China's independent research and development of oilfield multiple dual-effect water control technology was successfully used for the first time

Recently, a well in the Liuhua 11-1 oilfield, which implements multiple double-effect water control operations, was successfully put into production, which marks the first successful application of multiple dual-effect water control technology independently developed by China in the oilfield, realizing segmented fine water control in the wellbore and avoiding the risk of
rapid rise in water cut after the oil well is put into operation.

Liuhua 11-1 oilfield reef limestone belongs to rock fracture reservoir, and there are common technical problems
such as easy water channeling to violent flooding and difficult segmentation in the wellbore.
To this end, after three consecutive years of research, the project team of CNOOC Energy Development Co.
, Ltd.
Engineering Technology Company innovatively launched the "intelligent water control valve + lipophilic hydrophobic particles + liquid expansion packer" multiple water control mode for the first time in China, which realizes the dual effect of intelligently controlling the oil-water propulsion speed in the formation cracks and effectively controlling the flow direction of liquid in the wellbore, so as to achieve the purpose
of accurate and efficient water control.

The application of this technology in Liuhua 11-1 oilfield is the first time in China, which solves the problem of fractured reservoir flooding of reef limestone in one fell swoop, and provides strong technical support
for long-term stable production and improved final recovery of China's offshore oilfield.