CN103421477A - Preparation method of blocking remover for relieving near-wellbore area gas condensate and particle obstruction - Google Patents
Preparation method of blocking remover for relieving near-wellbore area gas condensate and particle obstruction Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000002245 particle Substances 0.000 title claims abstract description 13
- 230000000903 blocking effect Effects 0.000 title abstract 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 66
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000003350 kerosene Substances 0.000 claims abstract description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 18
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004927 clay Substances 0.000 claims abstract description 16
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 14
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 14
- 239000003381 stabilizer Substances 0.000 claims abstract description 14
- IVKNZCBNXPYYKL-UHFFFAOYSA-N 2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol Chemical compound CC(C)(C)CC(C)(C)C1=CC=C(OCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO)C=C1 IVKNZCBNXPYYKL-UHFFFAOYSA-N 0.000 claims abstract description 13
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims abstract description 7
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 74
- 238000006073 displacement reaction Methods 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 24
- 230000000694 effects Effects 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000013543 active substance Substances 0.000 claims description 15
- 239000002283 diesel fuel Substances 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000013019 agitation Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 abstract description 16
- 239000004094 surface-active agent Substances 0.000 abstract description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 239000011737 fluorine Substances 0.000 abstract 1
- 229910052731 fluorine Inorganic materials 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 229910052700 potassium Inorganic materials 0.000 abstract 1
- 239000001103 potassium chloride Substances 0.000 abstract 1
- 235000011164 potassium chloride Nutrition 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 71
- 239000003921 oil Substances 0.000 description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 32
- 230000006378 damage Effects 0.000 description 25
- 208000027418 Wounds and injury Diseases 0.000 description 22
- 208000014674 injury Diseases 0.000 description 22
- 239000002253 acid Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 239000011435 rock Substances 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 238000005406 washing Methods 0.000 description 8
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- 230000005494 condensation Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 238000011084 recovery Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
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- 230000005012 migration Effects 0.000 description 1
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Abstract
The invention provides a preparation method of a blocking remover for relieving near-wellbore area gas condensate and particle obstruction. The blocking remover comprises following components, taking mass ratio and gram as the measurement units, A: an FC-3B fluorine-containing surfactant, B: potassium chloride, C: methanol, D: isopropanol, E: OP-10, F: ethylene glycol monobutyl ether, G: kerosene, H: toluene, I: 12% hydrochloric acid, K: 3% hydrofluoric acid, L: Span-80, M: cetylamine, N: a corrosion inhibitor WD-11, O: an iron ion stabilizer WD-8, and P: a clay stabilizer WD-5. A mixed solution U is prepared from A, B and C, wherein the mass ratio of A to B to C is 1-1.5:1:97.5-98; a mixed solution V is prepared from D, F, G, H, and E, wherein the mass ratio of D to F to G to H to E is 2-5:2-5:3-5:13-25:60-80; Q is composed of G and I, R is composed of J and K, S is composed of L and M, then a mixed solution T is prepared from G, R, and S, the mass ratio of G to R to S is 29:67.9:3.1; a mixed solution W is prepared from A and C, wherein the mass ratio of A to C is 1-1.5:99-98.5; finally the mixed solution W,N,O and P, which respectively account for 1% of the weight of the mixed solution T, are added into the mixed solution T, so as to obtain a mixed solution X.
Description
Technical field
The present invention relates to the oil-gas field oil recovery and remove unblocking agent of immediate vicinity of wellbore condensate oil and particle plugging and preparation method thereof.
