Composite logging device

Abstract

A composite logging device, which relates to the technical field of oil and gas logging equipment. The composite logging device comprises an array lateral logging assembly (100), a caliper pushing assembly (200) and an acoustic logging assembly (300), wherein the array lateral logging assembly (100) comprises a first sub (110), a framework (130), a circuit unit (140) and an electrode unit (120); the framework (130) and the circuit unit (140) are both arranged inside the first sub (110), with the framework (130) being connected to the first sub (110), and the circuit unit (140) being connected to the framework (130); the electrode unit (120) 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, with the fifth power supply electrode pair comprising fifth power supply electrodes; the caliper pushing assembly (200) comprises a second sub (210); the acoustic logging assembly (300) comprises a third sub (310); and two ends of the first sub (110) are respectively connected to the second sub (210) and the third sub (310), such that the second sub (210) and the third sub (310) serve as two fifth power supply electrodes of the array lateral logging assembly (100). Such a configuration enables the composite logging device to have a relatively small length and weight, and relatively low manufacturing costs.

Description

Composite logging device

[0001] Cross-references of related documents

[0002] The present application claims priority to the Chinese patent application No. 202410659418.7, filed on May 24, 2024, and entitled "Composite logging device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of oil and gas logging equipment, and in particular to a composite logging device. BACKGROUND

[0004] At present, lateral instrument and acoustic instrument are indispensable in oil and gas logging, and are combined with inclined and four-arm caliper instruments. The instrument string can obtain formation resistivity and porosity, and can also measure important parameters such as X-direction caliper CALX, Y-direction caliper CALY, inclination angle and azimuth angle. The connection order of the instrument string in the prior art is straight-through hard electrode + SP ring hard electrode + remote gamma short section + inclined caliper electronic instrument + four-arm caliper pusher + array lateral upper electronic instrument + array lateral electrode system + array lateral lower electronic instrument + digital acoustic instrument.

[0005] However, the logging method in the prior art has the following disadvantages: first, the combined length of the instrument string is about 27m, which makes it difficult to log for high-risk wells, and thus accidents are likely to occur. Moreover, since the short sections of each instrument in the instrument string are made of pressure-resistant materials, the longer the length, the higher the manufacturing cost of the short section, thereby increasing the cost of the instrument string. Second, the weight of the entire instrument string is about 600KG, which is prone to cause the instrument string to be blocked and stuck during logging, thereby increasing the risk rate during construction. Finally, due to the long combined length and large overall weight of the instrument string, it cannot be further combined with other instruments, thereby limiting the timeliness of logging. SUMMARY

[0006] Therefore, the present application provides a composite logging device, which has a small overall length and overall weight and a low manufacturing cost.

[0007] The application provides a composite logging device, which comprises an array lateral logging assembly, a caliper pushing assembly and an acoustic logging assembly, the array lateral 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, the framework is connected to the first short section, the circuit unit is connected to the framework, 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 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 arranged in the first short section;

[0008] The fifth power supply electrode pair comprises two fifth power supply electrodes, the caliper 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 respectively, so that the second short section and the third short section respectively serve as two fifth power supply electrodes of the array lateral logging assembly.

[0009] In a possible implementation, the composite logging device provided by the application further comprises a dipmeter assembly, the dipmeter assembly comprises a fourth short section, the acoustic logging assembly further comprises a fifth short section, and the electrode unit further comprises a sixth power supply electrode pair, the sixth power supply electrode pair comprises two sixth power supply electrodes;

[0010] The fourth short section is connected to one end of the second short section away from the first short section, so that the fourth short section serves as one sixth power supply electrode of the array lateral logging assembly, and the fifth short section is connected to one end of the third short section away from the first short section, so that the fifth short section serves as another sixth power supply electrode of the array lateral logging assembly.

[0011] In a possible implementation, the composite logging device provided by the application further comprises a metal spring, and the second short section and the third short section are electrically connected with the first short section through the metal spring.

