Hydrocarbon occurrence and exploration in and around igneous rocks

摘要: Hydrocarbons can occur within and around igneous rocks, sometimes in commercially significant quantities. Igneous or closely associated rocks be hydrocarbon sources the conventional sense (biotic) as well possibly through abiotic processes. Maturation is extremely variable, depending on extrusive/intrusive nature of activity relative importance a deep heat source. volatiles hydrothermal fluids may also important mobilizing moving hydrocarbons. have good reservoir qualities, they produce their own trapping structures being part larger feature. Many exploration methods are individually unreliable an integrated approach most effective. Seismic, magnetotelluric, gravity magnetic surveys all provide helpful information. Geological mapping, geochemistry remote imagery helpful. Evaluation potentially commercial accumulations requires interpretation logs, which unusual characteristics. Drill stem production tests needed for evaluation before ends development begins.