CN104263346A - Acidic weighted fracturing fluid and preparation method and application thereof - Google Patents
Acidic weighted fracturing fluid and preparation method and application thereof Download PDFInfo
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- CN104263346A CN104263346A CN201410441545.6A CN201410441545A CN104263346A CN 104263346 A CN104263346 A CN 104263346A CN 201410441545 A CN201410441545 A CN 201410441545A CN 104263346 A CN104263346 A CN 104263346A
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- 239000012530 fluid Substances 0.000 title claims abstract description 103
- 238000002360 preparation method Methods 0.000 title claims abstract description 40
- 230000002378 acidificating effect Effects 0.000 title abstract 2
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 58
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 24
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims abstract description 24
- 239000003381 stabilizer Substances 0.000 claims abstract description 24
- 238000004132 cross linking Methods 0.000 claims abstract description 22
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 42
- 239000002253 acid Substances 0.000 claims description 33
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 24
- 239000004971 Cross linker Substances 0.000 claims description 22
- 239000003002 pH adjusting agent Substances 0.000 claims description 21
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 20
- 239000003995 emulsifying agent Substances 0.000 claims description 19
- 239000004160 Ammonium persulphate Substances 0.000 claims description 18
- 235000019395 ammonium persulphate Nutrition 0.000 claims description 18
- 239000002585 base Substances 0.000 claims description 18
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 16
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid group Chemical group C(CC(O)(C(=O)O)CC(=O)O)(=O)O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 229920001059 synthetic polymer Polymers 0.000 claims description 12
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 9
- 238000013019 agitation Methods 0.000 claims description 8
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 8
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 8
- 238000006116 polymerization reaction Methods 0.000 claims description 8
- 230000035484 reaction time Effects 0.000 claims description 8
- 239000001509 sodium citrate Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical group [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 8
- 229940038773 trisodium citrate Drugs 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 7
- CIWBSHSKHKDKBQ-DUZGATOHSA-N D-isoascorbic acid Chemical compound OC[C@@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-DUZGATOHSA-N 0.000 claims description 5
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 5
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 5
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 5
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- 238000005065 mining Methods 0.000 claims description 4
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims description 2
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 2
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 229920002866 paraformaldehyde Polymers 0.000 claims description 2
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 6
- -1 iron ion Chemical class 0.000 abstract description 3
- 239000002562 thickening agent Substances 0.000 abstract description 3
- 229910001870 ammonium persulfate Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 description 18
- 239000003921 oil Substances 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 235000015110 jellies Nutrition 0.000 description 2
- 239000008274 jelly Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229920013818 hydroxypropyl guar gum Polymers 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000001455 metallic ions Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
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- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/665—Compositions based on water or polar solvents containing inorganic compounds
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
-
- 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
- C09K2208/26—Gel breakers other than bacteria or enzymes
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lubricants (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention provides an acidic weighted fracturing fluid and a preparation method and application thereof, wherein the fracturing fluid comprises the following components in percentage by weight: 20 to 30 percent of weighting agent, 0.7 to 0.8 percent of thickening agent, 0.05 to 0.1 percent of pH regulator, 0.1 to 0.25 percent of aldehyde crosslinking agent and 0.005 to 0.015 percent of phenol crosslinking agent; 0.02-0.1% of crosslinking accelerator, 0.2-0.78% of demulsifier SP1690.1, 0.5-1.0% of iron ion stabilizer, 0.05-0.1% of ammonium persulfate, 0.025-0.05% of sodium nitrite and the balance of water; the fracturing fluid disclosed by the invention has the advantages of small damage to the stratum, good gel breaking performance and low cost.
Description
Technical field
The present invention relates to oil-gas field fracturing volume increase field a kind of fracturing liquid used, particularly a kind of weighted fracture fluid of fracturing reform that can be adapted to high pressure, deep-well, ultra deep well, is specifically related to a kind of acid weighted fracture fluid and its preparation method and application.
