CN114233251A - Integrated well abandoning operation technology - Google Patents
Integrated well abandoning operation technology Download PDFInfo
- Publication number
- CN114233251A CN114233251A CN202111631319.0A CN202111631319A CN114233251A CN 114233251 A CN114233251 A CN 114233251A CN 202111631319 A CN202111631319 A CN 202111631319A CN 114233251 A CN114233251 A CN 114233251A
- Authority
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- China
- Prior art keywords
- well
- cement
- rectangular
- perforating
- perforating gun
- 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.)
- Pending
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 41
- 238000004880 explosion Methods 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000013461 design Methods 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims description 24
- 238000004140 cleaning Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 229910052601 baryte Inorganic materials 0.000 claims description 4
- 239000010428 baryte Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000005465 channeling Effects 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011083 cement mortar Substances 0.000 abstract description 3
- 239000002360 explosive Substances 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21B43/117—Shaped-charge perforators
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of petroleum and natural gas, in particular to an integrated well abandoning operation technology, which comprises the following steps: s1, perforating: the method comprises the following steps that a rectangular perforating gun enters a well abandoning pipeline needing well abandoning operation, and after the rectangular perforating gun reaches a specified position through computer control, a hole of the rectangular perforating gun is used for generating energy-gathered explosion to puncture a casing; the rectangular perforating gun provides enough surface area for perforating due to unique groove-shaped structural design, and the rectangular perforating gun is easier to obtain larger flow sectional area compared with explosive perforating, so that later-stage well cementation cement is squeezed into the cement through pumping, the cement flows into the rectangular groove, the fixing effect of cement mortar can be well improved after solidification, gaps generated by gas and liquid from a vertical channel can be cut off, the channel is permanently sealed by a shaft annulus, and the well abandoning operation and the well cementation quality are ensured.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas, in particular to an integrated well abandoning operation technology.
Background
In the later development stage of oil and gas wells, well abandoning operation of wells is generally required to be performed on the wells and generally comprises permanent well abandoning operation and temporary well abandoning operation, and the main purpose of the well abandoning operation is to reduce the occurrence of blowout to reduce the environmental pollution and the waste of oil and gas caused by accidental leakage blowout of abandoned oil fields.
Therefore, the research on integration, perforating by one-trip drilling operation tool, high-pressure cleaning and well cementation which are matched with abandoned wells and can combine the advantages of operation processes and avoid the disadvantages of the abandoned wells becomes an operation problem which needs to be solved urgently in each oil and gas field.
The traditional well abandoning operation time is long, and the contact area of the cement of well cementation and the well is small, thereby leading to the well cementation effect not good, thereby influencing the result of use in later stage, especially have the emergence of the possibility of kicking open the cement in abandoning the well when abandoning the oil pressure in the well is higher, so need one kind and can solve this technical problem abandon well operation technique.
Disclosure of Invention
In order to overcome the above-mentioned defects of the prior art, the present invention provides an integrated well abandoning operation technology to solve the above-mentioned problems in the background art.
The invention provides the following technical scheme: an integrated well abandoning operation technology comprises the following steps:
s1, perforating: the method comprises the steps that a rectangular perforating gun enters a well abandoning pipeline needing well abandoning operation, after the rectangular perforating gun reaches a specified position through computer control, a sleeve is punctured through energy-gathered explosion generated by holes of the rectangular perforating gun, meanwhile, a series of horizontal rectangular grooves are formed through computer control, meanwhile, the computer control ensures that the horizontal rectangular grooves generated by a sleeve punctured by the energy-gathered explosion emitted by the rectangular perforating gun can be accurately overlapped, the overlapped horizontal rectangular grooves form 360-degree annular channels on the sleeve or an oil pipe, and then, a perforation can penetrate through the gaps between the sleeve and cement and between the cement and a stratum;
s2, high-pressure spray washing: by adopting high-pressure cleaning of cement debris in the annular space of the perforating sleeve, irregular positioning positions of nozzles subjected to high-pressure spray cleaning and optimal design angles and quantity calculated by a computer, the flow velocity of jet flow in the touch nozzle is controlled by the computer, so that the jet flow can penetrate through a plurality of perforating sleeves and the annular space to thoroughly clean rock debris, old slurry, barite, old rock debris and the like in the perforating sleeves, and after the complete cleaning is finished;
s3, cementing: after the high-pressure spray washing is finished, well cementation operation is carried out, the activated well cementation tool is used for circularly cleaning, then the plugging material is squeezed and injected on the cross section of the annulus, the rheological property of cement is improved through a well cementation tool pump, a higher-quality cement cementing surface is brought, the formation of channeling and micro-annular spaces is reduced, and therefore the plugging material is effectively squeezed and injected into a shaft and the annulus, and in a well, after the plugging material is thoroughly molded along with the time, the well cementation operation can be finished.
