CN103881690A - Plant gum fracturing fluid and method for recycling flow-back fluid of plant gum fracturing fluid - Google Patents
Plant gum fracturing fluid and method for recycling flow-back fluid of plant gum fracturing fluid Download PDFInfo
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- CN103881690A CN103881690A CN201410094305.3A CN201410094305A CN103881690A CN 103881690 A CN103881690 A CN 103881690A CN 201410094305 A CN201410094305 A CN 201410094305A CN 103881690 A CN103881690 A CN 103881690A
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- Prior art keywords
- discharge opeing
- fracturing
- return
- fracturing fluid
- liquid
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- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 4
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- VPTUPAVOBUEXMZ-UHFFFAOYSA-N (1-hydroxy-2-phosphonoethyl)phosphonic acid Chemical compound OP(=O)(O)C(O)CP(O)(O)=O VPTUPAVOBUEXMZ-UHFFFAOYSA-N 0.000 claims description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 2
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- FOGYNLXERPKEGN-UHFFFAOYSA-N 3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfopropyl)phenoxy]propane-1-sulfonic acid Chemical compound COC1=CC=CC(CC(CS(O)(=O)=O)OC=2C(=CC(CCCS(O)(=O)=O)=CC=2)OC)=C1O FOGYNLXERPKEGN-UHFFFAOYSA-N 0.000 claims description 2
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- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 claims description 2
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- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims description 2
- 239000013543 active substance Substances 0.000 claims description 2
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- BOOMOFPAGCSKKE-UHFFFAOYSA-N butane-2-sulfonic acid;prop-2-enamide Chemical compound NC(=O)C=C.CCC(C)S(O)(=O)=O BOOMOFPAGCSKKE-UHFFFAOYSA-N 0.000 claims description 2
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 2
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- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 claims description 2
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- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
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- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 2
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- C—CHEMISTRY; METALLURGY
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- 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
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- 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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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- 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
- C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
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- 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
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- 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
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- 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
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- C09K8/60—Compositions for stimulating production by acting on the underground formation
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
The invention discloses plant gum fracturing fluid and a method for recycling flow-back fluid of the plant gum fracturing fluid. The method for recycling the flow-back fluid of the plant gum fracturing fluid comprises the steps of firstly, preparing 99.82-61.2 parts of clean water, 0.15-0.8 part of hybrid fenugreek gelatin powder, 0-1.0 part of a crude oil demulsifier, 0-2.0 parts of a discharge aiding agent, 0-2.0 parts of a foaming agent, 0-1.0 part of a sterilizing agent, 0-2.0 parts of a clay stabilizer, 0-10.0 parts of a pH value regulator and 0.03-20.0 parts of borate into clean water based fracturing fluid, and then performing fracturing construction; then, separating crude oil and solid-phase particles in the fracturing fluid after fracturing construction to obtain a low-back fluid clear solution; preparing 20-99.98 parts of the low-back fluid clear solution, 0-36.2 parts of clean water, 0.01-5.0 parts of a calcium-magnesium shielding agent, 0-0.8 part of the hybrid fenugreek gelatin powder, 0-1.0 part of the crude oil demulsifier, 0-2.0 parts of the discharge aiding agent, 0-2.0 parts of the foaming agent, 0-1.0 part of the sterilizing agent, 0-2.0 parts of the clay stabilizer, 0.01-10.0 parts of the pH value regulator and 0-20.0 parts of borate into flow-back fluid based fracturing fluid, and performing fracturing construction again; finally, continuously recycling the flow-back fluid after fracturing according to the proportion of the flow-back fluid based fracturing fluid.
Description
technical field
The present invention relates to a kind ofly comprise the fracturing liquid that shale gas and CBM Fracturing yield-increasing technique use and the recovery field of returning discharge opeing thereof for Oil/gas Well, is that to hybridize Semen Trigonellae rubber powder be a kind of plant gum fracturing fluid of thickening material and the method for returning discharge opeing recycle thereof specifically.
Background technology
In well fracturing transformation process, the fracturing liquid that prior art is used be mainly taking macromolecule plant glue if guar gum and derivative thereof are as the fracturing liquid of thickening material, the shortcoming that ubiquity is following:
1, owing to must using gel breaker in fracturing liquid, gel breaker is reducing all the time of the fracturing fluid viscosity in fracturing process, affects the reliability of construction.
2, the filter cake that fracturing liquid forms in stratum and around concentrated solution can not break glue or only have the broken glue of part, in the supporting crack of stratum, easy residual polymer, causes serious pollution to supporting crack.
3, fracturing liquid must return and drain into ground after pressing crack construction completes, and the liquid of the row of returning can not be used again, if it is not effectively processed, easily to environment.
" low-molecular environmentally-friendly fracturing fluid and the application of reclaiming liquid thereof " that patent No. ZL 200510042832.0 introduces, its technical scheme be positioned at 1 × 105-4 × 105 taking molecular weight guar gum, sesbania gum, fenugreek gum and their derivative as thickening material, taking the organic or inorganic compound of boron as linking agent, the crosslinked fracturing liquid forming, makes fracturing fluid system be degraded to short molecular chain and realizes the row of returning by the intrinsic pH value environment in stratum on stratum; Return discharge opeing after separating, utilize that to be no more than the alkaline matter such as sodium hydroxide, sodium carbonate or sodium bicarbonate of 2 parts be PH conditioning agent, return the pH value of discharge opeing by raising again to form fracturing liquid.
