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PET 504E - Advanced Well Test Analysis

Course Objectives

Pressure transient formation and well testing is an important tool used in the industry to obtain useful information about the well and the reservoir system and hence construct a well/reservoir model which is crucial to reservoir management and field-development planning. In recent years, improvements in measurements and computer technologies have led to the developments of new pressure transient test types, complex well/reservoir interpretation models, and analysis methods. The main objectives of this course are to acquaint the students with the basic methodologies to be considered in the design, interpretation and analysis of pressure transient tests, derivations of the basic flow equations used, and the conventional and modern analysis methods.

Course Description

Fundamentals of well testing and analysis; Injection/falloff, drawdown/buildup tests; Derivations of flow equations describing unsteady flow of fluids (single, multi-phase fluid flow) in porous media; Solutions of diffusivity equations with different initial and boundary conditions; Interference testing; Modelling of wellbore storage and skin effects; Conventional analysis techniques (manual type-curve matching and straight line methods); Modern analysis techniques (pressure-derivative and pressure-integral methods, computer aided automated type-curve matching); Superposition in space and time (modelling interference effects between wells, boundary and variable flow rate effects); Flow regimes observed in vertical wells producing in infinite and bounded homogeneous systems; Convolution and Deconvolution; Well test analysis in gas wells; Drill stem testing (DST); An overview of pressure transient analyses in complex well/reservoir systems (horizontal wells, naturally fractured reservoirs).

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Yıldıray Palabıyık
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