CN109423262A - A kind of acid-soluble sealing agent, acid-soluble liquid for plugging and preparation method thereof - Google Patents
A kind of acid-soluble sealing agent, acid-soluble liquid for plugging and preparation method thereof Download PDFInfo
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- CN109423262A CN109423262A CN201710757767.2A CN201710757767A CN109423262A CN 109423262 A CN109423262 A CN 109423262A CN 201710757767 A CN201710757767 A CN 201710757767A CN 109423262 A CN109423262 A CN 109423262A
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- parts
- acid
- sealing agent
- soluble
- plugging
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- 238000007789 sealing Methods 0.000 title claims abstract description 71
- 239000007788 liquid Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 80
- 239000007863 gel particle Substances 0.000 claims abstract description 33
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims abstract description 20
- 235000013312 flour Nutrition 0.000 claims abstract description 18
- 239000000440 bentonite Substances 0.000 claims abstract description 10
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 10
- 239000010440 gypsum Substances 0.000 claims abstract description 10
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 14
- 229920002292 Nylon 6 Polymers 0.000 claims description 6
- 229920001864 tannin Polymers 0.000 claims description 6
- 239000001648 tannin Substances 0.000 claims description 6
- 235000018553 tannin Nutrition 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 5
- 235000013339 cereals Nutrition 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 8
- 239000004615 ingredient Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 10
- YAPQBXQYLJRXSA-UHFFFAOYSA-N theobromine Chemical compound CN1C(=O)NC(=O)C2=C1N=CN2C YAPQBXQYLJRXSA-UHFFFAOYSA-N 0.000 description 10
- 239000000835 fiber Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229960004559 theobromine Drugs 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- -1 methylene bisacrylamide Amide Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 229940047670 sodium acrylate Drugs 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000002981 blocking agent Substances 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000001263 FEMA 3042 Substances 0.000 description 1
- 241000537371 Fraxinus caroliniana Species 0.000 description 1
- 241000237536 Mytilus edulis Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 235000010891 Ptelea trifoliata Nutrition 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000006367 bivalent amino carbonyl group Chemical group [H]N([*:1])C([*:2])=O 0.000 description 1
- 229910052599 brucite Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- FYHXNYLLNIKZMR-UHFFFAOYSA-N calcium;carbonic acid Chemical compound [Ca].OC(O)=O FYHXNYLLNIKZMR-UHFFFAOYSA-N 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229940074869 marquis Drugs 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000020638 mussel Nutrition 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000447 polyanionic polymer Polymers 0.000 description 1
- VBUNOIXRZNJNAD-UHFFFAOYSA-N ponazuril Chemical compound CC1=CC(N2C(N(C)C(=O)NC2=O)=O)=CC=C1OC1=CC=C(S(=O)(=O)C(F)(F)F)C=C1 VBUNOIXRZNJNAD-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010420 shell particle Substances 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920002258 tannic acid Polymers 0.000 description 1
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 1
- 229940033123 tannic acid Drugs 0.000 description 1
- 235000015523 tannic acid Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Material Composition (AREA)
Abstract
The present invention relates to a kind of acid-soluble sealing agents, acid-soluble liquid for plugging and preparation method thereof, belong to technical field of oilfield chemistry.Acid-soluble sealing agent of the invention includes the component of following parts by weight: 20-30 parts of cement, 20-40 parts of shell flour sand, 14-25 parts of calcium carbonate, 10-15 parts of gypsum, 3-6 parts of Fypro, 5-10 parts of bentonite, 0.3-0.6 parts of retarder, 3-10 parts of dry gel particle.Acid-soluble sealing agent of the invention and acid-soluble liquid for plugging are compounded using various ingredients, overcome the defects of prior art stress levels are lower, blocking radius is small, closure validity period is short, voltage endurance capability reaches 25MPa or more, and blocking radius reaches 2.0 meters or more, and acid-soluble ratio reaches 70% or more when de-plugging.
Description
Technical field
The present invention relates to a kind of acid-soluble sealing agents, acid-soluble liquid for plugging and preparation method thereof, belong to oilfield chemical technology
Field.
Background technique
Domestic many oil fields have entered high water cut development stage at present, with the implementation of " layer is arrived in water filling, and fine note is adopted ", layer
It is that division is more and more thinner, interlayer contradiction is increasing, the reservoir that can not implement mechanical card envelope poor for some hole conditions, generally in fact
Apply inorganic chemistry closure.But in subsequent adjustment well pattern, when need to utilize again to the plugged zone, chemical plugging removal is difficult to realize,
The mode that secondary perforations adding is usually taken carries out de-plugging, and success rate is lower.It therefore, is finely to adjust using the molten inorganic sealing agent of theobromine
Whole flooding pattern guarantees that oilfield stable production increases an effective measures of oil.
