CN116699698A - Optical fiber permanent monitoring equipment and method for gas storage well - Google Patents
Optical fiber permanent monitoring equipment and method for gas storage well Download PDFInfo
- Publication number
- CN116699698A CN116699698A CN202310980267.0A CN202310980267A CN116699698A CN 116699698 A CN116699698 A CN 116699698A CN 202310980267 A CN202310980267 A CN 202310980267A CN 116699698 A CN116699698 A CN 116699698A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- gas storage
- well
- monitoring
- core tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 87
- 238000012544 monitoring process Methods 0.000 title claims abstract description 58
- 238000003860 storage Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 81
- 238000012423 maintenance Methods 0.000 claims abstract description 9
- 238000012806 monitoring device Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 91
- 230000007246 mechanism Effects 0.000 claims description 19
- 230000008033 biological extinction Effects 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 55
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 239000003345 natural gas Substances 0.000 description 8
- 210000005239 tubule Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
- E21B47/135—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency using light waves, e.g. infrared or ultraviolet waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/288—Event detection in seismic signals, e.g. microseismics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/52—Structural details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/52—Structural details
- G01V2001/526—Mounting of transducers
Abstract
An optical fiber permanent monitoring device and method for a gas storage well relate to the technical field of gas storage well monitoring. The monitoring wells are distributed above the cover layer of the gas storage well and around the stratum of the gas storage well, a core tube is arranged in the sleeve, two through holes are formed in the core tube, optical cables are arranged in each through hole, optical fiber sensors are connected in series on the optical cables, and the two optical fiber sensors positioned on two sides of the core tube are staggered in height. The beneficial effects of the invention are as follows: the monitoring wells are distributed above the cover layer of the gas storage well and around the gas storage stratum, the pressure change of the recorded underground microseism event and the space distribution rule of the change along with time are monitored in real time, major potential safety hazards or accidents are avoided, two independent optical cables and optical fiber sensors are arranged in one monitoring well, when one optical cable or optical fiber sensor breaks down, the other optical cable can be lifted for maintenance and replacement, and the other optical cable works normally, so that uninterrupted permanent monitoring of the gas storage well is maintained.
Description
Technical Field
The invention relates to the technical field of gas storage well monitoring, in particular to a device and a method for permanently monitoring a gas storage well through optical fibers.
Background
Underground reservoirs are geologic structures and supporting facilities for storing natural gas. The main functions are peak regulation and safe gas supply, investment saving by improving pipeline utilization coefficient, gas transmission cost reduction and the like, wherein the exhausted gas storage is an underground gas storage built in an exhausted gas field. Most build in depleted gas reservoirs and a few build in depleted reservoirs containing associated gas. The gas production degree of the depleted gas reservoir reaches 70% most suitably; when the water content of the exhausted oil reservoir reaches 90%, the reservoir has the characteristics of both the water-bearing layer and the oil reservoir, and is most suitable for serving as an air reservoir, and a small amount of oil gas remains in the air reservoir, so that the operation is simpler; the original partial gas (oil) well, process equipment and the like can be utilized after being checked and maintained, only partial facilities are needed to be newly built, and the investment is small;
in the long-term high-pressure gas injection and gas production circulation peak regulation operation of the gas storage well, when high-pressure natural gas is injected into the underground through the gas injection well, the underground faults can be induced to be activated, the sealing cover layer and the surrounding stratum of the gas storage well are induced to be activated by the high-pressure natural gas, the activated faults can damage the integrity of the sealing of the gas storage well, so that the underground high-pressure natural gas leaks to the ground along the activated faults, and serious potential safety hazards or accidents are caused;
at present, monitoring of stratum of a gas storage well through optical fiber sensors has been reported, the optical fiber sensors are distributed around the gas storage well and a cover layer is used for monitoring of microseism conditions of the stratum, however, at present, all the used technologies are that an optical cable and the optical fiber sensors are fixed underground, once the optical cable and the optical fiber sensors fail, maintenance is needed, the stratum cannot be monitored during maintenance, and maintenance cost is high.
