CN104533340A - High-pressure-bearing temporary plugging method - Google Patents
High-pressure-bearing temporary plugging method Download PDFInfo
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- CN104533340A CN104533340A CN201410758369.9A CN201410758369A CN104533340A CN 104533340 A CN104533340 A CN 104533340A CN 201410758369 A CN201410758369 A CN 201410758369A CN 104533340 A CN104533340 A CN 104533340A
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Abstract
The invention provides a high-pressure-bearing temporary plugging method which is characterized by including the steps: firstly, preparing a high-pressure-bearing temporary plugging agent; secondly, preparing high-pressure-bearing temporary plugging separation liquid. 100 parts of water, 3-5 parts of bentonite, 0.3-0.5 part of xanthan gum, 70-110 parts of slag type gelling agents, 3-6 parts of filling agents, 3-5 parts of retarder and 10-200 parts of barite powder are placed into a first slurry tank and mixed for 30-60min to form the high-pressure-bearing temporary plugging agent, and 100 parts of water and 0.3-0.5 part of xanthan gum are placed into a second slurry tank and mixed for 10-20min to form the high-pressure-bearing temporary plugging separation liquid. The high-pressure-bearing temporary plugging agent is simple in formula, low in cost and convenient to operate, curing time can be adjusted and controlled as needed, the risk of blocking a drill by cement grouting is avoided, the high-pressure-bearing temporary plugging method is simple in construction, on-site pumping requirements are met, the risk of blocking the drill of a pouring plug and a drilling plug is omitted, and the method can be widely applied to petroleum and natural gas drilling wells.
Description
Technical field
The present invention relates to obstruction method, be specifically related to high pressure-bearing temporary blocking method.
Background technology
The temporary deblocking technology of high pressure-bearing, relates to the plugging operations before the well cementing operation in oil, gas drilling or stifled operation temporarily.In oil, gas drilling process, part deep-well after drilling liner cementing, the complete target zone of subdrilling, and then carry out tie-back casing well cementation.During tie-back cementing there is Open-Hole Section in bottom, and reservoir pressure coefficient is low, easily leakage occurs during cementing well, affects cementing quality, thus add well cementation difficulty.
In order to ensure cementing quality, at tail pipe horn mouth with segment length 100-150m cement plug of betting, to realize the temporary transient shutoff to bore hole.Use the bit drills boiling water bod after tie-back cementing completes again, carry out lower step operation.The Water-injection clay plug process time is long, generally needs 2-3 days; Cost is high, calculates, reach 10-15 ten thousand yuan by 50,000/day of running cost; Note plug, brill fork clip bore and have a big risk.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of high pressure-bearing temporary blocking method.
In order to solve the problem, according to technical scheme of the present invention, high pressure-bearing temporary blocking method, is characterized in: comprise the following steps:
The first step, prepare high pressure-bearing diverting agent: put in the first slurry tank
Stir 30 ~ 60min, obtain high pressure-bearing diverting agent;
Second step, prepare high pressure-bearing stifled insulating liquid temporarily: put in the second slurry tank
100 parts, water
Xanthans 0.3 ~ 0.5 part
Stir 10 ~ 20min, obtain high pressure-bearing stifled insulating liquid temporarily;
3rd step, by drilling tool down to the above 200m of tail pipe pipe shoe, arrive the well section estimating to be formed stifled slug temporarily, before well cementation first with slush pump by the high pressure-bearing in the second slurry tank temporarily stifled insulating liquid to look straight from drilling tool and be pumped in well, the amount of pumping into is: m1=ρ 1 × v1=ρ 1 × s × h1;
M1 is the amount of pumping into, and ρ 1 is high pressure-bearing stifled insulating liquid density temporarily, and v1 is packing volume; S is the well section floor space of blocking up slug temporarily, and h1 is packed height; H1 gets 50 meters to 100 meters;
4th step, being looked straight from drilling tool by the high pressure-bearing diverting agent in the first slurry tank with slush pump is pumped in well; The amount of pumping into is: m2=ρ 2 × v2=ρ 2 × s × h2;
M2 is the amount of pumping into, and ρ 2 is high pressure-bearing diverting agent density, and v2 is packing volume; H2 is packed height; H2 gets 200 meters to 300 meters;
5th step, again with slush pump by the high pressure-bearing in the second slurry tank temporarily stifled insulating liquid to look straight from drilling tool and be pumped in well, the amount of pumping into is: m3=ρ 1 × v3=ρ 1 × s × h3;
M3 is the amount of pumping into, and v3 is packing volume; H3 is packed height; H3 gets 50 meters to 100 meters;
6th step, drilling tool tripped out and estimates to be formed stifled slug top more than 100m temporarily; Wait solidifying 2 ~ 5 days.
