PET 504E - Advanced Well Test Analysis

Course Objectives

1. Basic concepts, equations, and methodologies used in designing, interpreting and analyzing pressure transient formation and well tests.
2. Modern interpretation and analysis tools such as pressure-derivative, deconvolution, and automated type-curve matching methods for analyzing test data
3. Analysis of pressure data from complex well and reservoir systems such as horizontal wells, slanted wells, hydraulically fractured wells, naturally fractured, and layered reservoirs.
4. Evaluation of uncertainties in identifying the appropriate interpretation model(s) and estimated parameters.

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).