Test system of oxygen activation water flow logging instrument

Abstract

The embodiment of the utility model discloses a testing system of an oxygen activation water flow logging instrument. The system comprises ground equipment, a front equipment group and a neutron generator simulation circuit, the neutron generator simulation circuit comprises an interface, a transformer, a preprocessing circuit, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor. The transformer is used for adjusting the output voltage of the transformer according to the target voltage control signal; the preprocessing circuit is used for preprocessing the output voltage signal of the transformer; the fourth resistor is consistent with the ion source resistance of a neutron generator of the oxygen activation water flow logging instrument, and the fifth resistor is consistent with the filament resistance of the neutron generator of the oxygen activation water flow logging instrument. According to the system, the neutron generator in the oxygen activation water flow logging instrument is simulated through the neutron generator simulation circuit, neutron excitation is not needed in the testing process, damage of radiation to testers is reduced, operation is easy and easy to implement, efficiency is high, consumption of the actual neutron generator can be reduced, and resources are saved.

Description

Technical Field

[0001] The embodiment of the utility model relates to the field of exploration technology, and in particular to a testing system for an oxygen-activated water flow logging instrument. Background Art

[0002] The New Oxygen Flow Inspection Tool (FIT) is an instrument used to measure water uptake by various layers in water or polymer injection wells. Due to its high reliability, the FIT is widely used in oilfield exploration.

[0003] An oxygen-activated flow logging tool (FIT) typically includes a neutron generator and other acquisition and transmission equipment. In some scenarios, it's necessary to detect whether the acquisition and transmission equipment in the FIT is faulty.

[0004] Because neutron generators are radioactive devices, to ensure personnel and environmental safety, existing techniques for testing oxygen-activated water flow logging instruments (FITs) require the instrument to be placed in a specific test barrel for target testing. However, this method is cumbersome and inefficient. Utility Model Content

[0005] In view of the above problems, embodiments of the present invention are proposed to provide a testing system for an oxygen-activated water flow logging instrument that overcomes the above problems or at least partially solves the above problems.

[0006] According to one aspect of the present application, a test system for an oxygen-activated water flow logging instrument is provided, comprising surface equipment and a front-end equipment group, the test system further comprising: a neutron generator simulation circuit;

[0007] The neutron generator simulation circuit includes: an interface, a transformer, a preprocessing circuit, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor;

[0008] Among them, the interface is connected to the front-end equipment group, the target voltage control signal output end of the interface is connected to the transformer input end, and the transformer output end is connected to the preprocessing circuit input end; the first output end of the preprocessing circuit is connected to the first end of the first resistor, and the second output end of the preprocessing circuit is connected to the second end of the third resistor; the second end of the first resistor is connected to the first end of the second resistor and the target voltage detection signal input end of the interface, and the second end of the second resistor is connected to the first end of the third resistor; the first end of the fourth resistor is connected to the anode voltage output end of the interface, and the second end of the fourth resistor is grounded; the first end of the fifth resistor is connected to the filament voltage output end of the interface, and the second end of the fifth resistor is grounded;

[0009] The transformer is used to adjust the transformer output voltage according to the target voltage control signal, and the preprocessing circuit is used to preprocess the transformer output voltage signal;

[0010] The fourth resistor is consistent with the ion source resistance of the neutron generator of the oxygen-activated water flow logging instrument, and the fifth resistor is consistent with the filament resistance of the neutron generator of the oxygen-activated water flow logging instrument;

[0011] The anode voltage output end of the interface is used to transmit the anode voltage signal to the ground equipment through the front-end equipment group, so that the ground equipment can display the anode current according to the anode voltage signal; the filament voltage output end of the interface is used to transmit the filament voltage signal to the ground equipment through the front-end equipment group, so that the ground equipment can display the filament current according to the filament voltage signal; the target pressure detection signal input end of the interface is used to transmit the target pressure detection signal to the ground equipment through the front-end equipment group, so that the ground equipment can display the target pressure according to the target pressure detection signal.

