CN113578088A - Preparation method of fracturing fluid - Google Patents

Preparation method of fracturing fluid Download PDF

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Publication number
CN113578088A
CN113578088A CN202010367602.6A CN202010367602A CN113578088A CN 113578088 A CN113578088 A CN 113578088A CN 202010367602 A CN202010367602 A CN 202010367602A CN 113578088 A CN113578088 A CN 113578088A
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additive
fracturing fluid
solid additive
solid
conveying
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Inventor
陈鹏飞
熊钢
常宏岗
张亚东
周承美
潘春锋
何飞
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Petrochina Co Ltd
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Petrochina Co Ltd
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Priority to CN202010367602.6A priority Critical patent/CN113578088A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • 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
    • C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
    • 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
    • C09K8/60—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
    • C09K8/84—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
    • C09K8/905—Biopolymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)

Abstract

The invention relates to a preparation method of a fracturing fluid, and belongs to the technical field of fracturing fluids. The preparation method of the fracturing fluid comprises the following steps: obtaining the adding amount of the solid additive; adding the solid additive according to the adding amount of the solid additive; conveying the solid additive to a mechanical conveying inlet in a wind conveying mode; conveying the solid additive into the mixer by a mechanical conveying mode; obtaining the adding amount of the liquid additive; and adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive, and mixing to obtain the target fracturing fluid. The application avoids using excessive pipelines and is convenient to operate; the solid additive is conveyed to the mechanical conveying port in a wind conveying mode, so that friction between the solid additive and mechanical equipment in the mechanical conveying process is avoided, the conveying efficiency is improved, the mechanical equipment is prevented from being broken down, and the operating efficiency is improved. And excessive manpower is not needed in the preparation process, the labor intensity is low, the preparation cost is high, and the technology is favorable for popularization and application.

Description

Preparation method of fracturing fluid
Technical Field
The invention relates to the technical field of fracturing fluids, in particular to a preparation method of a fracturing fluid.
Background
Hydraulic fracturing is an important technical measure for increasing the production of oil and gas wells and increasing the injection of water injection wells. The hydraulic fracturing is not only widely used for low-permeability oil and gas reservoirs, but also has good effect in the yield-increasing transformation of medium-high permeability oil and gas reservoirs. The hydraulic fracturing is that a ground high-pressure pump set is utilized, fracturing fluid with propping agent is injected into a well with a discharge capacity greatly exceeding the absorption capacity of a stratum, high pressure is suppressed at the bottom of the well, when the pressure is greater than the ground stress near the wall of the well and the tensile strength of stratum rocks, cracks are generated in the stratum near the bottom of the well, the fracturing fluid with propping agent is continuously injected, the cracks extend forwards and are filled with propping agent, and after the well is closed, the cracks are closed on the propping agent, so that sand filling cracks with certain geometric size and high flow conductivity are formed in the stratum near the bottom of the well, and the purposes of increasing production and increasing injection in the well are achieved. The amount of fracturing fluid used for general construction in hydraulic fracturing operation is forty thousand to fifty thousand, and the discharge time of the fracturing fluid is different from 2 hours to 4 hours, so that a large amount of fracturing fluid needs to be prepared to meet the requirement of the hydraulic fracturing operation.
At present, in the related art, a solid thickening agent and water are mixed by a blending truck and then the fracturing fluid is conveyed to a wellhead by a conveying mechanism on the blending truck.
The inventors found that the related art has at least the following technical problems:
the fracturing fluid prepared by adopting the mixing truck has the disadvantages of numerous pipelines, complex pipeline connection, inconvenient operation, high labor intensity and high preparation cost, and is not beneficial to technical popularization and application.
