Saudi Arabian Oil Company

Abdulkareem Mohamad AlSofi

Ziyad Kaidar

Jawaher Almorihil

Abdulaziz AlKhateeb

A method includes determining a critical micelle concentration (C) of a sample with an unknown concentration (C) of a surfactant based on an assumed surfactant concentration (C) of the sample, providing a benchmark solution with a known concentration of the surfactant, determining an actual critical micelle concentration (C) of the surfactant from the benchmark solution, and calculating the unknown concentration (C) of the surfactant in the sample from the following equation: C=C/(C/C).

CMC-based method for surfactant concentration determination

A system for sidewall coring includes a sidewall coring tool lowered into a wellbore for positioning a coring bit inside a subterranean formation, an injection assembly, and an array of sensors. The coring bit is capable of collecting a core sample by rotating with respect to a housing of the sidewall coring tool. The injection assembly injects a plurality of fluids into a sidewall core and is configured to selectively inject a plurality of fluids into the core sample. The array of sensors is embedded within a sidewall cutter enclosure for recording measurements during an injection process. The array of sensors produces information relating to the core sample.

Sidewall experimentation of subterranean formations

Disclosed is a method for estimating porous-media longitudinal dispersion and adsorption coefficients. According to various embodiments of the invention, a method for estimating porous-media longitudinal dispersion coefficients is provided, which includes introducing a pure phase component though a porous medium, and introducing a component having a same phase as the pure phase component through the porous medium. The component includes a viscosifying agent having a non-linear viscosity-concentration dependence. The method further includes measuring, using a permeability analyzer, a pressure drop across the porous medium after each introduction at a plurality of intervals over a period of time. Further, the method includes determining, using the measured pressure drops, a pressure transition, and analyzing the pressure transition across the porous medium to determine a dispersion coefficient for the porous medium.

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Al Khobar, Saudi Arabia

Abdulkareem Mohamad AlSofi