Furthermore, the energy-gathered explosion of the S1 is generated by the explosion of the computer controller, the 360-degree annular channel is generated by the energy-gathered explosion after the rectangular perforating gun rotates in the casing, through the adoption of the unique groove-shaped structure design, enough surface area can be provided for perforating, and the rectangular perforating gun is easier to obtain larger flow cross section area compared with the explosive perforating, so that the later well abandoning operation and well cementation quality are ensured.
Further, the high-pressure spray rinsing tool of S2 can be opened in a ball-throwing or hydraulic mode, the discharge capacity and the pressure of the high-pressure spray rinsing tool are controlled by a computer, the discharge capacity of the high-pressure spray rinsing tool is controlled from slow to fast and reaches 15m at most3And the discharge capacity of the high-pressure spray washing tool is slowly increased, so that the sediment of the abandoned well cannot generate blowout when meeting the high-pressure spray washing jet flow, and the environmental pollution caused by the blowout is prevented.
Furthermore, the cementing tool pump of S3 controls the flow rate of the cement pumped in through a computer, the pressure bearing of a pumping pressure tool of the cementing tool pump is 105Mpa, and the pumping pressure can be adjusted in real time according to the operation requirement, so that the poured cement mortar can reduce the gaps after solidification.
Further, the selection of cement is determined by the temperature in the S3 well, pure G-grade cement is selected when the temperature in the well is lower than 110 ℃, and G-grade sand-adding cement is selected when the temperature in the well is higher than 110 ℃; the cement required by well cementation is limited according to the actual temperature in the abandoned well, the cement can be squeezed into the abandoned well through pumping, and the influence of the temperature in the well on the cement after later-stage drying is small, so that the strength of well cementation is increased.
The invention has the technical effects and advantages that:
1. the rectangular perforating gun is beneficial to adopting a unique groove-shaped structural design, can provide enough surface area for perforating, and is easier to obtain larger flow cross section area compared with explosive perforating, so that later-stage well cementation cement is squeezed into the cement through pumping, meanwhile, the cement flows into the rectangular groove, the fixing effect of cement mortar can be well improved after solidification, a gap generated by gas and liquid from a vertical channel is cut off, the channel is permanently sealed by a shaft annulus, a perfect isolation zone is formed, and the well abandoning operation and the well cementation quality are ensured.
2. The high-pressure spray washing tool can be activated and started in a ball throwing or hydraulic mode through high-pressure spray washing. The high-displacement, high-pressure jetting tool ensures optimal conditions for casing annulus cleaning, with cuttings, old mud, barite and old cuttings being replaced by clean mud. The high-pressure jet cleaning tool is suitable for various liquid systems such as slurry, clear water, frictioning, fracturing fluid systems and the like and various operating environments.
Detailed Description
The technical solution of the present invention will be clearly and completely described below in conjunction with the present invention, and the forms of the respective structures described in the following embodiments are merely examples, and the integrated well abandoning operation technology according to the present invention is not limited to the respective structures described in the following embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
The invention provides an integrated well abandoning operation technology, which comprises the following steps:
s1, perforating: the method comprises the steps that a rectangular perforating gun enters a well abandoning pipeline needing well abandoning operation, after the rectangular perforating gun reaches a specified position through computer control, a sleeve is punctured through energy-gathered explosion generated by holes of the rectangular perforating gun, a series of horizontal rectangular grooves are formed through computer control, accurate overlapping of the horizontal rectangular grooves generated by a sleeve punctured through the energy-gathered explosion emitted by the rectangular perforating gun can be guaranteed through computer calculation, the overlapped horizontal rectangular grooves form 360-degree annular channels on the sleeve or an oil pipe, and then the perforating gun can penetrate through the gaps between the sleeve and cement and between the cement and a stratum.
S2, high-pressure spray washing: by adopting the high-pressure cleaning of the cement fragments in the middle annular space of the perforating sleeve, the irregularity of the positioning position of the nozzle through high-pressure spray cleaning and the optimal design angle and the number calculated by the computer, the flow velocity of the jet flow in the touch nozzle is controlled by the computer, so that the jet flow can penetrate through a plurality of perforating sleeves and the annular space to thoroughly clean rock debris, old slurry, barite, old rock debris and the like in the perforating sleeves, and after the thorough cleaning is finished.
