CN108729896B - Hot dry rock robot explosion hydraulic composite fracturing drilling and completion system - Google Patents
Hot dry rock robot explosion hydraulic composite fracturing drilling and completion system Download PDFInfo
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- CN108729896B CN108729896B CN201810488532.2A CN201810488532A CN108729896B CN 108729896 B CN108729896 B CN 108729896B CN 201810488532 A CN201810488532 A CN 201810488532A CN 108729896 B CN108729896 B CN 108729896B
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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
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2405—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection in association with fracturing or crevice forming processes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- 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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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Abstract
A hot dry rock robot explosion hydraulic composite fracturing drilling and completion system comprises a ground control system, a robot, a drilling execution system, an explosion fracturing execution system, a hydraulic fracturing execution system, a directional execution system and a reentry execution system; the ground port control system comprises a data processing center, a ground data acquisition sensor, a drilling and completion controller, a ground signal transceiving device, a blowout preventer, a coiled tubing wellhead device, a coiled tubing operation vehicle, input equipment and a storage unit; the robot comprises a well bottom data acquisition sensor, a CPU unit, a drilling control module, a well bottom signal transceiver, a reentry tool control module, an oriented tool control module, an explosion fracturing control module and a hydraulic fracturing control module; the robot technology is adopted, intelligent closed-loop drilling is realized, the operation cost is effectively reduced, the combustion explosion and hydraulic composite fracturing technology is adopted, the hot dry rock fracture network can be obviously optimized, and the risk of heat transfer short circuit is reduced.
Description
Technical Field
The invention belongs to the technical field of drilling and completion, and particularly relates to a hot dry rock robot explosion hydraulic composite fracturing drilling and completion system.
Background
According to the investigation and evaluation results of 2015 by the ministry of China's native resources and the Central geological survey, the amount of hot dry rock resources buried deep at 3000-10000 m in the nationwide land is equivalent to 856 trillion tons of standard coal, the amount of recoverable resources reaches 17 trillion tons of standard coal, and approximately accounts for 1/6 of the total amount of the hot dry rock resources in the world.
The dry hot rock is a compact impermeable high-temperature rock mass without water or steam, can be widely used for power generation, heating, enhanced oil exploitation and the like, hardly generates pollutants such as nitrogen, sulfur oxides and the like in the development process, is not limited by seasons, climates and day and night, and is an internationally recognized high-efficiency low-carbon clean energy. Since the 70 s of the last century, research on development and utilization of hot dry rock has been conducted in many countries around the world. At present, a plurality of research bases for development and utilization tests are established in countries such as the United states, the United kingdom, Australia and the like. The research work of geothermal resource development starts from 1987 in China, in 2013, the hot dry rock with the temperature as high as 153 ℃ is successfully drilled in 2230 m depth of the Qinghai-harmonized basin in China for the first time, in 2017, the hot dry rock with the temperature as high as 236 ℃ is drilled in 3705 m depth of the basin, and the development and utilization of geothermal resources in China are still in the primary stage on the whole. Although the exploitation of the hot dry rock falls behind abroad in China, the exploitation of the hot dry rock does not enter a large-scale exploitation stage at home and abroad as a whole, and further research shows that the reason for limiting the large-scale exploitation of the hot dry rock resources is mainly as follows:
hot dry rock drilling is costly. In the early investment of the dry hot rock exploitation, compared with the same well depth of the conventional oil gas, the drilling cost of the dry hot rock is 2-5 times of that of the conventional oil gas, and the drilling investment accounts for more than 80% of the early investment of the dry hot rock, which is one of the important reasons that the dry hot rock exploitation is difficult to popularize on a large scale at present.
The hydraulic fracturing effect of the dry hot rock is poor. In order to improve the heat exchange efficiency of the hot dry rock, a hydraulic fracturing technology is conventionally adopted to reform a hot dry rock reservoir, the cracks generated by hydraulic fracturing are few, the heat exchange effect is poor, the phenomenon of heat transfer short circuit is easy to occur, namely the temperature difference between an inlet and an inlet of a heat exchange medium is very small, and the heat energy cannot be utilized. The occurrence of the phenomenon of 'heat transfer short circuit' indicates that the well hole has no available value, and the phenomenon greatly shortens the exploitation period of the hot dry rock, so that the phenomenon of the hot dry rock troubles the sustainable exploitation of the hot dry rock.
