Composite logging device

Abstract

The invention provides a composite well logging device, and relates to the technical field of oil and gas well logging equipment, the composite well logging device comprises an array lateral well logging assembly, a well diameter pushing assembly and an acoustic well logging assembly, the array lateral well logging assembly comprises a first short section, a framework, a circuit unit and an electrode unit, the framework and the circuit unit are arranged in the first short section, and the electrode unit is arranged in the first short section; the framework is connected to the first short section, the circuit unit is connected to the framework, and the electrode unit comprises a main current electrode, a first power supply electrode pair, a second power supply electrode pair, a third power supply electrode pair, a fourth power supply electrode pair and a fifth power supply electrode pair; the fifth power supply electrode pair comprises a fifth power supply electrode, the borehole diameter pushing assembly comprises a second short section, the acoustic logging assembly comprises a third short section, and the two ends of the first short section are connected with the second short section and the third short section correspondingly, so that the second short section and the third short section serve as the two fifth power supply electrodes of the array lateral logging assembly correspondingly. The composite logging device is small in length and weight and low in manufacturing cost.

Description

Technical Field

[0001] This application relates to the field of oil and gas logging equipment technology, and in particular to a composite logging device. Background Technology

[0002] Currently, lateral movement and acoustic logging instruments are indispensable in oil and gas logging. Combined with inclination and four-arm caliper instruments, this instrument string can acquire formation resistivity and porosity in a single run-in, while simultaneously measuring important parameters such as the X-axis caliper diameter (CALX), Y-axis caliper diameter (CALY), inclination angle, and azimuth angle. The existing instrument string connection sequence is: straight-through hard electrode + hard electrode with SP ring + remote gamma sub + inclination caliper electronic instrument + four-arm caliper pusher + array lateral movement electronic instrument + array lateral electrode system + array lateral movement downward electronic instrument + digital acoustic instrument.

[0003] However, existing logging methods have the following shortcomings: First, the combined length of the instrument string is approximately 27m, which poses a significant challenge for high-risk wells, increasing the risk of accidents. Furthermore, since the sections of each instrument in the string are made of pressure-resistant material, the longer the string, the higher its manufacturing cost, thus increasing the overall cost of the instrument string. Second, the entire instrument string weighs approximately 600KG, increasing the risk of jamming or obstruction during logging, thus raising the overall danger level. Finally, the long combined length and heavy weight of the instrument string prevent it from being combined with other instruments, limiting the timeliness of logging operations. Summary of the Invention

[0004] Based on this, this application provides a composite logging device with a smaller overall length and weight, and lower manufacturing cost.

[0005] This application provides a composite logging device, including an array lateral logging assembly, a caliper push assembly, and an acoustic logging assembly. The array lateral logging assembly includes a first short section, a frame, a circuit unit, and an electrode unit. The frame and the circuit unit are both disposed within the first short section. The frame is connected to the first short section, and the circuit unit is connected to the frame. The electrode unit includes a main current electrode, a first power supply electrode pair, a second power supply electrode pair, a third power supply electrode pair, a fourth power supply electrode pair, and a fifth power supply electrode pair. The main current electrode, the first power supply electrode pair, the second power supply electrode pair, the third power supply electrode pair, and the fourth power supply electrode are all disposed within the first short section.

[0006] The fifth power supply electrode pair includes two fifth power supply electrodes, the caliper push assembly includes a second short section, the sonic logging assembly includes a third short section, and the two ends of the first short section are respectively connected to the second and third short sections, so that the second and third short sections respectively serve as two fifth power supply electrodes of the array lateral logging assembly.

[0007] In one possible implementation, the composite logging device provided in this application further includes a continuous inclination logging assembly, which includes a fourth short section, and the sonic logging assembly further includes a fifth short section. The electrode unit further includes a sixth power supply electrode pair, which includes two sixth power supply electrodes.

[0008] The fourth short section is connected to the end of the second short section opposite to the first short section, so that the fourth short section acts as a sixth power supply electrode of the array lateral logging assembly. The fifth short section is connected to the end of the third short section opposite to the first short section, so that the fifth short section acts as another sixth power supply electrode of the array lateral logging assembly.

