1 chapter 1 overview of petroleum reservoir engineering

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Definition of Reservoir

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In petroleum industry, reservoir fluids is a mixture of hydrocarbons (oil

and/or gas), water and other non-hydrocarbon compounds (such as H 2 S,

CO 2 , N 2 , )

Definition of Reservoir

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Reservoir fluids is a mixture of hydrocarbons (oil and/or gas), water and other non-hydrocarbon compounds (such as H 2 S, CO 2 , N 2 , )

Reservoir Structure

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Reservoir Cross-section

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Reservoir Structure

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Faults

Definition of Engineering

Engineering is the discipline or profession of applying

necessary knowledge and utilizing physical resources in

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Definition of Engineering

Engineering is the discipline or profession of applying necessary knowledge and utilizing physical resources in order to design, build and control systems or processes that realize a desired objective and meet specified criteria.

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Necessary Knowledge

Knowledge about oil & gas reservoirs

Production Process

Production Process

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Necessary Knowledge (cont’d)

Knowledge about Design & Analysis Tools

 Reservoir Characterization & Modeling

 Reservoir Simulation

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Definition of Engineering

Engineering is the discipline or profession of applying necessary knowledge and utilizing physical resources in order to design, build and control systems or processes that realize a desired objective and meet specified criteria.

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Physical Resources

In-place Reservoir Resources

pressure & drive mechanisms during production

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Definition of Engineering

Engineering is the discipline or profession of applying necessary knowledge and utilizing physical resources to design, build and control systems or processes that realize a desired objective and meet specified criteria.

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Design, Build & Control Systems

 Plan for producing oil & gas from the reservoirs in the field : Exploit reservoir energy sources; Design appropriate well patterns; Select suitable subsurface & surface facilities

 Manage the oil field throughout its entire life cycle:

enhancement, production optimization.

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Definition of Engineering

Engineering is the discipline or profession of applying necessary knowledge and utilizing physical resources in order to design, build and control systems or processes that realize a desired objective and meet specified criteria.

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Desired Objectives

• To maximize the profit resulted from the

recovered oil & gas

reservoirs

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Definition of Engineering

Engineering is the discipline or profession of applying necessary knowledge and utilizing physical resources in order to design, build and control systems or processes that realize a desired objective and meet specified criteria.

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Specified Criteria/Constraints

– Money associated with hired manpower, facilities,

technologies,

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Oil Fields and Their Lifecycle

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Oil Fields and Their Lifecycle

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

Oilfield Life Cycle and E&P Project Team

Geology and

Geophysics

Drilling and Operations Engineering Petrophysics

Production Geology / Seismology

Economics Production Technology Reservoir Engineering

Select a concession Select a location Find new Hydrocarbons

Drill and test wells safety and efficiently

Evaluate the formation and quantity the amount of HC near the well

Interpret and extrapolate the well data to describe the reservoir

Check whether the venture is economically justified Design well completions and artificial lift systems Identify development options and predict recovery

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Reservoir Engineering

& Other Disciplines Economics

Drilling and Operations Engineering

Production Geology /

Reservoir Engineering

Production Operations Production Technology Reservoir Engineering

Reservoir characterization Design field development plans

Select the most profitable development option

Drill and complete wells safety and efficiently

Plan and evaluate wells Update the reservoir model if required Operate and maintain wells and surface facilities

Optimise production performance

Monitor reservoir performance Identify means to improve recovery

Modified from Peter Behrenbruch, 2005

Oilfield Life Cycle and E&P Project Team

Revenue Throughout LifeCycle

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Working Areas of Reservoir Engineers

Reservoir Engineering Functions

OGIP)

 How much do we have?

 How much can we get?

 How quickly can we get it?

 How much will we make?

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Source: Peter Behrenbruch, 2005

Multi-disciplinary Working Environment

Oil Recovery Phases

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EOR – Steam Flooding

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EOR - CO 2 Injection Method

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EOR - Chemical Flooding

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Data Sources & Reservoir Characterization

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Data Sources & Reservoir Characterization

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Data Sources & Reservoir Characterization