Until recently, a high level of expertise and knowledge of the principles and practice of NMR has been needed to perform NMR core analysis. Consequently, NMR core analysis has been confined to a relatively small group of Special Core Analysis Laboratories. Now, a partnership between Oxford Instruments and Green Imaging Technologies brings new hardware and software, with improved performance, to enable any core analysis laboratory to generate the petrophysics values that the industry needs without the requirement...
Down-hole NMR tools are routinely run during the oil and gas exploration process and provide valuable information to the reservoir engineers. The tools measure T2 distribution as a function of depth. T2 can be directly related to pore size and with the correct T2 cut-off can allow the determination of bound fluid versus free fluid in the reserve. These values can then be used to estimate recoverable reserves.
Basic petrophysical parameters (porosity, BVI, FFI, CBW and T2 cutoff) are calculated automatically by the LithoMetrix software installed on every GeoSpec from two measurements – one on a cleaned and saturated core plug, the other on the same plug after it has been centrifuged to irreducible water saturation. Each time, the LithoMetrix software generates a pore size distribution, and from these two pore size distributions automatically calculates the basic parameters. The integrated area under the...
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