Disclosure of Invention
The invention provides optical fiber permanent monitoring equipment and method for an air storage well, which aim to solve the problem that the existing air storage well cannot realize all-weather permanent monitoring and has potential safety hazards.
The technical scheme provided by the invention is as follows: the utility model provides a permanent monitoring facilities of gas storage well optic fibre, including annotating and producing well and monitoring well, the monitoring well distributes above the overburden of gas storage well and the stratum around the gas storage well, the monitoring well comprises well head and pit shaft, the pit shaft includes the sleeve pipe, install the core pipe in the sleeve pipe, open in the core pipe has two parallel through holes, two through holes link up the whole length of core pipe, every through downthehole optical cable that is equipped with, connect in series with the optical fiber sensor on the optical cable, a plurality of optical fiber sensors link together through equidistant in proper order of optical cable, wherein two optical fiber sensors that lie in the core pipe both sides stagger each other in the height, open the hole in optical fiber sensor position through hole, the hole communicates with the core pipe outside, the core pipe all is equipped with sealing washer and sleeve pipe sealing connection between two optical fiber sensors that stagger each other;
the sleeve is connected with the wellhead above the ground, the wellhead comprises a tee joint and an outlet sealing mechanism, the sleeve is connected with an inlet of the tee joint through a flange in a sealing way, two outlets of the tee joint are respectively connected with a ball valve and the outlet sealing mechanism, and two optical cables in the core tube extend out of the two outlet sealing mechanisms respectively;
the outlet sealing mechanism comprises a sealing cylinder, the sealing cylinder is in sealing connection with the ball valve through a flange, and one side of an outlet of the sealing cylinder is in sliding sealing connection with the optical cable through a combined sealing ring;
the system also comprises a composite modem instrument, and the optical cables of all the monitoring wells are connected to the composite modem instrument.
The optical cable comprises two multimode optical fibers, the two multimode optical fibers are placed in a continuous stainless steel tubule, the two multimode optical fibers are connected with an optical fiber sensor in series, high-temperature resistant optical fiber paste is filled in the continuous stainless steel tubule, and the tail part of the continuous stainless steel tubule is connected with a extinction column.
The top of the core tube is provided with a circle of flange, the flange of the core tube is clamped between the sleeve and two method sheets connected with the tee joint, the two through holes are all provided with conical holes with the diameter being enlarged at the top of the core tube, and the middle part of the tee joint is provided with a guide plate.
The outer circle of the extinction column is inlaid with a permanent magnet ring, the inside of the sealing cylinder is provided with a magnetic switch, and the position of the magnetic switch is as follows: when the optical fiber is drawn out or inserted into the sealing cylinder, the extinction column reaches the installation position of the magnetic switch, and the magnetic attraction of the permanent magnet ring enables the magnetic switch to act.
The sealing cylinder is provided with a lip-shaped sealing ring at the position where the optical cable passes through, the sealing lip of the lip-shaped sealing ring faces to the inner side, and a framework is arranged on the outer side of the lip-shaped sealing ring.
The permanent monitoring method for the optical fiber of the gas storage well comprises the following steps:
a. running the casing into the well in the newly drilled monitoring well;
b. pumping cement slurry into the bottom of the monitoring well by using a high-pressure pump truck, so that the cement slurry returns to the ground from the bottom along an annular area between the outer wall of the casing and the drilled hole;
c. after the cement is solidified, placing the cement into an oil pipe for well flushing;
d. the method comprises the steps of (1) putting a core tube into the core tube, arranging an incident hole tool in a side hole of the core tube, and opening a monitoring channel of a sleeve by perforating the perforation tool;
e. the optical cable and the optical fiber sensor are put into the through hole of the core tube, so that the positions of the optical fiber sensor and the side hole are corresponding;
f. installing a wellhead, clamping a flange of a core tube between two flanges connected with a tee joint and a sleeve, fixing the core tube, and connecting each multimode fiber to a composite modem instrument;
g. continuously monitoring pressure signals of the optical fiber sensors through a composite modulation-demodulation instrument during normal production operation of the gas storage injection-production well, namely gas injection or gas production;
h. when a certain optical cable or an optical fiber sensor breaks down, the optical cable is lifted by using a winch, when the lifted extinction column passes over the ball valve and reaches the magnetic attraction switch position, the magnetic force of the permanent magnet ring on the extinction column attracts the magnetic attraction switch, the magnetic attraction switch acts, the ball valve is closed at the moment, the optical cable is pulled out of the outlet sealing mechanism for maintenance or replacement, and at the moment, the other optical cable in the sleeve works normally, so that uninterrupted permanent monitoring of the gas storage well is maintained;
i. after a new or maintained optical cable is inserted from the outlet sealing mechanism, the combined sealing ring in the sealing cylinder forms a seal with the optical cable, the ball valve in the direction is opened, and the optical cable is continuously arranged in the core tube through the winch.
