致密砂岩毛管压力和电性参数及可动流体饱和度研究

发布时间：2018-01-15 20:24

本文关键词：致密砂岩毛管压力和电性参数及可动流体饱和度研究　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：致密砂岩储层岩石微观孔隙结构特征复杂,如何更好地理解储层岩石的毛管压力特征、电性特征和储层的可动流体饱和度,一直受到人们的关注。本文有针对性地设计并完成了 H和G区块储层岩石的铸体薄片鉴定、扫描电镜分析、半渗透隔板法毛管压力电性联测实验分析、核磁共振实验分析等,重点研究了储层岩石微观孔隙结构特征、岩石电性的影响因素、储层饱和度模型、可动流体饱和度与孔隙结构综合指数之间的关系。论文具体开展的工作如下:(1)完成研究区块12 块岩芯的铸体薄片和扫描电镜分析,研究了储层的微观孔隙结构特征;(2)根据半渗透隔板法毛管压力电性联测实验结果,建立毛管压力与含水饱和度的关系,并验证了实验的有效性,同时研究了毛管压力曲线特征;(3)基于阿尔奇公式,利用实验数据建立地层因素与孔隙度、电阻增大系数与饱和度之间的关系,同时结合铸体薄片和扫描电镜结果研究了岩石颗粒大小、孔隙结构、胶结物对胶结指数m的影响和孔隙半径、孔隙连通性对岩石电性的影响;(4)根据实验得出岩石电性数据,建立两个区块的传统饱和度模型和LBT饱和度模型,并以H区块为例对两种饱和度模型进行比较;(5)毛管压力与电阻增大系数满足乘幂关系,基于分形理论,建立了它们之间的关系模型,并分析了模型的幂指数值与渗透率之间的关系;(6)利用核磁共振T_2谱曲线,分析饱和谱的形态特征和驱替前后T_2谱形态变化特征,研究了截断法和面积法两种可动流体饱和度,并以称重法为基础进行准确性比较;同时研究了称重法、截断法和面积法可动流体饱和度与孔隙结构综合指数之间的关系。通过上述实验及分析,研究了 H和G区块的微观孔隙结构特征、毛管压力曲线特征、电性特征以及可动流体饱和度特征,为储层综合评价和开发奠定了基础。
[Abstract]:The characteristics of micro pore structure of tight sandstone reservoir rock complex, how to better understand the characteristics of capillary pressure of reservoir rocks, movable fluid saturation, electrical characteristics and reservoir, has attracted people's attention. This paper is designed and the H and G reservoir rock thin sections completed, scanning electron microscope analysis, analysis of partition method of capillary pressure electrical measurement experimental semi permeable, NMR analysis, focusing on the reservoir microscopic pore structure characteristics, factors affecting the electrical properties of rock, reservoir saturation model, the relationship between movable fluid saturation and pore structure index. The main work is as follows: (1) analysis of 12 core samples from the study area of casting thin sections and scanning electron microscope study of microscopic reservoir pore structure characteristics; (2) according to the semi permeable diaphragm method of capillary pressure electrical contact test results, Relationship between capillary pressure and water saturation, and verifies the validity of the experiment, and study the characteristics of capillary pressure curve; (3) based on the Archie equation, using experimental data to establish the relationship between formation factor and porosity, resistivity and saturation coefficient, combined with the research results of the rock grain size, thin section and scanning electron microscope cast pore structure, cementation effect on the cementation index m and pore radius, pore connectivity effects on electrical properties of rock; (4) based on the experimental results of rock electric data, traditional saturation model and LBT saturation model to build two block, and H block as example and comparison of two kinds of saturation model; (5) the capillary pressure and resistance coefficient satisfy the power relation, based on the fractal theory, establish the relationship model between them, and analyzes the relationship between the numerical model of power exponent and permeability; (6) The use of nuclear magnetic resonance T_2 spectrum curve, morphological analysis of saturated spectrum and displacement T_2 spectra before and after morphological changes, study the truncation method and area method of two kinds of movable fluid saturation, and the weighing method as the basis for comparing the accuracy of weighing method; also, truncation method and area method and the relationship between movable fluid saturation the pore structure index. Through the experiment and analysis, the research of micro pore structure of H and G block, the characteristics of capillary pressure curve, the electrical characteristic and movable fluid saturation characteristics, laid the foundation for reservoir evaluation and development.

【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE311

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