Well Test Analysis for Multilayered Reservoirs with Formation Crossflow

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. Chengtai Gao (deceased) graduated from the mathematics department of mechanics from Peking University. He had more than 40 years of industry experience in well testing, reservoir description, and production and reservoir engineering. He worked for Sichuan, Jianghan, and Changqing oil field early in his career and specialized in reservoir engineering and application software development. He was a visiting scholar at the University of Houston and Rice University in 1981-1983 where he specialized in well test analysis for multilayered reservoir with crossflow. He joined the Xi'an Petroleum University where he specialized in gas reservoir engineering aspects of low-permeability gas reservoir. He had published over 30 papers in peer-reviewed journals and SPE conferences.

• 1. Semipermeable Wall Model of a Multilayer Reservoir with Crossflow2. Single-Phase Fluid Flow in a Two-Layer Reservoir with Significant Crossflow3. Pressure Transients and Crossflow Caused by Diffusivities in Multilayer Reservoirs4. Crossflow Behavior and the Determination Reservoir Parameters by Drawdown Tests in Multilayer Reservoirs5. Determination of Total Productivity by a Constant Wellbore Pressure Flow Test and the Crossflow Behavior in Multilayer Reservoirs6. Determination of Individual Layer Properties by Layer-by-Layer Well Tests in Multilayer Reservoirs with Crossflow7. Determination of Parameters for Individual Layers by Transient Well Tests in Multilayer Reservoirs8. Interpretation Theory for Vertical Interference Testing Across a Low-Permeability Zone9. Unsteady Crossflow Model for Leaky Vertical Interference Testing Across a Low-Permeability Zone10. Material Balance Equation of Multilayer Gas Reservoir11. Computer-Aided Well Test Design and Well Test Analysis of Layered Reservoirs