CN220524992U - Novel gas storage pipe column vibration optical fiber DAS on-line detection device - Google Patents

Abstract

The utility model relates to a novel on-line detection device for a vibration optical fiber DAS of a gas storage pipe column, and belongs to the field of construction of gas storages. The system comprises a host computer for recording and storing, a monitoring system for transmitting signals and receiving feedback signals and a photoelectric composite cable for detecting and transmitting signals, wherein the host computer is connected with the monitoring system by wireless signals, one end of the photoelectric composite cable is connected with the inside of the monitoring system, and the other end of the photoelectric composite cable is used for detecting.

Description

Novel gas storage pipe column vibration optical fiber DAS on-line detection device

Technical Field

The utility model belongs to the field of construction of gas storage, and particularly relates to a novel on-line detection device for a vibration optical fiber DAS of a gas storage pipe column.

Background

The gas storage is a temporary warehouse for storing natural gas, and is an artificial gas reservoir. The long-distance transported Tainiu fuel gas is stored in the gas storage in normal times to meet the requirement of the natural gas using peak seventeen so as to ensure the sufficient supply of civil and industrial gas. The gas storage pipe column is a necessary passage for injection and gas production of the gas storage, and is an important component for ensuring the normal operation of the gas storage. In the injection and production process of the gas storage, the injection and production pipe column generally bears the load effects of gas internal pressure, temperature load, viscous force, bulge force, exciting force and the like. The pressure, temperature and the like in the gas storage pipe column are periodically changed along with the alternate circulation of the gas storage injection and production process, and a large alternate load can be generated on the gas storage pipe column.

In the steam injection process, the temperature of the ground gas is generally lower than the gas reservoir temperature, so that the temperature of the pipe column is reduced, and the pipe column is contracted in the axial direction; the gas moves downwards relative to the pipe column to generate downward viscous force, and meanwhile, the pressure in the pipe column is higher than the annular pressure, so that the pipe column is subjected to radial expansion stress, and finally, when the gas passes through the pipe column reducing position or the joint, the pipe column can generate vibration phenomenon due to the change of a flow passage.

In the gas production process, the stress of the pipe column is different from that in the gas injection process, and the temperature of the pipe column is increased to expand the pipe column in the axial direction; the gas causes the string to produce an upward viscous force, which also causes the string to produce an axial tension when the formation pressure is reduced. Thus, the stress on the string during injection and production is a dynamic periodic and rather than static load, which can cause fatigue failure of the string.

At present, a production test method existing in the market is PLT logging, the PLT logging needs to be carried into a well in the test process, the logging tool needs to be repeatedly lifted in the logging process, and normal production of an oil gas well can be disturbed in the process of pulling the logging tool to move. Therefore, how to avoid interfering with oil and gas production during logging is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The utility model aims to solve the technical problems and provides a novel on-line detection device for the vibration optical fiber DAS of the gas storage pipe column.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model provides a novel gas storage tubular column vibration optic fibre DAS on-line measuring device, includes the host computer that the record was stored, the monitoring system of emission signal and receipt feedback signal and surveys and the photoelectric composite cable of transmission signal, the host computer is wireless signal connection with the monitoring system, the inside of monitoring system is connected to the one end of photoelectric composite cable, and the other end is used for surveying.

Preferably, the photoelectric composite cable comprises a first optical fiber, a second optical fiber, a signal wire and a stainless steel tube sleeve, wherein the first optical fiber, the second optical fiber and the signal wire are all arranged in the stainless steel tube sleeve, a first protective layer is arranged on the outer side of the stainless steel tube sleeve, and a second protective layer is arranged on the outer side of the first protective layer.

Preferably, the monitoring system comprises distributed optical fiber sound wave monitoring equipment and distributed optical fiber temperature monitoring equipment, wherein the distributed optical fiber sound wave monitoring equipment and the distributed optical fiber temperature monitoring equipment are both in wireless connection with the host, the distributed optical fiber sound wave monitoring equipment is connected with the first optical fiber, and the distributed optical fiber temperature monitoring equipment is connected with the second optical fiber.