[0012] Optionally, the preprocessing circuit includes: a rectifier circuit and a filter circuit;

[0013] The input end of the rectifier circuit is connected to the output end of the transformer, and the output end of the rectifier circuit is connected to the input end of the filter circuit.

[0014] Optionally, the rectifier circuit includes: a first diode, a second diode, a third diode, and a fourth diode;

[0015] The cathode of the first diode and the anode of the second diode are connected to the first output terminal of the transformer, and the anode of the third diode and the cathode of the fourth diode are connected to the second output terminal of the transformer.

[0016] The cathode of the second diode and the cathode of the third diode are connected to the first end of the first resistor; the anode of the first diode and the anode of the fourth diode are connected to the second end of the third resistor.

[0017] Optionally, the filtering circuit includes: a first capacitor;

[0018] The first end of the first capacitor is connected to the first end of the first resistor, and the second end of the first capacitor is connected to the second end of the third resistor.

[0019] Optionally, the second resistor is a variable resistor.

[0020] Optionally, the fourth resistor and / or the fifth resistor is a variable resistor.

[0021] Optionally, the interface is connected to the front-end device group through a connector.

[0022] Optionally, the connector is detachably connected to the interface.

[0023] Optionally, a first fuse is connected to the input end of the transformer;

[0024] And / or, the first end of the fourth resistor is connected to a second fuse.

[0025] Optionally, the neutron generator simulation circuit is arranged in a preset protective box.

[0026] The present invention provides a testing system for an oxygen-activated water flow logging instrument. This system uses a neutron generator simulation circuit to simulate the neutron generator in the instrument. During testing, the neutron generator simulation circuit replaces the neutron generator and accurately obtains target voltage, anode current, and filament current, enabling testing of the instrument. Neutron excitation is not required during the testing process, minimizing radiation exposure to test personnel. The system is simple and easy to operate, highly efficient, and reduces the consumption of actual neutron generators, conserving resources.

[0027] The above description is only an overview of the technical solution of the embodiment of the utility model. In order to more clearly understand the technical means of the embodiment of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the utility model more obvious and easy to understand, the specific implementation method of the embodiment of the utility model is specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the embodiments of the present invention. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1 A schematic structural diagram of a test system for an oxygen-activated water flow logging instrument provided in an embodiment of the present application is shown;

[0030] Figure 2 A circuit diagram of a neutron generator simulation circuit provided in an embodiment of the present application is shown;

[0031] Figure 3 A circuit diagram of another neutron generator simulation circuit provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0032] The following describes exemplary embodiments of the present invention in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0033] Figure 1 The schematic diagram of the structure of a test system for an oxygen-activated water flow logging instrument provided in an embodiment of the present application is shown. The test system for an oxygen-activated water flow logging instrument provided in an embodiment of the present application can be used to perform fault testing on an oxygen-activated water flow logging instrument FIT.

[0034] Specifically, if Figure 1 As shown, the test system of the oxygen activated water flow logging tool includes: surface equipment 11, a front-end equipment group 12, and a neutron generator simulation circuit 13. The surface equipment 11 is connected to the neutron generator simulation circuit 13 through the front-end equipment group 12.

[0035] The surface equipment 11 and the front-end equipment group 12 are devices found in existing oxygen-activated water flow logging instruments. The surface equipment 11 is used to issue commands such as target pressure adjustment instructions, anode voltage control instructions, and ion source voltage control instructions, and can process and visualize signals transmitted by the front-end equipment group, such as the detected target voltage, anode current, and filament current. The front-end equipment group includes control and acquisition equipment, communication and transmission equipment, and other devices located between the surface equipment and the neutron generator in the oxygen-activated water flow logging instrument. In this application, the front-end equipment group is the control and acquisition, communication and transmission equipment located between the surface equipment 11 and the neutron generator simulation circuit 13, and is used for signal transmission, processing, and interaction between the surface equipment 11 and the neutron generator simulation circuit 13.

