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1、石油勘探與開發(fā)2012年2月PETR0LEUMEXPLORATIONANDDEVELOPMENTVol-39No.169文章編號(hào):1000-0747(2012)01—0069-07川南下寒武統(tǒng)筇竹寺組頁(yè)巖氣形成條件及資源潛力黃金亮,鄒才能,李建忠,董大忠,王社教,王世謙2,程克明(1.中國(guó)石油勘探開發(fā)研究院;2.中國(guó)石油西南油氣田公司)基金項(xiàng)目:國(guó)家科技重大專項(xiàng)“大型油氣田及煤層氣開發(fā)”(2011ZX05018.001)中國(guó)石油勘探開發(fā)研究院中青年創(chuàng)新基金項(xiàng)目(2010.B.16—09)摘要:利用四川I盆地南部地區(qū)最新鉆探
2、的井下資料、周邊露頭地質(zhì)調(diào)查資料及大量樣品的分析測(cè)試結(jié)果,從富有機(jī)質(zhì)頁(yè)巖區(qū)域展布、地球化學(xué)特征、巖石儲(chǔ)集特征、含氣性等方面研究川南地區(qū)下寒武統(tǒng)筇竹寺組頁(yè)巖氣形成條件與資源前景。研究區(qū)筇竹寺組有機(jī)質(zhì)含量高(TOC值為0.55%~25.70%,平均值大于2%),頁(yè)巖有效厚度大(黑色頁(yè)巖厚60~300m),脆性礦物含量較高(大于40%),頁(yè)巖中發(fā)育豐富的納米一微米級(jí)孔隙和微裂縫,含氣量高(頁(yè)巖含氣量O.27~6.02m/t,平均1.90m/t),有利于頁(yè)巖氣的形成與富集。鉆井過(guò)程中筇竹寺組氣顯示頻繁并獲得了工業(yè)性突破,是目前中國(guó)
3、最有利的頁(yè)巖氣勘探開發(fā)層系之一,綜合對(duì)比研究認(rèn)為威遠(yuǎn)、敘永一筠連地區(qū)是研究區(qū)內(nèi)筇竹寺組頁(yè)巖氣勘探開發(fā)最有利的地區(qū)。圖4參23關(guān)鍵詞:四川盆地南部;下寒武統(tǒng);筇竹寺組;頁(yè)巖氣;形成條件;資源前景中圖分類號(hào):TEl22.1文獻(xiàn)標(biāo)識(shí)碼:AShalegasgenerationandpotentialoftheLowerCambrianQiongzhusiFormationinSouthernSichuanBasin,ChinaHuangJinliang,ZouCaineng,LiJianzhong,DongDazhong,Wang
4、Shejiao,WangShiqian,ChengKeming(1.PetroChinaResearchInstituteofPetroleumExploration&Development,Beij'ing100083,China;2.PetroChinaSouthwestOil&GaseldCompany,Chengdu610051,China)Abstract:Accordingtothelatestdrillingdata,thegeologicsurveyofsurroundingoutcropsandthela
5、boratorytestresultsofrocksamples,thispaperstudiestheregionaldistribution,geochemicalandreservoircharacteristicsandgasconcentrationoforganic—richshalestorevealtheshalegasgenerationandpotentialoftheLowerCambrianQiongzhusiFormationoftheSouthernSichuanBasin.Thestudyar
6、ea~atureshighorganiccontent(withTOCbetween0.55%and25.7%,averageofmorethan2%),greatnetshalethickness(of60—300m),highbrittlemineralcontent(over40%),abundantmicro·andnanometer-sizedporesandmicro—fractures,andhighgascontent(O-27—6.02m/t,averageof1.90m/t),whichisinfavo
7、rofthegenerationandaccumulationofshalegas.TheLowerCambrianQiongzhusiFormationisoneofthemostfavorablestratawhichhasfrequentgasshowandindustrializationbreakthroughduringdrilling,andtheWeiyuanandXunyong—Junlianareasaretwomostrealisticandfavorabletargetsforshalegasexp
8、lorationanddevelopment.Keywords:SouthernSichuanBasin;LowerCambrian;QiongzhusiFormation;shalegas;accumulation;resourcepotential0引言料、最新鉆探的井下資料分析結(jié)果為基礎(chǔ),對(duì)四川盆