阅读说明：本技术 一种x射线井筒检测装置及方法 (X-ray shaft detection device and method ) 是由 伊西锋 李玉宝 姜广彬 高恒超 魏剑飞 文志平 杨峰 卢雅兰 王世杰 朱瑛辉 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种X射线井筒检测装置及方法,检测装置包括X射线探测器、X射线发射器、地面控制解释装置,所述X射线探测器通过电缆和光缆连接地面控制解释装置,所述X射线发射器通过电缆和光缆连接地面控制解释装置。本发明用于油气水井井筒检测,解决目前油田检测技术受井筒条件限制,精度低等问题。该检测技术可大幅提高井筒检测的精度,适应性更强,在各油田修井作业领域具有广阔的应用前景。(The invention discloses an X-ray shaft detection device and a method, wherein the detection device comprises an X-ray detector, an X-ray emitter and a ground control interpretation device, the X-ray detector is connected with the ground control interpretation device through a cable and an optical cable, and the X-ray emitter is connected with the ground control interpretation device through a cable and an optical cable. The invention is used for detecting the shaft of the oil-gas well, and solves the problems that the prior oil field detection technology is limited by shaft conditions, and the precision is low. The detection technology can greatly improve the precision of shaft detection, has stronger adaptability and has wide application prospect in the field of well repair operation of various oil fields.)

1. The X-ray shaft detection device is characterized by comprising an X-ray detector, an X-ray emitter and a ground control interpretation device, wherein the X-ray detector is connected with the ground control interpretation device through an electric cable and an optical cable, and the X-ray emitter is connected with the ground control interpretation device through an electric cable and an optical cable.

2. The X-ray wellbore testing device of claim 1, wherein said electrical and optical cables are disposed within a continuous tubing.

3. The X-ray wellbore testing device of claim 1 or 2, wherein the upper end of the X-ray emitter is connected with the lower end of the X-ray detector.

4. An X-ray wellbore testing method, comprising the steps of:

step 1: firstly, conveying an X-ray emitter and an X-ray detector to a preset position by using a cable or a coiled tubing with a built-in cable;

step 2: the surface control interpretation device sends a signal to an X-ray emitter, the X-ray emitter emits X-rays from the longitudinal direction and is used for detecting the bottom of the well, and the X-ray emitter emits X-rays from the transverse direction and is used for detecting the casing of the well and the cement sheath outside the casing;

and step 3: after being reflected, the X-ray is detected by an X-ray detector, and the X-ray detector collects, removes noise and enhances detection signals and then carries out sensitization to form photoelectric signals;

and 4, step 4: the signal is transmitted to the ground control interpretation device through the cable or the coiled tubing with the built-in cable;

and 5: and the ground control interpretation device processes and inverts the signals to finally form a 2D or 3D visual image of the shaft.

5. The method of claim 4, wherein the scattering is strong due to the low atomic number of the medium in the well, and the scattering is weak due to the relatively high atomic number of the well bore and the well bottom, and the reflected radiation is received by the detector after the detection of the X-ray.

Technical Field

The invention relates to the technical field of underground operation of oil and gas wells, in particular to an X-ray shaft detection device and method.

Background

The casing is a pipeline which protects the well wall of an oil-gas well and equipment in the well, separates fluids on each layer and ensures normal production activities of the oil-gas well. After the oil field is produced and developed for a long time, due to the influence of various natural and artificial mining factors, the casing pipe can be deformed, corroded, damaged and the like, the continuous implementation of a development scheme is influenced, the normal production and development of the oil-gas field are influenced, even the production is stopped, and the economic benefit of the oil field is influenced. Therefore, the sleeve is dynamically monitored in real time, the sleeve damage information of the oil and gas well is acquired, the sleeve damage of the oil and gas well can be prevented or reduced, the service life of the sleeve is prolonged, and the production and development benefits of the oil and gas field are improved.