Application No. is 201010560084.6 Chinese invention patents to disclose a kind of drilling fluid protection low permeability reservoir
Sealing agent, component are as follows: the 10-40 parts of molten fibers of theobromine, 5-10 parts can oil-soluble resin, the 30-60 parts of molten particle and distortion particles of theobromine, 5-
10 parts of natural small molecule materials resistant to high temperatures, 10-15 parts of calcium carbonate.The basic component of the sealing agent is theobromine soluble fiber, can
The partial moisture distending in drilling fluid is adsorbed, under the action of flowing pressure, is formed block at pore throat rapidly.
Application No. is 201310748438.3 Chinese invention patents to disclose a kind of acidificable consolidation type sealing agent, heavy
Measure part composition and content are as follows: conch meal 20-40, calcium chloride 30-40, calcium carbonate superfine powder 10-15, polyanion cellulose
PAC0.1-0.5, sodium hydroxide 0.1-0.2, XC biopolymer 0.1-0.5, sodium metasilicate 0.3-0.6, potassium silicate 0.5-2.0.It should
Sealing agent has good temporarily stifled property, and condensation degree is adjustable, can quickly form temporarily stifled protective layer, shut-off capacity is strong, can be effectively
It prevents leak stopping from starching and enters reservoir deep, to protect oil-gas Layer well.
Application No. is 201410404560.3 Chinese invention patents to disclose a kind of high dehydration solidification pressure-bearing sealing agent, group
Part and mass ratio are as follows: inorganic mineral material 45-60%, fiber 10-20%, curing agent 15-25%, inorganic strengthening agent 5-10%,
Filter aid 0-8%.Its inorganic mineral material is grey calcium or active calcium silicate, and fiber is that brucite fiber or aluminum silicate ceramic are fine
Vinylon and cotton blend, curing agent are that gypsum, alkali carbonate, sodium chloride, calcium chloride compound, and inorganic strengthening agent is filter residue, mainly at
It is divided into the oxide of aluminium, filter aid is calcium silicates or precipitated calcium carbonate.This sealing agent using it is inorganic can acid soluble mineral and fibre
Dimension ensure that all solidfied materials can be molten by acid after being drilled well.
Application No. is 201610405313.4 Chinese invention patents to disclose a kind of peracid for improving Formation bearing pressure
Molten compound leakage-stop liquid, the invention is by biodegradable fiber FCL, high-strength tensile sealing agent GYD, acid-soluble GEL USED FOR PLUGGING WELL LOST CIRCULATION SHD
It is formed with drilling mud.High-strength tensile sealing agent GYD includes 40-65 parts of aluminum or aluminum alloy powder, expanded graphite 10-15
Part, 1-5 parts of silicon carbide, 5-15 parts of calcium oxide, 5-15 parts of floating bead, 1-5 parts of barium carbonate, 0.1-1 parts of manganese dioxide.The compound leak stopping
Agent has preferable shut-off capacity.
Application No. is 201410379550.9 Chinese invention patents to disclose a kind of acid-soluble compound leakage stop agent, the leak stopping
Agent mainly includes shell particle, pre-crosslinked gel volume expansion grain, fibrous material and agstone.In use with its matter
Amount is more uniform than for the drilling fluid mixed of 1:2-9, is configured to leak stopping slurry for drilling leakage blockage.
Above-mentioned sealing agent all has preferable acid-soluble, can effectively prevent mud seepage flow to reservoir depths and causes to miss, can
Play the role of preferable temporarily stifled.But above-mentioned sealing agent cannot form the high-intensitive solidification envelope for penetrating into producing well reservoir depths
It is stifled, it can not long-term high-intensitive pressure-bearing.It not can guarantee especially with high acid-soluble ratio, still have very high anti-
Compressive Strength, the long-acting closure being unable to satisfy in oil recovery producing well reservoir.
Summary of the invention
The purpose of the present invention is to provide a kind of acid-soluble sealing agents, to solve the compression strength of sealing agent in the prior art
Problem low, acid-soluble ratio is low.
The object of the invention is also to provide a kind of acid-soluble liquid for plugging and preparation method thereof.
To achieve the above object, the technical solution of acid-soluble sealing agent of the invention is:
A kind of acid-soluble sealing agent, the component including following parts by weight: 20-30 parts of cement, 20-40 parts of conch meal
Sand, 14-25 parts of calcium carbonate, 10-15 parts of gypsum, 3-6 parts of Fypro, 5-10 parts of bentonite, 0.3-0.6 parts
Retarder, 3-10 parts of dry gel particle.
It uses various ingredients in sealing agent of the invention to compound, wherein it is molten to all have preferable acid for calcium carbonate and gypsum
Property, the two compounding can effectively enhance the entire compression intensity after sealing agent solidifies.And both substances can also make to block
Agent has certain micro-expansibility, is to promote the cement plane on sealing agent and stratum finer and close, has stronger impermeability.
Bentonite has certain suspension, and bentonite is compounded with cement, shell flour sand, these substances can be made in water ash
It is used than being greater than in the environment of 3.0.There is high-intensitive cementing properties between shell flour sand and cement, good support can be played
The effect of agent.
The retarder is sulphur methyl tannin or tannic acid sodium.These retarder can make the molecule assemble index of sealing agent
Extend and mobility enhances, increases into the slurry to reservoir plugging, increase blocking radius.
The Fypro is nylon 6.Nylon 6 also known as bright and beautiful Buddhist nun 6, basic component be by amido bond (-
[NHCO] -) fatty polyamide that connects.The Fypro is that theobromine contains intermingle with nylon, is added in sealing agent
In, it is counter after sealing agent slurry can be made to enter stratum to spit reduced capability, and lacing wire can be played the role of when consolidation.
The partial size of the cement is 300-500 mesh.The cement of this granularity is superfine cement, utilizes this cement production systD
Slurry itself has good mobility and accessibility, can penetrate into the impermeable fine sand of ordinary cement particle and flour sand oil reservoir.
The shell flour sand is shellfish shell, freshwater mussel crab class shell, alcyonarian sea sand are ground is made.Shell flour sand also has
Good acid-soluble, acid-soluble ratio can reach 90% or more, and the shell flour sand of above-mentioned granularity has higher acid-soluble.Generally
, the partial size of the shell flour sand is 300 mesh.
The dry gel particle is pre-crosslinked gel particle powder, and the pre-crosslinked gel particle powder is by pre-crosslinked gel
Grinding obtains after grain drying.The water swellability of dry gel particle powder can effectively improve sealing agent into the presence after layer, and
After blocking agent is resident, gel particle absorbs the free water in blocking agent slurry, promotes sealing agent consolidated density bigger, intensity is higher.
The drying is in 75 DEG C of drying 48h.The pre-crosslinked gel particle powder is in 2 hours expansion rates less than 50%.The xerogel
The partial size of particle is 50 mesh.
The technical solution of acid-soluble liquid for plugging of the invention is:
The mass ratio of a kind of acid-soluble liquid for plugging, including sealing agent and water, the sealing agent and water is 1:0.8-1.5；Institute
State the component that sealing agent includes following parts by weight: 20-30 parts of cement, 25-40 parts of shell flour sand, 15-25 parts of carbonic acid
Calcium, 10-15 parts of gypsum, 3-6 parts of Fypro, 5-10 parts of bentonite, 0.3-0.6 parts of retarder, 3-10 parts
Dry gel particle.
The technical solution of the preparation method of acid-soluble liquid for plugging of the invention is:
A kind of preparation method of above-mentioned acid-soluble liquid for plugging includes the following steps: to mix each component of the sealing agent
Uniformly, then plus water mixes to obtain the final product.
The beneficial effects of the present invention are:
Acid-soluble sealing agent of the invention and acid-soluble liquid for plugging are compounded using various ingredients, overcome the prior art pressure-resistant
The defects of grade is lower, blocking radius is small, closure validity period is short, acid-soluble sealing agent voltage endurance capability of the invention reaches 25MPa
More than, blocking radius reaches 2.0 meters or more, and acid-soluble ratio reaches 70% or more when de-plugging.
Specific embodiment
Embodiments of the present invention are described further combined with specific embodiments below.
Embodiment 1
The acid-soluble sealing agent of the present embodiment include following weight percentage components: 25% cement, 25% shell
Flour sand, 15% calcium carbonate, 12% gypsum, 5% Fypro (nylon 6), 7.7% bentonite, 10% it is dry solidifying
Glue particle, 0.3% retarder sulphur methyl tannin；Wherein the partial size of cement is 300 mesh, and the partial size of shell flour sand is 300 mesh, is done
The partial size of gel particle is 50 mesh；Above-mentioned dry gel particle is pre-crosslinked gel particle powder, which is pre-
It is what 50 mesh obtained that cross-linked gel particle, which dries particulate abrasive to the partial size obtained after 48h at 75 DEG C,.The pre-crosslinked gel particle
Powder is in 2 hours expansion rates less than 50%.The pre-crosslinked gel particle is by acrylamide, sodium acrylate, N-N methylene bisacrylamide
Amide is made by polymerization.
The acid-soluble liquid for plugging of the present embodiment includes sealing agent and water, and the mass ratio of sealing agent and water is 1:1.5, sealing agent
For above-mentioned acid-soluble sealing agent.
The preparation method of the acid-soluble liquid for plugging of the present embodiment includes the following steps: each group of above-mentioned acid-soluble sealing agent
Then plus water point solid phase mixing, stirs evenly, and, stirs evenly to obtain the final product.
Zhongyuan Oil Field stone man oil-producing region H10-56 well is chosen as subjects, the well is due to adjusting well pattern, well S3On1,
It 2015-2020 meters, 3 meters/2 layers, needs temporarily to block.By above-mentioned acid-soluble liquid for plugging injection to plugged zone, treatment radius is
Plug is bored after 2.1m, Hou Ning 48h, and to test effect 23MPa qualified, after blocking 9 months, when well pattern adjusts again, de-plugging of acidizing treatment at
Function.
Embodiment 2
The acid-soluble sealing agent of the present embodiment include following weight percentage components: 30% cement, 20% shell
Flour sand, 19% calcium carbonate, 10% gypsum, 5% Fypro (nylon 6), 5.4% bentonite, 10% it is dry solidifying
Glue particle, 0.6% retarder sulphur methyl tannin；Wherein the partial size of cement is 500 mesh, and the partial size of shell flour sand is 300 mesh, is done
The partial size of gel particle is 50 mesh；Above-mentioned dry gel particle is pre-crosslinked gel particle powder, which is pre-
It is what 50 mesh obtained that cross-linked gel particle, which dries particulate abrasive to the partial size obtained after 48h at 75 DEG C,.The pre-crosslinked gel particle
Powder is in 2 hours expansion rates less than 50%.The pre-crosslinked gel particle is by acrylamide, sodium acrylate, N-N methylene bisacrylamide
Amide is made by polymerization.
The acid-soluble liquid for plugging of the present embodiment includes sealing agent and water, and the mass ratio of sealing agent and water is 1:1.5, sealing agent
For above-mentioned acid-soluble sealing agent.
The preparation method of the acid-soluble liquid for plugging of the present embodiment includes the following steps: each group of above-mentioned acid-soluble sealing agent
Then plus water point solid phase mixing, stirs evenly, and, stirs evenly to obtain the final product.
Zhongyuan Oil Field Hu shape oil-producing region H5-73 well is chosen as subjects, the well is due to adjusting well pattern, well S3Under6,
It 1986-1996 meters, 6 meters/6 layers, needs temporarily to block.By above-mentioned acid-soluble liquid for plugging injection to plugged zone, treatment radius is
Plug is bored after 2.6m, Hou Ning 48h tests effect 25MPa qualification, after blocking 13 months, when well pattern adjusts again, de-plugging of acidizing treatment
Success.
Embodiment 3
The acid-soluble sealing agent of the present embodiment include following weight percentage components: 20% cement, 30% shell
Flour sand, 20% calcium carbonate, 10% gypsum, 5% Fypro (nylon 6), 10% bentonite, 4.7% it is dry solidifying
Glue particle, 0.3% retarder sulphur methyl tannin；Wherein the partial size of cement is 400 mesh, and the partial size of shell flour sand is 300 mesh, is done
The partial size of gel particle is 50 mesh；Above-mentioned dry gel particle is pre-crosslinked gel particle powder, which is pre-
It is what 50 mesh obtained that cross-linked gel particle, which dries particulate abrasive to the partial size obtained after 48h at 75 DEG C,.The pre-crosslinked gel particle
Powder is in 2 hours expansion rates less than 50%.The pre-crosslinked gel particle is by acrylamide, sodium acrylate, N-N methylene bisacrylamide
Amide is made by polymerization.
The acid-soluble liquid for plugging of the present embodiment includes sealing agent and water, and the mass ratio of sealing agent and water is 1:1.5, sealing agent
For above-mentioned acid-soluble sealing agent.
