The Drilling Depth of China's 1st 10,000-Meter R&S well Exceeds Half

Generally speaking, wells with a drilling depth of more than 6,000 meters are called ultra-deep wells. Drilling ultra-deep wells brings multiple drilling and completion technical limits such as ultra-high temperature and ultra-high pressure. For every 100 meters underground, the temperature will increase by about 2 degrees Celsius, and the underground will face a high temperature of about 220 degrees Celsius. At present, although the drilling depth of Shendi Take 1 well is more than half, the remaining part is planned to take more than a year due to the need to overcome difficult formations.

According to Liu Jinlong, an engineer of PetroChina's Tarim Oilfield Exploration Division, a high-strength metal-sealed core bit, a logging tool with a temperature resistance of 230 degrees Celsius and a pressure resistance of 175 MPa, has been developed to provide support for 10,000-meter-deep well drilling.

In the past two years, more than 90% of the newly added oil and gas reserves in the Tarim Oilfield were obtained through drilling ultra-deep wells. The annual oil and gas production of ultra-deep wells in Tarim Oilfield has exceeded 18 million tons, accounting for more than half of the total output of the oilfield. Ultra-deep wells have become an important support for increasing reserves and production.

"It took 10 years to drill a well in the Tarim Oilfield from a well depth of 4,500 meters to 6,000 meters, and it took 17 years to drill a well from a well depth of 7,000 meters to 9,000 meters. For many days, this will also be the world's fastest record for drilling a 10,000-meter-deep well." Liu Jinlong said.

Tags: Core bit

PetroChina announced on the 23rd that China's first research and study well(R&S well), Shendi Tak 1 well, has been drilled at half the depth. Well Shendi Tako 1 is located in the Tarim Basin, Xinjiang, with a designed well depth of 11,100 meters. Since the drilling began on May 30 this year, it has completed the drilling tasks in the middle and shallow layers, with a maximum daily drilling depth of 567 meters.

2023-08-25

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