Method and device for testing lithologic humidity of full well section in loess area well

Abstract

The invention belongs to the technical field of loess area well lithology testing, and particularly discloses a loess area well whole well section lithology humidity testing method and device, and the device comprises an upper computer with built-in upper computer software, a control box and at least one humidity sensor; a signal acquisition module and a 485 conversion module are arranged in the control box; the signal acquisition module controls starting and ending of signal acquisition actions of the humidity sensor and uploads humidity signals from the humidity sensor to the upper computer through the 485 conversion module. And the upper computer performs voltage-humidity data conversion through upper computer software, and performs further processing to obtain lithologic humidity distribution data of the whole well section in the loess area well. The method can solve the problem that the design scientificity of the excitation well depth is poor due to the fact that quantitative analysis is not carried out in the past, achieves accurate measurement of the excitation well depth humidity in the loess area, is used for scientifically guiding the excitation well depth design and improving the data quality, and is suitable for testing the lithologic humidity in the loess area well.

Description

Technical Field

[0001] The invention belongs to the technical field of lithology testing in wells in loess regions, and relates to a method and a device for testing lithology humidity in a whole well section in a well in a loess region. Background Art

[0002] Loess plateau, also known as loess platform or loess table-shaped plateau, is a flat and wide loess accumulation plateau with valleys cutting around it. Loess plateau is mainly distributed in the western Loess Plateau region in my country.

[0003] In the loess plateau area, the quality of a single shot varies greatly with different well depths. The ideal excitation depth is to place the explosive package in moist loess for excitation. However, the current use of artificial experience to judge moist loess, without quantitative analysis, makes the design of the excitation well depth less scientific. For example, the surface of the loess plateau area in the eastern edge of Hubei is currently covered with thick loess. The dry and loose loess layer with a thickness of 100-200m has caused serious absorption and attenuation of seismic waves, and the signal-to-noise ratio of the excitation data in the loess is low. Summary of the invention

[0004] The purpose of the present invention is to provide a device for testing the lithology humidity of the entire well section in a loess area well, to quantitatively test and analyze the lithology humidity of the entire well section in a loess area well, and to accurately measure the humidity of the deep well in the loess area; Another object of the present invention is to provide a method for testing the lithology and humidity of the entire well section in a well in a loess region by using the above-mentioned lithology and humidity testing device for the entire well section in a well in a loess region.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A device for testing the lithology humidity of the entire well section in a loess region, comprising a control box and at least one humidity sensor, and sensor carriers equal in number to the humidity sensors, wherein the humidity sensors are mounted on the sensor carriers in a one-to-one correspondence; and further comprising a host computer, wherein the host computer software is arranged in the host computer; The control box is equipped with a signal acquisition module and a 485 conversion module; The control signal output end of the signal acquisition module is connected to the control signal input end of the humidity sensor to control the start and end of the humidity sensor signal acquisition action; the signal output end of the humidity sensor is connected to the signal input end of the signal acquisition module, and the humidity signal output end of the signal acquisition module is connected to the signal input end of the host computer through the 485 conversion module; The host computer performs voltage-humidity data conversion through the host computer software, and obtains the lithology-humidity distribution data of the whole well section in the loess area after further processing; The sensor carrier is a detector housing; The humidity sensor is a patch type humidity sensor, the back of which is attached to the outer wall of the corresponding detector housing and the front is exposed; the front refers to the sensitive surface of the humidity sensor, and the back refers to the opposite side of the sensitive surface; The humidity sensor is connected to the main wiring harness through a sensor wiring harness arranged in the housing of its corresponding detector, and the main wiring harness is respectively connected to the signal acquisition module; At least one air bag is arranged on the outer side wall of each detector housing, and the air bag and the humidity sensor attached to the same detector housing are symmetrical with respect to the detector housing; The device for testing the lithology and humidity of the entire well section in a loess region also includes an air pumping device, and the air inlet of the air bag is connected to the air outlet of the air pumping device through an air filling pipe.

[0006] As a limitation, the humidity sensor includes a sensor body, on which a sensor chip and a sensor electrode are mounted; a signal output end of the sensor electrode is connected to a signal input end of the sensor chip.

