIU Jiangang

胜利石油工程有限公司钻井工艺研究院，山东东营　257017

Drilling Technology Research Institute, Shengli Petroleum Engineering Co., Ltd., SINOPEC, Dongying 257017, China

塔河油田奥陶系碳酸盐储层石油资源丰富，随着开采周期的延长，采出量的增加，开采成本也相应增加，老井侧钻是降低油气开发成本的有效途径之一，但塔河油田受制于井眼尺寸、避水要求、不稳定泥岩、复杂的压力体系等原因，套管开窗侧钻难度极大。鉴于膨胀管技术在处理复杂地层和压力体系方面具有独特的优势，并可节约套管层次，因此在塔河油田进行了3口井试验，均取得成功。对3口试验井情况进行了总结，对井身结构设计、井眼轨道设计、套管开窗方式、扩眼方式、钻具组合和钻井参数等进行了详细的阐述，试验证明膨胀管技术能够解决该区块侧钻井面临的难点，对于老井改造具有重要意义，但还需加强配套工具设备研制，以进一步提高膨胀管钻井经济性。

Carbonate reservoirs in ordovician strata of Tahe Oilfield are rich in hydrocarbon resources. With the extension of production cycle and the increase of oil production, the cost of development increases accordingly. Sidetracking technique on old wells is one of the most effective ways to reduce the cost of oil and gas development. However, window milling and sidetracking in Tahe Oilfield is difficult, because of the limited hole size, water avoidance requirement, unstable mudstone and complicated pressure system, etc. In view of expandable tubular technology has advantage in dealing with complex formation and pressure system and reducing casing program, it has been deployed on three pilot wells in Tahe field with success. The paper analyzed the casing program, hole trajectory, casing window, reaming method, drilling assembly and drilling parameter of three pilot wells. The tests show that the expandable tubular technology can solve the difficulties in this area, and has great significance for old well reformation. But the research of supporting tools should be enhanced to further improve the economical efficiency.