CN102559162A - Leakage-proof type temporary blockage additive for low-pressure thin oil well - Google Patents
Leakage-proof type temporary blockage additive for low-pressure thin oil well Download PDFInfo
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- CN102559162A CN102559162A CN2010105861850A CN201010586185A CN102559162A CN 102559162 A CN102559162 A CN 102559162A CN 2010105861850 A CN2010105861850 A CN 2010105861850A CN 201010586185 A CN201010586185 A CN 201010586185A CN 102559162 A CN102559162 A CN 102559162A
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- oil well
- temporary blockage
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- thin oil
- leakage
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Abstract
The invention discloses a leakage-proof type temporary blockage additive for a low-pressure thin oil well, which belongs to the field of workover treatment for a thin oil well in petroleum industry. The temporary blockage additive comprise the following raw materials in weight percentage: 0.4-0.6% of hydroxypropyl guar gum, 0.2-0.4% of organic titanium, 5-10% of petroleum resin, 0.3-0.5% of dodecyl dimethyl betaine, 0.1% of sodium sulfite, 0.02-0.04% of ammonium persulfate and 88.5-93.5% of water. The leakage-proof type temporary blockage additive of the invention crosslinks the hydroxypropyl guar gum with the organic titanium to form a gel system, and at the same time adds a certain amount of petroleum resin to form a compound temporary blockage system. The temporary blockage system can immediately break gel without blocking off the oil well, and avoids the accident of stuck pump caused by broken gel fragment. In addition, the leakage-proof type temporary blockage additive has the advantages of no pollution, no harm to a reservoir and low cost.
Description
Technical field
The present invention relates to petroleum industry thin oil well workover treatment field, the Anti-leakage type temporary plugging agent that particularly a kind of low pressure thin oil well uses.
Background technology
In low pressure thin oil well mining operations; Because long-term exploitation, can there be deficit to a certain degree in the stratum, thereby in operation and washing well process; Well control fluid, flushing fluid can get into reservoir in a large number, so serious problem usually can occur missing in the low pressure thin oil well mining operations.After well control fluid, flushing fluid get into reservoir, be prone to make the clay mineral hydration swelling, cause the reservoir water sensitive damage, cause reservoir permeability to descend, cause the discharge opeing difficulty, thereby need carry out stifled temporarily before well workover treatment of low pressure thin oil and the well-flushing.
At present, the temporary plugging agent that uses in the workover treatment process is mainly two types, and one type is the temporary plugging agent of polyacrylamide gel system type, and this type temporary plugging agent has stronger sealing characteristics, has the better reducing fluid loss effect, in oil well repairing operation, uses more extensive; Another kind of is that oil dissolves the type temporary plugging agent, after this type temporary plugging agent shutoff, under reservoir temperature, can be automatically terminated shutoff by the oil dissolving, is a kind of free of contamination temporary plugging agent.
In realizing process of the present invention, the contriver finds that there is following problem at least in prior art: the temporary plugging agent of polyacrylamide gel system type is difficult for degraded, destroys, in the thin oil well operations; Very easily damage the stratum; Cause permeability plugging, cause the production fluid amount to reduce, even well is blocked; And polyacrylamide gel is sheared very easily holddown of fragment, influences the ordinary production of oil well; Oil dissolves that type temporary plugging agent price is more expensive, and consumption Da Yi is dead admittedly with well, and consumption is little, does not have stifled temporarily effect, and the field conduct difficulty is bigger, only limits in debt not quite on the stratum, and uses in the LOW PERMEABILITY RESERVOIR.
Summary of the invention
The purpose of the embodiment of the invention is the defective to above-mentioned prior art, a kind of low pressure thin oil well Anti-leakage type temporary plugging agent is provided, through hydroxypropylguar gum and organic titanium are cross-linked to form gelling system; Add a certain amount of petroleum resin simultaneously and form compound temporarily stifled system; Should temporarily stifled system can break glue immediately, and can oil well not blocked, and broken glue fragment can not cause the holddown accident; Have simultaneously pollution-free, reservoir is not had injury, advantage with low cost.
The technical scheme taked of the present invention is to achieve these goals:
A kind of low pressure thin oil well Anti-leakage type temporary plugging agent, raw materials used by following weight percent proportioning: hydroxypropylguar gum 0.4-0.6%, organic titanium 0.2-0.4%, petroleum resin 5-10%, Varion CDG-K 0.3-0.5%, S-WAT 0.1%, ammonium persulphate 0.02-0.04% and water 88.5-93.5%.
Said hydroxypropylguar gum is selected first grade or seconds for use.
