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1、成都理工大学硕士学位论文松辽盆地北部中央坳陷区泉头组四段层序地层及沉积演化研究姓名：汪海燕申请学位级别：硕士专业：矿产普查与勘探指导教师：李仲东20090501成都理工大学硕士学位论文区泉四段工业油气流井各油层在各沉积微相中的分布规律，揭示了该区油气主要分布在河道砂岩中，包括曲流河边滩、三角洲平原水上分流河道和三角洲前缘水下分流河道。这三种沉积微相最有利于油气储集。综合考虑各项因素，并与三肇凹陷对比分析，在齐家－古龙凹陷Q4-sq1和Q4-sq2层序预测了有利勘探区。该区埋深相对较浅，T2断层发育，砂岩厚度和砂地比均符合岩性油藏或构造岩
2、性油藏的要求，是三角洲平原和三角洲前缘的过渡地区，分流河道必然发育，已有钻井表明该区确实存在油气，从而提出该区为有利勘探区。Q4-sq3时期齐家－古龙凹陷地区的浅水湖泊面积最大，在这个湖泊周围的三角洲前缘水下分流河道中发育了很多工业油流井，说明这些地区非常有利于油气聚集，今后应该加强对环齐家－古龙浅湖周围的勘探。关键词：松辽盆地北部中央坳陷区泉四段层序地层沉积相IIAbstractStudyonSequenceStratigraphyandEvolvementofSedimentintheCentralDepressionoftheNo
3、rthernSongliaoBasinIntroductionoftheauthor:WangHaiyan,female,wasborninMay,1983whosetutorwasProfessorLiZhongdong.ShegraduatedfromChengduUniversityofTechnologyininMineralResourceProspectingandexplorationmajorandwasgrantedtheMasterDegreeinJune,2009.AbstractInrecentyears,wit
4、hthedeepeningofgeologicalstudiessuchassequencestratigraphyandfinesedimentaryfacies,FuyuoillayerexplorationhasmadesignificantbreakthroughsinthenorthofSongliaoBasin.LargelithologyreservoirwasfoundinSanzhaosag.Inordertomakeabreakthroughinmoreplaces,thereisanurgentneedtodeep
5、entheunderstandingofpetroleumgeologiccharacteristicsofthemember4oftheQuantouFormationinthecentralDepressionofthenorthernSongliaoBasin.Thearticlestudyonthesequenceandsedimentaryfacies,whichisbasedonthepetroleumgeologytheory,analysistechnologyofhighresolutionsequencestrati
6、graphyandcore,welldrilling,wellloggingandseismicdata.Basedonalargenumberofcoreobservations,thetypesofrockfaciesandsedimentaryfaciesarehighlighted.Itindicatesthatmiddle-scaletroughcrossstratificationfinesandstonefaciesandsmall-scaletroughcrossstratificationsiltstonefacies
7、,totally12typesofrockfaciesaredeveloped,differenttypesofrockfaciescombinedwithacertainwaytoconstitutedifferenttypesofsedimentaryfacies.Thestudyareadevelopedmeanderingriver,shallow-waterdeltaandshallowlake,totally3typesofsedimentaryfacies,including8kindsofintrafacies,20ki
8、ndsofmicrofacies.Relyonthecore,loggingandseismicdataofthestudyarea,therecognizableindicatorsofhigh-reso