Background technology
According to data, the oil field in the whole world existing 90% comes to the ripening period, old liberated area production declining; And improving constantly along with degree of prospecting, the oil-gas mining difficulty that geographical conditions were better regional in the past strengthens, the discovery in conventional gas and oil field is also reducing gradually, the scale in new discovery oil field is totally in the trend that diminishes, crude oil equal yield line increases also more weak, and petroleum exploration and development has presented the unfavorable present situation of high cost, low output.In recent years, petroleum exploration and development emphasis to side area, oily district deep layer, complex construction, unconventional producing region, the transfer of the field such as deep-sea.Deep reservoirs transformation is focus and the Technology Difficulties of research in current worldwide.At deep water, ultra-deep layer carries out its difficulty of well stimulation and risk is larger, and subject matter is that infusion pressure is high, and routine work liquid system is difficult to meet, optimization design difficulty, and fracture technology has become the Pinch technology that can restriction ultra-deep compact reservoir effectively be exploited.Generally all weighted fracture fluid is adopted both at home and abroad to the exploitation of this kind of well, namely in fracturing liquid, adds inorganic salt, improve of the fracturing fluid density.
Chinese patent document CN1940009 (application number CN200510105813.8) discloses " a kind of heavy cracking-fluid formula ", and its composition and weight ratio thereof are: water 500; Weighting agent 180 ~ 483; Viscosifying agent hydroxypropylguar gum 2 ~ 3; PH value regulator sodium carbonate 0.8 ~ 1; PH value regulator sodium hydroxide 0.15 ~ 0.27; Cleanup additive 3.0 ~ 3.3.Weighted fracture fluid density 1.25-1.5g/cm
3, fluid column pressure in pit shaft can be increased, reduce well head operation pressure, utilize existing fracturing unit, just can complete deep-well, ultra deep well, surpressure well, the wellfracturing of abnormal high-ground stress well, realize reservoir reconstruction.
Chinese patent document CN102876314A (application number CN201210365913.4) discloses " a kind of weighted fracture fluid ", it is mixed by organic acid salt weighting agent, viscosifying agent, linking agent, pH adjusting agent, cleanup additive, sterilant, clay stabilizer, high-temperature stabiliser, organic salt weighted fracture fluid has wider Auto-regulating System of Density of Heavy Medium scope, at 1.05g/cm
3~ 2.3g/cm
3interior adjustable.
Generally speaking, prior art achieves of the fracturing fluid increasing the weight of to a certain extent, but at present all there is the linking agent that some problems (1) use and be all the metallic-ion crosslinking agent of boron or zirconium and be cross-linked in the basic conditions in system, and inevitable formation produces secondary injury; (2) viscosifying agent used is generally vegetable jelly class, and vegetable jelly water insoluble matter content is high and price volalility is comparatively large, is unfavorable for the long-run development of weighted fracture fluid system.
Summary of the invention
One object of the present invention is to provide a kind of acid weighted fracture fluid; The advantages such as this weighted fracture fluid has Low Damage, heatproof, anti-shearing, easily broken glue, residue content be low;
Another object of the present invention is to the preparation method that described acid weighted fracture fluid is provided;
Another object of the present invention is to provide the application of described acid weighted fracture fluid in oil gas well mining.
For reaching above-mentioned purpose, on the one hand, the invention provides a kind of acid weighted fracture fluid, described fracturing liquid comprises following weight percent composition: weighting agent 20%-30%, viscosifying agent 0.7%-0.8%, pH adjusting agent 0.05%-0.1%, aldehyde crosslinking agent 0.1-0.25%, Phenolic crosslinkers 0.005%-0.015%; Crosslinking accelerator 0.02-0.1%, emulsion splitter 0.1-0.2%, Fe stabilizer 0.5-1.0%, ammonium persulphate 0.05-0.1%, Sodium Nitrite 0.025-0.05%, surplus are water;
Wherein the present invention is preferably: weighting agent 30%, viscosifying agent 0.7%, pH adjusting agent 0.05%, aldehyde crosslinking agent 0.25%, Phenolic crosslinkers 0.015%; Crosslinking accelerator 0.02%, emulsion splitter 0.1%, Fe stabilizer 1.0%, ammonium persulphate 0.05%, Sodium Nitrite 0.025%, surplus are water.
