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dc.contributor.advisorNasr-El-Din, Hisham A.
dc.creatorXiao, Jie
dc.date.accessioned2014-05-13T17:28:05Z
dc.date.available2015-12-01T06:31:13Z
dc.date.created2013-12
dc.date.issued2013-12-06
dc.date.submittedDecember 2013
dc.identifier.urihttp://hdl.handle.net/1969.1/151876
dc.description.abstractIlmenite (FeTiO_(3)), with a mean particle size of 30 - 45 µm, was first introduced into the oil industry as weighting material in 1976. However, its use was limited mainly because of its abrasiveness to drilling equipment. Recently, a superfine ilmenite (5 µm) was introduced to address shortcomings of the traditional weighting materials. The objective of this study is to discuss the performance of oil-based drilling fluids using ilmenite as a weighting material for HPHT applications. Oil-based drilling fluids with a density of 1.92 SG containing API standard barite and ilmenite were compared. HPHT filtration tests under static and dynamic conditions were conducted at 300°F and 300 psi. Indiana limestone cores with an average porosity of 23 vol% and an average permeability of 100 md were used in the filtration tests. The rheological properties, sag tendency, the volume of filtrate, and the filter cake thickness of the oil-based drilling fluids were determined before and after heating at 400°F for 16 hours. Results showed that ilmenite-based drilling fluids had a sag factor of < 0.3 and a plastic viscosity of 25-30 cp, which was much lower than those of barite. HTHP filtration tests showed that under static conditions, the filter cake had a thickness of 0.18 in. and 2.9 cm3 of filtrate volume; while under dynamic conditions, the filter cake thickness was 0.15 in. and the filtrate volume was 2.2 cm3. The rheological properties of oil-based drilling fluids were constant after heating at 400°F for 16 hours. The filter cake thickness and sag factor were small even after 16 hours of heating. This study provides an evaluation of oil-based drilling fluids with ilmenite as a weighting material for HPHT wells, and gives recommendations on how to use it in the field.en
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.subjectOil-base Muden
dc.subjectIlmeniteen
dc.subjectHPHTen
dc.subjectFilter Cakeen
dc.subjectRemovalen
dc.subjectRheologyen
dc.titleExperimental Studies of Ilmenite as a Weighting Material in Oil-based Drilling Fluids for HPHT Operationsen
dc.typeThesisen
thesis.degree.departmentPetroleum Engineeringen
thesis.degree.disciplinePetroleum Engineeringen
thesis.degree.grantorTexas A & M Universityen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelMastersen
dc.contributor.committeeMemberEl-Halwagi , Mahmoud M.
dc.contributor.committeeMemberSchubert, Jerome J.
dc.type.materialtexten
dc.date.updated2014-05-13T17:28:05Z
local.embargo.terms2015-12-01


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