Disclosure of Invention
The embodiment of the invention provides a fracturing fluid preparation method, which can solve the technical problems that a blending vehicle is adopted to prepare fracturing fluid, a plurality of pipelines are needed, the pipelines are complex to connect, the operation is inconvenient, the labor intensity is high, the preparation cost is high, and the technical popularization and the application are not facilitated. The specific technical scheme is as follows:
in one aspect, a method for preparing a fracturing fluid is provided, and the method for preparing the fracturing fluid comprises the following steps:
obtaining the adding amount of the solid additive;
adding the solid additive according to the adding amount of the solid additive;
conveying the solid additive to a mechanical conveying inlet by a wind conveying mode;
conveying the solid additive into a mixer by mechanical conveying means;
obtaining the adding amount of the liquid additive;
and adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive, and mixing to obtain the target fracturing fluid.
In an alternative embodiment, the obtaining the added amount of the solid additive comprises: and acquiring the total adding amount of the target fracturing fluid, and acquiring the adding amount of the solid additive according to the total adding amount of the target fracturing fluid.
In an alternative embodiment, said delivering said solid additive into a mixer by mechanical delivery means comprises: the solid additives are delivered to the mixer by a screw pump or gear pump.
In an alternative embodiment, said delivering said solid additive into a mixer by means of a progressive cavity pump or gear pump comprises: the screw pump or gear pump conveys the solid additive into the mixer at a conveying rate of 1Kg/min to 10 Kg/min.
In an optional embodiment, before the adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive for mixing, the method further comprises:
and obtaining the viscosity of the liquid additive, and adding the liquid additive and the solid additive into the mixer according to the viscosity of the liquid additive and the adding amount of the liquid additive for mixing to obtain the target fracturing fluid.
In an alternative embodiment, the obtaining the viscosity of the liquid additive, and adding the liquid additive and the solid additive into the mixer for mixing according to the viscosity of the liquid additive and the adding amount of the liquid additive includes: adding the liquid additive to the mixer to mix with the solid additive when the liquid additive has an apparent viscosity of less than 10 mPa.s.
In an optional embodiment, after the adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive to mix, the method further comprises:
at 5m3/min～20m3The displacement of/min injects the target fracturing fluid into the operating well.
In an optional embodiment, the solid additive comprises the following components in percentage by mass: 0.05 to 0.1 percent of drag reducer, 0.05 to 0.1 percent of bactericide and 0.2 to 0.3 percent of cleanup additive.
In an optional embodiment, the solid additive comprises the following components in percentage by mass: 0.06-0.1% of drag reducer, 0.06-0.1% of bactericide and 0.25-0.3% of cleanup additive.
In an alternative embodiment, the method is used to formulate a fracturing fluid meeting 5m3/min～20m3And meeting the requirement of the construction displacement per minute.
The technical scheme of the invention at least has the following beneficial effects:
the application avoids using excessive pipelines and is convenient to operate; carry the solid additive to mechanical delivery mouth through the wind-force mode of transportation, avoided producing the friction with mechanical equipment among the mechanical transportation process, improved conveying efficiency and avoided causing mechanical equipment trouble, improved the operating efficiency, carry the solid additive to the blender through the mechanical delivery mode, the addition of control solid that can be accurate. And excessive manpower is not needed in the preparation process, the labor intensity is low, the preparation cost is high, and the technology is favorable for popularization and application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for preparing a fracturing fluid provided in an embodiment of the present application.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The hydraulic fracturing technology is an important technology for oil and gas reservoir development, and large-scale, large-displacement and large-volume fracturing increasingly becomes the first choice for fracturing operation along with the development of engineering technology and the progress of the fracturing technology. The construction liquid amount in the fracturing operation is generally four to five thousand in square, each period of time is different from 2 to 4 hours, the traditional liquid filling preparation method in advance can not meet the requirements of the existing fracturing technology, and continuous mixing is necessary for the fracturing operation. At present, the existing continuous mixing technology mainly comprises two types: firstly, adopt the continuous blending car, utilize the special function of continuous blending car to realize on-the-spot continuous blending. However, the number of pipelines required for preparing the fracturing fluid by adopting the mixing truck is large, the pipeline connection is complex, the operation is inconvenient, the labor intensity is high, the preparation cost is high, and the technical popularization and the application are not facilitated. In view of this, the embodiments of the present application provide a method and an apparatus for preparing a fracturing fluid, which aim to solve the above technical problems.