[0036] Unlike the prior art, the test system provided by this application replaces the neutron generator in the oxygen-activated water flow logging instrument with a neutron generator simulation circuit 13 in the embodiment of this application. This neutron generator simulation circuit 13 does not contain a neutron generator and does not perform actual neutron excitation operations. Instead, it simulates an actual neutron generator through a circuit, thereby achieving the purpose of testing the oxygen-activated water flow logging instrument without performing neutron excitation operations.

[0037] refer to Figure 2 The neutron generator simulation circuit 13 in the embodiment of the present application specifically includes: an interface J1, a transformer 131, a preprocessing circuit 132, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5.

[0038] Among them, the connection relationship between the various modules in the neutron generator simulation circuit 13 is as follows: the interface J1 is connected to the front-end equipment group 12, the target voltage control signal output end of the interface J1 is connected to the input end (primary end) of the transformer 131, and the output end of the transformer 131 is connected to the input end of the preprocessing circuit 132; the first output end of the preprocessing circuit 132 is connected to the first end of the first resistor R1, and the second output end of the preprocessing circuit 132 is connected to the second end of the third resistor R3; the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the target voltage detection signal input end of the interface J1, and the second end of the second resistor R2 is connected to the first end of the third resistor R3; the first end of the fourth resistor R4 is connected to the anode voltage output end of the interface J1, and the second end of the fourth resistor R4 is grounded; the first end of the fifth resistor R5 is connected to the filament voltage output end of the interface J1, and the second end of the fifth resistor R5 is grounded.

[0039] Specifically, interface J1 is connected to front-end equipment group 12. During the test of the oxygen-activated water flow logging instrument, surface equipment 11 issues a corresponding target pressure adjustment command. This target pressure adjustment command is processed and transmitted by front-end equipment group 12 to interface J1. The target pressure control signal output terminal of interface J1 outputs the corresponding target pressure control signal to transformer 131, which then adjusts the transformer output voltage according to the target pressure control signal. The present embodiment does not limit the type or model of the transformer.

[0040] The output end (secondary end) of the transformer 131 outputs a corresponding transformer output voltage signal, and the preprocessing circuit 132 preprocesses the voltage signal output by the transformer 131. The preprocessing includes rectification, filtering, etc., thereby improving the signal quality of subsequent signals.

[0041] The voltage output by the preprocessing circuit 132 is applied to the first end of the first resistor R1 and the second end of the third resistor R3. Among them, the first resistor R1 can act as a sampling resistor, and the first resistor can be a fixed resistor, that is, the resistance value of the first resistor is fixed for different oxygen-activated water flow logging instrument test processes. The current signal (referred to as the target pressure detection signal in this application) flowing through the first resistor R1 will flow to the target pressure detection signal input end of the interface J1 through the second end of the first resistor R1. The target pressure detection signal input end of the interface J1 transmits the target pressure detection signal to the ground equipment through the front-end equipment group 12, so that the ground equipment 11 can display the target pressure according to the target pressure detection signal. Specifically, the ground equipment 11 obtains the current target pressure based on the current value and the resistance value of the first resistor R1 in the target pressure detection signal, and visually displays the target pressure value, so that the tester can determine whether the current target pressure test result meets expectations based on the displayed target pressure value.

[0042] The third resistor R3 acts as a voltage divider and can be a fixed resistor, meaning its value remains constant for different oxygen-activated water flow logging instrument tests. The second resistor R2 is an adjustment resistor, used to adjust test accuracy and adapt to different oxygen-activated water flow logging instrument settings.