The beneficial effects of the invention are as follows: by distributing the monitoring wells above the cover layer of the gas storage well and around the gas storage layer, monitoring the recorded pressure change of the underground microseism event and the space distribution rule changing along with time in real time, judging whether the underground fault is activated or not in real time in the normal gas injection and gas production operation of the gas storage in an on-line manner, whether the small fault activated by the high-pressure natural gas is induced on the sealing cover layer of the gas storage, whether the activated small fault can damage the integrity of the sealing cover layer of the gas storage, and whether the leakage of the underground high-pressure natural gas to the ground along the activated small fault on the sealing cover layer can occur or not, thereby avoiding major potential safety hazards or accidents;
the two optical fiber sensors positioned at the two sides of the core tube are staggered in height, and the core tube is provided with sealing rings between the two optical fiber sensors staggered in each other and is in sealing connection with the sleeve, so that the optical fiber sensors of the two optical cables form sealing with each other, and after one optical cable is lifted out, the sealing and the monitoring environment of the other optical cable and the optical fiber sensors are not damaged;
two independent optical cables and optical fiber sensors which can be replaced independently are arranged in one monitoring well, so that when one optical cable or optical fiber sensor fails, maintenance and replacement can be carried out, the other optical cable works normally, the stratum activity condition of the gas storage well is kept to be monitored permanently, and the problem that the optical cable and the optical fiber sensor cannot be replaced when being fixed in a shaft at present is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic illustration of the construction of a wellbore in accordance with the present invention;
FIG. 3 is a section A-A of FIG. 2;
FIG. 4 is a schematic view of the wellhead configuration of the present invention;
FIG. 5 is an enlarged view at B of FIG. 4;
fig. 6 is a schematic view of a connection of a fiber optic cable to a fiber optic column in accordance with the present invention.
In the figure: 1-monitoring well, 2-well shaft, 3-composite modem instrument, 4-injection well, 5-sleeve, 6-core tube, 7-optical cable, 8-optical fiber sensor, 9-side hole, 10-monitoring channel, 11-tee joint, 12-ball valve, 13-outlet sealing mechanism, 14-guide plate, 15-flange, 16-conical hole, 17-sealing cylinder, 18-combined sealing ring, 19-magnetic switch, 20-extinction column, 21-lip sealing ring, 22-skeleton, 23-continuous stainless steel thin tube, 24-multimode optical fiber, 25-permanent magnet ring, 26-well head, 27-through hole.
