Digital core

The increasing complexity of reservoir rocks and the development of tomographic techniques promoted a new type of sample investigation—the digital core analysis. High-resolution images of the rock s pores and mineral grains are obtained and processed, and the rock properties are evaluated by numerical simulation at the pore scale (Kalam, 2012). 

Clastic Rocks 44 2.7 The Digital Core—K Look into ... 

Pore space properties are important for the description and characterization of pore volume and fluid flow behaviour of reservoirs. Laboratory techniques (standard and special core analysis) deliver fundamental properties. Thin sec-timis and microscopic or scanning electron microscopic (SEM) investigations are used for description and computer-aided analysis. Sophisticated techniques result in digitized core images (Ams et al., 2005 Kayser et al., 2006) and the development of a virtual rock physics laboratory (Dvorkin et al., 2008). 

THE DIGITAL CORE—A LOOK INTO THE PORE SPACE... 

For the investigation of complex reservoir rocks, the development of digital core analysis techniques is a big step. Digital-scanned data from rock samples... 

Andersen, M.A., 2014. Digital core flow simulations accelerate evaluation of multiple recovery scenarios. World Oil 98, 50-56. June. 

For the practical implementation of the above mentioned facts, the portable electronic digital coercive force meter with self-contained power supply, attached converter and closed type magnetic core. Instrument error is 5 %. ... 

Bimetallic nanoparticles, either as alloys or as core-shell structures, exhibit unique electronic, optical and catalytic properties compared to pure metallic nanopartides [24]. Cu-Ag alloy nanoparticles were obtained through the simultaneous reduction of copper and silver ions again in aqueous starch matrix. The optical properties of these alloy nanopartides vary with their composition, which is seen from the digital photographs in Fig. 8. The formation of alloy was confirmed by single SP maxima which varied depending on the composition of the alloy. 

Currin, H. B., C. M. Hunin, L. Rivlin, and L. S. Tong, 1961, HYDNA—Digital Computer Program for Hydrodynamic Transients in a Pressure Tube Reactor or a Closed Channel Core, USAEC Rep. CYNA-77, Washington, DC. (6)... 

Lithium ferrite itself (x = 0.5) has a high Curie temperature and can be fabricated so as to give a square hysteresis loop satisfactory for digital-computer memory cores. In this application, the dielectric losses connected with the presence of mobile charge carriers can cause a dramatic loss in core quality. The mobile carriers may be introduced by... 

NMR sp troscopy measurements were made on samples extracted with MEK. Contribution of the core to the aromatic region has been neglected First digit= of PpClSt second digit= M of PIB C8=calix[8]arene... 

Data Reduction. The spectral data can be collected on-line and stored directly on magnetic tape under control of a PDP-8 digital computer 11). Alternatively, they can be collected on a magnetic core memory, then transferred in bulk fashion (Figure 14). The choice of method is dictated by the length of counting required and by the method of treatment of the data (i.e., simple X-Y plot or complete channel information). 

An NMR spectrometer capable of PFT measurements is a combination of a CW circuit such as found in conventional NMR spectrometers [1-5], a computer controllable pulse generator, and a small digital computer of core memory size 8-256 K. Fig. 2.34 outlines this experimental arrangement. 

The PFT NMR spectrum can then be recorded in analog or digital form by a plotter controlled by the computer. If the computer core memory allows, additional subroutines may be stored which automatically compute signal intensities and positions (in ppm values relative to some standard or in Hz) and outputs them to the printer. 

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