The Research and Field Test of Life-Long Water Control Completion Technology in the Offshore Oilfield

In order to solve the problem of bottom water rapid coning in horizontal well development of sandstone bottom water reservoir in Offshore oilfield. Based on the analysis of the advantages and disadvantages of ICD and AICD water control completion technology. Life-long water control completion technology is studied. The life-long water control completion technology combines the advantages of ICD and AICD water control completion technology. In the initial stage, the high permeability section is suppressed to balance the liquid supply profile in the horizontal section of horizontal well. At later stages, it can automatically control liquid to constrain the high water section, which can slow down the water cut increase. Well W1 in H reservoir of X oilfield is the application of life-long water control completion technology well By comparing with production well in the same reservoir. The analysis shows that the life-long water control completion technology can restrain the rise of water cut in the process of horizontal well development, which is worthy of expanding the scale test. At the same time, it can provide reference for the development of similar offshore reservoirs.