Some oil fields produce from different reservoirs, which may be incompatible generating precipitates. These precipitates are often asphaltenes, can an emulsion stabilizing agent negatively affecting the treatment processes. In this work, influence of incompatibility on stabilization water-in-oil emulsions was studied. Emulsions were evaluated three oils (A, B and C) their mixtures (AB, AC, BC A...

In this work, the natural depletion process in sandstone and carbonate cores was modeled to investigate the asphaltene deposition mechanisms. A new permeability reduction correlation was proposed based on the Minssieux model that considers a combination of surface deposition, pore throat plugging, and filtration cake mechanisms. The results showed that the filtration cake is a dominant asphalte...

Energy & Fuels is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Article Sensitivity of Asphaltene Properties to Separation Techniques H. Alboudwarej, J. Beck, W. Y. Svrcek, H. W. Yarranton, and K. Akbarzadeh Energy Fuels, 2002, 16 (2), 462-469• DOI: 10.1021/ef010213p • Publication Date (Web): 06 February 2002 Downloaded from http://pubs.acs.org on ...

Here, we investigate the surface shear rheology of class II HFBII hydrophobin layers at the oil/water interface. Experiments in two different dynamic regimes, at a fixed rate of strain and oscillations, have been carried out with a rotational rheometer. The rheological data obtained in both regimes comply with the same viscoelastic thixotropic model, which is used to determine the surface shear...

Experiments are described which demonstrate that asphaltenes precipitated from a refinery tar using an excess of n-heptane spontaneously partition into a contacting water phase in the presence of an ethoxylated nonionic surfactant by effecting a temperature change. The process appears to be related to the temperature-dependent phase behaviour of the particular surfactant. Hot (ca. 80-90°C) aque...

The response of Asian monsoon precipitation to contrasting orbital parameters is simulated using the MRI-CGCM climate model. Results show that for the 125 kya B. P. experiment , a large continental heating due to obliquity forcing is apparent and accounts for the strengthened cross equatorial flow, stronger monsoon westerly over the Ara-5 bian Sea, and an enhanced precipitation over the Indian ...