[0012] In a possible implementation, the composite logging device provided by the application further comprises an insulating short section, the fourth short section is insulatively connected with the second short section through the insulating short section, and the fifth short section is insulatively connected with the third short section through the insulating short section.

[0013] In a possible implementation, the circuit unit comprises a power supply unit, a master control unit, a signal generation unit, a current potential acquisition unit, an auxiliary focusing unit and a preamplifier unit which are connected with each other, and the framework comprises a first mounting section, a heat insulation section and a second mounting section which are connected in sequence along the length direction of the framework.

[0014] The power supply unit is connected to one end of the first mounting section close to the second mounting section, the main control unit, the signal generating unit, the current potential collecting unit, the auxiliary focusing unit and the preamplification unit are connected to the second mounting section, and the main control unit is arranged at one end of the second mounting section facing the first mounting section, and the auxiliary focusing unit is arranged at one end of the second mounting section away from the first mounting section.

[0015] In a possible implementation, the acoustic logging assembly further comprises an electronic circuit unit and an acoustic system unit, the electronic circuit unit is arranged in the second short section, and the acoustic system unit is arranged in the fifth short section.

[0016] In a possible implementation, the composite logging device provided by the application further comprises a joint, the array lateral logging assembly and the caliper pushing assembly are electrically connected through the joint, and the array lateral logging assembly and the acoustic logging assembly are electrically connected through the joint.

[0017] In a possible implementation, the joint is a 31-core standard plug.

[0018] In a possible implementation, the composite logging device provided by the application further comprises at least one of a natural gamma ray detection assembly, a three-dimensional induction detection assembly and an array induction detection assembly.

[0019] The natural gamma ray detection assembly is connected to one end of the fourth short section away from the second short section, and the three-dimensional induction detection assembly and the array induction detection assembly are connected to one end of the fifth short section away from the third short section.

[0020] In a possible implementation, the electrode unit further comprises a main supervision electrode pair, a first supervision electrode pair, a second supervision electrode pair, a third supervision electrode pair, a fourth supervision electrode pair and a fifth supervision electrode pair, and the main supervision electrode pair, the first supervision electrode pair, the second supervision electrode pair, the third supervision electrode pair, the fourth supervision electrode pair and the fifth supervision electrode pair are arranged in the first short section.

[0021] The composite logging device provided by the application comprises an array lateral logging assembly, a caliper pushing assembly and an acoustic logging assembly, the array lateral logging assembly comprises a first short section, a skeleton, a circuit unit and an electrode unit, 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 caliper pushing assembly comprises a second short section, and the acoustic logging assembly comprises a third short section, the first short section is arranged to mount 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 skeleton is arranged to mount the circuit unit, the circuit unit is arranged to control the array lateral logging assembly to detect, the second short section is arranged to mount a pushing component of the caliper pushing assembly and simultaneously acts as one of the fifth power supply electrodes of the fifth power supply electrode pair, and the third short section is arranged to mount a detection component of the acoustic logging assembly and simultaneously acts as the other of the fifth power supply electrodes of the fifth power supply electrode pair, so that the array lateral logging assembly shares part of the structure with the caliper pushing assembly and the acoustic logging assembly, and the length, weight and manufacturing cost of the array lateral logging assembly are reduced, thereby reducing the overall length, overall weight and manufacturing cost of the composite logging device.

[0022] In addition to the technical problems solved by the embodiments of the application described above, the technical features constituting the technical solutions and the beneficial effects brought by the technical features, other technical problems solved by the composite logging device provided by the application, other technical features included in the technical solutions and the beneficial effects brought by the technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0024] Fig. 1 is a structural schematic view of the composite logging device provided by the embodiment of the application;

[0025] Fig. 2 is a structural schematic view of the array lateral logging assembly in Fig. 1;

[0026] Fig. 3 is a structural schematic view of the caliper pushing assembly in Fig. 1;

[0027] Fig. 4 is a structural schematic view of the acoustic logging assembly and the insulating short section in Fig. 1;

[0028] Fig. 5 is a structural schematic view of the skeleton and the circuit unit in the composite logging device provided by the embodiment of the application;

[0029] Fig. 6 is a structural schematic diagram of the inclined logging assembly and the insulation short section in Fig. 1.

