CN106351581A - Ultra-carbon connecting tube jet drilling horizontal well system and jet drilling method - Google Patents
Ultra-carbon connecting tube jet drilling horizontal well system and jet drilling method Download PDFInfo
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- CN106351581A CN106351581A CN201610772009.3A CN201610772009A CN106351581A CN 106351581 A CN106351581 A CN 106351581A CN 201610772009 A CN201610772009 A CN 201610772009A CN 106351581 A CN106351581 A CN 106351581A
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- carbon dioxide
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B7/046—Directional drilling horizontal drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/07—Arrangements for treating drilling fluids outside the borehole for treating dust-laden gaseous fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
- E21B21/085—Underbalanced techniques, i.e. where borehole fluid pressure is below formation pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Abstract
The invention discloses an ultra-carbon connecting tube jet drilling horizontal well system and a jet drilling method. The ultra-carbon connecting tube jet drilling horizontal well system comprises an ultra-carbon closed separation circulation unit and an ultra-carbon connecting tube jet drilling unit. Waste generated in the jet drilling process is jetted, guided and recovered by the aid of supercritical carbon dioxide, so that supercritical carbon dioxide is separated, serves as drilling fluid and is circulated into the ultra-carbon connecting tube jet drilling unit again, and jet drilling is performed. The system solves the problems of small borehole diameter, complicated horizontal section and borehole problems, more waste and large pollution of a current coiled tubing jet drilling radial horizontal well taking clear water, water base, oil base, foam and the like as the drilling fluid, the diameter of a well hole and the length of the horizontal well section can be greatly increased, drilling speed, oil-gas yield and environmental protection level are improved, and well site facilities and drilling and production costs are reduced.
Description
Technical field
The present invention relates to Oil ＆ Gas Drilling Technology field is and in particular to a kind of super carbon connecting leg sprays horizontal well drilling system and spray brill side
Method.
Background technology
Horizontal well is that maximum hole angle is maintained at 90 degree about, and maintains the net horizontal section of certain length in target zone
Exceptional well.The outstanding feature of horizontal well is that well passes through the length of oil-gas Layer long, increased the contact surface of well and oil-gas Layer
Long-pending, so that Oil/gas Well has the advantages that well yield height, speed of production are fast.But existing coiled tubing radially horizontal well drilling well
Technology is primarily present problems with:
1st, fluid limits and borehole problems: existing radially horizontal well jet drilling technology commonly uses the drilling well stream such as clear water, acid solution
Body, exist water-sensitive, readily soluble, easily collapse, Yi Ka, leakiness, easily spray, easily stifled, the easy borehole problems such as pollution.
2nd, size limitation and TRAJECTORY CONTROL problem: the hole diameter of existing radial horizontal drilling technology too little (25mm about) and long
It is impossible to carrying out measurement while drilling and following the tracks of orientation, well track is difficult to be monitored and controlled degree too short (100m about), range of application and
Effect of increasing production is extremely limited, cannot extensively apply.
3rd, circulation limits and fine pressure control problem: existing coiled tubing jet drilling radially horizontal well technology does not enable mistake entirely
Journey sealing and circulating and fine pressure control under balance pressure drilling, the oil-containing of discharge, sulfur-bearing, containing chemical agent, containing the waste residue such as natural gas, waste liquid,
The three wastes such as waste gas recycling and recycling difficulty is big, high cost, direct open flow set off the noise of formation, smog, dust and
Landwaste etc. pollutes environment.
Content of the invention
The technical problem to be solved is the problems referred to above existing for present level well drilling technology, provides one
Plant super carbon connecting leg spray horizontal well drilling system and spray drill method, solve currently employed clear water, water base, oil base, foam etc. as drilling well
Fluid, the problem that the down-hole problem existing during spray is bored is complicated, garbage is many, contaminative is big, improves bit speed, oil
Gas yield and Environmental Protection Level, reduce wellsite facility and drilling cost.
