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This five day course will teach participants how to understand the fundamental concepts of well test analysis and will help them become familiar with the recent advances in well test interpretation.
The methodology described during this course, which has become the standard of the industry, will present a systematic way of interpreting well tests and reconcile the various methods that have been developed over the years. Practical problem-solving sessions will be included during the course.
Well Test Interpretation Methodology
Participants will be introduced to the main concepts of well test analysis and to two historic approaches for interpreting well test data. Specific topics will include the concept of the interpretation model, as well as straight-line and pressure log-log analyses.Day 2
Evolution of Well Test Analysis Techniques
Day two will review of some common beliefs in well test analysis that have been proven to be incorrect yet keep being used and promoted. This day will go back to the original papers helping participants to understand the assumptions under which these methods were developed and why they may no longer be applicable.Day 3
Practical Use of Deconvolution
The use of deconvolution will be illustrated using examples of short and long duration tests. Examples will include DST’s with erroneous rates, which deconvolution can be used to correct. Another example will be data from permanent downhole pressure gauges in vertical and horizontal wells, where deconvolution shows compartmentalization and recharge from other layers, which could not be seen in the original data.Day 4
Well Test Analysis of Complex Reservoir Systems
On day three, complex geometries will be covered in regards to the well test pressure derivative by a non-standard transition between the main radial flow derivative stabilization and the late time boundary behavior. This transition will give access to quantitative information related to the complex geometry that is usually ignored in routine well test interpretation.Day 5
Well Test Analysis of Complex Fluid Systems
The last day will cover well test analysis of complex fluid systems. Well testing in gas-condensate and volatile oil reservoirs with flowing bottomhole pressure below the saturation pressure can be difficult to interpret due to multiphase flow in the reservoir. They can be analyzed using single-phase and two-phase pseudo-pressures, as well as two- or three-region radial-composite interpretation models. Analysis with 2-phase pseudo-pressures is required to correctly estimate the zero-rate wellbore skin effect and the non-Darcy coefficient.
Reservoir engineers, production engineers, and field personnel involved with the design and interpretation of well tests.
Participants should have a basic knowledge of transient well testing nomenclature.
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