The hot dry rock has poor comprehensive benefits. The discharge capacity of a conventional oil gas exploitation wellhead determines the benefit of oil gas exploitation, the benefit of the dry hot rock is related to the heat value exchanged in unit time, the benefit generated by heat value exchange of the dry hot rock is far less than that generated by conventional oil gas resource exploitation under the common condition, and the early investment of the dry hot rock is far greater than that of the conventional oil gas resource, so that the comprehensive benefit of the dry hot rock exploitation is generally low.
The prior art mainly has the following defects:
(1) the mixing proportion and the quantity of the fuel, the oxidant and the water are difficult to control, and even the combustion condition can not be achieved;
(2) the fuel, the oxidant and the water are mixed in proportion before being extracted, and the mixture can be combusted on the ground and in the process of putting the mixture into the ground, so that the potential safety hazard is serious;
(3) the gas is combusted in the existing cracks, the length of the original cracks is extended, the number of the cracks is limited, and the phenomenon of heat transfer short circuit is easy to occur;
(4) the existing robot adopts the liquid explosive which is rapidly solidified, the explosive is difficult to transport, and the potential safety hazard is very large in the transport process;
(5) and the drilling and completion operation of the multilateral well bore cannot be realized.
The invention provides a dry hot rock mining technology with low drilling cost, good storage and transformation effects and high comprehensive benefits, which has important and practical significance for improving the energy structure of China, preventing and controlling atmospheric pollution and promoting the scientific development of the ecological environment of the economic society.
Disclosure of Invention
The invention aims to provide a hot dry rock robot explosion hydraulic composite fracturing drilling and completion system which can obviously optimize a hot dry rock fracture network and reduce the risk of heat transfer short circuit aiming at the problems.
A hot dry rock robot explosion hydraulic composite fracturing drilling and completion system comprises a ground control system, a robot, a drilling execution system, an explosion fracturing execution system, a hydraulic fracturing execution system, a directional execution system and a reentry execution system; the robot is respectively connected with the drilling execution system, the explosion fracturing execution system, the hydraulic fracturing execution system, the directional execution system and the reentry execution system, and is used for data acquisition and control of drilling, explosion fracturing and hydraulic fracturing.
The ground port control system comprises a data processing center, a ground data acquisition sensor, a drilling and completion controller, a ground signal transceiving device, a blowout preventer, a coiled tubing wellhead device, a coiled tubing operation vehicle, input equipment and a storage unit; the ground data acquisition sensor, the drilling and completion controller, the ground signal transceiver, the input equipment and the storage unit are respectively connected with the data processing center; the input device is used for inputting a detonation signal, data of an explosion fracturing position and data of a hydraulic fracturing position.
The drilling execution system is used for drilling a double horizontal well and provides a foundation for a hot dry rock heat transfer fracture network; the explosive fracturing execution system is used for carrying out explosive fracturing on the double horizontal wells to form a multi-fracture heat transfer fracture network; the hydraulic fracturing execution system is used for extending a heat transfer fracture network formed by explosive fracturing to form hydraulic fracturing fractures so as to communicate a double-horizontal well.
The drilling execution system is composed of a coiled tubing, a coiled tubing adapter, a coiled tubing safety joint, a one-way valve, a directional tool, a power drilling tool, a reentry tool and a drill bit which are connected in sequence, and the robot is arranged between the one-way valve and the directional tool.
The robot controls a reentry tool to put the drilling pipe string into the entrance position of the cluster well bore, the drilling pipe string performs drilling operation on the hot dry rock double horizontal wells, and the coiled tubing operation vehicle is lifted out of the drilling pipe string after the drilling operation is completed; the robot controls a re-entering tool to put the explosion fracturing well completion pipe string assembled on the ground into the position of the entrance of the cluster well, drags the explosion fracturing well completion pipe string and carries out explosion fracturing on a plurality of fracturing points in sequence to complete explosion fracturing operation; the hydraulic fracturing completion pipe string extends a heat transfer fracture network formed by explosive fracturing to form hydraulic fracturing fractures, so that a double horizontal well is communicated.
