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《塔中地區(qū)北部斜坡帶下奧陶統(tǒng)碳酸鹽巖風(fēng)化殼油氣富集特征》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、維普資訊http://www.cqvip.com學(xué)兔兔www.xuetutu.com專天然乞比第29卷第2期OIL&GASGE0L0GY2008年4月文章編號(hào):0253—9985(2008)02—0167—07塔中地區(qū)北部斜坡帶下奧陶統(tǒng)碳酸鹽巖風(fēng)化殼油氣富集特征韓劍發(fā),于紅楓,張海祖,羅春樹,敬兵,黃廣建,吉云網(wǎng)4,董瑞霞(1.中國(guó)地質(zhì)大學(xué)資源學(xué)院,湖北武漢430074;2.中國(guó)石油天然氣股份有限公司塔里木油田分公司勘探開發(fā)研究院,新疆庫(kù)爾勒841000)摘要:塔里木盆地塔中地區(qū)北部斜坡帶下奧陶統(tǒng)發(fā)育大型碳酸鹽巖風(fēng)化殼。對(duì)風(fēng)化殼儲(chǔ)層及其成藏條件的
2、研究表明,風(fēng)化殼儲(chǔ)層類型以次生溶蝕孔洞形成的低孔、低滲儲(chǔ)層為主,儲(chǔ)層主要發(fā)育于下奧陶統(tǒng)頂部,分布范圍與古構(gòu)造活動(dòng)形成的不整合面形態(tài)具有較好的對(duì)應(yīng)關(guān)系。斷裂及裂縫的發(fā)育對(duì)改善風(fēng)化殼儲(chǔ)層具有重要作用,形成了縱向上疊置、橫向連片、沿巖溶斜坡部位廣泛分布的風(fēng)化殼儲(chǔ)層。斷裂和不整合面構(gòu)成的輸導(dǎo)體系控制了風(fēng)化殼的油氣運(yùn)聚成藏,儲(chǔ)層發(fā)育程度控制了風(fēng)化殼的油氣富集程度,多期油氣充注與風(fēng)化殼儲(chǔ)層非均質(zhì)性造成了風(fēng)化殼油氣賦存的差異性。關(guān)鍵詞:碳酸鹽巖;風(fēng)化殼;油氣富集規(guī)律;奧陶系;北部斜坡帶;塔中地區(qū)中圖分類號(hào):TEl22.2文獻(xiàn)標(biāo)識(shí)碼:ACharacteristi
3、csofhydrocarbonenrichmentintheLowerOrdoviciancarbonaterockweatheringcrustonthenorthernslopezoneofTazhongareaHanJianfa,YuHongfeng,ZhangHaizu,LuoChunshu,JingBing,HuangGuangjian,JiYungang。,DongRuixia(1.SchoolofResources,ChinaUniversityofGeosciences,Wuhan430074,China;2.PetroleumE
4、xplorationandDevelopmentResearchInstitute,Tarimoi~laCompany,PetroChina,Korla841000,China)Abstract:Alarge—scaleOrdoviciancarbonateweatheringcrustwasdevelopedonthenorthslopeofTazhongareainTarimbasin.Studiesontheweatheringcrustreservoirsanditsreservoiringconditionsshowthattheres
5、ervoirsfeatureinlowporosityandlowpermeabilitydominatedbysecondarysolutionporesandcavities.TheyaremostlydevelopedonthetopoftheLowerOrdovicianandhaveanexcellentcorrespondencerelationshipwiththenor-phologyoftheunconformitysurface.Reformedbythedevelopmentoffaultsandfractures,thew
6、eatheringcrustreservoirswerewidelydistributedalongthekarstslopeverticalsuperimpositonandhorizontalconnection.Thehydrocarboncarriersystemwhichiscomposedoffaultsandunconformitiescontrolledthemigrationandaccumu—lationofhydrocarbons;andthedevelopmentofreservoirscontrolledtheenric
7、hmentofoilandgasintheweathe—ringcrust.Muhiphasechargingandheterogeneityofthereservoirscausedthedifferencesofoilandgasoccur-rence.Keywords:carbonaterock:weatheringcrust;oil/gasenrichmentpattern;Ordovician;northernslopezone;Tazhongarea塔里木盆地塔中地區(qū)下古生界碳酸鹽巖一直現(xiàn)了勘探思路的轉(zhuǎn)變,即由潛山構(gòu)造勘探向儲(chǔ)層是油氣
8、勘探的重要領(lǐng)域。近年來(lái),通過奧陶系巖性勘探轉(zhuǎn)變,由潛山高部位、斜坡高部位向斜坡碳酸鹽巖不整合面的重新認(rèn)識(shí),強(qiáng)化技術(shù)攻關(guān),實(shí)低部位轉(zhuǎn)變,勘