Content

I-Decline Curve Analysis

1) Introduction

2) Definition

3) Advantages of DCA

4) Decline curve Problems

5) Reducing Mistakes in Decline Curves

6) Forecasting Group of Wells

7) Decline Curve Shapes

8) Decline Curve Analysis (DCA) :Exponential Decline

9) Reservoirs Types with Exponential Decline + Example

10) DCA:Hyperbolic Curve

11) Decline Curves Assume Pseudosteady State

12) Transient versus Pseudosteady State Decline

13) Reservoir Types with Hyperbolic Decline

14) Decline Curve Analysis:Harmonic Decline + Example

15) DCA: Time at abandonment

16) Summary

17) Examples

II– Drive Mechanisms

1) Reservoir Depletion

2)  Reservoir Types and Process

3)  Performance of  Oil Reservoir

4)  Primary Recovery Mechanisms:Definition

5)  Primary Recovery Mechanisms: Rock and Liquid Expansion

6)  Primary Recovery Mechanisms:Depletion Drive

7)  Primary Recovery Mechanisms:Gas Cap Drive

8)  Primary Recovery Mechanisms:Water Drive

9)  Primary Recovery Mechanisms :Gravity Drainage Drive

10)  Primary Recovery Mechanims: Combination Drive + Schematic Picture

11)  RF

III– Material Balance

1)  Introduction

2)  Basic assumptions

3)  Terms  & Symbols

4)  Example:Combination Drive

5)  Material Balance :SolutionGas Drive above Pb

6)  Material Balance :SolutionGas Drive below Pb

IV– Oil Reservoir

1)  MBE:Block Diagram of a Producing Reservoir

2)  MBE:Principle of Material Conservation

3)  MBE:FVF (PVT Analysis or Correlations)

4)  MBE: Solution Gas-Oil Ratio (PVT Analysis/Correlations/Field)

5)  MBE:Initial & Final Fluid Conditions

6)  MBE: Generalized Equation

7)  MBE: Saturation and Pressure Reservoir Development

8)  MBE: Applications

9)  MBE:Applications-Initial Gas-Cap (Havlena –Oden)

10)  MBE:Applications-Water influence (Havlena –Oden)

11)  MBE: Symbols Used

V– Gas Reservoir

1) MBE Gas Reservoir :Introduction

2) MBE Gas Reservoir : Generalized Equation

3) MBE Gas Reservoirs: Estimation of OGIP for a volumetric Reservoir

4) MBE Gas Reservoirs:Estimation of OGIP for a water Drive Reservoir

5) MBE Gas Reservoirs:Estimation of OGIP for a Dry Gas Reservoir

6) MBE:Gas Reservoirs:Recovery Factors with Water Influx

7) MBE:Gas Reservoirs: Abnormally Pressure Reservoirs

VI– Volumetric & Reserves

1) Volumetric Calculation: Contour Area/Scenario Approach/Probabilistic Approach/Objectives of Probalistic Methods

2) Reserves:Basic Concept

3) Reserves:Objectives

4) Reserves:Classifications

5) Reserves Classifications:MC Kelvey Box

6) Reserves Classification:SPE/WPC  Classification

7) Probalistic Definitions and Concepts

8) Proved Reserves

9) Reserves Classification:SPE /WPC /AAPG (Classification

10) Reserves Classification:SPE /WPC /AAPG (2000)

11) Reserves /Ressources Classification System

12) Definitions

13) SPE /WPC /AAPG System

14) Strenghts & Weaknesses of SPE /WPC /AAPG System

15) United Nations Framework Classification (UNFC)

16)  Strengths & Weaknesses of UNFC System

17) Reserves Estimating Methods

18) Recoverable Volumes

19) Rf-Sensivity Parameters

20) Recoverable Volumes Estimates obtained with Multiple & Single RF Representations

21) Developed Reserves for a Developed Reservoir

22) 1P,2P,3P,expected Value (EV), and Remaining Reserves Variations with time