CN113093307A

CN113093307A - Dipole transmitting transducer testing device and method

Info

Publication number: CN113093307A
Application number: CN202010575047.6A
Authority: CN
Inventors: 张波; 张晋言; 陈浩; 晁永胜; 许孝凯; 纪祝华; 翟勇; 李明刚; 柏强; 孙锋; 闫永平; 秦欣
Original assignee: China Petrochemical Corp; Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Logging Co of Sinopec Shengli Petroleum Engineering Corp
Current assignee: Shengli Logging Co Of Sinopec Jingwei Co ltd; China Petrochemical Corp; Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Sinopec Jingwei Co Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-07-09

Abstract

The invention relates to the technical field of geophysical logging, in particular to a dipole transmitting transducer testing system and a method. Including data processing and detecting system, analog signal processing and collection system, receiving array is connected with analog signal processing and collection system, data processing and detecting system communication in proper order, receiving array comprises a plurality of receiving transducer. Each receiving transducer in the receiving array is coated with a coupling agent and then fixed on an instrument to receive an analog signal sent by the transmitting transducer, and then the signal is processed and analyzed to realize the online detection of the transmitting transducer.

Description

Dipole transmitting transducer testing device and method

Technical Field

The invention relates to the technical field of geophysical logging, in particular to a dipole transmitting transducer testing system and a method.

Background

The detection of the anisotropy of the stratum has an important role in unconventional oil and gas development, and the formation anisotropy causes are divided into two main categories: one is caused by directional fractures or cross-bedding of the formation itself and one is caused by biased ground stress. Thus identifying the anisotropy of the formation may detect fractures or the earth stresses experienced by the formation. At present, in the well logging, the anisotropy parameters of the stratum are generally obtained by inversion of the quartering data measured by the crossed dipoles. To obtain accurate formation anisotropy parameters, the dipole source and receiver are required to be symmetric. In order to ensure the symmetry of the transducer, the directivity measurement of the transducer is generally carried out in a large water pool, and although the method has high measurement accuracy, the measurement is time-consuming and high in cost, so that the method is suitable for factory inspection of the transducer. Various kinds of damage may occur to the transducer, particularly the transmitting transducer, during use, resulting in reduced performance and impaired symmetry. Therefore, it is necessary to test the transmitting transducer before the tool is lowered into the well to ensure that the transducer is intact before the downhole measurements are taken.

Disclosure of Invention

In order to overcome the defects of the existing transducer pool testing technology, the invention provides a dipole transmitting transducer testing system and a dipole transmitting transducer testing method. By adopting the device, the performance of the transmitting transducer can be detected without disassembling the instrument. The workload of the transducer performance test is reduced, and the cost and time of pool detection are saved.

The technical scheme is as follows:

the utility model provides a dipole transmitting transducer test system, includes data processing and detecting system, analog signal processing and collecting system, receiving array is connected with analog signal processing and collecting system, data processing and detecting system communication in proper order, receiving array comprises a plurality of receiving transducers.

The data processing and detecting system consists of a display device, a digital image processing module and an industrial personal computer; the analog signal processing and collecting system consists of a high-speed communication port, an FPGA module, a data cache module, an AD conversion module and an analog signal processing module; the receiving array is in communication connection with the analog signal processing module; the analog signal processing module is sequentially in communication connection with the AD conversion module and the data cache module, the FPGA module is respectively in communication connection with the data cache module, the AD conversion module and the analog signal processing module, and the high-speed communication port is respectively in communication connection with the FPGA module and the industrial personal computer; the industrial personal computer is respectively in communication connection with the display device and the digital image processing module, and the digital image processing module is in communication connection with the display device.

A dipole transmitting transducer testing method comprising the steps of:

coating a coupling agent on a receiving transducer of a test system and fixing the receiving transducer on a transmission window of each transmitting transducer;

connecting the instrument and supplying power to the instrument according to the requirement, and starting the transmitting transducer to work;

step three, the receiving transducer collects the analog signals sent by each transmitting transducer;

and step four, converting the analog signals acquired in the step three into digital signals through the analog signal processing module, the AD conversion module and the data cache module and transmitting the digital signals to the FPGA module.

And step five, the FPGA module receives the digital signals generated in the step four, sorts and analyzes the signals, and transmits the signals to the industrial personal computer through the high-speed communication port.

And step six, the industrial personal computer transmits the received digital signals to the digital image processing module, and the digital image processing module converts the digital signals into image signals and transmits the image signals to the display module for display.

And seventhly, analyzing the displayed signals and evaluating the working state of each transducer.

Furthermore, the receiving transducer is rotated in sequence, signals of the transmitting transducer are collected for multiple times, different measurement results are added after time-of-arrival correction, and then comparison is carried out.

Furthermore, in the seventh step, the acquired signals may be compared with the signals measured in the previous stage to determine the performance change of the transducer, and meanwhile, the signals recorded in different directions may be compared to determine the symmetry of the transducer.

