Research and Application of Low Frequency and High Amplitude Depressurization Technology in Yi 59 Block

Yi 59 block as the main block of Changchun, With the deepening of water injection development, Unstable water quality, measure, Influence of factors such as operation, increase in cumulative amount, Water injection pressure increased year by year, High pressure under injection problem increasingly significant, 19-year injection-production ratio drops to 1, Seriously restricting block development, Urgent governance. This article from the reservoir physical properties—source control—Start with daily management, the mechanism of reservoir blockage is analyzed, Preliminary demonstration of low frequency high amplitude depressurization injection enhancement technology, indoor evaluation, Field Application and Parameter Optimization, Effective management of under-injection wells, Achieved block smooth water injection, Great application prospect.