CN113404478A - Shale gas full-electric automatic fracturing operation equipment and method - Google Patents
Shale gas full-electric automatic fracturing operation equipment and method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 149
- 239000007788 liquid Substances 0.000 claims abstract description 136
- 238000002156 mixing Methods 0.000 claims abstract description 132
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000012530 fluid Substances 0.000 claims description 58
- 239000002253 acid Substances 0.000 claims description 32
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
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- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000010354 integration Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000000243 solution Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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Abstract
The invention discloses a shale gas full-electric automatic fracturing operation device and a method, wherein the shale gas full-electric automatic fracturing operation device comprises the following steps: the 35kV high-voltage room is connected with a 35kV high-voltage power supply from a power grid; the 10kV high-voltage room is connected with the 35kV high-voltage room through a high-voltage cable; the electric fracturing pump is connected with a power supply from a variable frequency power supply room; the liquid storage tank is divided into a clear water liquid storage tank and a mixed liquid storage tank, and a suction inlet of the electric liquid supply sledge is connected with a water source; the clear water storage tank is connected with an electric mixing sledge pipeline; the blending liquid storage tank is connected with an electric sand mixing skid pipeline; the electric sand mixing sledge is connected with a mixed liquid storage tank and a sand storage tank; the electric sand mixing sledge is connected with a high-low pressure manifold sledge pipeline, and the electric fracturing pump is connected with the high-low pressure manifold sledge pipeline. Compared with the original operation mode, the full-automatic shale gas fracturing method reduces the occupied area of a well site; the automation degree of the equipment is high, and the number of operators of the equipment is reduced.
Description
Technical Field
The invention relates to the field of fracturing operation, in particular to shale gas full-electric automatic fracturing operation equipment and method.
Background
At present, the fracturing operation is mainly completed by commanding and commanding a construction commander to an equipment operator, so that the problems of low communication efficiency, more operators, more intermediate links, easiness in misoperation and the like exist, and the whole fracturing operation process belongs to an experience control stage.
The automatic fracturing operation is based on the automation of fracturing matching equipment, and the fracturing operation information is monitored in real time by a closed-loop automatic control system for improving the fracturing operation efficiency and reducing the number of operators.
The main steps of fracturing construction comprise perforation, fracturing testing, circulation, pressure testing, squeezing testing, pad fluid, sand carrying fluid, displacing fluid and pressure drop testing, equipment and control targets related to each stage are different, and a control method needs to be discussed respectively according to the stages. The equipment involved in the perforation stage comprises a wellhead valve, a pumping manifold outlet valve, a pump skid valve, a fracturing pump, a liquid supply skid, a water storage tank and the like.
The invention patent application document with the application number of CN201610458683.4 summarizes and provides an ocean oil and gas fracturing operation information interaction system, which comprises a fracturing operation instrument sledge, an ocean oil and gas fracturing operation information integration device and a ship information center; the ship information center is a monitoring center for remotely monitoring the current operation of the fracturing operation and is responsible for monitoring the states of all system equipment of the whole ship, monitoring marine environment information and issuing commands for guiding the fracturing operation; the fracturing operation instrument sledge realizes real-time acquisition of fracturing operation field data and sends the data to the marine oil and gas fracturing operation information integration device through a serial port; the marine oil and gas fracturing operation information integration device carries out bidirectional information interaction with a ship information center through a network communication mechanism; the marine oil and gas fracturing operation information integration device is provided with a virtual local area network to finish the isolation of the internal information transmission of the device. The invention can solve the problems of short transmission distance, low automation degree, difficulty in remote monitoring and control and the like of the existing marine oil and gas fracturing operation. However, the equipment mainly aims at ocean oil and gas fracturing operation, the application problem of the existing shale gas fracturing operation cannot be solved, and the equipment has the problems of high energy consumption, large noise, large occupied area, high pollutant emission, high long-term operation and maintenance cost and the like.
Disclosure of Invention
The invention aims to overcome the problems that in the prior art, the shale gas fracturing operation mostly adopts main pumping and injecting pressurization equipment for diesel fracturing unit operation, the equipment has high energy consumption, high noise, large occupied area, high pollutant emission, high long-term operation and maintenance cost and the like, and provides full-automatic shale gas fracturing operation equipment and a method.