Currently, a plurality of casing damage detection methods are developed, such as ultrasonic televisions, multi-arm well diameters, visible light underground televisions, electromagnetic flaw detection and the like. The types of casing damage detection instruments are more, and various methods have advantages and disadvantages. The ultrasonic television is influenced by scaling, wax deposition and the like on a well wall, a multi-arm well diameter is easy to clamp by sand, a visible light underground television is limited by well fluid visibility, uncertain extra-pipe cement cracks or casing cracks are judged by noise, more influence factors are caused by acoustic imaging well logging, the electromagnetic flaw detection precision is not high, and the like.

The X-ray detector, the X-ray emitter, the ground control interpretation device, the realization principle, the use method and the like are conventional prior art in the technical field, and can be directly purchased and then connected for use.

The X-ray shaft detection technology has high penetrability, is not influenced by media in a shaft, can be used for imaging the shaft in real time, and has better adaptability.

Application No.: 200480028656.9 discloses an instrument for measuring properties of a formation surrounding a wellbore including a resistance measuring device having a plurality of antennas spaced longitudinally from each other in the instrument. The neutron measurement device of the instrument comprises at least one neutron source and at least one neutron detector, each neutron detector being at a distance from the neutron source in the longitudinal direction of the instrument. The plurality of antennas are interleaved with the neutron detector so as to reduce an overall length of the instrument and so as to allow simultaneous measurements of the determined region of the formation using the neutron detector and the resistivity measurement device.

Compared with the present application, the above-mentioned disclosed technologies are not the same in terms of overall technical solutions, purposes of the invention, effects of the invention, and the like, and do not have any technical teaching.

Disclosure of Invention

The invention aims to provide an X-ray shaft detection device and method, which are used for detecting a shaft of an oil-gas-water well and solve the problems that the existing oil field detection technology is limited by shaft conditions, low in precision and the like. The detection technology can greatly improve the precision of shaft detection, has stronger adaptability and has wide application prospect in the field of well repair operation of various oil fields.

In order to achieve the above purpose, the present invention adopts the following technical scheme that an X-ray shaft detection device comprises an X-ray detector, an X-ray emitter and a ground control interpretation device, wherein the X-ray detector is connected with the ground control interpretation device through an electric cable and an optical cable, and the X-ray emitter is connected with the ground control interpretation device through an electric cable and an optical cable.

The cable and the optical cable are arranged in the continuous oil pipe in a penetrating mode.

The upper end of the X-ray emitter is connected with the lower end of the X-ray detector.

In order to achieve the purpose, the invention adopts the following technical scheme that the X-ray shaft detection method comprises the following steps:

step 1: firstly, conveying an X-ray emitter and an X-ray detector to a preset position by using a cable or a coiled tubing with a built-in cable;

step 2: the surface control interpretation device sends a signal to an X-ray emitter, the X-ray emitter emits X-rays from the longitudinal direction and is used for detecting the bottom of the well, and the X-ray emitter emits X-rays from the transverse direction and is used for detecting the casing of the well and the cement sheath outside the casing;

and step 3: after being reflected, the X-ray is detected by an X-ray detector, and the X-ray detector collects, removes noise and enhances detection signals and then carries out sensitization to form photoelectric signals;

and 4, step 4: the signal is transmitted to the ground control interpretation device through the cable or the coiled tubing with the built-in cable;

and 5: and the ground control interpretation device processes and inverts the signals to finally form a 2D or 3D visual image of the shaft.

Because the medium in the well has low atomic number and strong scattering, and the well bore and the bottom hole falling object have relatively high atomic number and weak scattering, the reflected ray is received by the detector after the X-ray detection.

Compared with the prior art, the invention has the following beneficial effects:

(1) the X-ray detection is firstly applied to the detection of the shaft of an oil-gas-water well, and the method mainly obtains a clear shaft or shaft bottom falling object image through ground image processing according to the characteristics that the atomic number of a medium in the well is low, the scattering is strong, and the atomic number of the shaft and the shaft bottom falling object is relatively high and the scattering is weak.

(2) The detection method is less influenced by the conditions of the shaft, utilizes the characteristic of high penetration of X rays, is not influenced by oil, impurities and the like in the shaft, and has wider application range compared with the conventional detection means.

