The Study of Well Type Optimization for Comprehensive Adjustment in Multi-layer Sandstone Oilfield

Comprehensive adjustment is one of effective way to improve the effect of oilfield development in multi-layer sandstone oilfield.Based on M oilfield,the development effect of directional and horizontal well was initially evaluated by analyzing production index,the single well controlled reserves and single well’s water drive recovery of adjustment wells.Then based on actual and theoretical reservoir numerical simulation model,it is concluded that the oilfield similar to M reservoir the single control reserves would greatly influence the production effect of horizontal wells and directional wells.When the ratio of directional and horizontal well controlled reserves is between 2.65 and 3.10,the cumulative production of directional is almost equal to horizontal well.And the development effect of horizontal wells and directional wells was impact by the condition of different flooding degree.The horizontal well would be get good result in thick and low water flooding degree sand.