CAJ | 학술논문

控压钻井包括管理压力钻井、欠平衡钻井和空气钻井.控压钻井可以减少非钻进时间和事故、提高机械钻速、预防漏失、消除压差卡钻、保护低压产层以提高产能.地热井具有温度高、地层硬度高、裂隙发育、地层压力低伴随浅部地层压力变化大等特点.在地热勘探开发中应用控压钻井技术有利于提高钻进速度、预防漏失、提高产能.介绍了控压钻井及其关键技术,同时阐述控压钻井在地热勘探开发中的应用.
공압찬정포괄관리압력찬정、흠평형찬정화공기찬정.공압찬정가이감소비찬진시간화사고、제고궤계찬속、예방루실、소제압차잡찬、보호저압산층이제고산능.지열정구유온도고、지층경도고、렬극발육、지층압력저반수천부지층압력변화대등특점.재지열감탐개발중응용공압찬정기술유리우제고찬진속도、예방루실、제고산능.개소료공압찬정급기관건기술,동시천술공압찬정재지열감탐개발중적응용.
Controlled pressure drilling (CPD) includes managed pressure drilling (MPD), underbalanced drilling (UBD) and air drilling (AD).CPD can be used to decrease non drilling time and drilling hazards, increase rate of penetration (ROP), prevent lost of circulation, eliminate sticking, protect reservoir with low pressure and improve productivity.Geo-thermal wells are of characteristics of high temperature, hard rock, fractured formation and low pore pressure along with likely high pressure of shallow formation.It is proved that CPD can increase ROP, prevent lost of circulation and improve productivity.This paper introduces CPD technology and its application in geothermal energy exploration and development.