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公开(公告)号：US20080007265A1
公开(公告)日：2008-01-10
申请号：US11855750
申请日：2007-09-14
申请人： James Milne , Jennifer Rust , Chris Sykes , Mark Bennett
发明人： James Milne , Jennifer Rust , Chris Sykes , Mark Bennett
摘要： A submersible electromagnetic (EM) field generator for seafloor electromagnetic surveying comprising an AC to DC converter operable to generate a DC output from an AC input and a switching module operable to generate a waveform driving signal by selectively switching the DC output. The EM field generator also comprises an antenna that is operable to generate an EM field in response to the waveform driving signal. This design approach of using a switched DC source allows square or rectangular wave EM signals to be generated which have sharp transition characteristics and which are substantially independent of the AC input characteristics.
摘要翻译： 一种用于海底电磁测量的潜水电磁场发生器，包括可操作以从AC输入产生DC输出的AC至DC转换器和可操作以通过选择性地切换DC输出来产生波形驱动信号的开关模块。 EM场发生器还包括可操作以响应于波形驱动信号产生EM场的天线。 使用开关式DC源的这种设计方法允许产生具有尖锐跃迁特性且基本上与AC输入特性无关的方波或矩形波EM信号。
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公开(公告)号：US07683625B2
公开(公告)日：2010-03-23
申请号：US11169381
申请日：2005-06-29
申请人： James Milne , Jennifer Rust , Chris Sykes , Mark Bennett
发明人： James Milne , Jennifer Rust , Chris Sykes , Mark Bennett
IPC分类号： G01V3/00
摘要： A submersible electromagnetic (EM) field generator for seafloor electromagnetic surveying comprising an AC to DC converter operable to generate a DC output from an AC input and a switching module operable to generate a waveform driving signal by selectively switching the DC output. The EM field generator also comprises an antenna that is operable to generate an EM field in response to the waveform driving signal. This design approach of using a switched DC source allows square or rectangular wave EM signals to be generated which have sharp transition characteristics and which are substantially independent of the AC input characteristics.
摘要翻译： 一种用于海底电磁测量的潜水电磁场发生器，包括可操作以从AC输入产生DC输出的AC至DC转换器和可操作以通过选择性地切换DC输出来产生波形驱动信号的开关模块。 EM场发生器还包括可操作以响应于波形驱动信号产生EM场的天线。 使用开关式DC源的这种设计方法允许产生具有尖锐跃迁特性且基本上与AC输入特性无关的方波或矩形波EM信号。
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公开(公告)号：US20060001428A1
公开(公告)日：2006-01-05
申请号：US11169381
申请日：2005-06-29
申请人： James Milne , Jennifer Rust , Chris Sykes , Mark Bennett
发明人： James Milne , Jennifer Rust , Chris Sykes , Mark Bennett
IPC分类号： G01V3/08
摘要： A submersible electromagnetic (EM) field generator for seafloor electromagnetic surveying comprising an AC to DC converter operable to generate a DC output from an AC input and a switching module operable to generate a waveform driving signal by selectively switching the DC output. The EM field generator also comprises an antenna that is operable to generate an EM field in response to the waveform driving signal. This design approach of using a switched DC source allows square or rectangular wave EM signals to be generated which have sharp transition characteristics and which are substantially independent of the AC input characteristics.