The present invention is achieved through the following technical solutions:
A kind of super carbon connecting leg sprays horizontal well drilling system, separates cycling element and super carbon connecting leg jet drilling list including super carbon is airtight
Unit, wherein,
Described super carbon is airtight to separate cycling element, for reclaiming the down-hole returns during spray is bored, therefrom separates, processes acquisition
Export after supercritical carbon dioxide to super carbon connecting leg jet drilling unit；
Described super carbon connecting leg jet drilling unit, for separating cycling element exports or outside input interpolation using super carbon is airtight
Supercritical carbon dioxide as drilling fluid, drilling fluid is transmitted to jet bit by coiled tubing, sprays horizontal well drilling.
Especially, the airtight cycling element that separates of described super carbon includes back pressure control device, super carbon extraction separator, super carbon gas
Separator, carbon dioxide tank, super canister, compressor and super carbon pump,
Described back pressure control device connects super carbon extraction separator, returns for the well head pressure during controlling spray to bore and annular space
Pressure；
Described super carbon extraction separator connects super carbon gasification separator, isolates in the down-hole returns during boring from spray
Supercritical carbon dioxide；
Described super carbon gasification separator connects carbon dioxide tank, for the supercritical titanium dioxide isolating super carbon extraction separator
Carbon blood pressure lowering is gasified, and isolates carbon dioxide, exports to carbon dioxide tank；
Described carbon dioxide tank connects compressor, for storing the carbon dioxide of super carbon gasification separator output；
Described compressor connects super canister and super carbon pump, and the carbon dioxide for exporting carbon dioxide tank is compressed into critical
Carbon dioxide；
Described super canister connects super carbon pump, for storing supercritical carbon dioxide compressor output or that input is added outward；
Described super carbon pump is used for by the storage of super canister or compressor output supercritical carbon dioxide pressure-increasing unit to super carbon even
Pipe inspection drilling unit.
Especially, described super carbon connecting leg jet drilling unit includes drilling fluid, coiled tubing, wireless measurement instrument, injection
Guider and jet bit, wherein,
Described drilling fluid is using the airtight supercritical carbon dioxide separating cycling element output of super carbon；
Described coiled tubing down-hole one end is connected with injection guider, and ground one end separate cycling element airtight with super carbon connects,
For by airtight for super carbon separate cycling element output supercritical carbon dioxide drilling fluid be sent to Downhole jetting guider and
Jet bit；
Described wireless measurement instrument is electrically connected with injection guider, simultaneously with ground control system wireless telecommunications, measures for real-time
Stratum characteristic in the drill-through journey of horizontal blowout and the relevant featuring parameters of well track, and be wirelessly transmitted to ground and control system
System；
Described injection guider is connected with jet bit, simultaneously with ground control system wireless telecommunications, for according to ground control
The instruction of system controls the injection direction of drill bit；
Described jet bit adopt one or more can wireless electric control direction nozzle, drilling fluid is sprayed at a high speed, breaks
Crushed rocks, form small horizontal hole.
A kind of above-mentioned super carbon connecting leg of application sprays the method that horizontal well drilling system sprays horizontal well drilling, specifically includes following steps:
A, super carbon connecting leg jet drilling unit separate cycling element output or outside input interpolation super facing using super carbon is airtight
Boundary's carbon dioxide, as drilling fluid, transmits drilling fluid to jet bit by coiled tubing, sprays horizontal well drilling；
The airtight down-hole returns separating during cycling element reclaims spray brill of b, super carbon, therefrom separate, process acquisition supercritical
Export after carbon dioxide to super carbon connecting leg jet drilling unit.
Especially, described step b specifically includes:
B1, back pressure control device control the down-hole returns reclaiming during spray is bored to enter excess of imports carbon extraction separator；
B2, super carbon extraction separator isolate supercritical carbon dioxide from the returns of down-hole, export to super carbon gasification separator；
The supercritical carbon dioxide that super carbon extraction separator exports is carried out blood pressure lowering gasification process by b3, super carbon gasification separator, obtains
Obtain carbon dioxide gas storage；
The carbon dioxide of storage is compressed processing by b4, compressor, obtains supercritical carbon dioxide storage；
The supercritical carbon dioxide of storage is delivered to super carbon connecting leg jet drilling unit by b5, super carbon pump.
The present invention compared with prior art, has such advantages as and beneficial effect:
1st, improve bit speed: overall process adopts coiled tubing and supercritical carbon dioxide fine pressure control under balance pressure drilling, favorably
In be greatly improved salt cream, mud stone, shale, low pressure, readily soluble, easily swollen, leakiness, easily collapse, the power auger of Yi Ka, the easy bad ground such as spray
Speed and remove speed.Compare than conventional drilling, bit speed more than 30% can be improved.
