Training: WELL TEST ANALYSIS WORKSHOP
The objective of this course is to illustrate how to effectively use the most powerful reservoir management tool to maximize well production and characterize the reservoir. The course starts with a concise discussion of the theoretical aspects of the science/art of pressure transient analysis (PTA), including a description of flow geometry and boundary conditions. The various techniques to analyze different types of well tests will be reviewed including: flow/buildup, draw-down, reservoir limit test, modified isochronal, water injectivity tests, and more. Valuable tips on the practical aspects well testing will be discussed, including how to assess data quality to rectify the impact of some operational problems on the PTA. Rate transient analysis (RTA) techniques will be reviewed specially for tight and unconventional reservoirs. The use of commercial software, including Fekete FAST and KAPPA Saphir, will be used to analyze actual test data. Numerous case studies will be presented. Excellent course notes will be provided that could be used as a reference on the subject
When you sign up, you will learn about:
- The theory behind the PTA tools used commercial software “the black Box”, to understand various sensitivities of the reservoir parameters and their impact on test results.
- The use the pressure derivative tool to recognize the various flow regimes and the appropriate technique to analyze each individual test.
- How to recognize wellbore dynamics and their impact on test analysis.
- How to quantify wellbore damage and predict the production enhancement should the well be successfully stimulated.
- The fundamentals of performing pressure transient analysis for the most common well tests, including the Horner plot and type curve matching
- The use of the “deconvolution” technique for long production history
- Analyze of stimulated wells to quantify the effectiveness of an acid or frac treatments
- Mini Frac analysis (DFIT)
- Wellbore dynamics and how to use the primary pressure derivative (PPD) to differentiate between pressure anomalies caused by reservoir effects and wellbore dynamics
- Rate transient analysis (RTA) techniques including Advances type curves (Blasingame, Fetkovich), flowing material balance, rate-normalized tools.
- How to perform the complex test analysis of multi-stage frac horizontal to recognize Stimulated Reservoir Volume (SRV), contacted reservoir volume (CRV), and frac geometry
- Data quality evaluation to improve test analysis results.
- How to design common types of tests to ensure conclusive results are obtained.
- How to perform PTA using both the Fekete FAST and KAPPA Saphir software and numerious test analysis will be performed in the class.
The objective of the Well Test Analysis Workshop is to provide a comprehensive
theoretical and practical knowledge of well test analysis techniques. Emphasis will be
placed on the practical aspects of well testing and several class examples will be
offered; a scientific hand calculator will be required. Further, the use of the analysis
results as a reservoir management tool to make decisions related to reservoir
development and well completion will be illustrated through actual case studies
throughout the workshop. Recent developments in testing of Multi-stage Frac Horizontal
Wells (MFHW) and Mini fracing are now included. Also, to offer hands-on experience,
attendees are encouraged to bring interesting well tests for analysis and discussion in
the class, using commercial software. A detailed course hand-out, which is an excellent
reference, will be provided.
Who Should Attend:
This course is aimed at reservoir, petroleum and exploitation engineers/technologists,
geophysicists, and geologists who are involved in the field development and
exploitation. Also this course is aimed at all engineers and geologists involved in the applications of Pressure Transient Analysis (PTA) and Rate Transient Analysis (RTA) techniques.
Mr. Saad Ibrahim, P. Eng,
president of Petro Management Group Ltd. He has over 35 years of diversified experience in the oil and gas Industry as a worldwide highly recognized engineering consultant and a distinguished instructor. He also completed a post-graduate program with the University of Calgary in Chemical and Petroleum Engineering. The focus of Mr. Ibrahim’s experience lies in the area of Reservoir management, and well test planning/analysis. Mr. Ibrahim is a member of APEGA and SPE.
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
Solution of the diffusivity equation: (class problem)
Build-up test analysis:
- Principle of Superposition
- Horner Plot; average reservoir pressure (MBH) method (class problem)
- Reservoir boundaries and channel analysis
Wellbore skin factor and partial penetration (class problem)
Wellbore storage: use of type curves and (class problem)
- Application and test analysis and equivalent time
- Reservoir Limit Testing (case example – fracured basement)
- Deconvolution technique and applications
Hydraulically fractured wells
- Fracture characterization (frac. Half-length, conductivity and orientation).
- Use of type curve techniques and fourth-root time plot to evaluate frac. Efficiency
- Mini Fracs; benefits and test interpretations
Practical well testing. How to get the most out of well testing
- Prior to testing (Well test objectives, types of tests, test design)
- During the test (monitoring, optimizing test design)
- After the test: operational problems, data quality (pressure, production
and fluids) – numerous case examples
Well test interpretations
- Flow regime diagnoses using the pressure derivative
- Conventional analysis
- History matching of pressure data and selection of reservoir models
- Case examples
- Use of numerical techniques
AER well test requirements: Guide 40 and electronic submission
Gas well testing
- P, P2 and Pseudo pressure-time methods
- Gas deliverability testing: single point – Multipoint test (class problem)
- Simplified and L.I.T. techniques
- Unconventional gas testing (CBM, shale gas)
- Production analysis techniques; flowing material balance, Blasingame Type Curves, Agrawal normalized rate.
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 & Kniazeff method
Well test planning design
- Test equipment
- Flow/Buildup test design (class example)
- Isochronal test design (class problem)
- Reservoir limit test (case example)
- Horizontal well test (case example)
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