CN108084988B - Bridging agent for natural gas well diversion fracturing microbubble temporary plugging liquid and application thereof - Google Patents
Bridging agent for natural gas well diversion fracturing microbubble temporary plugging liquid and application thereof Download PDFInfo
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- CN108084988B CN108084988B CN201711424583.0A CN201711424583A CN108084988B CN 108084988 B CN108084988 B CN 108084988B CN 201711424583 A CN201711424583 A CN 201711424583A CN 108084988 B CN108084988 B CN 108084988B
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- 239000007788 liquid Substances 0.000 title claims abstract description 94
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 74
- 239000002343 natural gas well Substances 0.000 title claims abstract description 36
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229960003237 betaine Drugs 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 8
- 229920002472 Starch Polymers 0.000 claims description 14
- 239000008107 starch Substances 0.000 claims description 14
- 235000019698 starch Nutrition 0.000 claims description 14
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 12
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 12
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 10
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims description 8
- 229920003064 carboxyethyl cellulose Polymers 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 5
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 5
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 4
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims 2
- 239000007789 gas Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 12
- 150000003839 salts Chemical class 0.000 abstract description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003945 anionic surfactant Substances 0.000 abstract description 7
- 239000011575 calcium Substances 0.000 abstract description 7
- 229910052791 calcium Inorganic materials 0.000 abstract description 7
- 238000005187 foaming Methods 0.000 abstract description 6
- 238000012827 research and development Methods 0.000 abstract 1
- 239000006260 foam Substances 0.000 description 30
- -1 alkyl betaine Chemical compound 0.000 description 15
- 239000012530 fluid Substances 0.000 description 15
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 5
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229960001407 sodium bicarbonate Drugs 0.000 description 2
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000012224 working solution Substances 0.000 description 1
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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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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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
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/703—Foams
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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
- C09K8/84—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
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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- 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
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
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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)
- Detergent Compositions (AREA)
- Paints Or Removers (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a bridging agent for a natural gas well diversion fracturing microbubble temporary plugging liquid and application thereof, wherein the bridging agent is prepared from an anionic surfactant, betaine and weak base in a mass ratio of (2-4): (5-7): (1-2), and the invention also provides a method for preparing the microbubble temporary plugging liquid by applying the bridging agent, which comprises the following steps: under the condition of stirring, adding a filler into water to prepare a test base solution, then adding a bridging agent into the test base solution, and stirring to obtain the microbubble temporary plugging solution. The bridging agent is a solid-phase-free bridging agent for the microbubble temporary plugging liquid, can form a gas core structure in the microbubble temporary plugging liquid, has the characteristics of low consumption and stable foaming effect, can adjust the strength of bubbles in the microbubble temporary plugging liquid, is suitable for the environment with the temperature of less than or equal to 130 ℃, simultaneously improves the salt and calcium pollution resistance of the microbubble temporary plugging liquid, and has important significance for the research and development and application of the natural gas well diverting fracturing microbubble temporary plugging liquid.
Description
Technical Field
The invention belongs to the technical field of treating agents for drilling fluids, relates to a treating agent for microbubble plugging fluid suitable for natural gas well steering fracturing temporary plugging operation, and particularly relates to a bridging agent for natural gas well steering fracturing microbubble temporary plugging liquid and application thereof.
Background
The natural gas well diversion fracturing microbubble temporary plugging liquid refers to working fluid for temporarily plugging an initial fracture in repeated fracturing operation of a natural gas well.
In the repeated fracturing operation process of the natural gas well, how to avoid that fracturing fluid enters an existing old fracture of a stratum and a generated new fracture extends along the direction of the old fracture causes that the repeated fracturing yield-increasing effect is not ideal.
The temporary plugging material is used for plugging the existing old cracks of the stratum, so that the new cracks and the old cracks are formed in a certain direction during secondary fracturing operation, the effective gas supply area of the stratum is enlarged, and the diversion fracturing is realized, which is a feasible way for improving the repeated fracturing yield-increasing effect of the natural gas well at present.