2nd, improve oil and gas production: super carbon connecting leg spray horizontal well drilling system overall process is followed using supercritical carbon dioxide is airtight
Ring, not only pollution-free to oil-gas Layer, be conducive to reservoir protection, and nearly well band effective permeability can be improved, reduce crude oil
Viscosity, improves swept volume, well yield and ultimate recovery.
3rd, improve Environmental Protection Level: super carbon connecting leg spray horizontal well drilling system overall process total enclosing supercritical carbon dioxide circulation is no
Outer row, no waste water, useless slurry.Well drilling detritus separate not oily and chemical addition agent, complete environmental protection through critical carbon dioxide extraction
Pollution-free.Extract the oil isolated with two-stage, gas, hydrogen sulfide etc. through super carbon, can not set off complete hermetic reclaim.
4th, reduce drilling cost: super carbon connecting leg spray horizontal well drilling system can improve bit speed, well yield, Environmental Protection Level
With minimizing wellsite facility.Drilling and well completion investment not only can be reduced, and coordinate supercritical carbon dioxide infiltration stone fracturing process
Individual well drilling gross investment and oil gas field long period of operation maintenance cost can be saved.
Brief description
Accompanying drawing described herein is used for providing the embodiment of the present invention is further understood, and constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
The super carbon connecting leg spray horizontal well drilling system flow chart that Fig. 1 provides for the embodiment of the present invention 1.
Fig. 2 bores single branch horizontal well profile for the super carbon connecting leg spray that the embodiment of the present invention 1 provides.
Fig. 3 bores bi-lateral horizontal well profile for the super carbon connecting leg spray that the embodiment of the present invention 1 provides.
Fig. 4 bores double-deck or multi-layer and multi-directional horizontal well profile for the super carbon connecting leg spray that the embodiment of the present invention 1 provides.
Fig. 5 bores wall scroll fishbone horizontal well plane graph for the super carbon connecting leg spray that the embodiment of the present invention 2 provides.
Fig. 6 bores double bar fishbone horizontal well plane graphs for the super carbon connecting leg spray that the embodiment of the present invention 3 provides.
Specific embodiment
For making the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in figure 1, the super carbon connecting leg spray horizontal well drilling system flow chart that Fig. 1 provides for the embodiment of the present invention 1.
Disclose a kind of super carbon connecting leg in the present embodiment and spray horizontal well drilling system, include the airtight separately cycling element of super carbon with
Super carbon connecting leg jet drilling unit, wherein,
The airtight cycling element that separates of described super carbon is arranged on ground, reclaims super carbon connecting leg jet drilling unit during spray is bored
Produce down-hole returns, therefrom separate, process acquisition supercritical carbon dioxide after export to super carbon connecting leg jet drilling unit,
Specifically include the back pressure control device being sequentially connected through pipeline, super carbon extraction separator, super carbon gasification separator, carbon dioxide
Tank, compressor, super canister and super carbon pump.
Described back pressure control device is arranged at well head, and its entrance connects the annular space of horizontal hole, and outlet connects super carbon
Extraction separator.Super carbon connecting leg jet drilling unit produces a large amount of garbages during spray is bored and returns out from down-hole, including
Drilling fluid, broken landwaste and formation oil air water etc., back pressure control device controls the pressure of the annular space of horizontal hole to reach
To certain numerical value, thus ensureing that garbage returns well head from the annular space of horizontal hole, enter through back pressure control device
Super carbon extraction separator.Preferably, described back pressure control device adopts back pressure control valve.
The garbage returning on the annular space of well is carried out separating by described super carbon extraction separator, and its entrance connects back pressure
Control device, accesses the down-hole returns that the drill-through journey of spray produces；Outlet connects super carbon gasification separator, exports super facing of isolating
Boundary's carbon dioxide；Two passages are separately had to export the broken landwaste isolated and natural gas respectively.
