Reservoir Engineering of Conventional and Unconventional Petroleum Resources

Book excerpt: Reservoir Engineering of Conventional and Unconventional Petroleum Resources is a practical guide and handbook for engineers and geoscientists. It is also a complete textbook for teaching of reservoir engineering courses with exercises in each chapter. The sources and applications of basic rock properties are presented. Prediction of PVT properties from correlations and equations of state, and laboratory measurements of same properties from fluid samples are discussed. These basic data are applied in material balance analyses, volumetric calculation of hydrocarbons-in-place and reserves, and analyses of reservoir performance using case histories. Production forecasts for conventional and unconventional reservoirs using Arps' decline equations in decline curve analyses (DCA) are presented. The applications of modified Arps' decline equations coupled with transient flow models in rate transient analyses (RTA) are illustrated. Dr. Ezekwe presents fundamental equations and methods for pressure transient analysis (PTA) for fractured and unfractured wells in conventional reservoirs. This is accompanied with well test analyses in unconventional reservoirs using diagnostic fracture injection tests (DFIT). Secondary recovery methods focused on waterflooding, gasflooding, and low salinity waterflooding are demonstrated. Enhanced oil recovery methods are discussed. Dr. Ezekwe recommends experience-based practical procedures for geologic modeling, reservoir characterization, reservoir simulation, and reservoir management. Fundamental economic decision criteria including profitability index, net present value, rate of return are demonstrated with examples. Reservoir Engineering of Conventional and Unconventional Petroleum Resources equips engineers with knowledge and skills on how to: Acquire basic rock and fluid properties Predict PVT properties for oil and gas reservoirs from correlations and equations of state Perform reserves evaluations for conventional & unconventional reservoirs using DCA methods Perform PTA and DFIT analyses for wells in conventional and unconventional reservoirs Conduct rate transient analyses (RTA) for unconventional reservoirs Implement waterflooding, gasflooding, and low salinity waterflooding projects Screen reservoirs for EOR processes and install field-wide EOR projects Build geologic models, reservoir models, and conduct reservoir simulation Develop and implement reservoir management strategies Perform economic evaluation of petroleum projects and resources. Build economic models of projects, fields, and resources