CN102465680A - Method for stopping leakage by superstrong water absorption resin in carrying manner - Google Patents
Method for stopping leakage by superstrong water absorption resin in carrying manner Download PDFInfo
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- CN102465680A CN102465680A CN2010105586641A CN201010558664A CN102465680A CN 102465680 A CN102465680 A CN 102465680A CN 2010105586641 A CN2010105586641 A CN 2010105586641A CN 201010558664 A CN201010558664 A CN 201010558664A CN 102465680 A CN102465680 A CN 102465680A
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Abstract
The invention discloses a method for stopping leakage by a superstrong water absorption resin in a carrying manner, which comprises the following steps of: mixing the prepared superstrong water absorption resin with a carrying fluid; filling the mixed solution into a leakage layer by a certain filling pressure, and standing for a certain time; filling clean water by a certain filling pressure; and enabling the superstrong water absorption resin to be quickly expanded after absorbing water so as to seal up the leakage layer, and the like. According to the method disclosed by the invention, the delivery of the superstrong water absorption resin is finished by using the carrying fluid, after the delivery is ended, the clean water is filled, so that the superstrong water absorption resin is expanded to stop leakage, thereby avoiding the situations of shaft plugging, pump locking and the like caused due to too fast water absorption and expansion speed of the superstrong water absorption resin; and the superstrong water absorption resin has good leakage stoppage effect, small leakage and a certain pressure bearing capability.
Description
Technical field
The present invention relates to a kind of blocking method that carries of super-strong moisture absorbing resin.
Background technology
Drilling fluid leakage is a kind of common down hole problem in the drillng operation.That leakage can occur in is shallow, in and deep formation, also can in the geochronic stratum of difference, take place, and all possibly occur in the stratum of all kinds of lithology.The leakage that has is that mud pit level slowly descends, and then having into of having do not have, in case miss; Not only incur loss through delay the drillng operation time, prolong drilling period, the loss drilling fluid; The infringement oil-gas Layer is disturbed geological logging work, but also possibly caused a series of complex situations and accidents such as well slough, bit freezing, blowout; Even cause well to be scrapped, cause great economic loss.Therefore, in drillng operation, should avoid the generation of leakage as far as possible.
According to statistics, whole world leakage incidence accounts for 25 20 percent to percent of total well number, and the annual fund that expends because of leakage is up to several hundred million units in the global petroleum industry.All there is the leakage problem to some extent in the most of oil fields of China, and the most outstanding is that Chuan Dong is regional with south, river, and annual leak stopping is consuming time to account for 5～8% of the total drilling time.Also to consume a large amount of drilling fluids and loss circulation material simultaneously, drilling cost is risen significantly.As area, east, a river year loss mud amount is 8000～13000m a few years ago
3, year about 200 wells of generation leakage, 14～35 rig moons of lost time, year is directly consumed 400～6,000,000 yuan.
The leakage problem is drilling well work long-term existence and fails the technical barrier of fine solution that leakage stopping technology is the important topic that drilling engineering circle studies for a long period of time.Leakage stopping technology has had bigger development in recent years, and each oil field has all summed up the leak-stopping technique technology of suitable this area characteristics both at home and abroad, and the kind of loss circulation material is on the increase, and the leak stopping success rate is also improving constantly.
However, because the each department formation lithology changes hole, crack, solution cavity developmental state difference; The reason of leakage is complicated, the leakage type is different; Restraining factors are more, and the specific aim of leakage stopping technology is stronger, are difficult to so far carry out leakproof and leak stopping with a general pattern.It is even more serious particularly to bore fractured reservoir leakage problem.According to incompletely statistics, the reserves of state's internal fissure property bad ground account for 50% of gross reserves, but grow because of formation fracture, hole, and the leakage problem is difficult to solve, the loss that causes and serious.Therefore, the pernicious leakage problem of crack property bad ground has become the emphasis that drilling well circle is paid close attention to.
About the research of super-strong moisture absorbing resin, external starting is morning, and what wherein effect was maximum is the U.S. and Japan, secondly is Germany and French.And decades in evening are wanted in domestic relative research, but in the last few years, relevant technology emerges in an endless stream, and each side all is being devoted to research whole-heartedly.
