CN104712292A - Ultrasonic blockage removal technology and blockage removal device - Google Patents
Ultrasonic blockage removal technology and blockage removal device Download PDFInfo
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- CN104712292A CN104712292A CN201510114520.XA CN201510114520A CN104712292A CN 104712292 A CN104712292 A CN 104712292A CN 201510114520 A CN201510114520 A CN 201510114520A CN 104712292 A CN104712292 A CN 104712292A
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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
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Abstract
The invention relates to an ultrasonic blockage removal technology and a blockage removal device which are used for clearing blockages formed in an oil well during oil extraction. The device is mainly composed of a well testing truck, a transmission cable, a high-power ultrasonic electric signal transmitter and an ultrasonic electro-acoustic transducer. High-power pulse electric oscillation signals generated by the vehicle-mounted high-power ultrasonic transmitter on the ground are transmitted to the piezoelectric ceramic electro-acoustic transducer on an oil layer through the special transmission cable, then converted into ultrasonic waves through the electro-acoustic transducer, and injected into an oil bearing formation, so that the physical property and flow state of fluid in the oil layer are changed, the circulating condition and permeability of the bottom of the well and a near-well oil layer are improved, blockages are removed, scale prevention and removal are achieved, paraffin control is achieved, oil production capacity is improved, the viscosity of crude oil is reduced, and then permeability and recovery efficiency can be improved, injection rate is increased, and injection allocation is achieved.
Description
Technical field
The present invention relates to a kind of oil recovery to produce, to formed in oil-water well obstruction clear up time ultrasonic wave de-plugging process used and plug-removing device.
Background technology
In oil-water well recovery process, because reservoir temperature, pressure, the condition such as moisture constantly change, to destroy reservoir thermodynamic equilibrium state, the paraffin in reservoir fluid is made to separate out from crude oil and precipitate, and inject water impurity, injection of polymer, form some obstructions in oil well, hinder crude oil to flow in pit shaft, reduce reservoir porosity and permeability, affect oily well yield and oil recovery rate.And current method for removing blockage mainly through injecting chemical agent in reservoir, utilize chemical reaction heat-dissipating and high solubility to remove paraffin deposit, obtain certain effect with scene application, but chemical plugging removal construction is complicated, cost is high, there is reservoir secondary pollution risk.Also to environment.
Summary of the invention
In order to effectively remove the various blockings on stratum, in-place permeability can be improved simultaneously and reduce viscosity of crude, the invention provides a kind of ultrasonic wave de-plugging process and plug-removing device.The ultrasonic wave de-plugging process utilizing this device to implement can remove near wellbore zone oil layer pollution effectively, improves reservoir permeability, removes obstruction around the borehole wall, dredging oil flow channel; Construction safety is reliable, efficiency is high, and technique is simple, and cost is low, non-environmental-pollution.
Technical scheme of the present invention is: a kind of Ultasonic dredging apparatus, comprises well testing truck and well head, establishes mid-board in the compartment of described well testing truck, and compartment is divided into anterior operational window and the winch cabin at rear portion by mid-board; Described winch cabin internal fixtion has generator, for being wound around the double-drum winch of transmission cable and steel wire, and middle part is fixed with Martin Decker by Martin Decker support in winch cabin, Martin Decker is provided with photoelectric encoder, photoelectric encoder measures cable and the steel wire degree of depth and image data, in winch cabin, the rear on right side is fixed with cable-coiling drum, cable-coiling drum side is connected with generator, and opposite side is connected with Martin Decker; The lower end of described transmission cable is connected with the piezoelectric ceramic electro-acoustic conversion of down-hole through well head pulley, piezoelectric ceramic electro-acoustic conversion lower end is connected with superconduction rod, superconduction rod lower end is connected with superconduction rod weighted lever, is wrapped on double-drum winch after Martin Decker is walked around in the upper end of described transmission cable; Described operational window internal fixtion has winch console and power distribution cabinet, and winch console is provided with ultrasonic control device; Described winch cabin internal fixtion is tensioned takes into account tension signal transmission cable dish, is connected after tension signal transmission cable dish walked around by tension signal cable with the tension force panel in the console in operational window.
