CN104453770A - Method of performing selective water plugging in deep part of oil well with waste baby diapers - Google Patents
Method of performing selective water plugging in deep part of oil well with waste baby diapers Download PDFInfo
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- CN104453770A CN104453770A CN201410729022.1A CN201410729022A CN104453770A CN 104453770 A CN104453770 A CN 104453770A CN 201410729022 A CN201410729022 A CN 201410729022A CN 104453770 A CN104453770 A CN 104453770A
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- oil
- blocking agent
- waste
- agent solution
- acetone
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/502—Oil-based compositions
Abstract
The invention relates to a method of performing selective water plugging in a deep part of an oil well with waste baby diapers. The method comprises the following steps: preparing a plugging agent solution : adding resin particles in 10 parts by weight of the waste baby diapers into 5-15 parts by weight of an organic solvent, carrying out stirring at 40-60 DEG C to dissolve the waste baby diapers to obtain a plugging agent solution I; or further adding 10-200 parts by weight of diesel oil, and carrying out stirring for mixing to obtain a plugging agent solution II, wherein the organic solvent is selected from one or more of methylbenzene, dimethylbenzene, methyl acetate, ethyl acetate and acetone; taking thin crude oil and/or diesel oil as a carrier fluid; adding the plugging agent solution (I or II) into the carrier fluid to obtain a plugging agent oil fluid, and squeezing the plugging agent oil fluid into a ground layer from an oil sleeve in an annular manner; jacking the plugging agent oil fluid to the deep part of the ground layer by virtue of a displacing liquid; closing the well for 1-2 days, and normally opening the well to produce. The method disclosed by the invention is used for performing selective water plugging in the deep part of the oil well by virtue of the high water-absorption resin in the waste baby diapers, so that the outlet water can be effectively controlled in a water layer while no pollution and no damages are produced on the oil layer.
Description
Technical field
The present invention relates to a kind of well deep part selective water plugging method, be specifically related to a kind of method utilizing waste and old diaper to implement the selective water plugging of oil reservoir deep, belong to Water in Water Shutoff in Oil Field field.
Background technology
Oilwell water shutoff refers to the output controlling water from oil well, its objective is the production efficiency improving oil well.Chemical water shutoff is exactly on ground to water-yielding stratum injectionization blocking agent, the method for the product reservoir plugging of the physical and chemical reaction utilizing blocking agent and oil reservoir to occur.Oil-soluble resin water-plugging technique utilizes oil-soluble resin to be dissolved in crude oil but meet water to form granulated substance and play the principle of ponding, reaches the object of the stifled oil of water blockoff, has certain selective.About the correlative study of oil-soluble resin water shutoff agent is as follows:
" research of Oil-Soluble Resin Temporary Plugging Agent " (Li Kehua, Zhao Xiutai; western mine locating work; 2001, S1) disclose the important method that use Oil-Soluble Resin Temporary Plugging Agent is a kind of reservoir protec-tion, it utilizes the oil-soluble of resin to reach the object of blocking up temporarily oil-gas Layer." water base oil-soluble blocking agent desk research " (fourth is sharp, Meng Fantao, oilfield chemistry, 2001, 2) employing pitch is disclosed, water base oil-soluble blocking agent prepared by oil-soluble resin and suitable modifier has also carried out Experimental comparison's investigation to its performance, core experiment result shows, the water plugging property of water base oil-soluble blocking agent is better than active viscous crude, more be better than aqueous gel blocking agent, softening point close to or lower than the blocking agent of rock core (stratum) temperature, average diameter of particles can be greater than rock core pore mean diameters, and during higher than rock core (stratum) temperature more than 20 DEG C of softening point, the particle that diameter is less than rock core pore diameter just can enter rock core hole and play plugging action, the softening point of pitch and Petropols can raise owing to adding not easily softening material, also can reduce owing to adding oily substance." research and apply that oil emulsion soluble resin selective blocking is adjusted " (huge Deng Feng, Xie Gang etc., petroleum geology and engineering, 2012,5:119-122) disclose a kind of oil-soluble resin plugging agent, this plugging agent can be miscible with the water of arbitrary proportion, there is good mobility, easy injection stratum, after entering stratum, oil-soluble resin particle produces the space of assembling and being formed shared by dough blocking, or be attached to rock surface, change the wetability of rock surface, form the mechanical blockage to current, realize reducing the object of producing water incremental oil production.
Although prior art utilizes oil-soluble resin can to determine selective blocking water problem by partial solution as blocking agent, but the shortcoming of these existing oil-soluble resin blocking agents is: blocking agent core exists in solid form, oil reservoir deep can not be reached, cannot the selective water plugging of oil reservoir deep be carried out.
On the other hand, paper diaper (pad or sheet) are commonly called as " diaper " has become the third-largest rubbish source being only second to newspaper and food and drink packaging.Diaper material is in the market a class super absorbent resin, mostly cannot biodegradation, according to current landfill disposal mode, on needs, a century could rot, a baby is at association's oneself " crouching toilet " front average needs 3600 wet diapers, under the historical conditions of China baby high birth rate now, it is well imagined the huge pollution that environment brings.The making raw material mainly oil product of diaper, the external chemical method that adopts extracts methane or plastics more from diaper now, from energy consumption angle, can bring secondary pollution to environment.Therefore how utilizing waste and old diaper, turned waste into wealth, reduce environment pollution, is a problem being worth research.
For the super absorbent resin in diaper, pure water or the salt solution of sole mass tens to hundred times can be absorbed, be widely used in agriculture and forestry production, urban landscaping, drought-resistant water-preserving, defend and control sand, and play huge effect; This kind of super absorbent resin also can be applicable to many fields such as health care, oil exploitation, constructional materials, communications and transportation.In addition, owing to can be formed after this kind of super absorbent resin water suction, there is certain viscoelastic gelinite, there is certain intensity and toughness, progressively be applied to oil-gas field development field in recent years, main as water plugging profile control agent, sealing agent (Wang Zhengliang, Wang Xiaojuan, Ding Tao, petroleum gas journal, March the 33rd in 2011 volume the 3rd phase P138).But above-mentioned research, emphasis studies in salt-resistance, temperature impact etc., and valuable product, cannot large-scale promotion application.
Through looking into, and find that application super absorbent resin carries out the technology report of oil reservoir deep selective water plugging.
Summary of the invention
Main purpose of the present invention is to provide a kind of method utilizing the high hydroscopic resin in waste and old diaper to carry out the selective water plugging of oil reservoir deep.
Another object of the present invention is to provide a kind of blocking agent solution for the selective water plugging of oil reservoir deep.
For reaching above-mentioned purpose, the invention provides a kind of method of well deep part selective water plugging, the method mainly utilizes the high hydroscopic resin in waste and old diaper to implement the selective water plugging of oil reservoir deep, high hydroscopic resin in waste and old diaper be mixed with the mixed liquor of organic solvent or comprise the mixed liquor of diesel oil further, then realizing selective water plugging with crude oil and/or diesel oil blending transportation to oil reservoir deep.
Specifically, the invention provides a kind of method of well deep part selective water plugging, the method comprising the steps of:
(1) blocking agent solution is prepared: join in 5 ~ 15 weight parts organic solvent by the resin particle in the waste and old diaper of 10 weight portion, 40 ~ 60 DEG C of stirring and dissolving, obtain blocking agent solution; Or add the diesel oil of 10 ~ 200 weight portions further, be uniformly mixed, obtain blocking agent solution; Wherein said organic solvent be selected from toluene, dimethylbenzene, methyl acetate, ethyl acetate, acetone one or more;
(2) with rare crude oil and/or diesel oil for carrying liquid, blocking agent solution step (1) prepared accounts for the amount of carrying liquid weight 0.8% ~ 2.5% according to the resin particle in wherein waste and old diaper and adds and carry in liquid, obtain blocking agent fluid, and blocking agent fluid is clamp-oned stratum from oil jacket annular space;
(3) with displacement fluid, the blocking agent fluid that step (2) is injected is headed into earth formation deep;
(4) closing well 1 ~ 2 day, normal opening well and making production.
