CN111140202A - Deep well and ultra-deep well integrated production completion pipe string and operation method thereof - Google Patents
Deep well and ultra-deep well integrated production completion pipe string and operation method thereof Download PDFInfo
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- CN111140202A CN111140202A CN202010033870.4A CN202010033870A CN111140202A CN 111140202 A CN111140202 A CN 111140202A CN 202010033870 A CN202010033870 A CN 202010033870A CN 111140202 A CN111140202 A CN 111140202A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
- E21B43/1195—Replacement of drilling mud; decrease of undesirable shock waves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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Abstract
The invention provides an integrated production completion pipe string for a deep well and an ultra-deep well and an operation method thereof. The deep well ultra-deep well integrated production completion pipe column comprises: an oil pipe; the downhole safety valve, the chemical agent injection valve, the pitching open type circulating valve, the packer, the instrument seat short section, the perforating pipe, the perforating gun group and the plug are sequentially arranged on the oil pipe from top to bottom; the ground control box comprises a chemical agent injection device, and the chemical agent injection device is connected with a chemical agent injection valve through a liquid guide pipe. The invention solves the problem of poor functionality of the production completion pipe string of the deep well and the ultra-deep well in the prior art.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to an integrated production completion pipe string for a deep well and an ultra-deep well and an operation method thereof.
Background
Deep ultra-deep oil exploitation is the major factor in exploration and development at present and in the future. Along with the increase of the well depth, the well conditions and the working conditions are worse and worse, and the well completion and well workover treatment of a complex well are more difficult. At present, the well completion is mainly completed by adopting a two-trip pipe column structure aiming at a deep well and a high-temperature high-pressure well. Firstly, the perforating pipe column is put in for perforation, and after the perforation is finished, the well completion pipe column structure is put in, and the whole body needs to be pulled out twice. Because the high-density slurry is adopted for killing the well after perforation, a well completion pipe column is put in the high-density slurry, secondary pollution is caused to an oil layer, and meanwhile, the operation cost is high, the cost is high, and the well control risk is large. The well completion pipe column has a single structure, wax or colloid asphaltene in the oil pipe is separated out due to the reduction of pressure and temperature in the production process of a high-temperature and high-pressure oil-gas well, the oil pipe is blocked and cannot be produced, and an electric heating cable is required to be put into the oil pipe to heat and dissolve the wax; the high-temperature high-pressure well usually adopts a permanent packer to produce for a long time, when an upper pipe column above the packer is perforated or damaged due to reasons such as corrosion, a hydraulic cutter needs to be arranged in the oil pipe to cut off the oil pipe above the packer or reversely buckle the oil pipe above the packer, the pipe column above the packer is lifted out, then the packer is drilled and ground, a new well completion pipe column structure is put down again, and the oil pipe above the packer can not be replaced under the condition of well closing pressure below the packer. In addition, in the process of perforating the deep well and the ultra-deep well, the detonation force generated by perforation can cause the packer to fail or be incapable of being unsealed.
From the above, the problem of poor functionality of the production completion string for the deep well and the ultra-deep well exists in the prior art.
Disclosure of Invention
The invention mainly aims to provide an integrated production and well completion string for a deep well and an ultra-deep well and an operation method thereof, and aims to solve the problem that the production and well completion string for the deep well and the ultra-deep well in the prior art is poor in functionality.
In order to achieve the above object, according to an aspect of the present invention, there is provided a deep well and ultra-deep well integrated production completion string, comprising: an oil pipe; the downhole safety valve, the chemical agent injection valve, the pitching open type circulating valve, the packer, the instrument seat short section, the perforating pipe, the perforating gun group and the plug are sequentially arranged on the oil pipe from top to bottom; the ground control box comprises a chemical agent injection device, and the chemical agent injection device is connected with a chemical agent injection valve through a liquid guide pipe.