[0009] In one possible implementation, the composite logging device provided in this application further includes a metal spring, and the second and third short sections are electrically connected to the first short section via the metal spring.

[0010] In one possible implementation, the composite logging device provided in this application further includes an insulating sub, wherein a fourth sub is insulatedly connected to a second sub through the insulating sub, and a fifth sub is insulatedly connected to a third sub through the insulating sub.

[0011] In one possible implementation, the circuit unit includes interconnected power supply unit, main control unit, signal generation unit, current potential acquisition unit, auxiliary focusing unit and preamplifier unit, and the frame includes a first mounting section, a heat insulation section and a second mounting section connected in sequence along its own length direction.

[0012] The power supply unit is connected to the end of the first mounting section near the second mounting section. The main control unit, signal generation unit, current and potential acquisition unit, auxiliary focusing unit and preamplifier unit are all connected to the second mounting section. The main control unit is located at the end of the second mounting section facing the first mounting section, and the auxiliary focusing unit is located at the end of the second mounting section away from the first mounting section.

[0013] In one possible implementation, the acoustic logging assembly also includes an electronic circuit unit and an acoustic system unit, with the electronic circuit unit located in the second short section and the acoustic system unit located in the fifth short section.

[0014] In one possible implementation, the composite logging device provided in this application further includes a connector, wherein the array lateral logging component and the caliper push component, as well as the array lateral logging component and the sonic logging component, are electrically connected through the connector.

[0015] In one possible implementation, the connector is a 31-pin standard plug.

[0016] In one possible implementation, the composite logging device provided in this application further includes at least one of a natural gamma detection component, a three-dimensional sensing detection component, and an array detection sensing component;

[0017] The natural gamma detection component is connected to the end of the fourth segment away from the second segment, while the three-dimensional sensing detection component and the array sensing detection component are connected to the end of the fifth segment away from the third segment.

[0018] In one possible implementation, the electrode unit further includes a main supervisory electrode pair, a first supervisory electrode pair, a second supervisory electrode pair, a third supervisory electrode pair, a fourth supervisory electrode pair, and a fifth supervisory electrode pair, all of which are disposed in the first short section.

[0019] The composite logging device provided in this application includes an array lateral logging assembly, a caliper pushing assembly, and an acoustic logging assembly. The array lateral logging assembly includes a first short section, a frame, a circuit unit, and an electrode unit. The electrode unit includes a main current electrode, a first power supply electrode pair, a second power supply electrode pair, a third power supply electrode pair, a fourth power supply electrode pair, and a fifth power supply electrode pair. The caliper pushing assembly includes a second short section, and the acoustic logging assembly includes a third short section. The first short section is used to install the main current electrode, the first power supply electrode pair, the second power supply electrode pair, the third power supply electrode pair, and the fourth power supply electrode pair. The frame is used to install the circuit unit. By setting up a circuit unit to control the array lateral logging component for detection, setting up a second short section for installing the pusher component of the caliper pusher component, which also serves as one of the fifth power supply electrodes of the fifth power supply electrode pair, and setting up a third short section for installing the detection component of the sonic logging component, which also serves as the other fifth power supply electrode of the fifth power supply electrode pair, the array lateral logging component shares a part of the structure with the caliper pusher component and the sonic logging component. This reduces the length, weight and manufacturing cost of the array lateral logging component, thereby reducing the overall length, weight and manufacturing cost of the composite logging device.

