Daily Crude Oil Output From China's Northernmost Offshore Oil Field Reaches 1,080 Cubic Meters

China News Service, Tianjin, December 6 (Wang Zaiyu and Wang Junyan) A reporter learned from the Tianjin Branch of CNOOC on the 6th that the Jinzhou 9-3 Oilfield, the northernmost oil field in China's offshore oilfield, has stabilized oil and controlled water, deeply tapped potential, and made fine adjustments. With the complete set of production-increasing measures, daily crude oil production has successfully reached 1,080 cubic meters.

The daily crude oil production of Jinzhou 9-3 Oilfield, the northernmost oil field in China's offshore waters, has successfully reached 1,080 cubic meters. Photo courtesy of CNOOC Tianjin Branch
It is understood that Jinzhou 9-3 Oilfield is located in the northern part of Liaodong Bay of the Bohai Sea. It is the northernmost offshore oilfield in China with the shallowest water depth and the highest latitude. The oilfield has 6 production platforms, including the world's first "pile foundation" The caisson-type multi-functional ice-resistant platform is a comprehensive offshore production unit integrating oil and gas extraction, processing and export.
Since it was put into production in 1999, the oilfield has entered the middle and late stages of development and production. A series of problems such as difficulty in adjustment, weak formation energy, high water content, and low single well productivity have gradually become apparent. Especially due to its northern location, severe sea ice will bring huge challenges to offshore production safety every winter.
In response to the rapid rise in water content and rapid decline in production in the western area of the oilfield, the oilfield innovatively adopted a new model of "diluted well network + flow field control". By changing the water injection layer, a set of water injection well networks are formed for the main and non-main oil groups on the basis of the original row of injection and production wells, and the flow field is changed. At the same time, the injection-production ratio is adjusted in a timely manner according to changes in oil well water content and liquid production, and the injection water field is precisely controlled to ensure that low water-cut oil layers are more effective.
While doing a good job of stabilizing oil and controlling water, reservoir personnel, based on the understanding that the remaining oil is relatively enriched near the fault, increased liquid extraction efforts in this area and deeply explored the potential of the remaining oil. Among them, after the replacement of the large pump in Well W10-4H, the maximum daily oil increase reached 102 cubic meters; after the replacement of the large pump in Well C20, the maximum daily oil increase also reached 30 cubic meters, finding a new growth point for the oil field output.