Furthermore, the ground control box also comprises a timing unit which is connected with the chemical agent injection device, so that the ground control box controls the starting time interval and the single injection duration of the chemical agent injection device, and the starting time interval is equal to the precipitation period of the prefabricated wax and colloid asphaltene.
Furthermore, deep well ultra-deep well integration commissioning completion string still includes upper and lower flexible nipple joint and the bumper shock absorber group of setting on oil pipe, and upper and lower flexible nipple joint is located the top of bumper shock absorber group, and upper and lower flexible nipple joint and bumper shock absorber group are located the below of instrument seat nipple joint and the top of perforating pipe, and upper and lower flexible nipple joint and bumper shock absorber group are used for offsetting the detonation force when perforating the detonation.
Furthermore, the deep well ultra-deep well integrated production completion string further comprises an optical cable sensor, the optical cable sensor is connected with the ground control box through an optical cable, and when the pressure gauge and the thermometer cannot be seated into the instrument seating nipple under the high-temperature and high-pressure condition in the deep well ultra-deep well, the optical cable sensor is placed into the deep well ultra-deep well to monitor the underground pressure and the underground temperature in the production process.
Further, the perforating guns in the perforating gun group are full-bore perforating guns.
According to another aspect of the present invention, there is provided an operation method of a deep well and ultra-deep well integrated production completion string, comprising: the timing unit of the ground control box of the deep well and ultra-deep well integrated production completion string is used for timing the starting time interval and the single injection duration of the chemical injection device, so that the ground control box controls the starting and closing time of the chemical injection device, wherein the starting time interval and the single injection duration are preset values and can be modified.
Further, the open time interval is equal to the precipitation period of the preformed wax and colloidal asphaltenes.
Further, the operation method of the deep well and ultra-deep well integrated production completion string further comprises a determination method of single injection duration, and the determination method of the single injection duration comprises the following steps:
wherein t represents the duration of a single injection in hours; q represents the fluid production in cubic meters per second; s represents the internal diameter cross-sectional area of the tubing in square meters; h represents the distance from the chemical agent injection valve of the deep well and ultra-deep well integrated production completion pipe column to the well mouth, and the unit is meter.
Further, the operation method of the deep well and ultra-deep well integrated production completion string further comprises the following steps: and after the deep well and ultra-deep well integrated production completion string is lowered into the casing, the cavity between the casing and the deep well and ultra-deep well integrated production completion string and the part above the packer of the deep well and ultra-deep well integrated production completion string are filled with the completion fluid.
Further, the operation method of the deep well and ultra-deep well integrated production completion string further comprises the following steps: after the deep well and ultra-deep well integrated production and completion string is lowered into the casing, the completion fluid is filled into a cavity between the casing and the deep well and ultra-deep well integrated production and completion string and a part below a packer of the deep well and ultra-deep well integrated production and completion string to form a completion fluid layer, the perforation fluid is filled below the completion fluid layer to form a perforation fluid layer, and the bottom end of the perforation fluid layer is flush with an oil layer.
Further, the height of the perforation liquid layer is more than or equal to 100 meters.
Further, the operation method of the deep well and ultra-deep well integrated production and completion string further comprises a maintenance method for maintaining the part of the deep well and ultra-deep well integrated production and completion string, which is positioned above the packer of the deep well and ultra-deep well integrated production and completion string, wherein the maintenance method comprises the following steps: lowering a plug from a wellhead; after the blanking plug is lowered to the position below the instrument seat nipple of the deep well and ultra-deep well integrated production completion string, the blanking plug is lifted up so that the blanking plug is located in the instrument seat nipple; the pressure of the part of the deep well and ultra-deep well integrated production completion pipe column outside a well head is relieved; the deep well and ultra-deep well integrated production completion pipe column is reversely buckled in a forward rotating manner; lifting the deep well and ultra-deep well integrated production completion string to lift the part of the deep well and ultra-deep well integrated production completion string above the packer out of the well mouth; and (4) putting a new deep well and ultra-deep well integrated production completion pipe column and a sealing insertion pipe, and inserting the new deep well and ultra-deep well integrated production completion pipe column and the sealing insertion pipe into the packer.
