Oil & Gas Well Performance: Impact of Damage and Stimulation

Introduction:

The course on Oil & Gas Well Performance: Impact of Damage and Stimulation will cover NODAL analysis for production systems in depth. Participants will master the well production rate as a function of reservoir and fluid properties, wellbore configuration, and flowing wellhead pressure. The course will also assist in diagnosing elements in the reservoir, completion, and wellbore system that may interfere with optimum performance.

Additionally, it will address well performance by studying perforation, sand control, and acidizing of the well. The study will evaluate the effect of hydraulic fracturing on reservoir performance and the contribution of horizontal wells toward enhancing reservoir efficiency. Practical examples will elaborate on the theoretical concepts of the course.

Objectives:

At the end of the Oil & Gas Well Performance: Impact of Damage and Stimulation course, participants are expected to be able to undertake the following activities:

• Express Well Performance Analysis concepts by modeling the full producing stream comprising a reservoir, completion, wellbore, and gathering system.
• Conduct proper well performance analysis.
• Analyze skin, well completion, and its damage effects on well inflow performance.
• Delimit the horizontal well effect on inflow performance.

Training Methodology:

• Lectures and presentations
• Case studies
• Group discussions
• Hands-on simulations
• Determinations and evaluations
• Guest experts

Course Outline:

Unit 1: Concept of Well Performance Analysis
Objectives:

• Objective of Well Performance Analysis.
• Reservoir Performance (IPR): Steady State, PSS, Transient Flow.
• Productivity Index (PI), Effects of PVT.
• Solution Gas Drive. Non-linear IPR Relationships.
• Gas Flow, Different Pressure Relationships. Non-Darcy Flow.
• Nodal Analysis: Concept and Assumptions.
• Inflow and outflow performance relationship.

Unit 2: System Pressure Losses:

• General Pressure Drop Equation for Pipes.
• Equation/Graphical Representation of Critical Flow.
• Systems Plot Analysis and its Application.
• Localized Pressure Loss In Nodes.
• Modeling Surface Networks.
• The idea of Artificial lift.

Unit 3: Skin, Well Completion and Well Inflow Damage:

• Skin Component Identification and Analysis.
• Perforations: Geometry, Penetration, Flow Profiles, Perforation Skin Modeling.
• Sand Control Mechanisms of Sand Production and Sand Exclusion Methods.
• Gravel Pack Damage and Skin.
• Formation Damage Mechanisms and its Effect on Skin.
• Chemical Damage Removal Remedies and Matrix Stimulations.

Unit 4: Hydraulic Fracturing:

• IPR of Fractured Well Stimulation Candidates in Selection Process.
• Rock Mechanics and Its Relevance to Fracturing Treatment and Its Reversal.
• Design of Fracturing Treatment.
• Fracture Conductivity and Skin.
• Effects of Fluid and Proppant on Fracture Conductivity and Reservoir Performance.
• Acid Fracturing of Carbonate Reservoirs.

Unit 5: Horizontal Wells:

• Horizontal well IPR and Boundary effects.
• Coning/Cusping Relationships.
• Relative Skin Effects in Horizontal Completions – Stimulation of horizontal wells.
• Practical Case of Well Performance.