According to fracturing liquid of the present invention, wherein said emulsion splitter can be the emulsion splitter of any routine in this area, and any conventional commercially available emulsion splitter in this area all can be used for the present invention, wherein the present invention's preferably de-emulsifier SP 169.
According to fracturing liquid of the present invention, wherein preferred described weighting agent is selected from least one in Sodium Bromide, sodium-chlor, Repone K and Organic Sodium Salt;
Wherein more preferably described Organic Sodium Salt is Trisodium Citrate.
According to fracturing liquid of the present invention, wherein preferred described viscosifying agent is synthetic polymer, and described synthetic polymer viscosity-average molecular weight is about 1,200 ten thousand.
According to fracturing liquid of the present invention, wherein preferred described synthetic polymer is that acrylamide and 2-acrylamide-2-methyl propane sulfonic are obtained by polyreaction.
According to fracturing liquid of the present invention, wherein the polymerization temperature of further preferred described polyreaction is at 12-20 DEG C, reaction times 3-5 hour.
According to fracturing liquid of the present invention, wherein preferred described pH value regulator is selected from least one in thionamic acid, formic acid and acetic acid.
According to fracturing liquid of the present invention, wherein preferred described aldehyde crosslinking agent is selected from least one in paraformaldehyde, formaldehyde and hexamethylenetetramine.
According to fracturing liquid of the present invention, wherein preferred described Phenolic crosslinkers is selected from least one in Resorcinol, Resorcinol and phenol;
Wherein be more preferably Resorcinol.
According to fracturing liquid of the present invention, wherein preferred described crosslinking accelerator is selected from least one in triethylene diamine, Tetramethyl Ethylene Diamine and tetraethylene pentamine; Wherein more preferably triethylene diamine.
In the present invention, under room temperature (20 DEG C) condition, crosslinking accelerator can promote the common cross-linked polymer of formaldehyde that Phenolic crosslinkers and aldehyde crosslinking agent discharge, and the acid solution gel obtained has complicated reticulated structure, improves the heatproof anti-shear performance of gel.
According to fracturing liquid of the present invention, wherein preferred described Fe stabilizer is citric acid, acetic acid, disodium ethylene diamine tetraacetate, saccharosonic acid; Wherein be more preferably citric acid, acetic acid, disodium ethylene diamine tetraacetate, saccharosonic acid.
On the other hand, the preparation method of any described acid weighted fracture fluid before present invention also offers, described method comprises the steps:
(1) base fluid preparation: be added to the water by weighting agent, Fe stabilizer, pH adjusting agent and de-emulsifier SP 169, under agitation, add viscosifying agent, adding rear continuation and stirs, fully dissolving to making polymkeric substance;
(2) crosslinked fluid preparation: Xiang Shuizhong adds aldehydes, Phenolic crosslinkers and crosslinking accelerator and ammonium persulphate and Sodium Nitrite successively;
(3) acid weighted fracture fluid preparation: be that base fluid and crosslinked fluid carry out being mixed with weighted fracture fluid by 9:1-9.5:1 with mass ratio by base fluid and crosslinked fluid liquid.
According to preparation method of the present invention, wherein preferred weighting agent, pH adjusting agent and de-emulsifier SP 169 is added to the water after, be under the stirring of 400r/min rotating speed, add viscosifying agent.
Wherein viscosifying agent adds speed and can add speed according to viscosifying agent in the similar operations of this area and control, such as controls viscosifying agent and add speed and form " flake " to avoid polymers soln.
According to preparation method of the present invention, continue to stir 2h after wherein preferably adding viscosifying agent.
Another aspect, the application of any described acid weighted fracture fluid in oil gas well mining before present invention also offers;
According to application of the present invention, wherein preferred described acid weighted fracture fluid working temperature is lower than 150 DEG C.