The purpose of the invention is realized by the following technical scheme:
a shale gas full-electric automatic fracturing operation equipment comprises: the system comprises a 35kV high-voltage room, a 10kV high-voltage room, a variable frequency power supply room, an electric fracturing pump, an instrument sledge, an electric sand mixing sledge, an electric liquid supply sledge, a sand storage tank, automatic sand conveying equipment, a liquid storage tank, an acid storage tank and a high-low pressure manifold sledge; wherein:
the 35kV high-voltage room is connected with a 35kV high-voltage power supply from a power grid, and the power supply is converted into a 10kV power supply; the 10kV high-voltage room is connected with the 35kV high-voltage room through a high-voltage cable, a plurality of paths of 10kV power supplies are fed out, and meanwhile the 10kV power supplies are converted into 400V; the 10kV high-voltage room is respectively and electrically connected with the variable-frequency power supply room, the electric sand mixing sledge, the instrument sledge, the electric mixing sledge, the sand storage tank, the liquid storage tank, the acid storage tank and the electric liquid supply sledge; the electric fracturing pump is connected with a power supply from a variable frequency power supply room and used for converting electric energy into kinetic energy of fracturing fluid, and the fracturing fluid is injected into the underground through a manifold to fracture a stratum;
the liquid storage tank is divided into a clear water liquid storage tank and a mixed liquid storage tank, the suction inlet of the electric liquid supply sledge is connected with a water source, and the liquid inlet of the clear water liquid storage tank is connected with the output port of the electric liquid supply sledge through a pipeline; the clear water storage tank is connected with an electric mixing sledge pipeline; the electric mixing sledge dissolves and mixes the powder, the additive and the clear water to prepare fracturing fluid, and the fracturing fluid is discharged out of the centrifugal pump and injected into the mixed fluid storage tank; the blending liquid storage tank is connected with an electric sand mixing skid pipeline; the automatic sand conveying equipment conveys the proppant to a sand storage tank; the electric sand mixing sledge is connected into the mixed fracturing fluid in the mixed fluid storage tank and the propping agent in the sand storage tank, and the fracturing fluid and the propping agent are mixed; the electric sand mixing sledge is connected with a high-low pressure manifold sledge pipeline, and the electric fracturing pump is connected with the high-low pressure manifold sledge pipeline.
Preferably, the instrument sledge is connected with and controls a 35kV high-voltage room, a 10kV high-voltage room, a variable frequency power supply room, an electric fracturing pump, an electric sand mixing sledge, an electric liquid supply sledge, a sand storage tank, an automatic sand conveying device, a liquid storage tank, an acid storage tank and a high-low pressure manifold sledge through a network bus.
Preferably, the 35kV high-voltage room comprises a main transformer and a 35kV high-voltage switch cabinet, the 35kV high-voltage switch cabinet comprises a bus-bar lifting cabinet, the primary side voltage of the main transformer is 35kV, and the secondary side voltage is 10kV or 10.5 kV; the 10kV high-voltage room comprises at least one high-voltage switch device, one or two 10 kV/0.4 kV transformers, a set of low-voltage switch device and at least one set of low-voltage connector; the variable frequency power supply room comprises 1-2 phase-shifting transformers, 1-2 frequency converters and 1-2 sets of PLC control systems, wherein primary side voltage of the phase-shifting transformers is 10kV, secondary side voltage of the phase-shifting transformers is 1.8kV-2.1kV, rectification topology of the frequency converters is over 12 pulses, and the PLC control systems monitor current, voltage and torque output by the frequency converters.
Preferably, the electric fracturing pump comprises a main motor, at least one auxiliary equipment motor, a sensor and at least one fracturing pump, and a rotating shaft of the main motor is connected with a crankshaft of the fracturing pump through a coupling or a gear; the rated voltage of the main motor is 3.3 kV or 6 kV; the auxiliary equipment motor is used for driving auxiliary equipment; the fracturing pump is a three-cylinder pump or a five-cylinder pump, and the rated water horsepower of the fracturing pump is 2500HP or above; the electric sand mixing sleds comprise at least one sand mixing sledge motor, at least two sand mixing sledge centrifugal pumps and at least two sets of spiral conveying equipment, wherein the sand mixing sledge motor is used for driving the sand mixing sledge centrifugal pumps and the spiral conveying equipment, the sand mixing sledge centrifugal pumps are used for pressurizing fracturing base fluid and mixed liquor, and the spiral conveying equipment is used for conveying a propping agent into a mixing tank or a mixing pump; the electric mixing sledge comprises at least two mixing sledge centrifugal pumps and a mixing sledge motor, the electric mixing sledge is connected with a PLC control system, the mixing sledge centrifugal pumps are connected with the mixing sledge motor, and the PLC control system remotely controls the liquid distribution displacement and concentration setting; the electric liquid supply sledge comprises a liquid supply sledge centrifugal pump, a liquid supply sledge motor, an electromagnetic flow meter, a pressure sensor and a set of electric control cabinet, wherein the electric control cabinet is connected with a PLC control system, the pressure closed-loop control is realized by collecting the liquid pressure discharged by the liquid supply sledge centrifugal pump, and the electric liquid supply sledge realizes remote control through the PLC control system.
