China National Petroleum Corporation (CNPC) announced that the Deep Earth Tak 1 Well, the country's first scientific exploration well exceeding 10,000 meters, has been successfully drilled to a depth of 10,910 meters, making it the second deepest vertical well in the world and the deepest in Asia. Located in the Tarim Basin of Xinjiang, the well was drilled in May 2023 and has set multiple records, including the fastest drilling speed to reach 10,000 meters on land and the deepest core sample retrieval in Asia. This achievement marks a significant breakthrough in deep earth scientific research and ultra-deep oil and gas exploration.
During the drilling process, the project team overcame ultra-heavy loads, wellbore instability, tool failure, and formation leakage. They independently developed the world's first 12,000-meter automated land drilling rig, high-efficiency diamond drill bits, and a water-based drilling fluid resistant to 220°C. These innovations have established a self-reliant key technology system for 10,000-meter drilling. The well penetrated 12 different lithological and pressure layers, encountering rocks over 500 million years old. For the first time globally, oil and gas indications were discovered at such depths on land, enriching the understanding of ultra-deep oil and gas geology. Researchers have also created Asia's first 10,000-meter geological profile based on core samples, cuttings, and logging data.
The core samples retrieved from over 10,000 meters underground in the Tarim Basin are as precious as lunar soil, setting a record for the deepest core sample retrieval on land in Asia. These samples provide a unique "color palette" from the Earth's depths, offering insights into ancient geological formations.
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