Case Studies and Partial Client List 
        We have extensive experience in the Rocky Mountain region as well as Texas, Alaska, North Africa, Brazil, Iraq and other locations around the globe.  Our client base is likewise varied with mixture of small producers, large international companies and both private and public research organizations. 
        1. Partial Listing of Areas & Formations Worked 
         Shales 
        
         
          - Bakken Shale, ND
 
           
          - Baxter Shale, WY
 
           
          - Bossier Shale, LA
 
           
          - Cody Shale, WY
 
           
          - Eagle Ford Shale, TX
 
           
           - Gothic Shale, UT
 
           
          - Mowry Shale, WY
 
           
          - Tuscaloosa Marine Shale, LA
 
           
          - Wolfcamp Shale, TX
 
           
          - Woodford Shale, OK
 
           
           
           Carbonates 
        
           - Abiod Limestone, Tunisia
 
           
          - Aneth field, UT
 
           
          - Austin Chalk, TX
 
           
          - Buda Limestone, TX
 
           
          - Ellenberger, Permian basin, TX
 
           
           - Haynesville Limestone, TX, LA
 
           
         - Kurdistan and Iraq
 
           
         - Lisburne Limestone, AK
 
           
          - Niobrara Formation, WY, CO, NM
 
           
          - North Sea Chalk, England
 
         
         Fluvial/non-marine 
        
          - Abo Formation, NM
 
           
          - Alluvial fan, fluvial, and playa strata, Morocco
 
           
           - Cedar Mountain Formation, UT
 
           
          - Mesaverde Group, CO, WY, NM
 
           
          - Nubian Sandstone, Libya
 
           
          - Shattuck Member of the Queen Formation, NM
 
           
          - Two Medicine Formation, MT
 
           
          - Wasatch Formation, CO
 
           
          
         Tight Gas Sands 
        
         - Dakota Sandstone, CO, NM
 
          
         - Frontier Formation, WY
 
           
          - Mesaverde Formation, CO, NM
 
           
                
         
        
         Coal bed Methane 
        
          -           Raton basin, CO, NM
 
           
          - San Juan basin, CO, NM
 
         
         CO2 Sequestration 
        
          
          - Aneth field, UT
 
           
          - Permian basin, TX, NM
 
           
          - San Juan basin, CO, NM
 
           
          - Tensleep Formation, WY
 
           
          
         
           
         Geothermal  
        
         Other  
        
        - Altamont-Bluebell, Green River and Wasatch formations, UT
 
           
          - Bone Spring Sandstone, Delaware Basin, TX, NM
 
           
          - Cedar Mountain Formation, UT
 
           
          - Dakota Sandstone, San Ysidro, NM
 
           
          - Homestake Gold Mine, SD
 
           
          - Monterey Formation, CA
 
           
          - Nubian Sandstone, southern Libya
 
           
          - Paleozoic sandstones of southern Algeria
 
           
          - Spraberry, Midland basin, TX
 
           
          - Tensleep Sandstone, WY
 
           
         
         
        2. Partial Listing of Clients and Research Affiliates
        
          - Anschutz Exploration Corporation
 
           
          - Chesapeake Energy Corporation
 
           
          - ConocoPhillips
 
           
          - Davis Energy
 
           
          - Devon Energy Corporation
 
           
          - EnCana Corporation
 
           
           - Enhanced Oil Recovery Institute, University of Wyoming
 
           
          - Enterprise Tunisienne d'Activites Petrolieres
 
           - EOG Resources Incorporated
 
           
          - ExxonMobil Corporation
 
           
          - FracGeo LLC
 
           
          - Gulf Keystone Petroleum International LTD
      
          - Harvey E. Yates Company (HEYCO)
 
           
          - High Mount Exploration and Production LLC
 
          - Marathon Oil Corporation
        
           
          - Nadel and Gussman LLC
 
           
          - Occidental Petroleum Corporation
 
           
          - Pemex, Petroleos Mexicanos
 
           
          - Petroleum Professional Development Center, Midland College, Texas
 
           
          - Pioneer Natural Resources Company 
 
           
          - Prism Seismic Incorporated
 
           
          - Rock Deformation Research Ltd., University Leeds, England
 
           
          - Samson Resources Company
 
           
          - Sandia National Laboratories
 
           
          - Sonatrach Petroleum Corporation
 
           
          - Southwestern Energy Company
 
           
          - United States Department of Energy
 
           
          - Yates Petroleum Corporation
 
           
         