[0030] Legend: 100 - array lateral logging assembly; 110 - first short section; 120 - electrode unit; 121 - power supply electrode; 122 - supervision electrode; 130 - skeleton; 131 - first mounting section; 132 - heat insulation section; 133 - second mounting section; 140 - circuit unit; 141 - power supply unit; 142 - master control unit; 143 - signal generation unit; 144 - current potential acquisition unit; 145 - auxiliary focusing unit; 146 - preamplification unit; 200 - caliper pushing assembly; 210 - second short section; 220 - pushing arm; 300 - acoustic logging assembly; 310 - third short section; 320 - fifth short section; 400 - inclined logging assembly; 410 - fourth short section; 500 - insulation short section. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings of the preferred embodiments of the present application. In the drawings, the same or similar notations represent the same or similar components or components with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or indirect connection through an intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0034] The terms "first", "second", "third" (if any) in the description and claims of this application and above drawings are used to distinguish similar objects, and are not necessarily used to describe a particular sequential or chronological order. It should be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the application described herein can be carried out in other than the order shown or described herein.

[0035] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a list of steps or units not necessarily limited to those clearly identified, but can include other not clearly recited steps or units inherent in such processes, methods, products, or displays.

[0036] At present, the use of lateral instruments, acoustic wave type instruments for logging is an indispensable category in oil and gas logging, and the combination of the inclined and four-arm caliper instruments, which can obtain formation resistivity and porosity while measuring important parameters such as X-direction caliper CALX, Y-direction caliper CALY, inclination angle and azimuth angle of the borehole, can be achieved by once running the instrument string into the well. The connection order of the instrument string in the prior art is straight-through hard electrode + SP ring hard electrode + remote gamma short section + inclined caliper electronic instrument + four-arm caliper pusher + array lateral upper electronic instrument + array lateral electrode system + array lateral lower electronic instrument + digital acoustic wave instrument.

[0037] However, the logging method in the prior art has the following disadvantages: first, the combined length of the instrument string is about 27m, which makes it difficult to log for high-risk wells, and thus is prone to cause accidents, and since the short sections of each instrument in the instrument string are made of pressure-resistant materials, the longer the length is, the higher the manufacturing cost of the short section is, thereby increasing the cost of the instrument string. Second, the weight of the entire instrument string is about 600KG, which is prone to cause the instrument string to be blocked or stuck during logging, thereby increasing the risk rate during construction. Finally, due to the long combined length and large overall weight of the instrument string, it cannot be further combined with other instruments, thereby limiting the timeliness of logging.

[0038] In the process, the applicant finds that, due to the high length proportion and weight proportion of the build-up caliper electronic instrument, the four-arm caliper pusher, the array lateral up electronic instrument, the array lateral electrode system, the array lateral down electronic instrument and the digital sonic instrument in the whole instrument string, under the premise of ensuring the logging function of the instrument string, focusing on reducing the length and weight of one or two of the build-up caliper electronic instrument, the four-arm caliper pusher, the array lateral up electronic instrument, the array lateral electrode system, the array lateral down electronic instrument and the digital sonic instrument can effectively reduce the overall length and overall weight of the instrument string, thereby improving the logging timeliness of the instrument string and reducing the manufacturing cost of the instrument string.

