04. Reservoir engineering ebooks

04. Reservoir engineering ebooks

This book that I’m presenting is considered as one of the best books in reservoir engineering also is a reference for many reservoir engineers that’s why I’m sharing this link to download it for free  
About the author : Ahmed TAREK

Tarek Ahmed, Ph.D., P.E., is a Reservoir Engineering Advisor with

Anadarko Petroleum Corporation. Before joining the corportion, Dr.

Ahmed was a professor and the head of the Petroleum Engineering

Department at Montana Tech of the University of Montana. He has a

Ph.D. from the University of Oklahoma, an M.S. from the University of

Missouri-Rolla, and a B.S. from the Faculty of Petroleum (Egypt)—all

degrees in petroleum engineering. Dr. Ahmed is also the author of other

textbooks including Hydrocarbon Phase Behavior(Gulf Publishing

Company, 1989), Advanced Reservoir Engineering(Elsevier, 2005), and

is currently completing a textbook entitled EOS and PVT Analysis.

The content of this book is as follows :

Chapter 1 : fundamentals of reservoir fluid behavior .

Chapter2:  reservoir fluid properties

Chapter 3 : laboratory analysis of reservoir fluids

Chapter 4 : fundamentals of rock properties

Chapter 5 : relative permeability concept

Chapter 6 : fundamentals of reservoirs fluid flows

Chapter 7 : oil well performance

Chapter 8 : gas well performance

Chapter 9 : gas and water conning

Chapter 10 : water influx

Chapter 11 : oil recovery mechanism

Chapter 12 : predicting oil reservoir performance

Chapter 13:  gas reservoirs

Chapter 14 : principales of water flooding

Chapter 15 : vapor-liquid phase equilibrium

Chapter 16 : analysis of decline and curve types 

03. Crude oil properties

03. Crude oil properties(1st part)

In first we should treat the properties of oil and once finished we would treat gas properties.

Crude Oil properties :

     1.     Density :

        Is defined as the mass per unit volume at a specified pressure and temperature  

        (P,T).

    

     

        It depends of the ratio of resino-asphaltic compound and also it depends on the
        ratio of solution gas contained in a volume of oil because when we have oil which 

        contains :

-         A lot of resino-asphaltic compounds so the relative density will be higher .

-         A lot of solution gas so the relative density will be lower.

We can now extend density to relative density by dividing the density upon the density of water (reference of liquids) which should be considered in the same temperature and pressure of oil 

   

The values of relative density are between 0,8 – 0,95 but we have exception for this rule for example :

-         Bakou         γ=0,7

-         Iran             γ=1,016

-         California   γ=1,01

In fact the most used are neither density nor relative density but it is API gravity which is equal to  :

1.  2.    Viscosity :

Is the resistance of oil to flow , it’s unit is centipoises

Viscosity depends on three mainly parameters :

2.1.         Temperature:

Temperature is inversely proportional to viscosity .

2.2.         Solution gas:

Solution gas quantity is inversely proportional to viscosity.

2.3.         Densite :

Densite  is proportional to viscosity.

For  oil  viscosity is between 0,7-3000 Cp₀

some exemples of oil viscosities are as follows :

-         Gabon oil is between  200-600 Cp₀

-         Algeria oil fields have an average of  2Cp₀ 

    3.    Formation Volume Factor :

      Is the ratio between a volume at reservoir condition upon a volume at standard       

      condition.

       This parameter is very important when we want to estimate our reserves of oil

        Remarks

3.1.          B₀ is always >1 since reservoir temperature is greater than 15,6°C

3.2.         At bubble point B₀ is maximum.