Summary of the invention
The object of the present invention is to provide to hybridize Semen Trigonellae rubber powder carries out a kind of plant gum fracturing fluid of recycling as thickening material, the fracturing outlet liquid that can drain into returning ground and returns a kind of plant gum fracturing fluid of recycle of discharge opeing and return the method for discharge opeing recycle.
Technical scheme of the present invention is achieved in that
A kind of plant gum fracturing fluid is provided and returns the method for discharge opeing recycle, it is characterized in that: its fracturing liquid is divided into clearly aqueous fracturing fluid and returns discharge opeing base fracturing liquid;
Described clear aqueous fracturing fluid is the mixture with following composition and weight part:
Clear water: 99.82～61.2 parts
Hybridization Semen Trigonellae rubber powder: 0.15～0.8 part
Boric acid ester: 0.03～20.0 part
Crude oil demulsifier: 0～1.0 part
Cleanup additive: 0～2.0 part
Pore forming material: 0～2.0 part
Sterilant: 0～1.0 part
Clay stabilizer: 0～2.0 part
PH adjusting agent: 0～10.0 part
The described discharge opeing base fracturing liquid that returns is the mixture with following composition and weight part:
Return discharge opeing clear liquid: 99.98～20 parts
Clear water: 0～36.2 part
Calcium magnesium screener: 0.01～5.0 part
PH adjusting agent: 0.01～10.0 part
Semen Trigonellae rubber powder: 0～0.8 part
Crude oil demulsifier: 0～1.0 part
Cleanup additive: 0～2.0 part
Pore forming material: 0～2.0 part
Sterilant: 0～1.0 part
Clay stabilizer: 0～2.0 part
Boric acid ester: 0～20.0 part
Above-mentioned clear aqueous fracturing fluid refers to uses fracturing liquid used without pressure break, the preparation taking cleaning water as solvent.
The above-mentioned fracturing liquid that returns discharge opeing base fracturing liquid and refer to the fracturing outlet liquid clear liquid preparation that utilizes pressure break to return to clear liquid or diluted with clear water.
Above-mentioned hybridization Semen Trigonellae rubber powder derives from the endosperm of the hybridization product taking Semen Trigonellae as female parent, taking guar-bean as male parent, and its molecular weight is between 2 × 105-3 × 105, and its molecular structural formula is:
Wherein n value is: 100≤n≤150
The above-mentioned boric acid ester boric acid ester that to be boric acid form with the organic compound that contains 2 above-OH groups.
Above-mentioned pH adjusting agent is mixture and the aqueous solution that any one or the arbitrary combination in them in ammoniacal liquor or potassium hydroxide or sodium hydroxide or sodium carbonate or sodium bicarbonate or tertiary sodium phosphate inorganic base or Monoethanolamine MEA BASF or trolamine or methane amide or ethanamide organic amine forms.
Above-mentioned calcium magnesium screener refer to tripoly phosphate sodium STPP or Potassium tripolyphosphate or Sodium hexametaphosphate 99 or hexa metaphosphoric acid potassium or EDTA or different anti-hematic acid or different anti-hematic acid sodium or citric acid or Trisodium Citrate or gluconic acid or Sunmorl N 60S or hydroxy ethylene diphosphonic acid or Amino Trimethylene Phosphonic Acid or polyacrylic acid or sodium polyacrylate or polyacrylic acid potassium or hydrolysis maleic anhydride or vinylformic acid/methyl acrylate copolymer or vinylformic acid/Propylene glycol monoacrylate/methyl acrylate terpolymer or acrylic acid/acrylamide methyl propane sulfonic acid/Hypophosporous Acid, 50 terpolymer or sodium lignosulfonate or lignosulfonic acid potassium or, any one or arbitrary combination in them in tannin and the mixture and the aqueous solution that form.
Above-mentioned crude oil demulsifier refers to alkyl polymerization ethers or alkyl polymerization alcohols or alkyl sulfonates or alkylsurfuric acid salt compounds and the arbitrary combination in them and the mixture and the aqueous solution that form.
Above-mentioned cleanup additive refers to polyoxyethylene alkylphenol or peregal or alkylsulfonate or alkyl-sulphate and the arbitrary combination in them and the mixture that forms.
Above-mentioned pore forming material refers to the quaternary amine tensio-active agent of carbon atoms 12-18.
Above-mentioned sterilant refers to any one or the arbitrary combination in them in formaldehyde or glutaraldehyde or 12-16 alkyl benzyl ammonium chloride or 12-16 alkyl benzyl brometo de amonio and the mixture and the aqueous solution that form.
Above-mentioned clay stabilizer is the material that can reduce clay swelling and migration, as any one or arbitrary combination in them of ammonium chloride or sodium-chlor or Repone K or calcium chloride or magnesium chloride or cationic quaternary ammonium salt or cationic quaternary ammonium salt polymkeric substance and the mixture and the aqueous solution that form.
