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Title: Exploratory characterization of a perfluoropolyether oil as a possible viscosity standard at deepwater production conditions of 533 K and 241 MPa

Journal Article · · International Journal of Thermophysics
 [1];  [2];  [3];  [3];  [3];  [4];  [5];  [5];  [5];  [3];  [6]
  1. National Energy Technology Lab. (NETL), Albany, OR (United States). Univ. of Pittsburgh, PA (United States)
  2. National Energy Technology Lab. (NETL), Albany, OR (United States); URS, Pittsburgh, PA (United States)
  3. National Energy Technology Lab. (NETL), Albany, OR (United States)
  4. Phasex Corporation, Lawrence, MA (United States)
  5. National Energy Technology Lab. (NETL), Albany, OR (United States); Virginia Commonwealth Univ., Richmond, VA (United States)
  6. National Energy Technology Lab. (NETL), Albany, OR (United States); Univ. of Pittsburgh, PA (United States)
+ Show Author Affiliations

DuPont’s perfluoropolyether oil Krytox® GPL 102 is a promising candidate for the high-temperature, high-pressure Deepwater viscosity standard (DVS). The preferred DVS is a thermally stable liquid that exhibits a viscosity of roughly 20 mPa ∙ s at 533 K and 241 MPa; a viscosity value representative of light oils found in ultra-deep formations beneath the deep waters of the Gulf of Mexico. Furthermore, a windowed rolling-ball viscometer designed by our team is used to determine the Krytox® GPL 102 viscosity at pressures to 245 MPa and temperatures of 311 K, 372 K, and 533 K. At 533 K and 243 MPa, the Krytox® GPL 102 viscosity is (27.2±1.3)mPa ∙ s. The rolling-ball viscometer viscosity results for Krytox® GPL 102 are correlated with an empirical 10-parameter surface fitting function that yields an MAPD of 3.9 %. A Couette rheometer is also used to measure the Krytox® GPL 102 viscosity, yielding a value of (26.2±1)mPa ∙ s at 533 K and 241 MPa. The results of our exploratory study suggest that Krytox® GPL 102 is a promising candidate for the DVS, primarily because this fluoroether oil is thermally stable and exhibits a viscosity closer to the targeted value of 20 mPa ∙ s at 533 K and 241 MPa than any other fluid reported to date. Nonetheless, further studies must be conducted by other researcher groups using various types of viscometers and rheometers on samples of Krytox GPL® 102 from the same lot to further establish the properties of Krytox GPL® 102.

Research Organization:
National Energy Technology Lab. (NETL), Albany, OR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
DOE Contract Number:
FE0004000
OSTI ID:
1225780
Report Number(s):
A-UNIV-PUB-135; PII: 1500
Journal Information:
International Journal of Thermophysics, Vol. 34, Issue 10; ISSN 0195-928X
Publisher:
Springer
Country of Publication:
United States
Language:
English

References (11)

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Experimental density measurements of bis(2-ethylhexyl) phthalate at elevated temperatures and pressures journal August 2013
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On the use of the rolling-ball viscometer for the measurement of rheological parameters of power law fluids journal March 1973

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Related Subjects

Couette rheometer
deepwater viscosity standard
high pressure
Krytox® oil
rolling-ball viscometer