Screening of CO2-philic surfactants morphology for high temperature-pressure sandstone reservoir conditions

摘要: Abstract The conventional foaming surfactants have drawbacks such as premature lamellae rupture in contact with oil, copious water amount required for foam generation, adsorption issue or surfactant partitioning water/oil interface, salinity tolerance problem and instability at temperature high pressure. addition of CO2-philic functionalities structure blending is suggested to alleviate these problems, improve mobility control, accelerate propagation. In our previous publications, performance a newly developed blend was described based on structure-property characterization Malaysian reservoir conditions. this study, we develop fast-track screening procedure sulfonate anionic design accounting the effect tail groups (single, double triple-tailed) morphology CO2 targeting pressure/high sandstone reservoirs. A visualized meter HTHP coreflood used observe generated. IFT solutions CO2were also examine attraction CO2. It observed that triple tailed perform better both bulk tests terms stability, propagation oil recovery 102 °C, pressure 125 bar 30,000 ppm. into increased activity C/W interface reduced surface tension. However, onto Berea rock showed direct relation number impose limitation it. selected superior betaine booster were compared absence presence where triple-tail performed than double-tail surfactants, expected.