Well test interpretation, which is the process of obtaining information about a reservoir by analyzing the pressure transient response caused by a change in production rate, plays a very important part in making overall reservoir-management decisions. From the authors of Pressure Transient Testing and Well Testing, Spivey and Lee introduce the readers of Applied Well Test Interpretation to the fundamentals of this critical piece of decision-making by focusing on the most basic well testing scenario; a single-well test on a well producing a single-phase fluid, from a single-layer, homogeneous reservoir. Available in print, digital, and digital rental formats.

Introduction

Acknowledgments

1. Introduction to Applied Well Test Interpretation

1.1 Introduction

1.2 Applications of Well Testing

1.3 Alternatives to Conventional Well Testing

1.4 Forward and Inverse Problems

1.5 Well Test Interpretation Methods

1.6 Rock and Fluid Properties

1.7 Graph Scales

1.8 Summary

Nomenclature

2. Fluid Flow in Porous Media

2.1 Introduction

2.2 Steady-State Flow

2.3 Development of the Diffusivity Equation

2.4 Infinite-Acting Radial Flow - Ei-Function Solution

2.5 Principle of Superposition

2.6 Radius of Investigation

2.7 Damage and Stimulation

2.8 Pseudosteady-State Flow

2.9 Wellbore Storage

2.10 Summary

Nomenclature

3. Radial Flow Semilog Analysis

3.1 Introduction

3.2 Drawdown Tests

3.3 Buildup Test Following Constant-Rate Production

3.4 Estimating Average Reservoir Pressure

3.5 Flow Rate Variations Before Shut-In

3.6 Summary

Nomenclature

4. Log-Log Type Curve Analysis

4.1 Introduction

4.2 Dimensionless Variables

4.3 Gringarten-Bourdet Type Curves

4.4 Manual Parameter Estimation Using the Log-Log Plot

4.5 Calculating the Logarithmic Derivative From Field Data

4.6 Summary

Nomenclature

5. Pressure Transient Testing for Gas Wells

5.1 Introduction

5.2 Gas Flow Equation

5.3 Gas-Well Drawdown Tests

5.4 Gas-Well Buildup Tests

5.5 Summary

Nomenclature

6. Flow Regimes and the Diagnostic Plot

6.1 Introduction

6.2 Power-Law Function Pressure Response

6.3 Radial Flow

6.4 Linear Flow

6.5 Volumetric Behavior

6.6 Spherical Flow

6.7 Bilinear Flow

6.8 Other Flow Regimes

6.9 Practical Aspects of Flow Regime Indentification

6.10 Summary

Nomenclature