大庆石油地质与开发2026，Vol.45Issue(2)：11-21,11.DOI:10.19597/J.ISSN.1000-3754.202410048
四川盆地侏罗系凉高山组沉积特征及演化规律
Sedimentary characteristics and evolution laws of Jurassic Lianggaoshan Formation in Sichuan Basin
摘要
Abstract
Well Ping'an-1 of Jurassic Lianggaoshan Formation in northeastern Sichuan Basin has made significant breakthroughs,revealing that Jurassic Lianggaoshan Formation has abundant shale oil and gas resources.However,less research on the overall exploration of Lianggaoshan Formation across the whole basin has constrained the prog-ress of shale oil and gas exploration in Lianggaoshan Formation.Based on field outcrop,core,thin sections,elec-tric logging and mud logging data,the overall sedimentary characteristics and areal extention of sedimentary facies in Lianggaoshan Formation are clarified by means of rock types classification,single-well sedimentary microfacies classification,well-tie facies correlation and establishment of sedimentary model.The results show that the structure in sedimentary period of Jurassic Lianggaoshan Formation is relatively unstable,forming an incomplete long-term water inflow and regression cycle,which includes lowstand system tract,lacustrine transgressive system tract and incomplete highstand system tract.Sediments in Lianggaoshan Formation are mainly lacustrine silt-fine sandstone and mud shale,with small amount of shell limestone locally developed and generally being a lake-delta sedimentary system.Vertically,1st sub-member of upper Lianggaoshan Formation and 2nd sub-member of upper Lianggaoshan Formation are favorable exploration intervals,and horizontally,Pingchang-Yingshan area is favorable exploration ar-ea.The research provides support for further exploration and development of shale oil in Lianggaoshan Formation.关键词
四川盆地/凉高山组/沉积特征/沉积演化/沉积相展布/页岩油气Key words
Sichuan Basin/Lianggaoshan Formation/sedimentary characteristics/sedimentary evolution/sedi-mentary facies extention/shale oil and gas分类
能源科技引用本文复制引用
张大智,刘若彤,杨刚,付尤中,李鑫,肖利梅,邵红君,隋立伟,李纪鹏,孙山..四川盆地侏罗系凉高山组沉积特征及演化规律[J].大庆石油地质与开发,2026,45(2):11-21,11.基金项目
中国石油天然气股份有限公司科技重大专项"四川盆地风险勘探领域和目标研究、工程技术攻关及现场试验"(2023YQX10104). （2023YQX10104）
