CN104632130A - Workover well completion process - Google Patents
Workover well completion process Download PDFInfo
- Publication number
- CN104632130A CN104632130A CN201410725026.2A CN201410725026A CN104632130A CN 104632130 A CN104632130 A CN 104632130A CN 201410725026 A CN201410725026 A CN 201410725026A CN 104632130 A CN104632130 A CN 104632130A
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- Prior art keywords
- well
- screen casing
- gravel
- setting
- completing process
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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
- E21B43/02—Subsoil filtering
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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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a workover well completion process which is mainly used for filling the bottom of an oil well. The process comprises the steps that a gauge cutter is tripped in, wherein the gauge cutter is tripped in a well to the first set depth; pipe scraping is carried out, wherein a setting well segment and the portions above and below the setting sell segment by the set distance are repeatedly scraped by a tube scraper, and then the tube scraper is taken out; screen pipes are tripped in, wherein the sequentially connected screen pipes are tripped in a sleeve pipe in the well until the top ends of the screen pipes are located at the second set depth; backing off is carried out, wherein a packer is pressed, and setting and backing off are achieved; gravel is tripped in, wherein the screen pipes are filled with the gravel. The workover well completion process can effectively solve the problem that the screen pipes tripped to the bottom of the oil well are broken through or a filter assembly falls off.
Description
Technical field
The present invention relates to technical field of petroleum extraction, more particularly, relate to a kind of large well workover well-completing process.
Background technology
Since mid-late oilfield development, oil well condition is increasingly sophisticated, each layer position development time, strata pressure, permeability not identical, cause in production shake out serious.Particularly shallow-layer loose sand, compaction is poor, and the cementing difference in rock stratum is not obvious, in operation sand washing process, formation sand production is serious, causes follow-up sand washing process to complete, the oil-water well measuring greatly quicksand also can cause ground subsidence, casing deformation, and oil field production capacity is reduced greatly.
In order to ensure the use of oil well, also need to carry out large repairs to the serious oil well that shakes out.Particularly, should to carrying out large repairs to the bottom of oil well, oil reservoir portion and top respectively, wherein oil reservoir portion is the well section that oil well is arranged in oil reservoir, and bottom refers to the well section be positioned at below oil reservoir, and top is the well section be positioned at above oil reservoir.Large well workover well-completing process of the prior art comprises screen casing under the bottom of oil well and/or the inside pipe casing on top, if sleeve pipe is intact and shake out serious, can carries out lower screen casing realize top filling well-completing process to the top of oil well.If the oil reservoir portion of oil well and bottom shake out seriously, then the bottom of oil well can carry out lower screen casing and realize bottom filling well-completing process.But usually there is the phenomenons such as breakdown or its sand control filter assemblies comes off to during the bottom of oil well under screen casing, cause sand controlling result undesirable.
In sum, the problem that the breakdown or filter assemblies of the screen casing under how effectively solving bottom oil well comes off is current those skilled in the art's urgent problem.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of large well workover well-completing process, this large well workover well-completing process can solve the problem that the breakdown or filter assemblies of screen casing under system bottom oil well comes off effectively.
In order to achieve the above object, the invention provides following technical scheme:
A kind of large well workover well-completing process, is mainly used in carrying out filling to the bottom of oil well, comprises step:
Lower drift size gauge tool, lower drift size gauge tool to the first set depth in well;
Pipe cleaning, adopt pipeline scraper to setting well section and up and down setpoint distance repeatedly trip out pipeline scraper after scraping;
Lower screen casing, by packer by multiple screen casing connected successively down in the sleeve pipe of well, until the top of screen casing is positioned at the second set depth place;
Give up, packer is suppressed, realize setting and give up;
Lower gravel, fills gravel in described screen casing.
Preferably, in above-mentioned large well workover well-completing process, described first set depth and the second set depth are all positioned at below oil reservoir.
Preferably, in above-mentioned large well workover well-completing process, under described step, before drift size gauge tool, also step is comprised:
Lower well killing fluid, by high-pressure pump to pressure injection well killing fluid in well, until well killing fluid liquid level is positioned at the 3rd set depth place.
Preferably, in above-mentioned large well workover well-completing process, described step pipe cleaning is specially:
Pipeline scraper is adopted to trip out pipeline scraper to after setting well section and upper and lower 15 meters of scrapings three times thereof.
Preferably, in above-mentioned large well workover well-completing process, pass through screw thread fixed seal connection between multiple screen casing in described step screen casing, and the screw thread place of screen casing scribbles dope.
Preferably, in above-mentioned large well workover well-completing process, described step is given up and is also comprised step between lower gravel:
Play screen casing, upwards work the screen casing after giving up to setting height, whether the screen casing detected after giving up damages.
