Establishing a Data Base for Gas Identification
Geochemical fingerprinting of natural gas uses inherent differences in chemical and isotopic compositions to distinguish gases from different sources. This technique has been shown to be an effective means of storage gas identification2,4. Although it is not necessary to add any “tracers” to the gas, the procedure can be greatly enhanced by the availability of an adequate data base to compare to. For example, distinguishing native gas from migrated storage gas requires establishing the geochemical compositions of gases from both sources. The most unequivocal samples of pure native gas are those collected prior to injection of any storage gas. Documentation of the occurrence of bacterial gases near gas storage reservoirs prior to storage activity can reduce the incidence of “false alarms” of reservoir leakage.
KeywordsIsotopic Analysis Storage Activity Archival Storage Storage Field Illinois State Geological Survey
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