ALEXANDRIA, Va., June 16 -- United States Patent no. 12,655,734, issued on June 16, was assigned to ConocoPhillips Co. (Houston).

"Methods for shut-in pressure escalation analysis" was invented by Nicolas P. Roussel (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods for using shut-in pressures to determine uncertainties in a hydraulic fracturing process in a shale reservoir are described. Data commonly collected during multistage fracturing is used to calculate propped fracture height and induced stresses, as well as other variables, in the presence of horizontal stress anisotropy. These variables can then be incorporated into reservoir simulations to improve the fracturing monitoring, forecast ...