The preparation method of the acid-soluble liquid for plugging of the present embodiment includes the following steps: each group of above-mentioned acid-soluble sealing agent
Then plus water point solid phase mixing, stirs evenly, and, stirs evenly to obtain the final product.
Zhongyuan Oil Field celebrating ancestral's oil-producing region Q8 well is chosen as subjects, the well is due to adjusting well pattern, well S3Under4, 2106-
It 2126 meters, 10 meters/8 layers, needs temporarily to block.By above-mentioned acid-soluble liquid for plugging injection to plugged zone, treatment radius 2.0m, marquis
Plug is bored after solidifying 48h tests effect 30MPa qualification, after blocking 18 months, when well pattern adjusts again, de-plugging of acidizing treatment success.
The ingredient and content of sealing agent in embodiment 4-10 are as shown in table 1, other identical as in embodiment 1.
The ingredient and content of sealing agent in 1 embodiment 4-10 of table
Test example
1) compression strength is tested
Acid-soluble sealing agent prepared in embodiment 1-10 and clear water are thoroughly mixed according to mass ratio 1.2:1
It is even, it pours into standard cube container, is placed in baking oven after 60 DEG C of thermostatic curing 48h, the sealing agent consolidated is taken out, with anti-
Compressive Strength tester test, without broken at 25MPa.
2) acid-soluble ratio is tested
By above-mentioned steps 1) in cured sealing agent it is dry after smash, take 2g to be put into beaker, 100mL acid solution be added,
It is slightly stirred with glass bar, covers reaction, after reacting stopping, being filtered with glass funnel, distillation water washing to no chloride ion (is used
AgNO3Solution is examined, and is generated without apparent white precipitate), drying weighing.Then acid-soluble ratio is calculated according to the following formula:
S=(m1-m2) × 100%/m1
In formula: S is acid-soluble ratio (%)；m1For sample mass (g)；m2For mass of residue (g).
Calculated result is as shown in table 2.
The performance test results of the sealing agent of 2 embodiment 1-10 of table
| Embodiment | Compression strength (MPa) | Acid-soluble ratio (%) |
| 1 | 23 | - |
| 2 | 25 | - |
| 3 | 30 | - |
| 4 | 26 | 80 |
| 5 | 28 | 73 |
| 6 | 26 | 75 |
| 7 | 27 | 71 |
| 8 | 26 | 76 |
| 9 | 28 | 72 |
| 10 | 30 | 72 |
As shown in Table 2, the acid-soluble ratio of sealing agent is all larger than 70% in embodiment 4-10, and compression strength is all larger than 25MPa.
Claims (9)
1. a kind of acid-soluble sealing agent, which is characterized in that the component including following parts by weight: 20-30 parts of cement, 20-40
Part shell flour sand, 14-25 parts of calcium carbonate, 10-15 parts of gypsum, 3-6 parts of Fypro, 5-10 parts of bentonite,
0.3-0.6 parts of retarder, 3-10 parts of dry gel particle.
2. acid-soluble sealing agent according to claim 1, it is characterised in that: the retarder is sulphur methyl tannin or tannin
Sour sodium.
3. acid-soluble sealing agent according to claim 1, it is characterised in that: the Fypro is nylon 6.
4. acid-soluble sealing agent according to claim 1, it is characterised in that: the partial size of the cement is 300-500 mesh.
5. acid-soluble sealing agent according to claim 1, it is characterised in that: the partial size of the shell flour sand is 300 mesh.
6. acid-soluble sealing agent according to claim 1, it is characterised in that: the dry gel particle is pre-crosslinked gel
Grain powder, the dry gel particle powder are that grinding obtains after drying pre-crosslinked gel particle.
7. acid-soluble sealing agent according to claim 6, it is characterised in that: the partial size of the dry gel particle is 50 mesh.
8. a kind of acid-soluble liquid for plugging, which is characterized in that including sealing agent and water, the mass ratio of the sealing agent and water is 1:
0.8-1.5；The sealing agent includes the component of following parts by weight: 20-30 parts of cement, 25-40 parts of shell flour sand, 15-
25 parts of calcium carbonate, 10-15 parts of gypsum, 3-6 parts of Fypro, 5-10 parts of bentonite, 0.3-0.6 parts of slow setting
Agent, 3-10 parts of dry gel particle.
9. a kind of preparation method of acid-soluble liquid for plugging as claimed in claim 8, which comprises the steps of: will
The each component of the sealing agent is uniformly mixed, and then plus water mixes to obtain the final product.
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