Use of volumetric-average shear rate to test crosslinked fluids with the Fann 50 viscometer

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · SPE Production and Facilities

DOI:https://doi.org/10.2118/26895-PA· OSTI ID:87499

Fan, Y ^[1]; Holditch, S A ^[2]

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1. Univ. of Tulsa, OK (United States)
2. Texas A and M Univ., College Station, TX (United States)

The authors describe a method where laboratory tests of delayed, cross-linked fracturing fluids can be conducted, using different size bobs, to generate consistent, reproducible measurements of viscosity. In this paper, the authors demonstrate how either the EX-B2 or EX-B5 bob can be used to generate reproducible and correlatable viscosity data. A test method based on the volumetric-average shear rate (VASR), {gamma}{sub v}, is developed to measure the viscous properties of linked hydroxypropyl guar (HPG) gels. They show that the VASR method has two advantages over the nominal shear rate method. First, it takes into consideration the difference in the Couette region caused by the different size bobs. Second, the average non-Newtonian shear rate is used to evaluate the shear that the fluid has experienced. With this method, either the EX-B5 bob or the EX-B2 bob can be used to generate consistent viscosity data for the crosslinked HPG gels tested in this research.

• OSTI ID: 87499
• Journal Information: SPE Production and Facilities, Journal Name: SPE Production and Facilities Journal Issue: 3 Vol. 10; ISSN 1064-668X; ISSN SPRFEZ
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
CALCULATION METHODS
ENHANCED RECOVERY
FRACTURING FLUIDS
HYDRAULIC FRACTURING
NATURAL GAS WELLS
OIL WELLS
PROPPING AGENTS
RHEOLOGY
VISCOSITY
VISCOUS FLOW
WELL STIMULATION