Described well head is connected with lubricator, and the top of lubricator side is connected with well head pulley, and well head pulley is provided with the anti-jump card of wire; Be fixed with strand ring in the middle part of described lubricator, the side of strand ring is fixed with chain adapter, and chain adapter lower end and tube connector grafting, tube connector lower end is connected with the supporting seat being fixed on ground.
Utilize the de-plugging process that above-mentioned Ultasonic dredging apparatus is implemented, utilize the highpowerpulse electric oscillation signal that ground on-vehicle large power supersonic wave transmitter produces, pass through transmission cable, Pulse Electric oscillator signal is transferred on the piezoelectric ceramic electro-acoustic conversion of oil reservoir, convert ultrasonic wave to through electroacoustic transducer, inject in oil bearing bed, improve circulation condition and the permeability of shaft bottom, closely well oil reservoir, remove obstruction around the borehole wall, dredging oil flow channel; Concrete steps are as follows: after well testing truck to well location, 1. carry out that well head is emptying, release install lubricator; 2. drifting, and at well head, directive wheel is installed; 3. wire hanger piezoelectric ceramic electro-acoustic conversion, imports down-hole with transmission cable, determines superconducting layer position and counts; 4. starter-generator and ultrasonic control device carry out ultrasound stimulation to each point successively according to the some position set, voltage and ultrasonic stimulation time; 5. reverse operating trips out piezoelectric ceramic electro-acoustic conversion; 6. backwash is carried out to this well; 7. with pump truck pressurization dredging interlayer waterflood path.
The invention has the beneficial effects as follows: this ultrasonic wave de-plugging process and plug-removing device, mainly utilize the highpowerpulse electric oscillation signal that ground on-vehicle large power supersonic wave transmitter produces, pass through special transmission cable, Pulse Electric oscillator signal is transferred on the piezoelectric ceramic electro-acoustic conversion of oil reservoir, ultrasonic wave is converted to through electroacoustic transducer, inject in oil bearing bed, improve circulation condition and the permeability of shaft bottom, closely well oil reservoir, remove obstruction around the borehole wall, antiscaling, descaling, wax control, improve oil production, reduce former oil viscosity, dredging oil flow channel.This ultrasonic wave method for removing blockage is safe and reliable, efficiency is high, technique is simple, cost is low, non-environmental-pollution, effectively can remove the various blockings on stratum, in-place permeability can be improved simultaneously and reduce viscosity of crude, be particularly useful for the sensible reservoir that reservoir is vulnerable to damage, may be used for the Particle Blocking well that well-flushing and operation etc. cause, also may be used for the organic plugging of heavy oil wells, easily paraffin-troubled well, can combine with pump detection and workover, become conventional treatment measure, oil increasing effect is remarkable, is convenient to spread.
Accompanying drawing explanation
Fig. 1 is right view of the present invention;
Fig. 2 is top view of the present invention;
Fig. 3 is the schematic diagram that the present invention is connected with well head;
Fig. 4 to Figure 11 is respectively the de-plugging interval water suction curves figure of each embodiment.
1-generator in figure, 2-double-drum winch, 3-cable-coiling drum, 4-hydraulic oil container, 5-piezoelectric ceramic electro-acoustic conversion, 6-superconduction rod, 7-Martin Decker, 8-superconduction rod weighted lever, the ultrasonic control device of 9-, 10-winch console, 11-power distribution cabinet, 12-tensiometer, 13-tension signal transmission cable dish, 14-mid-board, 15-well head pulley, 16-lubricator, 17-inverter, 18-mudhole, 19-twists ring, and 20-chain is taken over, 21-tube connector, 22-supporting seat, the anti-jump card of 23-wire, 24-superconduction special frame.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
By shown in Fig. 1 to Fig. 3, this ultrasonic wave de-plugging process and plug-removing device, mainly utilize the highpowerpulse electric oscillation signal that ground on-vehicle large power supersonic wave transmitter produces, pass through special transmission cable, Pulse Electric oscillator signal is transferred on the piezoelectric ceramic electro-acoustic conversion of oil reservoir, ultrasonic wave is converted to through electroacoustic transducer, inject in oil bearing bed, improve circulation condition and the permeability of shaft bottom, closely well oil reservoir, remove obstruction around the borehole wall, antiscaling, descaling, wax control, improve oil production, reduce former oil viscosity, dredging oil flow channel.
