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基于天文周期等时格架预测细粒沉积岩相展布——以鄂尔多斯盆地富县地区三叠系长7段为例

何发岐 朱建辉 齐荣 武英利 缪九军 姜龙燕 王东燕 陈现

何发岐, 朱建辉, 齐荣, 武英利, 缪九军, 姜龙燕, 王东燕, 陈现. 基于天文周期等时格架预测细粒沉积岩相展布——以鄂尔多斯盆地富县地区三叠系长7段为例[J]. 石油实验地质, 2024, 46(5): 927-940. doi: 10.11781/sysydz202405927
引用本文: 何发岐, 朱建辉, 齐荣, 武英利, 缪九军, 姜龙燕, 王东燕, 陈现. 基于天文周期等时格架预测细粒沉积岩相展布——以鄂尔多斯盆地富县地区三叠系长7段为例[J]. 石油实验地质, 2024, 46(5): 927-940. doi: 10.11781/sysydz202405927
HE Faqi, ZHU Jianhui, QI Rong, WU Yingli, MIAO Jiujun, JIANG Longyan, WANG Dongyan, CHEN Xian. Prediction of fine-grained sedimentary lithofacies distribution based on astronomical cycle isochronous lattice: a case study of Triassic Chang 7 member of Fuxian area, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(5): 927-940. doi: 10.11781/sysydz202405927
Citation: HE Faqi, ZHU Jianhui, QI Rong, WU Yingli, MIAO Jiujun, JIANG Longyan, WANG Dongyan, CHEN Xian. Prediction of fine-grained sedimentary lithofacies distribution based on astronomical cycle isochronous lattice: a case study of Triassic Chang 7 member of Fuxian area, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(5): 927-940. doi: 10.11781/sysydz202405927

基于天文周期等时格架预测细粒沉积岩相展布——以鄂尔多斯盆地富县地区三叠系长7段为例

doi: 10.11781/sysydz202405927
基金项目: 

中国石化科技部项目 P22179

中国石化重大项目 P23229

详细信息
    作者简介:

    何发岐(1967—), 男, 博士, 教授级高级工程师, 从事石油地质综合研究及油气勘探开发研究。E-mail: hefq.hbsj@sinopec.com

    通讯作者:

    朱建辉(1970—), 男, 博士, 高级工程师, 从事油气勘探研究。E-mail: zhujh.syky@sinopec.com

  • 中图分类号: TE122.2

Prediction of fine-grained sedimentary lithofacies distribution based on astronomical cycle isochronous lattice: a case study of Triassic Chang 7 member of Fuxian area, Ordos Basin

  • 摘要: 预测陆相不同类型岩相厚度分布是陆相页岩油富集区带优选评价的基础工作,以此开展的不同类型岩相含油条件、储集条件以及可动条件的研究,对靶区优选和水平井段方向部署有着重要的作用。以岩心观察与测井判识为基础,开展测井资料的频谱分析,引入稳定的天文轨道时间周期,进行时空调谐,建立钻井对比的高频层序等时格架,定量计算每个层序旋回内不同类型岩相厚度的平面变化趋势,认识岩相展布规律。针对鄂尔多斯盆地南部富县地区三叠系延长组7段的研究表明,自然伽马测井曲线包括了若干组天文周期信息,其中可以识别出6个完整的稳定405 kyr长偏心率天文周期旋回,以R203井长7段全岩心段观察和测井相特征分析为基础,合理建立高频等时格架进行井间对比。结果表明,泥页岩和纹层页岩主要发育长73亚段到长72亚段的底部旋回地层,细砂岩、粉砂岩在长72亚段中上部到长71亚段底部的Ⅳ—Ⅴ旋回地层中最为发育;井间横向对比表明,早期旋回的泥页岩和纹层页岩岩相广泛分布,旋回Ⅰ时期主要分布在研究区西南部,旋回Ⅱ时期分布在西部和东—东北部,中部地区局部较厚,而Ⅳ—Ⅴ旋回地层的细砂岩厚度分布由北东—南西的沉积体系控制,平面上呈北—北东往南—南西展布,往西南延伸到ZF27—ZF32井一线,形成了长7段3种源储组合类型。其中纹层页岩与细砂岩岩相配置组合为长73亚段中上部与长72亚段中上部—长71亚段下部层系组合,平面上主要分布在富县地区的中部—北、北东部;页岩岩相厚度发育较好的为长73亚段,平面上主要分布在富县地区的北东—东部、西南部区域。