Preferably, the sand storage tank is used for storing fracturing propping agents and comprises at least one feeding hole and a discharging hole, and electric valves for switching the flowing-in and flowing-out of the propping agents are arranged at the feeding hole and the discharging hole; the automatic sand conveying equipment is used for conveying the propping agent to the sand storage tank and comprises at least one horizontal spiral conveyor and at least one vertical spiral conveyor, the automatic sand conveying equipment is connected with an electric control cabinet, and the electric control cabinet is used for controlling the positive and negative rotation of the automatic sand conveying equipment; the liquid storage tank is used for storing fracturing liquid and comprises at least two liquid inlets and outlets, the liquid inlets and outlets are provided with electric butterfly valves corresponding to the liquid inlets and outlets, the electric butterfly valves for storing the same liquid storage tank are in linkage operation, and a liquid storage cavity is a flexible bag cavity formed by a metal folding frame and a flexible water bag or a cuboid liquid storage cavity formed by enclosing of metal plates; the acid storage tank is used for storing acid liquor for fracturing and comprises an outlet electric ball valve, and the electric ball valve is used for receiving a remote control signal to be opened or closed.
A shale gas full-electric automatic fracturing operation method comprises the following steps:
s1: supplying water to the clear water liquid storage tank through the electric liquid supply pry;
s2: mixing the fracturing fluid, and storing the mixed fracturing fluid in a mixed fluid storage tank;
s3: conveying the proppant to a sand storage tank through automatic sand conveying equipment;
s4: conveying part of fracturing fluid in the mixed fluid storage tank and part of proppant in the sand storage tank to an electric sand mixing skid for sand mixing to form sand mixing fluid;
s5: controlling the electric sand mixing pry to discharge the rotating speed of the centrifugal pump, and providing sand mixing liquid for the electric fracturing pump;
s6: controlling the rotating speed of a motor of the electric fracturing pump, and injecting sand mixing liquid into the fracturing manifold;
s7: and controlling the rotating speed of a motor of the electric fracturing pump based on the pump injection program table.
Preferably, the step S1 is preceded by the steps of:
s00: the acid storage tank provides acid liquor for the electric liquid supply pry;
s01: controlling the opening and closing of an electric valve on a discharge manifold of the acid storage tank to supply acid to the electric liquid supply pry;
s02: and controlling the opening and closing of an electric valve on the discharge manifold of the acid storage tank based on a pump injection program table.
Preferably, the S2 specifically includes the following steps:
s21: controlling an electric mixing sledge to suck a centrifugal pump, sucking clear water from a clear water storage tank, and supplying liquid to a mixer and a mixing tank;
s22: controlling the rotating speed of the suction centrifugal pump based on the flow of the clean water;
s23: controlling a powder feeding screw based on the set concentration of the mixed solution, and injecting the medicinal powder into the mixer;
s24: controlling the rotational speed of the centrifugal mixing pump based on the mixer inlet pressure;
s25: controlling and discharging the centrifugal pump, and supplying the prepared fracturing fluid to the liquid storage tank;
s26: and controlling the rotating speed of the discharge centrifugal pump based on the liquid level height of the mixing tank.
Preferably, the S4 specifically includes the following steps:
s41: controlling the electric sand mixing pry to suck fracturing fluid from the mixed fluid storage tank, and accessing proppant from the sand storage tank;
s42: controlling the rotation speed of the sand conveying screw and conveying the propping agent to the electric sand mixing pry;
s43: and controlling the rotation speed of the conveying sand screw based on a pump injection program table.
Preferably, the S3 specifically includes the following steps:
s31: providing a propping agent to a bag breaking port of automatic sand conveying equipment from a ton bag, controlling the opening and closing of an electric gate valve at a feed port of a sand storage tank, and conveying different kinds of propping agents into corresponding bin positions;
s32: controlling the switch of the electric gate valve based on the material type of the feeding hole;
s33: controlling the switch of an electric gate valve at the discharge hole of the sand storage tank to convey different types of proppants into an electric sand mixing hopper;
s34: and controlling the electric valve switch at the discharge hole of the sand storage tank based on the pump injection program table.
