Abstract: To promote the development of ultra-deep oil and gas resources, some key engineering technologies were developed in the Shunbei Oil and Gas Field, summarized in this paper. A series of key drilling technologies were applied in this field, including geology-engineering integration, casing program design method, wellbore collapse prevention technology in fractured zones, well trajectory and geological sweet spot optimization method, reservoir protection technology, and directional drilling technology in ultra-deep and ultra-high temperature formation, etc. Additionally, a series of key completion technologies were also developed, including high-precision stress field inversion algorithm, high-performance acid fracturing fluid, tool-temporary plugging composite multi-stage fracturing technology, and high-efficency wellbore support technology, etc. Furthermore, several key oil recovery technologies were also established, including safe and economic decision-making technology for oil and gas production strings, allocation optimization approach of economic benefits, integrated development program design of oil and gas reservoirs, water shut-off and foaming profile control technology in deep reservoirs, etc. Together, these technologies constitute an engineering technology system for ultra-deep reservoir development. Future research topics are also proposed in this paper, which will focus on the drilling technology that can enhance reserve utilization ratio, the efficient and intelligent completion technology for deep wells, and the enhanced oil recovery technology in deep reservoirs. This will facilitate efficient development of lower abundance reserves, discover new types of oil and gas reservoirs, and create a new sustainable development situation for deep oil and gas exploitation.