S3, cementing: after the high-pressure spray washing is finished, well cementation operation is carried out, the activated well cementation tool is used for circularly cleaning, then the plugging material is squeezed and injected on the cross section of the annulus, the rheological property of cement is improved through a well cementation tool pump, a higher-quality cement cementing surface is brought, the formation of channeling and micro-annular spaces is reduced, and therefore the plugging material is effectively squeezed and injected into a shaft and the annulus, and in a well, after the plugging material is thoroughly molded along with the time, the well cementation operation can be finished.
In a preferred embodiment, the energy-gathering explosion of S1 is generated by the power generated by explosion of a computer controller, a 360-degree annular channel is generated by energy-gathering explosion after a rectangular perforating gun rotates in a casing, sufficient surface area can be provided for perforating by adopting a unique groove-shaped structure design, and the rectangular perforating gun is easier to obtain larger flow cross section area compared with explosion perforating, so that later well abandoning operation and well cementation quality are ensured.
In a preferred embodiment, the high-pressure spray tool of S2 can be opened by ball throwing or hydraulic pressure, the discharge capacity and pressure of the high-pressure spray tool are controlled by a computer, and the discharge capacity of the high-pressure spray tool is controlled from slow to fast and reaches 15m at most3And the discharge capacity of the high-pressure spray washing tool is slowly increased, so that the sediment of the abandoned well cannot generate blowout when meeting the high-pressure spray washing jet flow, and the environmental pollution caused by the blowout is prevented.
In a preferred embodiment, the cementing tool pump of S3 controls the pumped cement flow rate through a computer, the pressure bearing of the pumping tool of the cementing tool pump is 105MPa, and the pumping pressure is adjusted in real time according to the operation requirement, so that the pumping pressure of different cementing liquids can be changed according to the pumping of the different cementing liquids and the influence of temperature, and the strength of the cementing liquids can be changed.
In a preferred embodiment, the temperature in the S3 well determines the selection of cement, pure G-grade cement is selected when the temperature in the well is lower than 110 ℃, and G-grade sand cement is selected when the temperature in the well is higher than 110 ℃; the cement required by well cementation is limited according to the actual temperature in the abandoned well, the cement can be squeezed into the abandoned well through pumping, and the influence of the temperature in the well on the cement after later-stage drying is small, so that the strength of well cementation is increased.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the disclosed embodiment of the invention, only the structures related to the disclosed embodiment are related, other structures can refer to common design, and the same embodiment and different embodiments of the invention can be combined with each other under the condition of no conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (5)
1. The integrated well abandoning operation technology is characterized by comprising the following steps:
s1, perforating: the method comprises the steps that a rectangular perforating gun enters a well abandoning pipeline needing well abandoning operation, after the rectangular perforating gun reaches a specified position through computer control, a sleeve is punctured through energy-gathered explosion generated by holes of the rectangular perforating gun, meanwhile, a series of horizontal rectangular grooves are formed through computer control, meanwhile, the computer control ensures that the horizontal rectangular grooves generated by a sleeve punctured by the energy-gathered explosion emitted by the rectangular perforating gun can be accurately overlapped, the overlapped horizontal rectangular grooves form 360-degree annular channels on the sleeve or an oil pipe, and then, a perforation can penetrate through the gaps between the sleeve and cement and between the cement and a stratum;
s2, high-pressure spray washing: by adopting high-pressure cleaning of cement debris in the annular space of the perforating sleeve, irregular positioning positions of nozzles subjected to high-pressure spray cleaning and optimal design angles and quantity calculated by a computer, the flow velocity of jet flow in the touch nozzle is controlled by the computer, so that the jet flow can penetrate through a plurality of perforating sleeves and the annular space to thoroughly clean rock debris, old slurry, barite, old rock debris and the like in the perforating sleeves, and after the complete cleaning is finished;
s3, cementing: after the high-pressure spray washing is finished, well cementation operation is carried out, the activated well cementation tool is used for circularly cleaning, then the plugging material is squeezed and injected on the cross section of the annulus, the rheological property of cement is improved through a well cementation tool pump, a higher-quality cement cementing surface is brought, the formation of channeling and micro-annular spaces is reduced, and therefore the plugging material is effectively squeezed and injected into a shaft and the annulus, and in a well, after the plugging material is thoroughly molded along with the time, the well cementation operation can be finished.
