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Study on Water Ridge Variation of Horizontal Wells in Bottom Water Reservoir

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Document pages: 12 pages

Abstract: X oilfield is a typical strong bottom water reservoir in Bohai Sea. It isdeveloped by single sand body horizontal well. The edge and bottom water of thereservoir is active and natural energy development mode is adopted. At present,the comprehensive water cut of the oilfield is more than 96 , and has enteredthe stage of high water cut oil recovery. At present, fluid extraction from oldwells and new adjustment wells are the main ways to increase oil production.With the deepening of development, the distribution of underground remainingoil is becoming more and more complex. In order to further improve theimplementation effect of adjustment wells, the study of residual oildistribution law is increasingly important, and the study of water ridgemorphology of horizontal wells in bottom water reservoir has an importantguiding role in the study of remaining oil distribution. The main contents ofthis paper are as follows: the influence of horizontal well spacing, verticaland horizontal permeability ratio, single well liquid production, verticalposition of horizontal well, oil-water viscosity ratio, water cut and interlayeron water ridge morphology. These understandings can effectively guide thedeployment and optimization of adjustment wells. It provides technical supportfor the prediction of watered out thickness and optimization of adjustment welllayout scheme in X oilfield, and guides the further development and productionof the oilfield.

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