(3) The method really realizes the omnibearing detection of the shaft, the detection instrument has longitudinal and transverse detection performance, the longitudinal detection instrument can be used for detecting the shape of the shaft bottom falling object, and the transverse detection instrument can be used for detecting the shapes of the shaft casing and the cement sheath outside the shaft.

(4) The method relates to a ground control interpretation device, the underground detection result can be inverted, and the visual shaft state is provided for a tester through a shaft with a 2D or 3D form displayed on the ground.

(5) The method carries out miniaturization design on the X-ray emission and detection equipment, and conveys the X-ray emission and detection equipment to the underground through a cable or a continuous oil pipe, so that the X-ray detection in a narrow space of a shaft is realized.

Drawings

Fig. 1 is a state diagram of an X-ray wellbore testing device of the present invention.

The symbols in the drawings illustrate that: the system comprises a ground control interpretation device 1, a cable or coiled tubing 2, an X-ray detector 3 and an X-ray emitter 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: an X-ray shaft detection device comprises an X-ray detector 3, an X-ray emitter 4 and a ground control interpretation device 1, wherein the X-ray detector is connected with the ground control interpretation device through an electric cable and an optical cable, and the X-ray emitter is connected with the ground control interpretation device through an electric cable and an optical cable. In practical application, the cable can play a role in hanging connection except for electrifying, and the strength is not problematic.

Of course, stronger means such as passing the cable or cables through a continuous oil pipe may be used.

The upper end of the X-ray emitter is connected with the lower end of the X-ray detector. The connection mode can adopt the bolt to fix the shells of the two or directly weld the shells of the two into an integral structure, and also can adopt the screw thread type connection, and the like, and the two are connected, which belong to the protection scope of the invention. Of course, they may be disconnected, or they may be connected to the ground control interpretation unit via respective cables or cables.

The X-ray detector, the X-ray emitter, the ground control interpretation device, the realization principle, the use method and the like are conventional prior art in the technical field, and can be directly purchased and then connected for use.

The wellbore detection method comprises the following steps: firstly, an X-ray emitter 4 and an X-ray detector 3 are conveyed to a preset position by using a cable or a coiled tubing 2 with a built-in cable, a ground control interpretation device 1 sends signals to the X-ray emitter 4, and the X-ray emitter 4 respectively emits X-rays from the longitudinal direction for detecting the well bottom and the transverse direction for detecting a shaft casing and a cement sheath outside the casing. The X-ray is reflected and detected by the X-ray detector 3, the detection signals are collected, denoised and enhanced by the X-ray detector 3 and then subjected to sensitization to form photoelectric signals, the signals are transmitted to the ground control interpretation device 1 through a cable or a coiled tubing 2 with a built-in cable, the ground control interpretation device 1 processes and inverts the signals, and finally a 2D or 3D visual image of the shaft is formed.

The invention utilizes the characteristics of high penetration of X-rays, no influence of oil and gas content and impurities in the shaft and the like to image the shaft in real time, thereby truly realizing the omnibearing detection of the shaft. Firstly, a cable or a coiled tubing is used for lowering an X-ray detector into a preset position; then longitudinally emitting X rays, receiving ray reflection to finish the detection of the falling objects at the bottom of the well, transversely emitting the X rays, receiving ray emission to finish the detection of the shaft and the cement ring outside the shaft; and finally, transmitting the detection data to the ground through a cable, and carrying out analog inversion on the X-ray detection result by a ground control system, and displaying the result through a 2D or 3D analog image. Because the medium in the well has low atomic number, the scattering is strong, while the atomic number of the well bore and the bottom falling object is relatively high, the scattering is weak, and the reflected ray after the X-ray detection is received by the detector. And then the detector converts the detection result into an electric signal and transmits the electric signal to the ground control interpretation device. And finally, the ground control interpretation device processes and analyzes the electric signals, displays the 2D or 3D image of the shaft in real time and completes the omnibearing detection of the shaft bottom, the casing and the cement sheath.

In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

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.