Decline Curve Analysis and Diagnostic Methods for Performance Forecasting - DCA
Discipline: Reservoir Engineering
Duration: 2 days
Instructor(s): Richard Henry, Stanley Kleinsteiber
Decline curve analysis has been called the most commonly used and misused technique for forecasting future production and remaining reserves. This course will give the learner a better understanding of how fundamental reservoir properties and drive mechanisms affect the shape of the production decline curve and how to avoid many of the mistakes commonly found in decline curve forecasts. The course also examines the use of modern production decline type-curves to evaluate reservoir properties and predict future performance. One personal computer is provided, at additional cost, for each two participants in non-virtual sessions.
Engineers or technical assistants who are responsible for making forecasts of future production using decline curves analysis. Economists, managers, or geoscientists who are interested in developing a greater working knowledge of decline curve methods and how to make better forecasts will also benefit from this course.
You Will Learn:
- Use the exponential, hyperbolic and harmonic decline curve equations
- See the relationships between reservoir recovery mechanisms and decline curve types
- Identify and understand how the transient flow period can lead to an overestimation of reserves
- Use multiple methods to avoid overestimating reserves
- Recognize reservoir performance characteristics based on actual field examples
- See the impact of reservoir heterogeneities such as faulting, permeability variance, and layering
- Account for changing operating conditions
- Perform analysis on a multi-well basis without introducing common errors
- Use alternative methods including diagnostic performance plots (e.g., log WOR vs. Np, Stagg's, P/Z vs. Gp, etc.) for rate and reserves analysis
- Use advanced decline curve and production data analysis for reservoir characterization: flow regime, hydrocarbons-in-place, permeability, skin, drainage area, fracture properties, etc.
- Conventional decline curve equations: exponential, hyperbolic and harmonic rate versus time and rate versus cumulative production relationships, selecting the proper equation based on reservoir properties and drive mechanisms
- The effects of transient production: how to recognize transient production, how transient forecasts can overestimate remaining reserves, how to properly constrain transient forecasts
- Forecasting during displacement processes: using trends like water-oil ratio and versus cumulative oil production to estimate ultimate oil recovery, converting these trends into an oil rate versus time forecast
- Difficult situations: layered and compartmented reservoirs, downtime, workovers, changing facility conditions and facility constraints, forecasting groups of wells, common mistakes
- Production decline type-curves: introduction and historical background, how to use modern Fetkovich type-curves for forecasting production
- Brief discussion of unconventional gas/oil reservoir decline analysis and production forecast
Mr. RICHARD HENRY is an independent reservoir simulation specialist who is either out on a sailboat or teaching for PetroSkills in his spare time. He has degrees in industrial and petroleum engineering, and has performed over fifty reservoir engineering studies over two decades on a variety of different simulation platforms, field sizes and reservoir types. Before discovering simulation, he audited reserves of oil and gas fields in Latin America and West Africa, and ran multi-national, multi-disciplinary field optimization teams for Texaco. Mr. Henry holds a B.S. in Industrial Engineering and an M.S. in Petroleum Engineering from the University of the West Indies, St. Augustine, Trinidad.
MR. STANLEY KLEINSTEIBER is a Senior Petroleum Engineer with MHA Petroleum Consultants Inc., a Denver-based petroleum consulting firm. Mr. Kleinsteiber has over 24 years of petroleum engineering experience and has authored or co-authored papers dealing with production decline type curve analysis, CO2 flooding, and depletion of a rich gas condensate reservoir by nitrogen injection. Since joining MHA he has performed reservoir engineering studies in numerous US basins, Canada and Australia, as well as co-developed an in-house gas reservoir engineering course for clients such as BP, Japan National Oil Company (Tokyo), and EGPC (Cairo). Mr. Kleinsteiber has experience related to exploration well testing in the Mediterranean Ocean offshore Israel. He has also performed field development studies for coalbed methane reservoirs in the Bowen Basin of eastern Australia, and well test analyses for exploration wells in Hungary. Prior to joining MHA, he held various reservoir engineering positions with Amoco Production Company both in their Tulsa, Oklahoma research center and Denver regional production office. Mr. Kleinsteiber's last position with Amoco was Western Business Unit Technology Coordinator where he was an internal consultant to the business unit's engineering staff in the Rocky Mountain and Mid-Continent regions. Mr. Kleinsteiber and his colleagues at Amoco developed the initial plan of depletion for fields in Wyoming and Utah using compositional numerical simulation. His specific contributions were in the areas of fluid property characterization, well testing and simulation studies for various development options. Mr. Kleinsteiber also directs continued development of MHA's GAS3D reservoir simulator and software for production decline type curve analysis. He received a BS in petroleum engineering with highest honors from the University of Oklahoma in 1978.
In-House Course Presentations
All courses are available for in-house presentation to individual organizations. In-house courses may be structured the same as the public versions or tailored to meet your requirements. Special courses on virtually any petroleum-related subject can be arranged specifically for in-house presentation. For further information, contact our In-House Training Coordinator at one of the
numbers listed below.
Telephone 1- 832 426 1234
Facsimile 1- 832 426 1244
Public Course Presentations
How to contact PetroSkills:
1-800-821-5933 toll-free in North America or
Address P.O. Box 35448, Tulsa, Oklahoma 74153-0448, U.S.A