ROUTINE CORE ANALYSIS
  Routine Core Analysis involves the measurement of the most fundamental rock properties under overburden pressure. Porosity (storage capacity for reservoir fluids), permeability (reservoir flow capacity), saturation (fluid type and content), and gross lithology all provide critical information in deciding whether a wellbore will be economic.  
 
 
  • Core Handling and Stabilization  
  Wellsite core handling and stabilization are an extremely important part of a successful core analysis program. Whether your core is well cemented or unconsolidated and sleeved, our wellsite teams will make sure your core receives the most appropriate handling, stabilization and packaging to insure your core arrives in the laboratory in the best possible condition.
Wellsite stabilization of the core can be used to minimize damage and to preserve the structural integrity of the unconsolidated formation being cored. Core preservation is also necessary to minimize saturation and wettability alterations. 		 
  ° Epoxy Resination - The annulus between the core and the inner liner are filled with epoxy to provide a rigid cast around the core and minimize damage.
° Freezing / Chilling - The recovered core can be chilled or frozen using dry ice or portable freezers to maintain fluid saturations and provide additional core stabilization. 		 
     Service Available  
  » Pre-coring planning and support » Fluid Immersion    
  » Core Stabilization Methods » Wellsite Core Descriptio    
  » Core Stabilization Methods » Fluorosence Determination    
  » Epoxy Resination » Gas Detection    
  » Freezing » Chilling    
     
     Our services include :    
  » Surface core gamma
» Spectral core gamma
» Digital Core Photography
» Core photography
» Core slabbing and boxing
» Conventional core analysis
» Full-diameter core analysis
» Sidewall core analysis
» Fluid contents analysis		    
 
 
  • Spectral Core Gamma    
  Spectral Core Gamma measures the natural radioactivity of the core, which comes essentialy from the radioactive elements of the Thorium series, the Uranium-Radium series, and from the radioactive isotope K40 of Potassium. The capability of the gamma ray to determine lithology, and the fraction of clay in the reservoir, is impaired when Uranium and/or Thorium are present.
Composite and Spectral Core Gamma helps define lost core and depth correlation of core with down hole logs. Core gamma logs can also be used to pick formation tops.
  
 
 
  • Porosity
    
  Porosity can be determined at ambient or reservoir pressure conditions and is an indication of the storage capacity of the reservoir. Core porosities are used to calibrate logs and for reserves calculations. A number of techniques are employed for the measurement of porosity in consolidated rocks. Boyle's-law helium-expansion is a standard method for measuring either pore volume or grain volume. Bulk-volume measurements are determined by fluid displacement (Archimedes principle) or by calipering plug samples. With Boyle's law and bulk-volume data, bulk and grain densities can be determined by also weighting the sample.  
 
 
  • Permeability    
  Routine single-phase permeability measurements are fundamental to understanding fluid flow in porous media. Darcy's law is the empirical expression used to explain the relationship among the variable involved in the flow of fluids through rocks. Integration of permeability data from core, wireline logging, and pressure transient yield the best of reservoir permeability.
Permeability is determined in both the horizontal and vertical directions. Engineers can use horizontal permeability data to define flow capacity, permeability distribution and profile. Vertical permeability is used to define coring probability and gravity drainage potential.
Problem in permeability heterogeneity may be handled by using minipermeameter. High density minipermeameter data allow identification of permeability contrast not recognized using conventional data. Profiles of permeability commonly allow identification of reservoir flow units that remain unresolved by core plug sampling. 		 
   
 
 
  • Fluid Saturation    
  Fluid Saturations (oil and water) can be determined by retort distillation or by Dean Stark distillation, which help define the presence of hydrocarbons (net pay and contacts) and type of hydrocarbon that may be produced.  
 
 
  • Photography    
  We provide digital and non digital photography for additional documentation. Color/ultraviolet digital photography provides a permanent record of the cored interval including hydrocarbon stained intervals.  
 
 
  • Whole Core Imaging    
  Core data and images are of prime importance in defining fracture and bedding plane features, which are critical to the understanding of depositional environments, facies and tectonic history. Also important is the orientation of the different features. Often, orientation is obtained by correlating core with borehole images; however, consistency and accuracy is sometimes difficult. Borehole images give accurate measurements of the geological features, but are not usually analyzed in as fine a detail as core. Obviously, borehole image data can be more confidently interpreted with the information available from core imaging.  
       
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