Furthermore, the maintenance method for maintaining the part of the deep well and ultra-deep well integrated production completion string, which is positioned above the packer of the deep well and ultra-deep well integrated production completion string, further comprises the step of performing ball throwing and pressing operation after the blanking plug is seated in the instrument seating nipple and before the part of the deep well and ultra-deep well integrated production completion string, which is positioned outside the wellhead, is decompressed, and if the blanking plug is not tightly sealed, so that the ball throwing opening type circulating valve of the deep well and ultra-deep well integrated production completion string is opened to perform circulating well killing.
Furthermore, the maintenance method for maintaining the part of the deep well and ultra-deep well integrated production completion string, which is positioned above the packer of the deep well and ultra-deep well integrated production completion string, further comprises the step of taking out the packer after replacing a new deep well and ultra-deep well integrated production completion string.
By applying the technical scheme of the invention, the automatic control interval addition of the wax-dissolving agent on the ground is realized through the chemical agent injection valve, the wax precipitation of the wall of the oil pipe is prevented from blocking the oil pipe, the temperature and the pressure in the well can be monitored under the high-temperature and high-pressure conditions through the optical cable sensor, the production safety in the well is ensured, the detonation force during the detonation of the perforation can be counteracted through the reasonable design of the telescopic length of the upper telescopic short section and the telescopic length of the lower telescopic short section and the number of the shock absorber groups, the damage of the packer is prevented, the oil pipe can be replaced under the condition that the well shut-in of the packer is not changed when the part of the oil pipe above the packer is damaged in the production process, the operation flow of perforation, production, wax removal and prevention, fracturing and pressure replacement of the oil pipe under pressure and the downhole temperature and pressure monitoring in the production, the cost is saved, and the operation risk is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of the deep well and ultra-deep well integrated production completion string in the invention;
fig. 2 shows another structure diagram of the deep well and ultra-deep well integrated production completion string in the invention.
Wherein the figures include the following reference numerals:
10. an oil pipe; 20. a ground control box; 21. a catheter; 22. a photoelectric composite cable; 30. a downhole safety valve; 40. a chemical injection valve; 50. a ball-throwing open-type circulation valve; 60. a packer; 70. an instrument seating nipple; 80. a short joint capable of extending up and down; 90. a shock absorber group; 100. perforating a pipe; 110. a perforating gun group; 120. plugging with a thread; 130. an oil layer; 140. an optical cable sensor.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
The invention provides an integrated production well completion string for a deep well and an ultra-deep well and an operation method thereof, aiming at solving the problem of poor functionality of the production well completion string for the deep well and the ultra-deep well in the prior art.
The following operation method of the deep well ultra-deep well production completion string is adopted by the following deep well ultra-deep well production completion string.
As shown in fig. 1 to 2, the deep well and ultra-deep well integrated production completion string of the present invention comprises: the device comprises an oil pipe 10, a downhole safety valve 30, a chemical agent injection valve 40, a ball-throwing open type circulating valve 50, a packer 60, an instrument seat short section 70, a perforated pipe 100, a perforating gun group 110, a plug 120 and a ground control box 20 which are sequentially arranged on the oil pipe 10 from top to bottom. The surface control box 20 includes a chemical injection device connected to the chemical injection valve 40 through a liquid guide tube 21.
In this embodiment, the chemical injection device is an injection pump, the chemical flows through the liquid guide tube 21 via the injection pump, and is injected into the oil pipe 10 from the chemical injection valve 40, and the chemical is naturally coated on the inner wall of the oil pipe under the action of the production fluid, so as to dissolve the wax and the colloidal asphaltene. The packer 60 and perforating gun assembly 110 employ a staged setting perforation to prevent casing bursting during the perforation process.
