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Title: Understanding fluid self-diversion for oil-field applications through rheology, colloid science and porous flow
Author: Lee, Jim
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2011
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This PhD is concerned with fluid flow through porous media and fluid diversion in oil reservoirs, through the understanding of rheology, colloid science and porous flow experiments. The aim is to better understand porous flow and apply the findings to address field questions such as how to rheologically deliver fluids to low permeability zones, and what are the effects of shear-thinning and shear-thickening on porous flow. This was approached with both rheometric and porous flow studies on six chemical systems. Rheometric studies were conducted on the Malvern Bohlin CVO and TA AR-1000N rheometers with a cone and plate geometry. A porous flow instrument was designed, built and tested, where Ballotini spheres were used as the porous media. Two Newtonian systems, sucrose solutions and silicone oils were used for the porous flow instrument calibration. Four non- Newtonian systems of varying rheological behaviours were used to examine the effects of rheology on porous flow. These systems were the shear-thinning Xanthan and HMHEC, thixotropic Laponite and shear-thinning and -thickening PEO/silica mixtures. The experimental data were examined with Darcy's Law, the Hagen- Poiseuille equation, the Cross, Herschel Bulkley, and the Power-Law model, Reynolds number and the Kozeny-Carman equation, as well as empirical models proposed by the author. An empirical shear-rate / volumetric flow rate relationship was formulated. This allowed for pressure drop / flow rate relationship predictions based on rheometric viscosity / shear rate data. A new approach to modeling porous flow is also proposed. It is hoped that the findings and proposals can provide a better understanding of porous flow, predict fluid behaviour in porous media, and ultimately translated for field applications, namely the 'heel and toe' problem.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available