Supercritical carbon dioxide blood pressure lowering that super carbon extraction separator is exported by described super carbon gasification separator, gasify and carry out
Double purification separates, and its entrance connects super carbon extraction separator outlet, accesses the supercritical dioxy of super carbon extraction separator output
Change carbon；Outlet connects carbon dioxide tank, output buck, the carbon dioxide gasifying, isolating；Two output channels are separately had to divide
Do not export the crude oil isolated and water.
The entrance of described carbon dioxide tank connects super carbon gasification separator outlet, accesses the two of super carbon gasification separator output
Carbon oxide gas are stored；Outlet connects compressor, the carbon dioxide of output storage.
The entrance of described compressor connects the outlet of carbon dioxide tank, accesses carbon dioxide；Outlet connects super canister
With super carbon pump, the carbon dioxide that carbon dioxide tank is exported is pressurized, and exports supercritical carbon dioxide.
The entrance of described super canister connects the outlet of compressor, and the supercritical carbon dioxide accessing compressor output is deposited
Storage；Outlet connects super carbon pump, the supercritical carbon dioxide of output storage.
Described super carbon pump connects super canister and compressor, by the storage of super canister or compressor output supercritical titanium dioxide
Carbon is delivered to super carbon connecting leg jet drilling unit.In a supercritical state for ensureing carbon dioxide, the supercritical of super carbon pump output
Pressure carbon dioxide is not less than 8mpa, and temperature control is in 32 DEG C of range above.It should be noted that described supercritical titanium dioxide
Carbon control temperature and pressure scope according to the constituent contents such as the landwaste of horizontal well drilled strata, oil, gas and water and hydrogen sulfide and
Dissolubility in super carbon is optimized design.
Described super carbon connecting leg jet drilling unit, sprays horizontal well drilling, tool using supercritical carbon dioxide as drilling fluid
Body includes supercritical carbon dioxide jet fluid, wireless measurement instrument, the coiled tubing being mechanically connected successively, injection guider and spray
Penetrate drill bit, described coiled tubing includes ground coiled tubing (abbreviation ground connecting leg) and underground continuous oil pipe (abbreviation down-hole company
Pipe), described jet bit adopts supercritical carbon dioxide jet bit, the airtight supercritical two separating cycling element output of super carbon
Carbonoxide is spouting through coiled tubing, injection guider, jet bit successively, forms supercritical carbon dioxide jet, drives
Jet bit crushes the rock formation landwaste of down-hole, forms horizontal hole.
Described wireless measurement instrument and injection pilot unit all with ground control system wireless telecommunications, wireless measurement instrument surveys in real time
Well track and the stratum such as the hole angle of the amount down-hole spray small horizontal well of brill, azimuth, tool face azimuth, resistivity, natural potential
Characteristic, and be wirelessly transmitted to ground control system and be monitored, ground control system is automatically by itself and horizontal well
Planned course compares, if track is deviateed exceedes setting value, control system automated wireless transmission adjustment path instructions arrive down-hole
Injection guider, injection guider, according to instruction unpack nozzle and adjustment injection direction, adjusts hole angle, the side of spray horizontal well drilling
Parallactic angle, tool face azimuth, producing motive force makes drill bit be partial to planned course direction, corrects wellbore trace.
A kind of method that horizontal well drilling system spray horizontal well drilling is sprayed using above-mentioned super carbon connecting leg is also disclosed in the present embodiment,
Comprise the following steps:
S1, super carbon connecting leg jet drilling unit are using the airtight supercritical carbon dioxide separating cycling element output of super carbon as brill
Well fluids, transmit drilling fluid to jet bit by coiled tubing, spray horizontal well drilling.
As shown in Figure 2, Figure 3, Figure 4, Fig. 2 bores single branch horizontal well for the super carbon connecting leg spray that the embodiment of the present invention 1 provides and cuts open
Face figure, Fig. 3 bores bi-lateral horizontal well profile for the super carbon connecting leg spray that the embodiment of the present invention 1 provides, and Fig. 4 is the embodiment of the present invention
Double-deck or multi-layer and multi-directional horizontal well profile is bored in the super carbon connecting leg spray of 4 offers.