The invention has the beneficial effects that:
compared with the original operation mode, the shale gas full-electric automatic fracturing reduces the occupied area of a well site; the automation degree of the equipment is high, and the number of operators of the equipment is reduced; the electric fracturing equipment is powered by electricity, the electric equipment has no carbon oxide, the noise level of the electric fracturing equipment is greatly reduced compared with that of the original diesel oil equipment, and the electric fracturing operation is clean and environment-friendly; the automation of fracturing operation is realized, the fracturing process is automatically controlled according to a pump injection meter, and the fracturing consistency is ensured; the auxiliary equipment only needs one person to remotely operate liquid supply and sand conveying, so that the number of people is reduced; the high-altitude operation post is avoided, the risk post is reduced, and the unmanned construction area of the well site is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of an overall apparatus of the present invention;
FIG. 2 is a schematic diagram of the shale gas full-automatic fracturing operation pipeline connection of the present invention;
FIG. 3 is a schematic diagram of proppant piping connections for a shale gas fully automated fracturing operation of the present invention;
FIG. 4 is a flow chart of the water supply of the present invention;
FIG. 5 is a compounding flow diagram of the present invention;
FIG. 6 is a sand transporting flow diagram according to the present invention;
FIG. 7 is a flow chart of the present invention for supplying liquid;
FIG. 8 is a flow diagram of the acid supply of the present invention;
FIG. 9 is a sand mulling flow diagram of the present invention;
FIG. 10 is a pump flow diagram of the present invention;
the reference numbers illustrate:
1-35kV high-voltage room, 2-10kV high-voltage room, 3-variable frequency power supply room, 4-electric fracturing pump, 5-instrument sledge, 6-electric sand mixing sledge, 7-electric mixing sledge, 8-electric liquid supply sledge, 9-sand storage tank, 10-automatic sand conveying equipment, 11-liquid storage tank, 12 acid storage tank and 13 high-low pressure manifold sledge;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
In this embodiment, as shown in fig. 1, a shale gas full-electric automatic fracturing operation device includes: the device comprises a 35kV high-voltage room 1, a 10kV high-voltage room 2, a variable frequency power supply room 3, an electric fracturing pump 4, an instrument skid 5, an electric sand mixing skid 6, an electric mixing skid 7, an electric liquid supply skid 8, a sand storage tank 9, an automatic sand conveying device 10, a liquid storage tank 11, an acid storage tank 12 and a high-low pressure manifold skid 13; wherein:
the 35kV high-voltage room 1 is connected with a 35kV high-voltage power supply from a power grid and converts the power supply into a 10kV power supply; the 10kV high-voltage room 2 is connected with the 35kV high-voltage room 1 through a high-voltage cable, a plurality of paths of 10kV power supplies are fed out, and meanwhile the 10kV power supplies are converted into 400V; the 10kV high-voltage room 2 is respectively and electrically connected with a variable-frequency power supply room 3, an electric sand mixing sledge 6, an instrument sledge 5, an electric mixing sledge 7, a sand storage tank 9, a liquid storage tank 11, an acid storage tank 12 and an electric liquid supply sledge 8; the electric fracturing pump 4 is connected with a power supply from the variable frequency power supply room 3 and is used for converting electric energy into kinetic energy of fracturing fluid, and injecting the fracturing fluid into the underground through a manifold to fracture a stratum;
the liquid storage tank 11 is divided into a clear water liquid storage tank and a mixed liquid storage tank, a suction inlet of the electric liquid supply sledge 8 is connected with a water source, and a liquid inlet of the clear water liquid storage tank is connected with an output port pipeline of the electric liquid supply sledge 8; the clear water liquid storage tank is connected with an electric blending sledge 7 through a pipeline; the electric mixing sledge 7 dissolves and mixes the powder, the additive and the clear water to prepare fracturing fluid and injects the fracturing fluid into the mixed fluid storage tank through a pipeline; the blending liquid storage tank is connected with an electric sand mixing skid 6 through a pipeline; the automatic sand conveying equipment 10 conveys the proppant to the sand storage tank 9; the electric sand mixing sledge 6 is connected into the mixed fracturing fluid in the mixed fluid storage tank and the propping agent in the sand storage tank 9, and the fracturing fluid and the propping agent are mixed; the electric sand mixing sledge 6 is connected with a high-low pressure manifold sledge 13 through a pipeline, and the electric fracturing pump 4 is connected with the high-low pressure manifold sledge 13 through a pipeline.
Specifically, as shown in fig. 2, the suction inlet of 2 electric liquid supply sledges 8 is connected with a water source, the liquid inlet of a part of the liquid storage tank 11 is connected with the electric liquid supply sledges 8, and the part of the liquid storage tank 11 is used for storing clear water; the clear water liquid storage tank 11 is connected with the electric mixing sledge 7, the electric mixing sledge 7 is connected with a part of liquid storage tank 11, and the part of liquid storage tank 11 is used for storing the liquid after mixing; the mixed liquid storage tank is connected with a sand mixing sledge, the sand mixing sledge is connected with a high-low pressure manifold sledge 13, and the electric fracturing pump 4 is connected with the high-low pressure manifold sledge 13.
