基于低渗透储层品质评价的产能预测方法

Method for Productivity Prediction Based on the Quality Evaluation of Low Permeability Reservoirs

X区块是南堡油田典型的深层低渗透储层,具有孔隙结构复杂、非均质性强的特点,从而造成储层品质以及产能定量预测评价难以确定。利用物性和压汞试验数据,提取出能表征储层孔隙结构进而有效反映储层渗透性的储层品质指数和压汞系数,再结合常规测井资料以及试油生产数据建立储层品质评价方法,总结出研究区的储层品质评价标准。在储层品质评价的基础上,结合开发需求,对低渗透储层提出建立综合评价指数与米产液指数关系的产能预测方法,预测结果与生产测试结果较为相符,取得了良好的效果。

X Block was a typical deep-layer and low-permeability reservoir in Nanpu Oilfield,it had the characteristics of complicated pore structure and strong heterogeneity,therefore it was difficult for the evaluation of reservoir quality and quantitative prediction and evaluation of productivity.The data of physical property and mercury-injection experiments were used to extract the reservoir quality index and coefficient of mercury injection for characterizing the reservoir pore structure and the reservoir permeability,and then combined with conventional logging data and oil testing data,the method of reservoir quality evaluation was established,the reservoir quality evaluation standard was summed up in the studied area.On the basis of reservoir quality evaluation,combined with the development requirements,aproductivity prediction method of comprehensive evaluation index combined with fluid producing index per meter is proposed for the low permeability reservoirs,the predicted results is more consistent with that of production test,good result is achieved in application.