2. The integrated well abandonment operation technique of claim 1, wherein: the shaped charges of S1 are generated by the force of the charges generated by the computer controller, and the 360 ° annular channel is shaped charges by the rectangular perforating gun after rotating in the casing.
3. The integrated well abandonment operation technique of claim 1, wherein: s2 ' S high pressure spray rinsing instrument accessible bowling or hydraulic pressure ' S mode is opened, high pressure spray rinsing instrument ' S discharge capacity and pressure are controlled through the computer, high pressure spray rinsing discharge capacity is by slow to fast, reaches 15m the highest3In terms of hours.
4. The integrated well abandonment operation technique of claim 1, wherein: the cementing tool pump of S3 controls the flow rate of cement pumped in through a computer, the pressure bearing of the pumping pressure tool of the cementing tool pump is 105Mpa, and the pumping pressure is adjusted in real time according to the operation requirement.
5. The integrated well abandonment operation technique of claim 1, wherein: and the temperature in the S3 well determines the selection of cement, pure G-grade cement is selected when the temperature in the well is lower than 110 ℃, and G-grade sand cement is selected when the temperature in the well is higher than 110 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111631319.0A CN114233251A (en) | 2021-12-28 | 2021-12-28 | Integrated well abandoning operation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111631319.0A CN114233251A (en) | 2021-12-28 | 2021-12-28 | Integrated well abandoning operation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114233251A true CN114233251A (en) | 2022-03-25 |
Family
ID=80743903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111631319.0A Pending CN114233251A (en) | 2021-12-28 | 2021-12-28 | Integrated well abandoning operation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114233251A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015026239A2 (en) * | 2013-08-21 | 2015-02-26 | Archer Oil Tools As | One trip perforating and washing tool for plugging and abandoning wells |
| US20150053405A1 (en) * | 2013-08-21 | 2015-02-26 | Archer Oil Tools As | One trip perforating and washing tool for plugging and abandoning wells |
| CN109372465A (en) * | 2018-09-29 | 2019-02-22 | 中国石化江汉油田分公司江汉采油厂 | A kind of method for blocking for empty well cylinder abandoned well |
| US20190309606A1 (en) * | 2018-04-06 | 2019-10-10 | Dynaenergetics Gmbh & Co. Kg | Perforating gun system and method of use |
| US20200173249A1 (en) * | 2017-06-07 | 2020-06-04 | Ardyne Holdings Limited | Improvements In Or Relating To Well Abandonment |
| CN112313470A (en) * | 2018-06-11 | 2021-02-02 | 德力能欧洲有限公司 | Corrugated liner for rectangular slotted shaped charge |
| US20210230964A1 (en) * | 2019-03-13 | 2021-07-29 | Halliburton Energy Services, Inc. | Single trip wellbore cleaning and sealing system and method |
-
2021
- 2021-12-28 CN CN202111631319.0A patent/CN114233251A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015026239A2 (en) * | 2013-08-21 | 2015-02-26 | Archer Oil Tools As | One trip perforating and washing tool for plugging and abandoning wells |
| US20150053405A1 (en) * | 2013-08-21 | 2015-02-26 | Archer Oil Tools As | One trip perforating and washing tool for plugging and abandoning wells |
| US20200173249A1 (en) * | 2017-06-07 | 2020-06-04 | Ardyne Holdings Limited | Improvements In Or Relating To Well Abandonment |
| US20190309606A1 (en) * | 2018-04-06 | 2019-10-10 | Dynaenergetics Gmbh & Co. Kg | Perforating gun system and method of use |
| CN112313470A (en) * | 2018-06-11 | 2021-02-02 | 德力能欧洲有限公司 | Corrugated liner for rectangular slotted shaped charge |
| CN109372465A (en) * | 2018-09-29 | 2019-02-22 | 中国石化江汉油田分公司江汉采油厂 | A kind of method for blocking for empty well cylinder abandoned well |
| US20210230964A1 (en) * | 2019-03-13 | 2021-07-29 | Halliburton Energy Services, Inc. | Single trip wellbore cleaning and sealing system and method |
Non-Patent Citations (1)
| Title |
|---|
| 胡盛忠主编: "石油工业新技术与标准规范手册：石油测井新技术及标准规范 第3卷", 辽宁科学技术出版社, pages: 1341 - 1342 * |
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