[Society of Exploration Geophysicists 2nd SEG Rock Physics Workshop: Challenges in Deep and Unconventional Oil/Gas Exploration, 25–27 October 2019, Qingdao, China - Qingdao, China (25 October to 27 October)] 2nd SEG Rock Physics Workshop: Challenges in Deep and Unconventional Oil/Gas Exploration, 25–27 October 2019, Qingdao, China - Application of frequency-dependent AVO inversion to identify gas reservoirs of shale in Da'anzhai Member of Yingshan area, Sichuan Basin