1961, north research institute of United States Department of Agriculture began from starch-grafted acrylonitrile, and super-strong moisture absorbing resin is studied, and this type of research subsequently is more and more deep, and successfully developed super-strong moisture absorbing resin to the seventies end of the sixties.After this, number of research projects has been carried out to the aspects such as kind, manufacturing approach, performance and application of super-strong moisture absorbing property resin in countries in the world such as Germany, France, has obtained achievement.Begin the eighties to occur producing the water imbibition material through chemical reaction with other natural compound derivatives.
The expansion of and application study synthetic along with super absorbent resin, the also corresponding development of its forming processing technology.Absorbent composites produced in the eighties in 20th century, because it can improve many performances such as intensity of hydrogel after the salt tolerance, absorption speed, suction of super-strong moisture absorbing property resin, so development rapidly.To the beginning of the nineties, advance by leaps and bounds especially.In recent years the blend of water-absorbing resins has begun one's study.These provide wide prospect more for the development super absorbent resin.
The dominant company of world production super absorbent resin in 1985 has only 13 families, to nineteen ninety-five foreign study and the company of production reach nearly 50 families unexpectedly.Japan is maximum in the world super-strong moisture absorbing resin production and research state.Cooperate with other countries such as the U.S., Germany again subsequently, the super-strong moisture absorbing resin technology is rapid growth constantly.
For the super-strong moisture absorbing resin Study on Theory, the 1950's, the suction theory of Flory was established theoretical foundation for the development of absorbent polymer.After the sixties, super-strong moisture absorbing property resin began to go into operation, along with its fast development, People more and more need to feel the further instructive theory of further investigation super-strong moisture absorbing property resin.The end of the seventies, various countries began to pay attention to its research in succession.State such as Japan and the United States particularly, more fruitful theoretical research has been carried out in, hydrating structure theoretical in suction and aspects such as form and macromolecule hydrogel, and new development has been arranged.
The super-strong moisture absorbing resin water imbibition is strong, can absorb the water of tens to several thousand times of own vols, and the ability biodegradation is widely used, and considers it also is a good selection from the global environment factor.Carry liquid and suppress the water absorbent polymer expansion,, make its expansion water filling behind mixture pump such as the drop ply, thus the shutoff lost-circulation zone, and particularly to serious fractured leakage situation, this technology is in aboveground successful Application.Abroad on the super-strong moisture absorbing resin leakage stopping technology, start to walk early, achievement is many, and the correlation technique instance is also a lot.
Super-strong moisture absorbing resin is popularized in the petroleum industry field gradually, and the research that relevant oilfield chemistry is used hydroscopic high-molecular resin has also caused oilfielder's attention.Particularly in the oil gas field probing, be used as the chemical plugging material, chemical plugging is a kind of important techniques measure in the oil gas field drilling process.Development since the eighties has obtained good achievement.At present, the on-the-spot sealing agent of the hydroscopic high-molecular resin class of Application and Development has SYZ, PAT and TP-9010 type brand, JPD imbibition polymer, WS-1 type GEL USED FOR PLUGGING WELL LOST CIRCULATION, WEA-1 delayed expansion particle sealing agent.
In addition, super-strong moisture absorbing resin can be made encapsulant in the defeated construction of oil gas field ground line; In probing, make additive for drilling fluid, can be used as the sliding agent of drill bit and the gel of drilling fluid; Application in other professional domains of oilfield chemistry because of its performance is remarkable, like tertiary oil recovery, is made gel in oil gas field waste water treatment aqueous fracturing fluid, the acid fracturing liquid, the curing compound of well killing fluid etc.
In a word, the development of super-strong moisture absorbing resin is also just in nearly decades.No matter, perhaps, all obtained huge development from the situation of processing and application and theoretical research from the kind and the quantity of product.Because performance that hydroscopic high-molecular resin is peculiar and considerable application prospect; Develop extremely rapid over 30 years; By general application performance, function, to the high-level exploitation development of intelligent multi-function material, its application has been penetrated into all trades and professions of national economy.Particularly be a new application study direction in oilfield chemistry, have a good application prospect.