[0020] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that the composite logging device provided by this application can solve, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the composite logging device provided in the embodiments of this application;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the mid-array lateral logging assembly;

[0024] Figure 3 for Figure 1 Schematic diagram of the structure of the medium-diameter push-in assembly;

[0025] Figure 4 for Figure 1 Schematic diagram of the structure of the medium-sonic logging assembly and insulating sub;

[0026] Figure 5 This is a schematic diagram of the skeleton and circuit unit in the composite logging device provided in the embodiments of this application;

[0027] Figure 6 for Figure 1 A schematic diagram of the structure of the Zhonglian oblique logging assembly and the insulating short section.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100-Array lateral logging assembly; 110-First short section; 120-Electrode unit; 121-Power supply electrode; 122-Monitoring electrode; 130-Frame; 131-First mounting section; 132-Insulation section; 133-Second mounting section; 140-Circuit unit; 141-Power supply unit; 142-Main control unit; 143-Signal generation unit; 144-Current potential acquisition unit; 145-Auxiliary focusing unit; 146-Preamplifier unit;

[0030] 200 - Wellbore push-in assembly; 210 - Second short section; 220 - Push-in arm;

[0031] 300 - Acoustic logging assembly; 310 - Third sub-section; 320 - Fifth sub-section;

[0032] 400 - Connecting oblique logging assembly; 410 - Fourth short section;

[0033] 500-Insulation Short Joint. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0038] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0039] Currently, lateral movement and acoustic logging instruments are indispensable in oil and gas logging. Combined with inclination and four-arm caliper instruments, this instrument string can acquire formation resistivity and porosity in a single run-in, while simultaneously measuring important parameters such as the X-axis caliper diameter (CALX), Y-axis caliper diameter (CALY), inclination angle, and azimuth angle. The existing instrument string connection sequence is: straight-through hard electrode + hard electrode with SP ring + remote gamma sub + inclination caliper electronic instrument + four-arm caliper pusher + array lateral movement electronic instrument + array lateral electrode system + array lateral movement downward electronic instrument + digital acoustic instrument.

[0040] However, existing logging methods have the following shortcomings: First, the combined length of the instrument string is approximately 27m, which poses a significant challenge for high-risk wells, increasing the risk of accidents. Furthermore, since the sections of each instrument in the string are made of pressure-resistant material, the longer the string, the higher its manufacturing cost, thus increasing the overall cost of the instrument string. Second, the entire instrument string weighs approximately 600KG, increasing the risk of jamming or obstruction during logging, thus raising the overall danger level. Finally, the long combined length and heavy weight of the instrument string prevent it from being combined with other instruments, limiting the timeliness of logging operations.

[0041] During this process, the applicant discovered that, since the length and weight of the inclination caliper, four-arm caliper pusher, array side-up caliper, array side-electrode system, array side-down caliper, and digital sonic instrument are relatively high in the entire instrument string, it is possible to effectively reduce the overall length and weight of the instrument string by focusing on reducing the length and weight of one or both of these components, while ensuring that the logging function of the instrument string is not affected. This would improve the logging timeliness of the instrument string and reduce its manufacturing cost.

[0042] In view of this, embodiments of this application provide a composite logging device, which includes an array lateral logging component, a caliper push component, and an acoustic logging component. The second short section of the caliper push component serves as a fifth power supply electrode of the array lateral logging component, and the third short section of the acoustic logging component serves as another fifth power supply electrode of the array lateral logging component. The circuit unit of the array lateral logging component is housed within the first short section. This allows the array lateral logging component, the caliper push component, and the acoustic logging component to share a common structural component, thereby eliminating the need for the array lateral up-electronic and array lateral down-electronic instruments in the prior art. This reduces the length and weight of the array lateral logging component, thereby reducing the overall length, weight, and manufacturing cost of the composite logging device.

[0043] The specific implementation of the composite logging device provided in this application will be described in detail below with reference to the accompanying drawings.

[0044] Reference Figures 1 to 5 As shown, the composite logging device provided in this application includes an array lateral logging assembly 100, a caliper push assembly 200, and an acoustic logging assembly 300. The array lateral logging assembly 100 includes a first short section 110, a frame 130, a circuit unit 140, and an electrode unit 120. The frame 130 and the circuit unit 140 are both disposed within the first short section 110. The frame 130 is connected to the first short section 110, and the circuit unit 140 is connected to the frame 130. The electrode unit 120 includes a main current electrode, a first power supply electrode pair, a second power supply electrode pair, a third power supply electrode pair, a fourth power supply electrode pair, and a fifth power supply electrode pair. The main current electrode, the first power supply electrode pair, the second power supply electrode pair, the third power supply electrode pair, and the fourth power supply electrode 121 are all disposed within the first short section 110.