[0039] Therefore, the embodiment of the present application provides a composite logging device, which comprises an array lateral logging assembly, a caliper push assembly and a sonic logging assembly, wherein a second short section of the caliper push assembly is used as a fifth power supply electrode of the array lateral logging assembly, a third short section of the sonic logging assembly is used as another fifth power supply electrode of the array lateral logging assembly, and a circuit unit of the array lateral logging assembly is arranged in the first short section, so that the array lateral logging assembly and the caliper push assembly and the sonic logging assembly and the common part structure can be shared, and then the array lateral up electronic instrument and the array lateral down electronic instrument in the prior art can be cancelled, and then the length and weight of the array lateral logging assembly can be reduced, thereby reducing the overall length, overall weight and manufacturing cost of the composite logging device.

[0040] The specific implementation of the composite logging device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0041] Referring to FIGS. 1-5, the composite logging device provided by the present application comprises an array lateral logging assembly 100, a caliper push assembly 200 and a sonic logging assembly 300, the array lateral logging assembly 100 comprises a first short section 110, a skeleton 130, a circuit unit 140 and an electrode unit 120, the skeleton 130 and the circuit unit 140 are arranged in the first short section 110, the skeleton 130 is connected to the first short section 110, the circuit unit 140 is connected to the skeleton 130, the electrode unit 120 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 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 arranged in the first short section 110.

[0042] The fifth power supply electrode pair includes two fifth power supply electrodes, the well diameter pushing assembly 200 includes a second short section 210, the acoustic logging assembly 300 includes a third short section 310, and the two ends of the first short section 110 are connected with the second short section 210 and the third short section 310 respectively, so that the second short section 210 and the third short section 310 respectively serve as the two fifth power supply electrodes of the array lateral logging assembly 100.

[0043] It can be understood that, in the present application, the array lateral logging assembly 100 can be used to quantitatively describe thin layer and formation invasion characteristics, measure formation resistivity, invert formation invasion parameters and true resistivity, and calculate formation oil saturation. Compared with the dual lateral logging which can only provide two logging curves of deep and shallow, the array lateral logging can provide five logging curves of different detection depths, and can effectively realize the identification and evaluation of complex oil and gas layers. The well diameter pushing assembly 200 is used to push the composite logging device as a whole to one side of the well wall and tightly adhere to the well wall, and the acoustic logging assembly 300 can be used to obtain formation porosity and formation contrast, etc. The acoustic logging assembly 300 of the present application can adopt digital acoustic waves. Compared with array acoustic waves, digital acoustic waves have the advantages of high reliability and strong anti-interference ability.

[0044] In the present application, the electrode unit 120 can have 13 power supply electrodes 121 and 12 supervision electrodes 122, that is, the electrode unit 120 can 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. 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 each include two power supply electrodes 121, and the two power supply electrodes 121 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 are distributed on the two sides of the main current electrode. In the present application, 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 totally have 9 power supply electrodes 121 arranged in the first short section 110, which are the main detection components of the array lateral logging assembly 100, and one fifth power supply electrode of the fifth power supply electrode pair is arranged in the second short section 210 of the well diameter pushing 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.

[0045] It should be noted that the well diameter pushing assembly 200 can include a pushing arm 220 and a driving motor, the driving motor is arranged in the second short section 210, the pushing arm 220 is movably connected to the second short section 210, and the pushing arm 220 can be opened or closed relative to the second short section 210 under the driving of the driving motor.

[0046] In the prior art, the signal generator board, the current potential acquisition board and the preamplification board of the array lateral instrument are arranged in the electrode system, the power supply board and the main control board are arranged in the array lateral upper electronic instrument, and the auxiliary focusing board is arranged in the array lateral lower electronic instrument. In the present application, the circuit unit 140 can include 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 preamplification unit 146. The circuit unit 140 can be used to power the electrode unit 120, control the electrode unit 120 to emit signals and process the signals collected by the electrode unit 120. The power supply unit 141, the main control unit 142, the signal generation unit 143, the current potential acquisition unit 144, the auxiliary focusing unit 145 and the preamplification unit 146 are all arranged 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 further serve as the secondary detection component of the array lateral logging assembly 100. In this way, the array lateral upper electronic instrument and the array lateral lower electronic instrument in the prior art can be cancelled, and the length and the weight of the array lateral logging assembly 100 are reduced, thereby reducing the overall length, the overall weight and the manufacturing cost of the composite logging device.

