公开(公告)号：US20070040557A1

公开(公告)日：2007-02-22

申请号：US10549172

申请日：2004-03-19

申请人： Svein Johnstad ,  Fan-Nian Kong ,  Harald Westerdahl

发明人： Svein Johnstad ,  Fan-Nian Kong ,  Harald Westerdahl

IPC分类号： G01V3/18

CPC分类号： E21B47/042 ,  G01F23/284 ,  G01V3/30 ,  Y02A90/344

摘要： A device for monitoring the position of an oil/water contact (OWC, 22) between an oil-continuous fluid (2o) overlying a water-continuous fluid (2w) inside a casing pipe (7), comprising the following features: a transmitter (5) for a generating an electro-magnetic signal (ST), said transmitter (5) provided with electrical energy (GT) from a voltage signal generator (G); said transmitter (5) being arranged inside said oil-continuous fluid (2o) and being above said oil-water contact (22), and being inside said casing pipe (7); said electromagnetic wave signal (ST) for partly propagating downwards from said transmitter (5); said electromagnetic wave signal (ST) for being partly reflected from said oil-water contact (22), and partly reflected by the end of the casing, giving rise to an upward propagating, reflected electro-magnetic signal (SR); a sensor (6) for detecting said reflected electromagnetic signal (SR), said sensor (6) also arranged above said oil-water contact (22), providing a sensor signal (RR) to a receiver (60) for receiving said sensor signal (RR) and further to an analysing device (61) for analysing said sensor signal (RR), e.g. with respect to two-way propagation time or amplitude in order for calculating an elevation level for said oil-water contact (22).

摘要翻译： 一种用于监测覆盖在套管（7）内的水连续流体（2w）的油连续流体（2o）之间的油/水接触（OWC，22）的位置的装置，包括以下特征： 用于产生电磁信号（S SUB T）的发射器（5），所述发射器（5）从电压信号发生器（5）提供电能（G T T T） （G）; 所述发射器（5）布置在所述油连续流体（2o）内并且位于所述油水接触件（22）的上方，并且位于所述套管（7）内; 用于从所述发射器（5）向下部分地传播的所述电磁波信号（S SUB T）; 所述电磁波信号（S SUB T T）用于部分地从所述油 - 水接触（22）反射并部分地被所述壳体的端部反射，从而产生向上传播的反射电磁 信号（S SUB R）; 用于检测所述反射电磁信号的传感器（6），所述传感器（6）还布置在所述油水接触件（22）的上方，提供传感器信号（R SUB R 用于接收所述传感器信号（R SUB R）的接收器（60），并且还用于分析装置（61），用于分析所述传感器信号（R SUB R＆lt; / SUB） >），例如 相对于双向传播时间或幅度，以便计算所述油 - 水接触（22）的高程水平。

公开(公告)号：US20060255809A1

公开(公告)日：2006-11-16

申请号：US10549913

申请日：2004-03-22

申请人： Svein Johnstad ,  Fan-Nian Kong ,  Harald Westerdahl

发明人： Svein Johnstad ,  Fan-Nian Kong ,  Harald Westerdahl

IPC分类号： G01V3/00

CPC分类号： G01V3/30

摘要： A method for monitoring a high-resistivity reservoir rock formation (2) below one or more less resistive formations (3), comprising the following steps: Transmitting an electromagnetic signal (S) propagating from near a seafloor or land surface (1) by means of an electromagnetic transmitter (5) powered by a voltage signal generator (G). The electromagnetic signal (S) propagates from the seafloor (1) and is guided along a conductive string (7) to the high-resistive formation (2), and propagates as a guided-wave electromagnetic signal (S2) at a relatively higher speed (V2) inside the high-resistivity formation (2) than a propagation speed (V3) in the less resistive formations (3). The guided-wave electromagnetic signal (S2) gives rise to an upward refracting electromagnetic signal (R3) having the relatively lower propagation speed (V3) in the less resistive formations (3) and having an exit angle nearer to the normal N to the interface between said high-resistivity formation (2) and the lower-resistivity formation (3), and gives rise to a steeply rising refraction wave front (F3). The refracted electromagnetic wave front (F3) comprising refracted electromagnetic signals (R3) is detected along an array of sensor antennas (6a, 6b, 6c, . . . , 6k, . . . , 6n) along the seafloor, the array having a direction away from the transmitter (5). In a preferred embodiment of the invention, the electromagnetic transmitter (5) comprises an antenna (50) transmitting the electromagnetic signal (S) to an upper end (70 U) of an electrically conductive string (7), e.g. a steel casing or liner, the upper end (70 U) being arranged near said seafloor (1).

公开(公告)号：US20060238200A1

公开(公告)日：2006-10-26

申请号：US10562825

申请日：2004-06-18

申请人： Svein Johnstad

发明人： Svein Johnstad

IPC分类号： G01V3/00

CPC分类号： G01V1/38 ,  G01V1/201 ,  G01V3/08 ,  G01V11/00 ,  G01V11/007 ,  Y02A90/344

摘要： The invention comprises a geophysical sensor apparatus for use under water in the sea, comprising a plurality of seismic sensors (1) for sensing seismic waves associated with underground formations, and a plurality of EM-sensors constituted preferably by electrodes (4) for sensing electromagnetic waves associated with said underground formations. In a preferred receiver cable configuration embodiment of the invention, the geophysical sensor apparatus comprises a seismic receiver cable with a linear array of a plurality of seismic sensors (1) and EM-sensors arranged inside a flexible outer skin (25), with said EM-sensors having electrodes on the outside of said outer skin. The cable is operated on the seafloor by a surface vessel, said vessel towing an electromagnetic transmitter antenna in addition to the seismic source.

摘要翻译： 本发明包括一种用于海洋中的水下的地球物理传感器装置，包括用于感测与地下结构相关的地震波的多个地震传感器（1），以及多个优选由电极（4）构成的EM传感器，用于感测电磁 与所述地下组合有关的波浪。 在本发明的优选的接收器电缆配置实施例中，地球物理传感器设备包括具有多个地震传感器（1）的线性阵列和布置在柔性外皮（25）内的EM-传感器的地震接收器电缆，所述EM 在所述外皮的外侧具有电极的传感器。 电缆通过地面船舶在海底上操作，所述容器除了地震源之外还牵引电磁发射机天线。