[0045] The fifth power supply electrode pair includes two fifth power supply electrodes. The caliper push assembly 200 includes a second short section 210, and the sonic logging assembly 300 includes a third short section 310. The two ends of the first short section 110 are respectively connected to the second short section 210 and the third short section 310, so that the second short section 210 and the third short section 310 respectively serve as two fifth power supply electrodes of the array lateral logging assembly 100.

[0046] It is understood that in this application, the array lateral logging component 100 can be used to quantitatively describe thin-layer and formation invasion characteristics, measure formation resistivity, invert formation invasion parameters and true resistivity, and determine formation oil saturation. Compared to dual lateral logging, which can only provide two logging curves (deep and shallow), array lateral logging can provide logging curves for five different detection depths, effectively enabling the identification and evaluation of complex oil and gas layers. The caliper push component 200 is used to push the entire composite logging device to one side of the well wall and keep it close to the well wall. The acoustic logging component 300 can be used to obtain formation porosity and formation correlation, etc. The acoustic logging component 300 of this application can use digital acoustic waves, which have the advantages of high reliability and strong anti-interference ability compared to array acoustic waves.

[0047] The electrode unit 120 may have 13 power supply electrodes 121 and 12 monitoring electrodes 122. That is, the electrode unit 120 may include a main current electrode, a first power supply electrode pair, a second power supply electrode pair, a third power supply electrode pair, a fourth power supply electrode pair, a fifth power supply electrode pair, and a sixth power supply electrode pair. Each of the first, second, third, fourth, and fifth power supply electrode pairs includes two power supply electrodes 121. The two power supply electrodes 121 of the first, second, third, fourth, and fifth power supply electrode pairs are distributed on both sides of the main current electrode. In this application, a total of nine power supply electrodes 121 of the main current electrode, the first, second, third, and fourth power supply electrode pairs are arranged in the first short section 110, which is the main detection component of the array lateral logging assembly 100. One fifth power supply electrode of the fifth power supply electrode pair is arranged in the second short section 210 of the caliper push assembly 200, and the other fifth power supply electrode of the fifth power supply electrode pair is arranged in the third short section 310 of the acoustic logging assembly 300.

[0048] It should be noted that the wellbore pushing assembly 200 may include a pushing arm 220 and a drive motor. The drive motor is located inside the second short section 210. The pushing arm 220 is movably connected to the second short section 210, and the pushing arm 220 can open or close relative to the second short section 210 under the drive of the drive motor.

[0049] In the existing technology, the signal generator board, current potential acquisition board and preamplifier board of the array side-mounted instrument are located in the electrode system, the power supply board and main control board are located in the array side-mounted upper electronic instrument, and the auxiliary focusing board is located in the array side-mounted lower electronic instrument. In this application, the circuit unit 140 may include a power supply unit 141, a main control unit 142, a signal generation unit 143, a current and potential acquisition unit 144, an auxiliary focusing unit 145, and a preamplifier unit 146. The circuit unit 140 can be used to power the electrode unit 120, control the electrode unit 120 to transmit signals, and process the signals acquired by the electrode unit 120. The power supply unit 141, the main control unit 142, the signal generation unit 143, the current and potential acquisition unit 144, the auxiliary focusing unit 145, and the preamplifier unit 146 are all located in the first short section 110. Therefore, the second short section 210 and the third short section 310 can be used as the fifth power supply electrode pair of the array lateral logging assembly 100, and thus as secondary detection components of the array lateral logging assembly 100. In this way, the array lateral up electron instrument and the array lateral down electron instrument in the prior art can be eliminated, thereby reducing the length and weight of the array lateral logging assembly 100, and thus reducing the overall length, overall weight, and manufacturing cost of the composite logging device.

