摘要
在复杂地质条件下钻复杂结构井及特殊工艺井时 ,在地质和工程方面存在许多不确定性因素和复杂性问题。随钻导向、实时优化、井下动态诊断及其集成技术是解决这些难题的有效途径 ,基于智能钻柱 ,提出了把上述三项技术集成为一个整体的集成化的SOD系统 ;应用智能钻柱及其相关配套技术能提高双向闭环信息传输速率达 10 4～ 10 6bps ,同时能从地面向井下输送 10～ 2 5kW的电力。给出了智能化钻井“导向—优化—诊断”集成系统总体结构设计方案。该系统能使地质条件透明化 ,使钻井过程简化并能提高钻井效率 ,有利于精确控制井身轨迹 ,可随钻分析钻柱 (尤其是底部钻具组合、钻井工具 )的力学行为 ,能优化钻井过程 ,实时识别和处理井下异常工况 ,能降低钻井成本约 2 0 %。
There are many uncertainties 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 uncertain 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.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2004年第4期80-83,共4页
Acta Petrolei Sinica
基金
国家自然科学基金资助项目 (NO .50 2 340 30 )部分研究成果
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
complex structural well
steering drilling
intelligent drilling
measurement while drilling
dynamic diagnosis
optimizing drilling