Described Ultasonic dredging apparatus, comprises well testing truck and well head, establishes mid-board 14 in the compartment of described well testing truck, and compartment is divided into anterior operational window and the winch cabin at rear portion by mid-board 14; Described winch cabin internal fixtion has generator 1, double-drum winch 2, two cylinders of double-drum winch 2 are respectively used to be wound around transmission cable and steel wire, and middle part is fixed with Martin Decker 7 by Martin Decker support in winch cabin, Martin Decker 7 is provided with photoelectric encoder, photoelectric encoder can measure cable and the steel wire degree of depth and image data, and Martin Decker 7 is fixed by hinge bar and mid-board 14.Operationally, Martin Decker 7 takes off by support, when double-drum winch 2 rotates, hinge bar drives Martin Decker 7 transverse reciprocating to swing, and makes to walk around cable on Martin Decker 7 and steel wire and is wrapped in uniformly on twin-roll winch 2 or by twin-roll winch 2 and puts down.In winch cabin, the rear in left side is fixed with hydraulic oil container 4, and the rear on right side is fixed with cable-coiling drum 3, and cable-coiling drum 3 side is connected with generator 1 or external power supply, and opposite side is connected with Martin Decker 7.
The lower end of described transmission cable is connected with the piezoelectric ceramic electro-acoustic conversion 5 of down-hole through well head pulley 15, and wherein piezoelectric ceramic electro-acoustic conversion 5 one aspect is connected with transmission cable and carries out Signal transmissions, is connected with the steel wire on double-drum winch 2 simultaneously.Piezoelectric ceramic electro-acoustic conversion 5 lower end is connected with superconduction rod 6, and superconduction rod 6 sends ultrasonic wave, and superconduction rod 6 lower ends are connected with superconduction rod weighted lever 8.Be wrapped on the cable drum of double-drum winch 2 after Martin Decker 7 is walked around in the upper end of described transmission cable.Described operational window internal fixtion has winch console 10 and power distribution cabinet 11, and winch console 10 is provided with ultrasonic control device 9, and is provided with various hydraulic instrument, throttle control handle, pressure-control valve and various switch; Sidewall in operational window is also fixed with inverter 17, and inverter is DC voltage 24V, inverter voltage 220V, power 600W, and model is COTEK 3600-124, for the instruments such as the computer that this plug-removing device configures outward are powered.
The described tensioned meter 12 of winch cabin internal fixtion and tension signal transmission cable dish 13, be connected with the console 10 in operational window after tension signal transmission cable dish 13 walked around by tension signal cable, tensiometer and well head pulley 15 mating reaction, the tension force of transmission cable is become the tension force panel that the signal of telecommunication sends in console 10 through tension signal transmission cable dish 13 show, or send ground instrument to carry out record, by the change of cable stretch, accurately judge the operating condition of downhole instrument and cable.
Described well head is connected with lubricator 16, lubricator 16 can be used for that well head is emptying, release, and the top of lubricator 16 side is connected with well head pulley 15, and well head pulley 15 is for being transmission cable guiding, and well head pulley 15 is provided with the anti-jump card 23 of wire; Strand ring 19 is fixed with in the middle part of described lubricator 16, the side of strand ring 19 is fixed with chain adapter 20, chain adapter 20 lower end and tube connector 21 grafting, tube connector 21 lower end is connected with the supporting seat 22 being fixed on ground, chain adapter 20, tube connector 21 and supporting seat 22 form the anti-of lubricator and forget about it device, centralizing function can be played to lubricator 16, prevent lubricator 16 from tilting.