In one aspect, a method for preparing a fracturing fluid is provided, as shown in fig. 1, the method for preparing a fracturing fluid includes:
and 101, acquiring the adding amount of the solid additive.
And 102, adding the solid additive according to the adding amount of the solid additive.
And 103, conveying the solid additive to a mechanical conveying inlet in a wind conveying mode.
Step 104, conveying the solid additive into the mixer by a mechanical conveying mode.
And 105, acquiring the adding amount of the liquid additive.
And 106, adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive, and mixing to obtain the target fracturing fluid.
The method provided by the embodiment of the application avoids using excessive pipelines and is convenient to operate; carry the solid additive to mechanical delivery mouth through the wind-force mode of transportation, avoided producing the friction with mechanical equipment among the mechanical transportation process, improved conveying efficiency and avoided causing mechanical equipment trouble, improved the operating efficiency, carry the solid additive to the blender through the mechanical delivery mode, the addition of control solid that can be accurate. And excessive manpower is not needed in the preparation process, the labor intensity is low, the preparation cost is high, and the technology is favorable for popularization and application.
The method provided by the embodiments of the present application will be further described below by way of alternative embodiments.
And 101, acquiring the adding amount of the solid additive.
In an alternative embodiment, the solid additive provided in the examples of the present application includes the following components in percentage by mass: 0.05 to 0.1 percent of drag reducer, 0.05 to 0.1 percent of bactericide and 0.1 to 0.3 percent of cleanup additive.
As an example, the mass percentage content of the resistance reducing agent may be 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, etc. The mass percentage of the bactericide may be 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, etc. The mass percentage of the cleanup additive can be 0.2%, 0.25%, 0.3% and the like.
It should be noted that the resistance reducing agent provided in the embodiment of the present application may be a polyacrylamide-based resistance reducing agent, and polymer molecules of the resistance reducing agent in the solution inhibit the generation of turbulent vortices, so that the pulsation intensity is reduced, the energy loss is reduced, and the fracturing fluid can well reduce the friction resistance of a fracturing construction pipeline. The embodiment of the present application is not limited to this.
It is noted that the biocide is effective in controlling or killing microorganisms, bacteria, fungi, algae, etc. in the formation water in the well. Fungicides can stop the growth of anaerobic bacteria in the formation, many of which become acidic due to the growth of sulfate-reducing bacteria that produce hydrogen sulfide to acidify the formation crude oil. The bactericide should be added into the fracturing fluid, so that the stability of the surface of the fracturing fluid can be maintained, and the growth of bacteria in the stratum can be prevented.
As an example, the bactericide provided by the embodiment of the application can be a quaternary ammonium salt bactericide, heavy metal salt ions have positive charges, are easy to combine with bacterial proteins with negative charges, denature the proteins and have strong bactericidal effect, and copper salt (copper sulfate) can denature bacterial protein molecules and can also combine with the protein molecules to hinder bacterial absorption.
It is noted that the cleanup additive is a chemical that can help the working residual liquid in the processes of acidification, fracturing and the like to flow back from the stratum.
As an example, the cleanup additive may be a nonionic surfactant, such as long-chain fatty alcohol polyoxyethylene ethers, alkylphenol ethoxylates, fatty acid polyoxyethylene esters, polyoxyethylene alkylamines, polyoxyethylene alkylamides, polyethers, and the like. The examples of the present application are not limited to the kind of the cleanup additive.
Optionally, step 101 comprises: and acquiring the total adding amount of the target fracturing fluid, and acquiring the adding amount of the solid additive according to the total adding amount of the target fracturing fluid.
It should be noted that the total amount of the added fracturing fluid is different, so that the content of the added solid fracturing fluid is different. When the total amount of fracturing fluid required during operation is reduced, the content of the solid additive is correspondingly reduced, and the cost increase caused by excessive addition of the solid additive is avoided. When the total amount of the fracturing fluid needed is larger, the content of the solid additive needs to be increased, so that the fracture operation failure caused by the lower content of the solid additive is avoided.