Resin particle in waste and old diaper, main component is super absorbent polymer (Superabsorbentpolymers, be called for short SAP, also super absorbent resin is, super-strong moisture absorbing machine, high water absorbency polymer), that a class can absorb and retain the new functional macromolecule material wanting very large many liquid relative to itself quality, prevailing type is mixed by acrylic acid and NaOH to carry out polymerization to generate Sodium Polyacrylate (sometimes referring to acrylonitrile sodium) under the existence of initator, also other materials is had, such as polyacrylamide analog copolymer, ethene and copolymer-maleic anhydride, cross-linked carboxymethyl cellulose, polyvinyl alcohol copolymer, cross-linked polyethylene oxide and starch-grafted polyacrylonitrile copolymer etc.Mainly make use of the high-hydroscopicity of these materials in waste and old diaper in the present invention, turn waste into wealth, during embody rule, the waste and old diaper of recyclable different brands.
In method of the present invention, adopt the resin particle in waste and old diaper, be mixed with liquid in advance, use crude oil and/or diesel oil (in order to reduce costs again, preferred rare crude oil) be carried into oil reservoir deep, when there being large water gaging, from crude oil and/or diesel oil, separate out imbibition form solid blocking, can the exhalant canal of shutoff for a long time, can not expand at the high hydroscopic resin of oil discharge passage, can along with crude oil output, in output process, meet a large amount of formation water, still can absorb water and form solid blocking, reach the object of selective water plugging.Water-absorbing resins based on blocking, initial stage plugging strength is high, in water can gradually dissolve and ineffective.
According to specific embodiment of the invention scheme, in well deep part selective water plugging method of the present invention, the preferred mixed solvent of wherein said organic solvent, as the benzene mixed of toluene and dimethylbenzene, for reducing costs, this benzene mixed can be directly commercially available; Particularly preferably volume ratio is dimethylbenzene: methyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are toluene: ethyl acetate: the mixed solvent of acetone=2:4:1 and volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=2:4:1, after resin particle in waste and old diaper is dissolved in this mixed solvent, again with crude oil and/or diesel oil mixing, Solid Free water shutoff agent can be obtained.In blocking agent solution the diesel oil of selective interpolation mainly in order to enable blocking agent solution when applying better with carry liquid and mix, significantly reduce blocking agent viscosity, improve pumping into property.The described liquid that carries can be rare crude oil and/or diesel oil, and be preferably rare crude oil, it can reduce costs compared to diesel oil.
According to specific embodiment of the invention scheme, in well deep part selective water plugging method of the present invention, described rare crude oil is the crude oil of below viscosity 100mPa.s.
According to specific embodiment of the invention scheme, in well deep part selective water plugging method of the present invention, step carries the water-in-oil emulsifier being also added with in liquid and accounting for and carry liquid weight 0.5-1% in (2), such as oleic acid etc.
According to specific embodiment of the invention scheme, in well deep part selective water plugging method of the present invention, inject the blocking agent oil liquid temperature 60 ~ 80 DEG C on stratum.
According to specific embodiment of the invention scheme, in well deep part selective water plugging method of the present invention, the consumption that blocking agent fluid injects stratum is 50 ~ 180m
3.
According to specific embodiment of the invention scheme, in well deep part selective water plugging method of the present invention, in step (3), displacement fluid is crude oil, clear water or oil field recharged waste water, and its consumption is 100 ~ 500m
3.The displacement fluid consumption adopted in the present invention is large compared with general water blockoff displacement fluid use amount, its object is to make blocking agent fluid can enter oil reservoir deep, to reach the object of deep water blockoff.
