9 Computer software relating to the analyses of underground petroleum reservoirs. Computer software relating to the simulation and analyses of wells in a petroleum reservoir, namely the analyses and simulation of (a) injection/production of fluids, water, gases and other materials found in petroleum reservoirs, (b) sensor measurements and/or data related to petroleum reservoirs, (c) wellbore branches, (d) tubing and equipment used for potential or actual construction to access a petroleum reservoir or well therein. Computer software relating to the analysis and simulation of subsurface petroleum reservoirs, production engineering networks, wells, geomechanics and associated workflows.