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《四川盆地志留系龍馬溪組頁(yè)巖與美國(guó)Fort Worth盆地石炭系Barnett組頁(yè)巖地質(zhì)特征對(duì)比.pdf》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、地質(zhì)通報(bào)Vo1.30.NOS.2~3第3O卷第2-3期2011年3月GEoLoGICALBULLETINOFCHINAMar.,2011四川盆地志留系龍馬溪組頁(yè)巖與美國(guó)FortWorth盆地石炭系Barnett組頁(yè)巖地質(zhì)特征對(duì)比曾祥亮,劉樹(shù)根,黃文明,張長(zhǎng)俊ZENGXiang—liang,LIUShu—gen,HUANGWen—ming,ZHANGChang-jun成都理工大學(xué)/油氣藏地質(zhì)及開(kāi)發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室,四川成都610059StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation/Cheng
2、duUniversityofTechnology,Chengdu610059,Sichuan,China摘要:從沉積學(xué)、地球化學(xué)、生烴演化、構(gòu)造演化等方面,對(duì)美國(guó)FortWorth盆地石炭系Barnett頁(yè)巖和四川盆地下志留統(tǒng)龍馬溪組頁(yè)巖進(jìn)行了對(duì)比性研究,發(fā)現(xiàn)四川盆地志留系,特別是川南志留系頁(yè)巖氣具有較好的勘探前景。2套烴源巖共性與個(gè)性共存,具有相似的沉積背景、厚度、有機(jī)質(zhì)類(lèi)型(I~Ⅱ)和生烴演化史。但是,Barnett頁(yè)巖TOC值較高(3%-13%)、相對(duì)富集脆性礦物、頁(yè)巖的微孔隙發(fā)育;龍馬溪組頁(yè)巖埋藏較深(一般2000-4000m)、相對(duì)富集粘土礦物,且具有較
3、高的成熟度(普遍R。>2%)、較大的隆升幅度和較快的隆升速率(3000m/80Ma)。關(guān)鍵詞:四川盆地;Fortworth盆地;Barnett頁(yè)巖;志留系;龍馬溪組;頁(yè)巖氣中圖分類(lèi)號(hào):P534.4:P618.1文獻(xiàn)標(biāo)志碼:A文章編號(hào):1671~2552(2011)02/03—0372-13ZengXL,LiuSG,HuangWM,ZhangCJ.ComparisonofSilurianLongmaxiFormationshaleofSichuanBasininChinaandCarboniferousBarnettFormationshaleofFortWorth
4、BasininUnitedStates.GeologicalBulletinofChina,2011,30(2/3):372-384Abstract:Basedonthecharacteristicsofsedimentation,geochemistry,structureevolutionandhydrocarbongeneration,wecomparedCarboniferousBarnettFormationshaleFS)inForthWorthBasin(UnitedStates)withLowerSilurianLongma~Formationsh
5、ale(LFS)inSichuanBasin(China).TherearegoodshalegasexploringprospectsofLFSinSichuanbasin,especiallyinsouthernparts.Twosetsofsourcerocksarethesimilardepositionalenvironments,thickness,korogentypes(I~I(xiàn)I1)andhydrocarbongenerationprocesses.ButBarnettshalearemuchricherTOCcontent(3-13%),brit
6、tlemineralsandmicroporesmoredevelopment;LongrnaxiFormationshalearerelativelydeeperburialdepth(commonly2000~4000m),richerclaymineralcontent,higherthermalmaturity(generallyR。>2%),largeramphtudeuphfandquickrisingrates(3000m/80M~.Keywords:SichuanBasin;FortworthBasin;Barnettshale;Silurian;
7、LongrnaxiFormation;shalegas美國(guó)FortWorth盆地為前陸盆地,石炭系Bar—305m,平均厚度76mI41,埋深為1982-2592mIsl,可采nett頁(yè)巖是一套碎屑巖和碳酸鹽巖混合沉積,主要天然氣地質(zhì)儲(chǔ)量達(dá)(0.85-1.24)×10m3,頁(yè)巖氣產(chǎn)由黑色頁(yè)巖、黑色鈣質(zhì)頁(yè)巖、泥灰?guī)r、黑色白云質(zhì)頁(yè)量超過(guò)0.99x10Sm。/d[31。四川盆地是一個(gè)疊合盆地,巖和黑色含磷質(zhì)頁(yè)巖5種巖性構(gòu)成l1-2]。盆內(nèi)Barnett構(gòu)造和沉積演化較FortWorth盆地復(fù)雜,志留系龍頁(yè)巖覆蓋面積約1.29×10km2[3],最大厚度可達(dá)馬溪組也是一套
8、碎屑巖和碳