Bore single branch levels for the spray of super carbon connecting leg, monolayer multi-branched horizontal well is bored in the spray of super carbon connecting leg and the spray of super carbon connecting leg is bored
Multi-layer and multi-directional horizontal well, in described step s1, super carbon connecting leg jet drilling unit adopts supercritical carbon dioxide spray horizontal well drilling tool
Body comprises the following steps:
S101, stepout well to top of oil horizon in advance setting of casing well cementation, be drilled casing hardware and oil-gas Layer led eye and logged well, or will
Old well oil gas interval top casing sidetracking, or forging milling become bore hole.
Rig bores new straight well section and previously cemented the well in top of oil horizon setting of casing, is drilled casing hardware and oil-gas Layer is led eye and surveyed
Well, or become bore hole by complete for old well oil gas interval top casing firing milling.
S102, led with the new well of connecting leg cementing plug sealing eye section or old well forging milling Open-Hole Section.
S103, supercritical carbon dioxide are sprayed by jet bit, spray horizontal well drilling inclination section and horizontal segment.
S104, connecting leg drag sectional ejecting pressure break or acidifying.
S105, repeated execution of steps s103, s103, described step s103, s2104 often executes once, completes a direction
Horizontal well.
S106, act spray and bore coiled tubing and downhole instrument and instrument.
S107, under enter the coiled tubing with underseal well head and hang, carry out discharge opeing, oil recovery or gas production, or water filling, gas injection,
Note poly- etc..
S2, super carbon is airtight to be separated cycling element and reclaims down-hole returns during spray is bored, therefrom separates, to process acquisition super
Export after critical carbon dioxide to super carbon connecting leg jet drilling unit.
Described step s102 specifically includes:
S201, back pressure control device control the garbage reclaiming generation during spray is bored to enter excess of imports carbon extraction separator.
S202, super carbon extraction separator isolate supercritical carbon dioxide from garbage, export and separate to super carbon gasification
Device.
The supercritical carbon dioxide that super carbon extraction separator exports is carried out blood pressure lowering, gasification by s203, super carbon gasification separator
Process, obtain carbon dioxide gas storage.
The carbon dioxide of storage is compressed processing by s204, compressor, obtains supercritical carbon dioxide storage.
The supercritical carbon dioxide of storage is delivered to super carbon connecting leg jet drilling unit by s205, super carbon pump.
Super carbon connecting leg jet drilling unit produces a large amount of garbages, including supercritical titanium dioxide in course of injection
Carbon, broken landwaste and formation oil air water etc..Back pressure control device controls the pressure of the annular space of horizontal hole to reach necessarily
Numerical value, supercritical carbon dioxide carries the broken landwaste and formation oil air water the like waste annular from horizontal well and peupendicular hole
Spatially return well head, enter excess of imports carbon extraction separator through back pressure control device, super carbon extraction separator is by solid phase landwaste, liquid phase
After profit separates with supercritical carbon dioxide, gas phase natural gas, respectively airtight output, wherein, liquid phase profit and supercritical dioxy
Change the carbon super carbon gasification separator of access and carry out blood pressure lowering and secondary separation, be further separated out crude oil and water and carbon dioxide gass
Body, wherein, carbon dioxide accesses carbon dioxide tank and is stored, and carbon dioxide supercharging temperature control is arrived by compressor afterwards
Supercriticality accesses super canister and is stored, or through super carbon pump pressurization cycle to super carbon connecting leg jet drilling unit, as brill
Well fluids carry out spray and bore.
Embodiment 2
As shown in figure 5, Fig. 5 bores wall scroll fishbone horizontal well plane graph for the super carbon connecting leg spray that the embodiment of the present invention 2 provides.
The present embodiment 2 is directed to super carbon connecting leg spray and bores wall scroll fishbone horizontal well, is bored using the super carbon connecting leg spray described in embodiment 1
Horizontal well system, its super Carbon cycle separating step is identical with step s1 in embodiment 1, and difference is s2: using supercritical two
Wall scroll fishbone horizontal well is bored in carbonoxide spray, specifically includes following steps:
S301, stepout well, in top of oil horizon setting of casing well cementation in advance, are drilled casing hardware and oil-gas Layer are led eye and logged well, or will be old
Well oil gas interval top casing sidetracking, or forging milling become bore hole.
S302, led with the new well of connecting leg cementing plug sealing eye section or old well forging milling Open-Hole Section.
