页岩气储层含气性影响因素及储层评价——以上扬子古生界页岩气储层为例

Gas-bearing influential factors and evaluation of shale gas reservoir: A case study of Paleozoic shale gas reservoir in Upper Yangtze region

郭少斌 黄磊

Guo Shaobin Huang Lei

中国地质大学(北京) 能源学院,北京 100083 中国地质大学(北京) 地球科学与资源学院,北京 100083

School of Energy Resources, China University of Geosciences, Beijing 100083, China School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China

页岩气藏属于自生自储型气藏，在进行储层评价时，应该重点考虑含气性。以我国上扬子古生界7口页岩气井岩心样品测试数据为基础，首先从总含气量入手，讨论储层含气性影响因素，包括有机碳含量、镜质体反射率、孔隙度、等温吸附气量、伊/蒙混层含量和可动流体百分数，研究发现可以用总含气量0.5 m3/t作为区分储层与非储层的界限，各项指标均和总含气量呈不同程度的相关关系。进而运用灰色关联理论，进行储层评价，同时参考前人成果和经验数据，提出了储层评价方案和储层空间图像特征。

Shale gas reservoirs are self-generated and self-contained, and gas-bearing property should be focused on during reservoir evaluation. Based on test data of core samples from 7 wells of Paleozoic in the Upper Yangtze Platform, beginning with gas content, the influential factors for gas-bearing property were discussed, including TOC, Ro, porosity, isothermal adsorption data, illite/ smectite formation content and movable fluid percentage. It was discovered that taking 0.5 m3/t as the boundary between reservoir and non-reservoir was practicable, and each parameter appears its relationship to total gas content. Based on grey relational theory, reservoir evaluation was performed. Referring to previous results and empirical data, reservoir evaluation scheme and space image characteristics were accomplished.

国土资源部“全国油气资源战略选区调查与评价”专项（2009QYXQ15-07-05）资助。

https://doi.org/10.11781/sysydz201306601