Well Test Design and Analysis with PIE and Saphir softwares
Overview
The purpose of this course is to teach the practical aspects of well test analysis and explain the contribution of well test analysis to reservoir characterisation and to the prediction of well performance.
Learning Objectives
At the end of this course, participants will be able to:
• Understand the fundamental concepts of well test analysis
• Understand what results can be obtained from well test analysis
• Interpret any well test using modern analysis techniques
• Monitor well performance and understand the effects of well clean-up and two-phase flow.
• Diagnose injection well problems through successive pressure falloff tests.
• Know how to use and judge some of the prevailing commercial well test analysis software products
Course Content
| DAY | MORNING | AFTERNOON |
|---|---|---|
| 1 | • Introduction to well testing: why do we test wells, types of well tests, DST string, surface facilities, best practices in the industry. • Well Test Theory and Practice: Theory on initial drawdown and application to PBU, definition of radial flow regime and other flow regimes, review of skin, definition of the well testing tools (derivative, ΔP plot, Horner plot, Superposition plot, Data-plot) | • Interactive “live” example : use the well testing tools and perform a well test analysis of an appraisal gas condensate well. |
| 2 | • Introduction to the well test responses of different types of wells (vertical well with limited perforations, horizontal well, well with hydraulic fracture, partial penetration fracture) and reservoirs (homogeneous, linear composite, radial composite) with the associated matching procedures. • Deconvolution: the driving tool for the analysis (benefits, limitations, validity) • Interactive “live” example: revisit the appraisal well test from day 1, apply deconvolution for a better analysis. | • Well Test Analysis Workflow • Interactive “live” exercise: create a well test file using PIE software and perform a well test analysis of an appraisal deepwater oil well with tides on the downhole gauge. |
| 3 | • Interactive “live” exercise: create a well test file using Saphir software and perform an analytical then numerical well test analysis of an appraisal gas condensate well. | • Common factors that complicate well test analysis (rate uncertainty, sampling, gauge drift, noise, slow shut-in, short duration, coning, poor isolation, ops issues, etc) • Focus on wellbore phase redistribution |
| 4 | • Well Test Analysis in multilayer reservoirs • Well Test Analysis in naturally fractured reservoirs • Interactive "live" exercise: perform a well test analysis of a stimulated well in a naturally-fractured reservoir. | • Horizontal Well Basics • Interactive “live” exercise: perform a well test analysis of a horizontal well in a depleted gas reservoir. |
| 5 | • Horizontal Well Advanced Analysis • Well Test Design with interactive examples | • Well test analysis in production and injection wells (derivative overlay, diagnostic, workover, average reservoir pressure, multiphase) • Interactive “live” exercise: interpret the pressure and rate data of a production well with a permanent downhole gauge. |