[0050] In the prior art, the length of the array side-up electron instrument is about 1.7m, the weight is about 37.2Kg, and the manufacturing cost is about 50,000 RMB. The length of the array side-down electron instrument is about 1.3m, the weight is about 21.9Kg, and the manufacturing cost is about 50,000 RMB. If the array side-up electron instrument and the array side-down electron instrument are eliminated, the length of the composite logging device can be reduced by about 3m, the weight can be reduced by about 59.1Kg, and the manufacturing cost can be reduced by about 100,000 RMB. Compared with the instrument string in the prior art, the composite logging device of this application has a significant reduction in length, weight and manufacturing cost.

[0051] The composite logging device provided in this application includes an array lateral logging assembly 100, a caliper push assembly 200, and an acoustic logging assembly 300. The array lateral logging assembly 100 includes a first short section 110, a frame 130, a circuit unit 140, and an electrode unit 120. The electrode unit 120 includes a main current electrode, a first power supply electrode pair, a second power supply electrode pair, a third power supply electrode pair, a fourth power supply electrode pair, and a fifth power supply electrode pair. The caliper push assembly 200 includes a second short section 210, and the acoustic logging assembly 300 includes a third short section 310. The first short section 110 is used to install the main current electrode, the first power supply electrode pair, the second power supply electrode pair, the third power supply electrode pair, and the fourth power supply electrode pair. The frame 130... The circuit unit 140 is used to control the array lateral logging assembly 100 for detection. The second short section 210 is used to install the pusher component of the caliper pusher assembly 200, which also serves as one of the fifth power supply electrodes of the fifth power supply electrode pair. The third short section 310 is used to install the detection component of the acoustic logging assembly 300, which also serves as the other fifth power supply electrode of the fifth power supply electrode pair. This allows the array lateral logging assembly 100 to share a portion of the structure with the caliper pusher assembly 200 and the acoustic logging assembly 300, thereby reducing the length, weight, and manufacturing cost of the array lateral logging assembly 100, and thus reducing the overall length, weight, and manufacturing cost of the composite logging device.

[0052] Reference Figure 1 and Figure 6 As shown, in one possible implementation, the composite logging device provided in this application further includes a directional logging assembly 400, which includes a fourth short section 410. The sonic logging assembly 300 also includes a fifth short section 320. The electrode unit 120 further includes a sixth power supply electrode pair, which includes two sixth power supply electrodes.

[0053] The fourth short section 410 is connected to the end of the second short section 210 opposite to the first short section 110, so that the fourth short section 410 serves as a sixth power supply electrode of the array lateral logging assembly 100, and the fifth short section 320 is connected to the end of the third short section 310 opposite to the first short section 110, so that the fifth short section 320 serves as another sixth power supply electrode of the array lateral logging assembly 100.

[0054] Understandably, the inclined logging assembly 400 can be used to measure parameters such as the inclination angle and azimuth angle of the wellbore. The inclined logging assembly 400 may include a fourth short section 410, which is used to install the detection components of the inclined logging assembly 400. The acoustic logging assembly 300 may include two parts: a third short section 310 and a fifth short section 320. When the acoustic logging assembly 300 adopts a digital acoustic method, it may include an electronic circuit unit and an acoustic system unit. The electronic circuit unit and the acoustic system unit are connected through a connector so that data can be transmitted between them. The acoustic system unit may include a transmitting transducer and a receiving transducer. The transmitting transducer is used to transmit acoustic signals, and the receiving transducer is used to receive acoustic signals. The electronic circuit unit may include a main control module and an acquisition module, etc. The main control module is used to generate and transmit control signals, and the acquisition module is used to periodically acquire acoustic signals and perform digital-to-analog conversion.

[0055] Since the array side-mounted logging assembly 100 has 13 power supply electrodes 121, the main current electrode, the first power supply electrode pair, the second power supply electrode pair, the third power supply electrode pair, and the fourth power supply electrode pair are located in the first short section 110, and the two fifth power supply electrodes are located in the second short section 210 and the third short section 310, respectively, in related technologies, a longer empty short section is attached to the lower end of the array side-mounted logging instrument as the sixth power supply electrode. The length of the empty short section is about 3m, the weight is about 45Kg, and the manufacturing cost is about 70,000 RMB. This method not only increases the length and weight of the entire instrument string, but also increases the manufacturing cost of the short section, thus increasing the overall manufacturing cost of the instrument string.