In this embodiment, the instrument skid 5 is connected to and controls the 35kV high-voltage room 1, the 10kV high-voltage room 2, the variable frequency power supply room 3, the electric fracturing pump 4, the electric sand mixing skid 6, the electric mixing skid 7, the electric liquid supply skid 8, the sand storage tank 9, the automatic sand conveying equipment 10, the liquid storage tank 11, the acid storage tank 12, and the high-low pressure manifold skid 13 through a network bus.
Specifically, as shown in fig. 3, the automatic sand conveying device 10 is connected to the sand storage tank 9, and the sand storage tank 9 is connected to the electric sand mixing skid 6.
In this embodiment, the 35kV high-voltage room 1 includes a main transformer and a 35kV high-voltage switch cabinet, the 35kV high-voltage switch cabinet includes a bus lifting cabinet, the primary transformation of the main transformer is 35kV, and the secondary transformation is 10 kV; the 10kV high-voltage room 2 comprises at least one high-voltage switch device, one or two 10 kV/0.4 kV transformers, a set of low-voltage switch device and at least one set of low-voltage connector; the variable frequency power supply room 3 comprises 1-2 phase-shifting transformers, 1-2 frequency converters and 1-2 sets of PLC control systems, wherein the primary side voltage of each phase-shifting transformer is 10kV, the secondary side voltage of each phase-shifting transformer is 1.8kV-2.1kV, the rectification topology of each frequency converter is over 12 pulses, and the PLC control systems monitor the current, the voltage and the torque output by the frequency converters.
In this embodiment, the electric fracturing pump 4 includes a main motor, at least one auxiliary device motor, a sensor and at least one fracturing pump, and a rotating shaft of the main motor is connected with a crankshaft of the fracturing pump through a coupling or a gear; the rated voltage of the main motor is 3.3 kV or 6 kV; the auxiliary equipment motor is used for driving auxiliary equipment; the fracturing pump is a three-cylinder pump or a five-cylinder pump, and the rated water horsepower of the fracturing pump is more than 2500 HP; the electric sand mixing sledge 6 comprises at least one sand mixing sledge motor, at least two sand mixing sledge centrifugal pumps and at least two sets of spiral conveying equipment, wherein the sand mixing sledge motor is used for driving the sand mixing sledge centrifugal pumps and the spiral conveying equipment, the sand mixing sledge centrifugal pumps are used for pressurizing fracturing base fluid and mixed liquid, and the spiral conveying equipment is used for conveying a propping agent into a mixing tank or a mixing pump; the electric mixing sledge 7 comprises at least two mixing sledge centrifugal pumps and mixing sledge motors, the electric mixing sledge 7 is connected with a PLC control system, the mixing sledge centrifugal pumps are connected with the mixing sledge motors, and the PLC control system remotely controls the discharge capacity and concentration setting of the prepared liquid; the electric liquid supply sledge 8 comprises a liquid supply sledge centrifugal pump, a liquid supply sledge motor, an electromagnetic flow meter, a pressure sensor and a set of electric control cabinet, wherein the electric control cabinet is connected with a PLC control system, the pressure closed-loop control is realized by collecting liquid fracturing discharged by the liquid supply sledge centrifugal pump, and the electric liquid supply sledge 8 realizes remote control through the PLC control system.
In this embodiment, the sand storage tank 9 is used for storing fracturing propping agent, and includes at least one feed inlet and a discharge outlet, and electric valves for switching the inflow and outflow of the propping agent are arranged at the feed inlet and the discharge outlet; the automatic sand conveying equipment 10 is used for conveying a propping agent to the sand storage tank 9 and comprises at least one horizontal screw conveyor and at least one vertical screw conveyor, the automatic sand conveying equipment 10 is connected with an electric control cabinet, and the electric control cabinet is used for controlling the positive and negative rotation of the automatic sand conveying equipment 10; the liquid storage tank 11 is used for storing fracturing fluid and comprises at least two liquid inlets and outlets and a liquid storage cavity, the liquid inlets and outlets are provided with electric butterfly valves corresponding to the liquid inlets and outlets, the electric butterfly valves for storing the same liquid storage tank are operated in a linkage manner, and the liquid storage cavity is a flexible bag cavity formed by a metal folding frame and a flexible water bag or a cuboid liquid storage cavity formed by enclosing of metal plates; the acid storage tank 12 is used for storing acid liquor for fracturing and comprises an outlet electric ball valve which is used for receiving a remote control signal to be opened or closed.
