特种油气藏2018，Vol.25Issue(2)：37-41,5.DOI:10.3969/j.issn.1006-6535.2018.02.007
焦石坝地区构造特征及页岩气保存模式研究
Structure Characterization and Shale Gas Preservation Pattern in Jiaoshiba
摘要
Abstract
The sandstone core samples in the Jiaoshiba periphery and the NW-SE geologic cross-sections are taken to further characterize the structure and identify shale gas preservation pattern. Microstructure analysis and balanced cross-section are used to study the stress direction,major deformation process and deformation period of Jiaoshiba in the geologic history. Research indicates that the shale gas preservation pattern in Jiaoshiba is featured by weak tectonic reworking,late reworking time,better fault sealing,moderate buried depth and favorable top-bottom li-thology combination.It is mainly affected by the compressive stress along the NW-SE direction in the geologic histo-ry period,followed by the NE-SW stress.The major deformation period is after 120 Ma,the total formation shorten-ing is 3.8 km with a shortening ratio of 16.7%,where 65 ~ 85 Ma(Late Yanshan Period)is considered as the predominant uplifting stage of Jiaoshiba.This research could provide a significant guidance for the shale gas explora-tion and development in the periphery of Sichuan Basin.关键词
页岩气/显微构造/构造形变/保存模式/焦石坝Key words
shale gas/microstructure/structure deformation/preservation pattern/Jiaoshiba分类
能源科技引用本文复制引用
刘鹏,吴佩津,彭钰洁..焦石坝地区构造特征及页岩气保存模式研究[J].特种油气藏,2018,25(2):37-41,5.基金项目
国家自然基金"海相页岩纹层多样性及其对页岩储层品质的影响"(41602147) （41602147）
江苏省普通高校学术学位研究生创新计划项目"渝东龙马溪组构造保存条件及储层含气量变化研究"(KYLX160550) （KYLX160550）
