| 瞬变电磁法大定源回线斜阶跃波响应计算 |
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| 引用本文： | 刘正,杨生.瞬变电磁法大定源回线斜阶跃波响应计算[J].石油地球物理勘探,2011(2):326-330,164. |
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| 作者姓名： | 刘正 杨生 |
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| 作者单位： | 昆明理工大学;中国有色金属矿产地质调查中心; |
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| 摘 要： | 为了更准确地计算全区视电阻率,本文推导出瞬变电磁法中发射电流为斜阶跃波条件下,大定源回线装置的感应电动势解析表达式。该方法可在计算大定源回线全区视电阻率时,消除关断时间的影响,减小理论响应值与实测响应值之间的误差,同时避开了数值积分的近似运算,提高了计算精度和计算效率。理论和实际应用实例表明,此法所具有的优点是瞬变电磁其他计算方法不能相比的。
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| 关 键 词： | 瞬变电磁法 大定源回线 感应电动势 斜阶跃波 |
Computations of ramp turn-off response of a large fixed rectangle transmitting loop |
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| Liu Zheng, Yang Sheng..Kunming University of Science , Technology,Kunming,Yunnan,China.China Nonferrous Metals Resource Geological Survey,Beijing,China.Computations of ramp turn-off response of a large fixed rectangle transmitting loop[J].Oil Geophysical Prospecting,2011(2):326-330,164. |
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| Authors: | Liu Zheng Yang ShengKunming University of Science Technology Kunming Yunnan ChinaChina Nonferrous Metals Resource Geological Survey Beijing China |
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| Affiliation: | Liu Zheng1,2 and Yang Sheng2.1.Kunming University of Science and Technology,Kunming,Yunnan,650093,China2.China Nonferrous Metals Resource Geological Survey,Beijing,100012,China |
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| Abstract: | In order to accurately calculate all-time apparent resistivity,the analytic formula of the transient electromagnetic response for ramp turn-off of a large fixed rectangle transmitting loop is derived in the article.During calculations of apparent resistivity,effects of ramp turn-off can be revised and approximations of numerical integration can be avoided.So the calculation precision will be improved greatly and computer time will be less.Calculations using the analytic formula show its special advantage by... |
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| Keywords: | transient electromagnetic method large fixed rectangle transmitting loop induced electromotive force ramp turn-off |
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