Countermeasure For Improving Water Injection Effect Of Block 146 In Xinmu Oilfield

According to analysis, we find out and grasp variation characteristics and variation law of reservoir parameter in oilfield development. Then, we in time adjust the parts which are inconsistent with development law and affect the final development effect. After these measures, we can achieve the goal of relatively high ultimate recovery and scientifically & reasonably developing oilfield. The main methods to improve water injection development effect of high water-cut development oilfield are remaining oil study, well pattern adjustment, ineffective water recycle management and separate-layer water allocation optimization,etc.According to development characteristics of block 146 in xinmu oilfield, we study block separate-layer water allocation and ineffective water recycle management through evaluation of water injection development effect, zonal injection allocation and enhancing dynamic analysis of injection-production. We set up zonal injection allocation flow through the study of zonal injection allocation, which makes zonal injection allocation more standardized and reasonable. We put forward reasonable water injection rate and injection-production ratio. Daily water allocation is 2195m3/ day. Injection-production ratio is 1.09. Water allocation of main production layer is 945 m3/ day,which occupy 43.0% of total water allocation. Daily water allocation of single well is 81 m3. Combining with the development contradiction of block 146, we put forward well group flooding control scenario, water detection and blocking of high water-cut well scenario, potential well fracturing scenario and well area tertiary oil recovery scenario of high position remaining oil distribution area. Through plugging high water zone, it can improve zonal contradiction longitudinally, decrease ineffective water recycle and change flow direction horizontally.Through development stage with high water cut and high yielding, it improve countermeasure for water injection development effect, slow down block decline and enhance oil recovery. Meanwhile, we set up comparatively scientific and perfect block development effect evaluation system, which will enrich medium-high permeable field development theories and form development matching technologies which suit to reservoir characteristics.