利用总有机碳含量（TOC）、孔隙度等实验分析和水平井钻井试气等相关资料,开展了南川区块海相页岩储层源—储耦合关系与典型高低产井原因分析。研究表明,页岩有机质与储集空间紧密相连,互相依存,二者之间形成复杂的源—储耦合关系,TOC（源）和孔隙度（储）是表征源—储配置类型的关键参数,可划分为富碳高孔、中碳中孔、低碳低孔等12种类型,对页岩源—储相配置系进行半定量评价;同时,通过引入源—储分类新方法,建立了研究区五峰组—龙马溪组Ⅰ、Ⅱ、Ⅲ类页岩储层源—储配置评价标准,结合研究区开采工艺相似的8口水平井源—储配置评价与试气产量分析表明,Ⅰ类源—储配置层段在水平井段中占比越大,压裂试气产量越高。源—储分类新方法是页岩气井地质评价与压后产能分析的实用工具,具有推广意义。

By using the experimental test data such as the total organic carbon content（TOC） and porosity and the drilling and testing data of horizontal wells, the researches on the source-reservoir coupling relationship of marine shale reservoirs in Nanchuan district and the reasons for typical high and low field wells have been carried out. The researches show that the shale organic matter and storage space are closely connected and interdependent, forming a complex source-reservoir coupling relationship between each other. The TOC（the source） and the porosity（the reservoir） are the key parameters to characterize the source-reservoir configuration types. There are 12 categories, including high-carbon with high-porosity, medium-carbon with medium-porosity, and low-carbon with low-porosity, for the semi-quantitative evaluation. By introducing this new method of source-reservoir classification, the evaluation criteria of source-reservoir configuration for Ⅰ, Ⅱ and Ⅲ shale reservoirs of Wufeng-Longmaxi Formation in the study area are established. Combining the source-reservoir configuration evaluation and gas test production analysis of 8 horizontal wells with similar mining technology in the study area, it is shown that the larger the proportion of class Ⅰ source reservoir configuration in horizontal wells, the higher the fracturing gas test production. The new source-reservoir classification method is a practical tool for geological evaluation and post-compression productivity analysis of shale gas wells, and has the popularization significance.