New Development of High Temperature Deep Well Drilling Technology in Huabei Oilfield

The Drilling efficiency is one of the main factors affecting costs. In a typical oil and gas well, close to 50% of the cost is mechanically drilled. The deep wells in Huabei Oilfield are mainly composed of buried hill wells. As an important exploration and development field in Huabei Oilfield, buried hill oil and gas reservoirs have continuously improved in exploration and development, and the annual production of buried hill oil and gas reservoirs only accounts for 14.1% of the oilfield's annual production. Therefore, there is an urgent need to find a replacement production capacity.  The oil and gas exploration and development of the Mildfield in Huabei Oilfield is faced with the dilemma of decreasing investment, increasing cost, insufficient replacement reserves, and making it difficult to stabilize oil production. With the deepening of the exploration of deep buried hills in the central and northern parts of Huabei Oilfield, the strong supporting role of wellbore technology is prominent. The wellbore problem in mountain exploration has become an urgent problem to be solved. This article focuses on the geological conditions encountered during drilling of high-temperature deep buried mountain wells in the Wuqing Depression of northern Huabei Oilfield. Combining the actual drilling data of adjacent wells and indoor experiments, the research and application of technologies such as wellbore structure optimization design, bit design optimization, and high-temperature and high-density drilling fluid system are carried out. Through the introduction of new speed increasing technologies, processes, and tools, a comprehensive set of speed increasing technologies suitable for drilling and completion of deep buried mountain wells in northern of Huabei Oilfield is gradually formed.