关键词: 自适应控水装置, 控水稳油, 低黏度, 仿真模拟, 物理试验

Abstract: The offshore oil fields are mostly developed by long horizontal wells, with prominent " toe-end effect" and obvious water coning near the edge and bottom, which restrict the efficient development of oil fields. The conventional autonomous inflow control device is limited to the problem of low viscosity crude oil and high water cut in the reproduction wells of the western South China Sea oil field, so a new autonomous inflow control device suitable for low viscosity oil is proposed. The new autonomous inflow control device design is based on the friction theory of hydrodynamics and the theory of fluid vortex. Its structure is consisted of a selector and a hydrocyclone, which magnifies the difference between oil and water properties. The software is used to simulate the new autonomous inflow control device, and the oil-water pressure difference ratio is taken as the performance index, and the test equipment is set up to verify it. According to the simulation and test results, the pressure drop of water passing through the new autonomous inflow control device is much higher than that of oil, and the over-valve pressure drop increases with the increase of water cut, which proves that the new autonomous inflow control device has a good effect of controlling water and stabilizing oil for low viscosity oil.