With the water flooding of Q oilfield in Bohai Sea entering the middle and high water cut development stage,the problems such as the dominant flow channel between injection-production wells and the continuous decline of oil well production become more and more prominent.The combination of"nano-microspheres + supramolecular microspheres"particle system with different sizes was carried out to control flooding.The experimental results showed that the combination of nano-microspheres and supramolecular microspheres could effectively plug the high permeability layer,start the middle and low permeability layer,and improve the water flooding recovery.The field application results of Q oilfield show that the injection is good,and the oil increase effect of precipitation is obvious.The maximum daily oil increase of the well group is 45.3 m3,the maximum daily precipitation is 2.4%,and the accumulative oil increase is 18000 m3,which provides reference and guidance for the development of displacement control technology of similar oilfield in Bohai Sea.
关键词
超分子微球/纳米微球/组合调驱/封堵性研究
Key words
supramolecular microspheres/nanometer microsphere/combined modulation drive/plugging ability research
维普
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