Tarim Oilfield Broke The Domestic Record For The Fastest Drilling At A Well Depth Of 8,500 Meters, Completing Drilling Within 100 Days For The First Time, Increasing The Speed By 29.6%

Well Manshen 807, located in the Fuman Oilfield in the hinterland of the Taklimakan Desert, successfully completed 8,500-meter drilling in the Tarim Oilfield in only 99.85 days, breaking the domestic record for the fastest drilling within 8,500 meters of the vertical well section, marking PetroChina's scientific drilling in my country's largest ultra-deep oil field. Phased breakthroughs have been made in improving speed, quality and efficiency.

Well Manshen 807 is located in Shaya County, Aksu Prefecture, Xinjiang. It is an evaluation well deployed by Tarim Oilfield in Fuman Oilfield, my country's largest ultra-deep 1 billion ton oil area. The designed well depth is 8870 meters (vertical depth 8662.12 meters). It will be opened in 2023 Drilling started on November 30, 2018. The time it took for Well Manshen 807 to drill to 8,500 meters was shortened to less than 100 days. Compared with the design, it was 47.15 days ahead of schedule. The drilling speed was increased by 29.6%. It achieved the fastest oil search in the "Underground Everest" and demonstrated the hard power of quickly "cash out" the oil and gas enriched in ultra-deep layers. .

"During the second drilling of this well, we explored innovative technical measures and adopted a new high-torque screw + twist punch + PDC drill bit assembly. It took a total of 13.98 days to complete the drilling plug and all the second drilling footage, which was 11 times faster than the average cycle of the block. %." Zou Bo, deputy director of the Tazhong Project Management Department and safety supervision (drilling) of the Tarim Oilfield Oil and Gas Field Capacity Construction Division, said that the well was drilled to a depth of 8,000 meters in only 59.92 days, successfully shortening the domestic 8,000-meter vertical well drilling cycle to 60 Within days, it effectively guarantees the efficient and rapid development of ultra-deep oil and gas resources.

The geological conditions of the full-depth block are complex, and there are mainly engineering difficulties such as the salt layer is easy to creep, and the long open hole section is easy to span, leak, and tilt. At the same time, it faces high temperature and high sulfur content such as well temperature exceeding 185 degrees Celsius. The construction difficulty is rare in China. . In recent years, the Tarim Oilfield has promoted the "deep earth project", comprehensively "marched into the deep earth", challenged the limits of deep earth with technological breakthroughs, and reduced the average cycle of 8,000-meter wells in the full-depth block to about 147 days in 2023, becoming the "underground Everest's oil and gas reached the ground directly and established a high-speed channel.

How to improve the oil and gas contribution rate of new ultra-deep wells has become the main goal of Tarim's key research. The Oil and Gas Field Capacity Construction Division of Tarim Oilfield carries out targeted scientific and technological research, starting from the service "in-ground" project, continuing to promote the integration of geological engineering, the integration of Party A and Party B, and the integration of production and operation, and constantly strengthening technical measures, production organization, and safety A series of revolutionary speed-up measures such as management, comprehensively grasping the "three improvements" of personnel quality, technical level and management ability, boosting various drilling records to continuously refresh and run on a "new track", and providing my country with speed-up technology for ultra-deep well drilling It provides advanced ideas and experience for reference.

Since the beginning of this year, the drilling speed of Fuman Oilfield reached a new peak and hit 11 indicators. Three benchmark wells, Manshen 805, Manshen 807, and Manshen 809, were drilled more than 40 days ahead of the design cycle, and the drilling speed increased by more than 25%. In particular, the drilling completion cycle of Well Manshen 807 exceeded 100 days, which enriched the template for speeding up the drilling of ultra-deep wells in Tarim and provided strong engineering and technical support for efficient production construction in the 1 billion-ton large oil area.

Fuman Oilfield is the largest ultra-deep marine fault-controlled fracture-cavity carbonate reservoir discovered in my country so far, with oil and gas resources exceeding 1 billion tons. The oil reservoirs are generally buried in ultra-deep layers of 7,500 to 10,000 meters, and are rare in the world. Features such as ultra-deep, ultra-high temperature, ultra-high pressure. In 2023, the annual oil and gas output of Fumaman Oilfield will exceed 4 million tons, becoming the oil field with the fastest production increase in my country's deep underground field. It has created a new growth pole for my country's crude oil reserves and production, and has also erected in the "Sea of ​​Death" "Top Ten Super Projects of Central Enterprises".

According to the plan, by the end of the "14th Five-Year Plan", Fuman Oilfield will be built into a large ultra-deep oilfield with an annual oil and gas output of 5 million tons, continuously enhancing the confidence and strength to secure the energy job.