Detailed Description
As shown in fig. 1-6, an optical fiber permanent monitoring device for a gas storage well comprises an injection and production well 4 and a monitoring well 1, wherein the monitoring well 1 is distributed above a cover layer of the gas storage well and a stratum around the gas storage well, the monitoring well 1 is composed of a wellhead 26 and a shaft 2, the shaft 2 comprises a sleeve 5, a core pipe 6 is arranged in the sleeve 5, two parallel through holes 27 are formed in the core pipe 6, the two through holes 27 penetrate through the whole length of the core pipe 6, an optical cable 7 is arranged in each through hole 27, an optical fiber sensor 8 is connected in series on the optical cable 7, a plurality of optical fiber sensors 8 are connected in series at equal intervals through the optical cable 7 in sequence, two optical fiber sensors 8 positioned at two sides of the core pipe 6 are staggered in height, side holes 9 are formed in positions of the optical fiber sensors 8 through the holes 27, the side holes 9 are communicated with the outside of the core pipe 6, a sealing ring is arranged between the two optical fiber sensors 8 which are staggered mutually, and the sleeve 5, therefore, the two optical fiber sensors 7 and the optical fiber sensors 8 form sealing mutually, after one optical cable 7 is lifted out, the optical cable 7 and the optical fiber sensors 8 are not destroyed, and the optical fiber sensors 8 are respectively sealed in the sealing tool and the side layers of the optical fiber sensors 8 are arranged in the position after the optical fiber sensor is penetrated by the side of the sealing tool, and the side of the optical fiber sensor 8 is well, and the stratum is well;
the sleeve 5 is connected with the wellhead 26 above the ground, the wellhead 26 comprises a tee joint 11 and an outlet sealing mechanism 13, the sleeve 5 is connected with an inlet of the tee joint 11 through a flange in a sealing way, two outlets of the tee joint 11 are respectively connected with a ball valve 12 and the outlet sealing mechanism 13, and two optical cables 7 in the core tube 6 respectively extend out of the two outlet sealing mechanisms 13;
also included is a composite modem instrument 3, and an optical cable 7 for each monitoring well 1 is connected to the composite modem instrument 3.
The optical cable 7 comprises two multimode optical fibers 24, the two multimode optical fibers 24 are placed in a continuous stainless steel thin tube 23, the two multimode optical fibers 24 are connected with the optical fiber sensor 8 in series, high-temperature resistant optical fiber paste is filled in the continuous stainless steel thin tube 23, the tail part of the continuous stainless steel thin tube 23 is connected with a extinction column 20, and laser incident from the top end of the multimode optical fiber 24 is prevented from being reflected back to the top end of the optical fiber from the tail end.
The outlet sealing mechanism 13 comprises a sealing cylinder 17, the sealing cylinder 17 is connected with a ball valve 12 through a flange seal, one side of the outlet of the sealing cylinder 17 is connected with the optical cable 7 through a combined sealing ring 18 in a sliding sealing manner, the inside and the outside of a wellhead 26 are not communicated, when one optical cable 7 breaks down, the optical cable 7 is lifted up, when the tail part of the optical cable 7 passes over the ball valve 12, the optical cable 7 is pulled out after the ball valve 12 is closed, the pressure in a well cannot be released, and the optical fiber sensor 8 of the other optical cable 7 is not influenced to detect formation pressure change.
The top of the core tube 6 is provided with a circle of flange 15, the flange 15 of the core tube 6 is clamped between the sleeve 5 and two flanges connected with the tee joint 11, the top of the core tube 6 is provided with two through holes 27 with conical holes 16 with larger diameters, the middle part of the tee joint 11 is provided with a guide plate 14, and the conical holes 16 and the guide plate 14 play a guiding role when the optical cable 7 is inserted into the through holes 27.
The outer circle of the extinction column 20 is embedded with a permanent magnet ring 25, the inside of the sealing cylinder 17 is provided with a magnetic switch 19, and the position of the magnetic switch 19 is as follows: when the optical cable 7 is drawn out or inserted into the sealing cylinder 17, and the extinction column 20 reaches the installation position of the magnetic switch 19, the magnetic attraction force of the permanent magnet ring 25 enables the magnetic switch 19 to act, after the magnetic switch 19 acts, the optical cable 7 is suspended from being drawn out, and after the ball valve 12 where the optical cable 7 is positioned is closed, the optical cable 7 is drawn out.
The sealing cylinder 17 is provided with a lip-shaped sealing ring 21 at a position where the optical cable 7 passes through, the sealing lip of the lip-shaped sealing ring 21 faces to the inner side, a framework 22 is arranged on the outer side of the lip-shaped sealing ring 21, and the sealing lip of the lip-shaped sealing ring 21 only presses against the optical cable 7 under the action of the framework 22 when the pressure in a well is larger, so that the sealing performance of a wellhead 26 is further improved.
