低渗透油藏可动流体饱和度计算及影响因素研究综述  

A review on calculation of movable fluid saturation of low permeability oil reservoir and its influencing factors

作　　者：张娜[1,2] 张紫筠 王帅栋 ZHANG Na;ZHANG Ziyun;WANG Shuaidong(State Key Laboratory for Geomechanics and Deep Underground Engineering,Beijing 100083,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,China)

机构地区：[1]深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《水利水电技术（中英文）》2021年第9期143-155,共13页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金青年科学基金项目(41502264);中央高校基本科研业务费专项基金(2020YJSSB07);中国矿业大学(北京)大学生创新训练(C202006968)。

摘　　要：近年来,随着经济社会快速发展,我国对石油资源的需求也逐渐增加。我国目前勘探开发的大部分油田都是低渗透油藏,其孔隙细小,孔隙之间的连通性差,束缚流体含量很大。由于可动流体饱和度能反映整个孔隙空间内可动流体量及孔隙表面和流体之间的作用,因此是一个很重要的物性参数。详细分析可动流体饱和度的计算方法和影响因素对于预测储层的开发效果具有重要的理论和实际意义。在核磁共振技术基础上,国内外有关学者结合各种试验技术和方法研究了可动流体饱和度的计算方法及影响因素,取得了丰硕成果。基于核磁共振技术,可动流体饱和度的计算方法有截断法和面积法,但两种方法的计算结果存在明显的区别。分析两种方法的计算原理可知,两种方法各有其适用条件。核磁共振技术与其他试验技术相结合,如扫描电镜(SEM)、CT扫描技术、X射线衍射(XRD),可进一步探究可动流体饱和度的影响因素。选取储层物性、微观孔隙结构特征、黏土矿物三方面主控因素进行详细分析。In recent years,with the rapid development of economy and society,China′s demand for petroleum resources is gradually increasing.The most of the oil fields explored and developed in China are low permeability reservoirs with fine pores,poor pore-connectivity and large bound fluid content.As the movable fluid saturation can reflect the amount of movable fluid and the interaction between the pore surface and the fluid,it is an important physical property parameter.The detailed analyses on the calculation method and the influencing factors of the movable fluid saturation have important theoretical and practical significances for predicting the development effect of the relevant oil reservoir.On the basis of nuclear magnetic resonance technique(NMR),the calculation method and the influencing factors of the movable fluid saturation are studied by the relevant scholars at home and abroad,and then fruitful results are achieved.Based on NMR,two methods are there for the calculation of the movable fluid saturation,i.e.the cut-off method and area method,but obvious differences are there between the calculation results of them.It is known from analyzing the calculation principles of them that each method has its own applicable condition.Combining NMR with the other experimental techniques,such as scanning electron microscopy(SEM),CT scanning,and X-ray diffraction(XRD),the influencing factors of movable fluid saturation can be further explored.Three dominated factors,i.e.reservoir physical properties,microscopic pore structure characteristics and clay minerals are selected herein for the detailed analyses concerned.

关 键 词：低渗透油藏 可动流体饱和度 核磁共振技术 储层物性 微观孔隙结构特征 黏土矿物 渗流 影响因素 

分 类 号：TE122[石油与天然气工程—油气勘探]