CN112126419A - Sand carrying liquid capable of being prepared continuously and preparation process thereof - Google Patents
Sand carrying liquid capable of being prepared continuously and preparation process thereof Download PDFInfo
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- CN112126419A CN112126419A CN202010921386.5A CN202010921386A CN112126419A CN 112126419 A CN112126419 A CN 112126419A CN 202010921386 A CN202010921386 A CN 202010921386A CN 112126419 A CN112126419 A CN 112126419A
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- 239000007788 liquid Substances 0.000 title claims abstract description 61
- 239000004576 sand Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 63
- 239000012530 fluid Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000002156 mixing Methods 0.000 claims abstract description 29
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 21
- 239000002562 thickening agent Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000003245 coal Substances 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 58
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 15
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims description 10
- 239000006004 Quartz sand Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 8
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 6
- KKYDYRWEUFJLER-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,5,5,6,6,7,7,10,10,10-heptadecafluorodecyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCC(F)(F)F KKYDYRWEUFJLER-UHFFFAOYSA-N 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 claims description 5
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- 239000004359 castor oil Substances 0.000 claims description 5
- 235000019438 castor oil Nutrition 0.000 claims description 5
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 5
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 claims description 5
- CMOAHYOGLLEOGO-UHFFFAOYSA-N oxozirconium;dihydrochloride Chemical compound Cl.Cl.[Zr]=O CMOAHYOGLLEOGO-UHFFFAOYSA-N 0.000 claims description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 5
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 5
- 239000000811 xylitol Substances 0.000 claims description 5
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 claims description 5
- 229960002675 xylitol Drugs 0.000 claims description 5
- 235000010447 xylitol Nutrition 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 229920002907 Guar gum Polymers 0.000 abstract description 12
- 239000000665 guar gum Substances 0.000 abstract description 12
- 229960002154 guar gum Drugs 0.000 abstract description 12
- 235000010417 guar gum Nutrition 0.000 abstract description 12
- 230000007547 defect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000126 substance 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
- 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
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
-
- 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
-
- 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
-
- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a continuously prepared sand-carrying liquid and a preparation process thereof, wherein the sand-carrying liquid comprises the following components in parts by weight: 1-10 parts of a thickening agent, 1-5 parts of a crosslinking agent for fracturing, 900-1000 parts of water and 20-60 parts of a propping agent. The invention has the following beneficial effects: the sand carrying ratio is high, the construction friction is low, the construction discharge capacity is large, and the construction efficiency is greatly improved; the sand-carrying fluid has the characteristic of continuous mixing construction, and ensures the stability of a sand-carrying fluid system; the method can be suitable for construction of compact strata such as sand beds and coal bed fracturing, and overcomes the construction defects of the traditional guar gum sand-carrying liquid and slickwater linear gum system.
Description
Technical Field
The invention relates to the technical field of acid fracturing, in particular to a sand-carrying fluid capable of being continuously prepared and a preparation process thereof.
Background
The fracturing fluid is a working fluid used for fracturing and reconstructing a hydrocarbon reservoir, and has the main function of transmitting high pressure formed by ground equipment into a stratum so as to fracture the stratum to form a fracture and conveying a propping agent along the fracture. The fracturing fluid is a general term and can be divided into a pad fluid, a sand carrying fluid and a displacing fluid according to different tasks in the fracturing process. The function of the sand carrying fluid is to bring the propping agent into the fracture and place sand on a designated position, and the proportion of the sand carrying fluid is larger in the total amount of the fracturing fluid. The sand-carrying fluid has the functions of making cracks and cooling the stratum like other fracturing fluids.
The sand-carrying fracturing fluid in the current market can be divided into guar gum fracturing fluid and polymer fracturing fluid. Aiming at sandstone and compact coal seams, the traditional process usually adopts high-viscosity guar gum sand-carrying liquid for construction, and the construction process has the advantages that: the water consumption is low, and the sand carrying proportion is high. The disadvantages are as follows: (1) liquid needs to be prepared before construction, and the prepared construction liquid needs to be stored in a large number of container tanks, so that material resources, manpower and space are wasted; (2) the friction resistance is large in the construction process, the construction displacement is small, and the construction efficiency is low; the method aims at the brittle shale stratum and generally uses a slickwater linear colloid system for construction, and is characterized by low friction resistance and large square amount in construction, larger reconstruction volume can be obtained, and the method has the defects of low system viscosity, inapplicability to compact stratum and limitation of construction environment.
