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 En

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

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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

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Chapter 1

Introduction

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Contents

 Definition

 Introduction

 History of reservoir engineering

 Tasks of the reservoir engineer

 Fundamental drive mechanisms

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Schlumberger Oilfield Glossary

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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, )

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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

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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

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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

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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

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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

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Specified Criteria

 Money associated with hired manpower, facilities, technologies,

 Time

 Local regulations

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Definition

oil field

1 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

2 n [Geology]

The surface area above a subsurface oil accumulation is called an oil field

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Oil Fields and Their Lifecycle

A lifecycle of an oil field consists of the following stages:

 Exploration

 Appraisal

 Development

 Production

 Abandonment

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Revenue Throughout LifeCycle

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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]

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History of reservoir engineering [2]

Ralph J Schilthuis

Active Oil and Reservoir Energy (1935)

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History of reservoir engineering

Morris Muskat

The flow of homogenous fluids

through porous media (1937)

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History of reservoir engineering

Stuart Edward Buckley, M C

Leverett

Mechanism of fluid displacement in

sands (1941)

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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?

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