The beneficial effect of high pressure-bearing temporary blocking method of the present invention is: high pressure-bearing diverting agent formula of the present invention is simple, and cost is low, and hardening time can regulate as required, realizes hardening time controlled, easy to operate; Avoid cementing plug bit freezing risk, reduce making a trip needed for cementing plug, avoid drilling out, be conducive to the activity duration shortening conventional tie-back cementing cementing plug packing Open-Hole Section, high pressure-bearing temporary blocking method constructing operation is simple, meets site pumping requirement, and note plug, brill plug are without bit freezing risk; Can be widely used in oil, gas drilling.
Detailed description of the invention
1. embodiment 1: high pressure-bearing temporary blocking method, comprises the following steps:
The first step, prepare high pressure-bearing diverting agent: in the first slurry tank, put into 100 parts of water, 3 parts of swell soils, 0.3 part of xanthans, 3 parts of retarding agent, 70 parts of slag class gelling agents, 3 parts of fillers and 100 parts of blanc fixes; Stir 30 ~ 60min, obtain high pressure-bearing diverting agent; The density of high pressure-bearing diverting agent is 1.4 ~ 1.9g/cm3, and temperature applicable range is 70 DEG C ~ 130 DEG C.
Second step, prepare high pressure-bearing stifled insulating liquid temporarily: in the second slurry tank, put into 100 parts, water and xanthans 0.3 part, stir 10 ~ 20min, obtain high pressure-bearing stifled insulating liquid temporarily;
3rd step, by drilling tool down to the above 200m of tail pipe pipe shoe, arrive the well section estimating to be formed stifled slug temporarily, before well cementation first with slush pump by the high pressure-bearing in the second slurry tank temporarily stifled insulating liquid to look straight from drilling tool and be pumped in well, the amount of pumping into is: m1=ρ 1 × v1=ρ 1 × s × h1;
M1 is the amount of pumping into, and ρ 1 is high pressure-bearing stifled insulating liquid density temporarily, and v1 is packing volume; S is the well section floor space of blocking up slug temporarily, and h1 is packed height; H1 gets 50 meters to 100 meters;
4th step, being looked straight from drilling tool by the high pressure-bearing diverting agent in the first slurry tank with slush pump is pumped in well; The amount of pumping into is: m2=ρ 2 × v2=ρ 2 × s × h2;
M2 is the amount of pumping into, and ρ 2 is high pressure-bearing diverting agent density, and v2 is packing volume; H2 is packed height; H2 gets 200 meters to 300 meters;
5th step, again with slush pump by the high pressure-bearing in the second slurry tank temporarily stifled insulating liquid to look straight from drilling tool and be pumped in well, the amount of pumping into is: m3=ρ 1 × v3=ρ 1 × s × h3;
M3 is the amount of pumping into, and v3 is packing volume; H3 is packed height; H3 gets 50 meters to 100 meters;
6th step, drilling tool tripped out and estimates to be formed stifled slug top more than 100m temporarily; Wait solidifying 2 ~ 5 days.
Solidify the intensity that slug is blocked up in rear test temporarily, reach more than pressure-bearing 60MPa, meet cementing requirements.
Embodiment 2: divided by lower outside, all the other are identical with embodiment 1:
The first step, prepare high pressure-bearing diverting agent: in the first slurry tank, put into 100 parts of water, 5 parts of swell soils, 0.5 part of xanthans, 5 parts of retarding agent, 110 parts of slag class gelling agents, 6 parts of fillers and 200 parts of blanc fixes, add in slurry tank, stir 40min, obtain high pressure-bearing diverting agent; The density of high pressure-bearing diverting agent is 1.4 ~ 1.9g/cm3, and temperature applicable range is 70 DEG C ~ 130 DEG C.
Second step, prepare high pressure-bearing stifled insulating liquid temporarily: in the second slurry tank, put into 100 parts, water and xanthans 0.4 part, stir 10 ~ 20min, obtain high pressure-bearing stifled insulating liquid temporarily.
Solidify the intensity that slug is blocked up in rear test temporarily, reach more than pressure-bearing 60MPa, meet cementing requirements.