     

  • 图  1  鄂尔多斯盆地三叠系长7段各亚期沉积相和东西向沉积剖面以及研究区长7段地层柱状图

    a-b图据参考文献[14]修改。

    Figure  1.  Sedimentary facies of each sub-stage, east to west sedimentary cross section, and stratigraphic column of Triassic Chang 7 member, Ordos Basin

    图  2  鄂尔多斯盆地富县地区R203井三叠系长7段不同亚段全岩组分三角图

    Figure  2.  Ternary diagram of whole-rock components in different sub-members of Triassic Chang 7 member in well R203 of Fuxian area, Ordos Basin

    图  3  鄂尔多斯盆地南部富县地区R203井自然伽马曲线频谱分析

    Figure  3.  Spectral analysis of natural gamma curves in well R203 of Fuxian area, southern Ordos Basin

    图  4  鄂尔多斯南部富县地区R203井天文周期旋回地层划分

    Figure  4.  Division of cyclic strata based on astronomical cycles in well R203 of Fuxian area, southern Ordos Basin

    图  5  鄂尔多斯盆地富县地区富古6井—中富30井连井剖面

    Figure  5.  Profile of wells FG6 to ZF30 in Fuxian area, Ordos Basin

    图  6  鄂尔多斯盆地富县地区主要旋回地层重要岩相厚度分布预测

    Figure  6.  Predicted thickness distribution of important lithofacies in main cyclic strata in Fuxian area, Ordos Basin

    表  1  鄂尔多斯盆地富县地区R203井长7段岩相识别指标模板

    Table  1.   Lithofacies identification index template for Chang 7 member in well R203 of Fuxian area, Ordos Basin

    表  2  鄂尔多斯盆地富县地区R203井地层频谱分析与天文周期对应关系

    Table  2.   Correlation between stratigraphic spectral analysis and astronomical cycles in well R203, Fuxian area, Ordos Basin

    地层旋回频率 频率比值 周期比值 对应的天文周期时间/kyr 天文周期类型 对应旋回地层数/个 平均旋回地层厚度/m
    0.053 654 1 1 405 长偏心率周期 5.794 635 18.637 931
    0.129 509 2.413 793 0.414 286
    0.197 965 3.689 655 0.271 028 125 短偏心率周期 21.380 2 5.051 402
    0.514 339 9.586 207 0.104 317
    0.740 056 13.827 59 0.072 319 33.8 斜率周期 80.125 81 1.347 880
    0.782 609 14.586 21 0.068 558 22.2 岁差周期 84.521 74 1.277 778
    下载: 导出CSV

    表  3  鄂尔多斯盆地南部R203井长7段不同旋回地层的岩性组合特征

    Table  3.   Lithological combination characteristics in different cyclic strata of Chang 7 member in well R203, southern Ordos Basin

    旋回地层 顶界埋深/m 底界埋深/m 占比/%
    块状细砂岩 层理细砂岩 夹细沙粉砂岩 粉砂岩 泥岩 层理泥页岩 纹层页岩
    587 602.3 9.76 0 16.26 17.89 56.10 0 0
    602.3 621.2 52.63 23.03 5.26 15.79 3.29 0 0
    621.2 640.1 13.25 9.27 33.11 21.19 23.18 0 0
    640.1 659 0 0 0 13.25 78.81 6.62 1.32
    659 678 0 0 0 3.95 0 5.92 90.13
    678 695 0 0 0.79 13.49 14.29 26.98 44.44
    下载: 导出CSV
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  • 收稿日期:  2023-11-08
  • 修回日期:  2024-08-22
  • 刊出日期:  2024-09-28

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