The explosion fracturing execution system consists of a continuous oil pipe, a continuous oil pipe conversion joint, a continuous oil pipe safety joint, a one-way valve, a hydraulic anchor, a temporary plugging device A, a detonating device, an explosive short section, a temporary plugging device B, a reentrant tool and a guide shoe which are connected in sequence; the robot is arranged between the one-way valve and the hydraulic anchor.
The hydraulic fracturing execution system consists of a continuous oil pipe, a continuous oil pipe conversion joint, a continuous oil pipe safety joint, a hydraulic anchor, a packer A, a jet nipple, a packer B, a re-entry tool and a guide shoe which are connected in sequence; the robot is arranged between the coiled tubing safety joint and the hydraulic anchor.
Furthermore, the ground data acquisition sensor comprises a displacement sensor, a pumping pressure sensor, a drilling speed sensor and a well depth sensor, and the robot analyzes the optimal feeding speed and traction according to data measured by the ground data acquisition sensor.
Furthermore, the robot comprises a well bottom data acquisition sensor, a CPU unit, a drilling control module, a well bottom signal transceiver, a reentry tool control module, an oriented tool control module, an explosion fracturing control module and a hydraulic fracturing control module; the reentry tool control module, the drilling control module, the directional tool control module, the explosion fracturing control module and the hydraulic fracturing control module are respectively connected with the output end of the CPU unit; the bottom hole data acquisition sensor and the bottom hole signal transceiver are respectively connected with the CPU unit; the bottom hole signal transceiver is connected with the ground signal transceiver through a network.
Further, the drilling and completion controller comprises a displacement controller, a pumping pressure controller and a coiled tubing reel rotating speed controller.
Furthermore, the well bottom data acquisition sensor comprises a drilling rate sensor, a drilling pressure sensor, a torque sensor, a vibration sensor, a distance sensor, a displacement sensor, a hydraulic sensor, a shaft identification sensor, an azimuth sensor and a well bottom signal transceiver; the azimuth sensor is used for collecting well deviation data; the shaft identification sensor is used for scanning shaft shape parameters in real time, identifying the shape and the orientation parameters of the cluster shaft through the CPU unit, and controlling the reentrant tool to enter the corresponding cluster shaft by the central processing unit of the robot according to the orientation parameters of the cluster shaft.
Furthermore, the explosive nipple is a modular explosive nipple and used for adjusting the amount of ground explosives.
Further, the detonating device is detonated by a robot through a detonation signal input by an input device of the ground control system.
The invention has the beneficial effects that: the problems of high drilling cost, poor fracturing effect and poor comprehensive exploitation benefit of the existing dry and hot rock are solved, the robot technology is adopted in the drilling process, and the stability and safety are enhanced by adopting explosive short section conveying; the drilling and completion operation of the multilateral well bore is realized; the intelligent closed-loop drilling is realized, the drilling operation cost of the dry hot rock can be effectively reduced, the explosion and hydraulic composite fracturing technology is adopted in the well completion process, the dry hot rock fracture network can be obviously optimized, the fracture length is extended, the number of fractures is increased, and the risk of heat transfer short circuit is reduced.
Drawings
FIG. 1 is a schematic diagram of a well drilling and completion system configuration of the present invention;
FIG. 2 is an enlarged partial schematic view of the drill string of FIG. 1;
FIG. 3 is a schematic illustration of an explosive fracturing configuration of the present invention;
FIG. 4 is an enlarged schematic view of a portion of the string of detonation fractured completion tubulars of FIG. 3;
FIG. 5 is a schematic illustration of a hydraulic fracturing configuration of the present invention;
FIG. 6 is an enlarged partial schematic view of the hydraulic fracturing completion string of FIG. 5;
FIG. 7 is a system diagram of the ground control system and robot of the present invention;
FIG. 8 is a flow chart of the operation of the present invention;
FIG. 9 is a flow chart of the cluster well reentry control of the present invention;
FIG. 10 is a drilling control flow diagram of the present invention;
FIG. 11 is a flow chart of the present invention for orienting a dual horizontal well;
FIG. 12 is a flow chart for explosive fracturing control of the present invention;
fig. 13 is a hydraulic fracturing control flow diagram of the present invention.
