摘要
In 2023,the China National Petroleum Corporation(CNPC)has successfully drilled a 10000-m ultra-deep well-TK-1 in the Tarim Basin,NW China.This pioneering project has achieved dual breakthroughs in ten-thousand-meter ultra-deep earth science research and hydrocarbon exploration while driving technological advancements in ultra-deep well drilling engineering.The successful completion of TK-1 has yielded transformative geological discoveries.For the first time in exploration history,comprehensive data including cores,well logs,fluids,temperature and pressure were obtained from 10000-meter depths.These findings conclusively demonstrate the existence of effective source rocks,carbonate reservoirs,and producible conventional hydrocarbons at such extreme depths-fundamentally challenging established petroleum geology paradigms.The results not only confirm the enormous hydrocarbon potential of ultra-deep formations in the Tarim Basin but also identify the most promising exploration targets.From an engineering perspective,the project has established four groundbreaking technological systems:safe drilling in complex pressure systems of ultra-deep wells,optimized and fast drilling in complex and difficult-to-drill formations of ultra-deep wells,wellbore quality control under harsh conditions in ultra-deep wells,and data acquisition in ultra-deep,ultra-high-temperature complex formations.Additionally,ten key tools for ultra-deep well drilling and completion engineering were developed,enabling the successful completion of Asia’s first and the world’s second-deepest vertical well.This achievement has significantly advanced the understanding of geological conditions at depths exceeding 10000 m and positioned China as one of the few countries with core technologies for ultra-deep well drilling.
