砂砾岩体期次内幕非均质表征方法研究

Study on the heterogeneous characterization method of the internal sedimentary cycle in sand-gravel body reservoir

基于单井单期次渗透率曲线,提出了一种砂砾岩体油藏沉积期次内幕非均质表征的新方法,称为渗透率曲线方法.此方法在砂砾岩油藏单井单期次渗透率曲线图上定义基线、突起、突起面积等基本概念,建立非均质表征参数A,B,并根据A、B参数的匹配关系,建立了非均质性依次变强的4种表征砂砾岩体期次内幕非均质类型的理论模型,再结合其他油藏静动态指标,譬如储量丰度、平均单井产能等,建立了砂砾岩体沉积期次内幕综合评价体系.实例研究结果表明,与传统参数表征方法相比,渗透率曲线法在表征砂砾岩沉积期次内幕非均质性,评价储层产油(注水)能力、渗滤能力等特征方面具有显著的优势.

On the basis of the permeability curve of a single sedimentary cycle of the single well ,a new heterogeneous characterization method of the internal sedimentary cycle in sand‐gravel body reservoir was presented ,which was named permeability curve method .First ,the fundamental concepts were defined in the permeability curve of a single sedimentary cycle of the single well in sand‐gravel body reservoir ,which included base line ,protrusion and protrusion area .Second ,the heterogeneous characterization parameters A and B were founded . Thirdly , four theoretical models were built with the order of increasing heterogeneity .Fourthly ,using the four theoretical models and other static ,dynamic parameters such as＆nbsp;reserves abundance and initial production of a single w ell , the comprehensive evaluation system w hich could characterize the heterogeneity of the internal sedimentary cycle in sand‐gravel body reservoir was established .The case research results prove that ,compared with the traditional parameter characterization method ,the permeability curve method has significant advantages in heterogeneous characterization and effectiveness evaluation of reservoir .