Photoelectric composite multi-parameter simultaneous test signal test cable

Abstract

The invention discloses a photoelectric composite multi-parameter simultaneous test signal test cable. Comprising a cable body and a piezoresistive electronic pressure sensor which is arranged at the tail end of the cable body and electrically connected with the cable body. The cable body comprises a cable body, an optical assembly for detecting temperature and acoustic vibration; the circuit assembly and the optical assembly are arranged in parallel, the lower end of the circuit assembly is electrically connected with the piezoresistive electronic pressure sensor, and the circuit assembly is used for detecting pressure; the cable outer protection steel pipe covers the optical assembly and the circuit assembly and is used for protecting the optical assembly and the circuit assembly; the optical assembly is composed of a DTS temperature measurement sensor and a DAS sound wave vibration sensor. The device has the beneficial effects that the DTS temperature measuring sensor, the DAS sound wave vibration sensor and the piezoresistive electronic pressure sensor are arranged, and the temperature, pressure and sound wave vibration of the thermal production well can be monitored for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of photoelectric test cables, and in particular to a photoelectric composite multi-parameter simultaneous measurement signal test cable. Background Art

[0002] In the process of thermal recovery of heavy oil, recording the dynamic parameters of thermal recovery wells such as downhole temperature, pressure, and acoustic vibration has become a necessary means of production design. By monitoring real-time test data such as temperature, pressure, and vibration, it is possible to timely understand the dynamics of reservoir development, qualitatively and quantitatively interpret the production of thermal recovery reservoirs, and provide data support for thermal recovery effect evaluation and wellbore process technology optimization, so as to guide the high-quality and high-yield development of heavy oil thermal recovery.

[0003] However, the heavy oil thermal recovery wells in offshore oil fields are deeply buried, and the downhole temperature and pressure during the steam injection stage can reach 370°C and 21MPa. Therefore, the test cable has extremely high requirements for temperature and pressure resistance, especially the temperature, pressure and vibration signal transmission of the test cable is not affected by high temperature, high pressure and downhole corrosion environment. At present, the commonly used downhole test cables include optical signal test cables and electrical signal test cables. Among them, the optical signal test cable adopts the optical fiber test principle, but because the current optical fiber pressure sensor cannot meet the 370°C temperature resistance level of thermal recovery wells, it cannot be used for thermal recovery wells in offshore oil fields. For electrical signal test cables, the storage multi-parameter test principle is mostly adopted, which is generally a well test, and cannot meet the long-term monitoring needs of thermal recovery wells.

[0004] Therefore, an optoelectronic composite multi-parameter simultaneous measurement signal test cable that can not only monitor thermal wells for a long time but also meet the requirements of temperature and pressure resistance becomes the key to solving the problem. Summary of the invention

[0005] The object of the present invention is to provide a photoelectric composite multi-parameter simultaneous measurement signal test cable, which is provided with a DTS temperature sensor, a DAS acoustic vibration sensor and a piezoresistive electronic pressure sensor, and can monitor the temperature, pressure and acoustic vibration of a thermal recovery well for a long time.

[0006] Another object of the present invention is to provide a photoelectric composite multi-parameter simultaneous measurement signal test cable that can meet the requirements of temperature and voltage resistance.

[0007] To achieve the above-mentioned object, the present invention adopts the following technical solution, including: a cable body and a piezoresistive electronic pressure sensor disposed at the end of the cable body and electrically connected to the cable body;

[0008] The cable body comprises:

[0009] Optical components for detecting temperature and acoustic vibrations;

[0010] A circuit assembly is arranged in parallel with the optical assembly, and the lower end of the circuit assembly is electrically connected to the piezoresistive electronic pressure sensor for detecting pressure;

[0011] A cable outer protective steel pipe, which is arranged outside the optical component and the circuit component to protect the optical component and the circuit component;

[0012] Among them, the optical component is composed of a DTS temperature sensor and a DAS acoustic wave vibration sensor; the DTS temperature sensor is composed of a temperature measuring optical fiber and a temperature measuring optical fiber outer protective steel tube arranged on the periphery of the temperature measuring optical fiber; the DAS acoustic wave vibration sensor includes a test optical fiber and a test optical fiber outer protective steel tube arranged on the periphery of the test optical fiber, and a sensitivity-enhancing filler is provided between the test optical fiber and the test optical fiber outer protective steel tube.

