济阳坳陷桩海地区新近系河流相油气成藏规律研究

打开文本图片集

中图分类号：P618.13 文献标识码：A 文章编号：2097-5465（2026）02-0078-06

Abstract：TheZhuanghai Areaof theJiyangDepresionisadjacenttohydrocarbon-generatingsags，boastsabundantpetroleum resources，ndeibitsfavorablereservoir-formigconditions.Neogenestructural-lithologicreservois，primarilyevelopdround majorfaultsystemswithinstructurallcomplexzones，havelongbeenakeyfocusforexplorationdevelopment.Basedon datafromdrillstemtesting，productiontesting，explorationpractices，thisstudysystematicallyanalyzesreservoir characteristics，controllngfactors，dierentialhydrocarbonaccumulationmodelsinheara，culminatinginastsisof hydrocarbonenrichmentpaterns.Thestudyconcludesthatsourcefaultsplayadecisiveroleinreservoirformation，whilefavorable reservoir-caprockassmblagesarekeytocontrolinghdrocarbondistribution.Individualreservoirsaesignificantlyiuecedby micro-structures.ThehydrocarbonaccumulationmodelsforNeogenereservoirsinthestudyareacanbecategorizedbasedonriver types：ahigh-conectivitymodelasociatedwithbraidedrvers，amedium-connectivitymodelwithanastomosingrivers，lowconnectivitymodel related to meeringrivers.

Keywords： fluvial facies；GuantaoFormation；hydrocarbonacumulationmodel；hydrocarbonaccumulation patern；Jiyang Depression

0 引言

桩海地区位于济阳坳陷沾化凹陷的东北部，垦东—桩海—埕岛潜山披覆构造带的中部，构造上处于埕岛潜山、桩西潜山、长堤潜山的结合部位（图1），地质结构较为复杂[1-4]。（剩余6110字）