[0047] In the prior art, the length of the array lateral upper electronic instrument is about 1.7 m, the weight is about 37.2 Kg, and the manufacturing cost is about 50,000 RMB. The length of the array lateral lower electronic instrument is about 1.3 m, the weight is about 21.9 Kg, and the manufacturing cost is about 50,000 RMB. If the array lateral upper electronic instrument and the array lateral lower electronic instrument are cancelled, the length of the composite logging device can be reduced by about 3 m, the weight can be reduced by about 59.1 Kg, and the manufacturing cost can be reduced by about 100,000 RMB. The length, the weight and the manufacturing cost of the composite logging device of the present application are all obviously reduced compared with the instrument string in the prior art.

[0048] The composite logging device provided by the embodiment of the present application comprises an array lateral logging assembly 100, a caliper pushing assembly 200 and an acoustic logging assembly 300. The array lateral logging assembly 100 comprises a first short section 110, a skeleton 130, a circuit unit 140 and an electrode unit 120. The electrode unit 120 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 caliper pushing assembly 200 comprises a second short section 210. The acoustic logging assembly 300 comprises a third short section 310. The first short section 110 is arranged to mount 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 skeleton 130 is arranged to mount the circuit unit 140. The circuit unit 140 is arranged to control the array lateral logging assembly 100 to detect. The second short section 210 is arranged to mount a pushing component of the caliper pushing assembly 200, and simultaneously acts as one of the fifth power supply electrodes of the fifth power supply electrode pair. The third short section 310 is arranged to mount a detecting component of the acoustic logging assembly 300, and simultaneously acts as the other of the fifth power supply electrodes of the fifth power supply electrode pair. Thus, the array lateral logging assembly 100 shares part of the structure with the caliper pushing assembly 200 and the acoustic logging assembly 300, thereby reducing the length, weight and manufacturing cost of the array lateral logging assembly 100, and reducing the overall length, overall weight and manufacturing cost of the composite logging device.

[0049] Referring to FIG. 1 and FIG. 6, in a possible implementation, the composite logging device provided by the present application further comprises a dipmeter assembly 400. The dipmeter assembly 400 comprises a fourth short section 410. The acoustic logging assembly 300 further comprises a fifth short section 320. The electrode unit 120 further comprises a sixth power supply electrode pair. The sixth power supply electrode pair comprises two sixth power supply electrodes.

[0050] The fourth short section 410 is connected to one end of the second short section 210 away from the first short section 110, so that the fourth short section 410 acts as one of the sixth power supply electrodes of the array lateral logging assembly 100. The fifth short section 320 is connected to one end of the third short section 310 away from the first short section 110, so that the fifth short section 320 acts as the other of the sixth power supply electrodes of the array lateral logging assembly 100.

[0051] It can be understood that the inclination logging assembly 400 can be used to measure the inclination angle and azimuth angle of the wellbore, and the inclination logging assembly 400 can include a fourth short section 410 for mounting the detection components of the inclination logging assembly 400, and the acoustic logging assembly 300 can include two parts of the third short section 310 and the fifth short section 320. When the acoustic logging assembly 300 adopts a digital acoustic wave mode, it can include an electronic circuit unit and an acoustic system unit, and the electronic circuit unit and the acoustic system unit are connected through a joint to enable data transmission between the two. The acoustic system unit can include a transmitting transducer and a receiving transducer, the transmitting transducer is used to transmit acoustic wave signals, and the receiving transducer is used to receive acoustic wave signals. The electronic circuit unit can include a master control module and a collection module, etc. The master control module is used to generate and transmit control signals, and the collection module is used to periodically collect acoustic wave signals and perform digital-to-analog conversion.

