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时频电磁井震联合建模反演探测深部火山岩储层内幕结构: 渤海湾盆地LD地区实例研究

索孝东 董卫斌 石东阳 李悦正

索孝东, 董卫斌, 石东阳, 李悦正. 时频电磁井震联合建模反演探测深部火山岩储层内幕结构: 渤海湾盆地LD地区实例研究[J]. 地质科技通报, 2021, 40(5): 1-10. doi: 10.19509/j.cnki.dzkq.2021.0501
引用本文: 索孝东, 董卫斌, 石东阳, 李悦正. 时频电磁井震联合建模反演探测深部火山岩储层内幕结构: 渤海湾盆地LD地区实例研究[J]. 地质科技通报, 2021, 40(5): 1-10. doi: 10.19509/j.cnki.dzkq.2021.0501
Suo Xiaodong, Dong Weibin, Shi Dongyang, Li Yuezheng. Inversion of time-frequency electromagnetic well seismic modeling to probe the inner structure of deep volcanic reservoir: A case study of LD area in Bohai Bay Basin[J]. Bulletin of Geological Science and Technology, 2021, 40(5): 1-10. doi: 10.19509/j.cnki.dzkq.2021.0501
Citation: Suo Xiaodong, Dong Weibin, Shi Dongyang, Li Yuezheng. Inversion of time-frequency electromagnetic well seismic modeling to probe the inner structure of deep volcanic reservoir: A case study of LD area in Bohai Bay Basin[J]. Bulletin of Geological Science and Technology, 2021, 40(5): 1-10. doi: 10.19509/j.cnki.dzkq.2021.0501

时频电磁井震联合建模反演探测深部火山岩储层内幕结构: 渤海湾盆地LD地区实例研究

doi: 10.19509/j.cnki.dzkq.2021.0501
基金项目: 

国家重点研发计划项目"多学科地球物理联合解释与多元信息智能预测技术" 2018YFC0603605

详细信息
    作者简介:

    索孝东(1965-), 男, 高级工程师, 主要从事油气勘探研究。E-mail: suoxd@sina.com

  • 中图分类号: P618.4

Inversion of time-frequency electromagnetic well seismic modeling to probe the inner structure of deep volcanic reservoir: A case study of LD area in Bohai Bay Basin

  • 摘要: 盆地深部火山岩储层地震受能量屏蔽影响反射杂乱,使得火山岩油气藏的勘探非常困难。针对深部火山岩储层多期叠置的复杂内幕结构,研究了最优偏移距、激发周期窗口的时频电磁采集技术和时频电磁井震联合建模反演及电性节律变化火山岩期次解释技术,有效提高了该方法的深层分辨率和对深层目标的识别能力。在渤海湾盆地LD地区的研究应用效果明显,结果揭示红星构造带沙三段火山岩喷发自下而上表现出"弱-强-强-弱-弱"的"两强三弱"的特征,发育两个火山岩喷发机构,共同控制了5个期次的火山岩储层相带分布;桃园构造带沙三段各期次火山岩喷发强度明显减弱,仅发育一个火山岩喷发机构,除期次3火山岩储层相带分布范围相对较大外,其他期次火山岩主要局限分布于火山口附近,以爆发相为主,规模明显减小。后续钻探结果证实时频电磁揭示的火山岩储层分布正确,并为该区油气大发现提供了有力支撑,为探测类似的复杂目标提供了成功范例与技术方法。

     

  • 图 1  LD研究区位置图(a)和TFEM测线布设图(b)

    Figure 1.  Location of LD study area (a) and TFEM line layout map (b)

    图 2  LD研究区沙三段不同岩性测井电阻率散点图

    Figure 2.  Logging resistivity scatter diagram of different lithologies in Es3 member in LD study area

    图 3  LD研究区沙三段火山岩沉积模型(a)及正反演结果(b)

    Figure 3.  Sedimentary model (a) and forward and inverse results (b) of volcanic rocks in Es3 member in LD study area

    图 4  偏移距与深层目标异常响应模拟关系

    N.新近系;E3d.东营组;E2-3s.沙河街组;E1f.房身泡组

    Figure 4.  Simulation relationship between offset and deep target anomaly response

    图 5  不同周期激发纵向电导曲线

    1, 2, 3, 4为观测点编号

    Figure 5.  Longitudinal conductance curves of excitation at different periods

    图 6  LDTFEM-05测线自由反演(a)与井震联合建模反演(b)结果对比

    Figure 6.  Comparison of free inversion result (a) and well seismic joint modeling inversion result (b) of Line LDTFEM-05

    图 7  LDTFEM-05测线地震剖面(a)、电阻率反演剖面及地质解释(b)

    Figure 7.  Seismic profile (a), resistivity inversion profile and geological interpretation (b) of Line LDTFEM-05

    图 8  LDTFEM-03测线电阻率反演剖面及地质解释(Ng.馆陶组)

    Figure 8.  Resistivity inversion profile and geological interpretation of Line LDTFEM-03

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