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Rock micro-electric scanning imaging system and imaging method

A technology of scanning imaging and rock, applied in radio wave measurement system, electric/magnetic exploration, re-radiation of sound waves, etc., can solve the problems of large divergence of measurement current, abnormal resistivity, and small number of button electrodes.

Inactive Publication Date: 2007-05-02
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] There are some deficiencies in the logging of the existing micro-resistivity imagers for full-bore formations. In their work, they actually measure the distribution of resistivity anomalies within the detection range near the button electrode, rather than the rock formations on the borehole wall. Therefore, the full-bore formation micro-resistivity imager cannot effectively and accurately obtain the distribution parameters of rock formation fractures
[0006] Because the plates of the full-bore formation micro-resistivity imager have radians, the measured current has a large divergence, and the number of button electrodes on each plate is small, so the full-bore formation micro-resistivity imager Inability to perform relevant measurements in the laboratory on known small-sample models of rocks

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  • Rock micro-electric scanning imaging system and imaging method

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Embodiment Construction

[0028] The rock microelectric scanning imaging system of the present invention is composed of a computer, a signal generating device, an electrode plate and its upper electrode, a return plate, an interface circuit and other parts connected in sequence, and Fig. 1 is a rock microelectric scanning imaging system of the present invention The block diagram of the specific embodiment, the system computer 1 and the signal source 2 are connected by the general parallel interface bus GPIB bus, the return flow plate and the electrode plate 3 are connected with the output terminal of the signal source 2 by common wires, and the electrode plate Common electric wires are used to connect the electrodes on the top and the input end of the interface circuit 4, and ordinary electric wires are used to connect the output end of the interface circuit 4 and the signal input end of the computer 1.

[0029] The electrodes are arranged on the electrode plate. The shape, size, distance and arrangemen...

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Abstract

An imaging method of rock by micro-electric scanning includes processing sample to be saturated conductive fluid and fixing sample between return polar plate and electrode polar plate, sending out measurement signal by signal generation unit and collecting current data of each electrode by system the displaying said current data after normalization treatment and image reconstruction treatment is carried out on said current data by system. The system used for realizing said method is also disclosed.

Description

technical field [0001] The present invention relates to a rock microelectronic scanning imaging system and imaging method, in particular to a rock microelectric scanning imaging that uses rock samples to provide back calculation basis for real fracture width calculation basis for imaging instruments on the well site in oil and gas exploration Systems and imaging methods. Background technique [0002] In oil and gas exploration, it is necessary to conduct corresponding surveys on the physical and chemical properties of the local geological rock formations, so as to provide sufficient geological data basis for future mining work. [0003] For the research on the distribution of rock fractures in well logging, the full-bore formation micro-resistivity imager (FMI) is usually used to directly survey on the well site. [0004] The key components of the full-bore formation micro-resistivity imager are four pushing arms that are perpendicular to each other and push against the wel...

Claims

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Application Information

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IPC IPC(8): G01N27/02G01V3/00
Inventor 柯式镇
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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