The reference numbers in the figures denote: 1-a formation; 2-coiled tubing wellhead assembly; 3-a blowout preventer; 4-ground signal receiving/transmitting device; 5-a signal line; 6-coiled tubing reel; 7-drum speed controller; 8-a data processing center; 9-coiled tubing operation vehicle; 10-a slurry pump; 11-mud pump displacement/pump pressure controller; 12-a main wellbore; 13-coiled tubing; 14-coiled tubing crossover sub; 15-coiled tubing safety joint; 16-a one-way valve; 17-a robot; 18-an orientation tool; 19-a power drill; 20-reentry means; 21-a drill bit; 22-a hydraulic anchor; 23-temporary plugging device A; 24-a detonating device; 25-explosive nipple; 26-temporary blocking device B; 27-guide shoe; 28-packer A; 29-a nozzle; 30-a packer B; 31-a bi-level well; 32-a string of drilling tubulars; 33-explosive fracturing completion string; 34-hydraulic fracturing completion pipe string; 35-explosive fracturing of fractures; 36-hydraulic fracturing of fractures; 37-ground control system.
Detailed Description
The embodiment provides a hot dry rock robot explosion hydraulic composite fracturing drilling and completion system, which comprises a ground control system, a robot 17, a drilling execution system, an explosion fracturing execution system, a hydraulic fracturing execution system, a directional execution system and a reentry execution system; the robot 17 is respectively connected with a drilling execution system, an explosion fracturing execution system, a hydraulic fracturing execution system, a directional execution system and a reentry execution system, and the robot is used for data acquisition and control of drilling, explosion fracturing and hydraulic fracturing.
The ground port control system comprises a data processing center, a ground data acquisition sensor, a drilling and completion controller, a ground signal transceiver 4, a blowout preventer 3, a coiled tubing wellhead device 2, a coiled tubing operation vehicle 9, input equipment and a storage unit; the ground data acquisition sensor, the drilling and completion controller, the ground signal transceiver, the input equipment and the storage unit are respectively connected with the data processing center.
As shown in fig. 7, the robot 17 includes a downhole data acquisition sensor, a CPU unit, a drilling control module, a downhole signal transceiver, a reentry tool control module, an oriented tool control module, an explosive fracturing control module, and a hydraulic fracturing control module; the reentry tool control module, the drilling control module, the directional tool control module, the explosion fracturing control module and the hydraulic fracturing control module are respectively connected with the output end of the CPU unit; the bottom hole data acquisition sensor and the bottom hole signal transceiver are respectively connected with the CPU unit; the bottom hole signal transceiver is connected with the ground signal transceiver 4 through a network.
The drilling execution system is used for drilling a dual-horizontal well 31 and provides a foundation for a hot dry rock heat transfer fracture network; the explosive fracturing execution system is used for carrying out explosive fracturing on the double horizontal wells to form a multi-fracture heat transfer fracture network; the hydraulic fracture execution system is used for extending a heat transfer fracture network formed by explosive fracturing to form hydraulic fracture fractures 36, thereby communicating with a bi-level well.
As shown in fig. 1 and 2, the drilling execution system is composed of a coiled tubing 13, a coiled tubing crossover sub 14, a coiled tubing safety sub 15, a check valve 16, a directional tool 18, a power drill 19, a reentry tool 20 and a drill bit 21 which are connected in sequence, and the robot 17 is arranged between the check valve 16 and the directional tool 18.
As shown in fig. 3 and 4, the explosion fracturing execution system consists of a coiled tubing 13, a coiled tubing crossover sub 14, a coiled tubing safety joint 15, a one-way valve 16, a hydraulic anchor 22, a temporary plugging device a23, an initiating device 24, an explosive nipple 25, a temporary plugging device B26, a reentry tool 20 and a guide shoe 27 which are connected in sequence; the robot 17 is arranged between the one-way valve 16 and the hydraulic anchor 22.