According to application of the present invention, wherein also preferred described Oil/gas Well temperature lower than 150 DEG C.
In sum, the invention provides a kind of acid weighted fracture fluid and its preparation method and application.Acid weighted fracture fluid tool of the present invention has the following advantages:
(1) formation injury is little: by nonmetallic ion linking agent crosslinked thickening agent in acid condition, avoids inorganic metal or organometallic compound to be cross-linked in the basic conditions and inevitably introduces high volence metal ion to stratum and cause stratum secondary injury;
(2) broken colloidality can be good: adopt capsule to break glue technology, can ensure pressing crack construction terminate rear fracturing liquid thoroughly broken glue return row, decrease the harm of formation;
(3) cost is low: synthetic polymer is simple and easy to get, reduces the cost of viscosifying agent.
Accompanying drawing explanation
Fig. 1 is the fracturing liquid resistant to shearing performance (RS-600 rheometer, 170,150 DEG C) when thickener concentration is 0.7%.
Embodiment
Describe the beneficial effect of implementation process of the present invention and generation below by way of specific embodiment in detail, 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.
Embodiment 1
By weighting agent Trisodium Citrate 30%, viscosifying agent, (acrylamide and 2-acrylamide-2-methyl propane sulfonic mass ratio are that 1:1 synthetic polymer viscosity-average molecular weight is about 1,200 ten thousand.Wherein polymerization temperature is at 12 DEG C, reaction times 3-5 hour.) 0.7%, pH adjusting agent thionamic acid 0.05%, aldehyde crosslinking agent hexamethylenetetramine 0.25%, Phenolic crosslinkers Resorcinol 0.015%; The water mixed preparing fracturing liquid of the present invention of crosslinking accelerator triethylene diamine 0.02%, de-emulsifier SP 1690.1%, Fe stabilizer disodium ethylene diamine tetraacetate 1.0%, ammonium persulphate 0.05%, Sodium Nitrite 0.025% and surplus.Its preparation method is:
(1) base fluid preparation: add in 127.3g water by weighting agent 60g, Fe stabilizer 2g, pH adjusting agent 0.1g and de-emulsifier SP 1690.2g, under agitation, slowly add viscosifying agent 1.4g, adding rear continuation and stirs 2h, fully dissolving to making polymkeric substance;
(2) crosslinked fluid preparation: add aldehyde crosslinking agent 0.5g, Phenolic crosslinkers 0.03g and crosslinking accelerator 0.04g and ammonium persulphate 0.1g and Sodium Nitrite 0.05g in 9.28g water successively;
(3) acid weighted fracture fluid preparation: base fluid and crosslinked fluid are carried out being mixed with weighted fracture fluid.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 1.Fracturing liquid resistant to shearing performance as shown in Figure 1.
Table 1 fracturing fluid property evaluation result of the present invention (150 DEG C)
Embodiment 2
By weighting agent Trisodium Citrate 20%, viscosifying agent, (acrylamide and 2-acrylamide-2-methyl propane sulfonic mass ratio are that 1:1 synthetic polymer viscosity-average molecular weight is about 1,200 ten thousand.Polymerization temperature at 12 DEG C, reaction times 3-5 hour.) 0.8%, pH adjusting agent thionamic acid 0.1%, aldehyde crosslinking agent hexamethylenetetramine 0.2%, Phenolic crosslinkers Resorcinol 0.01%; The water mixed preparing fracturing liquid of the present invention of crosslinking accelerator triethylene diamine 0.1%, de-emulsifier SP 1690.1%, Fe stabilizer citric acid 0.5%, ammonium persulphate 0.1%, Sodium Nitrite 0.05% and surplus.
