Successfully verified! my country leads the world in this technology
2024-08-28
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On August 26, CNOOC announced thatThe blowout operation of the A12 well (LS25-1-A12 well) of the second phase project of the "Deep Sea No. 1" natural gas development well with the highest offshore pressure in my country was a complete success, and the test production exceeded expectations.This also marks the completion of all offshore drilling and completion operations of the second phase of my country's first deepwater high-pressure natural gas development project "Deep Sea No. 1", verifying the advancement and reliability of the new deepwater high-pressure drilling and completion technology system.This shows that my country has entered the world's leading ranks in deepwater high-pressure drilling and completion technology。
"Drilling and completion operations are to safely and efficiently establish oil and gas transportation channels in deep-sea formations, which is also the biggest difficulty in the development of deep-water high-pressure gas fields." Chen Haodong, general manager of the Engineering Technology Operation Center of CNOOC Hainan Branch, introduced that the second phase of "Deep Sea No. 1" is divided into three well areas: south, north and east, with 12 underwater gas wells densely deployed, more than the first phase project, andThe average well depth exceeds 5,000 meters, and the formation pressure reaches 69 MPa, which is 1,000 times the working pressure of a household pressure cooker., the highest formation temperature reaches 140℃,The total drilling depth of the project exceeds 60,000 meters, which is close to the height of 7 Mount Everests.The overall difficulty of the engineering operation is second to none among domestic deepwater projects.
It is understood thatThe development well operation of the second phase of "Deep Sea No. 1" simultaneously challenges the four major industry challenges of "deep water, deep layer, high temperature and high pressure", and there is no precedent to learn from globally.During the project design phase, CNOOC assembled the country's top technical forces to form a joint research team, conducted systematic research on the complex situation of deepwater high-pressure wells, and explored the establishment of a core technology system for deepwater high-pressure well drilling and completion, including four key technologies: deepwater high-pressure well safety control technology, centralized wellhead large-scale operation technology, deepwater deep-layer drilling efficiency improvement technology, and deepwater long-term production guarantee technology.