And 102, adding the solid additive according to the adding amount of the solid additive.
It should be noted that, in the method provided in the examples of the present application, the solid additive is formulated in a container, so that the components of the solid additive are uniformly mixed.
And 103, conveying the solid additive to a mechanical conveying inlet in a wind conveying mode.
It is noted that the wind power conveying pipeline is flexibly configured, so that the preparation process flow is more reasonable; the conveying system is completely closed, the dust is less flying, and the environmental protection requirement can be realized; during the conveying process, various operation processes such as mixing, crushing, grading, drying, cooling, dedusting and the like can be realized simultaneously. The material concentrated by several points can be sent to one place or one place can be sent to several dispersed points, and the remote operation can be realized. For materials with unstable chemical substances, inert pneumatic conveying can be adopted.
In the embodiment of the application, the wind power conveying is adopted, so that friction between the solid additive and the pipeline and other equipment can be avoided, and the conveying efficiency is improved.
As an example, the pneumatic conveying provided by the embodiment of the application can adopt a pneumatic conveyor to complete the conveying of the solid additive.
Step 104, conveying the solid additive into the mixer by a mechanical conveying mode.
The wind power conveying has the characteristics of large conveying capacity and fast conveying speed, but the phenomenon that the conveying capacity is difficult to control due to instability exists in the wind power conveying process, so that the wind power conveying mode is adopted when the solid additive is conveyed to the mechanical conveying inlet in the embodiment of the application. Mechanical conveying is used when the solid additive is conveyed into the mixer.
The mechanical conveying means that bulk materials and articles are conveyed or conveyed along a certain route in a continuous, uniform and stable conveying manner by using a conveying machine. The mechanical conveying can well control the conveying amount of the solid additive.
Therefore, the solid additive is conveyed to the inlet of the mechanical conveying in a wind conveying mode, so that the friction between the solid additive and mechanical equipment is reduced, and the conveying efficiency is improved; and controlling the content of the solid additive by a mechanical conveying mode.
It should be noted that, when the solid additive is respectively conveyed by the wind conveying device and the conveying machine, four pipelines may be provided, one end of the first pipeline and one end of the first spare pipeline are both connected with the wind conveying device, and the other end of the first spare pipeline is both connected with the conveying machine; the second pipeline and the standby one end of the second pipeline are both connected with the conveying machinery, and the other ends of the second pipeline and the standby one end of the second pipeline are both connected with the mixer. Therefore, when any one pipeline in wind power conveying or mechanical conveying fails, the standby pipeline can be started in time, and normal operation of operation is guaranteed.
Further, the solid additive in step 104 can only be delivered to the mixer by the delivery mechanism, but cannot be returned from the mixer back to the delivery mechanism. Correspondingly, a one-way valve can be arranged between the conveying machine and the mixer so as to achieve the aim of avoiding the backflow of the solid additive.
Optionally, step 104 comprises: the solid additives are delivered to the mixer by a screw pump or gear pump.
Optionally, step 104 comprises: the screw pump or gear pump delivers the solid additive into the mixer at a delivery rate of 1Kg/min to 10 Kg/min.
That is to say, the running speed of the screw pump and the gear pump is kept between 1Kg/min and 10Kg/min, and when the running speed is 0L/min, the screw pump and the gear pump stop running.
And 105, acquiring the adding amount of the liquid additive.
It should be noted that the liquid additive in the embodiment of the present application may be selected from any one of a cleanup additive, an anti-swelling agent, a bactericide, a breaker, or a viscosity modifier.
As an example, the cleanup additive may be a nonionic surfactant of polyoxyethylene type, polyol type, alkanolamide type, polyether type, amine oxide type, or the like. The examples of the present application are not limited to the kind of the cleanup additive.
The anti-swelling agent can be an organic cationic polymer, and the kind of the organic cationic polymer is not limited in the examples of the application. The gel breaker can be a mixture of potassium persulfate and ammonium persulfate, and the type of the gel breaker is not limited in the embodiments of the application.