In addition, fuel oil type independence warm air system installed by this well testing truck car load, and the heater of warm air system is arranged on the left of the tailstock of left side in side luggage chamber, and fin is arranged on the left of front storehouse; Above-mentioned operational window is just being established, copilot's door, and vehicle body right side central establishes pneumatic foldable passenger door, and the power distribution cabinet 11 in operation storehouse is provided with various insurance, switch, instruction class, electrical appliance switch, socket etc., can realize the startup of motor, stops working in operational window; Car rear portion, winch cabin is container-type back pullout (BPO) structure, and concealed getting on the bus is marked time; Double-drum winch 2 in winch cabin is existing conventional double-drum winch in industry, transmission adopts hydraulic closed circulation, adopt U.S. Sa Australia H1P068 type hydraulic pump and German BOSCH-REXROTH A6VE63 plunger piston hydraulic motor, the built-in planetary reducer of cylinder, hydraulic system possesses tension force overload interlock automatic protection functions, and when cable tension is more than or equal to preset tension force, winch can brake hard at once automatically, valve off-load, ensures the safety test of instrument; The structure of double-drum winch 2 adopts coaxial pair to roll structure, and cylinder adopts split Type of Welding, and winch adopts belt braking, material selection nonmagnetic steel, and relative permeability is less than 1.1; Cylinder cable capacity: 2000 meters (ф 13.7mm)+2000 meters (ф 2.4mm); Cable speed: 200-5000m/h; Winch maximum pull: 15KN; Winch row cable adopts oil cylinder swing arm row cable mode, and row's cable operating valve is installed on the operating desk in operation storehouse, and the motion of row's cable is consistent with cable/steel wire process, makes cable/steel wire discharge neat; Cylinder bottom backplate leaves a mudhole 18.Generator 1 in winch cabin is ocean diesel-driven generator TSV160000 type (10KW/220V/50HZ), is arranged on the right side of rear afterbody, opens maintenance window at generator bay, so that maintenance process simulation; Increase external 220V power supply, can power supply be changed with generator 220V power supply, general supply switchboard configuration electric protective circuit breaker, transfer switch, insurance, 220V socket, the power supply controls such as illumination and other electrical appliance.
Utilize the de-plugging process that above-mentioned Ultasonic dredging apparatus is implemented, concrete steps are as follows:
1. safe preparation: after well testing truck arrives well location, is parked in distance pithead position 10m-15m place, guarantees handling safety;
2. emptying, the release of well head: install the atmospheric valve with snap joint on well head, open emptying gate, the sewage of discharge flows in gulley emptier by hose; Emptying time is generally 10 minutes-15 minutes;
3. lubricator is installed: lubricator 16 is installed on wellhead venting gate, and fixes the anti-of lubricator and forget about it device; Well head pulley 15 is fixed on lubricator 16, the pulley groove of well head pulley 15 after installation, must be made to align with the centre of the drum of double-drum winch 2;
4. carry out drifting operation, with guarantee superconduction rod 6 smoothly by: steel wire is connected with the drifting device carried with car, leads through well head pulley 15, import down-hole carry out drifting; If there is the position that is hampered, need to iterate through, guarantee that tubing string is unimpeded; Wherein the centre of the drum of the pulley groove of well head pulley 15, steel wire, Martin Decker calculating instrument, double-drum winch 2 must be in alignment;
5. import piezoelectric ceramic electro-acoustic conversion toward down-hole: after down-hole string is unimpeded, drifting device is taken out, then superconduction special frame 24 is taken off by winch cabin, the piezoelectric ceramic electro-acoustic conversion 5 be placed in the dextral platform of winch cabin to be arranged on superconduction special frame 24, by professional, piezoelectric ceramic electro-acoustic conversion 5 is put into pit shaft, the pulley groove of well head pulley 15 is put into after data cable is connected with piezoelectric ceramic electro-acoustic conversion 5, buckle well the anti-jump card of wire on pulley, guarantee pulley groove, superconducting line, Martin Decker calculating instrument, the centre of the drum of double-drum winch 2 point-blank,
6. carry out superconduction de-plugging operation: according to the well tables of data of this well, determine superconducting layer position, in each superconducting layer position, to carry out superconduction every 1 meter, finally determine that superconduction is counted, 10 minutes-15 minutes each superconduction point ultrasonic stimulation time; Start the generator 1 that well testing truck is provided for oneself, Control of Voltage is between 200V-220V; Open unblocking controller for oil-water well by the control button on console, usual electric current between 15A-20A, if tubing string in and interlayer in foreign material or obturator more, then electric current is between 20A-25A, the frequency 20000 times/second, when there being electric current to increase suddenly, answers hard stop inspection; Carry out reverse operating after superconduction is complete, trip out piezoelectric ceramic electro-acoustic conversion, then carry out backwash, wash out the foreign material after superconduction, be used for water pipeline recoil well-flushing, the superconduction that spues formed shaft bottom foreign material;
7. last, with pump truck pressurization dredging interlayer waterflood path.
