四川盆地下志留统龙马溪组页岩气成藏条件

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1、目录摘要······································································2关键字·····································································21生烃条件31.1地层和岩性特征31.2有机碳含量41.3有机质类型41.4热演化程度52储集条件52.1孔隙52.2缝和不整合面62.3吸附气含量63封盖及保存条件74气测显示及有利地区预测75结论86参考文献·······························

2、····································8四川盆地下志留统龙马溪组页岩气成藏条件及有利地区分析蒲泊伶1蒋有录1王毅2包书景2刘鑫金1（1、中国石油大学地球资源与信息学院山东东营257061；2、中国石化石油勘探开发研究院北京100083）摘要:四川盆地下志留统龙马溪组发育富含有机质页岩。作为页岩气的源岩，该套页岩在盆地内分布广泛,厚度大，有机质含量高,有机质类型好，热演化程度高，生气潜力大；作为储层,页岩中孔隙和裂缝发育，为页岩气提供了充足的储集空间,并且等温吸附实验也表明，页岩具有较强的气体吸附能力；由于页岩的致密性及抗构造破坏性

3、,本地区构造条件满足页岩气成藏要求。多口井下志留统页岩的气测显示也为页岩气的存在提供了有利证据。根据页岩厚度、有机碳含量、热演化程度和生烃强度等信息，预测宜宾---自贡---泸州一带及达州---万县一带为页岩气的有利勘探区域。关键词:四川盆地；龙马溪组；页岩气；热演化程度；气体吸附能力；成藏条件；有利勘探区带中图分类号:TE112文献标识码:A文章编号:0253-2697(2010)02-0225-06Reservoir-formingconditionsandfavorableexplorationzonesofshalegasinLowerSilurianLo

4、ngmaxiFormationofSichuanBasinPUBoling1JIANGYoulu1WANGYi2BAOShujing2LIUXinjin1（1.CollegeofGeo-resourcesandInformation,ChinaUniversityofPetroleum,Dongying257061,China;2.SinopecResearchInstituteofPetroleumExplorationandProduction,Beijing100083,China）Abstract:Theredevelopsshalewithrichorg

5、anicmattersinLongmaxiFormationoftheLowerSilurianinSichuanBasin.Thisshalewithagreatthicknessisthesourceofshalegasandwidelydistributedinthebasin.Asthesource,theshaleischaracterizedashighorganiccontent,goodorganictypeandhighorganicthermalevolutiondegree.Asthereservoir,thereexitsgreatquan

6、tityofcracks,porousandwrinkles,whichofferssufficientaccumulatedspaceforshalegas.Theisothermaladsorptiontestshowsthattheshalehasstrongabilityofgasadsorption.Thestructuralconditioninthisbasinisavailableforformingshalegasreservoir.ThegasshowsofmanywellsdrilledintheshalestrataoftheLowerSi

7、lurianinthisareaindicatedthegreatpotentialofshalegas.Theshaleindexesofthicknessdistribution,organiccarboncontent,thermalevolutiondegreeandgasgenerationlevelinSichuanBasinshowthatYibin-Zigong-LuzhouandDazhou-Wanxianareasarethefavorablezonesforshalegasexploration.Keywords:SichuanBasin;L

8、ongma