[0056] In this application, the fourth short section 410 of the inclined logging assembly 400 is used as one of the sixth power supply electrodes of the sixth power supply electrode pair, and the fifth short section 320 of the sonic logging assembly 300 is used as the other sixth power supply electrode of the sixth power supply electrode pair. This eliminates the need for empty short sections in the prior art, thereby reducing the length, weight, and manufacturing cost of the array lateral logging assembly 100, and consequently reducing the overall length, weight, and manufacturing cost of the composite logging device. At the same time, all detection functions of the composite logging device can still be normally achieved.

[0057] It should be understood that the array lateral logging assembly 100 employs multiple electrode arrangements and simultaneously achieves measurements at different detection depths by changing the positions of the power supply electrode 121 and the monitoring electrode 122. That is, one of the first power supply electrode pair, the second power supply electrode pair, the third power supply electrode pair, the fourth power supply electrode pair, and the fifth power supply electrode needs to form a circuit with the main current electrode. In order to enable the current to flow between the first short section 110, the second short section 210, and the third short section 310, in some embodiments, the composite logging device provided in this application also includes a metal spring, and the second short section 210 and the third short section 310 are both electrically connected to the first short section 110 through the metal spring.

[0058] Thus, the first short section 110 and the second short section 210 are short-circuited together, and the first short section 110 and the third short section 310 are short-circuited together, so that current can flow between the first short section 110, the second short section 210 and the third short section 310, thereby enabling the fifth power supply electrode located in the second short section 210 and the fifth power supply electrode located in the third short section 310 to form a circuit with the main current electrode located in the first short section 110.

[0059] Reference Figure 1 , Figure 4 and Figure 6 As shown, in one possible implementation, the composite logging device provided in this application further includes an insulating subsection 500, a fourth subsection 410 which is insulatedly connected to the second subsection 210 via the insulating subsection 500, and a fifth subsection 320 which is insulatedly connected to the third subsection 310 via the insulating subsection 500.

[0060] It should be noted that, since the fifth power supply electrode needs to be insulated from the sixth power supply electrode, and the fifth power supply electrode is located between the second short section 210 and the third short section 310, while the sixth power supply electrode is located between the fourth short section 410 and the fifth short section 320, the installation of an insulating short section 500 between the second short section 210 and the fourth short section 410, and between the third short section 310 and the fifth short section 320, can isolate the fifth power supply electrode from the sixth power supply electrode, thereby enabling the array lateral logging assembly 100 to perform its detection function normally.

[0061] Reference Figure 5 As shown, in one possible implementation, the circuit unit 140 includes a power supply unit 141, a main control unit 142, a signal generation unit 143, a current potential acquisition unit 144, an auxiliary focusing unit 145, and a preamplifier unit 146 connected to each other. The frame 130 includes a first mounting section 131, a heat insulation section 132, and a second mounting section 133 connected in sequence along its own length direction.

[0062] The power supply unit 141 is connected to the end of the first mounting section 131 near the second mounting section 133. The main control unit 142, the signal generation unit 143, the current and potential acquisition unit 144, the auxiliary focusing unit 145, and the preamplifier unit 146 are all connected to the second mounting section 133. The main control unit 142 is located at the end of the second mounting section 133 facing the first mounting section 131, and the auxiliary focusing unit 145 is located at the end of the second mounting section 133 away from the first mounting section 131.

[0063] Therefore, in this application, all circuit units 140 are disposed within the first short section 110 and mounted on the frame 130. The frame 130 may include a first mounting section 131, a heat insulation section 132, and a second mounting section 133 along its length. The heat insulation section 132 is used to heat-insulate the connection between the first mounting section 131 and the second mounting section 133. Since the power supply unit 141 generates a lot of heat when it is working, the heat insulation section 132 can reduce the heat transfer to the second mounting section 133. The main control unit 142 is mounted on the end of the second mounting section 133 facing the first mounting section 131, and the auxiliary focusing unit 145 is mounted on the end of the second mounting section 133 away from the first mounting section 131. In this way, there is no need to change the mounting positions of the signal generation unit 143, the current potential acquisition unit 144, the auxiliary focusing unit 145, and the preamplifier unit 146, and the modifications to the circuit units 140 are minimal.