Preferably, in above-mentioned large well workover well-completing process, under described step, gravel is specially:
Gravel pack tubing string under Xiang Jingzhong, lower band is without box cupling intubate, under setting active force, the described filling channel touching described gravel pack tubing string without box cupling intubate, complete docking without box cupling intubate and fill pipe, by ground pump truck to pack gravel in screen casing, after filling, trip out gravel pack tubing string.
Preferably, in above-mentioned large well workover well-completing process, under described step, after gravel, also step is comprised:
Well-flushing is until clear water is shown in water outlet repeatedly.
Preferably, in above-mentioned large well workover well-completing process, under described step, after gravel, also step is comprised:
Inject the organic plugging thing of the hole of high-temp liquid thawing or dissolving screen casing.
Large well workover well-completing process provided by the invention, be mainly used in carrying out filling to the bottom of oil well, it comprises step:
S1: lower drift size gauge tool, lower drift size gauge tool to the first set depth in well;
Namely in well, whether lower drift size gauge tool is unblocked to detect down-hole.Particularly, whether the internal diameter that drift size gauge tool can detect well meets standard, the maximum size can passed through after whether the sleeve pipe of manhole is out of shape or is out of shape.Only have when detecting that down-hole is unblocked by drift size gauge tool, then carry out subsequent step, can not be damaged when so can to ensure under Other Instruments such as pipeline scraper or screen casing etc. in well.Drift size gauge tool should down to the first set depth in well, and wherein the first set depth is the position of span well head first set depth value, and the occurrence of the first set depth can set according to actual conditions.
S2: pipe cleaning, adopt pipeline scraper to setting well section and up and down setpoint distance repeatedly trip out pipeline scraper after scraping;
Namely in well, lower pipeline scraper is upper and lower to setting well section, then uses pipeline scraper to carry out scraping to setting well section, setting well section top to setpoint distance place above it and setting well section bottom to setpoint distance place below it, is cleaned by the foreign material in well.Wherein the value of setpoint distance is apart from the position of setting well section bottom setpoint distance or the position apart from setting well section top setpoint distance.
S3: lower screen casing, by packer by multiple screen casing connected successively down in the sleeve pipe of well, until the top of screen casing is positioned at the second set depth place;
By packer lower multiple screen casing connected successively in the sleeve pipe of well, until the top of screen casing is positioned at the second set depth place.Same as the prior art, multiple screen casing connects successively along axis, and after namely connecting, the axis of multiple screen casing overlaps.After lower screen casing, the top being positioned at the screen casing of the top is positioned at the second set depth place.
S4: give up, suppresses packer, realizes setting and gives up;
Namely carry out ground to suppress, and then realize setting and give up.
S5: lower gravel, fills gravel in described screen casing.
Finally, in the screen casing of down-hole, gravel is filled.
Apply large well workover well-completing process provided by the invention when carrying out completion, due under Xiang Jingzhong screen casing, setting and after giving up also to screen casing in be filled with a large amount of gravel, the screen casing inside of down-hole like this is containing a large amount of gravel, screen casing wall and its inner gravel is made jointly to bear active force from the external world, so when extraneous shock screen casing, not easily screen casing is punctured and also not easily make screen casing distortion or filtration members come off, ensure that the integrity of screen casing, make it not fragile.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The flow chart of the large well workover well-completing process that Fig. 1 provides for an embodiment of the present invention;
The flow chart of the large well workover well-completing process that Fig. 2 provides for the another kind of embodiment of the present invention.
Detailed description of the invention
The object of the present invention is to provide a kind of large well workover well-completing process, this large well workover well-completing process can solve the problem that the breakdown or filter assemblies of screen casing under system bottom oil well comes off effectively.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, the large well workover well-completing process that the embodiment of the present invention provides, be mainly used in carrying out filling to the bottom of oil well, it comprises step:
S1: lower drift size gauge tool, lower drift size gauge tool to the first set depth in well;
Namely in well, whether lower drift size gauge tool is unblocked to detect down-hole.Particularly, whether the internal diameter that drift size gauge tool can detect well meets standard, the maximum size can passed through after whether the sleeve pipe of manhole is out of shape or is out of shape.Only have when detecting that down-hole is unblocked by drift size gauge tool, then carry out subsequent step, can not be damaged when so can to ensure under Other Instruments such as pipeline scraper or screen casing etc. in well.Drift size gauge tool should down to the first set depth in well, and wherein the first set depth is the position of span well head first set depth value, and the occurrence of the first set depth can set according to actual conditions.Wherein, the first set depth place should be positioned at below setting well section.