Preferably, the first optical fiber is a single mode optical fiber.

Preferably, the second optical fiber is a multimode optical fiber.

Preferably, the first protective layer and the second protective layer are both composed of armored steel wires.

After adopting the structure, the utility model has the following advantages:

1. the photoelectric composite cable can be bent, the photoelectric composite cable is armored by special galvanized improved plow steel wires, and has good flexibility, so that the photoelectric composite cable can enter a horizontal section from a deflecting section, and then is lowered to the horizontal section even the bottom of a well. In addition, when the photoelectric composite cable is used for logging, the photoelectric composite cable does not need to move, so that the production of oil gas is not affected.

2. According to the utility model, the measurement of all the well sections through which the photoelectric composite cable passes can be realized through the photoelectric composite cable, so that the well logging process is simplified, and when the photoelectric composite cable is used for well logging, the photoelectric composite cable does not need to be pulled, and the oil gas production can be prevented from being interfered in the well logging process.

3. According to the utility model, the number of the first optical fibers and the second optical fibers is more than or equal to two, wherein one of the first optical fibers can be connected with the acoustic wave monitoring equipment, the rest of the first optical fibers can be used as standby optical fibers, and when the loss of the first optical fibers in use is abnormal, the other first optical fibers can be used for being connected with the acoustic wave monitoring equipment. And in the same way, one of the plurality of second optical fibers can be connected with the temperature monitoring equipment, the rest of the second optical fibers can be used as second optical fibers, and when the loss of the second optical fibers in use is abnormal, the other second optical fibers can be selected to be connected with the temperature monitoring equipment.

4. The number of the signal wires is two, and the signal wires are connected with a CCL magnetic positioning instrument.

The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will become apparent by reference to the drawings and the following detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the operation of a distributed fiber optic acoustic monitoring device of the present utility model;

FIG. 2 is a schematic diagram of the operation of the distributed fiber optic temperature monitoring device of the present utility model;

fig. 3 is a schematic view of the inside of an optical fiber of the present utility model.

As shown in the figure: 1. a host; 2. an optical-electrical composite cable; 3. a first optical fiber; 4. a second optical fiber; 5. stainless steel tube sleeve; 6. a first protective layer; 7. a second protective layer; 8. a distributed optical fiber temperature monitoring device; 9. a signal wire; 10. a distributed optical fiber acoustic monitoring device.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The present utility model is described in further detail below in conjunction with the following text:

