Determination of fluid viscosities from biconical annular geometries: Experimental and modeling studies

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Title: Determination of fluid viscosities from biconical annular geometries: Experimental and modeling studies
Author: Rondon, Nolys Javier
Abstract: Knowledge of viscosity of flow streams is essential for the design and operation of production facilities , drilling operations and reservoir engineering calculations . The determination of the viscosity of a reservoir fluid at downhole conditions still remains a complex task due to the difficulty of designing a tool capable of measuring accurate rheological information under harsh operational conditions . This dissertation presents the evaluation of the performance of a novel device designed to measure the viscosity of a fluid at downhole conditions . The design investigated in this study addresses several limitations encountered in previous designs . The prototype was calibrated and tested with fluids with viscosities ranging from 1 to 28 cp under temperatures ranging from 100 to 160oF . Viscosity measurements were validated with independent measurements using a Brookfield viscometer . We proposed a mathematical model to describe the performance of the device for Power -law fluids . This model describes the response of the device as a function of the rheology of the fluid and the physical dimensions of the device . Experimental data suggests the validity of the model to predict the response of the device under expected operating conditions . This model can be used to calculate optimal dimensions of the device for customized target applications .
URI: http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2805
Date: 2009-05-15

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Determination of fluid viscosities from biconical annular geometries: Experimental and modeling studies. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2805 .

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