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哥伦比亚Llanos盆地东部油田Carbonera组C5段河道砂岩地震识别与预测

郑连弟 杨江峰 袁联生 杨勤林 冯方 李洋 马永强 胡俊峰

郑连弟, 杨江峰, 袁联生, 等, 2018. 哥伦比亚Llanos盆地东部油田Carbonera组C5段河道砂岩地震识别与预测. 地质力学学报, 24 (3): 391-398. DOI: 10.12090/j.issn.1006-6616.2018.24.03.040
引用本文: 郑连弟, 杨江峰, 袁联生, 等, 2018. 哥伦比亚Llanos盆地东部油田Carbonera组C5段河道砂岩地震识别与预测. 地质力学学报, 24 (3): 391-398. DOI: 10.12090/j.issn.1006-6616.2018.24.03.040
ZHENG Liandi, YANG Jiangfeng, YUAN Liansheng, et al., 2018. SEISMIC IDENTIFICATION AND PREDICTION OF C5 CHANNEL SANDSTONE IN THE CARBONERA FORMATION, LLANOS BASIN, COLOMBIA. Journal of Geomechanics, 24 (3): 391-398. DOI: 10.12090/j.issn.1006-6616.2018.24.03.040
Citation: ZHENG Liandi, YANG Jiangfeng, YUAN Liansheng, et al., 2018. SEISMIC IDENTIFICATION AND PREDICTION OF C5 CHANNEL SANDSTONE IN THE CARBONERA FORMATION, LLANOS BASIN, COLOMBIA. Journal of Geomechanics, 24 (3): 391-398. DOI: 10.12090/j.issn.1006-6616.2018.24.03.040

哥伦比亚Llanos盆地东部油田Carbonera组C5段河道砂岩地震识别与预测

doi: 10.12090/j.issn.1006-6616.2018.24.03.040
基金项目: 

中国石化国际勘探公司项目 BJWINJZ-NGEC-2012003

中国石化国际勘探公司项目 BJWINJZ-NGEC-2013002

详细信息
    作者简介:

    郑连弟(1982-), 女, 博士, 主要研究方向为地震地质学。E-mail:ldzheng01@163.com

  • 中图分类号: P618.13;P631.4

SEISMIC IDENTIFICATION AND PREDICTION OF C5 CHANNEL SANDSTONE IN THE CARBONERA FORMATION, LLANOS BASIN, COLOMBIA

  • 摘要: 哥伦比亚Llanos盆地东部的中新世Carbonera组属于三角洲前缘相沉积。Carbonera组内部的水下分流河道砂体是良好的储层,因此对河道的精细刻画有利于指导下一步的油气勘探和开发。研究通过波动方程波场正演模拟建立了河道砂岩储层的地震识别模式,并利用地震沉积学RGB混频体地层切片以及沿层地震振幅属性对河道的形态、发育期次、以及砂体的平面分布进行了详细的研究。在此基础上,利用约束稀疏脉冲反演和地质统计学反演研究定量描述了河道砂体的孔隙度和厚度。最终对五条有利的河道砂岩岩性圈闭进行了详细的描述,研究区河道的宽度为322~830 m、砂岩最厚可达到35.05 m,这些河道砂体可为有利勘探目标区。区内钻探的W2井证实了该技术方法的有效性和储层描述结果的可靠性,为研究区下步的油气勘探开发提供新方向。

     

  • 图  1  Llanos盆地东部斜坡带Carbonera组地层岩性柱(据文献[9]修改)

    Figure  1.  Lithologic histogram of the Carbonera Group in the eastern slope zone of the Llanos Basin (modified after [9])

    图  2  地震波场正演模拟图

    a—地质模型;b—正演模拟剖面和地质模型叠合图

    Figure  2.  Forward modeling of the seismic wave field

    图  3  过W1和W2井地震剖面图

    Figure  3.  Seismic sections cross well W1 and W2

    图  4  基于RGB混频数据体的地层切片图

    Figure  4.  Stratigraphic slices based on RGB mixing data volume

    图  5  河道平面分布预测图

    (T1沿层向上20 ms, 向下10 ms最大绝对振幅属性图)

    Figure  5.  The prediction map for channel plane distribution

    (The maximum absolute amplitude diagram for T1 along the top 20 ms and down 10 ms)

    图  6  波阻抗和孔隙度反演图(剖面位置见图 5)

    a—波阻抗反演剖面;b—孔隙度反演剖面

    Figure  6.  The inversion charts of impedance and porosity

    图  7  研究区C5-c储层厚度预测图

    Figure  7.  Prediction of C5-c reservoir thickness in the study area

    表  1  地层参数统计表

    Table  1.   Parameters for layers

    层位 Vp/(m/s) Vs/(m/s) ρ/(g/cm3) Z/(g·cm-3·m·s-1)
    C2 2540 1472 2.32 5892.8
    C3 2822 2822 2.35 6631.70
    C3-a 3175 1832 2.20 6985.00
    C4 2674 1547 2.40 6417.60
    C5-a 2931 1691 2.15 6301.65
    C5 2650 1534 2.41 6386.50
    C5-c 3142 1812 2.13 6692.46
    C5-c 2771 1602 2.13 5902.23
    C6 2988 1723 2.42 7230.96
    C7 3048 1758 2.12 6461.76
    注:Vp—纵波速度;Vs—横波速度;ρ—密度;Z—波阻抗
    下载: 导出CSV

    表  2  河道参数统计表

    Table  2.   The statistics parameters of channel sand

    河道编号 河道宽度/m 延伸长度/m 面积/km2 走向
    830 2783 1.31 NE
    556 6509 2.74 NNE
    628 4575 2.48 NNE
    322 2633 0.79 NNE
    543 2361 1.91 NE
    下载: 导出CSV
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  • 收稿日期:  2017-10-10
  • 修回日期:  2018-02-26
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