[0052] Since the array lateral logging assembly 100 has 13 power supply electrodes 121, wherein 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, two fifth power supply electrodes are respectively located in the second short section 210 and the third short section 310, and in the related art, a long empty short section is arranged at the lower end of the array lateral electronic instrument as a 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 way not only increases the length and weight of the entire instrument string, but also the manufacturing cost of the short section is relatively high, which increases the overall manufacturing cost of the instrument string.

[0053] In the present application, the fourth short section 410 of the inclination 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 acoustic logging assembly 300 is used as the other sixth power supply electrode of the sixth power supply electrode pair, so that the empty short section in the prior art can be cancelled, thereby reducing the length, weight and manufacturing cost of the array lateral logging assembly 100, and thus reducing the overall length, overall weight and manufacturing cost of the composite logging device. At the same time, the detection functions of the composite logging device can still be normally realized.

[0054] It should be understood that the array lateral logging assembly 100 adopts a plurality of electrode arrangements, and different detection depth measurements are simultaneously realized by changing the positions of the power supply electrodes 121 and the monitoring electrodes 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 pair needs to form a loop 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 by the present application further comprises a metal spring, and the second short section 210 and the third short section 310 are electrically connected to the first short section 110 through the metal spring.

[0055] In this way, the first short section 110 and the second short section 210 are short-circuit connected, and the first short section 110 and the third short section 310 are short-circuit connected, so as to facilitate the current to flow between the first short section 110, the second short section 210 and the third short section 310, and further enable 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 loop with the main current electrode located in the first short section 110.

[0056] Referring to FIGS. 1, 4 and 6, in a possible implementation, the composite logging device provided by the present application further comprises an insulating short section 500, the fourth short section 410 is insulatively connected to the second short section 210 through the insulating short section 500, and the fifth short section 320 is insulatively connected to the third short section 310 through the insulating short section 500.

[0057] It should be noted that since the fifth power supply electrode needs to be insulatively isolated from the sixth power supply electrode, and the fifth power supply electrode is located in the second short section 210 and the third short section 310, and the sixth power supply electrode is located in the fourth short section 410 and the fifth short section 320, therefore, the insulating short section 500 is arranged between the second short section 210 and the fourth short section 410, and the insulating short section 500 is arranged between the third short section 310 and the fifth short section 320, so as to isolate the fifth power supply electrode and the sixth power supply electrode from each other, thereby normally realizing the detection function of the array lateral logging assembly 100.

[0058] Referring to FIG. 5, in a possible implementation, the circuit unit 140 comprises a power supply unit 141, a master control unit 142, a signal generation unit 143, a current potential acquisition unit 144, an auxiliary focusing unit 145 and a preamplification unit 146 which are connected to each other, and the skeleton 130 comprises a first mounting section 131, a heat insulation section 132 and a second mounting section 133 which are connected in sequence along the length direction of the skeleton 130.

[0059] The power supply unit 141 is connected to the first mounting section 131 near one end of the second mounting section 133, the main control unit 142, the signal generating unit 143, the current potential collecting unit 144, the auxiliary focusing unit 145 and the preamplification unit 146 are all connected to the second mounting section 133, and the main control unit 142 is arranged at one end of the second mounting section 133 facing the first mounting section 131, and the auxiliary focusing unit 145 is arranged at one end of the second mounting section 133 away from the first mounting section 131.

