Hedong Sun, PhD, SPE member, born in 1973, professional senior engineer, earned his PhD degree from Xi'an Jiaotong University in 2004. Since 2004, he has been a Research Engineer in Research Institute of Petroleum Exploration and Development of Petrochina. He has about 25 years of reservoir engineering experience with a focus on well test analysis and production data analysis. He has published over 60 papers in peer-reviewed journals and SPE conferences. He is an author of 4 books published by Elsevier, including Advanced Production Decline Analysis and Application, Well Test Analysis for Multilayered Reservoir with Formation Crossflow, Dynamic Well Testing in Petroleum Exploration and Development, among others.Tongwen Jiang, PhD is an engineer and earned his PhD degree in oil & gas field development engineering from Southwest Petroleum Institute in 1996.He began working for Tarim Oilfield Company in 1996, and he has deep experience in reservoir studies and management. He has published over 30 papers about complex oil & gas reservoir studies such as condensate gas reservoirs and fractured reservoirs. He is an author of 4 books and an active member of the Society of Petroleum Engineer and the American Association of Petroleum Geologists.Xingliang Deng, PhD is a senior engineer at the Research Institute of Petroleum Exploration & Development of the Tarim oilfield. Since he graduated from China University of Petroleum in 1992, he worked in the Tarim oilfield and specialized in reservoir description, well position deployment and development programs for fractured-vuggy carbonate reservoirs, such as Tazhong1, Lungu, Halahatang and the Yingmaili reservoir. He holds a BS degree in petroleum and natural gas geological exploration technology from China University of Petroleum, and a PhD degree in Petroleum Geology from Nanjing University. He has published over 40 papers in peer-reviewed journals and conferences. He is an author of one book published and an active member of the Society of Petroleum Engineers.