with reference to fig. 1 and 2, a novel optical fiber DAS on-line detection device for vibration of a gas storage pipe column comprises a host computer 1 for recording and storing, a monitoring system for transmitting signals and receiving feedback signals, and a photoelectric composite cable 2 for detecting and transmitting signals, wherein the host computer 1 is in wireless signal connection with the monitoring system, one end of the photoelectric composite cable 2 is connected with the inside of the monitoring system, the other end of the photoelectric composite cable 2 is used for detection, the photoelectric composite cable 2 is arranged in a DAS distributed optical fiber acoustic wave vibration monitoring system, before logging, workers need to load the photoelectric composite cable 2 into the DAS distributed optical fiber acoustic wave vibration monitoring system, specifically, when assembling a logging tool, a pump truck, a photoelectric composite cable 2 roller and an oil pipe roller are needed, wherein the photoelectric composite cable 2 is wound on the photoelectric composite cable 2 roller, and the DAS distributed optical fiber sound wave vibration monitoring system is wound on the oil pipe roller, when the logging tool is assembled, the first end of the photoelectric composite cable 2 stretches into the DAS distributed optical fiber sound wave vibration monitoring system, the air sealing device is arranged at the first end, then clean water with preset pressure and preset flow rate is injected into the DAS distributed optical fiber sound wave vibration monitoring system by using the pump truck so as to push the air sealing device to gradually enter the DAS distributed optical fiber sound wave vibration monitoring system, and meanwhile, the air sealing device drives the photoelectric composite cable 2 to move in the DAS distributed optical fiber sound wave vibration monitoring system at a preset speed, so that the first end of the photoelectric composite cable 2 is pushed to the end part of the DAS distributed optical fiber sound wave vibration monitoring system, and the DAS distributed optical fiber sound wave vibration monitoring system is sleeved outside the photoelectric composite cable 2. When logging, photoelectric composite cable 2 goes into the well along with DAS distributed optical fiber sound wave vibration monitoring system, logging instrument can rely on DAS distributed optical fiber sound wave vibration monitoring system self gravity to drop to the objective interval, wherein, because DAS distributed optical fiber sound wave vibration monitoring system can buckle, DAS distributed optical fiber sound wave vibration monitoring system is the tubular product of making with low carbon alloy steel, have fine flexibility, therefore DAS distributed optical fiber sound wave vibration monitoring system can enter into the horizontal segment by the whip section, in addition, DAS distributed optical fiber sound wave vibration monitoring system's length is longer, consequently, can satisfy logging instrument's length demand, because the logging instrument that this application provided can place the horizontal segment under with photoelectric composite cable 2, consequently, can acquire the logging data of horizontal segment through photoelectric composite cable 2, the one end of photoelectric composite cable 2 can be connected with monitoring system, monitoring system can emit the light signal, the light signal propagates in photoelectric composite cable 2, monitoring system can also accept feedback signal, the parameter to be measured in the well is different, monitoring system received feedback signal is different. Wherein the photoelectric composite cable 2 itself can be used as a detection probe, so that the monitoring system can simultaneously acquire data of all well sections covered by the photoelectric composite cable 2 in the well. In the existing PLT logging method, the logging tool comprises a cable and a detection probe, one end of the cable is provided with the detection probe, the detection probe with the cable is directly lowered into a well when logging, the logging tool can only acquire data of an interval where the detection probe is located at one time, the cable is continuously drawn in the logging process, so that the position of the cable is changed, the production of oil gas is influenced, after the logging tool provided in the application is used, the photoelectric composite cable 2 enters the well, a static and passive test mode is adopted, the logging tool is not required to be lifted, the oil gas production is not influenced, and the measured data are more accurate. In addition, because each position of the photoelectric composite cable 2 can be used as a detection probe, the logging tool provided by the embodiment can acquire logging data of the whole well section at the same time, and the position of the detection probe does not need to be changed like a PLT logging technology. In addition, one PLT logging test can only achieve a test at a certain time point, and all temperature data and acoustic data in a continuous period of time can be obtained through the photoelectric composite cable by using the logging tool provided by the embodiment.

As shown in fig. 3, the optical-electrical composite cable 2 includes a first optical fiber 3, a second optical fiber 4, a signal wire 9 and a stainless steel tube sleeve 5, the first optical fiber 3 is a single-mode optical fiber, the second optical fiber 4 is a multimode optical fiber, the first optical fiber 3, the second optical fiber 4 and the signal wire 9 are all disposed in the stainless steel tube sleeve 5, a protective layer one 6 is disposed on the outer side of the stainless steel tube sleeve 5, a protective layer two 7 is disposed on the outer side of the protective layer one 6, both the protective layer one 6 and the protective layer two 7 are composed of armored steel wires, the number of the first optical fiber 3 and the second optical fiber 4 is multiple, when the optical fiber loss in use is abnormal, other optical fibers can be used instead to be connected with the monitoring device, the number of the logging tools is two, the two logging tools are respectively the first logging tool and the second logging tool, the optical fiber in the optical composite cable 2 is a single-mode optical fiber, the multimode optical fiber in the first logging tool is connected with the distributed acoustic wave monitoring device, and the optical fiber in the second logging tool is the optical fiber distributed in the optical fiber monitoring device.