Disclosure of Invention
The invention aims to provide a continuously prepared sand-carrying fluid and a preparation process thereof, aiming at the problems that the traditional high-viscosity guar gum sand-carrying fluid system needs to be prepared before construction, wastes material resources, manpower and space, has large construction friction resistance, poor system stability and low construction efficiency, and the problems that a slickwater linear gum system has low viscosity, is not suitable for compact strata and is limited by construction environment. The sand-carrying liquid and the preparation process thereof have the characteristics of high sand-carrying ratio, low construction friction resistance and large construction discharge capacity, and greatly improve the construction efficiency; the system can be continuously mixed and constructed, so that the stability of the sand-carrying liquid system is ensured; in addition, the method can be suitable for construction of compact strata such as sand beds and coal seam fracturing, and overcomes the construction defects of the traditional guar gum sand-carrying liquid and slickwater linear gum system.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the continuously-prepared sand carrying fluid consists of 1-10 parts by weight of a variable-viscosity thickening agent, 1-5 parts by weight of a crosslinking agent for fracturing, 900-1000 parts by weight of water and 20-60 parts by weight of a propping agent.
Furthermore, the continuously-prepared sand carrying fluid consists of 5 parts by weight of thickening agent, 3 parts by weight of crosslinking agent for fracturing, 950 parts by weight of water and 40 parts by weight of propping agent.
Further, the thickening agent is prepared from the following raw materials in parts by weight: 10-30 parts of acrylamide, 1-15 parts of acrylic acid, 25-50 parts of castor oil, 0.02-0.2 part of azodiisobutyronitrile, 1-5 parts of SDS, 0.01-0.05 part of urea, 0.01-0.03 part of p-benzoquinone, 0.5-5 parts of heptadecafluorodecyltrimethoxysilane, 0.5-5 parts of formaldehyde and 30-60 parts of water.
Further, the crosslinking agent for fracturing is an organic zirconium, titanium and aluminum crosslinking agent and is prepared from the following raw materials in parts by weight: 5-15 parts of zirconium oxychloride, 5-15 parts of titanium tetrachloride, 5-15 parts of aluminum trichloride, 35-65 parts of water, 5-45 parts of ethylene glycol, 0.5-2 parts of sodium hydroxide, 5-35 parts of acetic acid, 0.1-3 parts of xylitol and 1-5 parts of polyoxyethylene ether.
Furthermore, the proppant is one or a combination of more of ceramsite, quartz sand and powder ceramic in any proportion.
Further, but a preparation technology of sand-carrying liquid of continuous preparation, prepare through the fracturing blender truck, the fracturing blender truck includes that fluid reservoir, fracturing blender sled, water pumping pipeline, A pipeline, auger pipeline, B pipeline, A liquid add pump, auger, B liquid add the pump.
Further, the preparation process of the continuously-prepared sand-carrying fluid comprises the following steps:
s1, adding 900-1000 parts of water into the sand mixing skid from the liquid tank through a water pumping pipeline;
s2, adding 1-10 parts of a viscosity-changing thickening agent into the liquid A adding pump, adding 1-5 parts of a crosslinking agent for fracturing into the liquid B adding pump, and adding 20-60 parts of a propping agent into the auger;
s3, conveying the raw materials into the sand mixing skid through the pipeline A, the auger pipeline and the pipeline B, and mixing in the sand mixing skid to obtain a sand carrying liquid;
furthermore, the preparation process of the continuously prepared sand-carrying fluid is suitable for fracturing construction of tight strata such as sandstone, coal beds and the like.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention is composed of a thickening agent, a cross-linking agent for fracturing, water and a propping agent, and has higher sand carrying ratio. The traditional slickwater linear glue system usually has a sand carrying ratio of 10% -15%, and the construction sand carrying ratio of the invention is up to 15% -25%, so that the invention has very obvious advantages.
2. The construction friction resistance of the traditional guar gum fracturing fluid is high, so that the construction discharge capacity is low, the construction discharge capacity is only 2-3 square/minute, the construction friction resistance is low, and the construction discharge capacity can be improved to 3-5 square/minute.