[0013] Preferably, the temperature measuring optical fiber is a multi-mode modified polyimide pure silica core optical fiber, and the testing optical fiber is a single-mode modified polyimide pure silica core optical fiber.

[0014] Preferably, the circuit assembly comprises:

[0015] 4 pressure transmission wires and 2 platinum resistance temperature measurement wires, which are arranged in parallel; the ends of the 4 pressure transmission wires extend out of the outer side of the cable outer protective steel pipe and are electrically connected to the piezoresistive electronic pressure sensor;

[0016] The circuit component outer protective steel pipe is arranged on the outer periphery of the four pressure transmission wires and the two platinum resistance temperature measurement wires.

[0017] Preferably, an aluminum bonding point for electrically connecting to the four pressure transmission wires is provided at one end of the piezoresistive electronic pressure sensor.

[0018] Preferably, it also includes:

[0019] A first stainless steel tube, the end of which is plugged into the piezoresistive electronic pressure sensor;

[0020] A second stainless steel tube, the front end of which is plugged into the end of the cable body;

[0021] Wherein, the front end of the first stainless steel tube is plugged into the rear end of the second stainless steel tube.

[0022] The beneficial effects of the present invention are as follows: a DTS temperature sensor, a DAS acoustic vibration sensor and a piezoresistive electronic pressure sensor are provided, which can monitor the temperature, pressure and acoustic vibration of the thermal recovery well for a long time; the temperature measuring optical fiber is a multi-mode modified polyimide pure silicon core optical fiber, and the test optical fiber is a single-mode modified polyimide pure silicon core optical fiber, which has good high temperature resistance. The piezoresistive electronic pressure sensor is connected to the four pressure transmission wires through aluminum bonding joints, and a first stainless steel tube and a second stainless steel tube are provided on the outside to meet the requirements of high temperature and high pressure resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic diagram of a photoelectric composite multi-parameter simultaneous measurement signal test cable.

[0024] Figure 2 It is a cross-sectional view of the cable body in the present invention. DETAILED DESCRIPTION

[0025] The invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according to the description.

[0026] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or other elements or combinations thereof.

[0027] like Figure 1-2 As shown, a photoelectric composite multi-parameter simultaneous signal test cable 1 of the present invention comprises: a cable body 100 and a piezoresistive electronic pressure sensor 200 arranged at the end of the cable body 100 and electrically connected to the cable body; the cable body 100 comprises: an optical component 110, which is used to detect temperature and acoustic vibration; a circuit component 120, which is arranged in parallel with the optical component 110, and the lower end of the circuit component 120 is electrically connected to the piezoresistive electronic pressure sensor 200 for detecting pressure; a cable outer protective steel pipe 130, which is arranged outside the optical component 110 and the circuit component 120 to protect the optical component 110 and the circuit component 120. The optical component 110 and the circuit component 120 are as follows; wherein the optical component 110 is composed of a DTS temperature sensor 111 and a DAS acoustic vibration sensor 112; the DTS temperature sensor 111 is composed of a temperature measuring optical fiber 111a and a temperature measuring optical fiber outer protection steel tube 111b arranged on the periphery of the temperature measuring optical fiber 111a; the DAS acoustic vibration sensor 112 includes a test optical fiber 112a and a test optical fiber outer protection steel tube 112c arranged on the periphery of the test optical fiber 112a, and a sensitizing filler 112b is provided between the test optical fiber 112a and the test optical fiber outer protection steel tube 112c.

[0028] During use, the photoelectric composite multi-parameter simultaneous signal test cable 1 is wound on the cable drum, and one end connected with the piezoresistive electronic pressure sensor 200 is placed on the outer end of the drum. The test cable 1 can be lowered to the designed depth of the thermal recovery wellbore by three methods: bundling outside the tube, inside the tube, and turning from outside the tube to inside the tube. The piezoresistive electronic pressure sensor 200 is located at the designed depth position, which can monitor the pressure change at this point. The DTS temperature sensor 111 and the DAS acoustic vibration sensor 112 are placed in the entire wellbore, which can realize real-time monitoring of the temperature and acoustic vibration profile of the entire well section.

[0029] In another embodiment, the temperature measuring optical fiber 111a is a multi-mode modified polyimide pure silica core optical fiber, and the testing optical fiber 112a is a single-mode modified polyimide pure silica core optical fiber.