S303, supercritical carbon dioxide are sprayed by jet bit, and the main horizontal well of wall scroll fish ridge is bored in spray.
S304, continue plane and turn to bore first fish spicule horizontal well from main horizontal bottom.
S305, connecting leg drag sectional ejecting pressure break or acidifying.
S306, repeated execution of steps s203, s204, s205, from main horizontal bottom progressively move injection complete a plurality of fish
Thorn horizontal well drilling, pressure break or acidifying.
S307, act spray and bore coiled tubing and downhole instrument and instrument.
S308, under enter the coiled tubing with underseal well head and hang, carry out discharge opeing, oil recovery or gas production, or water filling, gas injection,
Note poly- etc..
Embodiment 3
As shown in fig. 6, Fig. 6 bores double bar fishbone horizontal well plane graphs for the super carbon connecting leg spray that the embodiment of the present invention 3 provides.
The present embodiment 3 is directed to super carbon connecting leg spray and bores double bar fishbone horizontal wells, is bored using the super carbon connecting leg spray described in embodiment 1
Horizontal well system, its super Carbon cycle separating step is identical with step s1 in embodiment 1, and difference is s2: using supercritical two
Double bar fishbone horizontal wells are bored in carbonoxide spray, specifically include following steps:
S401, stepout well, in top of oil horizon setting of casing well cementation in advance, are drilled casing hardware and oil-gas Layer are led eye and logged well, or will be old
Well oil gas interval top casing sidetracking, or forging milling become bore hole.
S402, led with the new well of connecting leg cementing plug sealing eye section or old well forging milling Open-Hole Section.
S403, supercritical carbon dioxide are sprayed by jet bit, the main horizontal well of spray first fish ridge of brill.
S404, continue plane and turn to bore first fish spicule horizontal well from main horizontal bottom.
S405, connecting leg drag sectional ejecting pressure break or acidifying.
S406, repeated execution of steps s4103, s4104, s4105, progressively shifting from main horizontal bottom and complete a plurality of fish spicule
Horizontal well drilling, pressure break or acidifying.
The main horizontal well of Article 2 fish ridge is bored in s407, the spray of super carbon connecting leg.
S408, continue plane from main horizontal bottom and turn to first fish spicule horizontal well boring Article 2 fishbone.
S409, connecting leg drag sectional ejecting pressure break.
S410, repeated execution of steps s307, s308, s309, complete two or more pieces fishbone horizontal well drilling, pressure break or acid
Change.
S411, act spray and bore coiled tubing and downhole instrument and instrument.
S412, under enter the coiled tubing with underseal well head and hang, carry out discharge opeing, oil recovery or gas production, or water filling, gas injection,
Note poly- etc..
Technical scheme adopts supercritical carbon dioxide and coiled tubing to spray guiding, fine pressure control, underbalance
New methods of drilling, the monitoring of effectively solving small horizontal hole track and water-sensitive, readily soluble, easily collapse, Yi Ka, leakiness, easily spray, easily stifled,
The easily borehole problems such as pollution, increases Microdrilling diameter to 50-100mm, growth level segment length to more than 1000m；With
The airtight extract and separate round-robin method high-efficient purification of super carbon isolates landwaste, oil, gas and water and carbon dioxide, and recycles, and solves
The problem of environmental pollutions such as noise, smog, dust and the landwaste that directly open flow discharge combustion combustion is formed.Thus effectively reducing Horizontal Well Drilling
Well cost, improve bit speed, increase oil and gas production and improve Environmental Protection Level, adopting in the volume increase of conventional gas and oil old well production potential tapping and raising
The Mud Motors in Slim-hole Horizontal Well drilling well aspect such as yield and unconventional coal bed gas, shale gas, fine and close oil gas, viscous crude, combustible ice is generally applicable.
Above-described specific embodiment, has been carried out to the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be should be understood that the specific embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., all should comprise
Within protection scope of the present invention.
Claims (5)
1. a kind of super carbon connecting leg spray horizontal well drilling system is it is characterised in that the super carbon of inclusion airtight separation cycling element and super carbon connect
Pipe inspection drilling unit, wherein,
Described super carbon is airtight to separate cycling element, for reclaiming the down-hole returns during spray is bored, therefrom separates, processes acquisition
Export after supercritical carbon dioxide to super carbon connecting leg jet drilling unit；
Described super carbon connecting leg jet drilling unit, for separating cycling element exports or outside input interpolation using super carbon is airtight
Supercritical carbon dioxide as drilling fluid, drilling fluid is transmitted to jet bit by coiled tubing, sprays horizontal well drilling.
