A fixed-distance gamma-ray measuring instrument with built-in GPS distance calculation and recording

Abstract

The present invention belongs to the technical field of drilling tools and discloses a fixed-distance gamma ray measuring instrument with built-in GPS distance calculation and recording functions, which includes a processing module. The processing module is signal-connected to a GPS positioning module and a gamma ray measuring instrument, and the processing module is signal-connected to a data storage module, and the data storage module is signal-connected to an output module; the GPS positioning module is used to measure the distance of well logging and position the well logging to form pre-information; the gamma ray measuring instrument is used to measure the information of the well logging and form measurement information; the processing module is used to number the pre-information and the well logging information to form an information group and send it to the data storage module; the data storage module is used to number and store the information group and output it through the output module. The structure of the present invention is simple, which can match and group well logging data to determine accurate well logging data, facilitating subsequent data analysis.

Description

Technical Field

[0001] The present invention belongs to the technical field of drilling tools, and specifically relates to a fixed-distance gamma ray logging tool with built-in GPS distance calculation and recording functions. Background Art

[0002] During the exploration and development of oil and gas fields, in order to understand the oil and gas content of the formation, well logging is carried out after drilling. Most of the well logging data is obtained by wireline logging after the completion of drilling. In the construction of highly deviated wells and horizontal wells, wireline logging may encounter difficulties in lowering the instrument, and problems such as collapse and blockage of the wellbore due to poor wellbore conditions, which cause inconvenience in construction. At the same time, due to the invasion of drilling fluid, the well logging parameters after drilling and completion may also be different from those when the formation was just drilled. With the development of measurement-while-drilling technology, geosteering drilling technology has been widely applied in the construction of horizontal wells. Geosteering drilling uses engineering data measured while drilling and geological data measured while drilling to control the wellbore trajectory, and helps on-site construction personnel monitor the formation characteristics and formation changes at any time based on real-time geological data and reservoir data at the bottom of the well, make accurate judgments on the formation changes and characteristics, effectively control the wellbore trajectory to pass through the best position in the pay zone, and avoid oil / gas interfaces, oil / water interfaces, and water layers, so as to obtain the best recovery effect.

[0003] With the development of geosteering technology, measurement-while-drilling logging tools have been widely used, and natural gamma ray logging tools are included in almost all measurement-while-drilling logging tool series. Currently, one of the most commonly used measurement-while-drilling logging tool series is resistivity and natural gamma ray tools. However, in high-resistivity layer areas, due to its own accuracy limitations, the measurement-while-drilling resistivity cannot determine the reservoir interface, and generally a single gamma ray logging tool is used for measurement. However, the current gamma ray logging tool does not have a positioning function, and the collected data are all single data, and the well logging data cannot be grouped, resulting in mismatches in subsequent data analysis and processing, and ultimately inaccurate well logging data. Summary of the Invention

[0004] The purpose of the present invention is to provide a fixed-distance gamma ray logging tool with built-in GPS distance calculation and recording functions to group the measured data at fixed distances for subsequent data analysis.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows: A fixed-distance gamma ray logging tool with built-in GPS distance calculation and recording functions includes a processing module, the processing module is signal-connected to a GPS positioning module and a gamma ray logging tool, the processing module is signal-connected to a data storage module, and the data storage module is signal-connected to an output module;

[0006] The GPS positioning module is used to measure the distance of well logging and position the well logging to form pre-information;

[0007] Gamma measuring instrument, used to measure information of well logging and form measurement information;

[0008] A processing module is used to number the pre-information and the logging information to form an information group, and send it to the data storage module;

[0009] The data storage module is used to number and store the information groups, and output them through the output module.

[0010] Furthermore, the gamma measuring instrument comprises a body and a gamma sensor installed in the body, the gamma sensor is electrically connected to a battery, an information hole is opened on the body, and a sealing ring for sealing the information hole is arranged on the body.

[0011] Furthermore, a sealing portion is provided in the body, and a locking portion is provided on one side of the sealing portion;

[0012] The sealing part includes a sealing block and a ball rotatably connected to one side of the sealing block, a guide groove for slidingly cooperating with the ball is opened on the inner side wall of the body, and a locking groove is opened on the side of the sealing block away from the ball;

[0013] The locking part comprises a locking piece rotatably connected to the body, and the locking piece is slidably matched with the locking groove.

[0014] Furthermore, the main body includes a first main body, a second main body and a third main body, and the second main body is threadedly connected to the first main body and the second main body.

[0015] Furthermore, a straightening belt is sleeved on the second main body, and the straightening belt is engaged with the first main body and the third main body.

[0016] Furthermore, a shielding layer is provided on the outer periphery of the gamma sensor.

[0017] Furthermore, a spring sheet is fixedly connected to the shielding layer, a connecting opening is opened on the spring sheet, and a clamping ring is arranged on the outer periphery of the connecting opening.

