US 12,352,738 B2
Mixing model to determine the composition of produced water using oxygen and hydrogen isotope ratios
Sattam S. Mutairi, Al Khobar (SA); and Ahmad A. Mashama, Saihat (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Sep. 1, 2022, as Appl. No. 17/901,510.
Prior Publication US 2024/0085394 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 33/18 (2006.01); G01N 21/31 (2006.01); H01J 49/26 (2006.01)
CPC G01N 33/18 (2013.01) [G01N 21/31 (2013.01); H01J 49/26 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
measuring an 18O/16O ratio (δ18O) and an 2H/1H ratio (δD) for each of a seawater sample, an aquifer water sample, and an original reservoir water sample;
measuring a δ18O and a δD in a produced water sample;
using the measured δ18O and δD for the aquifer water sample, the seawater sample and the original reservoir water sample to make a model; and
using the model to determine an amount of seawater, an amount of aquifer water, and an amount of original reservoir water in the produced water sample,
wherein the produced water sample comprises at least one member selected from the group consisting of the seawater, the aquifer water, and the original reservoir water.