The permanent monitoring method for the optical fiber of the gas storage well comprises the following steps:
a. in the newly drilled monitoring well 1, a casing 5 is lowered into the well;
b. pumping cement slurry into the bottom of the monitoring well 1 by using a high-pressure pump truck, so that the cement slurry returns to the ground from the bottom along an annular area between the outer wall of the casing 5 and the drilled hole;
c. after the cement is solidified, placing the cement into an oil pipe for well flushing;
d. the core tube 6 is put in, an incident hole tool is arranged in a side hole 9 of the core tube 6, and a perforation tool perforation opens a monitoring channel 10 of the sleeve 5;
e. the optical cable 7 together with the optical fiber sensor 8 is put into the through hole 27 of the core tube 6, so that the positions of the optical fiber sensor 8 and the side hole 9 correspond;
f. installing a wellhead 26, clamping a flange 15 of the core tube 6 between two flanges connected with the tee joint 11 and the sleeve 5, fixing the core tube 6, and connecting each multimode optical fiber 24 to the composite modem instrument 3;
g. continuously monitoring pressure signals of the optical fiber sensors 8 through the composite modulation and demodulation instrument 3 during normal production operation of the injection and production well 4 of the gas storage, namely gas injection or gas production;
h. when a certain optical cable 7 or an optical fiber sensor 8 breaks down, the optical cable 7 is lifted up by a winch, and when the lifting extinction column 20 passes through the ball valve 12 to reach the position of the magnetic attraction switch 19, the magnetic force of the permanent magnet ring 25 on the extinction column 20 attracts the magnetic attraction switch 19, the magnetic attraction switch 19 acts, the ball valve 12 is closed at the moment, the optical cable 7 is pulled out from the outlet sealing mechanism 13 for maintenance or replacement, and at the moment, the other optical cable 7 in the sleeve 5 works normally to keep uninterrupted permanent monitoring of a gas storage well;
i. after a new or repaired optical cable 7 is inserted from the outlet sealing mechanism 13, the combined sealing ring 18 in the sealing cylinder 17 forms a seal with the optical cable 7, the ball valve 12 in the direction is opened, and the optical cable 7 is continuously loaded into the core tube 6 through the winch.
By distributing the monitoring wells 1 above the cover layer of the gas storage well and around the gas storage layer, the pressure change of the recorded underground microseism event and the space distribution rule changing along with time are monitored in real time, whether underground faults are activated or not is judged on line in real time when the gas storage is used for normal gas injection and gas production operation, whether the sealing cover layer of the gas storage is provided with the faults activated by high-pressure natural gas, whether the activated faults damage the integrity of the sealing cover layer of the gas storage or not is judged, and whether leakage of the underground high-pressure natural gas to the ground along the activated faults on the sealing cover layer or not is caused, so that major potential safety hazards or accidents are avoided.
Two independent optical cables 7 and optical fiber sensors 8 are arranged in one monitoring well 1, so that when the monitoring density is increased and one optical cable 7 or one optical fiber sensor 8 fails, maintenance and replacement can be carried out, the other optical cable 7 works normally, uninterrupted permanent monitoring of the gas storage well is kept, and meanwhile, when one of the failed optical cables 7 is pulled out, the pressure environment in the monitoring well 1 is kept unchanged, and the stratum monitoring effect of the gas storage well is not influenced.
Claims (6)
1. The utility model provides a permanent monitoring facilities of gas storage well optic fibre, includes annotates and adopts well (4) and monitoring well (1), its characterized in that: the monitoring well (1) is distributed above a cover layer of the gas storage well and is formed around the gas storage well, the monitoring well (1) is composed of a wellhead (26) and a shaft (2), the shaft (2) comprises a sleeve (5), a core tube (6) is arranged in the sleeve (5), two parallel through holes (27) are formed in the core tube (6), the two through holes (27) penetrate through the whole length of the core tube (6), an optical cable (7) is arranged in each through hole (27), optical fiber sensors (8) are connected in series on the optical cable (7), the optical fiber sensors (8) are connected in series at equal intervals through the optical cable (7) in sequence, the two optical fiber sensors (8) located on two sides of the core tube (6) are staggered in height, a side hole (9) is formed in the position of the optical fiber sensor (8) through the holes (27), the side hole (9) is communicated with the outside of the core tube (6), and a sealing ring is arranged between the two optical fiber sensors (8) which are staggered in each other;
the sleeve (5) is connected with the wellhead (26) above the ground, the wellhead (26) comprises a tee joint (11) and an outlet sealing mechanism (13), the sleeve (5) is connected with an inlet of the tee joint (11) in a sealing manner through a flange, two outlets of the tee joint (11) are respectively connected with a ball valve (12) and the outlet sealing mechanism (13), and two optical cables (7) in the core tube (6) respectively extend out of the two outlet sealing mechanisms (13);
the outlet sealing mechanism (13) comprises a sealing cylinder (17), the sealing cylinder (17) is connected with the ball valve (12) through a flange in a sealing way, and one side of the outlet of the sealing cylinder (17) is connected with the optical cable (7) through a combined sealing ring (18) in a sliding sealing way;
the system also comprises a composite modem instrument (3), and the optical cables (7) of each monitoring well (1) are connected to the composite modem instrument (3).
