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自然伽马曲线重构波阻抗反演在勘探含铀有利成矿砂体中的尝试

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梁建刚, 秦喜林, 匡海阳, 孙大鹏, 魏剑平, 陈龙. 2023. 自然伽马曲线重构波阻抗反演在勘探含铀有利成矿砂体中的尝试[J]. 中国地质, 50(2): 347-358. doi: 10.12029/gc20200116002
引用本文: 梁建刚, 秦喜林, 匡海阳, 孙大鹏, 魏剑平, 陈龙. 2023. 自然伽马曲线重构波阻抗反演在勘探含铀有利成矿砂体中的尝试[J]. 中国地质, 50(2): 347-358. doi: 10.12029/gc20200116002
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LIANG Jiangang, QIN Xilin, KUANG Haiyang, SUN Dapeng, WEI Jianping, CHEN Long. 2023. An attempt to find favorable uranium-bearing sand bodies by reconstructed wave impedance inversion using natural gamma curve[J]. Geology in China, 50(2): 347-358. doi: 10.12029/gc20200116002
Citation: LIANG Jiangang, QIN Xilin, KUANG Haiyang, SUN Dapeng, WEI Jianping, CHEN Long. 2023. An attempt to find favorable uranium-bearing sand bodies by reconstructed wave impedance inversion using natural gamma curve[J]. Geology in China, 50(2): 347-358. doi: 10.12029/gc20200116002
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自然伽马曲线重构波阻抗反演在勘探含铀有利成矿砂体中的尝试

  • 1.

    中国地质调查局天津地质调查中心, 天津 300170

  • 2.

    中国地质调查局铀等能源地质重点实验室, 天津 300170

  • 3.

    油气资源与勘探技术教育部重点实验室 (长江大学), 湖北 武汉 430100

  • 4.

    山西省地球物理化学勘查院, 山西 运城 044000

  • 5.

    北京多分量地震技术研究院, 北京 100002

  • 基金项目:
    中国地质调查局项目“油气田勘查区砂岩型铀矿调查与勘查示范”（DD20170128-08）资助
详细信息
    作者简介: 梁建刚, 男, 1980年生, 正高级工程师, 主要从事航磁异常查证和铀矿勘查; E-mail: liangjiangang1980@163.com
    通讯作者: 秦喜林, 男, 1988年生, 讲师, 主要从事地震储层预测和岩石物理研究工作; E-mail: xlq_2016@outlook.com

  • 中图分类号: P631.44

An attempt to find favorable uranium-bearing sand bodies by reconstructed wave impedance inversion using natural gamma curve

  • 1.

    Tianjin Center, China Geological Survey, Tianjin 300170, China

  • 2.

    Key Laboratory of Uranium and Other Energy Geology, China Geological Survey, Tianjin 300170, China

  • 3.

    Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education (Yangtze University), Wuhan 430100, Hubei, China

  • 4.

    Geophysical and Chemical Exploration Institute of Shanxi Province, Yuncheng 044000, Shanxi, China

  • 5.

    Beijing Institute of Multicomponent Seismology, Beijing 100002, China

  • Fund Project: Supported by the project of China Geological Survey (No.DD20170128-08)
More Information
    Author Bio: LIANG Jiangang, male, born in 1980, professor of engineering, mainly engaged in aeromagnetic anomaly verification and uranium exploration; E-mail: liangjiangang1980@163.com .
    Corresponding author: QIN Xilin, male, born in 1988, lecturer, mainly engaged in seismic reservoir prediction and petrophysical research; E-mail: xlq_2016@outlook.com

    摘要
  • 研究目的

    在砂岩型铀矿勘查中，利用地震工作手段及传统波阻抗反演，可有效地区分砂、泥岩，却受限于波阻抗差异微小无法区分砂岩中是否含矿。

     研究方法

    为了寻找含铀有利砂体，本次工作尝试了利用对含矿最为敏感的自然伽玛曲线联合声波曲线重构波阻抗，以提高反演结果对储层含铀信息的甄别能力，弥补传统波阻抗反演对含铀砂体和非含铀砂体无差异地球物理响应的缺陷。

     研究结果

    经多个钻探实例验证，该方法确实有效增强了波阻抗反演对岩层属性的描述能力，缩小找矿范围，提高了钻探验证见矿率。

     结论

    自然伽马曲线重构波阻抗值得在利用石油资料二次开发的砂岩型铀矿勘查中推广。

    This paper is the result of mineral exploration engineering.

     Objective

    During the exploration of sandstone-type uranium deposits, the seismic exploration and traditional wave impedance inversion can effectively distinguish sandstone and mudstone, whereas the small difference of wave impedance cannot distinguish whether the sandstone contains uranium.

     Methods

    In order to find favorable uranium-bearing sand bodies, this paper attempts to reconstruct wave impedance by combining acoustic curve with natural gamma curve, which is most sensitive to uranium ore bodies, so as to improve the inversion ability to uranium-bearing reservoir stratum. This work can make up for the defect that the traditional impedance inversion has no significant geophysical difference of uranium-bearing sand bodies and barren sand bodies.

     Results

    It has been verified by several drilling cases, and this method effectively enhances the describing ability of rock properties with wave impedance inversion. It also effectively reduces the scope of prospecting and improves the ore finding rate of drilling verification.

     Conclusions

    Reconstructed wave impedance inversion using natural gamma curve is worthy to be popularized in the exploration of sandstone-type uranium deposits by using petroleum data.
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  • 图 1  测井曲线与岩性敏感性分析

    Figure 1. 

    下载: 全尺寸图片 幻灯片

    图 2  5D901-1井测井曲线重构前后对比

    Figure 2. 

    下载: 全尺寸图片 幻灯片

    图 3  传统波阻抗反演（a）与GR曲线重构阻抗反演（b）分选对比

    Figure 3. 

    下载: 全尺寸图片 幻灯片

    图 4  单井合成地震记录

    Figure 4. 

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    图 5  传统波阻抗反演结果与5D901-1钻孔对比

    Figure 5. 

    下载: 全尺寸图片 幻灯片

    图 6  重构波阻抗后反演结果与5D901-1钻孔对比

    Figure 6. 

    下载: 全尺寸图片 幻灯片

    图 7  重构波阻抗后反演成果的验证孔ZKDX00-01和ZKDX00-03

    Figure 7. 

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收稿日期:  2020-01-16
修回日期:  2020-11-17
刊出日期:  2023-04-25

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