As shown in fig. 5 and 6, the hydraulic fracturing execution system consists of a coiled tubing 13, a coiled tubing crossover sub 14, a coiled tubing safety sub 15, a hydraulic anchor 22, a packer a28, a jet nipple 29, a packer B30, a re-entry tool 20 and a guide shoe 27 which are connected in sequence; the robot 17 is arranged between the coiled tubing safety joint 15 and the hydraulic anchor 22.
A hot dry rock robot explosion hydraulic composite fracturing drilling and completion system comprises the following working processes: s1: setting a borehole trajectory of a hot dry rock cluster double horizontal well, a borehole interval of the hot dry rock cluster double horizontal well, a borehole structure parameter of the hot dry rock cluster double horizontal well, a drilling string 32 parameter, an explosive fracturing well completion string 33 parameter and a hydraulic fracturing well completion string 34 parameter according to the burial depth of the hot dry rock, the thickness of a reservoir, the dip angle of a stratum, a heat energy parameter and a heat transfer parameter; setting hydraulic parameters and mechanical parameters according to the physical property parameters of the rock stratum and the drillability of the rock; obtaining an expansion rule of the explosive fracturing cracks 35 and the hydraulic fracturing cracks 36 according to the lithology of the dry hot rock, and setting explosive intervals, explosive quantity, hydraulic fracturing discharge capacity and pressure parameters; s2: well assemble the well drilling pipe string 32 on the ground, the robot 17 controls the reentry tool 20 to put the well drilling pipe string 32 into the entrance of the cluster well, the well drilling pipe string 32 carries on the drilling operation to the hot dry rock double horizontal well 31, the coiled tubing operation car is lifted out of the well drilling pipe string 32 after finishing; s3: the robot 17 controls the re-entering tool 20 to put the ground assembled explosive fracturing well completion pipe string 33 into the entrance of the cluster well, the explosive fracturing well completion pipe string 33 is dragged to the deep part of the well, the hydraulic anchor 22 and the temporary plugging device A23 are set, the detonating device 24 conducts detonating operation on the explosive nipple 25, the explosive nipple 25 completes single-point explosive fracturing on the hot dry rock, the ground entrance control system drags the explosive fracturing well completion pipe string 33 and conducts explosive fracturing on a plurality of fracturing points in sequence, and explosive fracturing operation is completed; s4: the robot 17 controls the re-entering tool 20 to put the hydraulic fracturing well completion pipe string 34 assembled on the ground into the entrance of the cluster well, the robot 17 drags the hydraulic fracturing well completion pipe string 34 to the deep part of the set well, the hydraulic anchor 22 is set, the packer 30 is set, the ground pumps fracturing fluid, the fracturing fluid prolongs the length of the explosive fracturing crack 35 under high pressure until the double horizontal wells 31 are communicated through the crack, and the continuous oil pipe operation vehicle 9 plays the hydraulic fracturing well completion pipe string to complete hydraulic fracturing operation.
As shown in figure 9, the working principle of a branch well re-entry tool 20 of a hot dry rock robot explosion hydraulic composite fracturing drilling and completion method is that when a robot 17 is lowered to 5-10 meters away from a cluster well shaft, a cluster well shaft number is input through an input device in a ground control system, a data processing center codes the cluster well shaft number, a ground signal transceiver transmits a code to the underground, a well bottom signal transceiver of the robot 17 receives a coded signal, a central processing unit decodes the coded signal, a well shaft identification sensor simultaneously detects the shape of the well shaft in real time, detection data is judged by the central processing unit, if the detected data is not a branch well shaft, the detection is continued, if the detected well shaft is a designed well shaft, if the well shaft is not a designed branch well shaft, a control signal is transmitted to a re-entry tool controller according to the detected position of the branch well shaft, the reentry tool controller controls reentry tool 20 to direct either the drill string 32, the detonation fracturing completion string 33, or the hydraulic fracturing completion string 34 into the respective wellbore.
