Gaseous Static Liquid Columns | Dr. Anand Nagoo | CrowdField O&G Expert Series - Webinar #8

This session features Dr. Anand S. Nagoo presenting his work on static gaseous liquid columns in artificial lift systems and the development of the digital fluid level capability using advanced transient multiphase flow simulation.

Dr. Nagoo explains why conventional petroleum engineering correlations consistently underestimate bottomhole pressures, which leads to a systematic underestimation of the well's production potential. He compares these traditional approaches with high fidelity simulation methods that account for variable pressure gradients, rapid gas evolution along the column, and modern well configurations.

Key topics include:
✅ The development of the digital fluid level capability using transient multiphase flow simulation and its impact on production optimization
✅ The repeated overestimation of averaged column gas volume fraction by conventional correlations and its effect on bottomhole pressure and producing potential
✅ The need to account for gas evolution profiles and variable pressure gradients rather than constant gradient assumptions
✅ A live tabletop experiment demonstrating multiphase mixing, bubble rise velocity, recirculating structures, and the disproving of liquid stacking
✅ The comparison between Turner, Coleman, and the Nagoo model as full range or limited range correlations for critical gas velocity

Presented by Dr. Anand S. Nagoo, President of Nagoo & Associates LLC
Hosted by Alan Mourgues, Founder of CrowdField

🚫 Correction from Dr. Nagoo:
In the video, the word ‘overestimating’ is used to mean overestimating the well drawdown, or equivalently, underestimating its FBHP. This is what happens when there is a systematic overestimation of the average gas volume fraction in the liquid column. This means that the well’s producing potential is systematically underestimated and you actually have more producing potential than what has been incorrectly calculated. So there is lots of oil left in the ground.

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