Said petroleum resin are selected for use No. 6 or No. 9.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: through hydroxypropylguar gum and organic titanium are cross-linked to form gelling system; Add a certain amount of petroleum resin simultaneously and form compound temporarily stifled system, said gelling system belongs to non-rigid structure, is prone to destroyed by bacterium and ammonium persulphate; Petroleum resin are prone to dissolved by thin oil; Thereby should temporarily stifled system can break glue immediately, can oil well not blocked, and broken glue fragment can not cause the holddown accident; Have simultaneously pollution-free, reservoir is not had injury, advantage with low cost.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
Embodiment 1
Present embodiment provides a kind of low pressure thin oil well Anti-leakage type temporary plugging agent.
The temporary plugging agent composition of raw materials:
Hydroxypropylguar gum 0.04-0.06 ton, organic titanium 0.02-0.04 ton, petroleum resin 0.5-1 ton, Varion CDG-K 0.03-0.05 ton, 0.01 ton of S-WAT, ammonium persulphate 0.002-0.004 ton and water 8.85-9.35 ton.
The effect of staple is following in the low pressure thin oil well Anti-leakage type temporary plugging agent that present embodiment provides:
Hydroxypropylguar gum and organic titanium are cross-linked to form gelling system, and the embodiment of the invention selects for use hydroxypropylguar gum to be because compare with other plant glue, like sesbania gum; Hydroxypropylguar gum and organic titanium are crosslinked more thorough; And crosslinking reaction can reach rapidly fully, thereby said gelling system gelation time is shorter, is generally 30min; Can satisfy the site operation needs, and gelation time can pass through the crosslinked concentration adjustment of organic titanium; Become the glue temperature to be about 50 ℃, when system temperature reached 50 ℃, it is the strongest that gel reaches; The sealing ratiod of said gelling system is not less than 95%, and said gelling system is shutoff immediate vicinity of wellbore reservoir pore space effectively.
Petroleum resin have oil soluble ability preferably, play a supportive role at the low pressure thin oil well Anti-leakage type temporary plugging agent PetroChina Company Limited. resin particle that present embodiment provides, and make said temporary plugging agent ultimate compression strength higher, and; Under reservoir temperature, because the existence of said gelling system is arranged, resin is arranged in the gel, gel is arranged in the resin; Behind the broken glue of gel, can form the duct, thin oil flows out with the duct; Flow out the thin oil dissolving resin, increase the duct, thereby remove shutoff; Petroleum resin can be not dead admittedly with well, and petroleum resin can be dissolved by thin oil, and automatically terminate the shutoff of petroleum resin to reservoir; Petroleum resin are other oil soluble polymers relatively, and softening temperature is higher, and generally greater than 60 ℃, intensity is bigger for the petroleum resin softening temperature, and price is cheaper, more is applicable to temporary plugging agent; Petroleum resin and the effective shutoff of said gelling system bound energy immediate vicinity of wellbore reservoir macropore during for low pressure thin oil well operations and the operation of well-flushing wax removal, prevent that well control fluid, lost circulation stratum from providing stifled temporarily preferably effect.
The Varion CDG-K that adds in the said temporary plugging agent plays the effect of coupling agent; Varion CDG-K can be adsorbed on the petroleum resin surface; Wet by the wet water that is reversed to of oil in its surface; Thereby guarantee that petroleum resin and said gelling system have better interface compatibility, can strengthen the bearing capacity of said temporarily stifled system.
After adding said S-WAT in the said temporary plugging agent, the anti-shear ability of heatproof significantly improves, at 80 ℃ of temperature, shearing rate 170s
-1Down, the anti-shear ability of heatproof was brought up to more than 2 hours by 50 minutes.
Said gelling system can constantly break glue under the effect of ammonium persulphate, the broken usually glue time is 4h, and the broken glue time can be regulated through the consumption of regulating ammonium sulfate according to reservoir temperature; If the broken glue time needs 2-3 days; Do not add ammonium persulphate in the system, rely on the shaft bottom bacterium can break glue fully, said gelling system has the effect of instant broken glue; Shorten the discharge opeing phase, recovered oil well productivity rapidly.
During low pressure thin oil well Anti-leakage type temporary plugging agent rig-site utilization that present embodiment provides; Earlier hydroxypropylguar gum 0.04-0.06 ton, petroleum resin 0.5-1 ton, Varion CDG-K 0.03-0.05 ton, 0.01 ton of S-WAT, ammonium persulphate 0.002-0.004 ton and water 8.85-9.35 ton are mixed with compound base fluid system; Add 0.02-0.04 ton organic titanium cross-linking agent when implementing at the scene and can pump at the bottom of the band well in operation, then implement operation.