Above-mentioned ultrasonic wave produces following several respects effect in underground:
1, shock oscillation stripping effect: the intense ultrasonic wave that directed boundling is launched acts on oil reservoir, crude oil liquid, oil reservoir rock and solid particle just can vibrate with ultrasonic wave, because the intrinsic frequency of each liquid, rock stratum, solid particle is different, so the vibration acceleration produced separately is also different with amplitude, cause two kinds of phase material interface generation relative motions.Thus reach following object: 1. obstruction particle and the affinity between rock stratum, profit and particle reduce, and produce relative motion and loosen, flows, and releasing blocks; 2. the former dirt be attached on rock stratum hole and venturi comes off, with in direction of flow pit shaft, dredges oil flow channel; 3. oil, water termination are under ul-trasonic irradiation, form Water-In-Oil or oil-in-water emulsion liquid, reduce the viscosity of liquid, add mobility;
2, cavitation viscosity reduction effect: crude oil under strong sound field reflecting with crude oil molecular structure under the effect of thermal agitation, periodically permutation and combination produce many vesicles can be carried out, in the process that vesicle is buried in oblivion, its inner generation superhigh-temperature and-pressure, this local high energy can make the molecular scission of crude oil, namely produce cracking reaction, fundamentally change crude oil property, thus reduce viscosity of crude;
3, wax control (dirt) wax removal (dirt) effect: under strong sound field reflecting, wax (dirt) just becomes superfine particle suspension in crude oil before not condensing, and makes long-chain molecule generation cracking reaction, reduces its solidification intensity.Crude oil causes temperature to rise to hyperacoustic absorption, and on liquid solid interface, acoustic energy will change into heat energy in a large number, and the localized hyperthermia forming interface place even produces ionisation effect, thus effectively prevents wax deposition fouling.The effect of several aspect comprehensively puts on oil reservoir above, can make that the obstruction within the scope of ul-trasonic irradiation is loose, dirt particle peel off from rock stratum come off, liquid viscosity reduces, mobility increases.The recycling pressure reduction of near wellbore and the acoustic streaming effect of liquid, makes oil layer blocking thing and dirt particle flow into pit shaft smoothly with liquid, thus has dredged oily discharge orifice road, washed rock stratum hole and venturi, reaches the object removing blocking.
Ultrasonic wave de-plugging is selected the principle of well, parameter designing principle, is suitable for hole condition, de-plugging feature:
1. select the principle of well: must there be certain energy on stratum; Middle and high permeability formations is better than Middle-Low Permeability Reservoirs; In advantageous measure process, there is oil (water) well of formation damage, as the well that well-flushing pollutes, workover fluid damages stratum and acidifying, pressure break etc. cause secondary to block; According to oil reservoir and the means of production, think the well layer existing in drilling well pollution, manufacturing process and there is stratum wax deposition, organic blocking etc.; The stratum can not selected cementing difference or shake out.
2. parameter designing principle: construction parameter must be determined according to selected reservoir, and generally, the sound intensity is the bigger the better, but because being subject to device-restrictive, is generally definite value; And the optional parameters that umber of pulse, working clearance are more crucial than being, need according to result of the test optimization; Low-permeability layer requires the longer processing time; The described working clearance is than the percentage referring to periodic duty and dwell time.
3. ultrasonic wave de-plugging is suitable for hole condition: due to the restriction by ul-trasonic irradiation scope, only have the plugging removal effect of near wellbore zone to be permanent.Because of viscosity reduction, wax control wax removal, improve the effects such as permeability, only just effective in sphere of action, take out the liquid in sphere of action need be exhausted once completion opens.So Ultrasonic oil production technology is best suited for plug removal in oil and water well.Require as follows: 1. well depth is no more than 3300m; 2. sleeve pipe is intact without distortion; 3. shake out not serious, prevent the transmitter when ultrasonic wave operation from being buried by sand; 4. there is reserves underproduction because of blocking on stratum; 5. new well mud contamination blocking; 6. there is energy on stratum, and permeability is not less than 103um
2; 7. hole deviation is no more than 200m at oil reservoir place.
