Chapter 1 introduction

Vietnam National University - Ho Chi Minh City University of Technology Faculty of Geology & Petroleum Engineering Department of Drilling - Production Engineering Course Reservoir Engineering Trần Nguyễn Thiện Tâm Email: trantam2512@hcmut.edu.vn 12/11/2017 Reservoir Engineering References [1] Abdus Satter, Ghulam Iqbal, James L Buchwalter, Practical Enhanced Reservoir Engineering: Assisted with Simulation Software PennWell Corp., 2008 [2] Brian F Towler, Fundamental principles of reservoir engineering Society of Petroleum Engineers, 2002 12/11/2017 Reservoir Engineering Chapter Introduction 12/11/2017 Reservoir Engineering Contents  Definition  Introduction  History of reservoir engineering  Tasks of the reservoir engineer  Fundamental drive mechanisms 12/11/2017 Reservoir Engineering Schlumberger Oilfield Glossary 12/11/2017 Reservoir Engineering Definition reservoir A subsurface body of rock having sufficient porosity and permeability to store and transmit fluids Sedimentary rocks are the most common reservoir rocks because they have more porosity than most igneous and metamorphic rocks and form under temperature conditions at which hydrocarbons can be preserved A reservoir is a critical component of a complete petroleum system In petroleum industry, reservoir fluids is a mixture of hydrocarbons (oil and/or gas), water and other non-hydrocarbon compounds (such as H2S, CO2, N2, ) 12/11/2017 Reservoir Engineering Definition Engineering is the discipline or profession of applying necessary knowledge and utilizing physical resources in order to design and implement systems and processes that realize a desired objective and meet specified criteria 12/11/2017 Reservoir Engineering Necessary Knowledge Knowledge about oil & gas reservoirs:  Reservoir Rock Properties & Behavior during the Production Process  Reservoir Fluid Properties & Behavior during the Production Process  Fluid Flows in Reservoirs Technical & Scientific knowledge:  Quantitative Methods for Reservoir Characterization  Quantitative Methods for Reservoir Evaluation 12/11/2017 Reservoir Engineering Physical Resources In-place Reservoir Resources  Reservoir’s energy source resulted from the initial pressure & drive mechanisms during production  Available flow conduits thanks to reservoir’s characteristic properties such as permeability distribution 12/11/2017 Reservoir Engineering Design and Implementation Design and Implement an Oil Field Development Plan  Plan for producing oil & gas from the reservoirs in the field: Exploit reservoir energy sources;  Design appropreate well patterns;  Select suitable subsurface & surface facilities during the lifecycle of the oil field 12/11/2017 Reservoir Engineering 10 Desired Objective To Maximize the profit resulted from the recovered oil & gas  To recover as much as possible oil & gas from the reservoirs  To recover high-quality oil & gas 12/11/2017 Reservoir Engineering 11 Specified Criteria  Money associated technologies,  Time  Local regulations 12/11/2017 with hired manpower, Reservoir Engineering facilities, 12 Definition oil field n [Geology] An accumulation, pool or group of pools of oil in the subsurface An oil field consists of a reservoir in a shape that will trap hydrocarbons and that is covered by an impermeable or sealing rock Typically, industry professionals use the term with an implied assumption of economic size n [Geology] The surface area above a subsurface oil accumulation is called an oil field 12/11/2017 Reservoir Engineering 13 Oil Fields and Their Lifecycle A lifecycle of an oil field consists of the following stages:  Exploration  Appraisal  Development  Production  Abandonment 12/11/2017 Reservoir Engineering 14 Revenue Throughout LifeCycle 12/11/2017 Reservoir Engineering 15 Introduction Reservoir engineering is the heart of petroleum engineering In essence, reservoir engineering deals with the flow of oil, gas, and water through porous media in rocks and also with the associated recovery efficiencies Reservoir engineers play an active and important role throughout the reservoir life cycle and in the various phases of the reservoir management process.[1] 12/11/2017 Reservoir Engineering 16 History of reservoir engineering [2] Ralph J Schilthuis Active Oil and Reservoir Energy (1935) 12/11/2017 Reservoir Engineering 17 History of reservoir engineering Morris Muskat The flow of homogenous fluids through porous media (1937) 12/11/2017 Reservoir Engineering 18 History of reservoir engineering Stuart Edward Buckley, M C Leverett Mechanism of fluid displacement in sands (1941) 12/11/2017 Reservoir Engineering 19 Tasks of the reservoir engineer [2] How much oil and gas is originally in place? What are the drive mechanisms for the reservoir? What are the trapping mechanisms for the reservoir? What will the recovery factor be for the reservoir by primary depletion? What will future production rates from the reservoir be? How can the recovery be increased economically? What data are needed to answer these questions? 12/11/2017 Reservoir Engineering 20