The above-mentioned discharge opeing clear liquid that returns is to adopt settling process or filtration method that the crude oil in fracturing outlet liquid is separated with solid phase particles, the clear liquid obtaining.
The difference of " low-molecular environmentally-friendly fracturing fluid and the application of reclaiming liquid thereof " that the present invention and patent No. ZL 200510042832.0 introduce is:
1, patent No. ZL 200510042832.0 thickening material used is guar gum, sesbania gum, fenugreek gum and their derivative that molecular weight is positioned at 1 × 105-4 × 105; And the present invention adopts a kind of hybridization combination of fenugreek gum and derivative thereof, this hybridization combination of fenugreek gum derives from the endosperm of the hybridization product taking Semen Trigonellae as female parent, taking guar-bean as male parent, its good characteristic, molecular weight that combines combination of fenugreek gum and guar gum is between 2 × 105-3 × 105, and its molecular structural formula is:
Wherein n value is: 100≤n≤150
3, the crosslinked fracturing liquid that patent No. ZL 200510042832.0 forms, makes fracturing fluid system be degraded to short molecular chain and realizes the row of returning by the intrinsic pH value environment in stratum on stratum.
And the boric acid ester that the present invention adopts boric acid and poly-hydroxy organism to form is linking agent, linking agent can progressively be hydrolyzed and discharge acidic substance to reduce of the fracturing fluid pH value after the crosslinked fracturing liquid of alkalescence enters stratum, makes boron cross-linking system weaken or destroy.Meanwhile, the present invention, by utilizing calcium ions and magnesium ions and thickening material in stratum to form plane, non-netted complexing, repels the cross-linked network effect of boron and thickening material; Along with linking agent hydrolysis in fracturing liquid weakens the crosslinked action of the reduction of of the fracturing fluid pH value, boron and thickening material, the complex ability of calcium magnesium is greater than gradually the crosslinked action of boron and replaces boron and being cross-linked of thickening material.Can complete of the fracturing fluid broken glue by the effect of this two aspect.
4, patent No. ZL 200510042832.0 adopt by after returning discharge opeing and separating, utilize that to be no more than the alkaline matter such as sodium hydroxide, sodium carbonate or sodium bicarbonate of 2 parts be PH conditioning agent, return the pH value of discharge opeing by raising again to form fracturing liquid.There is comparatively serious defect in this technology: owing to can containing calcium ions and magnesium ions in various degree after fracturing fluid recovery (backflow), in the time that calcium ions and magnesium ions reaches certain concentration, add above-mentioned PH conditioning agent can produce precipitation, especially after entering stratum, temperature rising, can become even more serious, thereby of the fracturing fluid performance is exerted an influence, even stratum produced to serious pollution.
And in the present invention, proposed return in discharge opeing calcium ions and magnesium ions concentration and then add targetedly the calcium magnesium screener of respective concentration according to calcium ions and magnesium ions concentration by detection, with the injury of calcium-magnesium removing on of the fracturing fluid impact and stratum that disappear.
5, patent No. ZL 200510042832.0 will return after discharge opeing separates and directly drop into and recycle, and not consider after the dilution of stratum absorption, local water, aspect effective content, very big variation can occur after fracturing liquid rubber-breaking.
Because the hydrocarbon zone that much need to carry out fracturing reform contains local water, by to oil-gas field waterfrac treatment return discharge opeing analytical results show, return the discharge opeing of returning ejecting through earth formation deep, thickener concentration wherein can exist different concns decline, some returns discharge opeing and only enters before stratum of the fracturing fluid below 20%.Following table is the discharge opeing of returning after the part well pressing crack construction of long celebrating oil field, and the row of returning leads high the more than 5 times of working fluid that reach, and illustrates that returning local water to the major general's thickening material containing in discharge opeing has diluted more than 5 times.
| Pound sign | Working fluid amount m 3 | Return lifting rate m 3 | The row of returning leads % |
| In 66-25 | 23.1 | 107.8 | 466.7 |
| In 66-26 | 28.4 | 147.8 | 520.4 |
| In 66-27 | 28.9 | 144.8 | 501.0 |
| West 19 | 152.4 | 156.4 | 102.6 |
| Fill in 128 wells | 79.8 | 133.6 | 167.4 |
| In 37 | 106.8 | 122.4 | 114.6 |
| Wang106-34Jing | 90 | 120.2 | 133.6 |
And above-mentioned this lower concentration return technology that discharge opeing adopts patent No. ZL 200510042832.0 be cannot form again of the fracturing fluid.And the present invention has increased detection and supplementary technology to returning discharge opeing, thereby can more effectively ensure the performance of returning discharge opeing preparing fracturing fluid.
The present invention provides environmentally-friendly fracturing fluid simultaneously and returns preparation and the circulation utilization method of discharge opeing, it is characterized in that: return discharge opeing base fracturing liquid for pressing crack construction by the described clear aqueous fracturing fluid with clear water preparation or described in returning that discharge opeing prepares, then the discharge opeing of returning after construction is separated, the discharge opeing clear liquid that returns after separation is mixed with and returns discharge opeing base fracturing liquid again for pressing crack construction after detecting, supplementing.Can make fracturing fluid recovery (backflow) liquid iterative cycles use according to this kind of scheme.
