Application of Detailed Reservoir Study in Comprehensive Adjustment of Matured Oilfield with Extra-High Water Cut

The northern block of Mian-14in Bamianhe Oilfield belongs to matured oilfield with extra-high water cut.It is encountered with such troubles as poor waterflooding effect,scattered and complex distribution of residual oil and difficulty in enhancing oil recovery by taking regular measures and adjustment method.Starting from the research of sedimentary microfacies and on the basis of detailed reservoir study,this paper obtains a clear picture of major geological factors and regularities of residual oil distribution in this block and then adopts the development technology which is applicable to improving water flooding in Mian-14.Proper adjustment has significantly increased rate of oil production,level of water flooding and recovery efficiency and improved development effect markedly.