The existing fracturing plugging material comprises solid-phase inert plugging agents such as cement, silicate and the like, and can effectively plug the existing old cracks after entering the stratum, but the solid-phase inert plugging agents cannot be discharged back after remaining in the stratum cracks, so that the original gas productivity of the old cracks cannot be recovered, and the yield increasing effect after fracturing is damaged. Although the plugging material such as gel, fiber and the like is developed later, compared with an inert plugging agent, the plugging material has certain solubility and degradability, but has high solid content, is difficult to remove after entering a stratum for temporary plugging, and has the effect of damaging repeated fracturing and increasing yield.
Under the condition of unsatisfactory plugging effect, gas-liquid two-phase plugging fluids represented by foams are gradually introduced into repeated fracturing temporary plugging operation due to the advantages of no solid phase, low stratum residual quantity and the like, but the traditional foam and microbubble plugging fluids have the defects of low temporary plugging structural strength, salt resistance, poor temperature resistance and the like, so that the temporary plugging structural stability is poor, and the application of similar systems in deep wells and medium-deep wells is greatly limited.
Therefore, by optimizing the type of the treating agent with foaming and foam stabilizing effects in the foam fluid, the structural strength of the gas core external membrane is improved, and chemical groups with good salt resistance and temperature resistance are endowed to the gas core external membrane, so that the gas core structures are mutually independent and have good structural stability, and the method is an effective way for absorbing the advantages of gas-liquid two-phase plugging fluid and avoiding poor stability and low salt and temperature resistance effects.
When the diverting acidification microbubble temporary plugging liquid is prepared, the bridging agent can reduce the surface tension of gas and liquid, so that air enters a liquid phase along with stirring and naturally expands to form a bubble structure. The surfactant bridging agent commonly used in the petroleum industry is mainly anionic or nonionic in terms of the ionicity of the surfactant, and each type of bridging agent has respective advantages and disadvantages. The anionic bridging agent has strong foaming capacity, but poor salt and calcium resistance, and the pumping effect of the working solution is greatly influenced by the foaming amount; the nonionic bridging agent has strong salt and calcium resistance, but has poor foaming capability, and influences the bubble formation rate. Therefore, it is generally preferable to control the foam quality to about 20%.
The novel bridging agent for the natural gas well diverting fracturing microbubble temporary plugging liquid is researched and developed, can effectively form a gas core structure in the microbubble temporary plugging liquid, improves the salt and calcium pollution resistance of the microbubble temporary plugging liquid, and has important significance for research, development and application of the natural gas well diverting fracturing microbubble temporary plugging liquid.
Disclosure of Invention
Aiming at the diversion fracturing temporary plugging requirement of a natural gas well, the invention aims to research a bridging agent for a solid-phase-free microbubble temporary plugging liquid so as to reduce the surface tension of gas and liquid, effectively form a bubble structure in a system, adjust the density of working liquid, simultaneously achieve the effects of salt resistance and calcium pollution resistance, and be suitable for the diversion fracturing temporary plugging working environment of the natural gas well.
The technical scheme of the invention is as follows:
a bridging agent for a natural gas well diversion fracturing microbubble temporary plugging liquid is prepared by compounding an anionic surfactant, betaine and weak base, wherein the mass ratio of the anionic surfactant to the betaine to the weak base is (2-4): (5-7): (1-2).
The anionic surfactant is sodium dodecyl benzene sulfonate.
The betaine is alkyl betaine.
The alkyl betaine is one of dodecyl dimethyl betaine, tetradecyl dimethyl betaine, octadecyl dimethyl betaine, dodecyl dihydroxyethyl betaine, and octadecyl dihydroxyethyl betaine.
The weak base is one of sodium bicarbonate, sodium hydroxide and sodium carbonate.