[0064] In one possible implementation, the acoustic logging assembly 300 further includes an electronic circuit unit and an acoustic system unit, with the electronic circuit unit located in the second subsection 210 and the acoustic system unit located in the fifth subsection 320.

[0065] Thus, the acoustic unit located in the fifth short section 320 can transmit and receive acoustic signals, the electronic circuit unit located in the second short section 210 can be used to control and analyze acoustic signals, and the fifth power supply electrode is located in the second short section 210. There will be no significant mutual influence between the acoustic field and the electric field of the composite logging device.

[0066] In some embodiments, the composite logging device provided in this application also includes a connector, and the array lateral logging component 100 and the wellbore pushing component 200, as well as the array lateral logging component 100 and the sonic logging component 300, are electrically connected through the connector.

[0067] Thus, due to the electrical connection between the array lateral logging component 100, the caliper push component 200, and the acoustic logging component 300, data can be transmitted between them. Before starting measurements with the composite logging device, the array lateral logging component 100, the caliper push component 200, and the acoustic logging component 300 in the composite logging device can be functionally debugged. For example, it can be tested whether the electrode unit 120 of the array lateral logging component 100 can transmit current normally, whether the push arm 220 of the caliper push component 200 can open and retract normally, and whether the acoustic logging component 300 can transmit and receive acoustic waves normally.

[0068] In one possible implementation, the connector is a 31-pin standard plug. It should be noted that in the prior art, the array side-up electron instrument and the array side-electrode system, as well as the array side-down electron instrument, are connected using 37-pin plugs. During commissioning, hardwiring is required to connect the array side-up electron instrument and the array side-down electron instrument, increasing the difficulty of commissioning. This application uses a 31-pin standard plug to connect the array side-logging assembly 100 with the caliper push assembly 200, and to connect the array side-logging assembly 100 with the sonic logging assembly 300, which is more convenient during commissioning.

[0069] It should be noted that the inclined logging assembly 400 and the caliper push assembly 200 can also be electrically connected via a 31-pin standard plug to facilitate the functional debugging of the inclined logging assembly 400.

[0070] In one possible implementation, the composite logging device provided in this application may further include at least one of a natural gamma detection component, a three-dimensional induction detection component, and an array induction detection component. The natural gamma detection component is connected to the end of the fourth sub-section 410 opposite to the second sub-section 210, and the three-dimensional induction detection component and the array induction detection component are connected to the end of the fifth sub-section 320 opposite to the third sub-section 310.

[0071] Since the array lateral logging component 100, the caliper push component 200 and the sonic logging component 300 share a part of the structure, the composite logging device can also be combined with other logging instruments, such as natural gamma detection components, three-dimensional sensing detection components and array detection sensing components. In this way, more parameters can be detected in one well run, which can effectively improve the timeliness of the composite logging device.

[0072] Reference Figure 2As shown, in some embodiments, the electrode unit 120 may further include 12 monitoring electrodes 122, the monitoring electrodes 122 including a main monitoring electrode pair, a first monitoring electrode pair, a second monitoring electrode pair, a third monitoring electrode pair, a fourth monitoring electrode pair and a fifth monitoring electrode pair, the main monitoring electrode pair, the first monitoring electrode pair, the second monitoring electrode pair, the third monitoring electrode pair, the fourth monitoring electrode pair and the fifth monitoring electrode pair are all disposed on the first short section 110.