2. A gas storage well optical fiber permanent monitoring device according to claim 1, wherein: the optical cable (7) comprises two multimode optical fibers (24), the two multimode optical fibers (24) are placed in a continuous stainless steel thin tube (23), the two multimode optical fibers (24) are connected with the optical fiber sensor (8) in series, high-temperature resistant optical fiber paste is filled in the continuous stainless steel thin tube (23), and the tail part of the continuous stainless steel thin tube (23) is connected with the extinction column (20).
3. A gas storage well optical fiber permanent monitoring device according to claim 2, wherein: a circle of flange (15) is arranged at the top of the core tube (6), the flange (15) of the core tube (6) is clamped between the two flanges connected with the sleeve (5) and the tee joint (11), conical holes (16) with the diameter being enlarged are formed in the top of the core tube (6) through holes (27), and a guide plate (14) is arranged in the middle of the tee joint (11).
4. A gas storage well optical fiber permanent monitoring device according to claim 3, wherein: the outer circle of the extinction column (20) is embedded with a permanent magnet ring (25), the inside of the sealing cylinder (17) is provided with a magnetic switch (19), and the position of the magnetic switch (19) is as follows: when the optical cable (7) is drawn out or inserted into the sealing cylinder (17), the extinction column (20) reaches the installation position of the magnetic switch (19), and the magnetic attraction of the permanent magnet ring (25) enables the magnetic switch (19) to act.
5. The optical fiber permanent monitoring device for a gas storage well according to claim 4, wherein: the sealing cylinder (17) is provided with a lip-shaped sealing ring (21) at a position where the optical cable (7) passes through, a sealing lip of the lip-shaped sealing ring (21) faces inwards, and a framework (22) is arranged on the outer side of the lip-shaped sealing ring (21).
6. The method for monitoring the optical fiber permanent monitoring equipment for the gas storage well according to claim 5, wherein the method comprises the following steps: the method comprises the following steps:
a. running a casing (5) into the newly drilled monitoring well (1);
b. pumping cement slurry into the bottom of the monitoring well (1) by using a high-pressure pump truck, so that the cement slurry returns to the ground from the bottom of the well along an annular area between the outer wall of the casing (5) and the drilled hole;
c. after the cement is solidified, placing the cement into an oil pipe for well flushing;
d. the method comprises the steps of (1) putting a core tube (6), arranging an incident hole tool in a side hole (9) of the core tube (6), and opening a monitoring channel (10) of a sleeve (5) by perforation of the perforating tool;
e. the optical cable (7) and the optical fiber sensor (8) are put into the through hole (27) of the core tube (6) so that the positions of the optical fiber sensor (8) and the side hole (9) correspond;
f. installing a wellhead (26), clamping a flange (15) of a core tube (6) between two flanges connected with a tee joint (11) and a sleeve (5), fixing the core tube (6), and connecting each multimode optical fiber (24) to a composite modem instrument (3);
g. continuously monitoring pressure signals of the optical fiber sensor (8) through the composite modem instrument (3) during normal production operation of the injection well (4) of the gas storage, namely gas injection or gas production;
h. when a certain optical cable (7) or an optical fiber sensor (8) fails, the optical cable (7) is lifted by a winch, when a lifting extinction column (20) passes through a ball valve (12) and reaches the position of a magnetic attraction switch (19), the magnetic force of a permanent magnet ring (25) on the extinction column (20) attracts the magnetic attraction switch (19), the magnetic attraction switch (19) acts, at the moment, the ball valve (12) is closed, the optical cable (7) is pulled out from an outlet sealing mechanism (13) for maintenance or replacement, at the moment, the other optical cable (7) in a sleeve (5) works normally, and uninterrupted permanent monitoring of a gas storage well is maintained;
