ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,887, issued on Dec. 16, was assigned to Chevron U.S.A. Inc. (San Ramon, Calif.) and Schlumberger Technology Corp. (Sugar Land, Texas).

"Acceleration of subsurface simulation using filtered grid connectivity graph" was invented by Shingo Watanabe (Houston), Jostein Natvig (Asker, Norway) and Pavel Tomin (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A subsurface representation may define subsurface configuration of a subsurface region. A grid connectivity graph for the subsurface representation may include (1) nodes that represent cells within the subsurface representation, and (2) edges between the nodes that represent connectivity between ...