Its preparation method is:
(1) base fluid preparation: add in 138g water by weighting agent 40g, Fe stabilizer 1g, pH adjusting agent 0.2g and de-emulsifier SP 1690.2g, under agitation, slowly add viscosifying agent 0.6g, adding rear continuation and stirs 2h, fully dissolving to making polymkeric substance;
(2) crosslinked fluid preparation: add aldehyde crosslinking agent 0.4g, Phenolic crosslinkers 0.02g and crosslinking accelerator 0.2g and ammonium persulphate 0.2g and Sodium Nitrite 0.1g in 19.08g water successively;
(3) acid weighted fracture fluid preparation: base fluid and crosslinked fluid are carried out being mixed with weighted fracture fluid.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 2.
Table 2 fracturing fluid property evaluation result of the present invention (150 DEG C)
Embodiment 3
By weighting agent Trisodium Citrate 25%, viscosifying agent, (acrylamide and 2-acrylamide-2-methyl propane sulfonic mass ratio are that 1:1 synthetic polymer viscosity-average molecular weight is about 1,200 ten thousand.Polymerization temperature at 12 DEG C, reaction times 3-5 hour.) 0.75%, pH adjusting agent thionamic acid 0.075%, aldehyde crosslinking agent hexamethylenetetramine 0.1%, Phenolic crosslinkers Resorcinol 0.005%; The water mixed preparing fracturing liquid of the present invention of crosslinking accelerator triethylene diamine 0.05%, de-emulsifier SP 1690.2%, ironic acetate ion stabilizer 0.75%, ammonium persulphate 0.1%, Sodium Nitrite 0.025% and surplus.
Its preparation method is:
(1) base fluid preparation: weighting agent 50g, Fe stabilizer 1.5g, pH adjusting agent 0.15g and de-emulsifier SP 1690.4g are added in 126.45g water, under agitation, slowly add viscosifying agent 1.5g, adding rear continuation and stir 2h, fully dissolving to making polymkeric substance;
(2) crosslinked fluid preparation: add aldehyde crosslinking agent 0.2g, Phenolic crosslinkers 0.01g and crosslinking accelerator 0.1g and ammonium persulphate 0.2g and Sodium Nitrite 0.05g in 19.44g water successively;
(3) acid weighted fracture fluid preparation: base fluid and crosslinked fluid are carried out being mixed with weighted fracture fluid.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 3.
Table 3 fracturing fluid property evaluation result of the present invention (150 DEG C)
Embodiment 4
By weighting agent Trisodium Citrate 30%, viscosifying agent, (acrylamide and 2-acrylamide-2-methyl propane sulfonic mass ratio are that 1:1 synthetic polymer viscosity-average molecular weight is about 1,200 ten thousand.Polymerization temperature at 12 DEG C, reaction times 3-5 hour.) 0.7%, pH adjusting agent thionamic acid 0.05%, aldehyde crosslinking agent hexamethylenetetramine 0.1%, Phenolic crosslinkers Resorcinol 0.015%; The water mixed preparing fracturing liquid of the present invention of crosslinking accelerator triethylene diamine 0.05%, de-emulsifier SP 1690.2%, saccharosonic acid Fe stabilizer 1.0%, ammonium persulphate 0.05%, Sodium Nitrite 0.05% and surplus.
Its preparation method is:
(1) base fluid preparation: add in 116.1g water by weighting agent 60g, Fe stabilizer 2g, pH adjusting agent 0.1g and de-emulsifier SP 1690.4g, under agitation, slowly add viscosifying agent 1.4g, adding rear continuation and stirs 2h, fully dissolving to making polymkeric substance;
(2) crosslinked fluid preparation: add aldehyde crosslinking agent 0.2g, Phenolic crosslinkers 0.03g and crosslinking accelerator 0.1g and ammonium persulphate 0.1g and Sodium Nitrite 0.1g in 19.47g water successively;
(3) acid weighted fracture fluid preparation: base fluid and crosslinked fluid are carried out being mixed with weighted fracture fluid.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 4.