The low pressure thin oil well Anti-leakage type temporary plugging agent that present embodiment provides is through being cross-linked to form gelling system with hydroxypropylguar gum and organic titanium; Add a certain amount of petroleum resin simultaneously and form compound temporarily stifled system, said gelling system belongs to non-rigid structure, is prone to destroyed by bacterium and ammonium persulphate; Petroleum resin are prone to dissolved by thin oil; Thereby should temporarily stifled system can break glue immediately, can oil well not blocked, and broken glue fragment can not cause the holddown accident; Have simultaneously pollution-free, reservoir is not had injury, advantage with low cost.
In order to make hydroxypropylguar gum and organic titanium crosslinked more thorough, hydroxypropylguar gum is selected first grade or seconds for use; Because No. 6 or 9 tree oil fatty oils dissolve rate all greater than 95%, can better guarantee broken that the glue time short, the petroleum resin of present embodiment use are No. 6 or No. 9 petroleum resin; The content that ammonium persulphate, Varion CDG-K, S-WAT are purchase in the present embodiment is not less than 90% finished product.
Embodiment 2
The temporary plugging agent composition of raw materials:
44.25 tons in 0.2 ton of hydroxypropylguar gum, 0.1 ton of organic titanium, 2.5 tons of petroleum resin, 0.15 ton of Varion CDG-K, 0.05 ton of S-WAT, 0.01 ton of ammonium persulphate and water.
There are 6 gas-bearing formations 10-4 well present productive zone position in Hainan, and rate of permeation is all 1000 * 10
-3μ m
2More than, principal permeability is 3028.1 * 10
-3μ m
2, well-flushing time leakage in the past is very serious, loses basically when heat is washed and returns liquid, and well-flushing finishes the back casing pressure still for negative; During the operation well-flushing, once well-flushing 10 cars 150 sides loseed and returned liquid.On June 4th, 2009, it was stifled temporarily to use said temporary plugging agent to carry out, and clamp-ons temporary plugging agent 45 sides, replaces with clear water then, and pressure plays 2.0MPa, begins normal well-flushing, and heat is washed 50 sides, returns liquid 50 sides.After the operation, only three days discharge opeing phase, the oil well preceding output that all resumes operation, and occur broken glue fragment holddown accident after the operation, do not use said temporary plugging agent before, after the operation, the discharge opeing phase all about one month, has a strong impact on oil well output.
Embodiment 3
The temporary plugging agent composition of raw materials:
45 tons in 0.24 ton of hydroxypropylguar gum, 0.12 ton of organic titanium, 3 tons of petroleum resin, 0.18 ton of Varion CDG-K, 0.048 ton of S-WAT, 0.012 ton of ammonium persulphate and water.
Hainan 19-9 well is well-flushing 30 cars when the end of the year 2008 overhauls, and totally 450 sides do not return liquid, before sand washing operation on October 12 in 2009; It is stifled temporarily to use said temporary plugging agent to carry out, and clamp-ons temporary plugging agent 50 sides, and pressure plays 6.0MPa; Reach the requirement of sand washing pressure, after operation finished, this well array liquid was seen oil after 3 days; Discharge opeing has finished just to reach in back 2 days the production level before the operation, and this well production status is good at present.Broken glue fragment holddown accident appears after the operation, do not use said temporary plugging agent before, can't carry out normal sand washing operation, the discharge opeing phase all about one month, has a strong impact on oil well output.
Embodiment 4
The temporary plugging agent composition of raw materials:
46.75 tons in 0.3 ton of hydroxypropylguar gum, 0.2 ton of organic titanium, 5 tons of petroleum resin, 0.25 ton of Varion CDG-K, 0.05 ton of S-WAT, 0.002 ton of ammonium persulphate and water.
Hainan 25-17 well when the end of the year 2008, heat was washed, well-flushing 3 cars, totally 45 sides do not return liquid; In order to prevent to occur the phenomenon that well-flushing does not return once more, before on September 9th, 2009, heat was washed operation, it was stifled temporarily to use said temporary plugging agent to carry out; Clamp-on temporary plugging agent 45 sides, replace clear water 30 sides to oil reservoir, normal well-flushing circulated after wellhead pressure played 1.0MPa; Wash 40 sides, return 40 sides.After the operation, only three days discharge opeing phase, the oil well preceding output that all resumes operation, and occur broken glue fragment holddown accident after the operation, do not use said temporary plugging agent before, after the operation, the discharge opeing phase all about one month, has a strong impact on oil well output.
This shows that the low pressure thin oil well Anti-leakage type temporary plugging agent that the embodiment of the invention provides is that a kind of to have a sealing characteristics stronger, is prone to degraded, broken immediately glue does not have injury to reservoir, and is pollution-free, and have certain oil-soluble temporary plugging agent.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. low pressure thin oil well Anti-leakage type temporary plugging agent; It is characterized in that, raw materials used by following weight percent proportioning: hydroxypropylguar gum 0.4-0.6%, organic titanium 0.2-0.4%, petroleum resin 5-10%, Varion CDG-K 0.3-0.5%, S-WAT 0.1%, ammonium persulphate 0.02-0.04% and water 88.5-93.5%.