[0043] In an optional embodiment, to improve the testing accuracy of the oxygen-activated water flow logging instrument, enable rapid adaptation to different oxygen-activated water flow logging instruments, and enhance the scalability of the test system, the second resistor R2 in the embodiment of the present application is a variable resistor. For any oxygen-activated water flow logging instrument to be tested, the resistance value of the second resistor R2 adapted to the oxygen-activated water flow logging instrument is determined while the oxygen-activated water flow logging instrument is operating normally. Specifically, under the same target pressure adjustment instruction, the resistance value of the second resistor R2 is continuously changed. Based on the target pressure displayed by the surface equipment at different second resistor R2 values, the second resistor R2 value corresponding to the target pressure closest to the expected target pressure is determined. This second resistor R2 value is used as the second resistor R2 value matched to the oxygen-activated water flow logging instrument. During subsequent testing of the oxygen-activated water flow logging instrument, the second resistor R2 value is fixed to the corresponding value. That is, during the testing of a single oxygen-activated water flow logging instrument, the resistance value of the second resistor R2 is fixed. However, during the testing of different oxygen-activated water flow logging instruments, the resistance value of the second resistor R2 varies. For example, when testing the oxygen-activated water flow logging instrument FIT1, the resistance of the second resistor R2 is X1; when switching to testing the oxygen-activated water flow logging instrument FIT2, the resistance of the second resistor R2 is X2. Therefore, the second resistor R2 is a variable resistor, which can achieve fast switching.

[0044] The fourth resistor R4 is consistent with the ion source resistance of the neutron generator of the oxygen-activated water flow logging instrument, that is, the fourth resistor R4 simulates the ion source load of the neutron generator of the oxygen-activated water flow logging instrument. The anode voltage output terminal of the interface J1 outputs a corresponding anode voltage signal to the fourth resistor R4. The anode voltage output terminal of the interface J1 transmits the anode voltage signal to the surface equipment 11 through the front-end equipment group 12. The surface equipment 11 displays the anode current based on the anode voltage signal. Specifically, the anode current is obtained based on the voltage of the anode voltage signal and the resistance value of the fourth resistor R4. Therefore, the tester can intuitively determine whether the current anode current meets expectations based on the displayed anode current.

[0045] The fifth resistor R5 matches the filament resistance of the neutron generator in the oxygen-activated water flow logging instrument, simulating the filament load of the neutron generator in the oxygen-activated water flow logging instrument. The filament voltage output terminal of interface J1 outputs a corresponding filament voltage signal to the fifth resistor R5. This signal is then transmitted to the surface equipment 11 via the front-end equipment assembly 12. The surface equipment 11 displays the filament current based on the filament voltage signal. Specifically, the filament current is calculated based on the voltage of the filament voltage signal and the resistance value of the fifth resistor R5. This allows testers to intuitively determine whether the current filament current meets expectations based on the displayed filament current.

[0046] In an optional embodiment, in order to adapt to the testing of different oxygen activated water flow logging instruments, the rapid switching of the testing process of different oxygen activated water flow logging instruments is improved. The fourth resistor and / or the fifth resistor in this embodiment are variable resistors, that is, for each oxygen activated water flow logging instrument to be tested, the resistance values ​​of the fourth resistor R4 and the fifth resistor R5 that match it are determined according to the ion source resistance and the filament resistance of the neutron generator contained in the oxygen activated water flow logging instrument to be tested. That is, during the test process of the same oxygen activated water flow logging instrument, the resistance values ​​of the fourth resistor R4 and the fifth resistor R5 are fixed, but the resistance values ​​of the fourth resistor R4 and the fifth resistor R5 corresponding to different oxygen activated water flow logging instruments are different. Setting the fourth resistor R4 and the fifth resistor R5 as variable resistors can improve the test efficiency without disassembling the resistors when testing different oxygen activated water flow logging instruments.

[0047] Thus, the oxygen-activated water flow logging instrument test system provided in the embodiments of the present application can simulate the neutron generator in the oxygen-activated water flow logging instrument using a neutron generator simulation circuit. During the test process, the neutron generator is replaced by the neutron generator simulation circuit, and the target voltage, anode current, and filament current are accurately obtained, thereby enabling testing of the oxygen-activated water flow logging instrument. The test process does not require neutron excitation, reducing radiation hazards to test personnel. The system is simple and easy to operate, highly efficient, and can reduce the consumption of actual neutron generators, saving resources.

