特种油气藏2024，Vol.31Issue(4)：54-63,10.DOI:10.3969/j.issn.1006-6535.2024.04.007
川南—川东地区龙马溪组优质页岩分布及主控因素
The Distribution and Main Controlling Factors of High-quality Shale in Longmaxi Formation in Southern Sichuan-Eastern Sichuan Region
摘要
Abstract
Sichuan Basin is rich in marine shale gas resources.From Paleozoic to Cenozoic,the basin has experi-enced multiple tectonic movements,forming complex structural styles and variable sedimentary environments,featu-ring with uneven distribution of shale gas resources.In order to clarify the distribution law of high-quality shale,taking the Longmaxi Formation shale in southern Sichuan-eastern Sichuan Region as an example,comprehensive analyses including whole-rock X-ray diffraction,geochemical testing,basin simulation,and drilling and logging data analysis were conducted.The distribution law and main controlling factors of high-quality shale were discussed from the perspectives of sedimentation,reservoir formation,and structure,and favorable areas for shale gas explora-tion and development were delineated.The results show that high-quality shale in the southern Sichuan-eastern Si-chuan Region is mainly distributed in the semi-deepwater to deepwater continental shelf facies;an Ro value of 2.5％to 3.5％is conducive to the development of high-quality shale;and fold structures play a significant control-ling role in the enrichment and distribution of shale gas.The research results can provide theoretical basis for shale exploration and development in southern Sichuan-eastern Sichuan Region.关键词
页岩/主控因素/沉积环境/储层分布/龙马溪组/川南—川东地区Key words
shale/main controlling factors/sedimentary environment/reservoir distribution/Longmaxi Formation/southern Sichuan-eastern Sichuan Region分类
石油、天然气工程引用本文复制引用
陈渝川,林伟,李明涛,韩登林,郭伟..川南—川东地区龙马溪组优质页岩分布及主控因素[J].特种油气藏,2024,31(4):54-63,10.基金项目
国家自然科学基金青年项目"海陆过渡相页岩复杂类型孔隙差异性结构刻画及赋气机理研究"(42202141) （42202141）
