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Method for Continuous Measurement of Resistivity of Variable Line Source

A measurement method and resistivity technology, applied in the field of electrical exploration, can solve problems such as wellbore collapse

Active Publication Date: 2018-06-19
张鑫
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  • Abstract
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  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a continuous measurement method of variable line source resistivity to solve hidden dangers such as well wall collapse caused by moving the transmitting electrode or receiving electrode in the wellbore, and to realize the continuous measurement of the longitudinal resistivity of the measuring points around the wellbore. Measurement, that is, to obtain technical problems such as resistivity profile curve

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  • Method for Continuous Measurement of Resistivity of Variable Line Source
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  • Method for Continuous Measurement of Resistivity of Variable Line Source

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Embodiment Construction

[0059] The method for continuously measuring the resistivity of the variable line source of the present invention is to use the continuously lengthening drilling tool or the wire in the drilling hole as an emitting electrode. With the continuous lengthening of the electrode, the charging conductor is constantly increasing from top to bottom. The resistivity of the increased charging conductor is not a constant, so the change of the potential difference is continuously measured at the ground M and N measuring points, and the resistivity value of the charging body at different depths will be obtained, that is, the longitudinal resistivity curve , thus solving the heterogeneity description of the charging body in the longitudinal direction.

[0060] The present invention innovatively proposes to use the continuously lengthening drilling tool in the drilling hole (or the wire in the drilling hole) as a transmitting electrode, and as the electrode is continuously lengthening, the ch...

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Abstract

The present invention discloses a modified line source resistivity continuous measurement method. Continuously prolonged wires in a drilling tool or a drill hole in a drill hole are taken as an emission electrode, a charging conductor is continuously increased from up to down with the continuously prolonged electrode, the increased resistivity of the charging conductor is not a constant, so that the changing of the potential differences is continuously measured at an M measurement point and an N measurement point on the ground to obtain the resistivity values of a charging body at different depths, namely a vertical resistivity curve so as to solve the heterogeneity description of the charging body on the vertical direction. The modified line source resistivity continuous measurement method solves the technical problem of the hidden dangers such as hole-wall collapsing caused by the mobile emission electrode and the receiving electrode in the well hole and realizes the continuous measurement of the vertical resistivity of measurement points around a well hole, namely obtain the resistivity profile curve.

Description

technical field [0001] The invention relates to the technical field of electrical prospecting. Background technique [0002] The current status of the primary field basic theory, measurement method and corresponding mathematical model of the traditional charging method measurement technology is as follows: [0003] Russian geophysicist: Conducted a comprehensive study on the "well-ground field IP method". It arranges one transmitting electrode near the wellhead, and the other is distributed above and below the research target twice, and emits alternating square wave current to the underground, and the ground (dipole) receives the potential difference related to the change of the transmitting frequency. and phase value signals. Practice shows that the obtained parameters such as conductivity, resistivity, polarization phase and polarization phase difference of the target layer can accurately determine the boundary range of the reservoir and the oil-bearing difference of dif...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/20
CPCG01V3/20
Inventor 张鑫
Owner 张鑫