[0018] The following beneficial effects are achieved by adopting the above scheme: (1) In the present invention, the GPS positioning module is used to measure the logging distance and locate the logging position, clarify the logging position, and generate pre-information; the gamma meter is used to measure the information in the logging and generate corresponding measurement information to facilitate the analysis of the lithology and other information in the logging; the processing module is then used to fuse the pre-information and the measurement information to generate corresponding information, which is stored and numbered through the data module to facilitate the operator to retrieve and analyze the information of a certain logging, or when a certain logging is selected, the measurement information is automatically output for the operator to refer to, which is convenient for logging and data analysis.

[0019] (2) In the present invention, the gamma ray measuring instrument adopts a form in which a gamma ray sensor is installed inside the main body. The contact distance with the formation is short, and the influencing factors for measurement are small, resulting in high measurement accuracy of gamma rays. However, since there is generally an annulus between the main body and the gamma ray sensor, mud enters through the information port. To overcome this problem, the spring piece is deformed by the sealing extrusion of the sealing block, and further presses the sealing ring, improving the sealing performance.

[0020] (3) In the present invention, the existing drill collars adopt an integrally formed form, and there are certain difficulties in installing the gamma ray sensor inside it. Therefore, for the convenience of maintenance and installation, this solution adopts a combined installation method of a first main body, a second main body, and a third main body, which is convenient for disassembly and maintenance. Of course, the multi-section sealing is also improved by the clamping method of the centralizer belt, reducing the probability of mud entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic circuit diagram of a distance-fixed gamma ray measuring instrument with built-in GPS distance calculation and recording according to an embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the gamma ray measuring instrument according to an embodiment of the present invention.

[0023] Figure 3 It is a cross-sectional view of the gamma ray measuring instrument according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following is a further detailed description through specific embodiments:

[0025] The reference numerals in the accompanying drawings of the specification include: the third main body 11, the centralizer belt 12, the first main body 13, the information port 14, the connecting portion 15, the engaging portion 16, the storage battery 17, the guiding groove 21, the ball 22, the sealing block 23, the cushion layer 24, the locking member 25, the spring piece 26, the pressing ring 27, the shielding layer 28, and the gamma ray sensor 31.

[0026] Basically as shown in Figure 1 FIG., Figure 2 FIG. Figure 3 and

[0027] The present application provides a distance-fixed gamma ray measuring instrument with built-in GPS distance calculation and recording, including a processing module. The processing module is signal-connected to a GPS positioning module and a gamma ray measuring instrument, the processing module is signal-connected to a data storage module, and the data storage module is signal-connected to an output module.

[0028] In this embodiment, the processing module can be a computer, the GPS positioning module can be an existing GPS device, the data storage module is an existing data storage device, and the output module can be an existing Bluetooth or 5G communication module and transmission cable, etc.

[0029] The gamma ray measuring instrument includes a body, and the body is a drill collar, and its usage form is the same as that of the existing drill collar. The difference is that the body includes a first main body 13, a second main body, and a third main body 11. Connecting parts 15 are arranged on one side of the first main body 13 and the second main body close to the second main body. Thread grooves are formed on both sides of the second main body. The second main body is threadedly connected to the first main body 13 and the second main body through the thread grooves and the connecting parts 15, so as to achieve the purpose of fixation and form the drill collar body. In this way, it is convenient to install corresponding devices and repair corresponding devices in the first main body 13, the second main body, and the third main body 11, overcomes the difficulties existing in the prior art, and reduces the probability of mud and the like entering, and improves the accuracy of data measurement to a certain extent.

[0030] A sealing part is arranged in the first main body 13. The sealing part includes a sealing block 23. A ball 22 is rotatably connected to one side of the sealing block 23. A sliding groove is formed on the inner side wall of the first main body 13. The sealing block 23 is horizontally slidably matched with the first main body 13 through the sliding groove and the ball 22. A locking part is arranged on the side of the sealing block 23 away from the ball 22. The locking part includes a locking member 25 threadedly connected to the side of the first main body 13 away from the sliding groove. A cushion layer 24 made of an elastic material is fixedly connected to the top wall of the locking groove. The locking member 25 is a bolt and the locking part is slidably matched with the locking groove. In this embodiment, the sealing block 23 is moved towards the second main body and aligned with the locking member 25, and then the locking member 25 is screwed into the locking groove and presses the cushion layer 24, so that the gap in the locking groove is reduced, and the probability of mud entering through the locking groove is reduced. During disassembly, the locking member 25 is disassembled from the locking groove and the sealing block 23 is pulled out.