Table 4 fracturing fluid property evaluation result of the present invention (150 DEG C)
Embodiment 5
By weighting agent Trisodium Citrate 30%, viscosifying agent, (acrylamide and 2-acrylamide-2-methyl propane sulfonic mass ratio are that 1:1 synthetic polymer viscosity-average molecular weight is about 1,200 ten thousand.Polymerization temperature at 12 DEG C, reaction times 3-5 hour.) 0.75%, pH adjusting agent thionamic acid 0.1%, aldehyde crosslinking agent hexamethylenetetramine 0.2%, Phenolic crosslinkers Resorcinol 0.01%; The water mixed preparing fracturing liquid of the present invention of crosslinking accelerator triethylene diamine 0.1%, de-emulsifier SP 1690.15%, saccharosonic acid Fe stabilizer 0.75%, ammonium persulphate 0.1%, Sodium Nitrite 0.025% and surplus.
Its preparation method is:
(1) base fluid preparation: add in 126.5g water by weighting agent 60g, Fe stabilizer 1.5g, pH adjusting agent 0.2g and de-emulsifier SP 1690.3g, under agitation, slowly add viscosifying agent 1.5g, adding rear continuation and stirs 2h, fully dissolving to making polymkeric substance;
(2) crosslinked fluid preparation: add aldehyde crosslinking agent 0.4g, Phenolic crosslinkers 0.02g and crosslinking accelerator 0.2g and ammonium persulphate 0.2g and Sodium Nitrite 0.05g in 9.13g water successively;
(3) acid weighted fracture fluid preparation: base fluid and crosslinked fluid are carried out being mixed with weighted fracture fluid.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 5.
Table 5 fracturing fluid property evaluation result of the present invention (150 DEG C)
Embodiment 6
By weighting agent Trisodium Citrate 30%, viscosifying agent, (acrylamide and 2-acrylamide-2-methyl propane sulfonic mass ratio are that 1:1 synthetic polymer viscosity-average molecular weight is about 1,200 ten thousand.Polymerization temperature at 12 DEG C, reaction times 3-5 hour.) 0.75%, pH adjusting agent thionamic acid 0.1%, aldehyde crosslinking agent hexamethylenetetramine 0.2%, Phenolic crosslinkers Resorcinol 0.01%; The water mixed preparing fracturing liquid of the present invention of crosslinking accelerator triethylene diamine 0.05%, de-emulsifier SP 1690.15%, ironic citrate ion stabilizer 0.75%, ammonium persulphate 0.075%, Sodium Nitrite 0.05% and surplus.
Its preparation method is:
(1) base fluid preparation: add in 116.5g water by weighting agent 60g, Fe stabilizer 1.5g, pH adjusting agent 0.2g and de-emulsifier SP 1690.3g, under agitation, slowly add viscosifying agent 1.5g, adding rear continuation and stirs 2h, fully dissolving to making polymkeric substance;
(2) crosslinked fluid preparation: add aldehyde crosslinking agent 0.4g, Phenolic crosslinkers 0.02g and crosslinking accelerator 0.1g and ammonium persulphate 0.15g and Sodium Nitrite 0.1g in 19.23g water successively;
(3) acid weighted fracture fluid preparation: base fluid and crosslinked fluid are carried out being mixed with weighted fracture fluid.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 6.
Table 6 fracturing fluid property evaluation result of the present invention (150 DEG C)
Comparative example 1
According to embodiment 1 method preparing fracturing fluid, difference is only that Phenolic crosslinkers consumption is 0, and aldehyde crosslinking agent consumption is 0.3%.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 7.
Table 7 fracturing fluid property evaluation result of the present invention (150 DEG C)
Comparative example 2
According to embodiment 1 method preparing fracturing fluid, difference is only that aldehyde crosslinking agent consumption is acetaldehyde.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 8.
Table 8 fracturing fluid property evaluation result of the present invention (150 DEG C)
Comparative example 3
According to embodiment 1 method preparing fracturing fluid, difference is only that Sodium Nitrite consumption is 0.
Performance evaluation is carried out to fracturing liquid.Measure according to oil and gas industry standard SY/T 5107-2005 " aqueous fracturing fluid method of evaluating performance ", result is as table 9.
