CAJ | 학술논문

以气液两相流理论为基础,分析了充气钻井的井筒压力分布问题.针对井筒压力分布对井眼尺寸的敏感性,给出了注气量计算方法.对井底压力和注气压力随井眼尺寸变化的情况进行了分析,给出了注气量与井筒压力分布的关系,并对其变化情况进行了解释.在满足携岩的前提下,大井眼所需的注气量与小井眼之间存在差别,同时指出了采用复合式井眼进行充气钻井的优势.所得结论对指导和实施欠平衡钻井作业和研究具有一定的理论参考价值.
이기액량상류이론위기출,분석료충기찬정적정통압력분포문제.침대정통압력분포대정안척촌적민감성,급출료주기량계산방법.대정저압력화주기압력수정안척촌변화적정황진행료분석,급출료주기량여정통압력분포적관계,병대기변화정황진행료해석.재만족휴암적전제하,대정안소수적주기량여소정안지간존재차별,동시지출료채용복합식정안진행충기찬정적우세.소득결론대지도화실시흠평형찬정작업화연구구유일정적이론삼고개치.
Based on the theory of gas-liquid two-phase flow, the wellbore pressure distribution problems were analyzed in the aerated drilling. In allusion to the sensitivity of wellbore pressure distribution on wellbore size,a method was pro vided for gas injection rate calculation The relationship was discussed and explained between the bottomhole pressure and injection gas pressure and the variable size of borehole. The rate of gas injection is different between large borehole and slim hole to meet the premise of rock carrying, at the same time, the advantages of using composite wells for aerated drilling are pointed out. The result provides a theoretical reference for studying the unbalanced well drillings.