储层层次分析和模式预测描述法

Reservoir type analysis and model prediction description method

大庆油田应用现代沉积和露头研究中的层次分析思想和自创的模式预测描述法 ,研制出依据油田密井网测井资料和大型河流 三角洲特有的沉积规律与模式 ,由大到小、由粗到细分层次逐级解剖砂体几何形态和内部建筑结构 ,精细地建立储层地质模型 ,系统描述储层宏观非均质体系的研究方法。该方法将整套储层划分为岩相段、单砂层、沉积微相、单砂体、建筑结构单元、内部非均质等 6个描述层次 ,并对砂体井间连续性、几何形态与边界位置、厚度与渗透率的平面非均质性采用模式化预测性描述 ,较好地解决了储层复杂非均质体系描述和井间砂体预测的难题。

Using scale analysis thinking in current sedimentation and outcrop study,as well as self-developed model prediction description method,a study method based on logging data in dense well pattern and sedimentatary rule and model in a large scale flavial-delta is developed.Geometrical shape of sand bodies and internal construction structures is dissected from small to large,from course to fine and step by step.The reservoir geological medel is set up precisely,and macroscopic heterogeneity of the reservoir is systematically descripted.In the method the reservoir is devided into six description types,including lithofacies interval, single sand layer,sedimentary microfacies,single sand body, construction structural unit and internal heterogeneity.And the continuity between wells, geometric shape and location of boundary,thickness and horizontal heterogeneity of permeabitity of the sand body is described on modelling prediction,better solved a difficult problem of complex heterogeneous system description and interwell sand body prediction,providing a reliable technical support for oilfield development adjustment in late period of high water cut and enhanced recovery.