S2: pipe cleaning, adopt pipeline scraper to setting well section and up and down setpoint distance repeatedly trip out pipeline scraper after scraping;
Namely in well, lower pipeline scraper is upper and lower to setting well section, then uses pipeline scraper to carry out scraping to setting well section, setting well section top to setpoint distance place above it and setting well section bottom to setpoint distance place below it, is cleaned by the foreign material in well.Wherein the value of setpoint distance is apart from the position of setting well section bottom setpoint distance or the position apart from setting well section top setpoint distance.
S3: lower screen casing, by packer by multiple screen casing connected successively down in the sleeve pipe of well, until the top of screen casing is positioned at the second set depth place;
By packer lower multiple screen casing connected successively in the sleeve pipe of well, until the top of screen casing is positioned at the second set depth place.Same as the prior art, multiple screen casing connects successively along axis, and after namely connecting, the axis of multiple screen casing overlaps.After lower screen casing, the top being positioned at the screen casing of the top is positioned at the second set depth place.Second set depth place also should be positioned at below setting well section.
S4: give up, suppresses packer, realizes setting and gives up;
Namely carry out ground to suppress, and then realize setting and give up.
S5: lower gravel, fills gravel in described screen casing.
Finally, in the screen casing of down-hole, gravel is filled.
When the large well workover well-completing process that the application embodiment of the present invention provides carries out completion, due under Xiang Jingzhong screen casing, setting and after giving up also to screen casing in be filled with a large amount of gravel, the screen casing inside of down-hole like this is containing a large amount of gravel, screen casing wall and its inner gravel is made jointly to bear active force from the external world, so when extraneous shock screen casing, not easily screen casing is punctured and also not easily make screen casing distortion or filtration members come off, ensure that the integrity of screen casing, make it not fragile.
The packer used in the present invention is big orifice packer, this kind of packer adopt waterpower setting, on put forward deblocking, the setting structure simultaneously completed of giving up, be divided into generally setting, give up, main body conciliates back cover part.Setting part mainly hydraulic system, can produce enough setting power, and part of giving up is made up of elastic claw, guiding valve and support member, and guiding valve moves and controlled by pin, and after cutting off pin, support member is released spring detent by guiding valve, above carries screen casing and gives up.The number of every meter, the screen casing used in the present invention containing filtration members is 150-245, and the minimum filter gap of screen casing is 0.1-0.3mm, and the effective filtration area of screen casing is 350-650cm
2/ m.
In order to optimize technique scheme further, wherein the first set depth and the second set depth can all be positioned at below oil reservoir, in this no limit.
As shown in Figure 2, in addition, in order to prevent the situations such as blowout, under step, also step S0 is comprised before drift size gauge tool: lower well killing fluid, by high-pressure pump to pressure injection well killing fluid in well, until well killing fluid liquid level is positioned at the 3rd set depth place.Namely in well, inject well killing fluid by high-pressure pump, prevent blowout from occurring by the high pressure of well killing fluid.Wherein, when the liquid level of injection well killing fluid is positioned at the 3rd set depth place, stop the injection of well killing fluid, the 3rd set depth should be positioned at below oil reservoir, in this no limit.
Wherein step pipe cleaning can be specially: adopt pipeline scraper to trip out pipeline scraper to after setting well section and upper and lower 15 meters of scrapings three times thereof.Namely adopt pipeline scraper extremely to carry out scraping three times apart from its 15 meters of to setting well section, setting well section top to apart from its 15 meters of and setting well section bottom, then trip out pipeline scraper.Namely setpoint distance is 15 meters, can also be 12-18 rice certainly.When carrying out scraping, foreign material discharge capacity can control at more than 0.5m3/min.
It should be noted that, can screw thread fixed seal connection be passed through between multiple screen casing in screen casing step, be threaded between two namely adjacent screen casings.In order to ensure sealing, the screw thread place of screen casing also scribbles dope.Certainly, two adjacent screen casings can also be welded to each other, in this no limit.
In order to ensure not damaged down to the screen casing in well, step is given up and is also comprised step between lower gravel: play screen casing, upwards work the screen casing after giving up to setting height, and whether the screen casing detected after giving up damages.Namely upwards mention the screen casing after hand, power during by mentioning judges whether multiple screen casing ruptures, and so can detect whether multiple screen casing damages.