A bridging agent for a natural gas well diversion fracturing microbubble temporary plugging liquid is prepared from sodium dodecyl benzene sulfonate, betaine and sodium bicarbonate, wherein the mass ratio of the sodium dodecyl benzene sulfonate to the betaine to the sodium bicarbonate is 4: 6: 1.
a method for preparing microbubble temporary plugging liquid by using the bridging agent for the natural gas well diversion fracturing microbubble temporary plugging liquid comprises the following steps: firstly, adding a filling agent into water under the stirring condition to prepare a test base solution, then adding a bridging agent into the test base solution, and stirring to obtain a microbubble temporary plugging solution; wherein the water: filling agent: the mass ratio of the bridging agent is (90-110): (2-4): (0.5 to 1.5).
The filler is prepared from carboxyethyl cellulose, carboxymethyl starch and polyacrylamide according to the mass ratio of (9-11): (1-3): (2-3).
The invention has the beneficial effects that:
the bridging agent for the natural gas well turning fracturing microbubble temporary plugging liquid can reduce the surface tension of gas and liquid, wraps the gas entering a liquid phase along with the mechanical stirring action, effectively and fully forms a gas core structure in a microbubble system, adjusts the density of working liquid, simultaneously achieves the effects of resisting salt and calcium pollution, and has important significance for the research, development and application of the natural gas well turning fracturing microbubble temporary plugging liquid;
compared with other treating agents with similar effects in the prior art, the bridging agent has the characteristics of gas core structure formation, low consumption and stable foaming effect, can adjust the strength of bubbles in the microbubble temporary plugging liquid, is suitable for an ultralow temperature (the temperature is less than or equal to 130 ℃) environment, is nontoxic and harmless, and is an environmentally acceptable treating agent.
Detailed Description
Example 1
The invention provides a bridging agent for a natural gas well diversion fracturing micro-bubble temporary plugging liquid, which is prepared by compounding an anionic surfactant, betaine and weak base, wherein the mass ratio of the anionic surfactant to the betaine to the weak base is (2-4): (5-7): (1-2).
The bridging agent for the microbubble temporary plugging liquid for the natural gas well diversion fracturing is specially designed aiming at the characteristics of the microbubble temporary plugging liquid system, is a solid-phase-free microbubble bridging agent for the temporary plugging liquid, is used for reducing the surface tension of gas and liquid, wraps the gas entering a liquid phase along with the mechanical stirring action, effectively forms a bubble structure in the microbubble system, regulates the density of working liquid, simultaneously achieves the effects of salt resistance and calcium pollution resistance, and is suitable for the natural gas well diversion fracturing temporary plugging operating environment.
Example 2
On the basis of example 1, the anionic surfactant is sodium dodecylbenzenesulfonate.
The betaine is alkyl betaine, and the alkyl betaine is preferably one of dodecyl dimethyl betaine, tetradecyl dimethyl betaine, octadecyl dimethyl betaine, dodecyl dihydroxyethyl betaine, and octadecyl dihydroxyethyl betaine.
The weak base is one of sodium bicarbonate, sodium hydroxide and sodium carbonate.
The sodium dodecyl benzene sulfonate, the betaine and the weak base can be obtained commercially and can be selected from common industrial products.
Example 3
The invention also provides a method for preparing the microbubble temporary plugging liquid by using the bridging agent for the natural gas well diversion fracturing microbubble temporary plugging liquid, which comprises the following steps: firstly, adding a filling agent into water under the stirring condition to prepare a test base solution, then adding a bridging agent into the test base solution, and stirring to obtain a microbubble temporary plugging solution; wherein the water: filling agent: the mass ratio of the bridging agent is (90-110): (2-4): (0.5 to 1.5).
The filler is prepared from carboxyethyl cellulose, carboxymethyl starch and polyacrylamide according to the mass ratio of (9-11): (1-3): (2-3).
