AUTHOR=Yin Shujun , Zhang Jianliang , Deng Hucheng , Qin Hao , Xia Wenhao , Du Yu , Gong Ming , Huang Tao , Li Chang TITLE=Evaluation methods and engineering applications of in-situ stress in deep, strong heterogeneity terrestrial shale oil and gas reservoirs: a case study of jurassic shales in the Yingshan-Pingchang area, northeast Sichuan JOURNAL=Frontiers in Earth Science VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2025.1530002 DOI=10.3389/feart.2025.1530002 ISSN=2296-6463