Omar Ishteiwy

Senior Reservoir and Completions Engineer- Conventionals

[email protected]

Omar Ishteiwy is a Senior Reservoir and Completions Engineer at ResFrac, where he leads the development and application of modeling workflows for conventional reservoirs and supports business development for conventional applications. He has two decades of experience in fracturing and stimulation across conventional, transitional, and unconventional reservoirs, both onshore and offshore.

Prior to joining ResFrac, he held engineering and technical leadership roles at Schlumberger and bp. His experience spans exploration, appraisal, and development programs across the Middle East, North Africa, and the North Sea, including tight-gas and gas-condensate developments and complex offshore stimulation campaigns. His technical background includes proppant and acid fracturing, matrix stimulation, multistage completions, diagnostic injection testing, fracture modeling, and production optimization.

He has been responsible for stimulation programs from completion evaluation and treatment design through execution and performance assessment. His work has included establishing stimulation bases of design, defining technical scopes and service requirements, and building engineering capability across multidisciplinary teams. These responsibilities have required detailed technical knowledge alongside practical judgment about operational constraints, cost, and reservoir development objectives.

He holds a Bachelor of Science in Chemical Engineering from the University of Colorado Boulder and a Master of Science in Chemical Engineering from Colorado School of Mines in Golden, Colorado. He has authored and co-authored technical papers on fracture design, diagnostics, completion systems, and stimulation performance.

Based in Colorado, he enjoys hiking, camping, and traveling, often combining the three to explore new places.

Omar's posts

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The influence of well configuration on water loss in Enhanced Geothermal Systems

Recently, ‘water loss’ has been a hot topic of discussion for EGS. Fervo reported that they have been producing only 70% of the fluid volumes that they have been injecting at their Project Red. The FORGE project reported a roughly 10% water loss rate. Because projects will have finite water rights, these results have led to concern that growth of EGS will be limited by excessive water consumption. This is a valid concern, and water availability is a legitimate factor in site-selection and project engineering. However, I believe that the problem has been overstated.

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2026 ResFrac Annual Symposium Recap

On June 25, 2026, we got the ResFrac community together both in-person at the ExxonMobil campus in Spring, Texas, and virtually around the globe for our Annual Symposium. With our community growing as fast as it is, the energy in the room was absolutely buzzing. We had a jam-packed day of operator case studies, deep-dive technical sessions, and some incredible geomechanical insights from industry legends.

ResApps FracTest interface showing a Stress interpretation section with an Auto-interpret button and contact options, next to a Stress Diagnostic Chart.

FracTest – An Online Tool for DFIT Interpretation

This week, we are releasing FracTest, a web-based application for interpretation of diagnostic fracture injection tests (DFITs). FracTest is available at resapps.resfrac.com, alongside our other two ResApps, StageOpt and IntTest. DFITs are small-volume fracture injection tests used to estimate stress, pore pressure, and permeability. These quantities form the foundation of the fracture and reservoir engineering work that we do in ResFrac, and so we view DFIT interpretation as one of the most important parts of our workflow.

Omar Ishteiwy

Senior Reservoir and Completions Engineer- Conventionals

Omar's posts

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