The Developed Formation Is Harder Than Copper And Has A Temperature As High As 204°C. My Country’s Offshore Deep Drilling Technology Has Achieved A Breakthrough
Nov 14, 2023
Today (November 14), my country's Bohai Sea's first 100-billion-square-meter gas field, the Bozhong 19-6 gas field phase I development project, is about to go into operation, marking a new stage in the development of deep and complex buried hill oil and gas reservoirs offshore in my country. National energy security and energy structure optimization are of great significance.
The Bozhong 19-6 gas field phase I development project is completely independently designed, constructed, installed and operated by my country. It can realize multiple functions such as ultra-high pressure cyclic gas injection, comprehensive oil and gas processing, green shore power, and central control remote control. The technological breakthrough will fill the technological gap in domestic offshore oil and gas field development.
my country's offshore deep drilling technology achieves leapfrog
The oil and gas in the Bozhong 19-6 gas field is buried in a buried hill reservoir with a depth of more than 5,000 meters, and the reservoir fractures are densely intertwined like a spider web. Oil and gas reservoirs are widely distributed but complex in type. The formation faced by oil and gas development is harder than copper metal, and the maximum temperature of the formation reaches 204°C, which places extremely high requirements on drilling technology.
The Bozhong 19-6 gas field phase I development project has built three new wellhead unmanned platforms and arranged 65 development wells with an average well depth of 5,598 meters and the deepest well reaching 6,494 meters. Among them, there are 17 ultra-deep wells above 6,000 meters. The total drilling footage exceeds 350,000 meters, equivalent to drilling through nearly 40 Mount Everests.
Cui Guojie, Project Manager of the Engineering Technology Operation Center of CNOOC Tianjin Branch: During the project development process, through the innovative application of new drilling and completion technologies, valuable experience has been accumulated for subsequent offshore oil fields to improve drilling operations in deep high-temperature well sections and narrow pressure window formations.
The reporter learned that in order to speed up the development progress, CNOOC has jointly developed with China National Petroleum Corporation and Sinopec. So far, the overall production efficiency of the project has increased by 20%.
