基于动静态资料综合判断聚驱后的油藏井间连通性——以渤海L油田为例

Inter well connectivity of reservoir after polymer flooding based on dynamic and static data coupling judgment method--by taking Bohai L oilfield as an example

渤海L油田油藏聚驱后,部分井区后续水驱阶段出现含水回返快,剩余油挖潜难的问题。为此,应用水平井测井解释静态法分析储层平面非均质性变化,再利用注采受效关系、产聚浓度监测数据及不稳定试井等动态资料判断井间连通性。研究表明,测井模型显示井区内储层平面非均质性较强,注采受效法判断注水井C1H与采油井C2H趾部连通性好,与采油井C3连通性差,验证了测井解释结果;产聚浓度监测结果表明,注水井C4与采油井C2H井间连通性差,与采油井C3、C6井间连通性好,并由不稳定试井法得到验证。该方法在渤海L油田C井区应用效果较好。

After polymer flooding in Bohai L oilfield,the water cut returns quickly and the remaining oil is difficult to tap.Therefore,horizontal well logging interpretation static method is used to analyze the change of reservoir plane heterogeneity,and then the dynamic data such as injection production effect relationship,polymer concentration monitoring data and unstable well test are used to judge the inter well connectivity.The study shows that the heterogeneity of the reservoir plane from the logging model is strong in the well area,the connectivity between the injection C1H well and toes of the production C2H well is good judged by injection production acceptance method,and the connectivity between injection C1H well and oil production C3 well is poor,which verifies the logging interpretation results.The monitoring results of polymer production concentration show that the connectivity between injection C4 well and oil production C2H well is poor,and the connectivity between water injection C4 well and oil production C3 and C6 wells is good,which is verified by the unstable well test method.This method has a good application effect in C well area of Bohai L oilfield.