[0048] Figure 3 A circuit diagram of another neutron generator simulation circuit provided in an embodiment of the present application is shown.

[0049] Specifically, the preprocessing circuit 132 in the neutron generator simulation circuit 13 includes a rectifier circuit and a filter circuit. The rectifier circuit input is connected to the transformer output, and the rectifier circuit output is connected to the filter circuit input. Specifically, the filter circuit output serves as the output of the preprocessing circuit 132, while the rectifier circuit input serves as the input of the preprocessing circuit 132. The rectifier circuit is used to convert the input AC power into DC power and / or perform voltage reduction processing. The filter circuit is used to filter out impurity frequencies and improve the stability of the output signal.

[0050] refer to Figure 3 The rectifier circuit includes: a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. The first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 form a rectifier bridge. The cathode of the first diode D1 and the anode of the second diode D2 are connected to the first output terminal of the transformer T1, the anode of the third diode D3 and the cathode of the fourth diode D4 are connected to the second output terminal of the transformer T2; the cathode of the second diode D2 and the cathode of the third diode D3 are connected to the first end of the first resistor R1; the anode of the first diode D1 and the anode of the fourth diode D4 are connected to the second end of the third resistor R3, and the first end of the first capacitor C1, the first end of the first resistor R1, the cathode of the second diode D2, and the cathode of the third diode D3 are grounded.

[0051] The filter circuit specifically includes a first capacitor C1 , wherein a first end of the first capacitor C1 is connected to a first end of the first resistor R1 , and a second end of the first capacitor C1 is connected to a second end of the third resistor R3 .

[0052] In an optional embodiment, the neutron generator simulation circuit 13 further includes a connector P1, and the interface J1 is connected to the front-end device group 12 via the connector P1. The connector P1 is specifically connected to the interface J1 in a detachable manner. Specifically, the connector P1 can be a 15-pin connector, etc.

[0053] In an optional implementation, a first fuse F1 is connected to the input end of the transformer T1 , and / or a second fuse F2 is connected to the first end of the fourth resistor R4 .

[0054] Specific reference Figure 3 , connector P1 is connected to interface J1, pins 1, 2, and 3 of interface J1 are connected to the input end of transformer T1, and a first fuse F1 is connected between pin 1 and the first input end of transformer T1; pin 4 of interface J1 is the filament voltage output end, pin 5 of interface J1 is the target voltage detection signal input end, pins 6 and 7 of interface J1 are grounded, and pin 8 of interface J1 is the anode voltage output end.

[0055] In an optional embodiment, the neutron generator simulation circuit may be disposed in a preset protective box to improve the safety of the neutron generator simulation circuit and extend its service life.

[0056] It can be seen that the neutron generator simulation circuit provided in the embodiment of the present application further includes a rectifier circuit, a filter circuit and a fuse, so as to ensure the signal quality in the neutron generator simulation circuit, ensure the circuit stability, and improve the test accuracy and stability.

[0057] It should be noted that, in the present invention, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not represent any actual relationship or order between the entities or operations.

[0058] The illustrations provided in the present invention are merely schematic illustrations of the basic concept of the present invention. The illustrations only show components relevant to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0059] The term "connection" as used in the present invention includes both direct connection and indirect connection, such as connection through active devices, passive devices or electrically conductive media; it may also include connection through other active devices or passive devices known to those skilled in the art on the basis of achieving the same or similar functional purposes, such as connection through circuits or components such as switches and follower circuits.

