基于系统分析方法的油藏井间动态连通性研究

注采系统具有一阶线性时滞系统的特征，应用系统分析方法，建立了油藏井间动态连通性反演模型,模型参数意义明确，可以考虑注入信号的衰减和时滞特性，同时基于拟牛顿算法给出反演模型特征参数的求解方法。应用所建模型,对冀东油田高13断块进行了井间动态连通性反演。根据井间动态连通图，可将各井组划分为各向连通型、单向连通型、线状连通型。对区块内各油井目前的动液面进行统计表明，应用本文方法进行井间连通性反演符合油藏的实际情形，可为该区后期开发方案的实施提供依据。

Research on reservoir interwell dynamic connectivity using systematic analysis method

The injection-production system has the features of the first-order linear time-delay systems. The systematic analysis method was used to establish the reservoir interwell dynamic connectivity inversion model. The parameters of the model have the specific meaning and can be used to effectively identify the interwell connectivity and time lag. The corresponding method for solving the characteristic parameters was proposed on the basis of the Quasi-Newton algorithm. The interwell connectivity of Gao-13 Block in Jidong Oilfield was inversed. The corresponding result of interwell connectivity was mapped. According to the different inversion result, the well pattern could be divided into three types, including isotropic connection, one direction connection and linear connection. The statistic result of current fluid levels of producing wells in the block indicated that the new method for inversion of interwell connectivity had a good agreement with the practical situation and could effectively provide good basis for the next decision-making of reservoir development plan.