INTERFACIAL TENSION MEASUREMENT BY SESSILE DROP USING DIGITAL IMAGE PROCESSING

[摘要] In enhanced oil recovery the displacement of oil is most effective at low interfacial tensions, usuall below 10$sp{-2}$ dyne/cm. This condition can be achieved by surfactant or chemical flooding but requires accurate modeling of reservoir conditions and determination of interfacial tensions, IFTs. The spinning drop technique is very popular but the sessile drop method offers the advantage that it is a static system. Most previous systems required a photograph to be taken and analysis was limited to key coordinates along the profile. A sessile drop system has been designed which allows drops or bubbles to be formed by injection through the base, uses a digital image processor for recording of the profile coordinates and partial analysis, and performs an optimization on the shape of the drops based on an accurate objective function using the entire profile. Measurements have been made for IFTs from 7 dyne/cm. to as low as 0.005 dyne/cm.

[发布机构] Rice University