CAJ | 학술논문

页岩气作为一种新兴的油气资源已越来越受到重视，国外页岩气勘探开发经验表明，水平井是页岩气藏成功开发的关键之一，但国内勘探开发工作及关键技术研究还处于起步阶段，存在钻速低、周期长、成本高及钻井中易发生井漏等问题。结合彭水区块4口页岩气水平井的钻井实践，从地层压力、地层岩性、岩石可钻性、页岩坍塌机理及页岩气固井特殊要求等方面入手，详细分析了气体钻井、旋转导向钻井、井眼轨迹控制、防漏堵漏、钻井液优选、水泥浆体系优选、井身结构优化、钻头优选、井眼净化等关键技术及现场应用效果，并围绕页岩气钻井提速、降低成本提出了一些建议。
혈암기작위일충신흥적유기자원이월래월수도중시，국외혈암기감탐개발경험표명，수평정시혈암기장성공개발적관건지일，단국내감탐개발공작급관건기술연구환처우기보계단，존재찬속저、주기장、성본고급찬정중역발생정루등문제。결합팽수구괴4구혈암기수평정적찬정실천，종지층압력、지층암성、암석가찬성、혈암담탑궤리급혈암기고정특수요구등방면입수，상세분석료기체찬정、선전도향찬정、정안궤적공제、방루도루、찬정액우선、수니장체계우선、정신결구우화、찬두우선、정안정화등관건기술급현장응용효과，병위요혈암기찬정제속、강저성본제출료일사건의。
Shale gas ,a new kind of emerging resource ,has draw n more and more attention recently . The successful experiences of exploration and development for shale gas in some foreign countries show that the horizontal well is the key for successful shale gas development .However ,shale gas exploration and development and related key technique research in China are still at the primary stage .Engineering difficul-ties in shale gas well drilling face low penetration rate ,long drilling cycle ,high cost and possible circulation loss .Based on the drilling practice of 4 shale gas wells in Pengshui Block ,an in-depth research on formation pressure ,lithology ,drillability ,shale caving mechanism and special requirements for cementing was made and then key techniques including air drilling ,rotary steering drilling ,well trajectory control ,leakage pre-vention and sealing ,drilling fluid selection ,cement slurry optimization ,well structure optimization ,drilling bit selection ,wellbore cleaning ,as well as their effectiveness were analyzed .Finally some recommendations on how to increase penetration rate and to lower cost were put forward .This article might be instructive for the development of shale gas with similar geologic and reservoir conditions .