CAJ | 학술논문

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。
탑하유전오도계탄산염저층석유자원봉부，수착개채주기적연장，채출량적증가，개채성본야상응증가，로정측찬시강저유기개발성본적유효도경지일，단탑하유전수제우정안척촌、피수요구、불은정니암、복잡적압력체계등원인，투관개창측찬난도겁대。감우팽창관기술재처리복잡지층화압력체계방면구유독특적우세，병가절약투관층차，인차재탑하유전진행료3구정시험，균취득성공。대3구시험정정황진행료총결，대정신결구설계、정안궤도설계、투관개창방식、확안방식、찬구조합화찬정삼수등진행료상세적천술，시험증명팽창관기술능구해결해구괴측찬정면림적난점，대우로정개조구유중요의의，단환수가강배투공구설비연제，이진일보제고팽창관찬정경제성。
Carbonate reservoirs in ordovician strata of Tahe Oilifeld are rich in hydrocarbon resources. With the extension of pro-duction 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 Oilifeld is dififcult, 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 ifeld 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 dififculties in this area, and has great signiifcance for old well reformation. But the research of supporting tools should be enhanced to further improve the economical efifciency.