Its production process is:
1, the of the fracturing fluid preparation of clear water base
The of the fracturing fluid preparation process of clear water base is:
According to the of the fracturing fluid proportioning of above-mentioned clear water base, hybridization Semen Trigonellae rubber powder is evenly added to the water, after adding, add respectively again crude oil demulsifier, cleanup additive, pore forming material, sterilant, clay stabilizer, pH adjusting agent, then mix and be aqueous fracturing fluid base fluid clearly.
When pressing crack construction, by said ratio, required boric acid ester is mixed and forms clear aqueous fracturing fluid for pressing crack construction with clear aqueous fracturing fluid base fluid at the scene.
2, return the preparation of discharge opeing clear liquid
Adopt settling process or filtration method that the crude oil in fracturing outlet liquid is separated with solid phase particles, the clear liquid obtaining is for returning discharge opeing clear liquid.
Return that discharge opeing clear liquid was both can be from the clear water base " 1, the of the fracturing fluid preparation of clear water base " described of the fracturing fluid returns discharge opeing, also can be from below " 5.2 return the of the fracturing fluid preparation of discharge opeing base " described returning discharge opeing base is of the fracturing fluid returns discharge opeing.
3, from the detection of clear water base fracturing fluid recovery (backflow) liquid clear liquid
The test item that returns discharge opeing clear liquid is divided into: a, calcium magnesium total content " A "; B, hybridization Semen Trigonellae rubber powder concentration " B "; C, other chemical agent concentration " C ".
The detection operating process of a, calcium-magnesium content " A " is:
Press SY/T 5523-2006 " water of oil-gas field analytical procedure " and analyze calcium magnesium total content in fracturing liquid water, calcium magnesium total content " A " is scaled the metering of " mg/ml " unit.
The detection operating process of b, hybridization Semen Trigonellae rubber powder concentration " B " is:
Adopt capillary viscosity agent to measure the viscosity of returning discharge opeing, with reference to the accompanying drawings 1: the relation of Semen Trigonellae rubber powder typical concentrations " the clear aqueous fracturing fluid base fluid viscosity with ", by under immediate, approximate viscosity clearly in aqueous fracturing fluid base fluid the concentration of Semen Trigonellae rubber powder be considered as returning Semen Trigonellae rubber powder concentration " B " in discharge opeing.
The detection operating process of c, other chemical agent concentration " C " is:
The concentration of returning Semen Trigonellae rubber powder concentration " B " in discharge opeing and calculate other chemical agent of measuring according to above-mentioned " b ", calculation formula is:
Wherein:
Y is the concentration of contained Semen Trigonellae rubber powder in the front clear aqueous fracturing fluid base fluid used of pressure break;
D is the related concentrations of other chemical agent in the front clear aqueous fracturing fluid base fluid used of pressure break;
Described other chemical agent refers to crude oil demulsifier, cleanup additive, pore forming material, sterilant, clay stabilizer, boric acid ester; And the concentration of pH adjusting agent is considered as to 0.
4, from the detection of returning discharge opeing base fracturing fluid recovery (backflow) liquid clear liquid
The test item that returns discharge opeing clear liquid is divided into: e, calcium magnesium total content " E "; F, hybridization Semen Trigonellae rubber powder concentration " F "; G, other chemical agent concentration " G ".
The detection operating process of e, calcium-magnesium content " E " is:
Press SY/T 5523-2006 " water of oil-gas field analytical procedure " and analyze calcium magnesium total content in fracturing liquid water, calcium magnesium total content " E " is scaled the metering of " mg/ml " unit.
The detection operating process of f, hybridization Semen Trigonellae rubber powder concentration " F " is:
Adopt capillary viscosity agent to measure the viscosity of returning discharge opeing, and with the clear aqueous fracturing fluid base fluid viscosity contrast of different concns, be considered as returning by the concentration of hybridizing Semen Trigonellae rubber powder in clear aqueous fracturing fluid base fluid under immediate, approximate viscosity and in discharge opeing, hybridize Semen Trigonellae rubber powder concentration " F ".
The detection operating process of g, other chemical agent concentration " G " is:
Returning of measuring according to above-mentioned " f " hybridized Semen Trigonellae rubber powder concentration " F " in discharge opeing and calculates the concentration of other chemical agent, and calculation formula is:
Wherein:
Z is the concentration of returning contained hybridization Semen Trigonellae rubber powder in discharge opeing base fracturing liquid base fluid used before pressure break;
H is the related concentrations of returning other chemical agent in discharge opeing base fracturing liquid base fluid used before pressure break;
Described other chemical agent refers to crude oil demulsifier, cleanup additive, pore forming material, sterilant, clay stabilizer, boric acid ester; And the concentration of pH adjusting agent, calcium magnesium screener is considered as to 0.
