ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,738, issued on July 8, was assigned to Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).
"Mixing model to determine the composition of produced water using oxygen and hydrogen isotope ratios" was invented by Sattam S. Mutairi (Al Khobar, Saudi Arabia) and Ahmad A. Mashama (Saihat, Saudi Arabia).
According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure relates to methods for determining an amount of seawater, an amount of aquifer water, and an amount of original reservoir water in a produced water sample using oxygen and hydrogen isotope ratios. An 18O/16O ratio (Delta18O) and a D/H ratio (DeltaD) are measured for a seawater sample, an aquifer water s...