AUTHOR=Liu Haomin , Zhang Ran , Cui Ruikang TITLE=Gas content prediction model considering multi-factor coupling on shale by simplified local density model JOURNAL=Frontiers in Earth Science VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2025.1519040 DOI=10.3389/feart.2025.1519040 ISSN=2296-6463