Brent Thomas

Sampling and Characterization of Difficult Fluids

3:44 Hours
This intermediate course explores the challenges of sampling and characterizing volatile hydrocarbon fluids in low permeability porous media. It covers fundamental phase behavior concepts to identify and resolve difficulties encountered in both oil and gas condensate reservoirs. The course emphasizes the importance of understanding fluid behavior in situ, including issues like solids precipitation and phase separation during sampling. It also addresses both bottomhole and surface sampling techniques, highlighting the advantages and limitations of each. With a focus on unconventional reservoirs, the course aims to improve fluid characterization accuracy, impacting reservoir evaluation and asset management decisions.

Who Should Take This Course
• Reservoir engineers and production specialists
• Engineers involved in fluid sampling and analysis
• Professionals working with unconventional reservoirs

What You Will Learn
• Optimizing surface sampling techniques
• When and how to use bottomhole sampling
• Fundamental phase behavior of difficult fluids
• Challenges in unconventional reservoir fluid characterization

Why This Course Works
• Enhance reservoir and asset evaluation
• Improve in situ fluid characterization accuracy
• Address solids precipitation and phase separation
• Support better production and operational decisions

1.01 Introduction (11 min.)
1.02 Unconventional Production (11 min.)
1.03 Sampling – What Are We Really Doing? (12 min.)
1.04 The Challenge of Fluid Characterization (14 min.)
1.05 Radial Inflow Pressure Profile (7 min.)

2.01 Corrections to Best Represent Fluid In Situ (17 min.)
2.02 GOR vs Flowrate – A Case Study (15 min.)
2.03 GOR – C20+ and Bubble Point (13 min.)
2.04 Algorithm for Correction (8 min.)

3.01 Introducing Dew Point (19 min.)
3.02 Dew Point Continued (20 min.)
3.03 Field Examples (13 min.)
3.04 Oil Presenting as a Dew Point Fluid (24 min.)
3.05 More Examples and Closing (17 min.)

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