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0 Introduction

This document provides an agenda for a three-day well test analysis workshop presented by Petro Management Group Ltd. The workshop will cover topics such as flow equations, dimensionless parameters, boundary conditions, build-up and drawdown test analysis, hydraulically fractured wells, practical aspects of well testing, pressure transient analysis, gas well testing, water injectivity tests, naturally fractured reservoirs, well test planning and design, and the use of commercial software to analyze well tests. The document includes diagrams of typical well test equipment and a brief history of the development of pressure transient analysis.

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112 views7 pages

0 Introduction

This document provides an agenda for a three-day well test analysis workshop presented by Petro Management Group Ltd. The workshop will cover topics such as flow equations, dimensionless parameters, boundary conditions, build-up and drawdown test analysis, hydraulically fractured wells, practical aspects of well testing, pressure transient analysis, gas well testing, water injectivity tests, naturally fractured reservoirs, well test planning and design, and the use of commercial software to analyze well tests. The document includes diagrams of typical well test equipment and a brief history of the development of pressure transient analysis.

Uploaded by

Bright Moon
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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PM

G PETRO MANAGEMENT GROUP LTD.

Well Test Analysis


Workshop
By: Saad Ibrahim, P. Eng.
For information:
www.petromgt.com
September 2007

Petro Management Group


Quality Petroleum Engineering Consultants

Services:
Reservoir Studies (Conventional/Simulation)
Well Test Planning and Analysis
Waterflood Design
Government Submissions
Reserves and Economic Evaluations
Horizontal Well Applications
Customized Training

Well Test Analysis Workshop


Day 1:

Course Agenda

Review of the Flow Equations:


Equation of state, Darcy, and continuity equation
Common flow geometry

Dimensionless Parameters: definitions and Type Curve


use/applications
Boundary Conditions: infinite, pseudo steady state, and steady
state
Solutions to the Diffusivity Equation: (class problem)
Build-up Test Analysis:
Horner Plot; average reservoir pressure (MBH) method (class problem )
Principle of superposition
Reservoir boundaries and channel analysis

Wellbore Skin Factor and Partial Penetration (class problem)


Wellbore Storage: Use of Type Curves (class problem)
Draw-down Test Anaysis:
Application and test analysis and equivalent time
Reservoir Limit Testing (case examples)

Well Test Analysis Workshop


Day 2:

Course Agenda

Hydraulically Fractured Wells:


Fracture characterization (frac. half-length, conductivity and orientation)
Use of derivative, linear, and bilinear specialized plots to evaluate frac. efficiency

Practical Aspects Well Testing: How to get the most out of well testing ..
Prior to testing (well test objectives, types of tests, and test design)
During the test (monitoring, optimizing test design)
After the test: operational problems, data quality (pressure, production and fluids) several case examples

Pressure Transient Analysis (PTA): Step-by-Step


Flow regime diagnoses using the pressure derivative
Conventional analysis
History matching of pressure data and selection of reservoir models -case examples

Demonstration of Pressure Recorder Specs. (Lonkar Services)


AEUB Well Test Requirements: Guide 40 and Electronic Submission
Gas Well Testing:
P, P2, and pseudo pressure approach
Gas deliverability testing: single point and multi-point tests (class problem)
Simplified and L.I.T. techniques

Well Test Analysis Workshop


Day 3:

Course Agenda

Water Injectivity Tests:


Step-rate and fall-off tests (case examples)
Hall Plot (class problem)
Naturally Fractured Reservoirs - Characterization of the reservoir using:
Pollard and Pirson method (class example)
Warren and Root method (class example)
Bourdet and Kniazeff method
Well Test planning and Design:
Test equipment
Flow/Buildup test design (class example)
Isochronal test design (class problem)
Reservoir limit test (case example)
Reservoir boundaries (case problem)
Horizontal well test (case example)
Review/Analyze Well Test Provided by Attendees Using a Commercial
Software Package

Well Test Equipment


Diagram
Production data:
Produced fluids are measured at
surface (orifice meter)

Pressure Data:
Surface and BH data is collected
using pressure recorders

Fluid Samples:
Samples are collected at the surface
separator

By: Schlumberger

Pressure Transient Analysis (PTA)


History of Development:
Darcy Equation (1856)
Radial Analysis - Horner Plot (1951)
Type Curve - Gringarten (1970)
Pressure Derivative - Bourdet (1983)
History Matching - still developing

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