4. ultrasonic wave de-plugging feature: (1) is to sleeve pipe not damaged, pollution-free to oil reservoir is a kind of typical physics oil recovery technique; (2) high directivity, boundling are launched, and process selectivity is good, can process any interval random layer position; (3) controllability is good, according to series of process parameters such as power, sound field intensity, processing times under the oil reservoir situation adjust well of down-hole, can design with the most optimized parameter reaching ultrasonic wave process; (4) strong adaptability, for drilling mud pollution, workover treatment pollution, well stimulation operation is polluted and the well blocking etc. in producing of recovering the oil all has obvious effect; (5) little to the restriction of oil well condition, not by the restriction of reservoir rock character; (6) technical compatibility is strong, can combine application with other measure; (7) rock stratum owing to being crossed by ultrasonic washing, more smooth than chemical method washing, not easily adhere to dirt particle, so de-plugging period of validity is longer.
Specific embodiment: test in 2012 4 mouthfuls of wells, be to go into the well test with artificial disc cable, in May, 2014 adopts ultrasonic wave unblocking vehicle to carry out de-plugging, and test de-plugging 5 mouthfuls of wells, situation is as follows:
1, test situation in 2012
1.1, production status before test well test
Test front 4 mouthfuls of water injection wells, average upper overlying strata pressure 13.38MPa, Average pump pressure 13.78MPa, average injection pressure 12.93MPa, injection pressure crimps closely with upper overlying strata.Because water injection well injection pressure is high, the upper overlying strata pressure injection water of oil pump balance or top, substantially without adjustment leeway.Implement ultrasonic wave de-plugging totally 4 mouthfuls of water injection wells, all achieve good well stimulation effect, concrete condition is in table 1:
Table 1: Data Comparison table before and after ultrasonic wave de-plugging experiment measure
Test rear 4 mouthfuls of water injection wells, Average pump pressure 14.35MPa, average injection pressure 13.08MPa, injection pressure rising 0.15MPa, individual well daily water-injection rate on average increases 25m
3, be described below with regard to 4 mouthfuls of well courses of work below:
1.2, middle 3-2 is a bite water injection wells of more western block north, oil recovery six Kuang Zhong district nine teams, goes into operation January 1 nineteen eighty-two, sandstone thickness 66.40m, effective thickness 45.10m, Sa II 4-Portugal, main mined bed II 10.On June 19th, 2010 transfers seperated layer water injection to, and be divided into three layers (Sa II 4-Portugal I 7,1-2-Portugal of Portugal II II 6,7-8-Portugals of Portugal II II 10), each layer injection allocation is respectively 0m
3/ d, 40m
3/ d, 40m
3/ d.Can not press injection allocation because this well pushes up upper overlying strata for a long time, therefore testing and debugging has been carried out to this well, by the 40m of inclined II on May 5th, 2012
3/ d injection allocation is adjusted to 0m
3/ d, full well injection allocation is by original 80m
3/ d is adjusted downward to 40m
3/ d, after adjustment, daily water-injection rate becomes 0m
3/ d, does not still have effect after tank car well-flushing 3 tank, and do not absorb water on May 10th, 2012 closing well.In view of the situation, geology group has issued acidifying scheme, carries out acidifying to inclined III layer of position.On September 7th, 2012 throw pull out water nozzle carried out acidifying before preparation, on September 17th, 2012, labor takes acidifying team and comes this mouthful of well preparation acidifying first time, in acidization, find that the pressure on stratum is high especially, acid filling pressure 25MPa, acid solution is noted to enter at all, and acidifying team can only come back after a vain attempt.Finally adopt a kind of new acidization tool, namely first utilize ultrasonic instrument first ultrasonic to inclined III interval, then carry out acidifying.On October 4th, 2012 carries out III interval inclined in ultrasonic instrument lower going-into-well ultrasonic, and inclined III interval length 15.8m, penetrates out sandstone thickness 8.6m, penetrate out effective thickness 6.5m, full well ultrasonic wave work 13 points, 2.5 hours working times.Carry out ultrasonic wave and complete backward underground injection acid solution, half an hour, injects acid solution 16m
