| Bioassay for estimating the biogenic methane-generating potential of coal samples EJP Jones, MA Voytek, PD Warwick, MD Corum, A Cohn, JE Bunnell, ... International Journal of Coal Geology 76 (1-2), 138-150, 2008 | 186 | 2008 |
| Organic intermediates in the anaerobic biodegradation of coal to methane under laboratory conditions WH Orem, MA Voytek, EJ Jones, HE Lerch, AL Bates, MD Corum, ... Organic geochemistry 41 (9), 997-1000, 2010 | 168 | 2010 |
| Biogenic origin of coalbed gas in the northern Gulf of Mexico Coastal Plain, USA PD Warwick, FC Breland Jr, PC Hackley International Journal of Coal Geology 76 (1-2), 119-137, 2008 | 111 | 2008 |
| Relationship of Fluviodeltaic Facies to Coal Deposition in the Lower Fort Union Formation (Palaeocene), South‐Western North Dakota ES Belt, RM Flores, PD Warwick, KM Conway, KR Johnson, ... Sedimentology of Coal and Coal‐Bearing Sequences, 177-195, 1985 | 80 | 1985 |
| Coupled hydrology and biogeochemistry of Paleocene–Eocene coal beds, northern Gulf of Mexico JC McIntosh, PD Warwick, AM Martini, SG Osborn Bulletin 122 (7-8), 1248-1264, 2010 | 79 | 2010 |
| Coal bed sequestration of carbon dioxide R Stanton, R Flores, PD Warwick, H Gluskoter, GD Stricker 1st National Conference on Carbon Sequestration, Washington, USA, 14-17, 2001 | 77 | 2001 |
| National assessment of geologic carbon dioxide storage resources: methodology implementation MS Blondes, ST Brennan, MD Merrill, ML Buursink, PD Warwick, ... Open-File Report, 2013 | 68 | 2013 |
| Pore characteristics of Wilcox Group Coal, US Gulf Coast Region: Implications for the occurrence of coalbed gas SM Swanson, MD Mastalerz, MA Engle, BJ Valentine, PD Warwick, ... International Journal of Coal Geology 139, 80-94, 2015 | 58 | 2015 |
| The US Geological Survey's national coal resource assessment: the results LF Ruppert, MA Kirschbaum, PD Warwick, RM Flores, RH Affolter, ... International Journal of Coal Geology 50 (1-4), 247-274, 2002 | 54 | 2002 |
| Chemical analyses in the world coal quality inventory SJ Tewalt, HE Belkin, JR SanFilipo, MD Merrill, CA Palmer, PD Warwick, ... Open-File Report, 2010 | 49 | 2010 |
| Depositional models for two Tertiary coal-bearing sequences in the Powder River Basin, Wyoming, USA PD Warwick, RW Stanton Journal of the Geological Society 145 (4), 613-620, 1988 | 47 | 1988 |
| Using Ground and Intact Coal Samples To Evaluate Hydrocarbon Fate during Supercritical CO2 Injection into Coal Beds: Effects of Particle Size and Coal Moisture JJ Kolak, PC Hackley, LF Ruppert, PD Warwick, RC Burruss Energy & Fuels 29 (8), 5187-5203, 2015 | 46 | 2015 |
| Organic petrology and coalbed gas content, Wilcox Group (Paleocene–Eocene), northern Louisiana PC Hackley, PD Warwick, FC Breland Jr International Journal of Coal Geology 71 (1), 54-71, 2007 | 45 | 2007 |
| Environmental drivers of differences in microbial community structure in crude oil reservoirs across a methanogenic gradient JL Shelton, DM Akob, JC McIntosh, N Fierer, JR Spear, PD Warwick, ... Frontiers in Microbiology 7, 1535, 2016 | 41 | 2016 |
| Petrology, mineralogy and geochemistry of mined coals, western Venezuela PC Hackley, PD Warwick, E González International Journal of Coal Geology 63 (1-2), 68-97, 2005 | 39 | 2005 |
| Unconventional energy resources: 2017 review American Association of Petroleum Geologists, Energy Minerals Division fran ... Natural Resources Research 28 (4), 1661-1751, 2019 | 38* | 2019 |
| Assessment of coal mine methane (CMM) and abandoned mine methane (AMM) resource potential of longwall mine panels: Example from Northern Appalachian Basin, USA CÖ Karacan, PD Warwick International Journal of Coal Geology 208, 37-53, 2019 | 38 | 2019 |
| Petrography and geochemistry of selected lignite beds in the Gibbons Creek mine (Manning Formation, Jackson Group, Paleocene) of east-central Texas PD Warwick, SS Crowley, LF Ruppert, J Pontolillo International journal of coal geology 34 (3-4), 307-326, 1997 | 37 | 1997 |
| Determining CO2 storage potential during miscible CO2 enhanced oil recovery: noble gas and stable isotope tracers JL Shelton, JC McIntosh, AG Hunt, TL Beebe, AD Parker, PD Warwick, ... International Journal of Greenhouse Gas Control 51, 239-253, 2016 | 34 | 2016 |
| The origin and distribution of HAPs elements in relation to maceral composition of the A1 lignite bed (Paleocene, Calvert Bluff Formation, Wilcox Group), Calvert Mine area … SS Crowley, PD Warwick, LF Ruppert, J Pontolillo International journal of coal geology 34 (3-4), 327-343, 1997 | 34 | 1997 |