Or, the number of logging tools is one, two optical fibers are arranged in the DAS distributed optical fiber acoustic wave vibration monitoring system 1, the two optical fibers are a single mode optical fiber and a multimode optical fiber respectively, wherein the single mode optical fiber is connected with the distributed optical fiber acoustic wave monitoring device, the multimode optical fiber is connected with the distributed optical fiber temperature monitoring device, wherein the first optical fiber 3 and the second optical fiber 4 arranged in the DAS distributed optical fiber acoustic wave vibration monitoring system can be arranged in the same photoelectric composite cable 2, namely, the DAS distributed optical fiber acoustic wave vibration monitoring system is internally provided with the photoelectric composite cable 2, and the two photoelectric composite cables 2 can also be respectively arranged in the two photoelectric composite cables 2, namely, the DAS distributed optical fiber acoustic wave vibration monitoring system 1 is internally provided with the two photoelectric composite cables 2.

As shown in fig. 1 and fig. 2, the monitoring system includes a distributed optical fiber acoustic wave monitoring device 10 and a distributed optical fiber temperature monitoring device 8, where the distributed optical fiber acoustic wave monitoring device 10 and the distributed optical fiber temperature monitoring device 8 are both connected with the host 1 wirelessly, the distributed optical fiber acoustic wave monitoring device 10 is connected to the first optical fiber 3, which can acquire acoustic wave data of an oil-gas well, the distributed optical fiber acoustic wave monitoring device is connected with a single mode optical fiber, the distributed optical fiber temperature monitoring device 8 is connected to the second optical fiber 4, which can acquire temperature data of the oil-gas well, and the distributed optical fiber temperature monitoring device is connected with a multimode optical fiber, and the first optical fiber 3 and the second optical fiber 4 are disposed in one DAS distributed optical fiber acoustic wave vibration monitoring system, so that when logging is performed, only one DAS distributed optical fiber acoustic wave vibration monitoring system needs to be lowered into the oil-gas well, so that temperature data and acoustic wave data can be acquired simultaneously.

A first optical fiber can be arranged in one DAS distributed optical fiber sound wave vibration monitoring system, a second optical fiber can be arranged in the other DAS distributed optical fiber sound wave vibration monitoring system, the distributed optical fiber sound wave monitoring equipment can be connected with the first optical fiber, the optical fiber type temperature monitoring equipment can be connected with the second optical fiber, and when logging is conducted, the DAS distributed optical fiber sound wave vibration monitoring system provided with the first optical fiber and the DAS distributed optical fiber sound wave vibration monitoring system provided with the second optical fiber can be simultaneously put into a well, so that sound wave data and temperature data can be obtained simultaneously. In addition, the DAS distributed optical fiber sound wave vibration monitoring system provided with the first optical fiber and the DAS distributed optical fiber sound wave vibration monitoring system provided with the second optical fiber can be sequentially put into the well to respectively acquire sound wave data and temperature data.

Specifically, the photoelectric composite cable 2 includes a first end and a second end opposite to each other, wherein the first end extends into the DAS distributed optical fiber acoustic wave vibration monitoring system, and the second end is disposed outside the DAS distributed optical fiber acoustic wave vibration monitoring system 1.