3acidifying terminates, the acidification reaction closing well of 24h is have passed through after acidifying, carrying out water filling after well-flushing, because this mouthful of well saliva well was that two layers carry out water filling in the past, is individual layer water filling at present, therefore after acidifying, we actively and technique team contact response situation, compress into have gone to the upper overlying strata of this well and recalculate, change upper overlying strata pressure into current 13.5MPa by original 11.9MPa, full well water amount is by original about the 12.4MPa up till now that do not absorb water, and full well can complete 40m
3/ d, after acidifying, full well always can steadily water filling up till now, completes injection allocation.Therefore, after utilizing ultrasonic instrument work, the indeterminable augmented injection problem of acidifying is solved.Its de-plugging interval water suction curves figure is as Fig. 4
1.3, high 125-302 is more a bite water injection wells of a team in the plateau sub-block of Western Area, oil recovery three Kuang Zhong district, goes into operation January 1 nineteen ninety-five, sandstone thickness 25.2m, effective thickness 14m, formation capacity 0.143um
2m, high I 1-is high by I 19 in main mined bed.December 9 calendar year 2001 transfers seperated layer water injection to, and be divided into five layers (high I 6+7 of high I 1-, high I 11-12 of high by I 9, high I 10-of high I 8-, high I 16-17 of high I 14-, high I 18-high by I 19), each layer injection allocation is respectively 20m
3/ d, 20m
3/ d, 20m
3/ d, 20m
3/ d, 20m
3/ d.On July 3rd, 2012, full well did not absorb water, and squad has carried out again changing water meter and well-flushing work, and this well does not still absorb water.On October 24th, 2012, this well carried out acidification, acidizing design altogether in two steps, the first step: pull out sky by inclined I, inclined III, inclined V, inclined II, inclined IV blocks, after being disposed on October 26th, 2012, acidifying team carries out acidifying, and acidization is very well, injects acid solution 19m
3, acidization all performs according to standard.After the reaction of this well acidizing, amplifying water filling after driving a well is zero.The morning on November 5th, 2012, carry out the ultrasonic experiment for inclined IV, inclined IV refers to that thickness is 10m by high I 14-high I 16-17, and this de-plugging experiment adopts 10m to be 10 points, and often some time of staying was at about 10-15 minute.Ultrasonic wave de-plugging in early stage process is very well, but when the 7th point, due to instrument water inlet, de-plugging experiment is forced to stop.Labor took acidifying team and carried out acidifying afternoon on November 5th, 2012, injected acid solution 16m inclined IV
3, acidification reaction 24h afterwards, labor drives a well after taking acidifying team well-flushing.Drive a well and retrodeviate IV and can complete this interval 20m
3injection allocation, after acidifying, this well always can steadily water filling up till now, and therefore utilize ultrasonic instrument first ultrasonic, it is extraordinary for then carrying out the such effect of acidifying.Inclined IV interval can complete substratum injection allocation and water injection rate is stablized, and achieves positive effect.Make that a bite is complete for a long time does not become the water injection well of injection allocation again to shine life, end on December 31st, 2012 and accumulate water filling 918m
3.This well acidizing to no effect after, after ultrasonic wave, reach Expected Results.Its de-plugging interval water suction curves figure is as Fig. 5.
1.4, high 133-skew back 24 well is a bite water injection well of four production crews in the plateau sub-block of West, oil recovery three ore deposit, so on March 3rd, 2003 goes into operation, sandstone thickness 54.4m penetrated out by full well, effective thickness 17.1m.This well geological design full well injection allocation 40m
3/ d, three grades of four sections of water fillings, every interval injection allocation 10m
3/ d, but the difference that absorbs water between this well layer is large, and poor at inclined I, II water absorbing capacity of test display on September 11st, 2012, substratum inclined I pulls out sky, injection allocation 10m
3/ d, notes 2m in fact
3/ d, substratum inclined II also pulls out sky, injection allocation 10m
3/ d, notes 1m in fact
3/ d.On November 12nd, 2012 ultrasonic wave de-plugging is carried out to this well in view of the situation, separate biased I (Sa III 1-III 10) of blocking layer, de-plugging degree of depth 992.5-1027.8m, in process, every 1m is set as a ultrasonic wave de-plugging point, each de-plugging time is 10 minutes, and ultrasonic wave de-plugging retrodeviates I injection allocation 10m
3/ d, notes 11m in fact
3/ d.Ultrasonic wave de-plugging instead of traditional acidifying well stimulation, reaches the Expected Results of well unblocking and injection increasing.