Table 9 fracturing fluid property evaluation result of the present invention (150 DEG C)
Claims (10)
1. an acid weighted fracture fluid, it is characterized in that, described fracturing liquid comprises following weight percent composition: weighting agent 20%-30%, viscosifying agent 0.7%-0.8%, pH adjusting agent 0.05%-0.1%, aldehyde crosslinking agent 0.1-0.25%, Phenolic crosslinkers 0.005%-0.015%; Crosslinking accelerator 0.02-0.1%, de-emulsifier SP 1690.1-0.2%, Fe stabilizer 0.5-1.0%, ammonium persulphate 0.05-0.1%, Sodium Nitrite 0.025-0.05%, surplus are water; Wherein be preferably weighting agent 30%, viscosifying agent 0.7%, pH adjusting agent 0.05%, aldehyde crosslinking agent 0.25%, Phenolic crosslinkers 0.015%; Crosslinking accelerator 0.02%, emulsion splitter 0.1%, Fe stabilizer 1.0%, ammonium persulphate 0.05%, Sodium Nitrite 0.025%, surplus are water; Wherein preferably emulsion splitter is de-emulsifier SP 169.
2. fracturing liquid according to claim 1, is characterized in that, described weighting agent is selected from least one in Sodium Bromide, sodium-chlor, Repone K and Organic Sodium Salt; Wherein preferred described Organic Sodium Salt is Trisodium Citrate.
3. fracturing liquid according to claim 1, is characterized in that, described viscosifying agent is synthetic polymer: acrylamide and 2-acrylamide-2-methyl propane sulfonic are obtained by polyreaction, and described synthetic polymer viscosity-average molecular weight is about 1,200 ten thousand; Wherein preferably acrylamide and 2-acrylamide-2-methyl propane sulfonic mass ratio are 1:1; Wherein the polymerization temperature of further preferred described polyreaction is at 12-20 DEG C, reaction times 3-5 hour.
4. fracturing liquid according to claim 1, is characterized in that, described pH value regulator is selected from least one in thionamic acid, formic acid and acetic acid.
5. fracturing liquid according to claim 1, is characterized in that, described aldehyde crosslinking agent is selected from least one in paraformaldehyde, formaldehyde and hexamethylenetetramine.
6. fracturing liquid according to claim 1, is characterized in that, described Phenolic crosslinkers is selected from least one in Resorcinol, Resorcinol and phenol, wherein preferred Resorcinol.
7. fracturing liquid according to claim 1, is characterized in that, described crosslinking accelerator is selected from least one in triethylene diamine, Tetramethyl Ethylene Diamine and tetraethylene pentamine; Wherein preferred triethylene diamine.
8. fracturing liquid according to claim 1, is characterized in that, described Fe stabilizer is selected from citric acid, acetic acid, disodium ethylene diamine tetraacetate, saccharosonic acid; Wherein preferred disodium ethylene diamine tetraacetate.
9. the preparation method of acid weighted fracture fluid described in claim 1 ~ 8 any one, is characterized in that, described method comprises the steps:
(1) base fluid preparation: be added to the water by weighting agent, Fe stabilizer, pH adjusting agent and de-emulsifier SP 169, under agitation, slowly add viscosifying agent, adds rear continuation and stirs, preferably stirring 2h, fully dissolving to making polymkeric substance; Also preferred weighting agent, Fe stabilizer, pH adjusting agent and de-emulsifier SP 169 is added to the water after, be under the stirring of 400r/min rotating speed, add viscosifying agent;
(2) crosslinked fluid preparation: Xiang Shuizhong adds aldehydes, Phenolic crosslinkers and crosslinking accelerator and ammonium persulphate and Sodium Nitrite successively;
(3) acid weighted fracture fluid preparation: with mass ratio 9:1-9.5:1, base fluid and crosslinked fluid are carried out being mixed with weighted fracture fluid by base fluid and crosslinked fluid liquid mass.
10. the application of acid weighted fracture fluid in oil gas well mining described in claim 1 ~ 8 any one; Wherein preferred described acid weighted fracture fluid working temperature is lower than 150 DEG C.
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