Method and device for measuring stratigraphic dip by resistivity device with tilt coil
A technology of stratum inclination and inclined coil, which is applied in the field of surveying, can solve the problem that the stratum inclination cannot be measured, and achieve the effect of reducing costs
Inactive Publication Date: 2013-04-03
THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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[0004] The present invention provides a method and device for measuring formation dip angle through resistivity equipment with inclined coils, so as to at least solve the problem that the current formation dip angle cannot be measured by electromagnetic wave propagation resistivity devices with inclined coils in the prior art
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[0027] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0028] An embodiment of the present invention provides a device for measuring formation inclination through resistivity equipment with inclined coils. The following is an introduction to the device for measuring formation inclination through resistivity equipment with inclined coils provided by the embodiments of the present invention.
[0029] Figure 1a It is a structural block diagram of a formation dip measurement device through a resistivity device with a dip coil according to an embodiment of the present invention.
[0030] Such as Figure 1a As shown, the device includes a first acquisition unit 11 , a first calculation unit 12 , a second calculation unit 13 , a second acquisition unit 1...
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The invention discloses a method and a device for measuring a stratigraphic dip by a resistivity device with a tilt coil. The method comprises the following steps: a first magnetic moment and a second magnetic moment are acquired; a first phase difference P1 and a first amplitude ratio A1 are computed; a second phase difference P2 and a second amplitude ratio A2 are computed; a third phase difference P and a third amplitude ratio A are acquired; resistivity R is computed according to P and A; the corresponding relation between R and an azimuth angle of the resistivity device is acquired; and the current stratigraphic dip corresponding to the azimuth angle is determined according to R and the corresponding relation. According to the method and the device disclosed by the invention, because the corresponding relation between the azimuth angle and the resistivity is acquired, an azimuth angle corresponding to an extremum resistivity can be obtained, and the current stratigraphic dip can be obtained according to the azimuth angle corresponding to the extremum resistivity, i.e. the stratigraphic dip is measured without the need of other devices, and the cost is reduced.
Description
technical field [0001] The invention relates to the field of surveying, in particular to a method and device for measuring formation inclination angles through resistivity equipment with inclined coils. Background technique [0002] The electromagnetic wave propagation resistivity device is one of the most basic and important devices in logging while drilling. The electromagnetic wave propagation resistivity device without inclined coils measures conventional formation information without azimuth. The geosteering of this device The function is realized according to the polarization angle phenomenon of the resistivity response when the device is close to the formation boundary, but because there is no orientation, the polarization angle of the same direction appears when the equipment is close to the upper boundary or the lower boundary of the oil layer, so it can only be judged Whether it is close to the boundary, it is impossible to distinguish whether it is an upper bounda...
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Inventor 宋殿光段宝良韩宏克魏少华方辉李郴郭巍
Owner THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP