CN1070937A - Perforation of oil well resin beads plugging agent and method for making thereof - Google Patents
Perforation of oil well resin beads plugging agent and method for making thereof Download PDFInfo
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- CN1070937A CN1070937A CN 92112692 CN92112692A CN1070937A CN 1070937 A CN1070937 A CN 1070937A CN 92112692 CN92112692 CN 92112692 CN 92112692 A CN92112692 A CN 92112692A CN 1070937 A CN1070937 A CN 1070937A
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- oil well
- resin beads
- epoxy
- plugging agent
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Abstract
The present invention relates to perforation of oil well resin beads plugging agent.The Resins, epoxy of allocating tenderizer and solidifying agent into added in the dispersion medium make resin beads, in the injection borehole, height can be permeated the Water Flooding Layer shutoff after this resin beads becomes glue and before solidifying, oil well is returned to normal production.Plugging agent of the present invention is owing to only with embrasure plugging, so can save a large amount of shutoff medicaments, can satisfy the requirement that the big pressure reduction of oil well is produced after the shutoff, construction technology is simple, and is easy to utilize.
Description
The present invention relates to the drilling composition neighborhood, particularly perforation of oil well resin beads plugging agent and method for making thereof.
The oil production of China has 80% crude oil by water filling in oil reservoir and extraction.An oil reservoir often is made up of many oil reservoirs, because infiltrative difference between each oil reservoir is injected water and will be advanced by leaps and bounds along most permeable zone, causes oil well water logging prematurely.For the Oil extraction that makes the lower oil reservoir of rate of permeation is come out, people adopt chemical agent that height is permeated Water Flooding Layer to carry out shutoff, oil well is returned to normal production.
Up to the present, the chemical agent of the shutoff Water Flooding Layer of people's proposition has two types: [1] macromolecular material (as polyacrylamide and derivative thereof) and linking agent form gel in oil reservoir; [2] in oil reservoir, form solid precipitation (adding calcium chloride) with two kinds of chemicalses as water glass.Be characterized in the duct in the oil reservoir being blocked with gel or solid precipitation.Above-mentioned two types method can reach the purpose of water blockoff under certain condition, but the consumption of chemical agent is all more than 1 ton.And [1] type, gel-strength is limited, and when the drawdown pressure of oil well surpassed 4MPa, gel can spue from oil reservoir and water blockoff was lost efficacy; [2] type must separately be injected by two kinds of medicines, and the middle diesel oil that injects is made spacer pad.In injection process, with the expansion of injecting radius, the spacer pad attenuation, second kind of medicament passes spacer pad and meets with first kind of medicament and then chemical reaction could take place, the generation solid precipitation.The complicacy of oil reservoir hole can not fully contact two kinds of medicaments, has only part to contact ponding.Though above-mentioned two kinds of methods are feasible technically, medicine takes all very big (above ten thousand yuan).[1] plants the requirement that can not satisfy the big pressure reduction production of oil well; [2] plants the waste that not only has medicine, and the construction technology complexity, thereby its widespread use is restricted.
U.S. Pat 3842905 is stoppers that injecting cement in oil well is used, and it provides a kind of special tool for injecting cement in oil well.This patent is mainly introduced the structure and the method for making thereof of band relief hole stopper.The stopper shell is plumbous system, and interior filler is Resins, epoxy and lead powder, and Resins, epoxy is not plugging agent only as the binding agent of lead powder.
The objective of the invention is to: a kind of perforation of oil well resin beads plugging agent and method for making thereof are provided, and this plugging agent consumption is few, stop up the intensity height, plugging technology simply is easy to construction.
The present invention seeks to reach like this: the Resins, epoxy that will allocate tenderizer and solidifying agent into adds in the dispersion medium makes resin beads, inject in the borehole after this resin beads becomes glue and before solidifying, the component and the content ratio of said resin beads plugging agent are as follows: Resins, epoxy 100 grams, 15～25 milliliters of dibutyl phthalate (DBP)s, 20～35 milliliters of quadrols, 0.8～1.2(weight) aqueous solution of % polyacrylamide is 0.8～1.5 kilogram, stop up perforation of oil well with this resin beads plugging agent, just can reach purpose of the present invention.
The present invention is described in detail below in conjunction with accompanying drawing.
Accompanying drawing 1 is the perforation of oil well synoptic diagram, and accompanying drawing 2 is stifled borehole simulation test figure, and accompanying drawing 3 is structure of oil well and stifled borehole construction synoptic diagram.