As shown in fig. 4 to fig. 10, in the present embodiment, a shale gas full-electric automatic fracturing operation method is provided, which includes the following steps:
s1: the clear water storage tank is supplied with water through the electric liquid supply pry 8;
s2: mixing the fracturing fluid, and storing the mixed fracturing fluid in a mixed fluid storage tank;
s3: conveying the proppant to a sand storage tank 9 through an automatic sand conveying device 10;
s4: conveying part of fracturing fluid in the blending fluid storage tank and part of proppant in the sand storage tank 9 to an electric sand mixing skid 6 for sand mixing to form sand mixing fluid;
s5: controlling the electric sand mixing pry 6 to discharge the rotating speed of the centrifugal pump and providing sand mixing liquid for the electric fracturing pump 4;
s6: controlling the rotating speed of a motor of the electric fracturing pump 4, and converging the sand mixing liquid into the fracturing pipe;
s7: and controlling the motor speed of the electric fracturing pump 4 based on the pump injection program table.
In this embodiment, before S1, the method further includes the following steps:
s00: the acid storage tank 12 supplies acid liquor to the electric liquid supply pry 8;
s01: controlling the opening and closing of an electric valve on a discharge manifold of the acid storage tank 12 to supply acid to the electric liquid supply pry 8;
s02: and controlling the opening and closing of an electric valve on the discharge manifold of the acid storage tank 12 based on a pump injection program table.
In this embodiment, the S2 specifically includes the following steps:
s21: controlling the suction centrifugal pump to suck clear water from the clear water storage tank and supply the clear water to the mixer and the mixing tank;
s22: controlling the rotating speed of the suction centrifugal pump based on the flow of the clean water;
s23: controlling the powder feeding screw, and injecting the medicinal powder into the mixer;
s24: controlling the rotational speed of the centrifugal mixing pump based on the mixer inlet pressure;
s25: controlling the discharge centrifugal pump to supply the prepared fracturing fluid to the mixing tank;
s26: and controlling the rotating speed of the discharge centrifugal pump based on the liquid level height of the mixing tank.
In this embodiment, the S4 specifically includes the following steps:
s41: controlling the electric sand mixing pry 6 to suck fracturing fluid from the mixed fluid storage tank, and accessing proppant from the sand storage tank 9;
s42: controlling the rotation speed of the sand conveying screw and conveying the propping agent to the electric sand mixing pry 6;
s43: and controlling the rotation speed of the conveying sand screw based on a pump injection program table.
In this embodiment, the S3 specifically includes the following steps:
s31: proppant is provided to the bag breaking opening of the sand storage tank 9 from the ton bag, the switch of the electric gate valve of the feed opening of the sand storage tank 9 is controlled, and different types of proppant are conveyed into corresponding bin positions;
s32: controlling the switch of the electric gate valve based on the material type of the feeding hole;
s33: controlling the switch of an electric gate valve at the discharge hole of the sand storage tank 9 to convey different proppants into the electric sand mixing hopper;
s34: and controlling the electric valve switch at the discharge hole of the sand storage tank 9 based on the pump injection program table.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a shale gas full-electric automation fracturing operation equipment which characterized in that includes: the device comprises a 35kV high-voltage room (1), a 10kV high-voltage room (2), a variable frequency power supply room (3), an electric fracturing pump (4), an instrument skid (5), an electric sand mixing skid (6), an electric mixing skid (7), an electric liquid supply skid (8), a sand storage tank (9), automatic sand conveying equipment (10), a liquid storage tank (11), an acid storage tank (12) and a high-low pressure manifold skid (13); wherein:
the 35kV high-voltage room (1) is connected with a 35kV high-voltage power supply from a power grid and converts the power supply into a 10kV power supply; the 10kV high-voltage room (2) is connected with the 35kV high-voltage room (1) through a high-voltage cable, a plurality of paths of 10kV power supplies are fed out, and meanwhile, the 10kV power supplies are converted into 400V; the 10kV high-voltage room (2) is respectively and electrically connected with the variable-frequency power supply room (3), the electric sand mixing sledge (6), the instrument sledge (5), the electric mixing sledge (7), the sand storage tank (9), the liquid storage tank (11), the acid storage tank (12) and the electric liquid supply sledge (8); the electric fracturing pump (4) is connected with a power supply from the variable frequency power supply room (3) and is used for converting electric energy into kinetic energy of fracturing fluid, and the fracturing fluid is injected into the underground through a manifold to fracture a stratum;
the liquid storage tank (11) is divided into a clear water liquid storage tank and a mixed liquid storage tank, a suction inlet of the electric liquid supply sledge (8) is connected with a water source, and a liquid inlet of the clear water liquid storage tank is connected with an output port pipeline of the electric liquid supply sledge (8); the clear water liquid storage tank is connected with an electric mixing sledge (7) through a pipeline; the electric mixing sledge (7) dissolves and mixes the powder, the additive and the clear water to prepare fracturing fluid, and the fracturing fluid is discharged out of the centrifugal pump and injected into the mixed fluid storage tank; the blending liquid storage tank is connected with an electric sand mixing skid (6) through a pipeline; the automatic sand conveying equipment (10) conveys the proppant to the sand storage tank (9); the electric sand mixing sledge (6) is connected into the mixed fracturing fluid in the mixed fluid storage tank and the propping agent in the sand storage tank (9) to mix the fracturing fluid and the propping agent; the electric sand mixing sledge (6) is connected with the high-low pressure manifold sledge (13) through a pipeline, and the electric fracturing pump (4) is connected with the high-low pressure manifold sledge (13) through a pipeline.