The two ends of the DAS distributed optical fiber sound wave vibration monitoring system are a third end and a fourth end respectively, the photoelectric composite cable 2 stretches into the DAS distributed optical fiber sound wave vibration monitoring system, and the first end of the photoelectric composite cable 2 can be fixedly connected with the third end of the DAS distributed optical fiber sound wave vibration monitoring system, so that the photoelectric composite cable 2 is prevented from moving in the DAS distributed optical fiber sound wave vibration monitoring system. The second end of the photoelectric composite cable 2 is exposed to the outside of the DAS distributed optical fiber acoustic wave vibration monitoring system, and the second end can be connected with a temperature monitoring device and an acoustic wave monitoring device. In addition, the photoelectric composite cable 2 comprises a first optical fiber 3 and a second optical fiber 4, wherein one end of the first optical fiber 3 exposed outside the DAS distributed optical fiber acoustic wave vibration monitoring system is a first end, one end of the second optical fiber 4 exposed outside the DAS distributed optical fiber acoustic wave vibration monitoring system is a second end, the first end and the second end are respectively connected with acoustic wave monitoring equipment and temperature monitoring equipment through connecting tail fibers, the connecting tail fibers comprise a first tail fiber and a second tail fiber, the first ends of the plurality of first optical fibers 3 are connected with the plurality of first tail fibers in a one-to-one mode, one end of the first tail fiber, which is far away from the first optical fiber 3, is provided with a first connector, the first connector can be connected with the acoustic wave monitoring equipment in a plug-in mode, the second ends of the plurality of second optical fibers 4 are connected with the plurality of second tail fibers in a one-to-one mode, one end of the second tail fibers, which is far away from the second optical fiber 4, and the second connector can be connected with the temperature monitoring equipment in a plug-in a plug mode. Wherein, a plurality of first pigtails keep away from the one end of first optic fibre and are provided with different marks respectively, and the mark can be numerals 1, 2, 3 … … etc. the staff can be according to the mark and confirm which optic fibre is using optic fibre to and which optical fibre is reserve optic fibre, and the same reason, a plurality of second pigtails keep away from the one end of second optic fibre can be provided with different marks.

Specifically, a third end of the DAS distributed optical fiber acoustic wave vibration monitoring system is provided with a three-way connector, two opposite ends of the three-way connector are respectively provided with a first opening and a second opening, the side surface of the three-way connector is provided with a third opening, the three-way connector is installed in the DAS distributed optical fiber acoustic wave vibration monitoring system through the first opening, and the second end of the photoelectric composite cable 2 penetrates out of the third opening.

The third end of the DAS distributed optical fiber sound wave vibration monitoring system is located outside the well, a tee connector is arranged at the third end, a first opening and a second opening of the tee connector are arranged on the same straight line with an opening of the third end of the DAS distributed optical fiber sound wave vibration monitoring system, the third opening is arranged on the side face of the tee connector, the first opening is used for being connected with the third end of the DAS distributed optical fiber sound wave vibration monitoring system, the second opening can be used for installing other manifolds, the photoelectric composite cable 2 extends out of the third opening, sealing processing is conducted on the third opening, and the tee connector is arranged to enable the photoelectric composite cable 2 to extend out of the side face, so that the photoelectric composite cable 2 is prevented from affecting connection of other manifolds and the DAS distributed optical fiber sound wave vibration monitoring system.

Specifically, a fourth end of the DAS distributed optical fiber acoustic wave vibration monitoring system is fixedly connected with the first end, and a connector and a uniflow valve are arranged at a port of the fourth end.

The port at the fourth end is provided with a single-flow valve, the single-flow valve has a unidirectional conduction function, only liquid in the DAS distributed optical fiber sound wave vibration monitoring system can be allowed to flow into the well, and the single-flow valve can prevent liquid in the well from entering the DAS distributed optical fiber sound wave vibration monitoring system. In the logging process, when the logging tool is difficult to log in, the metal resistance reducing agent can be pumped into the DAS distributed optical fiber acoustic vibration monitoring system, and can flow into the well through the check valve, so that the logging tool logging resistance is reduced. In addition, the connector is a common device in the prior art, and will not be described herein.

Specifically, the method further comprises the following steps: the bypass valve is provided with a fifth end and a sixth end which are opposite, the fifth end is connected with the single-flow valve, and a liquid outlet is formed in the side face of the bypass valve; a storage pressure gauge disposed at the sixth end of the bypass valve; the pressure gauge holds in palm the section of thick bamboo, be formed with accommodation space in the pressure gauge holds in the palm the section of thick bamboo, the storage type pressure gauge set up in the sixth end of bypass valve, the storage type pressure gauge set up in accommodation space is interior.

