Hydrate measuring device for resistivity of angle ring electrode

Abstract

The utility model discloses an angle ring electrode resistivity hydrate measuring device, which comprises a probe rod and a probe rod array, the probe rod comprises a probe rod outer part and a probe rod inner part, the probe rod outer part comprises a conical tip probe, an angle ring electrode, a probe rod body, an outer cabin and a first cable, and the probe rod inner part comprises a multi-way switch, an inner lead and an electronic cabin. The feeler lever array comprises a plurality of feeler levers, a second cable and a feeler lever support. According to the hydrate measuring device for the resistivity of the angle ring electrodes, the angle ring electrode feeler levers are matched for use, so that the measuring precision can be improved, and the feeler lever array is matched with the angle ring electrode resistivity feeler levers for use; the resistivity measured by the regular polygon central point probe rod is compared with the resistivity value measured at the corresponding position of each vertex probe rod, so that the nonuniformity of hydrate generation and decomposition and the gas leakage and diffusion condition can be accurately measured.

Description

Technical Field

[0001] The utility model relates to the technical field of seabed in-situ natural gas hydrate measurement, in particular to a hydrate measurement device for the resistivity of an angle ring electrode. Background Art

[0002] Natural gas hydrates are recognized as the most promising clean and efficient energy in the world, and the attention and importance paid to natural gas hydrates are constantly increasing worldwide. There are a large number of natural gas hydrate resources in my country's sea areas. In order to better explore the occurrence and distribution of natural gas hydrates and lay the foundation for their rational development in the future, resistivity is currently widely used in the study of natural gas hydrate reservoirs with its highly sensitive electrical response. Bubbles and natural gas hydrates will cause abnormal increase in sediment resistivity. By arranging resistivity probes in a certain arrangement in the area to be monitored, the resistivity values ​​in the horizontal or vertical direction at a certain depth in the area are measured, thereby obtaining a three-dimensional resistivity distribution map of the measurement area, and judging the distribution of hydrates and bubbles by resistivity anomalies.

[0003] The current resistivity measurement devices and methods cannot accurately measure the heterogeneity of hydrate formation and decomposition in seafloor sediments, resulting in large errors in hydrate saturation estimation, which is not conducive to the development and utilization of hydrate resources. The current patent comparison analysis of resistivity measurement probes and detection methods is as follows:

[0004] Invention patent CN202011258781.6, a spiral electrode resistivity probe and its monitoring method. The invention discloses a spiral electrode resistivity probe and its monitoring method, which is composed of a cone-tip probe, a probe body composed of several spiral electrode modules, a probe tail end, an electrode reset device and a penetration device. The invention uses an electrode reset device to enable the probe to switch between penetration mode and measurement mode. When the probe reaches the measurement position, the spiral electrode is converted into a ring electrode, so that the resistivity in the vertical direction can be measured. The device has a simple structure and a clever design. However, its use environment is mainly soil resistivity measurement. The penetration method is that the spiral electrode rotates to penetrate the soil, and when switching from the penetration mode to the measurement mode, the spiral electrode on the outer surface of the probe is deformed into a ring electrode. This series of processes causes a large disturbance to the soil near the outer surface of the probe, which has a great damage to the in-situ measurement environment and is not suitable for use in the seabed environment.

[0005] Invention patent CN202210186613.3, a method for in-situ measurement of the vertical distribution range of seabed bubble-type shallow gas. The invention discloses a method for in-situ measurement of the vertical distribution range of seabed bubble-type shallow gas. The device consists of a top cabin, a probe rod body, a probe body, an electrode sequence, a counterweight, a wire, a battery compartment and a hook; the electrode sequence is an annular electrode array embedded in the outer surface of the probe rod and arranged in a vertical direction. The invention applies the highly sensitive electrical response of resistivity, and uses an annular electrode array to measure the resistivity of sediments and bubble-type shallow gas will increase the resistivity of sediments, and analyzes whether the measured resistivity and resistivity change ratio are abnormal, thereby realizing in-situ and rapid measurement of seabed bubble-type shallow gas. The device can determine the existence of vertical bubbles, but because it uses annular electrodes, the abnormal resistivity value can only determine the presence of bubbles or hydrates around it, and cannot accurately judge the uneven distribution of hydrates, and the resolution is low.

