CAJ | 학술논문

为了进一步提高深部地层钻井速度，利用机械比能理论对复合钻井参数进行优化。从岩石力学和能量守恒角度出发，分析了基于机械比能理论的钻井优化机理，得出了钻进参数与机械钻速之间的相互关系。在T eale机械比能模型的基础上，引入钻头滑动摩擦系数和钻头破岩效率系数，将扭矩表示为钻压的函数，解决了常规钻井中扭矩难以直接测量的问题，建立了基于比能理论的复合钻井参数优化模型，并开发了钻井优化系统。该系统在实钻过程中可以进行钻井参数的动态监测，实时反馈钻井参数优劣，提示井下复杂情况。现场试验应用后，优化井段平均机械钻速提高20％～30％，钻头使用寿命延长。研究结果表明，机械比能理论能够用于钻进参数优化，达到深层提速和降低钻井成本的目的。
위료진일보제고심부지층찬정속도，이용궤계비능이론대복합찬정삼수진행우화。종암석역학화능량수항각도출발，분석료기우궤계비능이론적찬정우화궤리，득출료찬진삼수여궤계찬속지간적상호관계。재T eale궤계비능모형적기출상，인입찬두활동마찰계수화찬두파암효솔계수，장뉴구표시위찬압적함수，해결료상규찬정중뉴구난이직접측량적문제，건립료기우비능이론적복합찬정삼수우화모형，병개발료찬정우화계통。해계통재실찬과정중가이진행찬정삼수적동태감측，실시반궤찬정삼수우렬，제시정하복잡정황。현장시험응용후，우화정단평균궤계찬속제고20％～30％，찬두사용수명연장。연구결과표명，궤계비능이론능구용우찬진삼수우화，체도심층제속화강저찬정성본적목적。
With the drilling targets going increasingly deeper ,a new drilling parameters optimization method based on mechanical specific energy (MSE)theory was investigated to continually improve the rate of penetration in deep formations .From the perspectives of rock mechanics and conservation of energy ,the relationship between drilling parameters and ROP has been derived from comprehensive analysis of opti-mized drilling mechanism based on MSE .Based on the R .Teale MSE model ,by introducing the sliding fric-tion coefficient and rock-broken efficiency of the bit ,the torque was expressed as the function of drilling weight to solve the difficulty of measuring torque directly in conventional drilling ,the optimized models were built on the basis of specific energy theory for different drilling modes ,and a real-time drilling optimi-zation system was developed .The system can monitor all dynamic drilling parameters during drilling opera-tion ,and feed back the performance of drilling parameters and dow nhole situation in real time .A pilot test shows the average ROP increased by 20% to 30% compared with offset wells ,and prolonged the service life of bit .T he research results indicate that specific energy optimized drilling technique can optimize drill-ing parameters in real time ,w hich can be used to drilling design ,parameter optimization and analysis ,so as to raise the ROP in deep formations and reduce drilling cost .