| 内蒙查干凹陷下白垩统碎屑岩储层 异常高孔带分布特征与成因分析 |
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| 引用本文： | 魏 巍,朱筱敏,谈明轩,国殿斌,苏 惠,蒋飞虎,赵其磊,薛梦戈.内蒙查干凹陷下白垩统碎屑岩储层 异常高孔带分布特征与成因分析[J].高校地质学报,2015,21(4):664. |
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| 作者姓名： | 魏 巍 朱筱敏 谈明轩 国殿斌 苏 惠 蒋飞虎 赵其磊 薛梦戈 |
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| 摘 要： | 为了解查干凹陷致密背景下优质储集层的形成和分布，文中应用岩心实测孔隙度、测井孔隙度以及铸体薄片等资 料，研究了查干凹陷白垩系巴音戈壁组储层异常高孔带的分布特征及其成因。结果表明，巴音戈壁组储层纵向上发育两个 异常高孔带，深度范围为1900~2300m和2500~3100m，对应平均孔隙度分别为7%和5.2%。平面上，第I异常高孔带储层 埋藏浅，主要分布在中央构造带扇三角洲前缘砂砾岩和细砂岩中，第II异常高孔带储层埋藏较深，主要分布在乌力吉构造 带和额很洼陷的扇三角洲前缘细砂岩中。不同地区异常高孔带成因不同。中央构造带异常高孔带主要受大气水淋滤作用影 响，其次受有机酸作用影响；乌力吉构造带异常高孔带主要受深部酸性热流改造作用影响，热流沿毛西断裂上侵溶蚀储层 中碳酸盐胶结物和长石颗粒等形成大量溶孔；额很洼陷异常高孔带主要与来自深凹区的有机酸溶蚀作用有关。
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| 关 键 词： | 异常高孔带 有机酸 热流体 致密砂岩 巴音戈壁组 查干凹陷 |
DistributionandOriginAnalysisofAnomalouslyHighPorosity ZonesoftheBayingebiFormationintheCretaceousintheChaganSag |
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| WEI Weihu,ZHU Xiaomin,TAN Mingxuan,GUO Dianbin,SU Hui,JIANG Feihu.DistributionandOriginAnalysisofAnomalouslyHighPorosity ZonesoftheBayingebiFormationintheCretaceousintheChaganSag[J].Geological Journal of China Universities,2015,21(4):664. |
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| Authors: | WEI Weihu ZHU Xiaomin TAN Mingxuan GUO Dianbin SU Hui JIANG Feihu |
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| Abstract: | :Inordertoidentifytheformationanddistributionofhigh-qualityreservoirunderconditionsoftightsandstonereservoirs,the distributionsandoriginsoftheanomalouslyhighporosityzonesoftheBayingebiFormationintheCretaceousintheChaganSagwere studiedbyusingthedataofmeasuredporosity,loggingporosity,thinsections,blueepoxyresin-impregnatedthinsectionsandSEM. Theresultsshowthattherearetwoanomalouslyhighporosityzonesatdepthsof1900-2300mand2500-3100m,respectively,withan averageporosityrangeof7%to5.2%.Thefirstanomalouslyhighporosityzoneismainlydistributedinthemiddle-shallowhorizons, andconsistsoffinesandstoneandconglomeratereservoirsthatweredepositedinthefandeltafrontoftheCentraltectoniczone.The secondoneisdistributedinthedeephorizons,andconsistsoffinesandstonereservoirsinthefandeltafrontofWulijitectoniczoneandEhensubsag.Theoriginofanomalouslyhighporosityzonevariesindifferenttectoniczones.Theoriginofhighporosityzoneisrelated totheleachingofmeteoricwaterinCentraltectoniczone,geothermalfluiddissolutioninWulijitectoniczone,andorganicacid dissolutionintheEhensubsag. |
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| Keywords: | Anomalouslyhighporosityzone organicacid geothermalfluid tightsandstone BayingebiFormation ChaganSag |
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