Perforation of oil well is to penetrate the eyelet of wearing formation with the cement of high energy perforating bullet metal sleeve and fixed sleeving, and it is to dredge body is flowed to oil well by oil reservoir venturi.In accompanying drawing 1,1 represents sleeve pipe, and 2 is cement, and the 3rd, oil reservoir, the 4th, borehole, the 5th, pit shaft.The resin beads plugging agent starting point is the borehole of shutoff oil well, as long as borehole is firmly blocked, water just can not enter oil well.For satisfy the needs that oil well is produced under 6～7Mpa pressure reduction, the pressure reduction that can bear behind the embrasure plugging should be greater than 8Mpa, and therefore, the perforation of oil well plugging agent selects for use high strength epoxy resin as main raw material.
Resins, epoxy is a kind of heavy-gravity material, after adding an amount of tenderizer (liquid dibutylester) and solidifying agent (liquid quadrol), can form flowability liquid preferably.Utilize not miscible with the water characteristic of Resins, epoxy, it is distributed in the polyacrylamide solution in the mode that stirs, dispersed Resins, epoxy forms the liquid pearl.Through behind the certain hour, under the effect of solidifying agent, progressively crosslinked between molecular resin, the resin of liquid pearl becomes the visco-elasticity bead.Polyacrylamide solution is the dispersion medium that Resins, epoxy is made ball, is again the transport fluid of resin beads being sent to borehole.In injection process, transport fluid enters oil reservoir, and resin beads is filtered and be deposited in the borehole, under pressure, the visco-elasticity bead is compacted, prolongation in time and further solidifying, in borehole, form hard embolism and borehole is blocked, thereby reach the purpose of water blockoff.
In order to make Resins, epoxy that poly-And and sinking not take place in making the ball process, used water is tackify water, promptly is dissolved with 0.8～1.2(weight in water) polyacrylamide of %, make its soltion viscosity reach (4～5) * 10
3Milli handkerchief second, this polyacrylamide solution is called dispersion medium when making bead.
Composition and content ratio about resin beads are as follows: Resins, epoxy 100 gram, 15～25 milliliters of dibutyl phthalate (DBP)s, 20～35 milliliters of quadrols, 0.8～1.2(weight) 0.8～1.5 kilogram of the polyacrylamide solution of %.
Above Resins, epoxy is major ingredient; Dibutyl phthalate (DBP) is a tenderizer, can increase the toughness and the viscosifying power of resin beads; Quadrol is a solidifying agent.
The formation of resin beads needs certain temperature, when being lower than 20 ℃, and the balling-up time oversize (greater than 24 hours), when being higher than 45 ℃, be unfavorable for operation again, and the dispersion medium viscosity degradation, influence the formation of bead, make bulb temperature and be controlled at 30～45 ℃ and be advisable.
The principal element that influences the bead size is the proportioning of resin and dispersion medium, and test-results shows that within the specific limits, the proportioning of resin and dispersion medium is big more, and then the bead particle diameter is also big more.At 35 ℃, dispersion medium viscosity is 4 * 10
3Under the condition of milli handkerchief second, the formed bead particle diameter of different proportionings is as follows:
Dispersion medium (kilogram) Resins, epoxy (kilogram) bead particle diameter (millimeter)
10 0.8 <1
10 1.0 1～2
10 1.2 2～4
10 1.5 4～6
In above proportioning, when promptly dispersion medium was 10 kilograms, Resins, epoxy was 0.8～1,5 kilograms, and the bead particle diameter is＜1 millimeter to 4～6 millimeters, all was suitable for doing the shutoff borehole and used.
About becoming glue and the control of set time.The factor that influences into glue and set time mainly is envrionment temperature and hardener dose.When envrionment temperature one timing, the consumption of solidifying agent is controlled to be made glue and set time.When providing 35 ℃ below, one-tenth glue and set time under the different hardener doses:
Resins, epoxy g dibutylester ml quadrol ml gelation time h h set time
100 20 20 10 48
100 20 25 8 32
100 20 30 7 14
100 20 35 6 9
Annotate: 1. gelation time-self cure agent is added to resin is begun to form the viscoelastic micelle by the liquid pearl time; The set time-the self cure agent is added to the time that resin is solid particulate.
Resin beads will be after becoming glue and before solidifying during this period of time in the injection borehole.Inject too early, resin has flowability can clamp-on oil reservoir, can not form embolism at the borehole place; Inject too late, resin becomes solid particulate, loses viscosifying power, can not form embolism in borehole.
