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 Advanced Well Test Analysis and Production Log Interpretation (E6110) QR Code

Advanced Well Test Analysis and Production Log Interpretation

Overview:

Introduction:

This course will stress the practical application of modern techniques in well test analysis, with a special emphasis on the pressure derivative. Various pressure analysis techniques will be used to analyze flow tests, buildup tests with or without phase redistribution, multi-rate tests, interference tests, and pulse tests. Interpretation of pressure tests under multiphase flow conditions, hydraulically fractured wells, naturally fractured reservoirs, slanted wells, and horizontal wells will be discussed in great detail.

Course Objectives:

At the end of this course the participants will be able to:

  • Introduce to the TDS technique, which is an alternative option to type-curve matching technique, convolution, and regression analysis.
  • Interpret pressure transient tests
  • Apply the knowledge and skills gained to their job assignments upon course completion.
  • Illustrate by several daily Excel-based exercises and workshops.

Targeted Audience:

  • Petroleum Engineers who want to understand well testing principles and want to apply advanced modern interpretation techniques to analyze pressure transient tests.

Course Outlines:

Unit 1: Application of Pressure and Derivative to Drawdown and Buildup Tests:

  • Review of fundamental concepts of well testing and measurement techniques (Video).
  • Pressure-based analysis of flow and buildup tests.
  • Derivative-based analysis of flow and buildup tests, TDS technique.
  • Determining Average reservoir pressure.
  • Drainage area and pore volume of bounded systems, oil in place.

Unit 2: Hydraulically Fractured Wells and Gas Well Testing:

  • Practical aspects of fracturing and acidizing (Video).
  • Uniform-flux and infinite-conductivity models of hydraulic fractures.
  • Finite-conductivity: linear, bilinear, and elliptical flow.
  • The geometry of inclined hydraulic fractures.
  • Interpreting gas well tests using pressure and pseudo-pressure derivative.

Unit 3: Naturally Fractured Reservoirs and Carbonates:

  • Evaluation of carbonate reservoirs (Video).
  • Indicators and types of NFR.
  • Pseudo-steady state and unsteady state matrix flow models.
  • Storability and Porosity Partitioning coefficient.
  • Fracture porosity from good logs and well test analysis.
  • Interpretation of interference and pulse tests, pressure derivative.

Unit 4: Multiphase Flow, Multirate Tests, and Partially Perforated Wells:

  • Role of fluid properties, Perrine Permeability.
  • Dynamic Reservoir Testing (Video).
  • A conventional and modern interpretation of multi-rate tests.
  • Applications of TDS, convolution, and deconvolution techniques.
  • Partially completed/penetrated/perforated wells.
  • Vertical permeability from spherical flow, MDT.

Unit 5: Slanted and Horizontal Wells:

  • Effect of slant on pressure-response.
  • Determining the angle of inclination of the slanted well and partial penetration/perforation skin.
  • Overview of horizontal well completions and performance (Video).
  • Flow regimes and analytical solutions.
  • Applications of pressure derivative to calculate directional permeability values.
  • Pressure analysis of hydraulically fractured horizontal wells.

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