应用逐步判别分析法预测二连探区储层动态特征

Predicting Formation Dynamic Property of Erlian Exploration Area by Using Step Discriminant Analysis Method

二连探区低孔低渗储层大多需要压裂酸化改造才能投产,分析测井静态资料,准确预测储层动态特征和类型,对措施选层、效果预测和测试工作制度优化设计等方面至关重要。依据储层动态测试资料,将二连探区储层划分为三种类型。将测试动态数据与测井静态资料进行关联分析,应用逐步判别分析法建立了利用静态资料预测储层类型方法,确定有效孔隙度、声波时差、总产率指数进入预测方程,提出了储层类型预测步骤,采用了自身验证法和交互验证法对判别方程进行检验。利用该方法预测的储层类型与实际测试数据解释结果相符,预测效果较好,为测试工作制度优化和增产措施决策提供了依据。

Most of low porosity and low permeability reservoirs of Erlian exploration area are needed of fracturing and acidizing to production,so it is crucial to select the candidate,predict the effect and optimize the test process by predicting the dynamic property and type of formation. The formation is divided into three types according to the dynamic testing information. A method to predict the formation type using step discriminant analysis method on the basis of association analysis of dynamic data and static data is proposed to determine effective porosity,interval transit time,and total production index to enter a prediction equation,the prediction procedure is suggested and this equation is checked using self-verification and cross validation. The formation type predicted by this method is corresponds to actual interpretation result by well testing and its predicting results are better,which can provide the basis for well testing optimization and simulation decision.