Oil and Gas
This course provides participants with the advanced skills and understanding required to interpret and analyze complex pressure transient tests in oil, gas, and water injection wells. Simple models are used to illustrate principles and to analyze real reservoirs. More complicated models are introduced as extensions of the simple models.
Well testing and pressure transient testing provide valuable reservoir characterization information required for reservoir studies, well spacing considerations, and stimulation design and analysis. Test analysis provides estimates of in-situ permeability in the drainage area of wells, location of flow barriers, and stimulation effectiveness. This information and analysis will ultimately help reservoir management and field development teams to optimize the productive potential of their reservoirs and fields.
Duration and Training Method
A four-day classroom course comprising lectures with worked examples, hands-on exercises, and discussion. Approximately 25% of class time is spent on computer-based exercises.
Participants will learn to:
- Estimate depth of investigation achieved during transient tests.
- Identify wellbore storage-distorted well-test data.
- Identify flow regimes during transient tests and establish the likely reservoir model to use in test interpretation.
- Estimate well and reservoir properties, including permeability, skin factor, average drainage area pressure, and distance to important heterogeneities.
- Estimate reservoir properties in complex wells and reservoirs, including horizontal wells, hydraulically fractured wells, and naturally fractured reservoirs.
- Establish appropriate well test objectives and design tests to achieve those objectives.
The course addresses identification of both simple and complex reservoir models, quantification of important reservoir properties in homogeneous-acting, bounded, and infinite-acting, naturally and hydraulically fractured reservoirs, and analysis of both vertical and horizontal wells.
Topics covered by this course:
- Basic concepts - Fluid flow through porous media
- Type curve analysis
- Formation damage and stimulation
- Modification for gases and multiphase flow
- Diagnostic plots
- Buildup tests and the diagnostic plot
- Phase redistribution
- Bounded reservoirs
- Multiwell testing
- Estimating average reservoir pressure
- Hydraulically fractured wells
- Naturally fractured reservoirs
- Pressure transient analysis for horizontal wells
- Effects of errors in input data
- Well test design
- Integrated well test interpretation
Who Should Attend and Prerequisites
The course is designed for mid to senior level engineers and engineering managers.
John Lee served as an Academic Engineering Fellow with the U.S. Securities & Exchange Commission (SEC) in Washington during 2007-8, and was a principal architect of the new SEC rules for reporting oil and gas reserves.
He worked for ExxonMobil, specializing in integrated reservoir studies, prior to joining the A&M faculty. He later was Regents Professor of Petroleum Engineering at Texas A&M. While at A&M, he also served as a consultant with S.A. Holditch & Associates, where he specialized in reservoir engineering aspects of unconventional gas resources.
John is the author of three textbooks published by SPE and has received numerous awards from SPE, including the Lucas Medal, the DeGolyer Distinguished Service Medal and Honorary Membership.
Affiliations and Accreditation
PhD Georgia Institute of Technology - Chemical Engineering
MSc Georgia Institute of Technology- Chemical Engineering
BSc Georgia Institute of Technology - Chemical Engineering
U.S. National Academy of Engineering and the Russian Academy of Natural Sciences
Lucas Medal, the DeGolyer Distinguished Service Medal and Honorary Membership
N908: Well Test and Pressure Transient Analysis
N957: Forecasting Production and Estimating Reserves in Unconventional Reservoirs