白云岩具有多种结构类型，不同结构白云岩的孔隙类型和物性存在差异。白云岩结构不仅对白云岩成因具有重要的指示意义，同时也控制着孔隙的发育。因此，将孔隙演化纳入到岩石结构演化中综合分析，确定白云岩结构与孔隙演化过程，可以更加深入的理解不同结构白云岩的成因与孔隙发育机理。本项目以川东北飞仙关组为例，以白云岩结构演化为主线，以成岩流体性质和演化为媒介，分析流体-岩石相互作用下岩石结构与孔隙的协同演化机制，揭示白云岩结构与孔隙差异性的主控因素，阐明优质储层的发育机理。首先，基于薄片、阴极发光、扫描电镜和荧光等技术，识别白云岩的现今结构和原始结构，结合层序和沉积旋回划分，分析岩石结构分布规律；其次，利用团簇同位素新技术、常规同位素和元素分析等，确定白云石化流体和其它成岩流体的性质和来源，分析水-岩相互作用下岩石结构和孔隙协同演化机制，建立白云岩结构和孔隙演化模式。

Dolostones have several different fabric types, and the pore types and porosity in these different fabric dolostones are also variable. The fabric is not only of great significance to the dolostone origin, but also controls the development of pores. Therefore, it is much better for comprehensive analyses of pore evolution with fabric to determine the process of the evolution of the fabrics and pores in order to further understand the origin of dolostone and the formation mechanism of pores. Taking the Feixianguan Formation in the northeastern Sichuan Basin as an example, based on the analyses of the evolution of dolostone fabric, as well as the nature and sources of other diagenetic fluids, this project focuses on the co-evolution of rock fabric and pore controlled by fluid-rock interaction, to reveal the key factors controlling the fabrics and pores in dolostones with different fabrics, and to determine the formation mechanism of high-quality reservoirs. Firstly, based on thin section, cathodoluminescence, scanning electron microscopy and fluorescence technologies, the present and original fabrics of dolostones are identified, and then the distribution of rock fabrics is analyzed by combining sequence and sedimentary. Secondly, the nature and sources of dolomitizing fluids, as well as other diagenetic fluids, are determined by using carbonate clumped isotopes, conventional isotope and element analyses. Based on the analysis of the co-evolution of fabric and pore in dolostones, the model will be established.