Preferably, under step, gravel is specially: gravel pack tubing string under Xiang Jingzhong, lower band is without box cupling intubate, under setting active force, the described filling channel touching described gravel pack tubing string without box cupling intubate, complete docking without box cupling intubate and fill pipe, by ground pump truck to pack gravel in screen casing, after filling, trip out gravel pack tubing string.Further, gravel can also be filled in the stratum of the gap between sleeve pipe and screen casing and jacket exterior.Carry gravel pack tubing string up and down in the cooperation of slip well head after end-of-fill, packing tool cuts out automatically, trips out gravel pack tubing string.
Further, in order to ensure the normal use of well, under step, also step is comprised after gravel: well-flushing is until clear water is shown in water outlet repeatedly.
In order to prevent the space of handsome pipe from blocking, under step, after gravel, also comprise the organic plugging thing that step injects the hole of high-temp liquid thawing or dissolving screen casing in well.
In this manual, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a large well workover well-completing process, is mainly used in carrying out filling to the bottom of oil well, it is characterized in that, comprise step:
Lower drift size gauge tool, lower drift size gauge tool to the first set depth in well;
Pipe cleaning, adopt pipeline scraper to setting well section and up and down setpoint distance repeatedly trip out pipeline scraper after scraping;
Lower screen casing, by packer by multiple screen casing connected successively down in the sleeve pipe of well, until the top of screen casing is positioned at the second set depth place;
Give up, packer is suppressed, realize setting and give up;
Lower gravel, fills gravel in described screen casing.
2. large well workover well-completing process according to claim 1, is characterized in that, described first set depth and the second set depth are all positioned at below oil reservoir.
3. large well workover well-completing process according to claim 1, is characterized in that, also comprise step under described step before drift size gauge tool:
Lower well killing fluid, by high-pressure pump to pressure injection well killing fluid in well, until well killing fluid liquid level is positioned at the 3rd set depth place.
4. large well workover well-completing process according to claim 1, is characterized in that, described step pipe cleaning is specially:
Pipeline scraper is adopted to trip out pipeline scraper to after setting well section and upper and lower 15 meters of scrapings three times thereof.
5. large well workover well-completing process according to claim 1, is characterized in that, pass through screw thread fixed seal connection, and the screw thread place of screen casing scribbles dope in described step screen casing between multiple screen casing.
6. large well workover well-completing process according to claim 1, is characterized in that, described step is given up and also comprised step between lower gravel:
Play screen casing, upwards work the screen casing after giving up to setting height, whether the screen casing detected after giving up damages.
7. large well workover well-completing process according to claim 1, it is characterized in that, under described step, gravel is specially:
Gravel pack tubing string under Xiang Jingzhong, lower band is without box cupling intubate, under setting active force, the described filling channel touching described gravel pack tubing string without box cupling intubate, complete docking without box cupling intubate and fill pipe, by ground pump truck to pack gravel in screen casing, after filling, trip out gravel pack tubing string.
8. large well workover well-completing process according to claim 7, is characterized in that, also comprise step under described step after gravel:
Well-flushing is until clear water is shown in water outlet repeatedly.
9. large well workover well-completing process according to claim 1, is characterized in that, also comprise step under described step after gravel:
Inject the organic plugging thing of the hole of high-temp liquid thawing or dissolving screen casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410725026.2A CN104632130A (en) | 2014-12-03 | 2014-12-03 | Workover well completion process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410725026.2A CN104632130A (en) | 2014-12-03 | 2014-12-03 | Workover well completion process |
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| CN104632130A true CN104632130A (en) | 2015-05-20 |
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| CN201410725026.2A Pending CN104632130A (en) | 2014-12-03 | 2014-12-03 | Workover well completion process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761590A (en) * | 2015-11-24 | 2017-05-31 | 中国石油化工股份有限公司 | Many slug high compact filling anti-sand processes |
| CN110984924A (en) * | 2019-12-20 | 2020-04-10 | 新疆恒智伟业石油工程技术开发有限公司 | Easy-drilling-and-grinding open hole well completion pipe string construction method |
| CN112360368A (en) * | 2020-10-13 | 2021-02-12 | 中国石油天然气股份有限公司 | Oil well water plugging method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761590A (en) * | 2015-11-24 | 2017-05-31 | 中国石油化工股份有限公司 | Many slug high compact filling anti-sand processes |
| CN110984924A (en) * | 2019-12-20 | 2020-04-10 | 新疆恒智伟业石油工程技术开发有限公司 | Easy-drilling-and-grinding open hole well completion pipe string construction method |
| CN110984924B (en) * | 2019-12-20 | 2021-08-24 | 新疆恒智伟业石油工程技术开发有限公司 | Easy-drilling-and-grinding open hole well completion pipe string construction method |
| CN112360368A (en) * | 2020-10-13 | 2021-02-12 | 中国石油天然气股份有限公司 | Oil well water plugging method |
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