Background technology
About condensate gas well water, lock both at home and abroad, the experimental study of retrograde fall out pollution mechanism, and remove gas-condensate well immediate vicinity of wellbore Pollution Study and done a large amount of work.Some oil-gas fields mainly adopt Acidizing Technology to the de-plugging of removing the immediate vicinity of wellbore pollution or annotate the mixed solution methods such as methyl alcohol, notes ethanol.The immediate vicinity of wellbore that bring the releasing retrograde fall out Zhongyuan Oil Field is polluted and has been adopted the technology of injecting mutual solvent, mainly comprises: methyl alcohol+nitrogen soak Technology application.And other oil field mainly adopts Acidizing Technology to remove the immediate vicinity of wellbore pollution.Pollute although methyl alcohol+nitrogen soak can be removed the immediate vicinity of wellbore that retrograde fall out brings, can not remove the particle plugging caused as dirt etc.Acidifying is enough removed particle plugging and is polluted, and can not remove the immediate vicinity of wellbore pollution that retrograde fall out brings, and requires acid not pollute reservoir simultaneously, and will suppress hydration swelling and the fine migration injury of clay; The injury that first and second depositing damage in Reservoir Acidization and hollow billet delay effect etc. cause, the most effective way is exactly for different type of injury, should take corresponding Prevention Technique and measure.On the one hand can pass through the preferred acid metallization processes, such as: retarded acid, gel acid, emulsified acid, foamed acid, hydrochloric acid rinse in advance, spontaneous acid or composite acid acidification technique, the formation damage caused at utmost to alleviate acidizing treatment; On the other hand can by select suitable chemical additive as: clay stabilizer, Fe stabilizer, cleanup additive and anti-newborn emulsion splitter etc. prevent and alleviate the formation damage that acidizing treatment causes.As far back as 1979, Hoditch.S.A just proposed the concept of " water lock ".Zhang Yan etc. think that the additional pressure that the infringement of water lock is mainly produced by capillary pressure and Jamin effect causes, water base or hydrocarbon compound base flow body is captured, perhaps in gas generation process, retrograde fall out hydrocarbon compound fluid in reservoir is captured, all cause liquid phase residual, the liquid hold-up effect is to cause the topmost factor of tight gas reservoir infringement.
The unblocking agent of the present invention design and preparation, be the pollution that particle plugging is caused remove, have Waterproof lock, there is strong dissolving and clean that condensate oil is function, composite blockage relieving agent technology that prevent clay swelling and the row of helping solves the problem of removing immediate vicinity of wellbore condensate oil and particle plugging in oil-gas field christmas engineering.
Summary of the invention
The object of the invention is to: be provided for the recover the oil unblocking agent of anti-condensate oil and particle plugging of oil-gas field, the Waterproof lock had, dissolve by force and clean the condensate oil function, become the compound deplugging technology that prevents clay swelling and help row function.
The object of the present invention is achieved like this:
?A kind of unblocking agent preparation method who removes immediate vicinity of wellbore condensate oil and particle plugging, raw material is prepared with mass ratio, and unit is gram; Component is: A FC-3B fluorochemical surface tensio-active agent, B Repone K, C methyl alcohol, D Virahol, E OP-10, F butyl glycol ether, G kerosene, H toluene, I diesel oil, J 12% hydrochloric acid, K 3% hydrofluoric acid, L Span-80, M cetylamine, N inhibiter WD-11, O Fe stabilizer WD-8, P clay stabilizer WD-5; Through being prepared into unblocking agent;
The preparation of raw material and the preparation of mixing solutions:
1) preparation of U solution: A and B are placed in to the container containing C, stir 4-6 minute under 1000 rev/mins, mix to obtain solution U; The mass ratio of its A:B: C is 1-1.5:1:97.5-98;
2) preparation of V solution: D, F, G, H are placed in to container successively and mix, then add E, stir 4-6 minute under 1000 rev/mins, mix to obtain V solution; The mass ratio of its D:E:F:G:H is 2-5:2-5:3-5:13-25:60-80;
3) preparation of T solution: be that 4:1 is made into Q by the mass ratio of G:I; The mass ratio of J:K is that 1:1 is made into R; The mass ratio of L:M is that 7:1 is made into S; Q, R, S are placed in to container successively, stir 18-22 minute under 1000 rev/mins, mix to obtain solution T; Wherein the mass ratio of Q:R:S is 29:67.9:3.1;
4) preparation of X solution: A is placed in to the container containing C, stirs 4-6 minute under 1000 rev/mins, mix to obtain solution W, wherein A: the mass ratio of C is 1-1.5:98.5-99; Under agitation add again 1% the mixing solutions W that accounts for mixing solutions T quality, account for 1% N of mixing solutions T quality, account for the 1%O of mixing solutions T quality and account for the 1%P of mixing solutions T quality, must mix X solution.
