摘要
Themeasurementofundergroundmediumvariationusingarepeatedartificialsourcehasgraduallybecomeanimportantgoaltopursue.Inrecentyears,wehavedevelopedandimprovedatechnologysystemwithlargecapacityairgunsexcitedinlandreservoirsbytransplantingmarineseismicexplorationtechnology.Theexcitationeffecthasacloserelationshiptoairguncapacity,waterenvironment,andexcitationconditions.Inviewthatlargecapacityairgunmustbeexcitedwithoutawaterenvironment,weexpandthesystemtouseindownhole.BasedontheBHS-2200LLdownholeairgunwithacapacityof250in3,thispapercarriesoutacomparativeanalysisonthecharacteristicsofanairgunsourceexcitedin0.2m-and5.0m-diameterwells,andtheresultsshowthat:(1)Thedominantfrequencyoftheairgunsignalexcitedina5.0mwellismainlyfrom10Hzto40Hz,lowerthanthatina0.2mwell,andthelargerbodyofwaterisgoodforbubbleoscillation.(2)Intermsofexcitingenergy,thesignalexcitedina5.0mwellhasstrongerenergythanina0.2mwell,withadifferenceof1orderinmagnitude,andthesignalcanbedetectedupto9kmexcitedina5.0mwellwithasingleshot.(3)Theairgunsignalhasgoodrepeatabilityinbothexcitationwells.Thedownholeairgunexcitationtechnologysystemhaspotentialapplicationindynamicmonitoringnearafaultzonewithasmallscalerange,explorationofoilandmineralresources,andmodernurbangeophysicalenvironment.
出版日期
2016年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
