{"thcode":2,"term":{"code":2295,"name":"hydrocarbon reservoir processes","parent":101,"scope":"Interactions among groundwater, hydrocarbons, and rock properties of subsurface geological formations, affecting the potential of those formations to form, trap, and permit the passage and extraction of hydrocarbons."},"uf":[],"bt":[{"code":101,"name":"biological and physical processes","parent":1174,"scope":"All continuing activities, functions, and phenomena associated with organisms and non-living matter."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":1731,"name":"carbon sequestration","parent":435,"scope":"Long-term storage of carbon in soils and terrestrial organic material, either by natural or engineered processes. Typically of importance for the balance of CO2 in the global climate system. "},{"code":312,"name":"economic geology","parent":464,"scope":"Scientific study of the formation, location, and use of marketable geologic materials including fuels, metals, minerals, and water."},{"code":2282,"name":"fluid migration","parent":451,"scope":"Movement or migration of fluids, including petroleum and other chemicals through earth materials by natural or anthropogenic forces."},{"code":554,"name":"hydrogeology","parent":464,"scope":"Study of subsurface waters and geologic aspects of surface waters."},{"code":1368,"name":"permeability","parent":1367,"scope":"The ability of fluids to pass through an earth material, typically depending on the connectedness of pore space in the material."},{"code":1369,"name":"porosity","parent":1367,"scope":"The proportion of open space in a rock or unconsolidated material."},{"code":2279,"name":"thermal maturation","parent":435,"scope":"Chemical alteration of organic material within sediments and sedimentary rocks as a result of heat. Measures of thermal maturation indicate the extent of transformation of detrital organic material into coal and petroleum."}]}