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Related Concept Videos

Scaling01:26

Scaling

712
In designing and analyzing filters, resonant circuits, or circuit analysis at large, working with standard element values like 1 ohm, 1 henry, or 1 farad can be convenient before scaling these values to more realistic figures. This approach is widely utilized by not employing realistic element values in numerous examples and problems; it simplifies mastering circuit analysis through convenient component values. The complexity of calculations is thereby reduced, with the understanding that...
712

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Characterization Of Multi-layered Fish Scales Atractosteus spatula Using Nanoindentation, X-ray CT, FTIR, and SEM
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Determining multiple length scales in rocks

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  • 1Schlumberger-Doll Research, Ridgefield, Connecticut 06877, USA. song@ridgefield.sdr.slb.com

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|July 26, 2000
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Summary
This summary is machine-generated.

This study introduces a new, non-destructive nuclear magnetic resonance technique to analyze pore structures in Middle Eastern carbonate rocks. The method reveals key pore-size distributions crucial for understanding oil reservoir properties and improving oil recovery.

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Area of Science:

  • Geoscience
  • Petroleum Engineering
  • Materials Science

Background:

  • Middle Eastern carbonate reservoirs hold approximately half of the world's oil reserves.
  • Sedimentation and diagenesis create complex pore structures (microporous grains, varied pore sizes) in carbonate rocks.
  • Heterogeneous pore distribution and connectivity complicate the determination of pore-length scales controlling fluid transport.

Purpose of the Study:

  • To present a novel, non-destructive bulk-measurement technique for characterizing pore structures in carbonate rocks.
  • To extract multiple characteristic length scales that influence fluid transport properties.
  • To provide critical information for estimating capillary-bound water and enhancing oil production.

Main Methods:

  • Utilized nuclear magnetic resonance (NMR) to probe the pore space.
  • Exploited spatially varying magnetic fields within the pore structure as a 'fingerprint' of pore architecture.
  • Applied the technique to carbonate rock samples from the Middle East.

Main Results:

  • Identified three primary pore-length scales, ranging from 1 to 100 micrometers, in the studied carbonate rocks.
  • Determined that the pores exhibit good connectivity and a spatially mixed distribution.
  • Demonstrated the technique's capability to extract detailed pore structure information non-destructively.

Conclusions:

  • The developed NMR technique effectively characterizes complex pore networks in carbonate reservoirs.
  • Understanding pore-length scales and connectivity is vital for accurate estimation of capillary-bound water and optimizing oil recovery.
  • The method shows potential for application in studying shaly sand reservoirs and cellular structures.