The fourth end of the DAS distributed optical fiber acoustic wave vibration monitoring system is sequentially provided with a connector, a uniflow valve, a bypass valve and a storage type pressure gauge, wherein the storage type pressure gauge can obtain pressure data and temperature data at the bottom of a well at the same time. When the metal resistance reducing agent is pumped into the DAS distributed optical fiber acoustic vibration monitoring system, the uniflow valve is opened, so that the valve port of the uniflow valve is communicated with the liquid outlet, and the metal resistance reducing agent flows out from the liquid outlet. The fifth end of the single-flow valve is connected with the single-flow valve, the sixth end is one end, far away from the single-flow valve, of the bypass valve, the pressure gauge support cylinder is arranged at the sixth end, an accommodating space is formed in the pressure gauge support cylinder, the storage type pressure gauge can be arranged in the accommodating space, and then the pressure gauge support cylinder can protect the storage type pressure gauge. The storage type pressure gauge can be powered by a battery, so that a lead-in cable in the DAS distributed optical fiber acoustic wave vibration monitoring system is not needed to power the storage type pressure gauge.

The logging method of the utility model comprises the following steps: s1, under a preset production system, simultaneously measuring first sound wave data and first temperature data of all well sections passing by the photoelectric composite cable 2 in a well to be measured in a first preset time period through the photoelectric composite cable 2; under a preset production system, the data acquired by the acoustic wave monitoring equipment and the temperature monitoring equipment are first acoustic wave data and first temperature data respectively, and a shaft leakage point can be obtained by analyzing the first acoustic wave data. According to the logging method provided by the embodiment, the first sound wave data and the first temperature data of all the well sections passing by the photoelectric composite cable 2 in the first preset time period can be obtained through the photoelectric composite cable 2, so that the logging process is simplified. For example, if the logging tool is lowered downhole, the logging system may obtain sonic and temperature data from the wellhead to all locations downhole, where the first time period may be 8 hours to 12 hours. The logging tool, the logging system and the logging method provided by the embodiment can complete testing under the well conditions of different well completion modes such as open hole well completion, casing perforation well completion, screen pipe well completion and the like.

Wherein, before logging, the following steps are needed:

1. equipment placement

Specifically, the DAS distributed optical fiber acoustic wave vibration monitoring system 1 is arranged at the upwind or crosswind position of a wellhead, and the influence of extreme weather such as wind speed, unexpected wind direction change, sand dust, heavy rain and the like is considered. The drum of the DAS distributed optical fiber sound wave vibration monitoring system 1 is 15-20 m away from the wellhead, so that the wellhead is ensured to be positioned on an extension line of a perpendicular bisector of the drum of the DAS distributed optical fiber sound wave vibration monitoring system 1. The distance from the center of the crane turntable to the wellhead should be within the capacity of lifting (75 t). The vehicle can not occupy the emergency channel. The distance between emergency channels between two vehicles should not be less than 1.5m.

2. Installation of equipment

The flange, lubricator, blowout preventer and injector head need to be installed in sequence at the wellhead. Specifically, prior to installation of the blowout preventer, a functional test should be performed. After the test is normal, the flashboard should be in a completely opened state. Before installing the special flange for connecting the blowout preventer with the wellhead, the wellhead should be confirmed to be closed. In the process that the DAS distributed optical fiber acoustic wave vibration monitoring system 1 is led into the injection head, the injection head does not apply clamping pressure under the condition that the DAS distributed optical fiber acoustic wave vibration monitoring system 1 is not clamped by the injection head; the clamping pressure after clamping is increased to 1.4 MPa-2.1 MPa, and the speed is less than 5m/min. After the injection head is installed on the wellhead, the injection head is supported by a support frame or fixed by a guy rope. The number of the guy wires is not less than three, the guy wires are steel wires with the diameter not less than 16mm, the angle between the guy wires and the ground is not less than 45 degrees, and the guy wires and the ground are firmly fixed by using a guide chain or a rope tightener. Wherein, the blowout preventer is provided with a pressure monitoring device. In addition, well control manifolds are installed, and the well control manifolds specifically include: the well killing, throttling and discharging jet Cheng Guanhui and DAS distributed optical fiber acoustic vibration monitoring system 1 is characterized in that a roller high-pressure manifold, pumping equipment is connected to the roller and the roller is connected to a wellhead manifold. The well control manifold should meet the requirements of 5.1.3 in SY/T6690-2008.

