CAJ | 학술논문

华北油田注水井具有井眼深、温度高、斜度大等特点，曾经采用不同类型封隔器进行分注，但大部分分注井管柱有效期短，部分井管柱还出现起出困难甚至大修的情况，无法满足油藏分注的要求。通过对常规分注管柱井下受力的分析研究，论证其短寿命原因，提出了分注管柱底部支撑锚定的方式，从根本上解决了深井分注管柱上下蠕动的问题。此外，现有的封隔器用于多级分注时解封负荷过大且易上大修，研制出的新型逐级解封封隔器可以解决常规封隔器下井后的安全起出问题，具有一定的推广价值。
화북유전주수정구유정안심、온도고、사도대등특점，증경채용불동류형봉격기진행분주，단대부분분주정관주유효기단，부분정관주환출현기출곤난심지대수적정황，무법만족유장분주적요구。통과대상규분주관주정하수력적분석연구，론증기단수명원인，제출료분주관주저부지탱묘정적방식，종근본상해결료심정분주관주상하연동적문제。차외，현유적봉격기용우다급분주시해봉부하과대차역상대수，연제출적신형축급해봉봉격기가이해결상규봉격기하정후적안전기출문제，구유일정적추엄개치。
The water injection wells in Huabei Oilifeld are characterized by great wellbore depth, high temperature, large deviation, etc. Historically, various types of packers were used for layered injection, but the pipestring in most injection wells had a short effective period. Some pipestrings were hard to be tripped out and even repaired. So such pipestrings could not satisfy layered injection into reservoirs. Analysis of downhole stress on conventional layered injection pipestring demonstrated the causes for their short service life and put forward the anchoring mode of bottom support of layered injection pipestrings, which solved the problem of up and down creepage of injection pipestring in deep wells. In addition, the present packers, when used for layered injection, have a large unsetting load and need to be serviced. The new type of stepwise unsetting packers developed lately can solve the problem of safe tripping out of downhole conventional packers and is of some promotion signiifcance.