石油地质学论文(石油地质勘探论文)：陕北地区长7沉积相特征及石油地质意义

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1、石油地质学论文(石油地质勘探论文）：陕北地区长7沉积相特征及石油地质意义摘要:论文的目的：查明陕北地区延长组长7沉积环境及古地理演化，进而寻找有利砂体及石油聚集区。论文的方法：采用野外观察与室内研究相结合的方法对长7沉积相进行专项研究。结果研究区发育三角洲相和湖泊相，三角洲前缘及深湖浊积岩发育。在古地理演化过程中，长73湖盆达到鼎盛，浅湖区及深湖区分布范围均最大，沉积了广泛分布的张家滩油页岩;三角洲砂体不太发育，浊积岩零星分布;从长73—72—长71，湖岸线及深湖线均向湖内收缩，三角洲前缘砂体及浊积砂体逐

2、渐发育。论文的结论：发育良好的油页岩为延长组主要的烃源岩，而三角洲及浊积岩砂体可以作为好的储层。关键词:长7;延长组;沉积相;陕北地区;石油地质意义SedimentaryfaciescharacteristicandpetroleumgeologicalsignificanceofChang7inShanbeiAreaPANGJun-gangAbstract:AimToascertaindepositionalsystemofYanchangformationChang7inShanbeiAreaandf

3、urthermoreprobefavorablesandbodyandhigh-yieldoilarea.MethodsCombinedresearchmethodsoffieldexplorationandindooranalysisareadopted，sedimentaryfaciesofChang7arestudiedasspecialitem.ResultsDeltaandlakefa-ciesarerecognized.Furthermore，he"governingforthepeople"

4、,"Nomattertheinterestsofthemasses"conceptunderstandingisnotinplace.Thespecificworktreatswiththedeployment,afewleadingcadrescomplainthatworkistoocomplicated,toomuchresponsibility,thepressureistoolarge,toomuchemphasisonthedifficultyofthework.Forexample,nonc

5、oalminethesub-faciesandmicro-faciesarerecognized，deltafrontandturbiditeindeeplakearebothdevelopedwell.Duringthepaleo-geographyevolutionofChang7，lakebasinisatitsbestduringChang73，shallowlakeanddeeplakearebothatitsbest，resultingtoZhangjiatanshalebroadlydist

6、ributed，deltasandstonedevelopednotwellandturbiditedistributedscattered;FromChang73，Chang72toChang71，lakeshorelineanddeeplakelinearebothmovedtowardlakecenter，butsandstonessedimentedbydeltafrontandturbiditegraduallydevelopedbetter.ConclusionThewelldeveloped

7、oilshalecanbeasgoodhydrocarbonsourcerockandsandstonesformedbydeltafrontandturbiditecanbegoodreservoir.Keywords:Chang7;Yanchangformation;sedimentaryfacies;ShanbeiArea;petroleumgeologicalsignificance研究区地处鄂尔多斯盆地陕北斜坡，该斜坡为微向西倾斜的单斜构造。盆地内构造相对简单，以鼻状构造为主，地层平缓，倾角一般

8、不足1°。根据沉积序列，延长组可划分为5个岩性段:T3y1—T3y5。同时，根据油层纵向分布规律自上而下又可划分为长1—长10油层组［1］。延长组经历了湖盆的产生、发展，演化及消亡的过程［2－3］。长7最大湖泛期沉积的暗色泥岩、油页岩为延长组的主要烃源岩。根据沉积旋回，长7自上而下为长71、长72、长73he"governingforthepeople","Nomattertheinterestsofthemasses"con