CAJ | 학술논문

渤海渤中明化镇地层由于伊利石、蒙脱石含量较高,水化膨胀极其严重,泥浆性能也很难控制,所以在这一地区目的层为明化镇、井深在4000 m左右的大位移水平井,直接采用φ311.2 mm井眼着陆后,下φ240.6 mm套管的难度很大.为了降低该类井型的作业难度,采用φ215.9 mm井眼着陆后,下φ177.8 mm尾管后,进行φ152.4 mm井眼水平井作业.其中BZ19-4-B10 h井就是一个典型的成工事例,该井的成功实施,为今后小井眼水平井作业在井身结构、钻具组合、钻头选型、水力参数、钻井液性能等方面提供了经验.
발해발중명화진지층유우이리석、몽탈석함량교고,수화팽창겁기엄중,니장성능야흔난공제,소이재저일지구목적층위명화진、정심재4000 m좌우적대위이수평정,직접채용φ311.2 mm정안착륙후,하φ240.6 mm투관적난도흔대.위료강저해류정형적작업난도,채용φ215.9 mm정안착륙후,하φ177.8 mm미관후,진행φ152.4 mm정안수평정작업.기중BZ19-4-B10 h정취시일개전형적성공사례,해정적성공실시,위금후소정안수평정작업재정신결구、찬구조합、찬두선형、수력삼수、찬정액성능등방면제공료경험.
Because of the high content of goeschwitzite and montmorillonite in Bozhong Minghuazhen reservoir of Bohai Sea, there happened serious hydrate expansion and mud property was hard to control. Therefore, it was difficult to run φ240.6 mm casing af-ter φ311.2 mm borehole landing. In order to decrease the operating difficulty, φ152.4 mm horizontal borehole operation was conducted after φ215.9 mm borehole landing and φ177.8 mm tail pipe running. The successful example of well BZ19-4-B10 h set good practice ground for later operation in well structure, make up of string, bit type selection, hydraulics, mud property and so on.