Polymer relies on its special properties, which is an effective means to enhance oil recovery. But the composition of its produced liquid is very complex, especially emulsifying phenomenon severely constrains the process oil-water separation at a later stage. At present technical means of demulsification taken by both home and abroad oilfield mainly include physics, chemistry and other methods....

In this study, various water-soluble and oil-soluble demulsifiers were selected for separation of water from crude oil emulsions and their productivity measured using the Bottle-test method at 70 °C and 10 ppm concentration. The best ones among 23 demulsifiers examined through the screening process were fatty alcohol ethoxylate, triethanol amine and urea from the water-soluble group and Basoror...

The current practice for crude oil demulsifier selection consists of pre-screening the best performing demulsifiers followed by field trials to determine optimum dosage. method choice ranking is bottle test. As there no standard test method, are different methodologies reported in literature. In this work, a new approach and trial was described which improved significantly dosage demulsifier. o...

The effects of water/oil volume ratio, type and concentration of demulsifier, water salinity and mixing speed on the average water droplets size in water-oil emulsion are evaluated at different times through NMR measurements.The type and concentration of demulsifier have the greatest effects on the average droplet size with 38% and 31.5%, respectively. The water/oil volume ratio, water salinity...

The data presented in this article is related to the Master thesis; entitled "Survey Aerobic Microbial Diversity Mud Volcanoes in Chabahar and Khash Ports in Southern Iran" by the first author of this article, year 2011, Islamic Azad University, Iran (reference number (Parsia, 2011) [1] of this article). This article shows microbial biodiversity and evaluates bio-emulsifier and bio-demulsifier ...

the oil refining industries are using a number of demulsifiers for dewatering and desalination of crude oil but experience has shown that universal demulsifiers can not be produced. each kind of water in oil (w/o) emulsion requires specific by composition demulsifier. in practice, synergetic effect of the interaction between different types of demulsifiers is often sought. for dewatering the w...

A large amount of impurities in the oil when it is produced makes price decrease. Therefore, necessary to demulsify stable emulsion which not separated from oil, so that impurity level becomes low. For this reason, required add a demulsifier increase water separation higher. Demulsifier highly influenced by temperature, salt content, mixture, and time. In study result yields highest d NaCl 60%+...

A theoretical model is developed to consider the effect of demulsifier agent on demulsification of water-in-crude oil emulsion. A thermodynamic approach is considered to correlate the critical micelle concentration of a demulsifier to the collision frequency function in population balance equation (PBE). Based on the proposed correlation, the collision frequency function is modified to account ...

Demulsification is a method used to reduce or disrupt the water - crude oil emulsion system without uttering initial composition of oil. This process done by introduction chemicals called demulsifiers, which break into aqueous and organic phases. In this study, demulsifier formulated was base-catalyzed phenol-formaldehyde resin known as resoles, with ratios phenol formaldehyde, varied between 1...