Method for making about resin beads of the present invention is as follows:
1) press consumption preparation polyacrylamide solution, its concentration is 0.8～1.2(weight) %, viscosity is (4～5) * 10
3Milli handkerchief second;
2) according to the proportioning of time requirement selection Resins, epoxy, dibutyl phthalate (DBP) and the quadrol of constructing, per 100 gram Resins, epoxy are allocated 15～25 milliliters of dibutyl phthalate (DBP)s into, and 20～35 milliliters of quadrols make composition epoxy resin;
3) composition epoxy resin for preparing is slowly added in the polyacrylamide solution for preparing that is stirring, it is uniformly dispersed;
4) composition solution for preparing is put into thermostat container (35～45 ℃), the situation of routine observation bead when forming the visco-elasticity bead, can be carried to oil well by polyacrylamide solution and inject.
In order to confirm practicality of the present invention, made stifled borehole simulation test.Perforation of oil well is with the high energy perforating bullet cement of metal sleeve and fixed sleeving to be penetrated the eyelet of wearing formation, is fluid is flowed to oil well by oil reservoir venturi.Accompanying drawing 1 is the perforation of oil well synoptic diagram, wherein, the 1st, sleeve pipe, the 2nd, cement, the 3rd, oil reservoir, the 4th, borehole, the 5th, oil well.According to the structure of above-mentioned oil well, designed stifled borehole simulation test device, as accompanying drawing 2.Wherein, the 11st, the double basin of doing of analog casing, the 12nd, cement, the 13rd, glued quartz sand, as the simulation oil reservoir, the 14th, borehole, 10 * 100 millimeters of Φ, the 15th, transport fluid adds resin beads, the 16th, through the filtering transport fluid of oil reservoir.Simulation borehole 14 is to be 32 millimeters with an internal diameter among the figure, and length is 200 millimeters metal tube, and the glued quartz sand of interior dress replaces oil reservoir, and an end is filled with cement, bores Φ 10 * 100mm hole replacement borehole.Simulation borehole 14 is used screwed connection with analog casing 11, and when pressurization in the analog casing 11 of contain resin beads, resin beads is brought into borehole by liquid, and transport fluid goes out by the simulated oil laminar flow, flows in the container.
About perforation of oil well shutoff operational procedure.Fig. 3 has provided structure of oil well and stifled borehole construction synoptic diagram.Wherein, the 31st, oil pipe, the 32nd, pkr; the 33rd, production mandrel, the 34th, ball-and-seat, the 35th, sleeve pipe; the 36th, borehole, the 37th, sleeve gate, the 38th, oil pipe gate; the 39th, pipeline, the 40th, pump truck, the 41st, push away the band tank truck; the 42nd, water tanker, the 43rd, resin beads storage tube, the 44th, feeder; the 45th, plugged zone, the 46th, oil-yielding stratum (protective layer).
The operational procedure of shutoff borehole is:
1) be lowered to the tubing string of shutoff borehole in the oil well, this tubing string is made up of oil pipe 31, pkr 32, production mandrel 33 and check valve 34;
2) pressurization in the oil pipe 31 makes pkr 32 distendings, and oil casing annular space is shut;
3) fuse in the salvaging production mandrel 33 can make production mandrel be communicated with treating plugged zone;
4) resin beads is packed in the storage tube 43;
5) in oil well, injecting a certain amount of 0.8～1.2(weight with pump truck 40) the % polyacrylamide solution brings resin beads in pipeline, with this solution resin beads delivered to the plugged zone position again.In the whole injection process, liquid enters the stratum, and bead blocks borehole.The 15Mpa that keep-ups pressure, closing well 24 hours treats that the bead compacting solidifies.
6) operating tool string is changed to flow string, oil well changes ordinary production over to.
So plugging agent of the present invention can satisfy the requirement that the big pressure reduction of oil well is produced owing to only embrasure plugging can be saved a large amount of shutoff medicaments after the shutoff, construction technology is simple, makes in popularization.
Claims (2)
1, a kind of perforation of oil well resin beads plugging agent, it is characterized in that: the composition and the content ratio of said plugging agent are as follows: Resins, epoxy 100 grams, 15～25 milliliters of dibutyl phthalates, 20～35 milliliters of quadrols, 0.8～1.5 kilogram of 0.8～1.2 (weight) % polyacrylamide solution.