Specifically, the ground control box 20 further includes a timing unit connected to the chemical injection device, so that the ground control box 20 controls an opening time interval of the chemical injection device and a single injection duration, where the opening time interval is equal to a precipitation period of the pre-fabricated wax and colloidal asphaltene. The method for determining the precipitation period of the preformed wax and colloid asphaltenes comprises the following steps: when wax or colloid asphaltene is separated out from the oil pipe 10, the inner diameter of the oil pipe 10 is reduced, the friction resistance along the way is increased, the oil pressure of the wellhead is reduced, and the time when the oil pressure of the wellhead is reduced to a preset value is the separation period of the wax and the colloid asphaltene.
As shown in fig. 1, the deep well and ultra-deep well integrated production completion string further comprises an upper telescopic short section 80 and a lower telescopic short section 90 which are arranged on the oil pipe 10, the upper telescopic short section 80 and the lower telescopic short section 80 are located above the shock absorber 90, the upper telescopic short section 80 and the lower telescopic short section 90 are located below the instrument landing short section 70 and above the perforating pipe 100, and the upper telescopic short section 80 and the lower telescopic short section 90 are used for counteracting detonation force during perforation detonation.
Specifically, the deformation quantity and the upward thrust to the packer 60 generated by the completion string for the integrated production of the deep well and ultra-deep well after perforation are calculated according to the volume of the lower part of the casing in the packer 60 and the energy generated by the explosion of the perforating charges of the perforating gun group 110. According to the calculation result, the telescopic length of the upper telescopic short joint 80 and the lower telescopic short joint 80 and the number of the shock absorber groups 90 are determined, so that the detonation force during perforation detonation is counteracted, and the damage or the incapability of the packer 60 caused by the detonation force is prevented.
As shown in fig. 2, the deep well and ultra-deep well integrated production completion string further comprises an optical cable sensor 140, the optical cable sensor 140 is connected with the ground control box 20 through a photoelectric composite cable 22, and when the pressure gauge and the temperature gauge cannot be seated in the instrument seating nipple 70 under the condition of high temperature and high pressure in the deep well and ultra-deep well, the optical cable sensor 140 is lowered into the deep well and ultra-deep well to monitor the downhole pressure and downhole temperature in the production process.
Specifically, when being in under the normal condition in the deep well ultra-deep well, ground wire car can go into pressure gauge and thermometer to the well, sits into instrument seat nipple 70 with pressure gauge and thermometer in order to monitor pressure and temperature in the well. However, when the deep well is in a high temperature and high pressure condition, the pressure gauge and the temperature gauge cannot be seated in the tool seating nipple 70, and thus the optical cable sensor 140 needs to be lowered into the deep well to monitor the downhole pressure and the downhole temperature during the production process. In addition, the optical cable sensor 140 is generally equipped with an electronic sensor, and the electronic sensor is also connected to the ground control box 20 through the optical/electrical composite cable 22. The electronic sensors can continue to monitor downhole pressure and downhole temperature when the fiber optic cable sensor 140 fails.
In the present embodiment, the perforating guns in perforating gun cluster 110 are full bore perforating guns. Perforating gun set 110 employs full-penetration perforating guns, which enable production instrumentation to be run into or through reservoir 130 for logging, i.e., production profile monitoring.
The operation method of the deep well and ultra-deep well integrated production completion pipe column comprises the following steps: the timing unit of the ground control box 20 of the deep well and ultra-deep well integrated production completion string is used for timing the starting time interval and the single injection duration of the chemical injection device, so that the ground control box 20 controls the starting and closing time of the chemical injection device, wherein the starting time interval and the single injection duration are preset values and can be modified.
Specifically, the open time interval is equal to the precipitation period of the preformed wax and colloidal asphaltenes. The method for determining the precipitation period of the preformed wax and colloid asphaltenes comprises the following steps: when wax or colloid asphaltene is separated out from the oil pipe 10, the inner diameter of the oil pipe 10 is reduced, the friction resistance along the way is increased, the oil pressure of the wellhead is reduced, and the time when the oil pressure of the wellhead is reduced to a preset value is the separation period of the wax and the colloid asphaltene.
