In the southern margin of the Junggar Basin, Xinjiang, Well Hu 6 was completed at a depth of 7,280 meters. The construction lasted 197 days, setting the record for the shortest drilling cycle and fastest ROP in the southern margin; Tianan 1 well was completed. The drilling depth was 8,140 meters, breaking multiple records including the deepest well in the Junggar Basin, becoming the first deep well over 8,000 meters in the Xinjiang Oilfield; Well Letan 1 overcomes many problems such as the most complex structural model and the highest pressure coefficient in the southern margin area, realizing the drilling stage Successfully concluded.
Since the beginning of this year, CNPC has firmly established the concept of "Achieving Party A can achieve itself", focusing on technology, refined equipment, improving efficiency, and strengthening management, comprehensively improving the quality of regional key exploratory well construction operations, and fully guaranteeing the deep exploration and development of the group company. The successful drilling of a number of high-difficulty key exploration wells in the southern margin of Xinjiang indicates that PetroChina’s technical services have made great breakthroughs in the field of ultra-deep wells under extremely complex geological structural conditions, and accumulated valuable management and technical experience for exploration and development in the southern margin. Promote the level of deep-seated exploration and development operations to a new level.
Committed to technological innovation. In response to a series of difficulties and risks such as high and steep formations in the southern margin, development of fractured zones, complex formation pressure systems, ultra-deep wells with high temperature and high pressure, narrow safety density windows, and high well control risks, CNPC Technical Services adheres to the problem-oriented approach and innovates the use of high-efficiency shock absorbers. , Vertical drilling system, high-temperature resistant and high-density oil-based drilling fluid, reaming while drilling, fine pressure control and other process technologies, forming a supporting and applicable technical plan for the southern edge.
Strengthen technical support. China Petroleum Technical Services actively participates in the review of construction plans for risk exploration wells and key exploration wells of the group company, organizes special technical seminars, continues to optimize construction plans, and selects technical experts to provide technical support; conducts technical exchanges and sharing among member companies, promotes the application of bit selection and fine control To ensure the safe and efficient construction of key exploratory wells, strengthen the construction of technical support system, EISC implements full risk analysis and monitoring, and provides all-weather technical support.
Strengthen process control. CNPC Technical Services has organized technical experts to carry out on-site inspections and on-site guidance for key exploratory wells on the "Four Nos and Two Directs", insisted on leading command, selected outstanding leading cadres and technical experts to be responsible for the well, and established a professional joint project team to control the entire process. , Fine control. At the same time, strengthen the upgrade of equipment and facilities, strengthen construction parameters, select high-quality drilling rigs and teams to invest in key exploration well construction, and strictly follow the working principles of "steady progress, advanced planning, seamless connection, leadership on duty, precise operation, and proper execution", and coordinate from the market. , Production organization, process optimization, technology upgrade and other aspects to provide all-round support for the construction site.
Pay attention to quality management. CNPC Technical Services specializes in the deployment of key exploratory well service guarantee work, formulates engineering technical assessment rules, and incorporates them into the annual assessment. Organize engineering and technical service companies to hold accident complex analysis meetings every quarter, focusing on analyzing key exploratory wells, formulating next steps, and continuing to strengthen the service guarantee for key exploratory wells.