As shown in figures 1 and 10, the working principle of the drilling process of the hot dry rock robot explosion hydraulic composite fracturing drilling and completion system is that a drilling pipe string 32 is assembled on the ground, the drilling pipe string 32 is put in, a re-entering tool 20 normally works in the putting process, when the drilling pipe string 32 is put in 5-10 meters away from the well bottom, a drilling mode is started, input equipment in a ground control system inputs the drilling pressure and the drilling speed, a data processing center encodes the drilling speed and the drilling pressure and transmits data to the well bottom through a ground signal transceiver 4, the well bottom signal transceiver receives a ground signal, the central processing unit decodes the ground signal and transmits the control signal to a proportional control valve controller and a throttle valve controller of a drilling execution system, the proportional control valve controller and the throttle valve controller respectively control the feeding speed and the feeding drilling pressure, and the drilling speed sensor, the drilling speed sensor and the throttle valve controller of a robot 17 are used for drilling simultaneously, The drilling rate, the drilling pressure, the torque, the vibration, the displacement and the hydraulic parameters are detected by the drilling pressure sensor, the torque sensor, the vibration sensor, the displacement sensor and the hydraulic sensor in real time, the central processing unit analyzes and judges whether the drilling process is optimal or not through big data, if not, the robot 17 inputs the optimal control signal into the drilling execution controller again and performs corresponding feeding speed and feeding drilling pressure adjustment, if the drilling process is optimal, the bottom hole control system sends the moving speed of the drilling pipe string 32 to the ground through the bottom hole signal transceiver, the ground signal transceiver 4 of the ground control system receives the signal and transmits the signal to the data processing center, the data processing center converts the moving speed of the drilling pipe string into the rotating speed of the coiled tubing, and transmits the rotation speed signal to a reel rotation speed controller, and the reel rotation speed controller adjusts the rotation speed of the coiled tubing reel 6.
As shown in fig. 11, while controlling the feeding speed and the feeding weight of the drilling well, the ground control system inputs the distance of the double horizontal wells through the input device, the data processing center encodes the distance data, the ground signal transceiver 4 transmits the signal to the bottom of the well, the bottom signal transceiver receives the signal, the central processor decodes the signal, the central processor compares the distance detected by the distance sensor with the distance transmitted on the ground, the central processor calculates the adjustment angle of the directional tool according to the deviation and the direction detected by the deviation/direction sensor, the central processor combines the comparison result of the central processor and the comparison result, the robot 17 transmits the adjustment angle to the directional tool controller, the directional tool controller controls the directional angle of the directional tool 18, the distance sensor monitors in real time during the drilling process and feeds back the data to the directional tool controller, the orientation tool controller controls the orientation angle of the orientation tool in real time.
As shown in fig. 3 and 12, an explosive fracturing working principle of a hot dry rock robot explosive hydraulic composite fracturing drilling and completion system is that an explosive fracturing completion pipe string 33 is assembled on the ground, the explosive fracturing completion pipe string 33 is put in, a reentry tool 20 works in the putting process, an input device of a ground control system inputs explosive fracturing position data, a data processing center encodes the position data, a ground signal transceiver transmits a position signal, a bottom signal transceiver of a robot 17 receives the position signal and transmits the position signal to a central processing unit for decoding, the ground control system pulls the explosive fracturing completion pipe string 33 and a well depth sensor of the ground control system to detect the well depth data in real time, if the robot 17 does not reach a designed well depth, the pulling is continued, if the robot 17 reaches the designed well depth, the robot 17 transmits an explosive fracturing control signal to an explosive fracturing execution system, the hydraulic anchor 22, the setting controller, the temporary plugging tool controller and the detonation controller sequentially work and respectively control the hydraulic anchor, the temporary plugging device A, the temporary plugging device B and the detonation device 24, the detonation device 24 detonates the explosive nipple 25 to complete single-point explosive fracturing, and the robot 17 drags the explosive fracturing well completion pipe string 33 according to design data to complete the explosive fracturing operation of the dry hot rock micro-well according to the flow.
