CAJ | 학술논문

塔河油田地质情况复杂，岩性差异大，地层压力变化大，局部区域有高压盐水层和膏盐层，开孔尺寸受限，给钻井工程带来诸多技术难题。针对这些难题，提出了坐封斜向器开窗侧钻、定向随钻扩眼、膨胀管和小井眼水平井钻井技术。 TK7-640CH井的钻井实践表明，以上技术在塔河油田奥陶系饱177.8 mm套管开窗侧钻水平井的应用具有可行性，能够封隔复杂地层和异常压力系统。就侧钻井技术难点和技术方案的可行性进行了探讨和分析，总结该井实钻所取得的成功经验，为塔河油田老井的恢复及再生提供了技术支撑。
탑하유전지질정황복잡，암성차이대，지층압력변화대，국부구역유고압염수층화고염층，개공척촌수한，급찬정공정대래제다기술난제。침대저사난제，제출료좌봉사향기개창측찬、정향수찬확안、팽창관화소정안수평정찬정기술。 TK7-640CH정적찬정실천표명，이상기술재탑하유전오도계포177.8 mm투관개창측찬수평정적응용구유가행성，능구봉격복잡지층화이상압력계통。취측찬정기술난점화기술방안적가행성진행료탐토화분석，총결해정실찬소취득적성공경험，위탑하유전로정적회복급재생제공료기술지탱。
The geological conditions are complex with large lithology difference and stratum pressure difference in Tahe oil-field, there are local high pressure brine zone and gypsum salt bed, the hole size is restricted, which bring many technical difficulties for drilling engineering.Aiming at these problems, sidetracking by setting whipstock, directional ream while drilling, expansion tube and slim-hole horizontal well drilling technology were put forward.TK7-640CH drilling practice shows that the above technologies are feasible in the application for?177.8mm casing whipstock sidetracking horizontal well in ordovician of Tahe oilfield, can seal complex formation and the abnormal pressure system.The paper discusses and ana-lyzes the feasibility of the technical difficulties and technical schemes in sidetrack drilling;sums up the successful experi-ence in real drilling, which provides technical support for the recovery and regeneration for old wells in Tahe oilfield.