摘要
ThethermalhistoryandorganicmattermaturityevolutionofthesourcerocksofboreholesinthePuguanggasfieldwerereconstructed.Anintegratedapproachbasedonvitrinitereflectanceandapatitefissiontrackdatawasusedinthereconstruction.Accordingly,thegeothermalconditionsofgasaccumulationwerediscussedintermsofthegeologicalfeaturesofreservoirsinthenortheasternSichuanBasin.ThestratareachedtheirmaximumburialdepthintheLateCretaceouseraandwerethenupliftedanddenudedcontinuouslytothepresentday.ThegeothermalgradientandheatflowintheLateCretaceouserawereapproximately30.0°C/kmand66mW/m~2,respectively,whichwerebothhigherthanthoseatpresent.ThetectonothermalevolutionfromtheLateCretaceouseratothepresentischaracterizedbydenudationandcoolingprocesseswithanerosionthicknessof~2.7km.InadditiontotheTriassicera,theJurassicerarepresentsanimportanthydrocarbongenerationperiodforbothSilurianandPermiansourcerocks,andtheorganicmattermaturityofthesesourcerocksenteredintoadrygasperiodafteroilgeneration.Thethermalconditionsareadvantageoustotheaccumulationofconventionalandunconventionalgasbecausethehydrocarbongenerationprocessofthesourcerocksoccursaftertheformationofaneffectivereservoircap.Inparticular,thehighgeothermalgradientandincreasingtemperaturebeforethedenudationintheLateCretaceouserafacilitatedthegenerationofhydrocarbons,andthesubsequentcoolingprocessfavoreditsstorage.
出版日期
2016年05月15日（中国期刊网平台首次上网日期，不代表论文的发表时间）
