Drilling: Shear Degradability of Granular Lost Circulation Materials

Speaker Ramy Mahrous
Global Technical Engineer M-I Swaco Ramy Mahrous: Is aGlobal Technical Services Engineer in M-I SWACO’s Drilling Solutions division based in Houston, Texas. Ramy has seven years experience in drilling fluids engineering and field applications. His work experience centered primarily in Middle East and then spread along the United States, India ...

Global Technical Engineer M-I Swaco



Ramy Mahrous: Is aGlobal Technical Services Engineer in M-I SWACO’s Drilling Solutions division based in Houston, Texas. Ramy has seven years experience in drilling fluids engineering and field applications. His work experience centered primarily in Middle East and then spread along the United States, India and Latin America. He has been involved in extreme HTHP drilling projects where high concentrations of H2S and ultra-high temperatures were encountered as challenges out in the field. Mr. Mahrous was born in Cairo, Egypt, and has a BSc in Mechanical Engineering / Hydraulics (Fluid Mechanics & Gas Dynamics).  Besides being an SPE member he’s a member in the American Society of Mechanical Engineers and the American Association of Drilling Engineers.

 

 

Publications if needed to be added:

R. Mahrous, M-I SWACO, a Schlumberger company; B.P. Montoto, Schlumberger; M. Sobrinho, M-I SWACO, a Schlumberger company; J. Thomaz Goncalves, Petrobras "A Significant MWD Tool Signal Strength Improvement: Another Advantage of Using a Treated Micronized Barite Drilling Fluid System" SPE ATCE 2012 San Antonio, Texas, USA, 8-10 October 2012.

R. Mahrous.M-I SWACO "Drilling Fluids Technology - An Impact Drilling Solution" SPE ATW: Drilling Meets Formation Evaluation, 12 -14 June

Fred Growcock, Occidental Oil and Gas Corp; Ramy Mahrous and Richard Flesher, M-I SWACO,"Shear Degradability of Granular Lost Circulation Materials'' AADE-12-FTCE-27 , April 15th 2012.

Keith Kiddy, Blake Brockerville and Ramy Mahrous, "SAFESURF WN S.ARAMCO", Oct. 2010 - M-I SWACO KSA Achievements.

R Mahrous, "Hazardous Chemicals Awareness", Aug.08 - SHELL- Nabors Drilling Safety Bulletin.

Barrie Esson, Andrew Kostulin and Ramy Mahrous, "H2S Scavengers new field testing procedures", Feb.08 - SHELL - M-I SWACO Records.

Ramy A., "Water Treatments", January 08 - RotarAct publications.

R.Mahrous, "Heat Exchanger enhancements", May 05 - 3RPS052005

Prof. SA, Prof. SS, Eng.RA, "Fluid Mechanics and Gas Dynamics", June 04 - Faculty of Engineering, Mechanical Dept.-Hydraulics Div.

Full Description
This presentation summarizes the results of a study undertaken to document and better understand the physical degradation experienced by lost circulation materials (LCMs) in a circulating drilling fluid during drilling operations. In this study, 15 conventional granular LCMs used to remediate and prevent lost circulation were subjected to shear degradation tests, and the effect of shear on the particle size distribution (PSD) was measured. Four chemical families of LCMs were studied: marble; carbon (graphite and petroleum coke); a tough, short-filament fiber; and pecan nut shells. All of these had aspect ratios of length/width/breadth ~1/1/1, hence were classified as granular.
 
The results indicate that, while the carbon-based products are more resistant than the marble-based products to shear degradation, neither one is particularly long-lasting, especially compared to the fibers and nut shells, which exhibited little or no change in their particle size distributions. An exception is a high-resiliency carbon-based LCM, which showed much greater resistance to shear degradation than the other carbon-based products, though slightly lower than the fiber and nut shell products. Both the carbon- and marble-based products exhibited greater resistance to shear degradation with decreasing particle size, and the trend appeared to be stronger for the carbon than for the marble product line. A fine-mesh marble exhibited unusually high sensitivity to shear, which was not consistent with that trend; this may not be surprising, though, considering that it is sourced differently than the other marble products and is ground in a manner that may make it more susceptible to fracturing. Neither the fiber nor the nut shell demonstrated a clear size dependence of shear resistance based on particle size.
Organizer Amy Timmons