页岩孔隙结构扫描电镜分析方法研究

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1、页岩裂缝发育主控因素及其对含气性的影响丁文龙「2,李超"，李春燕3,许长春「2,久凯勺曾维特1.中国地质大学北京)能源学院，北京1000832.中国地质大学北京)海相储层演化与油气富集机理教育咅3重点实验宰.北京1000833.中国石化勘探南方分公司，四川成都610041DingWenlong1,2.LiChao1,2.LiChunyan3,XuChangchun1,2.JiuKai1,2.ZengWeite1'21.SchoolofEnergyResources.ChinaUniversilyofGeosciences6eijing),Beijing1000

2、83，China2.KeyLaboratoryforMarineReservoirEvolutionandHydrocarbonAbundanceMechanism・MinistryofEducation・ChinaUniversiiyofGeosciencesBeijing)・Beijing100083^China3.ChinaPetroleumandChemicalCorporationExplorationSouthernCompany•Chengdu610041,ChinaDingWenlong,LiChao,LiChunyan,etal.Domina

3、ntfactoroffracturedevelopmentinshaleanditsrelationshiptogasaccumulation.EarthScieneeFrontiers,2012.192):212-220Abstract:Shalewithhighquartz，feldsparandcarbonatewillhavelowPoisson*sratio，highYoungmodulusandhighbrittleness・Asaresult,theshaleisconducivetoproducenaturalandinducedfractu

4、resunderexter-naIforces.Ingenerahthereisagoodcorrelationbetweenfracturedevelopmentinshaleandthevolumeofbrit-tierrineralspresent.ShalewithhighTOCorabnormallyhighpresslirehaswell-developedfractures.Shalefractuiedevelopmentalsoshowsapositivecorrelationwithtotalgasaccumulationandfreegas

5、volume,i.e.•thebettrshalefracturesaredeveloped・thegreaterthegasaccumulationandthereforethehigherthegaspro-duction.Frcturesprovidemigrationconduitsandaccumulationspacesfornaturalgasandformationwater,whicharefav

6、ingasloss・InNorthAmericathereisahighsuccessratioofshalegasexplorationandhighgasproductionfromhigh-aglefracturezonesnshale.GoodnaturalgasshowsorhighyieldproducersintheLowerPaleozoicmarineor-ganicmatter-richrocksintheSichuanBasinarecloselyrelatedtothedegreeoffracturedevelopmentinbritt

7、leshales.Keywords:shale；fracture；dominantfactor:gasaccumulation；gasproduction摘要：依据国内外页岩气大呈资料和测试数据，对影响页岩裂缝发育的岩性和矿物组成.有机硕含呈■岩石力学性质、异常高压等非构造因素和构造因素逬行了左性或半定屋分析，初步探讨了页岩裂缝发育与含气星之间矢系。结果表明：页岩中石英、长石和碳酸盐岩含虽高，岩石的泊松比低、杨氏模虽高，脆性大，容易在夕I力作用下形成天然裂缝和诱导裂缝，其发育程度一般与页岩中脆性矿物的含呈呈正相尖尖系。高有机碳含垂或异常高压页岩裂缝发育。裂缝发

8、育程度与有机磺含量尖系可以划分为4类。