Specifically, the operation method of the deep well and ultra-deep well integrated production completion string further comprises a determination method of single injection duration, and the determination method of the single injection duration comprises the following steps:
wherein t represents the duration of a single injection in hours; q represents the fluid production in cubic meters per second; s represents the internal diameter cross-sectional area of the tubing 10 in square meters; h represents the distance from the chemical agent injection valve 40 of the deep well and ultra-deep well integrated production completion string to the wellhead, and the unit is meter.
In this embodiment, when the thickness of the wax or colloid asphaltene deposited in the oil pipe 10 is 6 mm, the oil pressure at the wellhead is reduced to a preset value, and at this time wax removal is required, and the precipitation period of the wax or colloid asphaltene is 15 days, then the chemical injection device of the ground control box 20 injects the chemical into the downhole chemical injection valve 40 through the liquid guide tube 21 in a timed manner, and the opening time interval of the chemical injection device is 15 days. Calculating the duration of single injection: the liquid production amount is 200 cubic meters per day, the inner diameter of the oil pipe 10 is 69.84 millimeters, and the distance from the chemical injection valve 40 to the wellhead is 2000 meters, so that the injected chemical can just return to the wellhead. The run time of the chemical from the chemical injection valve 40 to the wellhead is 2000/[200/24/3600/(π 69.84)2*10-6)]The single injection time period is set to 4 hours when the time period is 13333 seconds and 4 hours, which ensures that the chemical is completely coated along the inner wall of the oil pipe 10, i.e., the opening time interval of the chemical injection device is 15 days, and the single injection time period is 4 hours.
In this embodiment, the operation method of the deep well and ultra-deep well integrated production completion string further includes: after the deep well and ultra-deep well integrated production and completion string is lowered into the casing, the cavity between the casing and the deep well and ultra-deep well integrated production and completion string and the part above the packer 60 of the deep well and ultra-deep well integrated production and completion string are filled with the completion fluid. The completion fluid can slow down the corrosion of the casing and prolong the service life of the casing.
In this embodiment, the operation method of the deep well and ultra-deep well integrated production completion string further includes: after the deep well and ultra-deep well integrated production and completion string is lowered into the casing, the completion fluid is filled into a cavity between the casing and the deep well and ultra-deep well integrated production and completion string and a part of the cavity below the packer 60 of the deep well and ultra-deep well integrated production and completion string to form a completion fluid layer, the perforation fluid is filled below the completion fluid layer to form a perforation fluid layer, and the bottom end of the perforation fluid layer is flush with the oil layer 130. Such that perforating gun assembly 110 perforates under perforating fluid conditions to prevent contamination of reservoir 130.
Specifically, the height of the perforation liquid layer is more than or equal to 100 meters. The height of the perforation fluid layer is thus high enough to protect the oil layer 130 from contamination of the oil layer 130.
The operation method of the deep well and ultra-deep well integrated production and completion string further comprises a maintenance method for maintaining the part of the deep well and ultra-deep well integrated production and completion string, which is positioned above the packer 60 of the deep well and ultra-deep well integrated production and completion string, wherein the maintenance method comprises the following steps: lowering a plug from a wellhead; after the position below the plug is positioned below an instrument landing nipple 70 of the deep well and ultra-deep well integrated production completion string, lifting the plug up to enable the plug to be seated in the instrument landing nipple 70; the pressure of the part of the deep well and ultra-deep well integrated production completion pipe column outside a well head is relieved; the deep well and ultra-deep well integrated production completion pipe column is reversely buckled in a forward rotating manner; lifting the deep well and ultra-deep well integrated production completion string to lift the part of the deep well and ultra-deep well integrated production completion string above the packer 60 from the well mouth; and a new deep well and ultra-deep well integrated production completion pipe column and a sealing insertion pipe are put in, and the new deep well and ultra-deep well integrated production completion pipe column and the sealing insertion pipe are inserted into the packer 60. This enables the tubing 10 to be replaced in shut-in conditions without changing the section below the packer 60.