It should be noted that the content of the liquid additive needs to be determined according to the total amount of the fracturing fluid. The content of the solid additive in the fracturing fluid is matched with the content of the liquid additive, and the fracturing effect of the fracturing fluid is ensured. The addition amounts of the liquid additive and the solid additive are determined according to the operation requirements, and the examples of the application do not limit the addition amounts.
And 106, adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive, and mixing to obtain the target fracturing fluid.
Optionally, before step 106, the method further comprises:
and obtaining the viscosity of the liquid additive, and adding the liquid additive and the solid additive into the mixer according to the viscosity of the liquid additive and the adding amount of the liquid additive for mixing to obtain the target fracturing fluid.
It should be noted that the viscosity of the liquid additive affects the fluidity of the fracturing fluid, so that the viscosity of the liquid additive can be obtained, and the liquid additive is added according to the viscosity when the viscosity of the liquid additive reaches a preset value.
Optionally, the liquid additive is added to the mixer at an apparent viscosity of less than 10mpa.s to mix with the solid additive.
As an example, the viscosity of the liquid additive may be measured using a viscometer. The method for obtaining the viscosity of the liquid additive is not limited in the embodiments of the present application.
Optionally, after step 106, the method further comprises: at 5m3/min～20m3The displacement of/min injects the target fracturing fluid into the operating well.
Further, the liquid additive and the solid additive can be sent into a surface pipeline through a sand mixing truck, and enter a shaft and a reservoir stratum to complete the fracturing operation.
Based on the adoption of the preparation method, the prepared fracturing fluid can meet the requirement of 5m3/min～20m3The requirement of the displacement of fracturing construction per minute; can simultaneously complete continuous mixing of 10 solid additives and combinations thereof. The method provided by the embodiment of the application can also enable the filling proportion of the solid additive and the design error to be less than or equal to 2%; the dissolving time of the solid additive is less than 40 seconds, and the dissolving time of the solid additive is reduced.
It should be noted that, the content of the solid additive and the content of the liquid additive in the method provided by the embodiment of the present application can be controlled by the controller to perform the feeding. As an example, the controller can be connected with the device for containing the solid additive and the device for containing the liquid additive, and the switch and the closing of the controller are controlled by the terminal to control the adding amount of the solid additive and the liquid additive, so that automatic feeding is realized. As an example, the terminal may be a mobile phone, a computer, or the like, and the type of the terminal is not limited thereto in the embodiments of the present application.
The preparation method of the fracturing fluid provided by the embodiment of the application has the advantages of low cost, convenience in operation and low labor intensity; the prepared fracturing fluid is uniform and has no fish eyes, and the requirement of continuous blending of the fracturing fluid is met; and the liquid additive can not return in the pipeline, the solid additive can not block the conveying pipeline in the preparation process, and the adding proportion precision is high.
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below.
Example 1
The solid additive in the first oil well site construction comprises the following components in percentage by mass: 0.05 percent of drag reducer, 0.05 percent of bactericide and 0.2 percent of cleanup additive, and the construction discharge capacity is 15m3/min。
Taking 50kg of resistance reducing agent, wherein the filling speed of the resistance reducing agent is 7.5kg/min, simultaneously respectively filling the bactericide and the discharge assistant agent into liquid tanks, firstly conveying the solid additive in the liquid tank to the inlet of a screw pump of a sand mixing truck through wind power, then adding the resistance reducing agent, the bactericide, the discharge assistant agent and the liquid additive into a mixer according to the mass percent of the components through the screw pump of the sand mixing truck, uniformly mixing, and then delivering the mixture into a shaft and a stratum.
And (3) field test and construction results: the fracturing fluid is uniformly prepared without fish eyes, and the construction drag reduction rate is 73%, so that the requirement of fracturing construction is met.
