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南薇西盆地重磁场特征及油气资源远景

冯旭亮 刘斌

冯旭亮, 刘斌, 2019. 南薇西盆地重磁场特征及油气资源远景. 地质力学学报, 25 (1): 105-114. DOI: 10.12090/j.issn.1006-6616.2019.25.01.010
引用本文: 冯旭亮, 刘斌, 2019. 南薇西盆地重磁场特征及油气资源远景. 地质力学学报, 25 (1): 105-114. DOI: 10.12090/j.issn.1006-6616.2019.25.01.010
FENG Xuliang, LIU Bin, 2019. GRAVITY AND MAGNETIC FIELD CHARACTERISTICS AND HYDROCARBON PROSPECTS OF THE NANWEIXI BASIN. Journal of Geomechanics, 25 (1): 105-114. DOI: 10.12090/j.issn.1006-6616.2019.25.01.010
Citation: FENG Xuliang, LIU Bin, 2019. GRAVITY AND MAGNETIC FIELD CHARACTERISTICS AND HYDROCARBON PROSPECTS OF THE NANWEIXI BASIN. Journal of Geomechanics, 25 (1): 105-114. DOI: 10.12090/j.issn.1006-6616.2019.25.01.010

南薇西盆地重磁场特征及油气资源远景

doi: 10.12090/j.issn.1006-6616.2019.25.01.010
基金项目: 

自然资源部海底矿产资源重点实验室基金 KLMMR-2017-B-05

陕西省自然科学基础研究计划 2018JQ4034

国家自然科学基金 41804125

详细信息
    作者简介:

    冯旭亮(1989-), 男, 博士, 讲师, 主要从事重、磁勘探方法技术及综合地球物理解释研究与教学工作。E-mail:fxlchd@vip.163.com

  • 中图分类号: P631

GRAVITY AND MAGNETIC FIELD CHARACTERISTICS AND HYDROCARBON PROSPECTS OF THE NANWEIXI BASIN

  • 摘要: 结合南薇西盆地及邻区的重、磁力异常特征分析与综合反演,文章对该区油气有利远景区进行了预测。南薇西盆地北部坳陷和北部隆起以高重高磁特征为主,火山活动强烈。中部坳陷、南部隆起及南部坳陷的北部表现为整体低重、低磁背景上的局部团块状高重、高磁异常,为火山岩与碳酸盐台地的综合反映。南薇西盆地新生界厚度呈北东向条带状薄厚相间的特征,南部坳陷新生界厚度最大,中部坳陷次之。盆地北部处于莫霍面隆起区,而南部莫霍面相对较深,为减薄型陆壳的特征。北部坳陷和北部隆起居里面整体较浅,可能与南海扩张引起岩石圈的强烈伸展减薄、地幔物质上侵有关。中部坳陷和南部隆起的居里面明显浅于南部坳陷,表明中部坳陷和南部隆起的热活动强于南部坳陷。重磁场特征及其反演结果与石油地质特征表明,南薇西盆地的中部坳陷、南部隆起及其西南盆地外围的区域应为盆地最好的油气远景区,其次为南部坳陷,北部坳陷和北部隆起油气潜力不大。在油气远景区内,局部团块状、等轴状的重力高异常区部分可能为碳酸盐台地,生物礁较为发育,应为未来的勘探目标。

     

  • 图  1  南薇西盆地区域位置图

    Figure  1.  The location of the Nanweixi Basin

    图  2  南薇西盆地构造单元划分图

    Figure  2.  The tectonic units of the Nanweixi Basin

    图  3  南薇西盆地及邻区自由空间重力异常图

    Figure  3.  The free air gravity anomaly in the Nanweixi Basin and its adjacent area

    图  4  南薇西盆地及邻区均衡重力异常图

    Figure  4.  The isostatic gravity anomaly in the Nanweixi Basin and its adjacent area

    图  5  南薇西盆地及邻区剩余均衡重力异常图

    Figure  5.  The residual isostatic gravity anomaly in the Nanweixi Basin and its adjacent area

    图  6  南薇西盆地及邻区磁力ΔT异常图

    Figure  6.  The magnetic ΔT anomaly in the Nanweixi Basin and its adjacent area

    图  7  南薇西盆地及邻区化极磁力异常图

    Figure  7.  The magnetic anomaly reduced to the pole in the Nanweixi Basin and its adjacent area

    图  8  南薇西盆地及邻区剩余化极磁力异常图

    Figure  8.  The residual magnetic anomaly reduced to the pole in the Nanweixi Basin and its adjacent area

    图  9  南薇西盆地及邻区新生界厚度图

    Figure  9.  Thickness of Cenozoic in the Nanweixi Basin and its adjacent area

    图  10  南薇西盆地地震解释剖面图(据文献[3])

    Figure  10.  Regional seismic interpreting profile in the Nanweixi Basin (after reference [3])

    图  11  南薇西盆地及邻区莫霍面深度图

    Figure  11.  Moho depth in the Nanweixi Basin and its adjacent area

    图  12  南薇西盆地及邻区居里面深度图

    Figure  12.  Curie depth in the Nanweixi Basin and its adjacent area

    图  13  南薇西盆地油气远景区预测图

    Figure  13.  The predicted potential hydrocarbon prospect region of the Nanweixi Basin

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  • 收稿日期:  2018-10-18
  • 修回日期:  2018-12-21
  • 刊出日期:  2019-02-01

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