彩南油田彩9井区西山窑组油藏井间动态连通性研究

彩南油田彩9井区西山窑组属于低渗-特低渗油藏,非均质性强,注采井网适应性差,储量动用程度低,水驱开发效果极差。准确的判断注采井间动态连通性,是改善油田开发效果的关键。针对彩南油田彩9井区西山窑组油藏,建立井间动态连通性模型。利用油田注采动态数据反演得到井间动态连通系数,绘制全区注采井间连通图。对比分析示踪剂和微地震解释结果,验证方法的准确性,并且分析表明该油田西部连通性存在明显的方向性,呈西北-东南方向。

Research on interwell dynamic connectivity for Xishanyao reservoir wellblock Cai-9 Cainan oilfield

The Cainan oilfield Cai-9 wellblock Xishanyao reservoir is the hypotonic-ultra-low permeability reservoirs,which is strong heterogeneity,poor adaptability of the injection patterns,bad water flooding and much remaining oil was left. The key to improve the effects of oil field development is to determine the interwell dynamic connectivity accurately. The reservoir interwell dynamic connectivity inversion model was established for the Cainan oilfield,Cai-9 wellblock,Xishanyao reservoir.The corresponding result of interwell connectivity was mapped by the parameter of interwell dynamic connectivity,which solved by oilfield injection and dynamic data.According to the interpretation results of tracer and micro-earthquake,the new method for inversion of interwell connectivity is reliable and obvious directionality,northwestsoutheast,existed in the west of the oilfield.