克拉玛依砾岩油藏微观孔隙结构及分类

MICROPORE STRUCTURE AND CLASSIFICATION OF CONGLOMERATE RESERVOIR FORMATION IN KARAMAY OILFIELD

罗明高 张庭辉

Luo Minggao Zhang Tinghui

本文总结了克拉玛依砾岩油藏的基本孔隙特征,在概括了孔隙结构的定性定量二维三维特征后,用多种统计学方法对大量实际资料进行分类研究,从而获得多种分类方案。通过逐级优选将砾岩油藏储层分为三类。此三类储层在数字特征和曲线形态特征上有明显的变化规律;有不同的沉积相、不同的层位及不同宏观类型分布特征;在典型相关图中有清晰的分类界限。满足了"理论性强、实用性佳、可分性好"的分类原则,建立了统一的分类标准。

The basic pore types,the origin,the characteristics of micropore structure both in 2-dimension and 3-dimension space,the modality of the pore texture in the conglomerate reservoir formation of Karamay Oilfield were studied in this paper.The main parameters describing the pore structures were determined by statistics.Then the data from different oil districts,facies zones and formations were studied and twelve classifying programmes were obtained with different statistical cluster methods(cap analysis,dynamic cluster and system cluster).The pore structures could be divided into three kinds through optimiza-tion,which were characterized by different facies z騨es,formations and macro-types.The variation regularitvies of Parameters and curves(both capillary pressure curve and -function curve)differ from each other.Obvious boundaries existed in correlation dia-grams.All of them satisfied the principle of the classification that are the most reason-able,applicable and classifiable,Finally,the standard of classification was set up.

10.11743/ogg19920209