Embodiment 3: divided by lower outside, all the other are identical with embodiment 1:
The first step, prepare high pressure-bearing diverting agent: in the first slurry tank, put into 100 parts of water, 5 parts of swell soils, 0.4 part of xanthans, 4 parts of retarding agent, 100 parts of slag class gelling agents, 5 parts of fillers and 150 parts of blanc fixes, add in slurry tank, stir 30min, obtain high pressure-bearing diverting agent; The density of high pressure-bearing diverting agent is 1.4 ~ 1.9g/cm3, and temperature applicable range is 70 DEG C ~ 130 DEG C.
Second step, prepare high pressure-bearing stifled insulating liquid temporarily: put in the second slurry tank
100 parts, water and xanthans 0.5 part, stir 10 ~ 20min, obtains high pressure-bearing stifled insulating liquid temporarily.
Solidify the intensity that slug is blocked up in rear test temporarily, reach more than pressure-bearing 60MPa, meet cementing requirements.
Embodiment 4:
The first step, prepare high pressure-bearing diverting agent: put into 10000kg water in the first slurry tank, 500kg swell soil, 50kg xanthans, 300kg retarding agent, 10000kg slag class gelling agent, 400kg filler and 10000kg blanc fixe, stir 30min, obtain high pressure-bearing diverting agent; The density of high pressure-bearing diverting agent is 1.4 ~ 1.9g/cm3, and temperature applicable range is 70 DEG C ~ 130 DEG C.
Second step, prepare high pressure-bearing stifled insulating liquid temporarily: in the second slurry tank, put into 10000kg water, add 30kg xanthans, stir 10min; Obtain high pressure-bearing stifled insulating liquid temporarily;
3rd step, by drilling tool down to the above 200m of tail pipe pipe shoe, arrive the well section estimating to be formed stifled slug temporarily, before well cementation first with slush pump by the high pressure-bearing in the second slurry tank temporarily stifled insulating liquid to look straight from drilling tool and be pumped in well, the design formulas of the amount of pumping into is: m1=ρ 1 × v1=ρ 1 × s × h1; M1 is the amount of pumping into, and ρ 1 is high pressure-bearing stifled insulating liquid density temporarily, and v1 is packing volume; S is the well section floor space of blocking up slug temporarily, and h1 is packed height;
H1 gets 50 meters to 100 meters; The amount of pumping into is 1000 ~ 2000kg;
4th step, being looked straight from drilling tool by the high pressure-bearing diverting agent in the first slurry tank with slush pump is pumped in well; The amount of pumping into is: m2=ρ 2 × v2=ρ 2 × s × h2;
M2 is the amount of pumping into, and ρ 2 is high pressure-bearing diverting agent density, and v2 is packing volume; H2 is packed height; H2 gets 200 meters to 300 meters; The amount of pumping into is 4000 ~ 6000kg;
5th step, again with slush pump by the high pressure-bearing in the second slurry tank temporarily stifled insulating liquid to look straight from drilling tool and be pumped in well, the amount of pumping into is: m3=ρ 1 × v3=ρ 1 × s × h3;
M3 is the amount of pumping into, and v3 is packing volume; H3 is packed height; H3 gets 50 meters to 100 meters; The amount of pumping into is 1000 ~ 2000kg;
6th step, drilling tool tripped out and estimates to be formed stifled slug top more than 100m temporarily; Wait solidifying 2 ~ 5 days.
Solidify the intensity that slug is blocked up in rear test temporarily, reach more than pressure-bearing 60MPa, meet cementing requirements.
Embodiment 5: divided by lower outside, all the other are identical with embodiment 4:
The first step, prepare high pressure-bearing diverting agent: put into 10000kg water in the first slurry tank, 500kg swell soil, 30kg xanthans, 400kg retarding agent, 11000kg slag class gelling agent, 300kg filler and 20000kg blanc fixe, stir 40min, obtain high pressure-bearing diverting agent; The density of this high pressure-bearing diverting agent is 1.4 ~ 1.9g/cm3, and temperature applicable range is 70 DEG C ~ 130 DEG C.
Second step, prepare high pressure-bearing stifled insulating liquid temporarily: in the second slurry tank, put into 10000kg water, add 50kg xanthans, stir 15min, obtain high pressure-bearing stifled insulating liquid temporarily.
Solidify the intensity that slug is blocked up in rear test temporarily, reach more than pressure-bearing 60MPa, meet cementing requirements.