2. The shale gas all-electric automatic fracturing operation equipment according to claim 1, wherein the instrument sledge (5) is connected with and controls a 35kV high-voltage room (1), a 10kV high-voltage room (2), a variable frequency power supply room (3), an electric fracturing pump (4), an electric sand mixing sledge (6), an electric mixing sledge (7), an electric liquid supply sledge (8), a sand storage tank (9), an automatic sand conveying device (10), a liquid storage tank (11), an acid storage tank (12) and a high-low pressure manifold sledge (13) through a network bus.
3. The shale gas all-electric automatic fracturing operation equipment according to claim 1, wherein the 35kV high-voltage room (1) comprises a main transformer and a 35kV high-voltage switch cabinet, the 35kV high-voltage switch cabinet comprises a bus-bar lifting cabinet, the voltage of the primary side of the main transformer is 35kV, and the voltage of the secondary side of the main transformer is 10kV or 10.5 kV; the 10kV high-voltage room (2) comprises at least one high-voltage switch device, one or two 10 kV/0.4 kV transformers, a set of low-voltage switch device and at least one set of low-voltage connector; the variable frequency power supply room (3) comprises 1-2 phase-shifting transformers, 1-2 frequency converters and 1-2 sets of PLC control systems, wherein the primary side voltage of the phase-shifting transformers is 10kV, the secondary side voltage of the phase-shifting transformers is 1.8kV-2.1kV, the rectification topology of the frequency converters is over 12 pulses, and the PLC control systems monitor the current, the voltage and the torque output by the frequency converters.
4. The shale gas full-electric automatic fracturing operation equipment according to claim 1, wherein the electric fracturing pump (4) comprises a main motor, at least one auxiliary equipment motor, a sensor and at least one fracturing pump, and a rotating shaft of the main motor is connected with a crankshaft of the fracturing pump through a coupling or a gear; the rated voltage of the main motor is 3.3 kV or 6 kV; the auxiliary equipment motor is used for driving auxiliary equipment; the fracturing pump is a three-cylinder pump or a five-cylinder pump, and the rated water horsepower of the fracturing pump is 2500HP or above; the electric sand mixing sledge (6) comprises at least one sand mixing sledge motor, at least two sand mixing sledge centrifugal pumps and at least two sets of spiral conveying equipment, wherein the sand mixing sledge motor is used for driving the sand mixing sledge centrifugal pumps and the spiral conveying equipment, the sand mixing sledge centrifugal pumps are used for pressurizing fracturing base fluid and mixed liquid, and the spiral conveying equipment is used for conveying a propping agent into a mixing tank or a mixing pump; the electric mixing sledge (7) comprises at least two mixing sledge centrifugal pumps and mixing sledge motors, the electric mixing sledge (7) is connected with a PLC control system, the mixing sledge centrifugal pumps are connected with the mixing sledge motors, and the PLC control system remotely controls the liquid distribution displacement and concentration setting; the electric liquid supply sledge (8) comprises a liquid supply sledge centrifugal pump, a liquid supply sledge motor, an electromagnetic flow meter, a pressure sensor and a set of electric control cabinet, wherein the electric control cabinet is connected with a PLC control system, the pressure closed-loop control is realized by collecting the liquid pressure discharged by the liquid supply sledge centrifugal pump, and the electric liquid supply sledge (8) realizes remote control through the PLC control system.
5. The shale gas full-automatic fracturing operation equipment according to claim 1, wherein the sand storage tank (9) is used for storing fracturing propping agent and comprises at least one inlet and outlet, and electric valves for switching the inflow and outflow of the propping agent are arranged at the inlet and outlet; the automatic sand conveying equipment (10) is used for conveying a propping agent to the sand storage tank (9) and comprises at least one horizontal screw conveyor and at least one vertical screw conveyor, the automatic sand conveying equipment (10) is connected with an electric control cabinet, and the electric control cabinet is used for controlling the positive and negative rotation of the automatic sand conveying equipment (10); the liquid storage tank (11) is used for storing fracturing liquid and comprises at least two liquid inlets and outlets, the liquid inlets and outlets are provided with electric butterfly valves corresponding to the liquid inlets and outlets, the electric butterfly valves for storing the same liquid storage tank are operated in a linkage manner, and a liquid storage cavity is a flexible bag cavity formed by a metal folding frame and a flexible water bag or a cuboid liquid storage cavity formed by enclosing of metal plates; the acid storage tank (12) is used for storing acid liquor for fracturing and comprises an outlet electric ball valve, and the electric ball valve is used for receiving a remote control signal to be opened or closed.