Example 4
A bridging agent for a natural gas well diversion fracturing microbubble temporary plugging liquid is prepared from sodium dodecyl benzene sulfonate, dodecyl dimethyl betaine and sodium bicarbonate in a mass ratio of 2: 5: 2, and (3) preparing.
The formula for preparing the microbubble temporary plugging liquid by applying the bridging agent for the natural gas well diversion fracturing microbubble temporary plugging liquid is as follows: filling agent: the mass ratio of the bridging agent is 90: 2: 0.5.
the filler is prepared from carboxymethyl starch, carboxyethyl starch and carboxypropyl starch in a mass ratio of 9: 1: 2 is prepared by
According to the formula, the filling agent with the formula amount is sequentially added into the water with the formula amount under the stirring condition to prepare the base liquid, the bridging agent with the formula amount is added into the base liquid, and the microbubble temporary plugging liquid is obtained after stirring.
Example 5
A bridging agent for a natural gas well diversion fracturing microbubble temporary plugging liquid is prepared from sodium dodecyl benzene sulfonate, tetradecyl dimethyl betaine and sodium hydroxide in a mass ratio of 4: 7: 1, and preparing the composition.
The formula for preparing the microbubble temporary plugging liquid by applying the bridging agent for the natural gas well diversion fracturing microbubble temporary plugging liquid is as follows: filling agent: the mass ratio of the bridging agent is 110: 4: 1.5.
the filler is prepared from carboxymethyl starch, carboxyethyl starch and carboxypropyl starch in a mass ratio of 10: 2: 2 is prepared by
According to the formula, the filling agent with the formula amount is sequentially added into the water with the formula amount under the stirring condition to prepare the base liquid, the bridging agent with the formula amount is added into the base liquid, and the microbubble temporary plugging liquid is obtained after stirring.
Example 6
A bridging agent for a natural gas well diversion fracturing microbubble temporary plugging liquid is prepared from sodium dodecyl benzene sulfonate, dodecyl dihydroxy ethyl betaine and sodium carbonate in a mass ratio of 3: 6: 2, and (3) preparing.
The formula for preparing the microbubble temporary plugging liquid by applying the bridging agent for the natural gas well diversion fracturing microbubble temporary plugging liquid is as follows: filling agent: the mass ratio of the bridging agent is 100: 3: 1.
the filler is prepared from carboxymethyl starch, carboxyethyl starch and carboxypropyl starch in a mass ratio of 11: 2: 2 is prepared by
According to the formula, the filling agent with the formula amount is sequentially added into the water with the formula amount under the stirring condition to prepare the base liquid, the bridging agent with the formula amount is added into the base liquid, and the microbubble temporary plugging liquid is obtained after stirring.
Example 7
The preferred embodiment of the invention is that the bridging agent for the natural gas well diversion fracturing microbubble temporary plugging liquid is prepared from sodium dodecyl benzene sulfonate, betaine and sodium bicarbonate according to a mass ratio of 4: 6: 1 is prepared by compounding.
The method for preparing the microbubble temporary plugging liquid by using the bridging agent for the natural gas well diversion fracturing microbubble temporary plugging liquid comprises the following steps: firstly, adding a filling agent into water under the stirring condition to prepare a test base solution, then adding a bridging agent into the test base solution, and stirring to obtain a microbubble temporary plugging solution; wherein the water: filling agent: the mass ratio of the bridging agent is 100: 3: 1.
the filler is prepared from carboxyethyl cellulose, carboxymethyl starch and polyacrylamide according to a mass ratio of 10: 2: 3, and preparing the product.
Example 8
The performance test of the bridging agent for the natural gas well diverting fracturing microbubble temporary plugging liquid comprises the following steps:
pH value
The bridging agent for the natural gas well diversion fracturing microbubble temporary plugging liquid is mixed with clear water (namely 0.8-1.0 g of bridging agent/100 mL of water) by mass fraction of 0.8% -1.0% to prepare bridging agent base liquid, a glass rod is used for dipping a microbubble temporary plugging liquid bridging agent sample, the microbubble temporary plugging liquid bridging agent sample is dripped on a wide pH test paper, the pH value is measured, and the accuracy is achieved.
