The objective of this program is to utilize the current test facilities at The University of Tulsa, as well as member company expertise, to enhance our understanding of paraffin deposition in single and two-phase (gas-oil) flows; conduct focused experiments to better understand various aspects of deposition physics; and utilize knowledge gained from experimental modeling studies to enhance the computer programs developed in the previous JIP for predicting paraffin deposition in single and two-phase flow environments.  These refined computer models will then be tested against field data from member company pipelines.