5, return the supplementary of discharge opeing and return the of the fracturing fluid preparation of discharge opeing base
Return the supplementary of discharge opeing and return the of the fracturing fluid preparation process of discharge opeing base and be:
5.1 return discharge opeing supplementary required relevant chemical agent dosage determine:
According to the calcium magnesium total content " E " of measuring in the calcium magnesium total content " A " of measuring in aforementioned " 3, from the detection of clear water base fracturing fluid recovery (backflow) liquid clear liquid " or " 4, from the detection of returning discharge opeing base fracturing fluid recovery (backflow) liquid clear liquid ", by the 0.2A-0.5A% of " returning discharge opeing clear liquid+clear water " total quantity or the dosage of 0.2E-0.5E% Determination of quantity calcium magnesium screener;
According to the calcium magnesium total content " E " of measuring in the calcium magnesium total content " A " of measuring in aforementioned " 3, from the detection of clear water base fracturing fluid recovery (backflow) liquid clear liquid " or " 4, from the detection of returning discharge opeing base fracturing fluid recovery (backflow) liquid clear liquid ", by the 0.01A-0.2A% of " returning discharge opeing clear liquid+clear water " total quantity or the dosage of 0.01E-0.2E% Determination of quantity pH adjusting agent;
According to the hybridization Semen Trigonellae rubber powder concentration " F " of measuring in the hybridization Semen Trigonellae rubber powder concentration " B " of measuring in aforementioned " 3, from the detection of clear water base fracturing fluid recovery (backflow) liquid clear liquid " or " 4, from the detection of returning discharge opeing base fracturing fluid recovery (backflow) liquid clear liquid ", determine hybridization Semen Trigonellae rubber powder concentration is supplemented to the dosage that returns discharge opeing base fracturing liquid design concentration;
According to other chemical agent concentration " G " of measuring in other chemical agent concentration " C " of measuring in aforementioned " 3, from the detection of clear water base fracturing fluid recovery (backflow) liquid clear liquid " or " 4, from the detection of returning discharge opeing base fracturing fluid recovery (backflow) liquid clear liquid ", determine other chemical agent concentration is supplemented to the relevant dosage that returns discharge opeing base fracturing liquid design concentration;
Described other chemical agent refers to crude oil demulsifier, cleanup additive, pore forming material, sterilant, clay stabilizer, boric acid ester.
5.2 return the of the fracturing fluid preparation of discharge opeing base
Aforementioned " 5.1 " determined calcium magnesium screener is added to return in discharge opeing and mixes afterwards, then aforementioned " 5.1 " determined hybridization Semen Trigonellae rubber powder is added to the water, after adding, add respectively more aforementioned " 5.1 " determined crude oil demulsifier, cleanup additive, pore forming material, sterilant, clay stabilizer, pH adjusting agent, after adding, mix to be and return discharge opeing base fracturing liquid base fluid.
At the scene when pressing crack construction, by aforementioned " 5.1 " determined boric acid ester with return discharge opeing base fracturing liquid base fluid and be mixed in proportion and form and return discharge opeing base fracturing liquid for pressing crack construction.
The present invention compares with respect to existing vegetable jelly class fracturing liquid technology, has following advantage:
1, the hydrolysis of the contained linking agent of fracturing liquid dependence self and stratum calcium ions and magnesium ions are realized broken glue, without using gel breaker.
2, fracturing liquid has been avoided lasting viscosity reduction in the pumping procedure of pressing crack construction, has highly stable heatproof and anti-shear performance.
3, fracturing liquid forms at stratum supporting crack wall filter cake and concentrated solution can destroy automatically, can keep the unimpeded of supporting crack wall, improve fracturing yield increasing effect.
4, fracturing fluid recovery (backflow) liquid can use by iterative cycles, has reduced discharging of waste liquid and environmental pollution, has saved water resources and chemical additive.
Brief description of the drawings
Fig. 1 is process flow sheet of the present invention.
Fig. 2 is the clear aqueous fracturing fluid base fluid of the present invention viscosity and the graph of relation of hybridizing Semen Trigonellae rubber powder typical concentrations.
Embodiment
, set forth enforcement case of the present invention below, but be not limited to described embodiment:
Shown in Fig. 1, total volume is in 1000m3 container, to add 980m3 water at the scene, start vacuum jet pump circulation, slowly add 3000 Kg hybridization Semen Trigonellae rubber powders by jet-pump suction port, then add respectively 500Kg crude oil demulsifier, 3000Kg cleanup additive, 1000Kg sterilant, 5000Kg clay stabilizer, continue to be circulated to liquid mixing abundant, form the clear aqueous fracturing fluid base fluid L1-1 that hybridization Semen Trigonellae rubber powder concentration is 0.3%.
When the 1st pressing crack construction, in infusion solution L1-1,6000Kg boric acid ester is mixed and forms clear aqueous fracturing fluid and carry out fracturing reform for 100 DEG C of well temperature with interior oil reservoir with the ratio of " base fluid L1-1: boric acid ester=100Kg:0.6Kg " with base fluid L1-1.