Because super-strong moisture absorbing resin very easily imbibition in water medium, experiment shows repeatedly: meet the water suction multiple that promptly reaches capacity about 30 minutes.Because imbibition speed is too fast, in actual leak stopping process, the leak stopping slurries are circulated to the chronic of drop ply, want 2 hours at least, water-absorbing resin so just possibly occur and also not get into the situation that the crack passage just has been expanded to the limit, and are totally unfavorable to leak stopping.In addition, because the imbibition excessive velocities will certainly influence the mobile performance of super-strong moisture absorbing resin in injection process, situation such as the pit shaft that very likely results in blockage, the pump of spraining.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art; A kind of blocking method that carries of super-strong moisture absorbing resin is provided, and the conveying of liquid completion to super-strong moisture absorbing resin carried in the blocking method employing of carrying of this super-strong moisture absorbing resin, and clear water reinjects after carrying end; Make super-strong moisture absorbing resin expand and accomplish leak stopping; Thereby stopped owing to super-strong moisture absorbing resin imbibition excessive velocities, the generation of the pit shaft that results in blockage, the situation such as pump of spraining, and have good plugging effect; Its wastage is all very little, and has certain bearing capacity.
The object of the invention is realized through following technical proposals: super-strong moisture absorbing resin carry blocking method, may further comprise the steps:
(a) it is subsequent use to produce super-strong moisture absorbing resin;
(b) with the super-strong moisture absorbing resin of producing with carry liquid and mix:
(c) with certain injection pressure mixed liquor is injected lost-circulation zone, leave standstill a period of time;
(d) inject clear water with certain injection pressure then;
(e) expand rapidly in super-strong moisture absorbing resin suction back, thus the shutoff drop ply.
In the said step (c), injection pressure is 1.5MPa.
In the said step (c), time of repose is 10 minutes.
In the said step (d), injection pressure is 1.0MPa.
In sum, the invention has the beneficial effects as follows: adopt and carry the conveying of liquid completion to super-strong moisture absorbing resin, clear water reinjects after carrying end; Make super-strong moisture absorbing resin expand and accomplish leak stopping; Thereby stopped owing to super-strong moisture absorbing resin imbibition excessive velocities, the generation of the pit shaft that results in blockage, the situation such as pump of spraining, and have good plugging effect; Its wastage is all very little, and has certain bearing capacity.
The specific embodiment
Below in conjunction with embodiment, the present invention is done further detailed description, but embodiment of the present invention is not limited only to this.
Embodiment:
The super-strong moisture absorbing resin that the present invention relates to carry blocking method, its concrete steps are following:
(a) it is subsequent use to produce super-strong moisture absorbing resin;
(b) with the super-strong moisture absorbing resin of producing with carry liquid and mix:
(c) with certain injection pressure mixed liquor is injected lost-circulation zone, leave standstill a period of time;
(d) inject clear water with certain injection pressure then;
(e) expand rapidly in super-strong moisture absorbing resin suction back, thus the shutoff drop ply.
In the said step (c), injection pressure is 1.5MPa.
In the said step (c), time of repose is 10 minutes.
In the said step (d), injection pressure is 1.0MPa.
Because super-strong moisture absorbing resin very easily imbibition in water medium; Imbibition speed is too fast; In actual leak stopping process, the leak stopping slurries are circulated to the chronic of drop ply, want 2 hours at least; Water-absorbing resin so just possibly occur and also not get into the situation that the crack passage just has been expanded to the limit, totally unfavorable to leak stopping.In addition, because the imbibition excessive velocities will certainly influence the mobile performance of super-strong moisture absorbing resin in injection process, situation such as the pit shaft that very likely results in blockage, the pump of spraining.
So; The present invention is in order to ensure the smooth construction of plugging effect and down-hole; Adopt the suitable liquid that carries to carry super-strong moisture absorbing resin to solve the problems referred to above, carry the expansion that liquid suppresses water-absorbing resin, and it is carried into lost-circulation zone; Inject clear water subsequently, make the water-absorbing resin rapid expansion shutoff drop ply that absorbs water.
