Physical and Rheological Behavior of HP/HT Fluids in the Presence of Water

An equation-of-state (EOS) -based phase-behavior model was developed to describe the behavior of high-pressure/high-temperature (HP/HT) fluids in the presence of water. The interaction between water and hydrocarbon was simulated by addition of an asymmetric (nonrandom) term to the attractive term of a conventional (random) mixing rule. Vapor/liquid and liquid/liquid hydrocarbon/water solubility data for a wide range of hydrocarbons were used to determine the binary interaction parameters of the conventional and nonrandom terms. The phase-behavior model was evaluated against two-phase and three-phase equilibrium data of hydrocarbon and water binary and ternary mixtures not used in developing the model.

View a Synopsis of SPE 94068.

This article, written by Assistant Technology Editor Karen Bybee, contains highlights of paper SPE 94068, "Physical and Rheological Behaviour of High-Pressure/High-Temperature Fluids in Presence of Water," by F. Gozalpour, SPE, A. Danesh, SPE, M. Fonseca, A.C. Todd, SPE, B. Tohidi, SPE, and Z. Al-Syabi, Heriot-Watt U., prepared for the 2005 SPE Europec/EAGE Annual Conference, Madrid, Spain, 13-16 June. The paper has not been peer reviewed.