Well Test Analysis Workshop
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Fee: US $ 2950.00
Course Objectives
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 examples throughout the workshop. Also, to offer hands-on experience, attendees are encouraged to bring interesting well tests for analysis and discussion in the class. 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, geologists and geophysicists who are involved in the area of field development and exploitation.
Day 1
Petroleum Geology
– Main elements of petroleum reservoirs: hydrocarbon migration & traps.
– Depositional environment and impact on reservoir quality.
– Reservoir facies and heterogeneity.
Rock Properties
– Porosity types, permeability: relative, absolute, effective.
– Rock wettability and capillary pressure.
Fluid Properties
– Hydrocarbon classifications.
– Fluid behaviors; oil and gas physical properties.
– Fluid sampling and PVT analysis.
Reservoir Drive Mechanisms
– Equation of state, Darcy and continuity equation.
– Primary, secondary, and tertiary recovery schemes.
– Performance characteristics of different reservoir drive mechanisms.
Day 2
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)
Day 3
Wellbore storage: use of type curves and (class problem)
Draw-down testing
– Application and test analysis and equivalent time.
– Reservoir Limit Testing (case example – fracured basement).
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.
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) – several case examples.
Day 4
Well test interpretations
– Flow regime diagnoses using the pressure derivative.
– Conventional analysis.
– History matching of pressure data and selection of reservoir models- Case examples.
Demonstration of pressure recorders (by: Gord Regehr from Lonkar Services)
AEUB 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 #6).
– Simplified and L.I.T. techniques.
Day 5
Water injectivity tests
– Step rate and Fall-off tests (case examples).
– Hall Plot (class problem #8).
Naturally fractured reservoirs. Characterization of the reservoir using
– Pollard and Pirson Method (class example).
– Warren and Root Method (class example #7).
– Effect of NOP on fracture porosity and permeability.
Well test planning design
– Well 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 tests provided by attendees including several examples using a commercial software.
Closing comments and open discussion.