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Focusing type phase dielectric well logging method and instrument thereof

A focused and phase-based technology, applied in electrical/magnetic detection for well logging records, can solve problems such as inability to measure oil and gas information in deep undisturbed formations, shallow detection depth, etc.

Inactive Publication Date: 2003-10-22
邓友明
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  • Abstract
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  • Application Information

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Problems solved by technology

The disadvantage of this method is that the detection depth is too shallow to measure the oil and gas information of deep undisturbed formations

Method used

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  • Focusing type phase dielectric well logging method and instrument thereof
  • Focusing type phase dielectric well logging method and instrument thereof
  • Focusing type phase dielectric well logging method and instrument thereof

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Embodiment Construction

[0012] The theoretical basis of the present invention is to regard the measured ground as an equivalent circuit of parallel resistors and capacitors as shown in FIG. 1.

[0013] The logging method used in the present invention is to generate a high-frequency power supply with a frequency of more than 500HZ through special equipment (recommended frequency is 8960HZ), and the high-frequency current enters the formation in the traditional focusing logging method after passing through the sampling resistor to measure the complex resistivity of the formation The modulus value and the phase change value of current and voltage determine the dielectric constant of the formation through the relationship between the phase change and the dielectric constant.

[0014] The first scheme of focused phase permittivity logging:

[0015] When using the above method to log, use the logging tool shown in Figure 3, including: high-frequency signal source 1, high-frequency current source 2, sampling re...

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Abstract

The invention refers to a method of measuring stratum phase dielectric constant in the well in the oil and geologic field and the well measuring apparatus. The method supplies high-frequency focusingcurrent to the stratum to measure the stratum complex resistivity mode value and phase, according to the known formula calculates multiple useful geologic parameters such as the stratum resistivity, the high-frequency dielectric constant and the high-frequency capacitivity; the apparatus consists of high-frequency signal source, high-frequency current supply, sampling resistance, focusing probe, current, voltage and phase measuring circuits, transmission channel and ground computing system. It can visually and accurately measure the information of the oil and gas in the deep and original-state stratum.

Description

Technical field: [0001] The invention relates to a measuring method and a measuring instrument for measuring the phase dielectric constant of the formation in a well in the fields of petroleum and geology. Background technique: [0002] In the prior art, the method of measuring the phase permittivity of the formation is to measure the phase change during the propagation of microwave energy along the well axis, and determine the permittivity of the formation through the relationship between the phase change and the permittivity. The disadvantage of this method is that the detection depth is too shallow to measure the oil and gas information of deep undisturbed formations. Summary of the invention: [0003] The purpose of the present invention is to provide a method and a measuring instrument for measuring phase permittivity with a deep detection depth. The method and instrument can accurately measure the phase permittivity and multiple parameters of the deep undisturbed stratum, ...

Claims

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Application Information

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IPC IPC(8): G01V3/24
Inventor 邓友明
Owner 邓友明
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