2. super carbon connecting leg spray horizontal well drilling system according to claim 1 is it is characterised in that the airtight separation of described super carbon follows
Ring element includes back pressure control device, super carbon extraction separator, super carbon gasification separator, carbon dioxide tank, super canister, compressor
With super carbon pump,
Described back pressure control device connects super carbon extraction separator, returns for the well head pressure during controlling spray to bore and annular space
Pressure；
Described super carbon extraction separator connects super carbon gasification separator, isolates in the down-hole returns during boring from spray
Supercritical carbon dioxide；
Described super carbon gasification separator connects carbon dioxide tank, for the supercritical titanium dioxide isolating super carbon extraction separator
Carbon blood pressure lowering is gasified, and isolates carbon dioxide, exports to carbon dioxide tank；
Described carbon dioxide tank connects compressor, for storing the carbon dioxide of super carbon gasification separator output；
Described compressor connects super canister and super carbon pump, and the carbon dioxide for exporting carbon dioxide tank is compressed into critical
Carbon dioxide；
Described super canister connects super carbon pump, for storing supercritical carbon dioxide compressor output or that input is added outward；
Described super carbon pump is used for by the storage of super canister or compressor output supercritical carbon dioxide pressure-increasing unit to super carbon even
Pipe inspection drilling unit.
3. super carbon connecting leg spray horizontal well drilling system according to claim 1 is it is characterised in that described super carbon connecting leg jet drilling
Well unit includes drilling fluid, coiled tubing, wireless measurement instrument, injection guider and jet bit, wherein,
Described drilling fluid is using the airtight supercritical carbon dioxide separating cycling element output of super carbon；
Described coiled tubing down-hole one end is connected with injection guider, and ground one end separate cycling element airtight with super carbon connects,
For by airtight for super carbon separate cycling element output supercritical carbon dioxide drilling fluid be sent to Downhole jetting guider and
Jet bit；
Described wireless measurement instrument is electrically connected with injection guider, simultaneously with ground control system wireless telecommunications, measures for real-time
Stratum characteristic in the drill-through journey of horizontal blowout and the relevant featuring parameters of well track, and be wirelessly transmitted to ground and control system
System；
Described injection guider is connected with jet bit, simultaneously with ground control system wireless telecommunications, for according to ground control
The instruction of system controls the injection direction of drill bit；
Described jet bit adopt one or more can wireless electric control direction nozzle, drilling fluid is sprayed at a high speed, breaks
Crushed rocks, form small horizontal hole.
4. a kind of method applying described super carbon connecting leg as arbitrary in claims 1 to 3 to spray horizontal well drilling system spray horizontal well drilling,
It is characterized in that, specifically include following steps:
A, super carbon connecting leg jet drilling unit separate cycling element output or outside input interpolation super facing using super carbon is airtight
Boundary's carbon dioxide, as drilling fluid, transmits drilling fluid to jet bit by coiled tubing, sprays horizontal well drilling；
The airtight down-hole returns separating during cycling element reclaims spray brill of b, super carbon, therefrom separate, process acquisition supercritical
Export after carbon dioxide to super carbon connecting leg jet drilling unit.
5. the method for spray horizontal well drilling according to claim 4 is it is characterised in that described step b specifically includes:
B1, back pressure control device control the down-hole returns reclaiming during spray is bored to enter excess of imports carbon extraction separator；
B2, super carbon extraction separator isolate supercritical carbon dioxide from the returns of down-hole, export to super carbon gasification separator；
The supercritical carbon dioxide that super carbon extraction separator exports is carried out blood pressure lowering gasification process by b3, super carbon gasification separator, obtains
Obtain carbon dioxide gas storage；
The carbon dioxide of storage is compressed processing by b4, compressor, obtains supercritical carbon dioxide storage；
The supercritical carbon dioxide of storage is delivered to super carbon connecting leg jet drilling unit by b5, super carbon pump.
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