ALEXANDRIA, Va., July 16 -- United States Patent no. 12,359,565, issued on July 15, was assigned to ConocoPhillips Co. (Houston).

"Real time downhole water chemistry and uses" was invented by Subhadeep Chowdhury (Houston) and Gary W. Targac (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "Method of monitoring produced water at each perforation or entry point by real time ion sensor deployed downhole to measure the content of water soluble ions is discussed. Methods of determining and differentiating nature of water breakthrough in oil production; such as between cycled injection water through a void space conduit, matrix swept injection water and formation water, especially as relates to offshore oil ...