As shown in fig. 5 and fig. 13, a hydraulic fracturing working principle of a hot dry rock robot explosion hydraulic composite fracturing drilling and completion system, a hydraulic fracturing completion pipe string 34 is assembled on the ground, the hydraulic fracturing completion pipe string 34 is put in, a reentry tool 20 works in the putting process, input equipment of a ground control system inputs hydraulic fracturing position data, a data processing center encodes the position data, a ground signal transceiver transmits a position signal, a bottom signal transceiver of the bottom control system receives the position signal and transmits the position signal to a central processing unit for decoding, the robot pulls the hydraulic fracturing completion pipe string 34 and a well depth sensor of the ground control system to detect the well depth data in real time, if the robot does not reach the designed well depth, the robot pulls continuously, if the robot reaches the designed well depth and pumps, the robot 17 transmits a hydraulic fracturing control signal to the hydraulic fracturing execution system, the hydraulic anchor setting controller and the packer setting controller of the hydraulic fracturing execution system work in sequence and respectively control the hydraulic anchor 22, the packer A28 and the packer B30, and the slurry pump increases the pump pressure to perform fracturing so as to complete single-point hydraulic fracturing operation.
The invention is not only suitable for the development of dry and hot rocks, but also suitable for the development of unconventional oil gas (natural gas hydrate, coal bed gas, dense oil gas and shale gas) and conventional oil gas resources.
Claims (7)
1. The hot dry rock robot explosion hydraulic composite fracturing drilling and completion system is characterized by comprising a ground control system, a robot (17), a drilling execution system, an explosion fracturing execution system, a hydraulic fracturing execution system, a directional execution system and a reentry execution system; the robot (17) is respectively connected with the drilling execution system, the explosion fracturing execution system, the hydraulic fracturing execution system, the directional execution system and the reentry execution system, and is used for data acquisition and control of drilling, explosion fracturing and hydraulic fracturing;
the ground control system comprises a data processing center, a ground data acquisition sensor, a drilling and completion controller, a ground signal transceiver (4), a blowout preventer (3), a coiled tubing wellhead device (2), a coiled tubing operation vehicle (9), input equipment and a storage unit; the ground data acquisition sensor, the drilling and completion controller, the ground signal transceiver (4), the input equipment and the storage unit are respectively connected with the data processing center; the input equipment is used for inputting a detonation signal, data of an explosion fracturing position and data of a hydraulic fracturing position;
the drilling execution system is used for drilling a double horizontal well (31) and provides a foundation for a hot dry rock heat transfer fracture network; the explosive fracturing execution system is used for carrying out explosive fracturing on the double horizontal well (31) to form a multi-fracture heat transfer fracture network; the hydraulic fracturing execution system is used for extending the heat transfer fracture network formed by explosive fracturing to form hydraulic fracturing fractures (36) so as to communicate the double horizontal wells;
the drilling execution system consists of a coiled tubing (13), a coiled tubing adapter (14), a coiled tubing safety joint (15), a one-way valve (16), a directional tool (18), a power drilling tool (19), a reentry tool (20) and a drill bit (21) which are connected in sequence, and the robot (17) is arranged between the one-way valve (16) and the directional tool (18);
the explosion fracturing execution system consists of a continuous oil pipe (13), a continuous oil pipe conversion joint (14), a continuous oil pipe safety joint (15), a one-way valve (16), a hydraulic anchor (22), a temporary plugging device A (23), an initiating device (24), an explosive short joint (25), a temporary plugging device B (26), a re-entry tool (20) and a guide shoe (27) which are connected in sequence; the robot (17) is arranged between the one-way valve (16) and the hydraulic anchor (22);
the hydraulic fracturing execution system consists of a continuous oil pipe (13), a continuous oil pipe conversion joint (14), a continuous oil pipe safety joint (15), a hydraulic anchor (22), a packer A (28), a nozzle (29), a packer B (30), a re-entry tool (20) and a guide shoe (27) which are connected in sequence; the robot (17) is arranged between the coiled tubing safety joint (15) and the hydraulic anchor (22);
the robot (17) controls a re-entering tool (20) to put the drilling pipe string (32) into the entrance of the cluster well, the drilling pipe string (32) performs drilling operation on the hot dry rock double horizontal wells (31), and the coiled tubing operation vehicle (9) is lifted out of the drilling pipe string after the drilling operation is completed; the robot (17) controls a re-entering tool (20) to put the explosion fracturing well completion pipe string (33) assembled on the ground into the position of the entrance of the cluster well hole, and the robot (17) drags the explosion fracturing well completion pipe string (33) and carries out explosion fracturing on a plurality of fracturing points in sequence to complete the explosion fracturing operation; the hydraulic fracture completion string (34) extends the network of heat transfer fractures formed by the explosive fractures to form hydraulic fracture fractures (36) that communicate with the bi-level well (31).