[0006] Invention patent CN202210185900.2, a method for in-situ measurement of bubble-type shallow gas content based on a point electrode probe. The invention discloses a method for in-situ measurement of the content of bubble-type shallow gas in the seabed based on a point electrode probe. The device consists of a top cabin, a probe rod body, a probe body, an electrode sequence, a counterweight, a wire, a battery compartment and a hook; the electrode sequence is an array of point electrodes arranged horizontally on the outer surface of the probe. However, the point electrode has poor monitoring ability for the spatial diffusivity of the permeating gas, and it is difficult to monitor the changes in the gas diffusion channel during the formation and decomposition of hydrates. Utility Model Content

[0007] The purpose of the utility model is to provide a hydrate measuring device of angle ring electrode resistivity. The use of multiple angle ring electrode probes can improve the measurement accuracy. The probe array is used in conjunction with the angle ring electrode resistivity probe. By comparing the resistivity measured by the probe at the center point of the regular polygon with the resistivity values ​​measured at the corresponding positions of the probes at each vertex, the unevenness of hydrate formation and decomposition, as well as the gas leakage and diffusion can be accurately measured.

[0008] To achieve the above-mentioned purpose, the utility model provides a hydrate measurement device of angle ring electrode resistivity, including a probe rod and a probe rod array, the probe rod including a probe rod exterior and a probe rod interior, the probe rod exterior including a cone tip probe, an angle ring electrode, a probe rod body, an outer cabin, and a first cable, the probe rod interior including a multi-way switch, internal wires and an electronic cabin, the probe rod array including a plurality of the probe rods, a second cable, and a probe rod bracket.

[0009] Preferably, the cone tip probe and the probe body are sequentially connected to the outside of the probe from bottom to top, and the angle ring electrode, the outer cabin and the first cable are arranged on a straight line along the vertical direction of the probe.

[0010] Preferably, the wires, the multi-way switch and the electronic cabin are arranged from bottom to top inside the probe rod in a number equal to that of the corner ring electrodes.

[0011] Preferably, the probe rod array includes the probe rod, the probe rod bracket and the second cable from bottom to top.

[0012] Preferably, a plurality of angle ring electrodes of equal shape and size may be arranged at the same horizontal position on the probe rod, and the separation angles of two adjacent angle ring electrodes are the same.

[0013] Therefore, the utility model adopts a hydrate measuring device of the resistivity of an angle ring electrode of the above structure,

[0014] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the exterior of a probe rod of an embodiment of a hydrate measuring device for angle ring electrode resistivity of the utility model;

[0016] Figure 2 This is a schematic diagram of the interior of a probe rod of a hydrate measuring device for angle ring electrode resistivity of the utility model;

[0017] Figure 3 It is a schematic diagram of a probe array of an embodiment of a hydrate measurement device for angle ring electrode resistivity of the utility model;

[0018] Figure 4 This is a schematic diagram of the measuring electrode level and the power supply electrode level of an embodiment of a hydrate measurement device for the resistivity of an angle ring electrode of the utility model.

[0019] Reference numerals

[0020] 1. Probe body; 2. Angle ring electrode; 3. Cone tip probe; 4. Outer cabin; 5. First cable; 6. Electronic cabin; 7. Multi-way switch; 8. Internal wire; 9. Second cable; 10. Probe bracket. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0022] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figure 1-4 As shown, a hydrate measuring device for angle ring electrode resistivity includes a probe rod and a probe rod array. The probe rod includes a probe rod exterior and a probe rod interior. The probe rod exterior includes a cone tip probe 3, an angle ring electrode 2, a probe rod body 1, an outer cabin 4, and a first cable 5. The probe rod interior includes a multi-way switch 7, an internal conductor 8, and an electronic cabin 6. The probe rod array includes a plurality of probe rods, a second cable 9, and a probe rod bracket 10.

