Gas-geochemical predicting and system assessment of oil and gas prospects for the purpose of increasing exploration efficiency

SUMMARY The methodology of the system and analytic predicting of oil-and-gas prospects of the mineral resources is suggested. The criteriality of gas and geochemical indicators are explained. The criteria parameters, systematically structured into the identity space of the geoinformation environment of oil and gas deposits, are identified. The algorithm of the computational procedures for the reflecting of oil-and-gas prospects in percent of saturation of gas-geochemical properties by geological meaning is developed; the very procedures are identified as formalized fluid storage capacities, abyssal and pressure-temperature ones, and flow and geometric reservoir properties. The procedure of identifying of reliable local gas-geochemical objects (in other words, zones of ‘minor prospecting risk’) is formalized in order to enhance efficiency of the process of their localization, thus wise to minimize the risk at later stages of exploration