Example 2
The solid additive in the second oil well site construction comprises the following components in percentage by mass: 0.05 percent of drag reducer, 0.05 percent of bactericide and 0.2 percent of cleanup additive, and the construction discharge capacity is 8m3/min。
Taking 50kg of resistance reducing agent, wherein the filling speed of the resistance reducing agent is 4kg/min, simultaneously respectively filling the bactericide and the discharge assistant agent into liquid tanks, firstly conveying the solid additive in the liquid tank to the inlet of a screw pump of the sand mixing truck through wind power, then adding the resistance reducing agent, the bactericide, the discharge assistant agent and the liquid additive into a mixer according to the mass percent of the components through the screw pump of the sand mixing truck, uniformly mixing, and then delivering the mixture into a shaft and a stratum.
And (3) field test and construction results: the fracturing fluid is prepared uniformly without fisheyes, and the construction drag reduction rate is 74%, so that the requirement of fracturing construction is met.
Example 3
The solid additive in the site construction of the third oil well comprises the following components in percentage by mass: 0.4 percent of guar gum, 0.3 percent of bactericide, 1 percent of cleanup additive, 0.5 percent of clay stabilizer, 0.6 percent of cross-linking agent and 0.2 percent of gel breaker, wherein the construction displacement is 5m3/min。
Taking 50kg of resistance reducing agent, wherein the filling speed of the resistance reducing agent is 20kg/min, simultaneously respectively filling the bactericide and the discharge assistant agent into liquid tanks, firstly conveying the solid additive in the liquid tank to the inlet of a screw pump of the sand mixing truck through wind power, then adding the resistance reducing agent, the bactericide, the discharge assistant agent and the liquid additive into a mixer according to the mass percent of the components through the screw pump of the sand mixing truck, uniformly mixing, and then delivering the mixture into a shaft and a stratum.
And (3) field test and construction results: the fracturing fluid is prepared uniformly without fish eyes, has the viscosity of 750mPa.s, and meets the requirements of fracturing construction.
Example 4
The solid additive in the site construction of the fourth oil well comprises the following components in percentage by mass: 0.35% of guar gum, 0.3% of bactericide, 1% of cleanup additive, 0.5% of clay stabilizer, 0.6% of cross-linking agent and 0.2% of gel breaker, wherein the construction displacement is 3.5m3/min。
50kg of guar gum is taken, the filling speed of the guar gum is 13kg/min, meanwhile, the bactericide, the cleanup additive, the clay stabilizer, the crosslinking agent and the gel breaker are respectively filled into a liquid tank, the solid additive in the liquid tank is firstly conveyed to the inlet of a screw pump of a sand mixing truck through wind power conveying, then the drag reducer, the bactericide, the cleanup additive and the liquid additive are added into a mixer according to the mass percentage of each component through the screw pump of the sand mixing truck and are uniformly mixed, and then the mixture enters and exits a shaft and a stratum.
And (3) field test and construction results: the fracturing fluid is uniformly prepared without fish eyes, the viscosity of the fracturing fluid is 695mPa.s, and the requirements of fracturing construction are met.
Example 5
The solid additive in the fifth oil well site construction comprises the following components in percentage by mass: 0.4 percent of guar gum, 0.3 percent of bactericide, 1 percent of cleanup additive, 0.5 percent of clay stabilizer, 0.6 percent of cross-linking agent and 0.2 percent of gel breaker, wherein the construction displacement is 3.5m3/min。
50kg of guar gum is taken, the filling speed of the guar gum is 13kg/min, meanwhile, the bactericide, the cleanup additive, the clay stabilizer, the crosslinking agent and the gel breaker are respectively filled into a liquid tank, the solid additive in the liquid tank is firstly conveyed to the inlet of a screw pump of a sand mixing truck through wind power conveying, then the drag reducer, the bactericide, the cleanup additive and the liquid additive are added into a mixer according to the mass percentage of each component through the screw pump of the sand mixing truck and are uniformly mixed, and then the mixture enters and exits a shaft and a stratum.
And (3) field test and construction results: the fracturing fluid is uniformly prepared without fish eyes, the viscosity of the fracturing fluid is 700mPa.s, and the requirement of fracturing construction is met.
