石油钻探技术
石油鑽探技術
석유찬탐기술
PETROLEUM DRILLING TECHNIQUES
2013年
5期
62-66
,共5页
膨胀套管%侧钻%水平井%祼眼%封堵%完井%塔河油田
膨脹套管%側鑽%水平井%祼眼%封堵%完井%塔河油田
팽창투관%측찬%수평정%관안%봉도%완정%탑하유전
expandable casing%sidetracking%horizontal well%open hole%seal%well completion%Tahe Oilfield
塔河油田奥陶系储层侧钻水平井受老井井身结构、地层及地质避水要求等的限制，需要提高造斜点至上部石炭系泥岩段地层，而该地层与奥陶系储层为2套不同的压力系统，因此如何有效封堵石炭系易塌地层，是高效开发该地区奥陶系剩余油的关键。采用膨胀套管充当技术套管封堵钻井复杂地层，通过优化井身结构及后续的钻井工艺，为解决塔河油田深层侧钻水平井钻井、完井难点提供了一套全新的方案。针对塔河油田φ177.8 mm套管深层开窗侧钻井的钻井、完井难点，通过深入分析研究膨胀套管管材和膨胀螺纹等关键问题，完善了深井膨胀套管的施工工艺和实施程序，探索出一套塔河油田深层侧钻水平井膨胀套管钻井完井技术。该技术在塔河油田现场试验3口井，开窗层位均位于石炭系地层，开窗点深于5100 m ，侧钻后在斜井段成功封堵裸眼复杂地层，实现了国产膨胀套管首次在裸眼定向井段的封堵应用，为钻井、完井中封堵复杂地层提供了新的技术手段。
塔河油田奧陶繫儲層側鑽水平井受老井井身結構、地層及地質避水要求等的限製，需要提高造斜點至上部石炭繫泥巖段地層，而該地層與奧陶繫儲層為2套不同的壓力繫統，因此如何有效封堵石炭繫易塌地層，是高效開髮該地區奧陶繫剩餘油的關鍵。採用膨脹套管充噹技術套管封堵鑽井複雜地層，通過優化井身結構及後續的鑽井工藝，為解決塔河油田深層側鑽水平井鑽井、完井難點提供瞭一套全新的方案。針對塔河油田φ177.8 mm套管深層開窗側鑽井的鑽井、完井難點，通過深入分析研究膨脹套管管材和膨脹螺紋等關鍵問題，完善瞭深井膨脹套管的施工工藝和實施程序，探索齣一套塔河油田深層側鑽水平井膨脹套管鑽井完井技術。該技術在塔河油田現場試驗3口井，開窗層位均位于石炭繫地層，開窗點深于5100 m ，側鑽後在斜井段成功封堵裸眼複雜地層，實現瞭國產膨脹套管首次在裸眼定嚮井段的封堵應用，為鑽井、完井中封堵複雜地層提供瞭新的技術手段。
탑하유전오도계저층측찬수평정수로정정신결구、지층급지질피수요구등적한제，수요제고조사점지상부석탄계니암단지층，이해지층여오도계저층위2투불동적압력계통，인차여하유효봉도석탄계역탑지층，시고효개발해지구오도계잉여유적관건。채용팽창투관충당기술투관봉도찬정복잡지층，통과우화정신결구급후속적찬정공예，위해결탑하유전심층측찬수평정찬정、완정난점제공료일투전신적방안。침대탑하유전φ177.8 mm투관심층개창측찬정적찬정、완정난점，통과심입분석연구팽창투관관재화팽창라문등관건문제，완선료심정팽창투관적시공공예화실시정서，탐색출일투탑하유전심층측찬수평정팽창투관찬정완정기술。해기술재탑하유전현장시험3구정，개창층위균위우석탄계지층，개창점심우5100 m ，측찬후재사정단성공봉도라안복잡지층，실현료국산팽창투관수차재라안정향정단적봉도응용，위찬정、완정중봉도복잡지층제공료신적기술수단。
Restricted by the existent casing program ,formation and the requirement to avoid acquifer , when sidetracking horizontal wells into Ordovician reservoir in Tahe Oilfield ,the kickoff point must be moved up to upper Carboniferous mudstone formation .The two formations belong to different pressure systems ,so how to effectively seal the Carboniferous unstable formation is the key for developing the Ordo-vician remaining oil efficiently .Using expandable casing as intermediate casing to seal complex formations during drilling ,provides a new way to solve the problems encountered in sidetracking horizontal wells in Tahe Oilfield by optimizing the casing program and follow-up drilling process .According to the difficulties encountered in deep sidetracking from φ177.8 mm casing in Tahe Oilfield ,through dissecting the key tech-nologies of expandable casing ,such as expandable pipes and expansion thread ,the operation process and procedure of running expandable casing in deep wells were improved ,finding out a set of drilling technolo-gy with expandable casing .The technology has been tested in 3 wells in Tahe Oilfield ,in which the window were all at the Carboniferous layer below 5 100 m ,the inclined segments after sidetracking sealed the com-plex formation successfully ,realizing the first sealing with domestic expandable casing in open hole ,provi-ding a new technical means to seal complex formations during drilling .
