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1、第26卷8期中國(guó)煤炭地質(zhì)V01.26No.O82014年8月C0ALGEOLOGYOFCHINAAug.2014doi:lO.3969~.issn.1674—1803.2014.08.08文章編號(hào):1674—1803f2014)08—0034一O5沁南地區(qū)太原組頁(yè)巖氣成藏的構(gòu)造控制朱炎銘,周曉剛1,2,胡琳。(1.中國(guó)礦業(yè)大學(xué)資源與地球科學(xué)學(xué)院,江蘇徐州22116;2.中國(guó)礦業(yè)大學(xué)煤層氣資源與成藏過程教育部重點(diǎn)實(shí)驗(yàn)室,江蘇徐州221116;3.云南省煤炭地質(zhì)局煤層氣公司,云南曲靖655000)摘要:沁水盆地頁(yè)巖氣勘探開發(fā)尚處于起步階段,區(qū)域內(nèi)廣泛發(fā)育的晚古生代海陸過渡相
2、地層具有重要的研究?jī)r(jià)值。針對(duì)沁水盆地南部地區(qū)復(fù)雜的頁(yè)巖氣地質(zhì)條件,以構(gòu)造演化為主線,以太原組為目的層,結(jié)合野外地質(zhì)觀測(cè),探討了沁南地區(qū)構(gòu)造對(duì)太原組頁(yè)巖氣成藏的控制作用。結(jié)果表明:沁水盆地南部主要以兩大褶皺帶和兩大斷裂帶為特點(diǎn);目的層大部分泥頁(yè)巖富含有機(jī)質(zhì)(TOC>I.5%),成熟度已超過2.5%,處于高一過成熟階段,已經(jīng)進(jìn)入干氣窗,生成了大量的熱成因甲烷。海西期以來(lái),目的層經(jīng)歷了2次沉降埋藏、3次抬升剝蝕作用,燕山中期巖漿熱作用促進(jìn)了泥頁(yè)巖的生烴作用,為頁(yè)巖氣富集成藏奠定了物質(zhì)基礎(chǔ)。關(guān)鍵詞:頁(yè)巖氣;構(gòu)造控制;太原組;沁南地區(qū)中圖分類號(hào):P618.130.2文獻(xiàn)標(biāo)識(shí)碼:A
3、StructuralControlofTaiyuanFormationShaleGasReservoiringinSouthernQinshuiBasinZhuYanming一.ZhouXiaogang,andHuLin(1.SchoolofResourcesandEarthScience,CUMT,Xuzhou,Jiangsu221116;2.KeyLaboratoryofCoalbedMethaneResource&ReservoirFormationProcess,MinistryofEducation,CUMTXuzhou,Jiangsu221116;3.Coa
4、lbedMethaneCompany,YunnanBureauofCoalGeologicalExploration,Qujing,Yunnan655000)Abstract:TheshalegasexplorationandexploitationintheQinshuiBasinisstillintheinitialstage.ThewidelydevelopedlatePaleozo—icmarine—terrestrialstrataintheareahavesignificantvaluetoresearch.Inallusiontothecomplexsha
5、legasgeologicalconditioninsouthernQinshuiBasin,takingstructuralevolutionasthecardinalline,TaiyuanFormationasthetarget,combinedwithfieldgeologicalobservation,discussedstructuralcontrolofTaiyuanFormationshalegasreservoiringinsouthernQinshuiBasin.Theresuhhasshownthattheareacharacterizedbytw
6、ofoldedzonesandtwofauhedzones;mosttargetargillutitearerichinorganicmatter(TOC>1.5%、.withmaturityexceed2.5%,thusinhigh—overmaturedstageandenteredintodrygaswindow,largeamountofthermogenicmethanegenerated.SincetheHercynian,thetargethasbeenexperienced2timesofsubsidedburyingand3timesofuplifte
7、ddenudation;mag—matichydrothermalactivityduringthemiddleYanshanianhadacceleratedargillutitehydrocarbongeneration,thusthematerialfounda—tionforshalegasenrichmentandreservoiring.Keywords:shalegas;structuralcontrol;TaiyuanFormation;southernQinshuiBasin0引言較復(fù)雜,具有盆地內(nèi)部穩(wěn)定,邊緣活動(dòng)性強(qiáng)的