古地理学报2025，Vol.27Issue(3)：578-595,18.DOI:10.7605/gdlxb.2025.013
川南地区志留系石牛栏组古地貌格局及沉积演化特征
Palaeogeomorphic pattern and sedimentary evolution of the Silurian Shiniulan Formation in southern Sichuan Basin
摘要
Abstract
The southern Sichuan Basin represents the depocenter of the Silurian Longmaxi Forma-tion,a regionally significant hydrocarbon source rock.The overlying Shiniulan Formation limestone has significant advantages for near-source hydrocarbon accumulation.However,no significant breakthrough has yet been achieved in the exploration of large-scale reservoirs in this interval.The study focuses on the geological and sedimentary characteristics of the Shiniulan Formation.Using drilling,core,outcrop,and 3D seismic data,the palaeogeomorphic framework and sedimentary evolution were reconstructed.The re-sults show that the study area can be divided into three geomorphic units:the southern high zone,the cen-tral depression,and the northern high zone.These geomorphic features strongly control the spatial distribu-tion of sedimentary facies within the Shiniulan Formation.The high zones are characterized by carbonate platform and reef deposits,which are the main targets for oil and gas reservoir prediction.The central de-pression dominantly consists of mudstone and mixed shelf deposits.The uplifts of the Chuanzhong and Qianzhong during the Early Silurian period shaped the palaeogeomorphy and sedimentary pattern of the Shiniulan Formation.The continuous activity of the Chuanzhong uplift and the enhanced terrestrial input from the Xuefeng ancient land and the falling sea-level led to the demise of the carbonate platform.These findings offer a theoretical framework and predictive insights for future hydrocarbon exploration and deve-lopment in the Shiniulan Formation.关键词
沉积演化/古地貌/生物礁/油气勘探/石牛栏组/四川盆地Key words
sedimentary evolution/palaeogeomorphy/reef/petroleum exploration/Shiniulan Forma-tion/Sichuan Basin分类
天文与地球科学引用本文复制引用
张本健,余信,罗龙,刘建平,谭先锋,周刚,钟原,汪华,戴鑫,乔艳萍,张自力,兰才俊,陈龙..川南地区志留系石牛栏组古地貌格局及沉积演化特征[J].古地理学报,2025,27(3):578-595,18.基金项目
中国石油天然气股份有限公司重大科技专项(编号:2023ZZ16)、国家自然科学基金(编号:U2344209,42072140,42202170,42102133)、重庆市杰出青年科学基金(编号:CSTB2022NSCQ-JQX0031)和重庆市教委科技重大项目(编号:KJZD-M202101502)共同资助.Co-funded by Major Science and Technology Project of CNPC(No.2023ZZ16),National Natural Science Foundation of China(Nos.U2344209,42072140,42202170,42102133),Chongqing Outstanding Youth Science Foundation(No.CSTB2022NSCQ-JQX0031)and Major Science and Technology Project of Chongqing Education Commission(No.KJZD-M202101502) （编号:2023ZZ16）