[0060] The description and application of the present invention here are illustrative and are not intended to limit the scope of the present invention to the above-mentioned embodiments. The effects or advantages involved in the embodiments may not be reflected in the embodiments due to interference from various factors, and the description of the effects or advantages is not used to limit the embodiments. Variations and changes to the embodiments disclosed here are possible, and replacements and various equivalent components of the embodiments are well known to those of ordinary skill in the art. It should be clear to those skilled in the art that, without departing from the spirit or essential characteristics of the present invention, the present invention can be implemented in other forms, structures, arrangements, proportions, and with other components, materials and parts. Other variations and changes can be made to the embodiments disclosed here without departing from the scope and spirit of the present invention.

Claims

1. A test system for an oxygen-activated water flow logging instrument, comprising surface equipment and a front-end equipment group, characterized in that: The test system further includes: a neutron generator simulation circuit; The neutron generator simulation circuit includes: an interface, a transformer, a preprocessing circuit, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor; Among them, the interface is connected to the front-end equipment group, the target voltage control signal output end of the interface is connected to the transformer input end, and the transformer output end is connected to the preprocessing circuit input end; the first output end of the preprocessing circuit is connected to the first end of the first resistor, and the second output end of the preprocessing circuit is connected to the second end of the third resistor; the second end of the first resistor is connected to the first end of the second resistor and the target voltage detection signal input end of the interface, and the second end of the second resistor is connected to the first end of the third resistor; the first end of the fourth resistor is connected to the anode voltage output end of the interface, and the second end of the fourth resistor is grounded; the first end of the fifth resistor is connected to the filament voltage output end of the interface, and the second end of the fifth resistor is grounded; The transformer is used to adjust the transformer output voltage according to the target voltage control signal, and the preprocessing circuit is used to preprocess the transformer output voltage signal; The fourth resistor is consistent with the ion source resistance of the neutron generator of the oxygen-activated water flow logging instrument, and the fifth resistor is consistent with the filament resistance of the neutron generator of the oxygen-activated water flow logging instrument; The anode voltage output end of the interface is used to transmit the anode voltage signal to the ground equipment through the front-end equipment group, so that the ground equipment can display the anode current according to the anode voltage signal; the filament voltage output end of the interface is used to transmit the filament voltage signal to the ground equipment through the front-end equipment group, so that the ground equipment can display the filament current according to the filament voltage signal; the target pressure detection signal input end of the interface is used to transmit the target pressure detection signal to the ground equipment through the front-end equipment group, so that the ground equipment can display the target pressure according to the target pressure detection signal.

2. The test system according to claim 1, wherein: The pre-processing circuit includes: a rectifier circuit and a filter circuit; The input end of the rectifier circuit is connected to the output end of the transformer, and the output end of the rectifier circuit is connected to the input end of the filter circuit.

3. The test system according to claim 2, wherein: The rectifier circuit includes: a first diode, a second diode, a third diode, and a fourth diode; The cathode of the first diode and the anode of the second diode are connected to the first output terminal of the transformer, and the anode of the third diode and the cathode of the fourth diode are connected to the second output terminal of the transformer. The cathode of the second diode and the cathode of the third diode are connected to the first end of the first resistor; the anode of the first diode and the anode of the fourth diode are connected to the second end of the third resistor.

4. The test system according to claim 2, wherein: The filtering circuit includes: a first capacitor; The first end of the first capacitor is connected to the first end of the first resistor, and the second end of the first capacitor is connected to the second end of the third resistor.

5. The test system according to any one of claims 1 to 4, characterized in that: The second resistor is a variable resistor.

6. The test system according to claim 5, characterized in that: The fourth resistor and / or the fifth resistor are variable resistors.

7. The test system according to any one of claims 1 to 4, characterized in that: The interface is connected to the front-end device group through a connector.

8. The test system according to claim 7, characterized in that: The connector is detachably connected to the interface.

9. The test system according to any one of claims 1 to 4, characterized in that: A first fuse is connected to the input end of the transformer; And / or, the first end of the fourth resistor is connected to a second fuse.

10. The test system according to any one of claims 1 to 4, characterized in that: The neutron generator simulation circuit is arranged in a preset protection box.

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