[0007] A method for testing the lithology humidity of the entire well section in a loess region well is implemented by using the above-mentioned device for testing the lithology humidity of the entire well section in a loess region well. The method comprises the following steps performed in sequence: S1. Arrange the sensor carrier with the humidity sensor installed in the well in the loess area as required, place the detector housing at the target position, inflate the airbag through the air pump, and push the detector housing through the airbag to make the sensitive surface of the humidity sensor fully contact with the soil on the well wall at the target position; S2, controlling the humidity sensor to test the soil humidity at its location through the signal acquisition module in the control box, and the humidity sensor outputs the test data in the form of voltage to the signal acquisition module; S3, the signal acquisition module outputs the received data signal in voltage form to the host computer through the 485 conversion module; S4. The host computer converts the received data into voltage-humidity data through the host computer software, and obtains the lithology-humidity distribution data of the whole well section in the loess area after further processing.

[0008] As a limitation, in the voltage-humidity data conversion process, the voltage format data is converted into humidity percentage format data.

[0009] As a second limitation, after completing step S4, step S5 is further performed. In step S5, the upper computer software prepares a lithology-moisture distribution map of the entire well section in the well according to the lithology-moisture distribution data of the entire well section in the loess area.

[0010] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art: (1) The present invention can solve the problem that the design of the excitation well depth is poorly scientific because the wet loess is judged by artificial experience without quantitative analysis. The method and device designed by the present invention can realize the accurate measurement of the wetness of the excitation well depth in the loess area, which can be used to scientifically guide the design of the excitation well depth and improve the data quality. (2) The method and device of the present invention can effectively improve work efficiency, realize quantitative measurement of loess moisture in the well, ensure that the excitation well depth is below the top interface of moist loess, and improve the quality of excitation single shot data; (3) The humidity sensor in the present invention adopts a patch-type humidity sensor, which is directly pasted on the detector housing, and can make full use of the existing test equipment to arrange the humidity sensor at the target position. At the same time, the patch-type humidity sensor is conducive to full contact with the well wall. Further, an air bag is installed on the outer wall of the detector housing. By inflating the air bag, the detector housing can be pushed to make the humidity sensor closely contact with the soil of the well wall at the target position. The above-mentioned structural arrangement is ingenious, which not only does not increase the difficulty of arranging the detector in the well, but also improves the accuracy of the test results.

[0011] The invention belongs to the technical field of well lithology testing in loess areas, and can quantitatively measure the moisture content of loess in the well and improve the quality of single shot excitation data. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0013] In the attached picture: Figure 1 This is a block diagram of the structural principle of Embodiment 1 of the present invention; Figure 2 Schematic diagram of the structure of the humidity detector in Example 1 of the present invention; Figure 3 This is a schematic diagram of the internal structure of the humidity sensor according to Embodiment 1 of the present invention; Figure 4 1 is a circuit diagram of Embodiment 1 of the present invention; Figure 5 This is the humidity distribution diagram in the well measured in Example 2 of the present invention.

[0014] In the figure: 1. sensor carrier, 2. humidity sensor, 21. sensor body, 22. sensor chip, 23. sensor electrode, 3. sensor harness. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0016] Example 1 A device for testing the lithology and humidity of the entire well section in a loess area well like Figure 1 As shown, this embodiment includes a signal control box and five humidity detectors, and also includes a host computer, in which the host computer software is set.

[0017] like Figure 2 As shown, the humidity detector includes a sensor carrier 1 and a humidity sensor 2 mounted on the sensor carrier 1. In this embodiment, the sensor carrier 1 adopts a detector housing, and the humidity sensor 2 is a patch-type humidity sensor, the back of which is attached to the outer wall of the detector housing after being bonded with a sealant, and the front is exposed; different humidity sensors 2 are correspondingly attached to the outer walls of different detector housings; the front refers to the sensitive surface of the humidity sensor 2, and the back refers to the reverse side of the sensitive surface; each detector housing outer wall is provided with at least one airbag, and the airbag and the humidity sensor 2 attached to the same detector are symmetrical about the detector housing. This embodiment also includes an air pumping device, and the air inlet of the airbag is connected to the air outlet of the air pumping device through an inflation tube.