On the other hand, the invention provides a kind of blocking agent solution, this preparation blocking agent solution is the mixed liquor of resin particle in waste and old diaper and organic solvent or comprises the mixed liquor of diesel oil further, wherein, be 10 parts by weight with the resin particle in waste and old diaper, organic solvent is 5 ~ 15 weight portions, and the diesel oil comprised further is 10 ~ 200 weight portions; Wherein said organic solvent be selected from toluene, dimethylbenzene, methyl acetate, ethyl acetate, acetone one or more, preferred volume ratio is dimethylbenzene: methyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are toluene: ethyl acetate: the mixed solvent of acetone=2:4:1 and volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=2:4:1.Specifically, blocking agent solution of the present invention is prepared in accordance with the following methods and is obtained: join in 5 ~ 15 weight parts organic solvent by the resin particle in the waste and old diaper of 10 weight portion, and 40 ~ 60 DEG C of stirring and dissolving, obtain blocking agent solution; Or add the diesel oil of 10 ~ 200 weight portions further, be uniformly mixed, obtain blocking agent solution.
In the present invention, described " deep " with reference to Novel technique of in-depth profile control field, typically, can distinguish with near wellbore zone, and treatment radius is greater than 10 meters or treating capacity can be defined as deep more than 1000 sides.
In sum, the invention provides a kind of method utilizing the resin particle in waste and old diaper to implement the selective water plugging of oil reservoir deep.Tool of the present invention has the following advantages:
(1) cost is low, and raw material sources are wide, Environmental Safety.
(2) in blocking agent without solid particle, deep water blockoff can be realized.
(3) imbibition, by force selective, can water-solublely degrade, formation is pollution-free.
(4) former tubing string construction, technique is simple.
Detailed description of the invention
Describe the enforcement of technical solution of the present invention and the beneficial effect of generation in detail below by way of specific embodiment, be intended to help reader to understand essence of the present invention and feature better, not as can the restriction of practical range to this case.
The preparation of embodiment 1 blocking agent solution and evaluation
Joining reclaiming the waste and old wet diaper particle (mainly high-hydroscopicity Sodium Polyacrylate) obtained respectively by mixed solvent each in table one scheme k ~ n, being heated to 40 DEG C ~ 60 DEG C, stirring and dissolving.Experiment shows, waste and old wet diaper particle can in each mixed solvent of table one rapid solution, do not separate out after being cooled to room temperature.Production time efficiency can be improved.
The each component proportion of table one, mixed solvent
Embodiment 2
Joyous western oil field well, 1088.50 meters ~ 1115.00 meters 19 meters/4 layers, the 13rd steam injection.Mean permeability 2913.1mD (millidarcy), day production fluid 53.7m
3, day produce oil 1.1 tons, moisture 98%.Oil well High water cut, determines to take the selective water plugging of oil reservoir deep.
Implementation step is as follows:
1, reclaim waste and old diaper, the fabric outside the waste and old diaper of strip off, take out filler super absorbent resins such as (mainly) high-hydroscopicity Sodium Polyacrylate, starch-grafted polyacrylonitrile copolymer, dry for subsequent use;
2, the preparation of blocking agent solution: organic solvent is the mixed liquor that dimethylbenzene, ethyl acetate and acetone are mixed to get according to volume ratio 2:4:1, heating water bath to 50 DEG C, dry waste and old diaper filler particle for subsequent use join in organic solvent described in 10 weight portions by above-mentioned for 10 weight portions, limit edged stirs, until waste and old diaper filler particle all dissolves, add the diesel oil of 100 weight portions further, be uniformly mixed, obtain blocking agent solution, for subsequent use;
3, crude oil 100 side of on-the-spot preparation 70 DEG C, viscosity 42mPa.s, in the weight of crude oil for 100%, first adding weight is 1% oleic acid, then adds the blocking agent solution prepared of 20wt%, stirs, obtains blocking agent fluid;
4, with cementing truck, blocking agent fluid is clamp-oned stratum (oil well keeps former tubing string) from oil jacket annular space;
5, with oil field recharged waste water 100 side, blocking agent fluid is replaced to oil reservoir deep;
6, closing well 2 days, normal opening well and making production.