2. low pressure thin oil well Anti-leakage type temporary plugging agent according to claim 1 is characterized in that said hydroxypropylguar gum is selected first grade or seconds for use.
3. low pressure thin oil well Anti-leakage type temporary plugging agent according to claim 1 is characterized in that said petroleum resin are selected for use No. 6 or No. 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010586185.0A CN102559162B (en) | 2010-12-08 | 2010-12-08 | Leakage-proof type temporary blockage additive for low-pressure thin oil well |
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| CN201010586185.0A CN102559162B (en) | 2010-12-08 | 2010-12-08 | Leakage-proof type temporary blockage additive for low-pressure thin oil well |
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| CN102559162B CN102559162B (en) | 2014-11-26 |
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| CN103045212A (en) * | 2013-01-07 | 2013-04-17 | 中国海洋石油总公司 | Microcapsule guar gum and preparation method thereof |
| CN104357033A (en) * | 2014-11-05 | 2015-02-18 | 成都理工大学 | Plugging agent synergist, gel containing same as well as preparation method and application of gel |
| CN104449645A (en) * | 2014-11-19 | 2015-03-25 | 中国科学院化学研究所 | Thermally stable guar gum aqueous solution and preparation method and application thereof |
| CN107619659A (en) * | 2016-07-13 | 2018-01-23 | 中国石油天然气股份有限公司 | Low solid phase oil-soluble temporarily blocks up type workover fluid and its preparation method and application |
| CN108040483A (en) * | 2015-06-25 | 2018-05-15 | 全球有机能源股份有限公司 | Reservoir processing |
| CN108795400A (en) * | 2018-06-22 | 2018-11-13 | 中国石油天然气股份有限公司 | A kind of high temperature temporary plugging ball and its preparation method and application |
| CN109321220A (en) * | 2018-10-17 | 2019-02-12 | 中国石油天然气股份有限公司 | Water injection well fixed tubular column water injectivity profile modification blocking agent and water injectivity profile modification technique |
| CN110484226A (en) * | 2018-05-15 | 2019-11-22 | 中国石油天然气股份有限公司 | Kill-job diverting agent and preparation method thereof |
| CN114907824A (en) * | 2021-02-09 | 2022-08-16 | 中国石油化工股份有限公司 | Phase permeation regulator, preparation method and application thereof |
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| CN103045212B (en) * | 2013-01-07 | 2015-08-19 | 中国海洋石油总公司 | A kind of Microcapsule guar gum and preparation method thereof |
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| CN104357033A (en) * | 2014-11-05 | 2015-02-18 | 成都理工大学 | Plugging agent synergist, gel containing same as well as preparation method and application of gel |
| CN104357033B (en) * | 2014-11-05 | 2017-03-29 | 成都理工大学 | Blocking agent synergist, the gel containing the blocking agent synergist and preparation method and application |
| CN104449645A (en) * | 2014-11-19 | 2015-03-25 | 中国科学院化学研究所 | Thermally stable guar gum aqueous solution and preparation method and application thereof |
| CN104449645B (en) * | 2014-11-19 | 2017-08-25 | 中国科学院化学研究所 | Heat-staple aqueous guar glue solution and its preparation method and application |
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| CN108040483A (en) * | 2015-06-25 | 2018-05-15 | 全球有机能源股份有限公司 | Reservoir processing |
| CN107619659A (en) * | 2016-07-13 | 2018-01-23 | 中国石油天然气股份有限公司 | Low solid phase oil-soluble temporarily blocks up type workover fluid and its preparation method and application |
| CN110484226A (en) * | 2018-05-15 | 2019-11-22 | 中国石油天然气股份有限公司 | Kill-job diverting agent and preparation method thereof |
| CN108795400B (en) * | 2018-06-22 | 2020-10-09 | 中国石油天然气股份有限公司 | High-temperature temporary plugging ball and preparation method and application thereof |
| CN108795400A (en) * | 2018-06-22 | 2018-11-13 | 中国石油天然气股份有限公司 | A kind of high temperature temporary plugging ball and its preparation method and application |
| CN109321220A (en) * | 2018-10-17 | 2019-02-12 | 中国石油天然气股份有限公司 | Water injection well fixed tubular column water injectivity profile modification blocking agent and water injectivity profile modification technique |
| CN114907824A (en) * | 2021-02-09 | 2022-08-16 | 中国石油化工股份有限公司 | Phase permeation regulator, preparation method and application thereof |
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| CN102559162B (en) | 2014-11-26 |
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