AUTHOR=Hu Jiajia , Xia Xueqin , Li Wenlong , Zhang Kui , Tan Leichuan TITLE=Rapid Development of Unconventional Oil and Gas: Status, Challenges and Prospects of Shale Oil Extraction Technology JOURNAL=Frontiers in Energy Research VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.919966 DOI=10.3389/fenrg.2022.919966 ISSN=2296-598X