i. after a new or maintained optical cable (7) is inserted from the outlet sealing mechanism (13), a combined sealing ring (18) in the sealing cylinder (17) forms a seal with the optical cable (7), the ball valve (12) in the direction is opened, and the optical cable (7) is continuously arranged in the core tube (6) through the winch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310980267.0A CN116699698B (en) | 2023-08-07 | 2023-08-07 | Optical fiber permanent monitoring equipment and method for gas storage well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310980267.0A CN116699698B (en) | 2023-08-07 | 2023-08-07 | Optical fiber permanent monitoring equipment and method for gas storage well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116699698A true CN116699698A (en) | 2023-09-05 |
| CN116699698B CN116699698B (en) | 2023-10-03 |
Family
ID=87841796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310980267.0A Active CN116699698B (en) | 2023-08-07 | 2023-08-07 | Optical fiber permanent monitoring equipment and method for gas storage well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116699698B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030042019A1 (en) * | 2001-08-29 | 2003-03-06 | Harkins Gary O. | Method and apparatus for determining the temperature of subterranean wells using fiber optic cable |
| US20090283261A1 (en) * | 2008-05-15 | 2009-11-19 | Schlumberger Technology Corporation | Continuous fibers for use in well completion, intervention, and other subterranean applications |
| CA2884968A1 (en) * | 2014-03-24 | 2015-09-24 | Redstream Energy Inc. | System and method for producing oil from oil sands reservoirs with low overburden or permeable caprock and heavy oil reservoirs |
| US20180245971A1 (en) * | 2015-04-07 | 2018-08-30 | Halliburton Energy Services, Inc. | Reducing Noise In A Distributed Acoustic Sensing System Downhole |
| CN110541702A (en) * | 2019-10-14 | 2019-12-06 | 中油奥博(成都)科技有限公司 | underground fluid distribution monitoring system and method based on distributed optical fiber sensing |
| CN111577255A (en) * | 2020-05-21 | 2020-08-25 | 盘锦辽油晨宇集团有限公司 | Natural gas storage temperature pressure and vibration monitoring system |
| CN112593924A (en) * | 2020-12-28 | 2021-04-02 | 中油奥博(成都)科技有限公司 | Underground gas storage safety operation monitoring system and monitoring method |
| CN112727431A (en) * | 2021-01-12 | 2021-04-30 | 西南石油大学 | Multifunctional production well wellhead device for underground coal gasification |
| CN112746837A (en) * | 2021-01-20 | 2021-05-04 | 中油奥博(成都)科技有限公司 | Shale oil reservoir exploration data acquisition system and method based on distributed optical fiber sensing |
| CN213540375U (en) * | 2020-05-21 | 2021-06-25 | 盘锦辽油晨宇集团有限公司 | Natural gas storage temperature pressure and vibration monitoring system |
| CN115079250A (en) * | 2022-01-18 | 2022-09-20 | 中油奥博(成都)科技有限公司 | CO based on optical fiber sensing technology 2 System and method for address selection and safety monitoring of sealed storage location |
-
2023
- 2023-08-07 CN CN202310980267.0A patent/CN116699698B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030042019A1 (en) * | 2001-08-29 | 2003-03-06 | Harkins Gary O. | Method and apparatus for determining the temperature of subterranean wells using fiber optic cable |
| US20090283261A1 (en) * | 2008-05-15 | 2009-11-19 | Schlumberger Technology Corporation | Continuous fibers for use in well completion, intervention, and other subterranean applications |
| CA2884968A1 (en) * | 2014-03-24 | 2015-09-24 | Redstream Energy Inc. | System and method for producing oil from oil sands reservoirs with low overburden or permeable caprock and heavy oil reservoirs |