6. A shale gas full-automatic fracturing operation method, which is characterized in that the shale gas full-automatic fracturing operation equipment according to any one of claims 1 to 5 is used, and comprises the following steps:
s1: the clear water liquid storage tank is supplied with water through the electric liquid supply pry (8);
s2: mixing the fracturing fluid, and storing the mixed fracturing fluid in a mixed fluid storage tank;
s3: conveying the proppant to a sand storage tank (9) through an automatic sand conveying device (10);
s4: conveying part of fracturing fluid in the mixed fluid storage tank and part of proppant in the sand storage tank (9) to an electric sand mixing skid (6) for sand mixing to form a sand mixing fluid;
s5: controlling the electric sand mixing pry (6) to discharge the rotating speed of the centrifugal pump and providing sand mixing liquid for the electric fracturing pump (4);
s6: controlling the rotating speed of a motor of the electric fracturing pump (4) and injecting the sand mixing liquid into the fracturing manifold;
s7: and controlling the rotating speed of the motor of the electric fracturing pump (4) based on the pump injection program table.
7. The shale gas full-automatic fracturing operation method according to claim 6, wherein the step of S1 is preceded by the steps of:
s00: the acid storage tank (12) supplies acid liquor to the electric liquid supply pry (8);
s01: controlling the acid storage tank (12) to discharge the switch of an electric valve on the manifold, and supplying acid to the electric liquid supply pry (8);
s02: and controlling the opening and closing of an electric valve on a discharge manifold of the acid storage tank (12) based on a pump injection program table.
8. The shale gas full-automatic fracturing operation method according to claim 6, wherein the S2 specifically comprises the following steps:
s21: controlling an electric mixing sledge (7) to suck a centrifugal pump, sucking clear water from a clear water storage tank, and supplying liquid to a mixer and a mixing tank;
s22: controlling the rotating speed of the suction centrifugal pump based on the flow of the clean water;
s23: controlling a powder feeding screw based on the set concentration of the mixed solution, and injecting the medicinal powder into the mixer;
s24: controlling the rotational speed of the centrifugal mixing pump based on the mixer inlet pressure;
s25: controlling and discharging the centrifugal pump, and supplying the prepared fracturing fluid to the liquid storage tank;
s26: and controlling the rotating speed of the discharge centrifugal pump based on the liquid level height of the mixing tank.
9. The shale gas full-automatic fracturing operation method according to claim 6, wherein the S4 specifically comprises the following steps:
s41: controlling the electric sand mixing pry (6) to suck fracturing fluid from the mixed fluid storage tank, and accessing proppant from the sand storage tank (9);
s42: controlling the rotation speed of the sand conveying screw, and conveying a propping agent to the electric sand mixing pry (6);
s43: and controlling the rotation speed of the conveying sand screw based on a pump injection program table.
10. The shale gas full-automatic fracturing operation method according to claim 6, wherein the S3 specifically comprises the following steps:
s31: proppant is provided to a bag breaking opening of the automatic sand conveying equipment (10) from a ton bag, the opening and closing of an electric gate valve of a feeding opening of the sand storage tank (9) are controlled, and different types of proppant are conveyed into corresponding bin positions;
s32: controlling the switch of the electric gate valve based on the material type of the feeding hole;
s33: controlling the switch of an electric gate valve at the discharge hole of the sand storage tank (9) to convey different proppants into the electric sand mixing hopper;
s34: and controlling the electric valve switch at the discharge hole of the sand storage tank (9) based on the pump injection program table.
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| CN113969774A (en) * | 2021-09-28 | 2022-01-25 | 四川宏华电气有限责任公司 | Coal bed gas fracturing equipment and operation method |
| CN114377605A (en) * | 2022-01-19 | 2022-04-22 | 中石化四机石油机械有限公司 | An all-electric sand mixing system with integrated liquid supply function |
| CN115411628A (en) * | 2022-08-18 | 2022-11-29 | 烟台杰瑞石油装备技术有限公司 | Integrated step-down power supply equipment and well site power supply system |
| CN116617890A (en) * | 2022-02-10 | 2023-08-22 | 中国石油天然气集团有限公司 | A modular skid-mounted electric drive sand mixing equipment |
| CN120211716A (en) * | 2025-03-10 | 2025-06-27 | 北京恒京盛石油装备有限公司 | A fracturing equipment |
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