Abstract: The heavy oil reservoir in a certain block of Nanpu Oilfield has a large lateral development change and belongs to bottom water reservoir. In addition,affected by the early development,the oil-water system is also more complex. In order to ensure the reservoir development effect and realize the near-top water-avoidance drilling and maximize the reservoir development benefit,the reservoir knowledge is updated in real time during the operation implementation process. By making full use of the advantages of rotary steerable system and boundary detection tools,the effective control of the well trajectory is achieved,and real-time logging data are obtained,which lays a solid foundation for achieving the long-term,efficient and stable development of heavy oil reservoirs and obtains good economic benefits.

Key words: boundary detection tools, heavy oil reservoir, bottom water reservoir, horizontal well