The invention has the beneficial effects that:

1. the detection device of the invention has small volume and is convenient to carry. In addition, because the receiving device is directly coupled with the transmitting transducer during measurement, the instrument can be quickly and conveniently detected in an instrument debugging workshop and a logging field without a special pool environment;

2. the detection device of the invention does not need to detach the detected transducer from the instrument, thereby realizing the on-line detection of the transmitting transducer.

Drawings

FIG. 1 is a system measurement block diagram;

FIG. 2 is a diagram of an example measurement;

FIG. 3 is a diagram of another example of measurement;

FIG. 4 is a waveform of measurements from the same transmitter in different orientations;

in the figure: 101 data processing and detecting system, 102 analog signal processing and acquisition system, 103 receiving array, 1011 display module, 1012 digital image processing module, 1013 industrial computer, 1021 high-speed communication port, 1022 FPGA module, 1023 data cache module, 1024 AD conversion module, 1025 analog signal processing module, 1031 receiving transducer, 104, the transmitting transducer that awaits measuring.

Detailed Description

The principles and operation of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

As shown in fig. 1, a dipole transmitting transducer testing apparatus comprises the following components:

composition 101: the data processing and detecting part comprises the following components:

(1011) displaying the acquired waveform in real time, and processing a conclusion obtained by software;

(1012) processing the acquired data and feeding back a processing result;

(1013) and the core component of the control system is responsible for receiving the data transmitted by the acquisition system, providing support for the control system (1012) and driving the control system (1011) to display.

Composition 102: the analog signal processing and acquisition system part comprises the following components:

(1021) transmitting the collected data to a high-speed communication port of the (101) in real time;

(1022) the FPGA controls the work of the whole (102) module;

(1023) caching the collected data;

(1024) realizing analog-to-digital conversion of the analog signal;

(1025) receiving the original analog signal from (103), and then adjusting the signal to a suitable amplitude range under the control of (1022);

composition 103: a receive array consisting of:

(1031) the receiving transducer is composed of 4 or 8 receiving transducers and is used for receiving the sound wave signals transmitted by the transmitting transducer.

A dipole transmitting transducer test method is that a receiving transducer of a test device is coated with a coupling agent and fixed on an acoustic window of each transmitting transducer; normally connecting and electrifying the instrument and starting working; the detection device collects signals of each transmitting transducer; and analyzing and processing the acquired signals.

As shown in fig. 2, the signal diagram of a transmitting transducer in the horizontal direction measured by the detecting device can be used as a standard reference signal for transducer delivery.

As shown in fig. 3, the signal diagram of another transmitting transducer in the horizontal direction measured by the detecting device can be used as a standard reference signal for the transducer factory.

As shown in fig. 4, the test results of the present test device measuring a transmitting transducer at different orientations can be used to assess the consistency of the transmitting transducer in different directions.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A dipole transmitting transducer testing system, comprising: including data processing and detecting system, analog signal processing and collection system, receiving array is connected with analog signal processing and collection system, data processing and detecting system communication in proper order, receiving array comprises a plurality of receiving transducer.

2. The dipole transmitting transducer testing system of claim 1, wherein: the data processing and detecting system consists of a display device, a digital image processing module and an industrial personal computer.

3. The dipole transmitting transducer testing system of claim 1, wherein: the analog signal processing and collecting system consists of a high-speed communication port, an FPGA module, a data cache module, an AD conversion module and an analog signal processing module.

4. The dipole transmitting transducer testing system of claim 1, wherein: the receiving array is in communication connection with the analog signal processing module.

5. The dipole transmitting transducer testing system of claim 1, wherein: the analog signal processing module is sequentially in communication connection with the AD conversion module and the data cache module, the FPGA module is respectively in communication connection with the data cache module, the AD conversion module and the analog signal processing module, and the high-speed communication port is respectively in communication connection with the FPGA module and the industrial personal computer.

6. The dipole transmitting transducer testing system of claim 1, wherein: the industrial personal computer is respectively in communication connection with the display device and the digital image processing module, and the digital image processing module is in communication connection with the display device.

7. A dipole transmitting transducer testing method based on a dipole transmitting transducer testing system according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:

step four, the analog signals collected in the step three are converted into digital signals through an analog signal processing module, an AD conversion module and a data cache module and transmitted to an FPGA module;

fifthly, the FPGA module receives the digital signals generated in the fourth step, sorts and analyzes the signals, and transmits the signals to the industrial personal computer through the high-speed communication port;

the industrial personal computer transmits the received digital signals to the digital image processing module, and the digital image processing module converts the digital signals into image signals and transmits the image signals to the display module for display;

8. The dipole transmitting transducer testing method of claim 7, wherein: and rotating the receiving transducer in sequence, collecting signals of the transmitting transducer for multiple times, adding different measurement results after time-arrival correction, and comparing.

9. A dipole transmitting transducer testing method according to claim 7 or 8, characterized in that: and seventhly, comparing the acquired signals with signals measured in the earlier stage to judge the performance change of the transducer, and simultaneously comparing signals recorded in different directions to judge the symmetry of the transducer.