Said method adopts and carries the conveying of liquid completion to super-strong moisture absorbing resin; The clear water that after carry finishing, reinjects makes super-strong moisture absorbing resin expand and accomplishes leak stopping, thereby stopped because super-strong moisture absorbing resin imbibition excessive velocities; The generation of pit shaft, the situation such as pump of spraining of resulting in blockage; And have good plugging effect, its wastage is all very little, and has certain bearing capacity.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations to above embodiment did all fall within protection scope of the present invention.
Claims (4)
- Super-strong moisture absorbing resin carry blocking method, it is characterized in that, may further comprise the steps:(a) it is subsequent use to produce super-strong moisture absorbing resin;(b) with the super-strong moisture absorbing resin of producing with carry liquid and mix:(c) with certain injection pressure mixed liquor is injected lost-circulation zone, leave standstill a period of time;(d) inject clear water with certain injection pressure then;(e) expand rapidly in super-strong moisture absorbing resin suction back, thus the shutoff drop ply.
- Super-strong moisture absorbing resin according to claim 1 carry blocking method, it is characterized in that in the said step (c), injection pressure is 1.5MPa.
- Super-strong moisture absorbing resin according to claim 1 carry blocking method, it is characterized in that in the said step (c), time of repose is 10 minutes.
- Super-strong moisture absorbing resin according to claim 1 carry blocking method, it is characterized in that in the said step (d), injection pressure is 1.0MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105586641A CN102465680A (en) | 2010-11-18 | 2010-11-18 | Method for stopping leakage by superstrong water absorption resin in carrying manner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105586641A CN102465680A (en) | 2010-11-18 | 2010-11-18 | Method for stopping leakage by superstrong water absorption resin in carrying manner |
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| CN102465680A true CN102465680A (en) | 2012-05-23 |
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| CN2010105586641A Pending CN102465680A (en) | 2010-11-18 | 2010-11-18 | Method for stopping leakage by superstrong water absorption resin in carrying manner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422835A (en) * | 2013-08-19 | 2013-12-04 | 中国石油集团川庆钻探工程有限公司 | Solidifiable flow sand bridge plugging method for shaft of oil and gas well |
| CN104453770A (en) * | 2014-12-04 | 2015-03-25 | 中国石油天然气股份有限公司 | Method of performing selective water plugging in deep part of oil well with waste baby diapers |
| CN104453771A (en) * | 2014-12-04 | 2015-03-25 | 中国石油天然气股份有限公司 | Method for implementing oil well deep part selective water plugging by utilizing waste polystyrene foam plastic |
| CN106928607A (en) * | 2017-02-28 | 2017-07-07 | 江苏伊莱凯美新材料科技有限公司 | A kind of super absorbent resin oil/fat composition that can control water swelling time and its application |
-
2010
- 2010-11-18 CN CN2010105586641A patent/CN102465680A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422835A (en) * | 2013-08-19 | 2013-12-04 | 中国石油集团川庆钻探工程有限公司 | Solidifiable flow sand bridge plugging method for shaft of oil and gas well |
| CN103422835B (en) * | 2013-08-19 | 2016-06-15 | 中国石油集团川庆钻探工程有限公司 | A kind of Oil/gas Well pit shaft curable fluid sand bridge method for blocking |
| CN104453770A (en) * | 2014-12-04 | 2015-03-25 | 中国石油天然气股份有限公司 | Method of performing selective water plugging in deep part of oil well with waste baby diapers |
| CN104453771A (en) * | 2014-12-04 | 2015-03-25 | 中国石油天然气股份有限公司 | Method for implementing oil well deep part selective water plugging by utilizing waste polystyrene foam plastic |
| CN106928607A (en) * | 2017-02-28 | 2017-07-07 | 江苏伊莱凯美新材料科技有限公司 | A kind of super absorbent resin oil/fat composition that can control water swelling time and its application |
| CN106928607B (en) * | 2017-02-28 | 2019-02-01 | 姚国友 | A kind of super absorbent resin oil/fat composition can control water swelling time and its application |
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Application publication date: 20120523 |