摘要翻译： 一种用于海底电磁测量的潜水电磁场发生器，包括可操作以从AC输入产生DC输出的AC至DC转换器和可操作以通过选择性地切换DC输出来产生波形驱动信号的开关模块。 EM场发生器还包括可操作以响应于波形驱动信号产生EM场的天线。 使用开关式DC源的这种设计方法允许产生具有尖锐跃迁特性且基本上与AC输入特性无关的方波或矩形波EM信号。
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公开(公告)号：US20060129322A1
公开(公告)日：2006-06-15
申请号：US10521625
申请日：2003-05-30
申请人： Lucy MacGregor , Jennifer Rust , Martin Sinha
发明人： Lucy MacGregor , Jennifer Rust , Martin Sinha
IPC分类号： G01V1/40
摘要： An electromagnetic survey method for surveying an area of seafloor that is thought or known to contain a subterranean hydrocarbon reservoir, comprising obtaining a first survey data set with a vertical electric dipole (VED) antenna for generating vertical current loops and a second survey data set with a vertical magnetic dipole (VMD) antenna for generating horizontal current loops. In an alternative embodiment, the VMD antenna is dispensed with and the horizontal electromagnetic field is derived from the naturally occurring magnetotelluric (MT) electromagnetic field. In another alternative embodiment, the VED data is compared with a background geological model instead of VMD or MT data. The invention also relates to a survey apparatus comprising VED and VMD antennae, to planning a survey using this method, and to analysis of survey data taken using this survey method. The first and second survey data sets allow the galvanic contribution to the detector signals collected at a detector to he independently contrasted with the inductive effects. This is important to the success of using electromagnetic surveying for identifying hydrocarbon reserves and distinguishing them from other classes or structure.
摘要翻译： 一种用于测量被认为或已知含有地下烃储层的海底区域的电磁勘测方法，包括用垂直电偶极子（VED）天线获得第一测量数据集，用于产生垂直电流回路，以及第二测量数据组， 用于产生水平电流回路的垂直磁偶极子（VMD）天线。 在替代实施例中，不需要VMD天线，并且从天然存在的大地电磁（MT）电磁场导出水平电磁场。 在另一替代实施例中，将VED数据与背景地质模型进行比较，而不是VMD或MT数据。 本发明还涉及包括VED和VMD天线的调查装置，使用该方法规划调查，以及使用该调查方法分析调查数据。 第一和第二测量数据集允许对检测器处收集的检测器信号的电流贡献他独立地与感应效应对比。 这对于使用电磁勘探成功识别碳氢化合物储量并将其与其他类别或结构区分开来是很重要的。
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公开(公告)号：US20080105425A1
公开(公告)日：2008-05-08
申请号：US11965439
申请日：2007-12-27
申请人： Lucy MacGregor , Jennifer Rust , Martin Sinha
发明人： Lucy MacGregor , Jennifer Rust , Martin Sinha
摘要： An electromagnetic survey method for surveying an area of seafloor that is thought or known to contain a subterranean hydrocarbon reservoir, comprising obtaining a first survey data set with a vertical electric dipole (VED) antenna for generating vertical current loops and a second survey data set with a vertical magnetic dipole (VMD) antenna for generating horizontal current loops. In an alternative embodiment, the VMD antenna is dispensed with and the horizontal electromagnetic field is derived from the naturally occurring magnetotelluric (MT) electromagnetic field. In another alternative embodiment, the VED data is compared with a background geological model instead of VMD or MT data. The invention also relates to a survey apparatus comprising VED and VMD antennae, to planning a survey using this method, and to analysis of survey data taken using this survey method. The first and second survey data sets allow the galvanic contribution to the detector signals collected at a detector to be independently contrasted with the inductive effects. This is important to the success of using electromagnetic surveying for identifying hydrocarbon reserves and distinguishing them from other classes of structure.
摘要翻译： 一种用于测量被认为或已知含有地下烃储层的海底区域的电磁勘测方法，包括用垂直电偶极子（VED）天线获得第一测量数据集，用于产生垂直电流回路，以及第二测量数据组， 用于产生水平电流回路的垂直磁偶极子（VMD）天线。 在替代实施例中，不需要VMD天线，并且从天然存在的大地电磁（MT）电磁场导出水平电磁场。 在另一替代实施例中，将VED数据与背景地质模型进行比较，而不是VMD或MT数据。 本发明还涉及包括VED和VMD天线的调查装置，使用该方法规划调查，以及使用该调查方法分析调查数据。 第一和第二测量数据集允许对在检测器处收集的检测器信号的电流贡献与感应效应独立对比。 这对于使用电磁勘测来确定碳氢化合物储量并将其与其他类型的结构区分开来的成功至关重要。
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