資源描述：
《石油地質(zhì)學(xué)論文(石油地質(zhì)勘探論文)：陜北地區(qū)長(zhǎng)7沉積相特征及石油地質(zhì)意義》由會(huì)員上傳分享，免費(fèi)在線(xiàn)閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、石油地質(zhì)學(xué)論文(石油地質(zhì)勘探論文）：陜北地區(qū)長(zhǎng)7沉積相特征及石油地質(zhì)意義摘要:論文的目的：查明陜北地區(qū)延長(zhǎng)組長(zhǎng)7沉積環(huán)境及古地理演化，進(jìn)而尋找有利砂體及石油聚集區(qū)。論文的方法：采用野外觀察與室內(nèi)研究相結(jié)合的方法對(duì)長(zhǎng)7沉積相進(jìn)行專(zhuān)項(xiàng)研究。結(jié)果研究區(qū)發(fā)育三角洲相和湖泊相，三角洲前緣及深湖濁積巖發(fā)育。在古地理演化過(guò)程中，長(zhǎng)73湖盆達(dá)到鼎盛，淺湖區(qū)及深湖區(qū)分布范圍均最大，沉積了廣泛分布的張家灘油頁(yè)巖;三角洲砂體不太發(fā)育，濁積巖零星分布;從長(zhǎng)73—72—長(zhǎng)71，湖岸線(xiàn)及深湖線(xiàn)均向湖內(nèi)收縮，三角洲前緣砂體及濁積砂體逐
2、漸發(fā)育。論文的結(jié)論：發(fā)育良好的油頁(yè)巖為延長(zhǎng)組主要的烴源巖，而三角洲及濁積巖砂體可以作為好的儲(chǔ)層。關(guān)鍵詞:長(zhǎng)7;延長(zhǎng)組;沉積相;陜北地區(qū);石油地質(zhì)意義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研究區(qū)地處鄂爾多斯盆地陜北斜坡，該斜坡為微向西傾斜的單斜構(gòu)造。盆地內(nèi)構(gòu)造相對(duì)簡(jiǎn)單，以鼻狀構(gòu)造為主，地層平緩，傾角一般
8、不足1°。根據(jù)沉積序列，延長(zhǎng)組可劃分為5個(gè)巖性段:T3y1—T3y5。同時(shí)，根據(jù)油層縱向分布規(guī)律自上而下又可劃分為長(zhǎng)1—長(zhǎng)10油層組［1］。延長(zhǎng)組經(jīng)歷了湖盆的產(chǎn)生、發(fā)展，演化及消亡的過(guò)程［2－3］。長(zhǎng)7最大湖泛期沉積的暗色泥巖、油頁(yè)巖為延長(zhǎng)組的主要烴源巖。根據(jù)沉積旋回，長(zhǎng)7自上而下為長(zhǎng)71、長(zhǎng)72、長(zhǎng)73he"governingforthepeople","Nomattertheinterestsofthemasses"con