[0031] In this embodiment, a centering belt 12 is sleeved on the second main body. Clamping portions 16 are arranged on both sides of the centering belt 12. Clamping grooves are arranged on both the first main body 13 and the second main body. The clamping portions 16 and the clamping grooves are both circular. The clamping portions 16 and the clamping grooves are used to seal the connection between the first main body 13 and the second main body, and the connection between the second main body and the third main body 11. A gamma sensor 31 is fixedly installed in the second main body. An arc-shaped shielding layer 28 is arranged on the outer periphery of the gamma sensor 31. A spring piece 26 is fixedly connected to the shielding layer 28. A communication port is formed in the spring piece 26. A pressing ring 27 is arranged on the outer periphery of the communication port. A circular information port 14 is formed in the first main body 13. An annular sealing ring is arranged at the information port 14. The signal transmission line of the gamma sensor 31 passes through the information port 14 and is signal-connected to a data transmission module, and is signal-connected to a processor module through the data transmission module. In this embodiment, when the sealing block 23 seals the main body, the sealing block 23 will squeeze the spring piece 26 and cause the spring piece 26 to deform and move towards the information port 14, and the pressing ring 27 presses the sealing ring, causing the sealing ring to further deform, improving the sealing effect of the information port 14, providing a certain pressure to the sealing ring, making it difficult for the pressure of the mud to enter the first main body 13 through the information port 14, thus improving the sealing effect and reducing the influence of the mud entering the drill collar on the gamma sensor 31. Of course, if it accidentally enters, it can also be blocked by the shielding layer 28, reducing the measurement influence on the gamma sensor 31 again.

[0032] In this embodiment, a storage battery 17 for supplying power to the gamma sensor 31 is installed in the third main body 11. A rubber ring for sealing (not shown in the figure) is arranged in the third main body 11.

[0033] During implementation: The GPS positioning module measures the distance of the well logging and locates the position of the well logging to obtain corresponding positioning information and distance information. The positioning information and the distance information form pre-information, and the pre-information is transmitted to the processing module.

[0034] During well logging, the gamma sensor 31 in the main body enters the well logging along with the drill collar and performs azimuth measurement through the shielding layer 28. At this time, the measurement information obtained by the gamma sensor 31 is transmitted to the processing module through the data transmission module. The processing module groups the pre-information and the measurement information to obtain an information group, and sends it to the data storage module. The data storage module numbers the information group to determine the information of the well logging. Then it is output to the server or other devices through the output module for the operator to perform corresponding data analysis.

[0035] In this embodiment, through the matching of the pre - information and the measurement information, the operator can determine the position and distance of the well logging through the measurement information, and can also determine the measurement information of the well logging through the pre - information. In this way, it is convenient for the operator to conduct targeted analysis and determination, which is conducive to subsequent data analysis and processing.

[0036] The above are only embodiments of the present invention. Common general knowledge such as specific structures and characteristics in the prior art are not described in detail here. Those of ordinary skill in the art know all the general technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can know all the prior art in this field, and have the ability to apply conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, combine their own abilities to improve and implement this solution. Some typical well - known structures or well - known methods should not become an obstacle for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A fixed-distance gamma-ray measuring instrument with built-in GPS distance calculation and recording, characterized in that: It includes a processing module, which is signal-connected to a GPS positioning module and a gamma ray detector. The processing module is signal-connected to a data storage module, and the data storage module is signal-connected to an output module; The GPS positioning module is used to measure the distance of well logging and position the well logging to form pre-information; The gamma ray detector is used to measure the information of well logging and form well logging information; The processing module numbers the pre-information and the well logging information to form an information group and sends it to the data storage module; The data storage module numbers and stores the information group and outputs it through the output module; The gamma ray detector includes a body and a gamma sensor installed in the body. The gamma sensor is electrically connected to a storage battery. An information hole is opened on the body, and a sealing ring for sealing the information hole is arranged on the body. A sealing part is arranged in the body, and a locking part is arranged on one side of the sealing part. The sealing part includes a sealing block and a ball rotatably connected to one side of the sealing block. A guiding groove slidably matched with the ball is opened on the inner side wall of the body. A locking groove is opened on the side of the sealing block away from the ball. The locking part includes a locking member rotatably connected to the body, and the locking member is slidably matched with the locking groove; A shielding layer is arranged on the outer periphery of the gamma sensor. A spring piece is fixedly connected to the shielding layer, and a communication port is opened on the spring piece. A pressing ring is arranged on the outer periphery of the communication port; When the sealing block is used to seal the body, the sealing block will squeeze the spring piece and cause the spring piece to deform and move towards the information port, and the pressing ring presses the sealing ring, causing the sealing ring to deform further, improving the sealing effect of the information port. When disassembling, the locking member is disassembled from the locking groove and the sealing block is pulled out.

2. The fixed-distance gamma-ray measuring instrument with built-in GPS distance calculation and recording according to claim 1, characterized in that: The body includes a first main body, a second main body and a third main body. The second main body is threadedly connected to both the first main body and the third main body.

3. The fixed-distance gamma ray measuring instrument with built-in GPS distance calculation and recording according to claim 2, characterized in that: A centralizer belt is sleeved on the second main body, and the centralizer belt is engaged with the first main body and the third main body.

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