In embodiment 1 ~ 5, the quality index of blanc fixe is density >=4.2g/cm3; Adopt the blanc fixe of West China, An County breeze Co., Ltd, the amount of adjustment blanc fixe can regulate the density of high pressure-bearing diverting agent; Swell soil adopts the OCMA swell soil of Weifang, Shandong Shuan Qiang swell soil Co., Ltd; Xanthans adopts XCD (drilling well level) xanthans of the biochemical Co., Ltd in pavilion in Shandong Zibo; Retarding agent adopts the SD21 retarding agent of down-hole Science and Technology Ltd., and the adjustable setting time of adjustment slow setting dosage, retarding agent is many, and setting time is long, and retarding agent is few, and setting time is short.Gelling agent adopts the slag class gelling agent of Chuan Qing drilling institute; Filler is French chalk.
Above the specific embodiment of the present invention is described, but, the scope being not limited only to detailed description of the invention of the present invention's protection.
Claims (1)
1. high pressure-bearing temporary blocking method, is characterized in that: comprise the following steps:
The first step, prepare high pressure-bearing diverting agent: put in the first slurry tank
Stir 30 ~ 60min, obtain high pressure-bearing diverting agent;
Second step, prepare high pressure-bearing stifled insulating liquid temporarily: put in the second slurry tank
100 parts, water
Xanthans 0.3 ~ 0.5 part
Stir 10 ~ 20min, obtain high pressure-bearing stifled insulating liquid temporarily;
3rd step, by drilling tool down to the above 200m of tail pipe pipe shoe, arrive the well section estimating to be formed stifled slug temporarily, before well cementation first with slush pump by the high pressure-bearing in the second slurry tank temporarily stifled insulating liquid to look straight from drilling tool and be pumped in well, the amount of pumping into is: m1=ρ 1 × v1=ρ 1 × s × h1;
M1 is the amount of pumping into, and ρ 1 is high pressure-bearing stifled insulating liquid density temporarily, and v1 is packing volume; S is the well section floor space of blocking up slug temporarily, and h1 is packed height; H1 gets 50 meters to 100 meters; 4th step, being looked straight from drilling tool by the high pressure-bearing diverting agent in the first slurry tank with slush pump is pumped in well; The amount of pumping into is: m2=ρ 2 × v2=ρ 2 × s × h2;
M2 is the amount of pumping into, and ρ 2 is high pressure-bearing diverting agent density, and v2 is packing volume; H2 is packed height; H2 gets 200 meters to 300 meters;
5th step, again with slush pump by the high pressure-bearing in the second slurry tank temporarily stifled insulating liquid to look straight from drilling tool and be pumped in well, the amount of pumping into is: m3=ρ 1 × v3=ρ 1 × s × h3;
M3 is the amount of pumping into, and v3 is packing volume; H3 is packed height; H3 gets 50 meters to 100 meters;
6th step, drilling tool tripped out and estimates to be formed stifled slug top more than 100m temporarily; Wait solidifying 2 ~ 5 days.
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| CN201410758369.9A CN104533340A (en) | 2014-12-10 | 2014-12-10 | High-pressure-bearing temporary plugging method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288578A (en) * | 2017-08-17 | 2017-10-24 | 李建峰 | One kind only takes hot ground hot hole solid hole plugging device and the method for not fetching water |
| CN108410438A (en) * | 2018-04-16 | 2018-08-17 | 中国石油集团川庆钻探工程有限公司 | Drillable brittle gel partition working solution and preparation method thereof |
| CN110805408A (en) * | 2019-05-31 | 2020-02-18 | 大港油田集团有限责任公司 | Profile control process method for water injection well with packer pipe column |
| CN114439414A (en) * | 2020-11-06 | 2022-05-06 | 中国石油化工股份有限公司 | Temporary well plugging process method utilizing automatic thickening plug of drilling fluid |
-
2014
- 2014-12-10 CN CN201410758369.9A patent/CN104533340A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288578A (en) * | 2017-08-17 | 2017-10-24 | 李建峰 | One kind only takes hot ground hot hole solid hole plugging device and the method for not fetching water |
| CN108410438A (en) * | 2018-04-16 | 2018-08-17 | 中国石油集团川庆钻探工程有限公司 | Drillable brittle gel partition working solution and preparation method thereof |
| CN110805408A (en) * | 2019-05-31 | 2020-02-18 | 大港油田集团有限责任公司 | Profile control process method for water injection well with packer pipe column |
| CN110805408B (en) * | 2019-05-31 | 2021-08-31 | 大港油田集团有限责任公司 | Profile control process method for water injection well with packer pipe column |
| CN114439414A (en) * | 2020-11-06 | 2022-05-06 | 中国石油化工股份有限公司 | Temporary well plugging process method utilizing automatic thickening plug of drilling fluid |
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Application publication date: 20150422 |