After enforcement, day production fluid 38.9 side, day produce oil 2.4 tons, moisture 93.8%, tiredly increase oil 126 tons, precipitation 1480 side, period of validity 102 days, successful.
Claims (10)
1. utilize waste and old diaper to implement a method for well deep part selective water plugging, the method comprising the steps of:
(1) blocking agent solution is prepared: join in 5 ~ 15 weight parts organic solvent by the resin particle in the waste and old diaper of 10 weight portion, 40 ~ 60 DEG C of stirring and dissolving, obtain blocking agent solution; Or add the diesel oil of 10 ~ 200 weight portions further, be uniformly mixed, obtain blocking agent solution; Wherein said organic solvent be selected from toluene, dimethylbenzene, methyl acetate, ethyl acetate, acetone one or more;
(2) with rare crude oil and/or diesel oil for carrying liquid, blocking agent solution step (1) prepared accounts for the amount of carrying liquid weight 0.8% ~ 2.5% according to the resin particle in wherein waste and old diaper and adds and carry in liquid, obtain blocking agent fluid, and blocking agent fluid is clamp-oned stratum from oil jacket annular space;
(3) with displacement fluid, the blocking agent fluid that step (2) is injected is headed into earth formation deep;
(4) closing well 1 ~ 2 day, normal opening well and making production.
2. method according to claim 1, wherein said organic solvent is volume ratio is dimethylbenzene: methyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are toluene: ethyl acetate: the mixed solvent of acetone=2:4:1 and volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=2:4:1.
3. method according to claim 1, wherein, described rare crude oil is the crude oil of below viscosity 100mPa.s.
4. the method according to claim 1 or 3, wherein, step carries the water-in-oil emulsifier being also added with in liquid and accounting for and carry liquid weight 0.5 ~ 1% in (2).
5. method according to claim 4, wherein, described water-in-oil emulsifier is oleic acid.
6. method according to claim 1, wherein, injects the blocking agent oil liquid temperature 60 ~ 80 DEG C on stratum in step (2).
7. method according to claim 1, wherein, in step (2), blocking agent fluid injects the consumption on stratum is 50 ~ 180m
3.
8. method according to claim 1, wherein, in step (3), displacement fluid is crude oil, clear water or oil field recharged waste water, and its consumption is 100 ~ 500m
3.
9. a blocking agent solution, this preparation blocking agent solution is the mixed liquor of resin particle in waste and old diaper and organic solvent or comprises the mixed liquor of diesel oil further, wherein, be 10 parts by weight with the resin particle in waste and old diaper, organic solvent is 5 ~ 15 weight portions, and the diesel oil comprised further is 10 ~ 200 weight portions; Wherein said organic solvent be selected from toluene, dimethylbenzene, methyl acetate, ethyl acetate, acetone one or more, preferred volume ratio is dimethylbenzene: methyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are toluene: ethyl acetate: the mixed solvent of acetone=2:4:1 and volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=2:4:1.
10. blocking agent solution according to claim 9, this blocking agent solution is prepared in accordance with the following methods and is obtained: join in 5 ~ 15 weight parts organic solvent by the resin particle in the waste and old diaper of 10 weight portion, and 40 ~ 60 DEG C of stirring and dissolving, obtain blocking agent solution; Or add the diesel oil of 10 ~ 200 weight portions further, be uniformly mixed, obtain blocking agent solution.
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