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Focusing type phase dielectric well logging method and instrument thereof

A logging instrument and focusing technology, which is applied in the direction of electrical/magnetic detection for logging records, and can solve the problems of inability to measure oil and gas information in deep undisturbed formations and shallow detection depth.

Inactive Publication Date: 2006-01-25
邓友明
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  • Description
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Problems solved by technology

However, the defect of the existing instruments using this method is that the detection depth is too shallow to measure the oil and gas information of the deep undisturbed formation.

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

[0013] The theoretical basis of the present invention is to regard the stratum to be measured as an equivalent circuit in which resistance and capacitance are connected in parallel as shown in FIG. 1 .

[0014] The logging method adopted in the present invention is to generate a high-frequency power supply with a frequency of 500 Hz or more through special equipment (the recommended frequency is 8960 Hz), and the high-frequency current enters the formation to measure the complex resistivity of the formation through the traditional focused logging method after passing through the sampling resistor Modulus value, current, voltage, and phase change value, and the dielectric constant of the formation is determined through the relationship between the phase change and the dielectric constant.

[0015] The first scheme of focused phase permittivity logging:

[0016] When using the above methods to log wells, the logging instrument shown in Figure 3 is used, including: high-frequency...

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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 focusing current 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 method and a measuring instrument for measuring the phase permittivity of a 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. However, the defect of the existing instruments using this method is that the detection depth is too shallow to measure the oil and gas information of deep undisturbed formations. Contents of the invention [0003] The object of the present invention is to provide a kind of measuring method and the measuring instrument of the phase permittivity of very deep detection depth, use this method and instrument to accurately measure the phase permittivity and multiple paramete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/24
Inventor 邓友明
Owner 邓友明
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