[0060] Therefore, in the present application, the circuit units 140 are all arranged in the first short section 110 and mounted on the skeleton 130, the skeleton 130 can include the first mounting section 131, the heat insulation section 132 and the second mounting section 133 along the length direction of the skeleton 130, the heat insulation section 132 is used to insulate and connect the first mounting section 131 and the second mounting section 133, since the power supply unit 141 generates a large amount of heat during operation, the heat insulation section 132 can reduce the heat transfer to the second mounting section 133, the main control unit 142 is mounted at one end of the second mounting section 133 facing the first mounting section 131, and the auxiliary focusing unit 145 is mounted at one end of the second mounting section 133 away from the first mounting section 131, so that the installation positions of the signal generating unit 143, the current potential collecting unit 144, the auxiliary focusing unit 145 and the preamplification unit 146 do not need to be changed, and the circuit units 140 are less changed.

[0061] In a possible implementation, the acoustic logging assembly 300 further includes an electronic circuit unit and an acoustic system unit, the electronic circuit unit is arranged in the second short section 210, and the acoustic system unit is arranged in the fifth short section 320.

[0062] In this way, the acoustic system unit arranged in the fifth short section 320 can emit and receive acoustic signals, the electronic circuit unit arranged in the second short section 210 can be used to control and analyze the acoustic signals, and the fifth power supply electrode is arranged in the second short section 210, so that there is no obvious mutual influence between the acoustic field and the electric field of the composite logging device.

[0063] In some embodiments, the composite logging device provided in the present application further includes a joint, the array lateral logging assembly 100 and the caliper pushing assembly 200 are electrically connected through the joint, and the array lateral logging assembly 100 and the acoustic logging assembly 300 are also electrically connected through the joint.

[0064] Thus, due to the electrical connection between the array lateral logging assembly 100, the caliper push assembly 200 and the acoustic logging assembly 300, data can be transmitted between the array lateral logging assembly 100, the caliper push assembly 200 and the acoustic logging assembly 300, and the array lateral logging assembly 100, the caliper push assembly 200 and the acoustic logging assembly 300 in the composite logging device can be collectively debugged before starting to use the composite logging device to measure, for example, whether the electrode unit 120 of the array lateral logging assembly 100 can normally emit current, whether the push arm 220 of the caliper push assembly 200 can normally open and retract, whether the acoustic logging assembly 300 can normally emit and receive acoustic waves, and the like.

[0065] In a possible implementation, the joint is a 31-core standard plug. It should be noted that in the prior art, a 37-core plug is used to connect the array lateral upper electronic instrument and the array lateral electrode system, and the array lateral electrode system and the array lateral lower electronic instrument, and when debugging, hard-wired connection is required to connect the array lateral upper electronic instrument and the array lateral lower electronic instrument, which increases the difficulty of debugging. In the present application, a 31-core standard plug is used to connect the array lateral logging assembly 100 and the caliper push assembly 200, and to connect the array lateral logging assembly 100 and the acoustic logging assembly 300, which is more convenient when debugging.

[0066] It should be noted that the deviated logging assembly 400 and the caliper push assembly 200 can also be electrically connected through a 31-core standard plug to facilitate the functional debugging of the deviated logging assembly 400.

[0067] In a possible implementation, the composite logging device provided by the present application can further include at least one of a natural gamma detection assembly, a three-dimensional induction detection assembly and an array induction detection assembly. The natural gamma detection assembly is connected to the fourth short section 410 away from one end of the second short section 210, and the three-dimensional induction detection assembly and the array induction detection assembly are connected to the fifth short section 320 away from one end of the third short section 310.

[0068] Since the array lateral logging assembly 100, the caliper push assembly 200 and the acoustic logging assembly 300 share a part of the structure, the composite logging device can further combine other logging instruments, for example, the natural gamma detection assembly, the three-dimensional induction detection assembly and the array induction detection assembly. Thus, more parameters can be detected at one time, and the timeliness of the composite logging device can be effectively improved.

[0069] Referring to FIG. 2, in some embodiments, the electrode unit 120 can further include 12 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, which are all arranged in the first short section 110.