In this embodiment, if the part above packer 60 damages because of reasons such as corruption in the production process, the blanking plug under the ground wire car, the blanking plug is passed instrument seat nipple 70 and is lifted up after, sits instrument seat nipple 70 and blocks up oil pipe 10 with sealed, realizes that the part that is located packer 60 below of deep well ultra-deep well integration commissioning completion tubular column seals. After the pressure of the part of the deep well and ultra-deep well integrated production completion string outside the well mouth is released, the deep well and ultra-deep well integrated production completion string is reversely turned in a forward rotating mode, the part of the deep well and ultra-deep well integrated production completion string above the packer 60 is put out, and a new deep well and ultra-deep well integrated production completion string and a sealing insertion pipe are put into the well, so that the new deep well and ultra-deep well integrated production completion string is inserted into the packer 60.
In this embodiment, the method for maintaining the portion of the deep well and ultra-deep well integrated production completion string above the packer 60 further comprises, after the packer is seated in the instrument seating nipple 70 and before the portion of the deep well and ultra-deep well integrated production completion string outside the wellhead is depressurized, if the packer is not tightly sealed, performing a ball-throwing and pressing operation to open the ball-throwing open-type circulation valve 50 of the deep well and ultra-deep well integrated production completion string for well-killing.
In this embodiment, the method for repairing the portion of the deep-well and ultra-deep-well integrated production completion string located above the packer 60 further comprises removing the packer after replacing a new deep-well and ultra-deep-well integrated production completion string. After the plug is removed, the production operation can be carried out.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. the automatic control interval addition of the wax-dissolving agent on the ground is realized, and the wax precipitation on the wall of the oil pipe is prevented from blocking the oil pipe.
2. The temperature and the pressure in the well can be monitored under the conditions of high temperature and high pressure, and the production safety in the well is ensured.
3. The telescopic length of the upper telescopic short section and the number of the shock absorbers are reasonably designed, so that the detonation force during perforation detonation can be offset, and the damage of the packer is prevented.
4. When the part of the oil pipe above the packer is damaged in the production process, the oil pipe can be replaced under the condition that the well shut-in of the packer is not changed.
5. The operation flow of perforating, producing, paraffin removing and preventing, fracturing and oil pipe replacing under pressure by one string and the underground temperature and pressure monitoring in the production process are realized, so that the functionality of the well completion string for the production of the deep well ultra-deep well is greatly improved, the cost is saved, and the operation risk is reduced.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255120A (en) * | 2023-03-15 | 2023-06-13 | 中国海洋石油集团有限公司 | Carbon dioxide sealing well completion device and method |
| CN116571869A (en) * | 2023-05-30 | 2023-08-11 | 西南石油大学 | Metal pipe column hot-melt cutting device used in pressure environment |
| CN116611154A (en) * | 2023-07-13 | 2023-08-18 | 中国矿业大学(北京) | Deep well multidimensional energy-reducing shock absorption and multistage energy-absorbing shock resistance method |
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| CN116255120A (en) * | 2023-03-15 | 2023-06-13 | 中国海洋石油集团有限公司 | Carbon dioxide sealing well completion device and method |
| CN116571869A (en) * | 2023-05-30 | 2023-08-11 | 西南石油大学 | Metal pipe column hot-melt cutting device used in pressure environment |
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| CN116611154B (en) * | 2023-07-13 | 2023-09-12 | 中国矿业大学(北京) | Deep well multidimensional energy-reducing shock absorption and multistage energy-absorbing shock resistance method |
| CN117868803A (en) * | 2024-03-13 | 2024-04-12 | 中石化西南石油工程有限公司 | Four-combined test pipe column suitable for ultra-deep well oil and gas well and use method thereof |
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