        3. Sample Reports and Publications
         We have written numerous proprietary core and outcrop reports.   Please find below PDFs of public-domain reports on: 
         Raton Basin:  
        RatonbasinSAND2004_4859.pdf 
        San Juan Basin: 
          SanJuanbasinSAND2001-0054.pdf 
         CO2 Sequestration Test in the Permian Basin: 
          WestPearlQueen2006to2008SAND2008-4992.pdf 
          WestPearlQueento2006SAND2008-3111.pdf 
         Fractures over Mobile Salt: 
            SaltValleyAnticlineSAND2001-3517.pdf 
        Multiwell Experiment Project Reports:   
          Core Based Stress Measurements SAND932239.pdf    
          Multi-Site Project Seismic Verification SAND937039.pdf    
          Multiwell Experiment Core Analysis SAND890710.pdf    
          Multiwell Experiment Final Report 1 SAND870327.pdf    
          Multiwell Experiment Final Report 2 SAND881008.pdf  
            Multiwell Experiment Final Report 3 SAND883284.pdf             
            Multiwell Experiment Final Report 4 SAND892612-1.pdf   
            Multiwell Experiment Final Report 4-2 SAND892612-2.pdf    
            Multiwell Experiment Finding and Exploiting Fractured Reservoirs  
        SAND931342.pdf  
        Characterization of Natural  Fractures in Mesaverde Core from the Multiwell Experiment SAND 88-1800.pdf  
        This report lists and  characterizes 1900 natural fractures found in 4200 feet of 4-inch  diameter Mesaverde core, much of it oriented, from the MWX site in the Piceance  basin of northwestern Colorado. The different types of fractures are  analyzed and the data synthesized to explain the fracture origins, the tectonic  history recorded by the fractures, and the reservoir plumbing system that fractures  create. A second dimension characterizing the spacing of these  fractures from deviated core taken from a slant/horizontal hole at this  site is described in Lorenz, J.C., and Hill, R.E., 1994, Subsurface  fracture spacing: Comparison of inferences from slant/horizontal and vertical  cores: SPE Formation Evaluation, v. 9, p. 66-72. 
Teapot Dome and Spraberry Formation:  
        Papers published in the American Association of Petroleum Geologists Bulletin on fractures at Teapot Dome (Wyoming) and in the Spraberry Formation (Midland basin, Texas) are provided as locked PDFs courtesy of AAPG.  Additional publications are available through the AAPG at www.aapg.org. 
 The Teapot Dome Fracture Project data are  utilized as the basic fracture database in fracture modeling classes. 
Coring-Induced Fractures:  
  Recognition and Use of Induced  Fractures, and Other Features in Core Produced by the Coring Process SAND 95-1482C.pdf  
  
  This report lists and  describes several types of induced fractures and artifacts,created  by the coring/drilling process, providing a basis for separating induced from  natural fractures in core. The described structures include petal,  centerline, scribe-knife, torque, and saddle fractures, as well as natural  fractures in horizontal core modified by the coring process. 
Department of Energy Reports:  
  Many of our publications with the Department of Energy are available through the DOE's Information Bridge website at www.osti.gov.  This site provides free public access to all of the DOE's Scientific and Technical publications, search by author, title or area of interest.         
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        Lorenz studying fractured limestone in the Ahnet basin of southern Algeria. 
                   Fractured Tensleep sandstones in anticlines are some of the most important reservoirs in Wyoming: we have finished a study of these units for the Enhanced Oil Recovery Institute with the University of Wyoming. 
           
          We have documented the interplay between faults and fractures in the San Juan basin of New Mexico. 
                   Extension fracture with plumose structure in the Raton basin, Colorado and New Mexico, part of an extensive Lorenz and Cooper et al. (2004) Sandia National Laboratories Technical Report and the 2021 paper "Natural Fractures and their relationship to structure, stress, and permeability in the Raton Basin; The Mountain Geologist, RMAG, v.58, n.4, p.375-410. 
         
            
         
      Well developed petal and centerline fractures (Lorenz et al., 1990) in the Spraberry Formation of the Midland basin, Texas (Lorenz et al., 2002).  |