| 成岩作用对洪浩尔舒特凹陷白垩系储层质量的影响 |
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| 引用本文： | 潘 荣,朱筱敏,张明君,王星星,张剑锋,臧晓华.成岩作用对洪浩尔舒特凹陷白垩系储层质量的影响[J].高校地质学报,2015,21(4):634. |
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| 作者姓名： | 潘 荣 朱筱敏 张明君 王星星 张剑锋 臧晓华 |
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| 摘 要： | 洪浩尔舒特凹陷白垩系砂岩储层具有非均质性强、不同沉积背景下储层物性演化有差异、有利储层预测难的特点。 在对该区白垩系砂岩储层宏观沉积背景研究的基础上，利用岩石薄片、铸体薄片观察及岩心精细描述等资料，对洪浩尔舒 特凹陷白垩系砂岩储层的成岩作用及其对储层物性的影响进行了探讨。结果表明：研究区储层物性演化明显受埋藏-成岩 作用事件的影响，埋藏压实作用是导致砂岩部分原生孔隙丧失的主要原因；胶结作用对砂岩物性降低也具有一定影响；中 成岩阶段阿尔善组烃源岩成熟所排出的酸性孔隙流体是形成次生孔隙及导致砂岩储层物性改善的主要介质；缓坡带辫状河 三角洲相砂岩粒度偏细，分选好，杂基含量低，孔隙流体容易进入，形成溶蚀次生孔隙，为有利储层发育相带；而凹陷中 部滑塌浊积扇辫状水道砂岩体中孔隙衬里绿泥石胶结物的存在有效抑制了石英的次生加大，使得一部分原生粒间孔隙得以 保存。故而勘探中需注意压实作用及胶结作用对储层的不利影响，重点寻找辫状河三角洲砂体中溶蚀次生孔隙发育带及滑 塌浊积扇辫状水道砂体中绿泥石薄膜发育带等有利储层发育带。
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| 关 键 词： | 洪浩尔舒特凹陷 白垩系 砂岩储层 成岩作用 物性演化 |
TheDiageneticImpactonReservoir-qualityEvolutionofthe CretaceousSandstonesoftheHonghaoershuteDepression |
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| PANRong,ZHUXiaomin,ZHANGMingjun,WANGXingxing,ZHANGJianfeng,ZANGXiaohua.TheDiageneticImpactonReservoir-qualityEvolutionofthe CretaceousSandstonesoftheHonghaoershuteDepression[J].Geological Journal of China Universities,2015,21(4):634. |
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| Authors: | PANRong ZHUXiaomin ZHANGMingjun WANGXingxing ZHANGJianfeng ZANGXiaohua |
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| Abstract: | Cretaceoussandstonesarecharacterizedbytheheterogeneity,thedifferentporosityevolutionprocessofdifferentdeposition settingandthedifficultyofthereservoirpredictioninHonghaoershuteDepression.Basedonthestudyofdepositionalcharacteristicsof theCretaceoussandstones,variousmethods,suchascorethinsection,castthinsectionandcoreobservation,areusedtosystematically studythediagenesisanditsinfluencesontheporosityevolutionprocess.Thereservoirs-qualityevolutionisstronglyinfluencedbythe burialhistoryanddiageneticeventsintheCretaceousofthemiddlesub-sagoftheHonghaoershuteDepression.Burialcompactionis themainfactorcausingthelossofporosityforthesandstones.Thecementsalsohaveaneffectonreducingthereservoirqualityofthe sandstones.Theacidicliquidrelatedtothehydrocarbon-expulsionoftheAershanFormationsourcerocksduringmesodiagenesis,have resultedindissolutionofthedetritalgrainsandcontributedabetterretentionofreservoirqualitytothesandstones.Thesandstonesof
thebraideddeltaarecharacterizedbyfinegrainsize,wellsortedandlowmatrixcontents.Theporefluidmaybeflowingintothepore spacesoftherock,whichleadstotheformationofsecondaryporosity.Thinchloritefilmarounddetritalgrainspreventedpartofquartz overgrowth,whichresultedinapartofprimaryporepreservationinthesandstonesoftheslumpturbiditefan.Attentionshouldbepaid to both the negative effects of compaction and cementation on the reservoirs and the positive effects of secondary porosity and pore-liningchloritecementindifferentsedimentarybackgrounds. |
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| Keywords: | HonghaoershuteDepression Cretaceous sandstonereservoir diagenesis reservoir-quailtyevolution |
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