Know-why of the present invention: fluorochemical surfactant, OP-10 tensio-active agent in unblocking agent, they have the capillary character of very strong reduction, thereby guarantee to reduce capillary resistance, reduction and anti-sealing lock, the dissemination simultaneously condensate oil had, thus the obstruction of condensate oil is removed in assurance; Repone K has the ability of the clay swelling of preventing; The ability of the dissolving condensate oil that methyl alcohol, Virahol, butyl glycol ether, kerosene, diesel oil and toluene have had and low capillary character, thereby the obstruction that guarantees to reduce capillary resistance, reduction and anti-sealing lock and remove condensate oil; The performance of the dissolving that hydrochloric acid and hydrofluoric acid have had and etching sandstone, thus the obstruction of rock particles, dirt is removed in assurance.
Mixing solutions U prepared by the present invention, surface tension is 22.5mN/m at room temperature, rock core is respectively to 41.4% left and right to the injury rate of 102 wells not when the displacement pressure 1MPa displacement time 10min, than adding 1%NH
4The Cl aqueous solution all can reduce greatly, and reduced rate is more than 14.8%, has extraordinary Waterproof lock effect and pure water comparison centrifuging records the anti-clayswelling rate more than 85.0%.
After mixing solutions V prepared by the present invention and water mix, the surface tension of its water is at room temperature also by 71.94 mN/m of pure water, be reduced to 34.5mN/m, can reduce greatly the water lock, to rock core when the displacement pressure 1MPa displacement time 10min not the injury rate of 102 wells be respectively 37.4% left and right, than adding 1%NH
4The Cl aqueous solution reduces greatly, and reduced rate is more than 18.7%.So just protected reservoir; have extraordinary anti-liquid lock effect, just reach more than 96.0% at the 30min displacement efficiency, the basic washing oil of 60min is complete; record clay with pure kerosene comparison centrifuging and substantially do not expand, and pure water comparison centrifuging records the anti-clayswelling rate more than 99.5%.
Mixing solutions X prepared by the present invention has low-down surface tension, be at room temperature 21.2 mN/m, injury rate to synthetic core when displacement pressure 1MPa displacement time 10min is respectively 51.2% left and right, at 55 ℃ of lower 30min displacement efficiencies, just reach more than 93.0%, the basic washing oil of 120min is complete.Xinjiang Oilfield basin 5 condensation dewatered oils are more than 39.0% to the injury rate of core plugging, and after employing mixing solutions V, rate of permeation can return to 79% left and right of initial value, and the de-plugging rate is all more than 50,0%.
The unblocking agent that the present invention removes immediate vicinity of wellbore condensate oil and particle plugging divides liquid, respectively two kinds the combination or three kinds be combined into the unblocking agent that slug obtains, very effective, best in quality, for enterprise has increased abundant economic benefit, show technical progress.
Embodiment
The present invention is described further in conjunction with the embodiments.
Embodiment 1
The unblocking agent preparation:
1) FC-3B fluorochemical surface tensio-active agent, Repone K and methyl alcohol are 1:1:98 according to mass ratio, and FC-3B fluorochemical surface tensio-active agent and Repone K are dissolved in methyl alcohol, under 1000 rev/mins, stir 5 minutes, evenly, obtain mixing solutions U;
2) Virahol, OP-10, butyl glycol ether, kerosene and toluene are 3:3:3:15:76 according to mass ratio; Virahol, butyl glycol ether, kerosene and toluene are mixed, then OP-10 is added in mixed solution, stir 5 minutes under 1000 rev/mins, evenly, obtain mixing solutions V;
Above 2 kinds of mixing solutionss are formed, for Xinjiang Oilfield basin 5 condensation dewatered oils, to the injury rate of core plugging, be 37.1%, and after adopting mixing solutions U de-plugging, rate of permeation can return to 84.1% of initial value, de-plugging rate 59.6%, show to have the ability of stronger erase residual oil, the plugging removal effect had.
Application operating: first inject mixing solutions V slug 15m
3, and then inject mixing solutions U slug 40 m
3
Effect: after mixing solutions V and water mix, the surface tension of its water at room temperature, also by 71.94 mN/m of pure water, is reduced to 34.7mN/m, can reduce greatly the water lock; To rock core when the displacement pressure 1MPa displacement time 10min not the injury rate of 102 wells be respectively 37.7%, than adding 1%NH
4The Cl aqueous solution reduces greatly, and reduced rate is 19.8%; Just reach the basic washing oil of 97.2%, 60min at 55 ℃ of lower 30min displacement efficiencies complete, and pure kerosene comparison centrifuging records clay and substantially do not expand, and pure water comparison centrifuging records the anti-clayswelling rate 99.8%.
Embodiment 2
The unblocking agent preparation:
1) FC-3B fluorochemical surface tensio-active agent, Repone K and methyl alcohol are 1.5:1:97.5 according to mass ratio, and FC-3B fluorochemical surface tensio-active agent and Repone K are dissolved in methyl alcohol, under 1000 rev/mins, stir 5 minutes, evenly, obtain mixing solutions U;
2) the mixing acid R that the mixed solution Q that is 4:1 by the mass ratio of kerosene and diesel oil and the mass ratio of 12% hydrochloric acid and 3% hydrofluoric acid are 1:1 mixes according to the ratio of 29:67.9, then adds the S3.1 that the mass ratio of Span-80 and cetylamine is 7:1; The mass ratio of Q:R:S is 29:67.9:3.1, under 1000 rev/mins of rotating speeds, stirs and within 20 minutes, obtains mixing solutions T; FC-3B fluorochemical surface tensio-active agent and methyl alcohol are 1:99 according to mass ratio, and FC-3B fluorochemical surface surfactant dissolves, in methyl alcohol, is stirred under 1000 rev/mins of rotating speeds, obtain mixing solutions W; Add 1% the mixing solutions W that accounts for mixing solutions T quality under stirring again under 1000 rev/mins of rotating speeds; account for T quality 1%N acidifying inhibiter WD-11; account for T quality 1%O Fe stabilizer WD-8 and account for T quality 1%P clay stabilizer WD-5, stirring 5 minutes, obtaining mixing solutions X;
Common to form for Xinjiang Oilfield basin 5 condensation dewatered oils be 36.4% to the injury rate of core plugging by above 2 kinds, and after adopting mixing solutions U de-plugging, rate of permeation can return to 85.1% of initial value, de-plugging rate 58.6%, show to have the ability of stronger erase residual oil, the plugging removal effect had.
Application operating: first inject mixing solutions U slug 80m when practical application
3, and then inject mixing solutions X slug 30 m
3
Effect: the surface tension of mixing solutions U is 22.5mN/m at room temperature, rock core is respectively to 41.5% to the injury rate of 102 wells not when the displacement pressure 1MPa time 10min, than adding 1%NH
4The Cl aqueous solution all can reduce greatly, reduced rate is 15.2%, there is extraordinary Waterproof lock effect, record the anti-clayswelling rate 85.4% with pure water comparison centrifuging, mixing solutions V has low-down surface tension, is at room temperature 21.2 mN/m, injury rate to synthetic core when displacement pressure 1MPa displacement time 10min is respectively 51.2%, just reaching the basic washing oil of 93.6%, 120min at 55 ℃ of lower 30min displacement efficiencies complete, is 39.2% to the injury rate of core plugging.After adopting mixing solutions V, rate of permeation can return to 79.5% of initial value.De-plugging rate 50.7%.
Embodiment 3
The unblocking agent preparation:
1) Virahol, OP-10, butyl glycol ether, kerosene and toluene are 5:5:5:25:60 according to mass ratio; Virahol, butyl glycol ether, kerosene and toluene are mixed, then OP-10 is added in mixed solution, stir 5 minutes under 1000 rev/mins, evenly, obtain mixing solutions V;
2) the mixing acid R that the mixed solution Q that is 4:1 by the mass ratio of kerosene and diesel oil and the mass ratio of 12% hydrochloric acid and 3% hydrofluoric acid are 1:1 mixes according to the ratio of 29:67.9, the S3.1 that the mass ratio that adds again Span-80 and cetylamine is 7:1, the mass ratio of Q:R:S is 29:67.9:3.1, under 1000 rev/mins of rotating speeds, stirs and within 20 minutes, obtains mixing solutions T; Be 1.5:98.5 by FC-3B fluorochemical surface tensio-active agent and methyl alcohol according to mass ratio, FC-3B fluorochemical surface surfactant dissolves, in methyl alcohol, is stirred under 1000 rev/mins of rotating speeds, obtain mixing solutions W; Under agitation add again 1% the mixing solutions W that accounts for mixing solutions T quality, account for T quality 1%N acidifying inhibiter WD-11, account for T quality 1%O Fe stabilizer WD-8 and account for T quality 1%P clay stabilizer WD-5, stir 5 minutes, obtain mixing solutions X;
Common to form for Xinjiang Oilfield basin 5 condensation dewatered oils be 38.1% to the injury rate of core plugging by above 2 kinds.And after adopting mixing solutions V de-plugging, rate of permeation can return to 88.2% of initial value.De-plugging rate 67.3%, plugging removal effect is good.
Application operating: first inject mixing solutions V slug 20 m during application
3, and then inject mixing solutions X slug 25m
3
Effect: after mixing solutions V and water mix, the surface tension of its water at room temperature, also by 71.94 mN/m of pure water, is reduced to 34.5mN/m.Can reduce greatly water lock, to rock core when the displacement pressure 1MPa displacement time 10min not the injury rate of 102 wells be respectively 37.6%, than adding 1%NH
4The Cl aqueous solution reduces greatly, and reduced rate, 20.8%, has so just been protected reservoir, has extraordinary anti-liquid lock effect; Just reach 97% at 55 ℃ of lower 30min displacement efficiencies, the basic washing oil of 60min is complete, recording clay with pure kerosene comparison centrifuging does not expand substantially, record the anti-clayswelling rate 99.8% with pure water comparison centrifuging, mixing solutions V has low-down surface tension, be at room temperature 21.2 mN/m, the injury rate to synthetic core when displacement pressure 1MPa displacement time 10min is respectively 51.3%.Just reach the basic washing oil of 95.2%, 120min at the 30min displacement efficiency complete.
Embodiment 4
The unblocking agent preparation:
1) FC-3B fluorochemical surface tensio-active agent, Repone K and methyl alcohol are 1.5:1:97.5 according to mass ratio, and FC-3B fluorochemical surface tensio-active agent and Repone K are dissolved in methyl alcohol, under 1000 rev/mins, stir 5 minutes, evenly, obtain mixing solutions U;
2) Virahol, OP-10, butyl glycol ether, kerosene and toluene are 5:5:5:25:60 according to mass ratio; Virahol, butyl glycol ether, kerosene and toluene are mixed, then OP-10 is added in mixed solution, under 1000 rev/mins, stir and stir in 5 minutes, obtain mixing solutions V;
3) the mixing acid R that the mixed solution Q that is 4:1 by the mass ratio of kerosene and diesel oil and the mass ratio of 12% hydrochloric acid and 3% hydrofluoric acid are 1:1 mixes according to the ratio of 29:67.9, the S3.1 that the mass ratio that adds again Span-80 and cetylamine is 7:1, the mass ratio of Q:R:S is 29:67.9:3.1, under 1000 rev/mins of rotating speeds, stirs and within 20 minutes, obtains mixing solutions T; FC-3B fluorochemical surface tensio-active agent and methyl alcohol are 1.5:98.5 according to mass ratio, and FC-3B fluorochemical surface surfactant dissolves, in methyl alcohol, is stirred under 1000 rev/mins, obtain mixing solutions W; Add again 1% the mixing solutions W that accounts for mixing solutions T quality under 1000 rev/mins of stirrings, account for 1% N of mixing solutions T quality, account for the 1%O of mixing solutions T quality and account for the 1%P of mixing solutions T quality, must mix X solution;
Common to form for Xinjiang Oilfield basin 5 condensation dewatered oils be 37.2% to the injury rate of core plugging by above 3 kinds, and after adopting mixing solutions U de-plugging, rate of permeation can return to 83.1% of initial value, the de-plugging rate is all 58.7%, show to have the ability of stronger erase residual oil, the plugging removal effect had.
Application operating: first inject mixing solutions V slug 20 m during application
3, and then inject mixing solutions section U slug 24 m
3, finally inject mixing solutions X slug 15m
3
Effect: the surface tension of mixing solutions U is 22.5mN/m at room temperature, rock core is respectively to 41.6% to the injury rate of 102 wells not when the displacement pressure 1MPa displacement time 10min, than adding 1%NH
4The Cl aqueous solution all can reduce greatly, and reduced rate, 15.3%, has extraordinary Waterproof lock effect, and pure water comparison centrifuging records the anti-clayswelling rate 86.2%.After mixing solutions V and water mix, the surface tension of its water at room temperature, also by 71.94 mN/m of pure water, is reduced to 34.5mN/m, can reduce greatly the water lock, to rock core when the displacement pressure 1MPa displacement time 10min not the injury rate of 102 wells be respectively 37.4%, than adding 1%NH
4The Cl aqueous solution reduces greatly, and reduced rate is 18.8%; So just protect reservoir, there is extraordinary anti-liquid lock effect; Just reach the basic washing oil of 96.2%, 60min at 55 ℃ of lower 30min displacement efficiencies complete, and pure kerosene comparison centrifuging records clay and substantially do not expand, and pure water comparison centrifuging records the anti-clayswelling rate 99.9%.
Embodiment 5
The unblocking agent preparation:
1) FC-3B fluorochemical surface tensio-active agent, Repone K and methyl alcohol are 1.5:1:97.5 according to mass ratio, and FC-3B fluorochemical surface tensio-active agent and Repone K are dissolved in methyl alcohol, under 1000 rev/mins, stir 5 minutes, evenly, obtain mixing solutions U;
2) Virahol, OP-10, butyl glycol ether, kerosene and toluene are 5:5:5:25:60 according to mass ratio; Virahol, butyl glycol ether, kerosene and toluene are mixed, then OP-10 is added in mixed solution, stir 5 minutes under 1000 rev/mins, evenly, obtain mixing solutions V;
Common to form for Xinjiang Oilfield basin 5 condensation dewatered oils be 37.1% to the injury rate of core plugging by above 2 kinds, and after adopting mixing solutions U de-plugging, rate of permeation can return to 84.9% of initial value, de-plugging rate 60.3%, show to have the ability of stronger erase residual oil, the plugging removal effect had.
Application operating: first inject mixing solutions U slug 45 m when practical application
3, and then inject mixing solutions V slug 18 m
3
Effect: the surface tension of mixing solutions U is 22.7mN/m at room temperature, rock core is respectively to 41.3% to the injury rate of 102 wells not when the displacement pressure 1MPa displacement time 10min, than adding 1%NH
4The Cl aqueous solution all can reduce greatly, and reduced rate is 17.3%; There is extraordinary Waterproof lock effect, and pure water comparison centrifuging records the anti-clayswelling rate 85.8%; After mixing solutions V and water mix, the surface tension of its water at room temperature, also by 71.94 mN/m of pure water, is reduced to 34.7mN/m, can reduce greatly the water lock; To rock core when the displacement time 10min not the injury rate of 102 wells be respectively 36.9%; Than adding 1%NH
4The Cl aqueous solution reduces greatly, and reduced rate is 20.6%; Protect reservoir, there is extraordinary anti-liquid lock effect; Just reach the basic washing oil of 97.8%, 60min at 55 ℃ of lower 30min displacement efficiencies complete, and pure kerosene comparison centrifuging records clay and substantially do not expand, and pure water comparison centrifuging records the anti-clayswelling rate 99.7%.