3. Pressure test

The pressure test is preferably carried out by using water without granular impurities, solid-free liquid with boiling point higher than 38 degrees or nitrogen. The well mouth, well control device, ground pipeline, DAS distributed optical fiber sound wave vibration monitoring system 1, tool string and the like should be subjected to functional and systematic pressure test according to the construction design requirements. After the blowout preventer and the well control manifold are assembled and disassembled on site each time, pressure test should be carried out again. Specifically, the blowout preventer pressure test meets the requirement of 5.2 in SY/T6690-2008, and the connector pressure test of the single flow valve and DAS distributed optical fiber acoustic wave vibration monitoring system 1: the pressure test value should be 35MPa, the pressure is stabilized for 10min, and the pressure drop is not more than 0.7MPa, which is qualified.

4. Pigging well

And (3) the logging tool is lowered into the well. In the process of descending the well, if the well-dredging operation of the DAS distributed optical fiber acoustic vibration monitoring system 1 cannot reach a target layer or a blocking condition occurs, the well-dredging tool string is replaced, and the replaced well-dredging tool string comprises an outer clamping shoe joint, a double-valve type uniflow valve, a hydraulic release, a jar, a super hydraulic oscillator, a screw motor and a grinding shoe which are connected in sequence. The outer kava joint of the drift well tool string is connected to the connector of the DAS distributed optical fiber acoustic vibration monitoring system 1.

After the DAS distributed optical fiber acoustic vibration monitoring system 1 with the tool string is used for well logging, the logging tool provided by the application can be put into the well. Specifically, the DAS distributed optical fiber acoustic vibration monitoring system 1 logs the logging tool string into the well, the depth counter is deeper before logging, and the tool position is recorded. The speed of the first end of the DAS distributed optical fiber sound wave vibration monitoring system 1 is controlled to be below 5m/min when the first end passes through a blowout preventer and a gas production tree, the speed of the first end of the DAS distributed optical fiber sound wave vibration monitoring system 1 is controlled to be 15-25m/min when the first end passes through 100m and reaches a straight well section, the speed of a deflecting section is controlled to be 10-15m/min, and the speed from a horizontal section to a bottom hole is controlled to be below 10 m/min. And carrying out a lifting test once every 500m of the DAS distributed optical fiber acoustic wave vibration monitoring system, and continuously descending the DAS distributed optical fiber acoustic wave vibration monitoring system 1 at a speed of not more than 10m/min if the DAS distributed optical fiber acoustic wave vibration monitoring system is still not blocked when the DAS distributed optical fiber acoustic wave vibration monitoring system is lowered to the bridge plug position. And lifting 15m for lifting test until the DAS distributed optical fiber acoustic vibration monitoring system 1 detects a blocking surface, and recording the suspended weight data and the actual depth. And judging whether the design depth reaches the design requirement depth or not according to the design depth. If the DAS distributed optical fiber acoustic wave vibration monitoring system 1 with the replaced tool string is put into the well, pumping 1.5 times of well bore volume well flushing liquid to fully flush the well, then taking out the DAS distributed optical fiber acoustic wave vibration monitoring system 1 to a well head, checking a tool, and then putting the logging tool provided by the application into the well.

5. Optical fiber performance test

Before entering the well, the single-mode optical fiber and the multimode light are sequentially connected with acoustic monitoring equipment and temperature monitoring equipment on the ground, and the functions of each optical fiber are tested. The loss of multimode fiber is required to be not more than 0.36db/km at 1310 μm wavelength, while the loss of single mode fiber is required to be not more than 0.2db/km at 1550 μm.