2, as the manufacture method of the said perforation of oil well resin beads of claim 1 plugging agent, it is characterized in that: a) press consumption preparation polyacrylamide solution, its concentration is 0.8～1.2(weight) %, viscosity is (4～5) * 10
3Milli handkerchief second;
B) according to the proportioning of time requirement selection Resins, epoxy, dibutyl phthalate (DBP) and the quadrol of constructing, per 100 gram Resins, epoxy are allocated 15～25 milliliters of dibutyl phthalate (DBP)s into, and 20～35 milliliters of quadrols make composition epoxy resin;
C) composition epoxy resin for preparing is slowly added in the polyacrylamide solution for preparing that is stirring, it is uniformly dispersed;
D) composition solution for preparing is put into thermostat container (35～45 ℃), the situation of routine observation bead can be injected to oil well when forming the visco-elasticity bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92112692 CN1032367C (en) | 1992-11-04 | 1992-11-04 | Oil well porthole resin small ball sealing agent and its made method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92112692 CN1032367C (en) | 1992-11-04 | 1992-11-04 | Oil well porthole resin small ball sealing agent and its made method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1070937A true CN1070937A (en) | 1993-04-14 |
| CN1032367C CN1032367C (en) | 1996-07-24 |
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ID=4946064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92112692 Expired - Fee Related CN1032367C (en) | 1992-11-04 | 1992-11-04 | Oil well porthole resin small ball sealing agent and its made method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1032367C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055331C (en) * | 1995-02-14 | 2000-08-09 | 史慧生 | Perforation and sand-proof treatment device for oil well |
| CN101749005A (en) * | 2010-03-17 | 2010-06-23 | 新奥气化采煤有限公司 | Protection process of underground drilling hole |
| CN102516963A (en) * | 2011-10-17 | 2012-06-27 | 中国石油天然气股份有限公司 | Chemical composite resin mounting agent for oil-water well casing restoration |
| CN111849439A (en) * | 2019-04-26 | 2020-10-30 | 费尔蒙特山拓有限公司 | Compression-resistant buoyancy spherical plugging agent |
| CN111849441A (en) * | 2020-06-29 | 2020-10-30 | 山东华茂石油技术开发有限公司 | Low-temperature oil layer blast hole plugging agent, preparation method and use method thereof |
| CN113153215A (en) * | 2021-04-23 | 2021-07-23 | 大庆辰平钻井技术服务有限公司 | Chemical plugging method for high-water flooded layer of deflecting section of ultra-short radius horizontal well |
| CN114718502A (en) * | 2021-01-05 | 2022-07-08 | 中国石油天然气股份有限公司 | Abandoned well plugging method |
-
1992
- 1992-11-04 CN CN 92112692 patent/CN1032367C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055331C (en) * | 1995-02-14 | 2000-08-09 | 史慧生 | Perforation and sand-proof treatment device for oil well |
| CN101749005A (en) * | 2010-03-17 | 2010-06-23 | 新奥气化采煤有限公司 | Protection process of underground drilling hole |
| CN102516963A (en) * | 2011-10-17 | 2012-06-27 | 中国石油天然气股份有限公司 | Chemical composite resin mounting agent for oil-water well casing restoration |
| CN102516963B (en) * | 2011-10-17 | 2013-07-31 | 中国石油天然气股份有限公司 | Chemical composite resin mounting agent for oil-water well casing restoration |
| CN111849439A (en) * | 2019-04-26 | 2020-10-30 | 费尔蒙特山拓有限公司 | Compression-resistant buoyancy spherical plugging agent |
| CN111849441A (en) * | 2020-06-29 | 2020-10-30 | 山东华茂石油技术开发有限公司 | Low-temperature oil layer blast hole plugging agent, preparation method and use method thereof |
| CN114718502A (en) * | 2021-01-05 | 2022-07-08 | 中国石油天然气股份有限公司 | Abandoned well plugging method |
| CN114718502B (en) * | 2021-01-05 | 2023-12-22 | 中国石油天然气股份有限公司 | Abandoned well plugging method |
| CN113153215A (en) * | 2021-04-23 | 2021-07-23 | 大庆辰平钻井技术服务有限公司 | Chemical plugging method for high-water flooded layer of deflecting section of ultra-short radius horizontal well |
| CN113153215B (en) * | 2021-04-23 | 2022-11-29 | 大庆辰平钻井技术服务有限公司 | Chemical plugging method for high-water-flooded layer of deflecting section of ultra-short radius horizontal well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1032367C (en) | 1996-07-24 |
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