3. The traditional guar gum construction needs to prepare liquid to a liquid tank in advance for storage, so that the problems of low construction efficiency and storage stability exist, and when the guar gum is placed for a long time, bacteria and ions in the environment can cause the viscosity of a guar gum liquid system to be reduced or the guar gum liquid system cannot be crosslinked, so that the guar gum liquid system fails.
4. The traditional slickwater linear gel fracturing fluid system is low in viscosity and not suitable for fracturing of compact gas and sandstone formations, the problem is solved, and the method is suitable for constructing compact formations such as sand layers, coal beds and the like.
Drawings
FIG. 1 is a schematic structural view of a fracturing blender truck for use in fluid blending according to the present invention;
FIG. 2 is a sand carrying ratio curve of an upper layer of a gas formation when the sand carrying fluid is used for fracturing construction in example 1 of the present invention;
FIG. 3 is a gas-bed lower-layer sand-carrying ratio curve of the sand-carrying fluid used for fracturing construction in example 1 of the present invention;
FIG. 4 is a gas layer upper layer construction displacement curve of the sand-carrying fluid used for fracturing construction in embodiment 1 of the present invention;
FIG. 5 is a gas formation lower layer construction displacement curve of the sand-carrying fluid used for fracturing construction in embodiment 1 of the present invention.
Reference numerals: the system comprises a 1-liquid tank, a 2-sand mixing pry, a 3-water pumping pipeline, a 4-A pipeline, a 5-auger pipeline, a 6-B pipeline, a 7-A liquid adding pump, an 8-auger and a 9-B liquid adding pump.
Detailed Description
The present invention will be further described with reference to the following examples, which are intended to illustrate and explain the present invention and are not intended to limit the present invention.
Unless otherwise specified, the chemicals referred to in the examples are all available from conventional means.
Unless otherwise specified, the parts referred to in the examples are parts by weight.
Example 1
The sand-carrying liquid of the embodiment comprises the following components in parts by weight:
5 parts of thickening agent, 3 parts of crosslinking agent for fracturing, 950 parts of water and 40 parts of quartz sand.
The viscosity-changing thickener comprises the following raw materials in parts by weight: 20 parts of acrylamide, 8 parts of acrylic acid, 40 parts of castor oil, 0.1 part of azodiisobutyronitrile, 3 parts of SDS, 0.03 part of urea, 0.02 part of p-benzoquinone, 3 parts of heptadecafluorodecyltrimethoxysilane, 3 parts of formaldehyde and 45 parts of water;
the crosslinking agent for fracturing comprises the following raw materials in parts by weight: 10 parts of zirconium oxychloride, 10 parts of titanium tetrachloride, 10 parts of aluminum trichloride, 50 parts of water, 25 parts of ethylene glycol, 1 part of sodium hydroxide, 20 parts of acetic acid, 1.5 parts of xylitol and 3 parts of polyoxyethylene ether.
The preparation process of the sand carrying liquid comprises the following steps:
s1, adding 950 parts of water into the sand mixing skid 2 from the liquid tank 1 through the water pumping pipeline 3 by using the liquid mixing truck for liquid preparation;
s2: adding 5 parts of a thickening agent into the liquid A adding pump 7, and adding 3 parts of a crosslinking agent for fracturing into the liquid B adding pump 9;
s3, adding 40 parts of proppant quartz sand into the packing auger 8;
s4, conveying the raw materials into the sand mixing skid 2 through the A pipeline 4, the auger pipeline 5 and the B pipeline 6, and mixing in the sand mixing skid 2 to obtain a sand carrying liquid;
the sand carrying liquid is used for testing the following gas layer environments (such as table 1 and table 2) to respectively obtain the sand carrying ratio and construction displacement results of the upper layer and the lower layer of the gas layer (fig. 2, fig. 3, fig. 4 and fig. 5).