The 1st time post-fracturing fracturing outlet liquid is 820 m3.To return discharge opeing settlement separation tank and carry out oil removing, desanding, isolate the most crude oil in top and bottom silt particle, determine that 800 m3 that collect are returned to discharge opeing clear liquid to be supplemented to containing 0.3% hybridization Semen Trigonellae rubber powder concentration and to carry out wellfracturing next time.The design concentration of hybridization Semen Trigonellae rubber powder and relevant chemical agent is in " design concentration " in Table 1-1.By detecting returning discharge opeing clear liquid, detect and need supplementary calculation result in Table 1-1:
Table 1-1:
The magnitude of recruitment calculating according to table 1-1, by 2016 Kg calcium magnesium screeners be added to 800 m3 return in discharge opeing clear liquid after cycle balance, start vacuum jet pump circulation, slowly add 1520 Kg hybridization Semen Trigonellae rubber powders by jet-pump suction port, then add respectively 256Kg crude oil demulsifier, 1520Kg cleanup additive, 504Kg sterilant, 2536Kg clay stabilizer, 504Kg pH adjusting agent, continue to be circulated to liquid mixing abundant, what formation hybridization Semen Trigonellae rubber powder concentration was 0.3% returns discharge opeing base fracturing liquid base fluid L1-2.
When the 2nd pressing crack construction, in infusion base fluid L1-2,3040 Kg boric acid esters are mixed with the ratio of " base fluid L1-2: boric acid ester=100Kg:0.38Kg " with base fluid L1-2 and form and return discharge opeing base fracturing liquid and carry out fracturing reform for 100 DEG C of well temperature with interior oil reservoir.
The 2nd time post-fracturing fracturing outlet liquid is 520 m3.To return discharge opeing settlement separation tank and carry out oil removing, desanding, isolate the most crude oil in top and bottom silt particle, determine that 500 m3 that collect are returned to discharge opeing clear liquid to be supplemented to containing 0.3% hybridization Semen Trigonellae rubber powder concentration and to carry out wellfracturing next time.The design concentration of hybridization Semen Trigonellae rubber powder and relevant chemical agent is in " design concentration " in Table 1-2.By detecting returning discharge opeing clear liquid, detect and need supplementary calculation result in Table 1-2:
Table 1-2:
The magnitude of recruitment calculating according to table 1-2, by 2550 Kg calcium magnesium screeners be added to 500 m3 return in discharge opeing clear liquid after cycle balance, start vacuum jet pump circulation, slowly add 975 Kg hybridization Semen Trigonellae rubber powders by jet-pump suction port, then add respectively 162.5Kg crude oil demulsifier, 975Kg cleanup additive, 325Kg sterilant, 1625Kg clay stabilizer, 680Kg pH adjusting agent, continue to be circulated to liquid mixing abundant, what formation hybridization Semen Trigonellae rubber powder concentration was 0.3% returns discharge opeing base fracturing liquid base fluid L1-3.
When the 3rd pressing crack construction, in infusion base fluid L1-3,1950 Kg boric acid esters are mixed with the ratio of " base fluid L1-3: boric acid ester=100Kg:0.39Kg " with base fluid L1-3 and form and return discharge opeing base fracturing liquid and carry out fracturing reform for 100 DEG C of well temperature with interior oil reservoir.
The 3rd time post-fracturing fracturing outlet liquid is 320 m3.To return discharge opeing settlement separation tank and carry out oil removing, desanding, isolate the most crude oil in top and bottom silt particle, determine that 300 m3 that collect are returned to discharge opeing clear liquid to be supplemented to containing 0.3% hybridization Semen Trigonellae rubber powder concentration and to carry out the 4th wellfracturing.Because the 4th pressure break needs 500m3 fracturing liquid base fluid, in discharge opeing clear liquid, add 200 m3 clear water cycle balances, make total amount reach 500 m3 to return the of the fracturing fluid preparation of discharge opeing base for the 4th therefore return at 300 m3.The design concentration of hybridization Semen Trigonellae rubber powder and relevant chemical agent is in " design concentration " in Table 1-3.Detect by 500 m3 after dilution are returned to discharge opeing clear liquid, detect and need supplementary calculation result in Table 1-3:
Table 1-3:500 m
3returning discharge opeing clear liquid detected result and magnitude of recruitment calculates
The magnitude of recruitment calculating according to table 1-3, by 1080 Kg calcium magnesium screeners be added to 500 m3 return in discharge opeing clear liquid after cycle balance, start vacuum jet pump circulation, slowly add 1150 Kg hybridization Semen Trigonellae rubber powders by jet-pump suction port, then add respectively 190Kg crude oil demulsifier, 1150Kg cleanup additive, 385Kg sterilant, 1915Kg clay stabilizer, 270Kg pH adjusting agent, continue to be circulated to liquid mixing abundant, what formation hybridization Semen Trigonellae rubber powder concentration was 0.3% returns discharge opeing base fracturing liquid base fluid L1-4.
When the 4th pressing crack construction, in infusion base fluid L1-4,2300Kg boric acid ester is mixed with the ratio of " base fluid L1-4: boric acid ester=100Kg:0.46Kg " with base fluid L1-4 and form and return discharge opeing base fracturing liquid and carry out fracturing reform for 100 DEG C of well temperature with interior oil reservoir.
Post-fracturing return discharge opeing still can by described in the present embodiment return the of the fracturing fluid preparation of discharge opeing base and pressing crack construction method is proceeded to recycle.