[0073] The current emitted by the power supply electrode 121 generates a potential difference when it passes through the formation. The monitoring electrode 122 can collect the formation potential difference signal. Thus, a total of 12 monitoring electrodes 122 (main monitoring electrode pair, first monitoring electrode pair, second monitoring electrode pair, third monitoring electrode pair, fourth monitoring electrode pair and fifth monitoring electrode pair) and 13 power supply electrodes 121 (main current electrode, first power supply electrode pair, second power supply electrode pair, third power supply electrode pair, fourth power supply electrode pair and fifth power supply electrode pair) together form the electrode unit 120, thereby enabling the array lateral logging component 100 to acquire multiple resistivity curves from the formation invasion zone to the original formation.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A composite logging device, characterized in that, The system includes an array lateral logging assembly, a caliper push-pull assembly, and an acoustic logging assembly. The array lateral logging assembly includes a first subsection, a frame, a circuit unit, and an electrode unit. The frame and the circuit unit are both disposed within the first subsection. The frame is connected to the first subsection, and the circuit unit is connected to the frame. The electrode unit includes a main current electrode, a first power supply electrode pair, a second power supply electrode pair, a third power supply electrode pair, a fourth power supply electrode pair, and a fifth power supply electrode pair. The main current electrode, the first power supply electrode pair, the second power supply electrode pair, the third power supply electrode pair, and the fourth power supply electrode are all disposed within the first subsection. The fifth power supply electrode pair includes two fifth power supply electrodes, the wellbore pushing assembly includes a second short section, the sonic logging assembly includes a third short section, and the two ends of the first short section are respectively connected to the second short section and the third short section, so that the second short section and the third short section respectively serve as the two fifth power supply electrodes of the array lateral logging assembly.

2. The composite logging device according to claim 1, characterized in that, It also includes a continuous inclination logging assembly, which includes a fourth short section; the sonic logging assembly also includes a fifth short section; the electrode unit also includes a sixth power supply electrode pair, which includes two sixth power supply electrodes. The fourth short section is connected to the end of the second short section opposite to the first short section, so that the fourth short section acts as a sixth power supply electrode of the array lateral logging assembly, and the fifth short section is connected to the end of the third short section opposite to the first short section, so that the fifth short section acts as another sixth power supply electrode of the array lateral logging assembly.

3. The composite logging device according to claim 1 or 2, characterized in that, It also includes a metal spring, through which both the second and third short sections are electrically connected to the first short section.

4. The composite logging device according to claim 2, characterized in that, It also includes an insulating short section, wherein the fourth short section is insulatedly connected to the second short section through the insulating short section, and the fifth short section is insulatedly connected to the third short section through the insulating short section.

5. The composite logging device according to claim 1 or 2, characterized in that, The circuit unit includes a power supply unit, a main control unit, a signal generation unit, a current and potential acquisition unit, an auxiliary focusing unit, and a preamplifier unit that are connected to each other. The frame includes a first mounting section, a heat insulation section, and a second mounting section connected in sequence along its own length. The power supply unit is connected to the end of the first mounting section near the second mounting section. The main control unit, the signal generation unit, the current potential acquisition unit, the auxiliary focusing unit, and the preamplifier unit are all connected to the second mounting section. The main control unit is located at the end of the second mounting section facing the first mounting section, and the auxiliary focusing unit is located at the end of the second mounting section away from the first mounting section.

6. The composite logging device according to claim 2 or 4, characterized in that, The acoustic logging assembly further includes an electronic circuit unit and an acoustic system unit, with the electronic circuit unit located in the second short section and the acoustic system unit located in the fifth short section.

7. The composite logging device according to claim 1 or 2, characterized in that, It also includes connectors, through which the array lateral logging assembly and the wellbore push assembly, as well as the array lateral logging assembly and the sonic logging assembly, are electrically connected.

8. The composite logging device according to claim 7, characterized in that, The connector is a 31-pin standard plug.

9. The composite logging device according to claim 2, characterized in that, It also includes at least one of a natural gamma detection component, a three-dimensional sensing detection component, and an array detection sensing component; The natural gamma detection component is connected to the end of the fourth segment away from the second segment, and the three-dimensional sensing detection component and the array sensing detection component are connected to the end of the fifth segment away from the third segment.

10. The composite logging device according to claim 1 or 2, characterized in that, The electrode unit further includes a main supervisory electrode pair, a first supervisory electrode pair, a second supervisory electrode pair, a third supervisory electrode pair, a fourth supervisory electrode pair, and a fifth supervisory electrode pair, all of which are disposed in the first short section.

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