The environmental parameters of the gas layer are shown in the table 1 and the table 2:
table 1: gas layer integrated data
Table 2: gas layer integrated data
Fig. 2 is a sand-carrying specific fracturing curve of the sand-carrying fluid for the upper layer of the gas layer, and fig. 3 is a sand-carrying specific fracturing curve of the sand-carrying fluid for the lower layer of the gas layer. As can be seen from FIG. 2, after testing for 25 minutes, the sand carrying rate of the upper layer of the fracturing construction gas layer is basically stabilized between 15 and 25 percent; as can be seen in fig. 3, the sand-carrying in the lower layer of the fracture construction gas layer was also stable between 15-25% after 60 minutes of testing. It can be seen that the sand carrying ratio of the fracturing construction gas layer is in a relatively high range of about 15-25% in both the upper layer and the lower layer.
Fig. 4 is the construction displacement of the sand-carrying fluid for the upper layer of the gas layer, and fig. 5 is the construction displacement of the sand-carrying fluid for the lower layer of the gas layer. As can be seen from FIG. 4, after 10 minutes of construction, the construction displacement of the upper layer of the air layer is stabilized to be about 3.8 square/minute, and the construction displacement can be kept all the time; as can be seen in FIG. 5, after 30 minutes of construction, the construction displacement of the lower layer of the air layer is basically stabilized at 3.6 square/minute. Therefore, no matter the sand-carrying liquid is used above or below the construction gas layer, the construction discharge capacity is large, and the construction discharge capacity range is about 3.5-4.0 square/minute.
In conclusion, compared with the traditional slickwater linear glue construction system (the sand carrying ratio is about 10% -15%), the construction sand carrying ratio of the invention is up to 15% -25%, and the construction method has very obvious advantages; moreover, because the construction friction resistance is low, the construction discharge capacity can be improved to 3-5 square/min, and compared with the traditional guar gum fracturing fluid (the construction discharge capacity is only 2-3 square/min), the construction efficiency is higher; in addition, through the fracturing blender truck liquid of joining in marriage, need not prepare before the construction prerequisite, join in marriage just now with can, practiced thrift a large amount of material resources and manpower, also guaranteed the stability of carrying the sand liquid, can not have the problem of putting the inefficacy for a long time.
Example 2
The sand-carrying liquid in the embodiment comprises the following components in parts by weight:
3 parts of thickening agent, 2 parts of crosslinking agent for fracturing, 920 parts of water and 30 parts of quartz sand;
the viscosity-changing thickener comprises the following raw materials in parts by weight: 15 parts of acrylamide, 5 parts of acrylic acid, 30 parts of castor oil, 0.05 part of azobisisobutyronitrile, 2 parts of SDS, 0.02 part of urea, 0.01 part of p-benzoquinone, 1 part of heptadecafluorodecyltrimethoxysilane, 1 part of formaldehyde and 35 parts of water;
the crosslinking agent for fracturing comprises the following raw materials in parts by weight: 7 parts of zirconium oxychloride, 7 parts of titanium tetrachloride, 7 parts of aluminum trichloride, 40 parts of water, 15 parts of ethylene glycol, 0.7 part of sodium hydroxide, 10 parts of acetic acid, 1 part of xylitol and 2 parts of polyoxyethylene ether.
The preparation process of the sand carrying liquid comprises the following steps:
s1, adding 920 parts of water into the sand mixing skid 2 from the liquid tank 1 through a water pumping pipeline 3 by using a sand mixing truck for liquid preparation;
s2, adding 3 parts of thickening agent into the liquid A adding pump 7, and adding 2 parts of crosslinking agent for fracturing into the liquid B adding pump 9;
s3, adding 30 parts of proppant quartz sand into the auger 8;
s4, conveying the raw materials into the sand mixing skid 2 through the A pipeline 4, the auger pipeline 5 and the B pipeline 6, and mixing in the sand mixing skid 2 to obtain a sand carrying liquid;
example 3
The sand-carrying liquid in the embodiment comprises the following components in parts by weight:
8 parts of thickening agent, 4 parts of crosslinking agent for fracturing, 980 parts of water and 50 parts of quartz sand;
the viscosity-changing thickener comprises the following raw materials in parts by weight: 25 parts of acrylamide, 12 parts of acrylic acid, 45 parts of castor oil, 0.15 part of azodiisobutyronitrile, 4 parts of SDS, 0.04 part of urea, 0.03 part of p-benzoquinone, 4 parts of heptadecafluorodecyltrimethoxysilane, 4 parts of formaldehyde and 55 parts of water;
the crosslinking agent for fracturing comprises the following raw materials in parts by weight: 13 parts of zirconium oxychloride, 13 parts of titanium tetrachloride, 13 parts of aluminum trichloride, 55 parts of water, 40 parts of ethylene glycol, 1.7 parts of sodium hydroxide, 30 parts of acetic acid, 2.5 parts of xylitol and 4 parts of polyoxyethylene ether.