[0018] The control box is equipped with a signal acquisition module and a 485 conversion module. Figure 4 As shown, the control signal output end of the signal acquisition module is connected to the control signal input end of the humidity sensor 2 to control the start and end of the signal acquisition action of the humidity sensor 2; the signal output end of the humidity sensor 2 is connected to the signal input end of the signal acquisition module, and the humidity signal output end of the signal acquisition module is connected to the signal input end of the host computer through the 485 conversion module. The host computer performs voltage-humidity data conversion through the host computer software, and obtains the lithology humidity distribution data of the whole well section in the loess area after further processing. Specifically, the humidity sensor 2 is connected to the main harness through the sensor harness 3 set in the corresponding detector housing, and the main harness is connected to the signal acquisition module.

[0019] like Figure 3 As shown, the humidity sensor 2 includes a sensor body 21, on which a sensor chip 22 and a sensor electrode 23 are mounted; the signal output end of the sensor electrode 23 is connected to the signal input end of the sensor chip 22. When in use, the sensor chip 22 is arranged inside the sensor body 21, and the sensor electrode 23 is exposed on one side facing the sensitive surface.

[0020] In this embodiment, the humidity sensor 2 has a power supply voltage of 1.8-5V DC, a working current of 16mA, and a peak current of 40mA. The sensor harness 3 has three wires: power supply, cathode, and signal. The signal voltage is 0-3.3V and is completely linearly calculated with the moisture content of 0-100%. Figure 4As shown, the signal acquisition module directly uses 12V voltage, and converts the 12V DC voltage into 5V DC voltage through the step-down chip 5V regulated power supply to power the humidity sensor 2. The signal output by the humidity sensor 2 is transmitted to the main harness through the sensor harness 3 and then further transmitted to the signal acquisition module. The signal acquisition module is connected to the host computer through the DAM3232N USB to 485 adapter produced by Altai Technology Company.

[0021] For convenience, Figure 1 Only the first, second and fifth humidity detectors are shown. In actual work, different humidity detectors are connected in parallel, but their positions in the well are different. This embodiment only sets the number of humidity detectors to five for illustration, and the number can be changed as needed in actual use. For ease of understanding, Figure 2 The structural diagram of the humidity detector given shows its internal structure.

[0022] In this embodiment, the sensor chip 22 uses the chip of TaoTimeClub capacitive soil moisture sensor, the signal acquisition module uses Beijing Altai Technology DAM3055N analog quantity acquisition voltage and current 485 module, and the host computer software uses Modbus debugging wizard V1.024. In order to save costs, in this embodiment, the existing micro-well logging detector shell in the construction process is used as the sensor carrier 1.

[0023] Example 2 A method for testing the lithology humidity of the entire well section in a loess area well This embodiment is implemented by using Embodiment 1. The method includes the following steps performed in sequence: S1. Arrange the humidity detector in the well of the loess area as required and record the depth of the target position of the humidity detector, so that the sensor electrode 23 is in full contact with the soil on the well wall at the target position; the control box, the aeration device and the host computer are all arranged on the ground; Specifically, after the humidity detector is placed at the target position, the airbag is inflated through the air pump, and the detector housing is pushed by the airbag. When the airbag is inflated and the detector housing is lifted up, the sensitive surface of the humidity sensor 2 is fully in contact with the soil on the well wall at the target position, that is, the electrode of the humidity sensor 2 is pressed tightly against the well wall and is in full contact with the soil on the well wall; S2, controlling the humidity sensor 2 to test the soil humidity at its location through the signal acquisition module in the control box, and the humidity sensor 2 outputs the test data in the form of voltage to the signal acquisition module; S3, the signal acquisition module outputs the received data signal in the form of voltage to the host computer through the 485 conversion module; S4. The host computer converts the received data into voltage-humidity data through the host computer software, and after further processing, combines the depth of the target position of the humidity detector to obtain the lithology humidity distribution data of the whole well section in the loess area. Finally, the humidity value is used to guide the design of the excitation well depth to ensure that the excitation well depth is 3m below the top interface of the moist loess.