Raw material Repone K, methyl alcohol, OP-10, butyl glycol ether, toluene, hydrochloric acid and hydrofluoric acid that test is selected are analytical pure, by the Long Huagongshijichang of Chengdu section, are produced; Kerosene, diesel oil are industrial goods; Virahol is analytical pure, by east, Leshan chemical reagent factory, is produced; Span-80(anhydrous sorbitol list oil/acid esters HLB value is 4.7) be chemical pure, by the about industry of Shanghai Volkswagen company limited, produced; Amino dodecane is chemical pure, and by Tianjin, recovery fine chemistry industry institute produces; FC-3B fluorochemical surface tensio-active agent is technical pure, by Shanghai organic chemistry institute, is produced; For acidifying, inhibiter WD-11, Fe stabilizer WD-8 and 1% clay stabilizer WD-5 are industrial goods, by Fukang, Chengdu petrochemical complex Science and Technology Ltd., are produced.
The high speed frequency conversion stepless time adjustment stirrer GJD-D12P that test is used for Qingdao with the spring oil Instrument Ltd. produce; Full-automatic interfacial tensimeter DT-102A is that ZiBo HuaKun Electronic Instrument Co., Ltd produces; Pressure core flow tester is produced by Hai'an, Jiangsu oil instrument company.
Claims (2)
1. a unblocking agent preparation method who removes immediate vicinity of wellbore condensate oil and particle plugging, it is characterized in that: raw material is prepared with mass ratio, and unit is gram; Component is: A FC-3B fluorochemical surface tensio-active agent, B Repone K, C methyl alcohol, D Virahol, E OP-10, F butyl glycol ether, G kerosene, H toluene, I diesel oil, J 12% hydrochloric acid, K 3% hydrofluoric acid, L Span-80, M cetylamine, N inhibiter WD-11, O Fe stabilizer WD-8, P clay stabilizer WD-5; Through being prepared into unblocking agent;
The preparation of raw material and the preparation of mixing solutions:
1) preparation of U solution: A and B are placed in to the container containing C, stir 4-6 minute under 1000 rev/mins, mix to obtain solution U; The mass ratio of its A:B: C is 1-1.5:1:97.5-98;
2) preparation of V solution: D, F, G, H are placed in to container successively and mix, then add E, stir 4-6 minute under 1000 rev/mins, mix to obtain V solution; The mass ratio of its D:E:F:G:H is 2-5:2-5:3-5:13-25:60-80;
3) preparation of T solution: be that 4:1 is made into Q by the mass ratio of G:I; The mass ratio of J:K is that 1:1 is made into R; The mass ratio of L:M is that 7:1 is made into S; Q, R, S are placed in to container successively, stir 18-22 minute under 1000 rev/mins, mix to obtain solution T; Wherein the mass ratio of Q:R:S is 29:67.9:3.1;
4) preparation of X solution: A is placed in to the container containing C, stirs 4-6 minute under 1000 rev/mins, mix to obtain solution W, wherein A: the mass ratio of C is 1-1.5:98.5-99; Under agitation add again 1% the mixing solutions W that accounts for mixing solutions T quality, account for 1% N of mixing solutions T quality, account for the 1%O of mixing solutions T quality and account for the 1%P of mixing solutions T quality, must mix X solution.
2. preparation method according to claim 1 is characterized in that: the regulation effect of this agent, use mixing solutions U, and record the anti-clayswelling rate 99.9%; Use mixing solutions V, displacement efficiency reaches 93-98%; Use mixing solutions X, the de-plugging rate is at 50-60%.
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