The preparation process of the sand carrying liquid comprises the following steps:
s1, adding 980 parts of water into the sand mixing skid 2 from the liquid tank 1 through the water pumping pipeline 3 by using the liquid mixing truck for liquid preparation;
s2, adding 8 parts of thickening agent into the liquid A adding pump 7, and adding 4 parts of crosslinking agent for fracturing into the liquid B adding pump 9;
s3, adding 50 parts of proppant quartz sand into the packing auger 8;
s4, conveying the raw materials into the sand mixing skid 2 through the A pipeline 4, the auger pipeline 5 and the B pipeline 6, and mixing in the sand mixing skid 2 to obtain a sand carrying liquid;
although the specific embodiments of the present invention have been described in conjunction with the embodiments, it is not intended to limit the scope of the present invention, and it should be understood that various modifications and alterations can be made by those skilled in the art without inventive effort based on the technical solutions of the present invention.
Claims (8)
1. A sand carrying fluid capable of being prepared continuously is characterized in that: the fracturing fluid consists of 1-10 parts of a thickening agent, 1-5 parts of a crosslinking agent for fracturing, 900-1000 parts of water and 20-60 parts of a propping agent by weight.
2. The continuously formulable sand-carrying fluid of claim 1, wherein: the sand-carrying fluid comprises, by weight, 5 parts of thickening agent, 3 parts of crosslinking agent for fracturing, 950 parts of water and 40 parts of propping agent.
3. The continuously formulable sand-carrying fluid of claim 1 or 2, wherein: the viscosity-changing thickener is prepared from the following raw materials in parts by weight: 10-30 parts of acrylamide, 1-15 parts of acrylic acid, 25-50 parts of castor oil, 0.02-0.2 part of azodiisobutyronitrile, 1-5 parts of SDS, 0.01-0.05 part of urea, 0.01-0.03 part of p-benzoquinone, 0.5-5 parts of heptadecafluorodecyltrimethoxysilane, 0.5-5 parts of formaldehyde and 30-60 parts of water.
4. The continuously formulable sand-carrying fluid of claim 1 or 2, wherein: the crosslinking agent for fracturing is an organic zirconium, titanium and aluminum crosslinking agent and is prepared from the following raw materials in parts by weight: 5-15 parts of zirconium oxychloride, 5-15 parts of titanium tetrachloride, 5-15 parts of aluminum trichloride, 35-65 parts of water, 5-45 parts of ethylene glycol, 0.5-2 parts of sodium hydroxide, 5-35 parts of acetic acid, 0.1-3 parts of xylitol and 1-5 parts of polyoxyethylene ether.
5. The continuously formulable sand-carrying fluid of claim 1 or 2, wherein: the proppant is one or a combination of more of ceramsite, quartz sand and powder ceramic in any proportion.
6. The preparation process of the continuously-prepared sand-carrying liquid according to any one of claims 1 to 5, characterized in that the preparation is carried out by a sand mixing truck, and the sand mixing truck comprises a liquid tank (1), a sand mixing pry (2), a water pumping pipeline (3), an A pipeline (4), an auger pipeline (5), a B pipeline (6), an A liquid adding pump (7), an auger (8) and a B liquid adding pump (9).
7. The process of claim 6, comprising the steps of:
s1, adding 900-1000 parts of water into the sand mixing skid (2) from the liquid tank (1) through a water pumping pipeline (3);
s2, adding 1-10 parts of a thickening agent into the liquid A adding pump (7), adding 1-5 parts of a crosslinking agent for fracturing into the liquid B adding pump (9), and adding 20-60 parts of a propping agent into the auger (8);
s3, conveying the raw materials into the sand mixing skid (2) through the A pipeline (4), the auger pipeline (5) and the B pipeline (6), and mixing in the sand mixing skid (2) to obtain the sand carrying liquid.
8. The process of claim 7, wherein the carrier fluid is prepared by a process comprising: the process is suitable for fracturing construction of tight strata such as sandstone, coal seam and the like.
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