瞬变电磁波测井三轴感应响应特征
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P631

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Research on triaxial induction response characteristics of transient electromagnetic logging method
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    瞬变电磁波测井的关键在于对不同界面的探测与识别,为提高仪器的灵敏度和探测距离,本文采用时间域瞬变电磁方法,模拟高精度三轴测井装置下的瞬变电磁波响应。结果表明:地层距离接收线圈越远,则异常出现的时间就越晚,对异常的探测越不敏感;通过异常场的响应分析,表明时间域远探测距离可达五十米左右;同时,瞬变电磁波测井响应对线圈的收发距并不敏感,因此可以采用较短的仪器长度达到频率域较长仪器才能做到的远探;瞬变电磁波遇到高阻层时传播速度加快,识别油-水层界面的能力增强。可见瞬变电磁波测井拓展了薄层敏感性测井资料在储层评价方面的应用,对于电磁波测井领域的发展意义重大。

    Abstract:

    The key of transient electromagnetic wave logging lies in the detection and identification to different interfaces. In this thesis, in order to improve the instrument's sensitivity as well as detection distance, the time domain transient electromagnetic method is adopted to simulate the transient electromagnetic wave response under the high-precision triaxial logging device. The results reveal as follows: the farther the stratum is from the receiving coil, the later the anomaly appears, and the less sensitive it is to the detection of anomalies; the response analysis on the anomaly field indicates that the remote detection distance in the time domain can reach about 50 meters; meanwhile, the transient electromagnetic wave logging response is insensitive to the coil's transmit-receive distance. Therefore, a shorter instrument length can be applied to achieve the remote detection that can only be realized by a longer frequency-domain instrument; when the transient electromagnetic wave encounters high resistance, the propagation speed will accelerate, and its ability to identify the oil-water interface will be enhanced. It can be seen that the transient electromagnetic wave logging expands the application of the thin-bed sensitive logging data in reservoir evaluation, and is of great significance to the development of the electromagnetic wave logging.

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引用本文

李赓,史安然,赵宁. 瞬变电磁波测井三轴感应响应特征[J]. 科学技术与工程, 2021, 21(13): 5255-5261.
Li Geng, Shi Anran, Zhao Ning. Research on triaxial induction response characteristics of transient electromagnetic logging method[J]. Science Technology and Engineering,2021,21(13):5255-5261.

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  • 收稿日期:2020-11-04
  • 最后修改日期:2021-02-23
  • 录用日期:2021-01-10
  • 在线发布日期: 2021-05-28
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