Hisham Nasr-El-Din
Dr. Hisham A. Nasr-El-Din is a Professor and Holder of the John Edgar Holt Endowed Chair in the Harold Vance Department of Petroleum Engineering at Texas A&M University. Previously, he worked for 15 years as Principal Professional and Team Leader of the Stimulation Research and Technology Team at Saudi Aramco. Before joining Saudi Aramco, he worked for four years as a staff research engineer with the Petroleum Recovery Institute in Calgary. He also worked as a research associate with the University of Saskatchewan, the University of Ottawa, and the University of Alberta, all in Canada. His research interests include well stimulation, formation damage, enhanced oil recovery, conformance control, interfacial properties, adsorption, rheology, cementing, drilling fluids, two-phase flow, and non-damaging fluid technologies. Nasr-El-Din has nearly twenty patents and has published and presented more than 575 technical papers. He has received numerous awards within Saudi Aramco for significant contributions in stimulation and treatment-fluid technologies and stimulation design, and for his work in training and mentoring. Nasr-El-Din holds a B.Sc. and M.Sc. degrees from Cairo University, Egypt and a Ph.D. degree from the University of Saskatchewan, Canada, all in Chemical Engineering. He serves on the Society of Petroleum Engineers (SPE) steering committees on stimulation and oilfield chemistry, is a review chairperson for the Society of Petroleum Engineers Journal (SPE J.), and is a technical editor for SPE Production & Operations (SPEPO) and SPE Development & Completion (SPEDC). He was invited to give keynote presentations in various SPE and NACE (National Association of Corrosion Engineers) conferences. He received the SPE Regional Technical Discipline Award for Production and Operations in 2006, was named a Distinguished SPE Member in 2007, and received SPE awards for Outstanding Associate Editor (SPE J.) and Outstanding Technical Editor (SPEPO) in 2008. In addition, he received the SPE Production and Operations Award and Outstanding Associate Editor Award (SPE J.) in 2009. He received the SPE “A Peer Apart” status in 2011 for reviewing more than 100 papers. Recently, he was named the 2013 recipient of the Distinguished Achievement Award for Petroleum Engineering Faculty.
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Papers by Hisham Nasr-El-Din
In this paper, the effect of iron precipitation in the acidizing operations is studied. HCl solutions (5 - 10 wt%) containing 5,000 to 10,000 ppm of Fe3+ were used for these experiments. The effect of varying acid concentration, initial core permeability, core length, temperature, and flow rate was studied. Coreflood experiments were conducted on 6 and 20 in. long Indiana limestone cores over a wide range of permeabilities and up to 300°F. In these experiments, 0.5 PV of acid solution was injected. The cores were scanned after treatments using a CT scanner and cut to better determine the location of iron deposition. The core effluent samples were analyzed for iron and calcium concentrations using ICP-OES.
Results showed a significant amount of iron precipitated on the injection face of the cores and the sides of wormholes, i.e. where the contact occurs between the acid and the rock, producing a minimal or no gain in the final permeability, which indicated severe formation damage. The damage increased with the increase of the amount of iron in solution. At higher temperatures and flow rates, the damage was significant. Core length didn't affect the degree of damage. This paper will discuss the results obtained and give recommendations on whether to use iron control agents in the field or not.
In this paper, the effect of iron precipitation in the acidizing operations is studied. HCl solutions (5 - 10 wt%) containing 5,000 to 10,000 ppm of Fe3+ were used for these experiments. The effect of varying acid concentration, initial core permeability, core length, temperature, and flow rate was studied. Coreflood experiments were conducted on 6 and 20 in. long Indiana limestone cores over a wide range of permeabilities and up to 300°F. In these experiments, 0.5 PV of acid solution was injected. The cores were scanned after treatments using a CT scanner and cut to better determine the location of iron deposition. The core effluent samples were analyzed for iron and calcium concentrations using ICP-OES.
Results showed a significant amount of iron precipitated on the injection face of the cores and the sides of wormholes, i.e. where the contact occurs between the acid and the rock, producing a minimal or no gain in the final permeability, which indicated severe formation damage. The damage increased with the increase of the amount of iron in solution. At higher temperatures and flow rates, the damage was significant. Core length didn't affect the degree of damage. This paper will discuss the results obtained and give recommendations on whether to use iron control agents in the field or not.