关键词: 磁导向, 非常规, 井眼轨迹控制, 双水平井, 定向井

Abstract: In the non-conventional oil and gas area like heavy oil and oil sand, high-precision positioning and real-time navigation are required for drilling wells in relation to target well location and borehole trajectory in order to meet the special drilling requirements on such complicated wells. Therefore, to solve these technological bottlenecks, the efforts are focused on the distribution law of rotary magnetic field under the interfered environment and the study of the inter-well relative positioning and navigation methods, establishment of downhole artificial magnetic source for optimization of the design and calibration theoretical system of testing, and development of a set of methods for positioning algorithm and filtration of weak magnetic field signals. In addition, a series of products was independently and successfully developed, such as dual horizontal well magnetic piloting tool and relief well magnetic piloting tool. Experiment and industrialization of this series breaks the long-term monopoly of foreign technology. Based on the innovative mindset and work principle of those products, some follow-up products are also developed and used in a number of different fields, establishing presence in the domestic magnetic piloting sector on a long-term basis.