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1、石油勘探與開發(fā)3O2O11年2月PETR0IEUMEXPL0RAT10NANDDEVELoPMENTV01.38NO.1文章編號(hào):1000—0747(2011)01—003010鄂爾多斯盆地伊盟隆起上古生界天然氣成藏條件王明健,何登發(fā)。,包洪平。,魯人齊,桂寶玲(1.中國(guó)地質(zhì)大學(xué)(北京)能源學(xué)院;2.海相儲(chǔ)集層演化與油氣富集機(jī)理教育部重點(diǎn)實(shí)驗(yàn)室;3.中國(guó)石油長(zhǎng)慶油田勘探開發(fā)研究院)基金項(xiàng)目:國(guó)家自然科學(xué)基金項(xiàng)目(40739906);國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(973)項(xiàng)目(2006CB202300)摘要:利用含油氣系統(tǒng)的概念與方法研究伊盟隆起上古生界天
2、然氣成藏要素及成藏作用,總結(jié)其成藏模式。伊盟隆起上古生界天然氣主要來自隆起南部及烏審旗地區(qū)的太原組和山西組烴源巖;山西組和下石盒子組沖積扇相辮狀水道砂體、河流相河道砂壩砂體及三角洲平原亞相分流河道砂體為最有利儲(chǔ)集縣;上石盒子組和石千峰組辱縣泥巖構(gòu)成區(qū)域性蓋層,另有眾多局部蓋層;生、儲(chǔ)、蓋層具有良好的組合關(guān)系,形成自生自儲(chǔ)式(隆起南部)和下生上儲(chǔ)式(隆起南部、北部)生儲(chǔ)蓋組合。天然氣主要通過優(yōu)勢(shì)輸導(dǎo)砂體、不整合面、斷層和裂縫組成的輸導(dǎo)體系向北部運(yùn)移;隆起北部地區(qū)以局部構(gòu)造圈閉、遠(yuǎn)源成藏為主,而南部地區(qū)以巖性圈閉、近源成葳為主。圖l1表3參18關(guān)鍵詞:伊
3、盟隆起;上古生界;成藏地質(zhì)要素;運(yùn)移;圈閉;成藏模式中圖分類號(hào):TEl22.2文獻(xiàn)標(biāo)識(shí)碼:AUpperPalaeozoicgasaccumulationsoftheYimenguplift,OrdosBasinWangMingjian“,HeDengfa~,BaoHongping。,LuRenqi。,GuiBaoling(1.SchoolofEnergyResources,ChinaUniversityofGeosciences(Beijing),Beijing100083,China;2.MinistryofEducationKeyLaborato
4、ryofMarineReservoirEvolutionandHydrocarbonAccumulationMechanism,Beijing100083,China;3.ResearchInstituteofExplorationandDevelopment,PetroChinaChangqingCh'lfieldCompany,Xi’an710018,China)Abstract:ThispaperanalyzestheUpperPalaeozoicgasaccumulationsandconditionsofthestudyareabyusin
5、gthedefinitionandmethodofpetroleumsystem,andsummarizesthenaturalgasaccumulationpattern.TheUpperPalaeozoicnaturalgasintheYimengupliftismainlyfromsourcerocksofTaiyuanandShanxiFormationsinthesouthernpartandWushenqiarea.Braidedchannelsandbodiesofalluvialfan,riverchannelsandbodiesan
6、ddistributarychannelsandbodiesofdeltaplainintheShanxiandlowerShiheziFormationsarethemostfavorablereservoirs.ThethickmudstonelayersoftheupperShiheziandShiqianfengFormationswhichcoverthewholeregionconstitutetheregionalsealrock,andtherearealsomanylocalsealrocks.Oilsource,reservoir
7、andsealrocksformagoodrelationshipintimeandspaceandtheyformtwotypesofassemblagewhicharetheself—generatingandse1f_preservingassemblageinthesouthernpartoftheYimengupliftandthelower-generatingandupper_preservingassemblageinthesouthernandnorthernparts.Naturalgasmigratedtothenorththr
8、oughthemigrationpathwayscomposedbyadvantageoussandbody