The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A preparation method of fracturing fluid is characterized by comprising the following steps:
obtaining the adding amount of the solid additive;
adding the solid additive according to the adding amount of the solid additive;
conveying the solid additive to a mechanical conveying inlet by a wind conveying mode;
conveying the solid additive into a mixer by mechanical conveying means;
obtaining the adding amount of the liquid additive;
and adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive, and mixing to obtain the target fracturing fluid.
2. The fracturing fluid formulation method of claim 1, wherein obtaining the amount of added solid additive comprises: and acquiring the total adding amount of the fracturing fluid, and acquiring the adding amount of the solid additive according to the total adding amount of the target fracturing fluid.
3. The fracturing fluid formulation method of claim 1, wherein said delivering the solid additive into the mixer by mechanical delivery comprises: the solid additives are delivered to the mixer by a screw pump or gear pump.
4. The fracturing fluid formulation method of claim 3, wherein the delivering the solid additive into the mixer by a progressive cavity pump or a gear pump comprises: the screw pump or gear pump delivers the solid additive to the mixer at a delivery rate of 01Kg/min to 10 Kg/min.
5. The method of claim 1, wherein the method further comprises, before adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive and mixing to obtain the target fracturing fluid:
and obtaining the viscosity of the liquid additive, and adding the liquid additive and the solid additive into the mixer according to the viscosity of the liquid additive and the adding amount of the liquid additive for mixing to obtain the target fracturing fluid.
6. The fracturing fluid preparation method of claim 5, wherein the obtaining of the viscosity of the liquid additive, and the adding of the liquid additive and the solid additive into the mixer according to the viscosity of the liquid additive and the adding amount of the liquid additive for mixing comprises: adding the liquid additive to the mixer to mix with the solid additive when the liquid additive has an apparent viscosity of less than 10 mPa.s.
7. The method for preparing fracturing fluid according to claim 1, wherein after the adding the liquid additive and the solid additive into the mixer according to the adding amount of the liquid additive and mixing to obtain the target fracturing fluid, the method further comprises:
at 5m3/min～20m3The displacement of/min injects the target fracturing fluid into the operating well.
8. The method for preparing the fracturing fluid according to any one of claims 1 to 7, wherein the solid additive comprises the following components in percentage by mass: 0.05 to 0.1 percent of drag reducer, 0.05 to 0.1 percent of bactericide and 0.2 to 0.3 percent of cleanup additive.
9. The method for preparing the fracturing fluid according to any one of claims 1 to 8, wherein the solid additive comprises the following components in percentage by mass: 0.06-0.1% of drag reducer, 0.06-0.1% of bactericide and 0.25-0.3% of cleanup additive.
10. The method for preparing fracturing fluid according to any one of claims 1 to 8, wherein the method prepares the fracturing fluid to meet the requirement of 5m3/min～20m3And meeting the requirement of the construction displacement per minute.
CN202010367602.6A 2020-04-30 2020-04-30 Preparation method of fracturing fluid Pending CN113578088A (en)

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Citations (4)

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CN103694985A (en) * 2014-01-08 2014-04-02 四川川庆井下科技有限公司 Continuous mixing fracturing fluid system
CN105753344A (en) * 2016-02-26 2016-07-13 北京建筑材料科学研究总院有限公司 Device and method for producing cement raw material from waste fly ash
CN106522910A (en) * 2015-09-11 2017-03-22 S.P.C.M.股份公司 Equipment and method enabling to directly use powder polymer in hydraulic fracturing
CN206887128U (en) * 2017-07-12 2018-01-16 浙江景兴纸业股份有限公司 A kind of ative starch air blowing feeding device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103694985A (en) * 2014-01-08 2014-04-02 四川川庆井下科技有限公司 Continuous mixing fracturing fluid system
CN106522910A (en) * 2015-09-11 2017-03-22 S.P.C.M.股份公司 Equipment and method enabling to directly use powder polymer in hydraulic fracturing
CN105753344A (en) * 2016-02-26 2016-07-13 北京建筑材料科学研究总院有限公司 Device and method for producing cement raw material from waste fly ash
CN206887128U (en) * 2017-07-12 2018-01-16 浙江景兴纸业股份有限公司 A kind of ative starch air blowing feeding device

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