摘要
实验室岩心分析是研究页岩油气藏中流体性质与赋存空间的重要实验方法,松辽盆地古龙陆相页岩油储层的特点是黏土含量高、孔隙结构复杂、纹层页理发育、各向异性强,由于页岩岩心遇水膨胀而且易碎,常规砂岩实验方法不适用于页岩岩心分析;同时,国内外缺少陆相页岩油储层饱和度模型方面的研究,因此,急需研发页岩油储层实验室岩石物理分析方法,并建立页岩油储层饱和度模型。选取松辽盆地青山口组的10块岩心样品,从页岩储层的岩石物理性质分析入手,结合松辽盆地古龙陆相页岩储集特征,采用自吸-加压饱和的方法,开展二维核磁共振-岩电联测实验;通过二维核磁共振谱图中各分区信号量的变化,分析自吸与加压饱和阶段中主要饱和水的孔隙空间,研究页岩导电机理,确定页岩电性特征,建立并验证适合于研究区页岩储层实验室条件的饱和度模型。通过验证,构建的饱和度模型能够描述松辽盆地古龙页岩的导电机理,进行研究区饱和度的计算。
Laboratory core analysis is an important means to study shale oil&gas reservoirs and their fluid properties.The characteristics of Gulong continental shale oil reservoir in Songliao basin is high clay content,complex pore structure,abundant laminar foliation and strong anisotropy.Because the shale core expands with water and is brittle when encountering water,the conventional sandstone test method is not suitable for shale core analysis,and there is a lack of research on the saturation model of continental shale oil reservoir at home and abroad,so it is urgent to develop the petrophysical analysis method of shale oil reservoir laboratory and establish the saturation model of shale oil reservoir.In this paper,10 core samples of Qingshankou formation in Songliao basin are selected.Starting from the analysis of the petrophysical properties of the shale reservoir,combined with the reservoir characteristics of continental shale in Songliao basin,the two-dimensional nuclear magnetic resonance rock electric joint measurement experiment is carried out by using the method of self-absorption and pressure saturation.The pore space of the main saturated water in the stage of self-absorption and pressure saturation is analyzed through the change of the signal quantity in each section of the two-dimensional nuclear magnetic resonance spectrum,the saturation model of laboratory conditions suitable for shale reservoir in the study area is established and verified.Through verification,the established saturation model can describe the conductivity mechanism of paleo shale in Songliao basin and calculate the saturation of the study area.
作者
赵小青
金永年
于翔
彭贵远
闫学洪
ZHAO Xiaoqing;JIN Yongnian;YU Xiang;PENG Guiyuan;YAN Xuehong(Accumulation and Development of Continental Oil and Gas Key Laboratory of Education Ministry(Northeast Petroleum University),Daqing,Heilongjiang 163318,China;School of Earch Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Daqing Branch,China National Logging Corporation,Daqing,Heilongjiang 163412,China)
出处
《测井技术》
CAS
2023年第1期29-35,共7页
Well Logging Technology
基金
中国石油集团测井有限公司大庆分公司“泥页岩含油性评价模块”(2019WG94010)。