[0070] The current emitted by the power supply electrodes 121 generates a potential difference when passing through the formation, and the monitoring electrodes 122 can collect the formation potential difference signal, so that 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, a total of 12 monitoring electrodes 122, and the main current electrode, 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 pair, a total of 13 power supply electrodes 121, together constitute the electrode unit 120, and thus the array lateral logging assembly 100 can obtain multiple resistivity curves of the formation invasion zone to the original formation.

[0071] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A composite logging device, characterized in that, The array lateral logging assembly, the caliper pushing assembly and the acoustic logging assembly, the array lateral logging assembly comprises a first short section, a skeleton, a circuit unit and an electrode unit, the skeleton and the circuit unit are arranged in the first short section, the skeleton is connected to the first short section, the circuit unit is connected to the skeleton, 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 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 arranged in the first short section; The fifth power supply electrode pair comprises two fifth power supply electrodes, the caliper pushing assembly comprises a second short section, the acoustic logging assembly comprises a third short section, the two ends of the first short section are connected with the second short section and the third short section respectively, so that the second short section and the third short section respectively serve as two fifth power supply electrodes of the array lateral logging assembly.

2. The composite logging device of claim 1, wherein, Further comprising a continuous inclined logging assembly, the continuous inclined logging assembly comprises a fourth short section, the acoustic logging assembly further comprises a fifth short section, the electrode unit further comprises a sixth power supply electrode pair, the sixth power supply electrode pair comprises two sixth power supply electrodes; The fourth short section is connected to one end of the second short section away from the first short section, so that the fourth short section serves as one sixth power supply electrode of the array lateral logging assembly, the fifth short section is connected to one end of the third short section away from the first short section, so that the fifth short section serves as another sixth power supply electrode of the array lateral logging assembly.

3. The composite logging device of claim 1 or 2, wherein, Further comprising a metal spring, the second short section and the third short section are electrically connected with the first short section through the metal spring.

4. The composite logging device of claim 2, wherein, Further comprising an insulating short section, the fourth short section is insulatedly connected with the second short section through the insulating short section, and the fifth short section is insulatedly connected with the third short section through the insulating short section.

5. The composite logging device of claim 1 or 2, wherein, The circuit unit comprises a power supply unit, a master control unit, a signal generation unit, a current potential acquisition unit, an auxiliary focusing unit and a preamplification unit which are connected with each other, and the skeleton comprises a first mounting section, a heat insulation section and a second mounting section which are connected in sequence along the length direction of the skeleton; The power supply unit is connected to one end of the first mounting section close to the second mounting section, the master control unit, the signal generation unit, the current potential acquisition unit, the auxiliary focusing unit and the preamplification unit are connected to the second mounting section, and the master control unit is arranged at one end of the second mounting section toward the first mounting section, and the auxiliary focusing unit is arranged at one end of the second mounting section away from the first mounting section.

6. The composite logging device of claim 2 or 4, wherein, The acoustic logging assembly further comprises an electronic circuit unit and a sound system unit, the electronic circuit unit is arranged in the second short section, and the sound system unit is arranged in the fifth short section.

7. The composite logging device of claim 1 or 2, wherein, Further comprising a joint, the array lateral logging assembly and the caliper pushing assembly, and the array lateral logging assembly and the acoustic logging assembly are electrically connected through the joint.

8. The composite logging device of claim 7, wherein, The connector is a 31-core standard plug.

9. The composite logging device of claim 2, wherein, Further comprising at least one of a natural gamma ray detection assembly, a three-dimensional induction detection assembly and an array induction detection assembly; The natural gamma ray detection assembly is connected to one end of the fourth short section away from the second short section, and the three-dimensional induction detection assembly and the array induction detection assembly are connected to one end of the fifth short section away from the third short section.

10. The composite logging device of claim 1 or 2, wherein, The electrode unit further comprises a main supervision electrode pair, a first supervision electrode pair, a second supervision electrode pair, a third supervision electrode pair, a fourth supervision electrode pair and a fifth supervision electrode pair, which are all arranged in the first short section.

Images