关键词: 复杂结构井, 导向钻井, 智能钻井, 随钻测量, 动态诊断, 优化钻井

Abstract: There are many un-certainties and complex problems in the fields of geology and engineering for drilling complex well under complex geological condition. The steering drilling,real-time optimizing drilling and dynamic diagnosis techniques while drilling as well as the integration of above techniques are right ways for solving above problems.Based on the intelligent drill-string,an integrated steering-optimizing-diagnosis (SOD) system was proposed.The intelligent drill-string is an electric drill-string and can transport the parameters including more than 30 variables measured down-hole while drilling to surface control decision orders,or transport the orders to bottom hole at high rate about 10⁴ bits to 10⁶ bits per second.It also can simultaneously transmit electrical power from 10 to 250 kW as required to down-hole soft and hardware.The structural diagram of SOD system was given,and the functions of this system were described.This system can make the geological un-certain parameters clear and simplify the drilling process.The SOD system also can be used to analyze the mechanical behaviors of drill strings (especial BHA and drilling-tool) and preciously control hole's trajectory while drilling.The drilling process can be optimized,and the drilling effectiveness can be improved in application of the system.This system can be used to real-timely recognize and treat down-hole abnormalities.The drilling cost will be reduced by 20 percent in application of this system.

Key words: complex structural well, steering drilling, intelligent drilling, measurement while drilling, dynamic diagnosis, optimizing drilling