2. Density of
And (3) weighing the density value of the bridging agent base liquid by using a liquid densimeter with the measuring range of 0.8-2.0 g/cm3 at room temperature.
3. Foam quality and foam half-life period of base liquid of microbubble temporary plugging liquid bridging agent
3.1. Foam quality of microbubble temporary plugging liquid bridging agent
3.1.1. Foam fluid dispensing apparatus
The high-speed frequency conversion stepless speed regulation stirrer has the rotating speed of 0-12000 r/min.
3.1.2. Preparation of bridging agent foam quality base liquid for testing microbubble temporary plugging liquid
400g of water, 12.00g of filling agent for microbubble temporary plugging liquid and 4.00g of bridging agent for microbubble temporary plugging liquid; wherein the filler for the microbubble temporary plugging liquid is prepared from carboxyethyl cellulose, carboxymethyl starch and polyacrylamide according to a mass ratio of 10: 2: 3, preparing; the bridging agent for the microbubble temporary plugging liquid is prepared from sodium dodecyl benzene sulfonate, betaine and sodium bicarbonate according to a mass ratio of 4: 6: 1, and preparing the composition.
According to the formula, under the stirring condition, the filler is sequentially added into the water to prepare the testing base liquid, then the bridging agent is added into the testing base liquid to prepare the micro-bubble temporary plugging liquid testing working fluid, and the stirring speed in the whole preparation process can be controlled to be about 6000 rpm.
Completely transferring the prepared microbubble temporary plugging liquid testing fluid into a 1000mL graduated cylinder, recording the total volume Vz (mL) of the temporary plugging liquid, and calculating the foam quality according to the formula (I); and a timer is started, and the time required for the foam volume to fall to 1/2VzmL is measured, namely the half-life t1/2 (min).
3.1.3. Foam mass calculation
And (3) calculating the foam quality as the formula (I) by subtracting the percentage of the volume of water in the test liquid to the total volume of the foam after the bridging agent for the natural gas well diverting fracturing micro-bubble temporary plugging liquid is fully stirred in the test base liquid at the stirring speed of about 5000 rpm.
In the formula, S represents the mass percent of foam; v1 is the total volume in the measuring cylinder after stirring, mL; (V1-V2) is the volume of gas contained in the foam, mL.
3.2. Quality determination of brine foam of microbubble temporary plugging liquid treating agent
3.2.1. Foam fluid dispensing apparatus
8010 model S WARING mixer, speed 22000/18000 high/low.
3.2.2. Taking 10g of sodium chloride, pouring the sodium chloride into 100mL of distilled water, stirring until the sodium chloride is fully dissolved, then putting the sodium chloride into a high-speed stirrer, fully stirring at a high-grade position until the foam is uniform, immediately taking down a special measuring cup after no obvious layering exists, simultaneously transferring all fluid in the measuring cup into a 1000mL graduated measuring cylinder, recording the total volume V1(mL) of the foam, and calculating the foam quality according to the formula (I); the foam quality of the present invention in a 10% sodium chloride solution was measured.
3.2.3. Pouring 5g of calcium chloride into 100mL of distilled water, stirring until the calcium chloride is dissolved uniformly, then putting the calcium chloride into a high-speed stirrer, fully stirring at a high-grade position until the foam is uniform, immediately taking down a special measuring cup after no obvious layering exists, simultaneously transferring all fluid in the measuring cup into a 1000mL graduated measuring cylinder, recording the total volume V1(mL) of the foam, and calculating the foam quality according to the formula (I); the foam quality of the present invention in a 5% calcium chloride solution was measured.