| US20180245971A1 (en) * | 2015-04-07 | 2018-08-30 | Halliburton Energy Services, Inc. | Reducing Noise In A Distributed Acoustic Sensing System Downhole |
| CN110541702A (en) * | 2019-10-14 | 2019-12-06 | 中油奥博(成都)科技有限公司 | underground fluid distribution monitoring system and method based on distributed optical fiber sensing |
| CN111577255A (en) * | 2020-05-21 | 2020-08-25 | 盘锦辽油晨宇集团有限公司 | Natural gas storage temperature pressure and vibration monitoring system |
| CN213540375U (en) * | 2020-05-21 | 2021-06-25 | 盘锦辽油晨宇集团有限公司 | Natural gas storage temperature pressure and vibration monitoring system |
| CN112593924A (en) * | 2020-12-28 | 2021-04-02 | 中油奥博(成都)科技有限公司 | Underground gas storage safety operation monitoring system and monitoring method |
| CN112727431A (en) * | 2021-01-12 | 2021-04-30 | 西南石油大学 | Multifunctional production well wellhead device for underground coal gasification |
| CN112746837A (en) * | 2021-01-20 | 2021-05-04 | 中油奥博(成都)科技有限公司 | Shale oil reservoir exploration data acquisition system and method based on distributed optical fiber sensing |
| CN115079250A (en) * | 2022-01-18 | 2022-09-20 | 中油奥博(成都)科技有限公司 | CO based on optical fiber sensing technology 2 System and method for address selection and safety monitoring of sealed storage location |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116699698B (en) | 2023-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104011317A (en) | A floating offshore facility and a method for drilling a well | |
| CN204875933U (en) | Deep pressure -bearing artesian well shutoff system | |
| CN101403292A (en) | Gas lift method production fluid section plane test technique of mechanical mining horizontal well | |
| CN103184845A (en) | Vertical subsea tree assembly control | |
| CN111622728B (en) | Horizontal well perforation process for connecting perforation of cable tractor with hydraulic conveying perforation | |
| CN201778731U (en) | Oil pipe hanger for marine underwater horizontal oil production tree | |
| CN116699698B (en) | Optical fiber permanent monitoring equipment and method for gas storage well | |
| CN201747350U (en) | Device for water pressure test of wire-line core drill with 75mm hole diameter under condition without drilling | |
| CN106741687A (en) | It is a kind of to convey riser systems and its installation method from tension type production under water | |
| CN112081535A (en) | Ultra-deep high-sulfur-content gas well completion pipe string and construction method thereof | |
| CN201620887U (en) | Machine-acquiring testing pipe-string for floating drilling rig | |
| CN209569369U (en) | A kind of one-way water stop grouting device for vertical shaft section of jurisdiction | |
| CN113622832A (en) | Offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column and operation method | |
| US3481395A (en) | Flow control means in underwater well system | |
| CN105134124A (en) | First-aid repair technology for crude oil pipeline congelation wax blockage | |
| CN217300525U (en) | Casing wellhead switching device for gas storage reservoir injection and production well liquid level test | |
| CN205990888U (en) | A kind of flange sitting extension wearing bush for drilling well | |
| CN220524992U (en) | Novel gas storage pipe column vibration optical fiber DAS on-line detection device | |
| CN110644971A (en) | Device and method for embedding monitoring sensor in upward deep hole by grouting | |
| CN217602616U (en) | Metal sealing gas storage injection and production wellhead device | |
| CN109538793A (en) | A kind of one-way water stop grouting device for vertical shaft section of jurisdiction | |
| CN216157603U (en) | Offshore thermal recovery external cable electric submersible pump injection-production integrated tubular column | |
| CN210118103U (en) | Flexible composite oil pipe and intelligent oil production pipe assembly formed by same | |
| CN215949383U (en) | Oil pipe with built-in hydraulic channel on pipe wall for controlling underground safety valve | |
| CN218816305U (en) | Recoverable optical fiber logging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |