WBPC2019 Abstract #14
Co- Authors: W. Yuan, University of Regina, L. Xiao, Husky Energy and C. Su, CNOOC-Shanghai
Production decline analysis for multistage hydraulically fractured horizontal wells (MHFHW) plays a key role in the process of developing unconventional resources, such as Bakken tight oil, Eagle ford shale oil and Barnett shale gas, mainly due to the huge cost and risk associated with successful drilling and completing of MHFHW. The current worldwide technology trend in unconventional resource and even conventional resource exploitation under very complicated reservoir environment requires solid technical capacity to enable petroleum engineers to understand, analyze and characterize well performance under complicated real reservoir situation. Understanding production decline behaviour of MHFHW with the consideration of completion parameters and reservoir system information is challenging. This presentation will show our recent outcomes in modeling and analyzing production decline of MHFHW and its application in some unconventional reservoirs. Basically there are two categories of information to be integrated to conduct well performance analysis. One is the commonly known reservoir properties, normally including porosity, permeability, reservoir compressibility, viscosity, etc. the other is the systematic reservoir-well-fracture geometry information which is strongly related to well spacing optimization and the pattern of hydraulic fracture networking around MHFHW. It has been found out that these two categories of information can be uniquely integrated together in sets of systematically comparable and analytically accurate modified dimensionless type curves for both two-dimensional and three-dimensional unconventional reservoirs with heterogeneity settings. This new outcome will definitely empower reservoir engineer’s capacity in analyzing and characterizing the performance of MHFHW for unconventional resources development.