The test results obtained are shown in table 1:
table 1 bridging agent performance test meter for natural gas well diversion fracturing microbubble temporary plugging liquid
From the above experimental results, it can be seen that all performance indexes of the microbubble temporary plugging liquid bridging agent of the embodiment all meet the design requirements, the pH value is 7.0-10.0, and the density is 0.50-0.90 g/cm3The foam quality of the base liquid is more than or equal to 20 percent, and the half life period of the base liquid is more than or equal to 120.0 min; meanwhile, the foam quality of more than 20 percent ensures that the microbubble temporary plugging liquid can realize lower density; the half-life period of 120min ensures the stability of the microbubble temporary plugging liquid after the gas core structure in the microbubble is formed; 10% sodium chloride solution of 50% or more and 5% chlorineThe foam quality of the calcium chloride solution ensures that the system is stable when the microbubble temporary plugging liquid meets underground fluid.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (1)
1. A method for preparing microbubble temporary plugging liquid by applying a bridging agent for natural gas well diversion fracturing microbubble temporary plugging liquid is characterized by comprising the following steps of: the method comprises the following steps: firstly, adding a filling agent into water under the stirring condition to prepare a test base solution, then adding a bridging agent into the test base solution, and stirring to obtain a microbubble temporary plugging solution; wherein the water: filling agent: the mass ratio of the bridging agent is (90-110): (2-4): (0.5 to 1.5);
the bridging agent is prepared from sodium dodecyl benzene sulfonate, betaine and sodium bicarbonate, wherein the mass ratio of the sodium dodecyl benzene sulfonate to the betaine to the sodium bicarbonate is 4: 6: 1;
the filler is prepared from carboxyethyl cellulose, carboxymethyl starch and polyacrylamide according to the mass ratio of (9-11): (1-3): (2-3).
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001083946A1 (en) * | 2000-05-03 | 2001-11-08 | Trican Well Service Ltd. | Fracturing fluid |
| CN104109515A (en) * | 2013-04-16 | 2014-10-22 | 北京力会澜博能源技术有限公司 | Low temperature freshwater fuzzy-ball working fluid ball layer agent |
| WO2015016878A1 (en) * | 2013-07-31 | 2015-02-05 | Halliburton Energy Services, Inc. | Wellbore servicing compositions and methods of making and using same |
| CN104694111A (en) * | 2013-12-06 | 2015-06-10 | 中国石油天然气股份有限公司 | Low-temperature fresh water-based fracturing steering fluid for coal bed gas and application thereof |
| CN106350043A (en) * | 2016-07-22 | 2017-01-25 | 北京斯迪莱铂油气技术有限公司 | Compound temporary plugging agent and compound temporary plugging method used in temporary blocking turnaround fracture |
| CN106479473A (en) * | 2016-08-31 | 2017-03-08 | 陕西省石油化工研究设计院 | A kind of foaming cleanup additive for gas well |
-
2017
- 2017-12-25 CN CN201711424583.0A patent/CN108084988B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001083946A1 (en) * | 2000-05-03 | 2001-11-08 | Trican Well Service Ltd. | Fracturing fluid |
| CN104109515A (en) * | 2013-04-16 | 2014-10-22 | 北京力会澜博能源技术有限公司 | Low temperature freshwater fuzzy-ball working fluid ball layer agent |
| WO2015016878A1 (en) * | 2013-07-31 | 2015-02-05 | Halliburton Energy Services, Inc. | Wellbore servicing compositions and methods of making and using same |
| CN104694111A (en) * | 2013-12-06 | 2015-06-10 | 中国石油天然气股份有限公司 | Low-temperature fresh water-based fracturing steering fluid for coal bed gas and application thereof |
| CN106350043A (en) * | 2016-07-22 | 2017-01-25 | 北京斯迪莱铂油气技术有限公司 | Compound temporary plugging agent and compound temporary plugging method used in temporary blocking turnaround fracture |
| CN106479473A (en) * | 2016-08-31 | 2017-03-08 | 陕西省石油化工研究设计院 | A kind of foaming cleanup additive for gas well |
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