[0024] The outside of the probe rod is connected with a cone tip probe 3 and a probe rod body 1 in sequence from bottom to top, and there are four corner ring electrodes 2, an outer cabin 4 and a first cable 5 in a straight line along the vertical direction of the probe rod.

[0025] The probe rod is internally provided with internal wires 8, a multi-way switch 7 and an electronic compartment 6, which are equal in number to the angle ring electrodes 2, from bottom to top.

[0026] The probe rod array includes the probe rod, the probe rod bracket 10 and the second cable 9 from bottom to top.

[0027] A plurality of angle ring electrodes 2 of equal shape and size can be arranged at the same horizontal position on the probe body 1, and the separation angles of two adjacent angle ring electrodes 2 are the same.

[0028] Four adjacent angle ring electrodes 2 at the same vertical position along the vertical direction of the probe body 1 can be measured once, the two middle electrodes are measuring electrodes, and the electrodes on both sides are power supply electrodes. The number of angle ring electrodes 2 that can be measured at the same horizontal position of the probe depends on the number of angle ring electrodes 2 at the horizontal position when the probe is designed. The measurement principle is to use the power supply electrode to establish a stable electric potential field in the sediment, observe the potential difference between the two measuring electrodes, and calculate the apparent resistivity between the two measuring electrodes according to the formula.

[0029] Therefore, the utility model adopts a hydrate measuring device of angle ring electrode resistivity with the above structure. The use of multiple angle ring electrode probes can improve the measurement accuracy. The probe array is used in conjunction with the angle ring electrode resistivity probe. By comparing the resistivity measured by the probe at the center point of the regular polygon with the resistivity values ​​measured at the corresponding positions of the probes at each vertex, the unevenness of hydrate formation and decomposition, as well as the gas leakage and diffusion can be accurately measured.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A hydrate measurement device for angle ring electrode resistivity, characterized in that: It includes a probe rod and a probe rod array. The probe rod includes an exterior and an interior. The exterior of the probe rod includes a cone-tip probe, an angle ring electrode, a probe rod body, an outer cabin, and a first cable. The interior of the probe rod includes a multi-way switch, internal wires, and an electronic cabin. The probe rod array includes a plurality of the probe rods, a second cable, and a probe rod bracket.

2. A hydrate measurement device for angle ring electrode resistivity according to claim 1, characterized in that: The cone tip probe and the probe body are connected to the outside of the probe rod in sequence from bottom to top, and the angle ring electrode, the outer cabin and the first cable are arranged on a straight line along the vertical direction of the probe rod.

3. The hydrate measuring device of the angle ring electrode resistivity according to claim 1, characterized in that: The wires, the multi-way switch and the electronic cabin are arranged from bottom to top in the interior of the probe rod in a number equal to that of the corner ring electrodes.

4. The hydrate measuring device of the angle ring electrode resistivity according to claim 1, characterized in that: The probe rod array includes the probe rod, the probe rod bracket and the second cable from bottom to top.

5. The hydrate measuring device of the angle ring electrode resistivity according to claim 1, characterized in that: A plurality of angle ring electrodes of equal shape and size can be arranged at the same horizontal position on the probe rod, and the separation angles of two adjacent angle ring electrodes are the same.

6. The hydrate measuring device of the angle ring electrode resistivity according to claim 1, characterized in that: Four adjacent corner ring electrodes at the same vertical position along the vertical direction of the probe rod can be measured once, the two middle electrodes are measuring electrodes, and the electrodes on both sides are power supply electrodes. The number of angle ring electrodes that can be measured at the same horizontal position of the probe rod depends on the number of angle ring electrodes at the horizontal position when the probe rod is designed.

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