2. The hot dry rock robot explosion hydraulic composite fracturing drilling and completion system of claim 1, wherein the robot (17) comprises a downhole data acquisition sensor, a CPU unit, a drilling control module, a downhole signal transceiver, a reentry tool control module, a directional tool control module, an explosion fracturing control module, and a hydraulic fracturing control module; the reentry tool control module, the drilling control module, the directional tool control module, the explosion fracturing control module and the hydraulic fracturing control module are respectively connected with the output end of the CPU unit; the bottom hole data acquisition sensor and the bottom hole signal transceiver are respectively connected with the CPU unit; the well bottom signal transceiver is connected with the ground signal transceiver (4) through a network.
3. The hot dry rock robot explosion hydraulic composite fracturing drilling and completion system of claim 1, wherein the surface data acquisition sensor comprises a displacement sensor, a pumping pressure sensor, a drilling speed sensor and a well depth sensor, and the robot (17) analyzes the optimal feeding speed and the optimal traction according to the data measured by the surface data acquisition sensor.
4. The hot dry rock robot explosion hydraulic compound fracturing drilling and completion system of claim 1, wherein the drilling and completion controller comprises a displacement controller, a pump pressure controller, and a coiled tubing reel rotation speed controller.
5. The hot dry rock robot explosion hydraulic complex fracturing drilling and completion system of claim 2, wherein the downhole data acquisition sensor comprises a drilling rate sensor, a drilling pressure sensor, a torque sensor, a vibration sensor, a distance sensor, a displacement sensor, a hydraulic pressure sensor, a shaft identification sensor, an orientation sensor, a downhole signal transceiver; the azimuth sensor is used for collecting well deviation data; the shaft identification sensor is used for scanning shaft shape parameters in real time, identifying the shape and the orientation parameters of the cluster shaft through the CPU unit, and controlling the reentrant tool (20) to enter the corresponding cluster shaft by the CPU of the robot (17) according to the orientation parameters of the cluster shaft.
6. The hot dry rock robot explosion hydraulic composite fracturing drilling and completion system according to claim 1, wherein the explosive sub (25) is a modular explosive sub (25) used for adjusting the amount of ground explosive.
7. The hot dry rock robot explosion hydraulic compound fracturing drilling and completion system of claim 1, wherein the initiation device (24) is initiated by the robot (17) by an initiation signal input by an input device of a ground control system.
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| PCT/CN2018/103504 WO2019223164A1 (en) | 2018-05-21 | 2018-08-31 | Hot-dry rock robot explosion-hydraulic composite fracturing well drilling and completion system and method |
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| CN109519164A (en) * | 2018-12-05 | 2019-03-26 | 西南石油大学 | A kind of coiled tubing drilling robot control system of controllable rate of penetration and bit pressure |
| CN110541696A (en) * | 2019-07-15 | 2019-12-06 | 河南理工大学 | carbon dioxide blasting-hydraulic fracturing reconstruction yield increasing method for oil and gas well |
| CN110284866B (en) * | 2019-07-23 | 2024-02-09 | 中国矿业大学(北京) | Shale fracturing device and method |
| CN112855110A (en) * | 2021-01-21 | 2021-05-28 | 石家庄铁道大学 | Permeation increasing method for sandstone-type uranium ore layer |
| CN113431495B (en) * | 2021-08-02 | 2024-05-07 | 任丘市华北油田诚信工业有限公司 | Ground gas control method integrating low-ventilation and fusion technologies |
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