| Identification and evaluation of well integrity and causes of failure of well integrity barriers (A review) R Kiran, C Teodoriu, Y Dadmohammadi, R Nygaard, D Wood, M Mokhtari, ... Journal of Natural Gas Science and Engineering 45, 511-526, 2017 | 325 | 2017 |
| Brittle–ductile transition, shear failure and leakage in shales and mudrocks R Nygård, M Gutierrez, RK Bratli, K Høeg Marine and Petroleum Geology 23 (2), 201-212, 2006 | 313 | 2006 |
| Stress-dependent permeability of a de-mineralised fracture in shale M Gutierrez, LE Øino, R Nygaard Marine and Petroleum Geology 17 (8), 895-907, 2000 | 277 | 2000 |
| Review of lost circulation materials and treatments with an updated classification M Alsaba, R Nygaard, G Hareland, O Contreras AADE National Technical Conference and Exhibition, Houston, TX, 1-9, 2014 | 185 | 2014 |
| Evaluation of a nanocomposite hydrogel for water shut‐off in enhanced oil recovery applications: Design, synthesis, and characterization P Tongwa, R Nygaard, B Bai Journal of Applied Polymer Science 128 (1), 787-794, 2013 | 137 | 2013 |
| Cutting efficiency of a single PDC cutter on hard rock G Hareland, R Nygaard, W Yan, JL Wise Journal of Canadian Petroleum Technology 48 (06), 60-65, 2009 | 135 | 2009 |
| Compaction behavior of argillaceous sediments as function of diagenesis R Nygård, M Gutierrez, R Gautam, K Høeg Marine and Petroleum Geology 21 (3), 349-362, 2004 | 135 | 2004 |
| Application of in-house prepared nanoparticles as filtration control additive to reduce formation damage O Contreras, G Hareland, M Husein, R Nygaard, M Alsaba SPE International Conference and Exhibition on Formation Damage Control …, 2014 | 134 | 2014 |
| Updated criterion to select particle size distribution of lost circulation materials for an effective fracture sealing M Alsaba, MF Al Dushaishi, R Nygaard, OM Nes, A Saasen Journal of Petroleum Science and Engineering 149, 641-648, 2017 | 112 | 2017 |
| Effect of dynamic loading on wellbore leakage for the wabamun area CO2-sequestration project R Nygaard, S Salehi, B Weideman, RG Lavoie Journal of Canadian Petroleum Technology 53 (01), 69-82, 2014 | 111 | 2014 |
| Numerical simulations of wellbore stability in under-balanced-drilling wells S Salehi, G Hareland, R Nygaard Journal of Petroleum Science and Engineering 72 (3-4), 229-235, 2010 | 104 | 2010 |
| Real-time drill bit wear prediction by combining rock energy and drilling strength concepts B Rashidi, G Hareland, R Nygaard Abu Dhabi International Petroleum Exhibition and Conference, SPE-117109-MS, 2008 | 102 | 2008 |
| Wellbore strengthening-nano-particle drilling fluid experimental design using hydraulic fracture apparatus CO Nwaoji, G Hareland, M Husein, R Nygaard, MF Zakaria SPE/IADC Drilling Conference and Exhibition, SPE-163434-MS, 2013 | 100 | 2013 |
| Lost circulation materials capability of sealing wide fractures M Alsaba, R Nygaard, A Saasen, OM Nes SPE deepwater drilling and completions conference, D021S009R003, 2014 | 99 | 2014 |
| Wellbore strengthening in sandstones by means of nanoparticle-based drilling fluids O Contreras, G Hareland, M Husein, R Nygaard, M Alsaba SPE deepwater drilling and completions conference, D011S004R001, 2014 | 98 | 2014 |
| Numerical modeling of induced fracture propagation: a novel approach for lost circulation materials (LCM) design in borehole strengthening applications of deep offshore drilling S Salehi, R Nygaard SPE Annual Technical Conference and Exhibition?, SPE-135155-MS, 2012 | 94 | 2012 |
| Comparison of rock failure criteria in predicting borehole shear failure R Rahimi, R Nygaard International Journal of Rock Mechanics and Mining Sciences 79, 29-40, 2015 | 89 | 2015 |
| Calculating unconfined rock strength from drilling data G Hareland, R Nygaard ARMA Canada-US Rock Mechanics Symposium, ARMA-07-214, 2007 | 74 | 2007 |
| Laboratory evaluation of sealing wide fractures using conventional lost circulation materials M Alsaba, R Nygaard, A Saasen, OM Nes SPE Annual Technical Conference and Exhibition?, SPE-170576-MS, 2014 | 71 | 2014 |
| Experimental investigation on wellbore strengthening in shales by means of nanoparticle-based drilling fluids O Contreras, G Hareland, M Husein, R Nygaard, M Alsaba SPE Annual Technical Conference and Exhibition?, SPE-170589-MS, 2014 | 66 | 2014 |
Geir HarelandOklahoma State UniversityVerified email at okstate.edu