[0024] In the process of voltage-humidity data conversion, the voltage format data is converted into humidity percentage format data. The details are as follows: during construction, run the analog signal acquisition software, convert the voltage format into humidity percentage format, set and save, collect the sensor humidity measurement data, and save the collected data into a humidity value file after the collection is completed.

[0025] In order to optimize this embodiment and make the final test results more intuitive, after completing step S4, step S5 is also performed. In step S5, the host computer software produces a lithology moisture distribution map of the entire well section in the well according to the lithology moisture distribution data of the entire well section in the loess area. Figure 5 It can be seen that the method provided in this embodiment can quantitatively measure the distribution curve of the humidity in the well as the depth.

Claims

1. A device for testing the lithology and humidity of the entire well section in a loess area, characterized in that: It includes a control box and at least one humidity sensor, and sensor carriers equal in number to the humidity sensors, and the humidity sensors are mounted on the sensor carriers one by one; it also includes a host computer, and the host computer software is set in the host computer; The control box is equipped with a signal acquisition module and a 485 conversion module; The control signal output end of the signal acquisition module is connected to the control signal input end of the humidity sensor to control the start and end of the humidity sensor signal acquisition action; the signal output end of the humidity sensor is connected to the signal input end of the signal acquisition module, and the humidity signal output end of the signal acquisition module is connected to the signal input end of the host computer through the 485 conversion module; The host computer performs voltage-humidity data conversion through the host computer software, and obtains the lithology-humidity distribution data of the whole well section in the loess area after further processing; The sensor carrier is a detector housing; The humidity sensor is a patch type humidity sensor, the back of which is attached to the outer wall of the corresponding detector housing and the front is exposed; the front refers to the sensitive surface of the humidity sensor, and the back refers to the opposite side of the sensitive surface; The humidity sensor is connected to the main wiring harness through a sensor wiring harness arranged in the housing of its corresponding detector, and the main wiring harness is respectively connected to the signal acquisition module; At least one air bag is arranged on the outer side wall of each detector housing, and the air bag and the humidity sensor attached to the same detector housing are symmetrical with respect to the detector housing; The device for testing the lithology and humidity of the entire well section in a loess region also includes an air pumping device, and the air inlet of the air bag is connected to the air outlet of the air pumping device through an air filling pipe.

2. The device for testing the lithology and humidity of the entire well section in a loess area according to claim 1 is characterized in that: The humidity sensor comprises a sensor body, on which a sensor chip and a sensor electrode are mounted; a signal output end of the sensor electrode is connected to a signal input end of the sensor chip.

3. A method for testing the lithology humidity of the entire well section in a loess region well, which is implemented by using a device for testing the lithology humidity of the entire well section in a loess region well as claimed in claim 1 or 2, characterized in that: The method comprises the following steps performed in sequence: S1. Arrange the sensor carrier with the humidity sensor installed in the well in the loess area as required, place the detector housing at the target position, inflate the airbag through the air pump, and push the detector housing through the airbag to make the sensitive surface of the humidity sensor fully contact with the soil on the well wall at the target position; S2, controlling the humidity sensor to test the soil humidity at its location through the signal acquisition module in the control box, and the humidity sensor outputs the test data in the form of voltage to the signal acquisition module; S3, the signal acquisition module outputs the received data signal in the form of voltage to the host computer through the 485 conversion module; S4. The host computer converts the received data into voltage-humidity data through the host computer software, and obtains the lithology-humidity distribution data of the whole well section in the loess area after further processing.

4. The method for testing lithology humidity in the entire well section in a loess region according to claim 3, characterized in that: In the voltage-humidity data conversion process, the voltage format data is converted into humidity percentage format data.

5. The method for testing lithology humidity of the entire well section in a loess region according to claim 3 or 4, characterized in that: After completing step S4, step S5 is further performed. In step S5, the upper computer software prepares a lithology-humidity distribution map of the entire well section in the well according to the lithology-humidity distribution data of the entire well section in the loess area.

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