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Ahead of Print Abstract
AAPG Bulletin, Preliminary version published online
Copyright © 2025. The American Association of Petroleum Geologists. All rights reserved.
DOI:10.1306/09022524110
World's geologically oldest 
shale
gas play: Cambrian shale gas accumulation in the Yangtze Craton, China
shale gas play: Cambrian shale gas accumulation in the Yangtze Craton, ChinaHaikuan Nie, Zhongbao Liu, Zhijun Jin, Zhiliang He, Quanyou Liu, Changbo Zhai, Shuangjian Li, Wei Dang, Ke Zhang, and Yuanjia Han
Ahead of Print Abstract
shale gas play. An integrated analysis of lithofacies, sedimentology, reservoir properties, thermal maturity, and hydrocarbon generation-expulsion history indicates that most productive shale gas reservoirs are predominantly located around the paleo-uplifts of the Yangtze Craton, where equivalent vitrinite reflectance (EqVRo) values are below 3.5%. During the Early Cambrian, deep-water depositional environments dominated the Yangtze Craton, leading to the widespread accumulation of black shale (20–80 m thick) across the central Sichuan Basin, Huangling, and central Guizhou regions. Unlike other cratonic regions, these areas later evolved into paleo-uplifts, resulting in relatively shallow burial depths and lower present-day thermal maturity (EqVRo 2%) and organic-poor silty shale (TOC o
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