Embodiment 2:
Shown in Fig. 1, total volume is in 1000m3 container, to add 980 m3 water at the scene, start vacuum jet pump circulation, slowly add 3500 Kg hybridization Semen Trigonellae rubber powders by jet-pump suction port, then distinguish 5000Kg cleanup additive, 1000Kg sterilant, 5000Kg clay stabilizer, 5000Kg pore forming material, 500Kg pH adjusting agent, continue to be circulated to liquid mixing abundant, form the clear aqueous fracturing fluid base fluid L2-1 that hybridization Semen Trigonellae rubber powder concentration is 0.35%.
When the 1st pressing crack construction, in infusion solution L2-1,6000Kg boric acid ester is mixed and forms clear aqueous fracturing fluid and carry out fracturing reform for 100-130 DEG C of well temperature with interior gasser with the ratio of " base fluid L2-1: boric acid ester=100Kg:0.6Kg " with base fluid L2-1.
The 1st time post-fracturing fracturing outlet liquid is 810 m3.To return discharge opeing settlement separation tank and carry out desanding, isolate bottom silt particle, determine that 800 m3 that collect are returned to discharge opeing clear liquid to be supplemented to containing 0.35% hybridization Semen Trigonellae rubber powder concentration and to carry out gasser pressure break next time.The design concentration of hybridization Semen Trigonellae rubber powder and relevant chemical agent is in " design concentration " in Table 2-1.By detecting returning discharge opeing clear liquid, detect and need supplementary calculation result in Table 2-1:
Table 2-1:
The magnitude of recruitment calculating according to table 2-1, by 3520 Kg calcium magnesium screeners be added to 800 m3 return in discharge opeing clear liquid after cycle balance, start vacuum jet pump circulation, slowly add 1920 Kg hybridization Semen Trigonellae rubber powders by jet-pump suction port, then add respectively 2744Kg cleanup additive, 560Kg sterilant, 2744Kg clay stabilizer, 2744Kg pore forming material, 880Kg pH adjusting agent, continue to be circulated to liquid mixing abundant, what formation hybridization Semen Trigonellae rubber powder concentration was 0.35% returns discharge opeing base fracturing liquid base fluid L2-2.
When the 2nd pressing crack construction, in infusion base fluid L2-2,3288 Kg boric acid esters are mixed with the ratio of " base fluid L2-2: boric acid ester=100Kg:0.411Kg " with base fluid L2-2 and form and return discharge opeing base fracturing liquid and carry out fracturing reform for 100-140 DEG C of well temperature with interior gasser.
The 2nd time post-fracturing fracturing outlet liquid is 560 m3.To return discharge opeing settlement separation tank and carry out desanding, isolate bottom silt particle, determine that 550 m3 that collect are returned to discharge opeing clear liquid to be supplemented to containing 0.35% hybridization Semen Trigonellae rubber powder concentration and to carry out gasser pressure break next time.The design concentration of hybridization Semen Trigonellae rubber powder and relevant chemical agent is in " design concentration " in Table 2-2.By detecting returning discharge opeing clear liquid, detect and need supplementary calculation result in Table 2-2:
Table 2-2:
The magnitude of recruitment calculating according to table 2-2, by 3520 Kg calcium magnesium screeners be added to 550 m3 return in discharge opeing clear liquid after cycle balance, start vacuum jet pump circulation, slowly add 1375Kg hybridization Semen Trigonellae rubber powder by jet-pump suction port, then add respectively 1963.5Kg cleanup additive, 390.5Kg sterilant, 1963.5Kg clay stabilizer, 1963.5Kg pore forming material, 880Kg pH adjusting agent, continue to be circulated to liquid mixing abundant, what formation hybridization Semen Trigonellae rubber powder concentration was 0.35% returns discharge opeing base fracturing liquid base fluid L2-3.
When the 3rd pressing crack construction, in infusion base fluid L2-3,2359.5 Kg boric acid esters are mixed with the ratio of " base fluid L2-3: boric acid ester=100Kg:0.429Kg " with base fluid L2-3 and form and return discharge opeing base fracturing liquid and carry out fracturing reform for 100-130 DEG C of well temperature with interior gasser.
Post-fracturing return discharge opeing still can by described in the present embodiment return the of the fracturing fluid preparation of discharge opeing base and pressing crack construction method is proceeded to recycle.
Claims (13)
1. plant gum fracturing fluid and return the method for discharge opeing recycle, is characterized in that: its fracturing liquid is divided into clearly aqueous fracturing fluid and returns discharge opeing base fracturing liquid;
Clear aqueous fracturing fluid is the mixture with following composition and weight part:
Clear water: 99.82～61.2 parts
Hybridization Semen Trigonellae rubber powder: 0.15～0.8 part
Boric acid ester: 0.03～20.0 part
Crude oil demulsifier: 0～1.0 part
Cleanup additive: 0～2.0 part
Pore forming material: 0～2.0 part
Sterilant: 0～1.0 part
Clay stabilizer: 0～2.0 part
PH adjusting agent: 0～10.0 part
Returning discharge opeing base fracturing liquid is the mixture with following composition and weight part:
Return discharge opeing clear liquid: 99.98～20 parts
Clear water: 0～36.2 part
Calcium magnesium screener: 0.01～5.0 part
PH adjusting agent: 0.01～10.0 part
Hybridization Semen Trigonellae rubber powder: 0～0.8 part
Crude oil demulsifier: 0～1.0 part
Cleanup additive: 0～2.0 part
Pore forming material: 0～2.0 part
Sterilant: 0～1.0 part
Clay stabilizer: 0～2.0 part
Boric acid ester: 0～20.0 part.
2. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described clear aqueous fracturing fluid refers to fracturing liquid used through pressure break with end, the preparation taking cleaning water as solvent.
3. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described in return discharge opeing base fracturing liquid and refer to the fracturing liquid of the fracturing outlet liquid clear liquid preparation that utilizes pressure break to return to clear liquid or diluted with clear water.
4. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, it is characterized in that: described hybridization Semen Trigonellae rubber powder derives from the endosperm of the hybridization product taking Semen Trigonellae as female parent, taking guar-bean as male parent, its molecular weight is between 2 × 105-3 × 105, and its molecular structural formula is:
Wherein n value is: 100≤n≤150.
5. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, is characterized in that: the described boric acid ester boric acid ester that to be boric acid form with the organic compound that contains 2 above-OH groups.
6. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described pH adjusting agent is mixture and the aqueous solution that any one or the arbitrary combination in them in ammoniacal liquor or potassium hydroxide or sodium hydroxide or sodium carbonate or sodium bicarbonate or tertiary sodium phosphate inorganic base or Monoethanolamine MEA BASF or trolamine or methane amide or ethanamide organic amine forms.
7. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described calcium magnesium screener refer to tripoly phosphate sodium STPP or Potassium tripolyphosphate or Sodium hexametaphosphate 99 or hexa metaphosphoric acid potassium or EDTA or different anti-hematic acid or different anti-hematic acid sodium or citric acid or Trisodium Citrate or gluconic acid or Sunmorl N 60S or hydroxy ethylene diphosphonic acid or Amino Trimethylene Phosphonic Acid or polyacrylic acid or sodium polyacrylate or polyacrylic acid potassium or hydrolysis maleic anhydride or vinylformic acid/methyl acrylate copolymer or vinylformic acid/Propylene glycol monoacrylate/methyl acrylate terpolymer or acrylic acid/acrylamide methyl propane sulfonic acid/Hypophosporous Acid, 50 terpolymer or sodium lignosulfonate or lignosulfonic acid potassium or, any one or arbitrary combination in them in tannin and the mixture and the aqueous solution that form.
8. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described crude oil demulsifier refers to alkyl polymerization ethers or alkyl polymerization alcohols or alkyl sulfonates or alkylsurfuric acid salt compounds and the arbitrary combination in them and the mixture and the aqueous solution that form.
9. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described cleanup additive refers to polyoxyethylene alkylphenol or peregal or alkylsulfonate or alkyl-sulphate and the arbitrary combination in them and the mixture that forms.
10. a kind of plant gum fracturing fluid according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described pore forming material refers to the quaternary amine tensio-active agent of carbon atoms 12-18.
11. a kind of plant gum fracturing fluids according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described sterilant refers to any one or the arbitrary combination in them in formaldehyde or glutaraldehyde or 12-16 alkyl benzyl ammonium chloride or 12-16 alkyl benzyl brometo de amonio and the mixture and the aqueous solution that form.
12. a kind of plant gum fracturing fluids according to claim 1 and return the method for discharge opeing recycle, is characterized in that: described clay stabilizer is mixture and the aqueous solution that any one or arbitrary combination in them of ammonium chloride or sodium-chlor or Repone K or calcium chloride or magnesium chloride or cationic quaternary ammonium salt or cationic quaternary ammonium salt polymkeric substance forms.
13. a kind of plant gum fracturing fluids according to claim 1 and return the method for discharge opeing recycle, it is characterized in that: described in to return discharge opeing clear liquid be to adopt settling process or filtration method that the crude oil in fracturing outlet liquid is separated with solid phase particles, the clear liquid obtaining.
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| CN105778880A (en) * | 2016-04-12 | 2016-07-20 | 三原弘迪森精细化工有限公司 | Method for preparing plant gum cross-linking fracturing fluid by means of high-hardness saline |
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| CN105838346B (en) * | 2016-04-12 | 2018-12-18 | 三原弘迪森精细化工有限公司 | Glue, which is broken, using pressure break returns the preparation method that natural plant gum crosslinked fracturing fluid is prepared in drain |
| CN107400506A (en) * | 2016-05-18 | 2017-11-28 | 中国石油天然气股份有限公司 | Fracturing fluid and preparation method thereof |
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| CN109054801A (en) * | 2018-08-29 | 2018-12-21 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of coal bed gas well fracturing fluid and preparation method thereof |
| CN111944509A (en) * | 2020-08-26 | 2020-11-17 | 肯特催化材料股份有限公司 | Anti-swelling agent for shale gas fracturing |
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| CN113150789A (en) * | 2020-12-30 | 2021-07-23 | 陕西品物皆春生态科技有限公司 | Guar gum-humic acid type oil and gas field fracturing fluid flowback fluid water retention and sand fixation agent and preparation method and application thereof |
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