[0030] In another embodiment, the circuit assembly 120 includes: 4 pressure transmission wires 121 and 2 platinum resistance temperature measurement wires 122, which are arranged in parallel; the ends of the 4 pressure transmission wires 121 extend out of the cable outer protective steel tube 130 and are electrically connected to the piezoresistive electronic pressure sensor 200; and a circuit assembly outer protective steel tube 123, which is arranged on the periphery of the 4 pressure transmission wires and the 2 platinum resistance temperature measurement wires.

[0031] In another embodiment, an aluminum bonding point 210 for electrically connecting to the four pressure transmission wires is provided at one end of the piezoresistive electronic pressure sensor 200 .

[0032] In another embodiment, it also includes: a first stainless steel tube 310, whose end is plugged into the piezoresistive electronic pressure sensor; a second stainless steel tube 320, whose front end is plugged into the end of the cable body 100; wherein the front end of the first stainless steel tube 310 is plugged into the end of the second stainless steel tube 320.

[0033] In summary, the present invention provides a photoelectric composite multi-parameter simultaneous signal test cable 1, which is provided with a DTS temperature sensor 111, a DAS acoustic vibration sensor 112 and a piezoresistive electronic pressure sensor 200, and can monitor the temperature, pressure and acoustic vibration of thermal wells for a long time; the temperature measuring optical fiber 111a is a multi-mode modified polyimide pure silicon core optical fiber, and the test optical fiber 112a is a single-mode modified polyimide pure silicon core optical fiber, which has good high temperature resistance. The piezoresistive electronic pressure sensor 200 is connected to the four pressure transmission wires 121 through an aluminum bonding point 210, and a first stainless steel tube 310 and a second stainless steel tube 320 are provided on the outside to meet the requirements of high temperature and high pressure resistance.

[0034] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An optoelectronic composite multi-parameter simultaneous measurement signal test cable, characterized in that: include: A cable body and a piezoresistive electronic pressure sensor disposed at an end of the cable body and electrically connected to the cable body; The cable body comprises: Optical components for detecting temperature and acoustic vibrations; A circuit assembly is arranged in parallel with the optical assembly, and the lower end of the circuit assembly is electrically connected to the piezoresistive electronic pressure sensor for detecting pressure; A cable outer protective steel pipe, which is arranged outside the optical component and the circuit component to protect the optical component and the circuit component; Among them, the optical component is composed of a DTS temperature sensor and a DAS acoustic wave vibration sensor; the DTS temperature sensor is composed of a temperature measuring optical fiber and a temperature measuring optical fiber outer protective steel tube arranged on the periphery of the temperature measuring optical fiber; the DAS acoustic wave vibration sensor includes a test optical fiber and a test optical fiber outer protective steel tube arranged on the periphery of the test optical fiber, and a sensitivity-enhancing filler is provided between the test optical fiber and the test optical fiber outer protective steel tube.

2. The photoelectric composite multi-parameter simultaneous measurement signal test cable according to claim 1, characterized in that: The temperature measuring optical fiber is a multi-mode modified polyimide pure silica core optical fiber, and the testing optical fiber is a single-mode modified polyimide pure silica core optical fiber.

3. The optoelectronic composite multi-parameter simultaneous measurement signal test cable according to claim 1 or 2, characterized in that: The circuit assembly comprises: 4 pressure transmission wires and 2 platinum resistance temperature measurement wires, which are arranged in parallel; the ends of the 4 pressure transmission wires extend out of the outer side of the cable outer protective steel pipe and are electrically connected to the piezoresistive electronic pressure sensor; The circuit component outer protective steel pipe is arranged on the outer periphery of the four pressure transmission wires and the two platinum resistance temperature measurement wires.

4. The optoelectronic composite multi-parameter simultaneous measurement signal test cable according to claim 3, characterized in that: An aluminum bonding point for electrically connecting to the four pressure transmission wires is provided at one end of the piezoresistive electronic pressure sensor.

5. The optoelectronic composite multi-parameter simultaneous measurement signal test cable according to claim 1 or 2, characterized in that: Also includes: A first stainless steel tube, the end of which is plugged into the piezoresistive electronic pressure sensor; A second stainless steel tube, the front end of which is plugged into the end of the cable body; Wherein, the front end of the first stainless steel tube is plugged into the rear end of the second stainless steel tube.

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