After the above steps, a logging system may be used to log the well.

And S2, under a well closing system, simultaneously measuring second temperature data of all well sections through which the photoelectric composite cable 2 passes in the well to be measured through the photoelectric composite cable 2. And obtaining corresponding output data of each production interval by interpreting the first temperature data, the first sound wave data and the second temperature data. And when the test is carried out under the well closing system, after the temperature monitoring equipment is stable, acquiring second temperature data of the shaft for at least 24 hours.

Specifically, as shown in fig. 2, the preset production schedule has a plurality of preset production schedules; s1, simultaneously measuring first sonic data and first temperature data of all well sections passing by the photoelectric composite cable 2 in a well to be measured in a first preset time period through the photoelectric composite cable 2 specifically comprises:

s1.1, sequentially adjusting the preset production system of the well to be measured, and simultaneously measuring the first sound wave data and the first temperature data of all well sections covered by the photoelectric composite cable 2 in the well to be measured in the first preset time period through the photoelectric composite cable 2 under each preset production system. Specifically, the number of the preset production systems can be three, the three preset production systems comprise a main production system and two auxiliary production systems, wherein different production systems correspond to different yields, the yield can be changed by changing a field choke, so that the change of the production systems is realized, the yield corresponding to the main production system is equal to the optimal yield of a shaft, the yields corresponding to the two auxiliary production systems are different, and the yield corresponding to the auxiliary production systems is smaller than the yield corresponding to the main production system. In the embodiment, logging is performed under a main production system and two auxiliary production systems, so that enough data samples can be obtained. In the process of switching the production system, the temperature continuously drops due to the change, so that the first temperature data and the first sound wave data acquired by the temperature monitoring equipment and the sound wave monitoring equipment are effective data after the temperature is stable.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown throughout. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims (6)

1. The utility model provides a novel gas storage tubular column vibration optic fibre DAS on-line measuring device which characterized in that: the monitoring system comprises a host (1) for recording and storing, a monitoring system for transmitting signals and receiving feedback signals and a photoelectric composite cable (2) for detecting and transmitting signals, wherein the host (1) is connected with the monitoring system through wireless signals, and one end of the photoelectric composite cable (2) is connected with the inside of the monitoring system and the other end of the photoelectric composite cable is used for detecting.

2. The novel gas storage pipe column vibration optical fiber DAS on-line detection device according to claim 1, wherein: the photoelectric composite cable (2) comprises a first optical fiber (3), a second optical fiber (4), a signal conductor (9) and a stainless steel tube sleeve (5), wherein the first optical fiber (3), the second optical fiber (4) and the signal conductor (9) are all arranged in the stainless steel tube sleeve (5), a first protective layer (6) is arranged on the outer side of the stainless steel tube sleeve (5), and a second protective layer (7) is arranged on the outer side of the first protective layer (6).

3. The novel gas storage pipe column vibration optical fiber DAS on-line detection device according to claim 2, wherein: the monitoring system comprises distributed optical fiber sound wave monitoring equipment (10) and distributed optical fiber temperature monitoring equipment (8), wherein the distributed optical fiber sound wave monitoring equipment (10) and the distributed optical fiber temperature monitoring equipment (8) are both in wireless connection with a host (1), the distributed optical fiber sound wave monitoring equipment (10) is connected to a first optical fiber (3), and the distributed optical fiber temperature monitoring equipment (8) is connected to a second optical fiber (4).

4. The novel gas storage pipe column vibration optical fiber DAS on-line detection device according to claim 2, wherein: the first optical fiber (3) is a single mode optical fiber.

5. The novel gas storage pipe column vibration optical fiber DAS on-line detection device according to claim 2, wherein: the second optical fiber (4) is a multimode optical fiber.

6. The novel gas storage pipe column vibration optical fiber DAS on-line detection device according to claim 2, wherein: the first protective layer (6) and the second protective layer (7) are both composed of armored steel wires.