1.5, western 24-E24 is a bite water injection well returning block 303 team under the class of West two, oil recovery three ore deposit, so on October 23rd, 2011 goes into operation, sandstone thickness 21.4m penetrated out by full well, effective thickness 16m, and mined bed is P I 5 ~ P II 10.Geological design full well injection allocation 100m after the operation of this well
3/ d, and interlayer absorbs water, difference is large in one-level two sections of water fillings, plays inspection join in process in test on September 18th, 2012, and inspection joins the data display water yield entirely inclined II, injection allocation 90m
3/ d, notes 100m in fact
3/ d.So go out new departure full well injection allocation is lowered to 60m
3/ d, two fixed dead for inclined II high permeability zone throwing, inclined I water filling.Inclined II stop after, full well only has inclined I 1 layer water fillings, can only note 13m after inclined I water nozzle is pulled out sky
3/ d.Carry out ultrasonic wave de-plugging on November 9th, 2012 in view of the situation, separate blocking layer position P I 5 ~ P I 7, in process, every 1m is set as a ultrasonic wave de-plugging point, and each de-plugging time is 10 minutes, and ultrasonic wave de-plugging retrodeviates I augmented injection 7m
3/ d, on November 21st, 2012, for promoting measure effect, is coordinated by pump truck in ore deposit and is pressurized to 15MPa water filling 15m
3, pressurized water injection retrodeviates I water yield and reaches 23m
3/ d.After on November 30th, 2012, this well carried out well-flushing, inclined I water injection rate reaches 38m
3/ d, is total to augmented injection 25m in whole process
3/ d is augmented injection effect stability so far.Reached the effect of the obvious augmented injection of target zone in overall process by ultrasonic wave de-plugging, pressurized water injection and cooperation well-flushing, and measure effect is stable, remarkable.Its de-plugging interval water suction curves figure is as Fig. 6.
2, test situation in 2014
2.1, middle fourth 41-P5 ultrasonic wave de-plugging experiment effect
A bite separate water injection well of western two class in middle fourth 41-P5 Jing Shizhong district in December, 2010 operation, sandstone thickness 9.7m penetrated out by full well, effective thickness 3.3m, formation capacity 0.421um
2m, two-stage three-segment water filling.Start note on June 26th, 2013 poly-, because Injection Space is little, in sunrise in October 28 Fracturing Project in 2013, but block with large tree owing to being located in roadside greening, operation cannot be gone up always, maintain and produce.Start pressure on top surface note on November 16th, 2013 and do not enter to lower discharge capacity maintenance injection, Quan Jing joins solution 35m
3/ d, joins mother liquor 6m day
3/ d, day note solution 24m
3/ d, day note mother liquor 4m
3/ d.Lower injecting scheme twice respectively on December 15th, 2013 and on January 25th, 2014, join solution 30m day
3/ d, joins mother liquor 4m day
3/ d, but still short, day note solution 22m
3/ d, day note mother liquor 3m
3/ d.Current each layer water nozzle is empty, and on May 29th, 2014 carries out a superconduction de-plugging superconduction 18 fixed point (inclined 1:4 anchor point to inclined 1,2,3 intervals; An inclined 2:14 anchor point), inclined 3 intervals do not absorb water, and inclined 1 water absorption is few.This well and ultrasonic wave de-plugging at present contrasts before testing, and oil pressure decline 0.6MPa, full well can complete injection allocation, reaches good effect.Its de-plugging interval water suction curves figure is as Fig. 7.
2.2, the oblique 225 ultrasonic wave de-plugging experiment effects of high 1129-
Oblique 225 wells of high 1129-are that Tertiary infilling Sa Portugal, West height closes a bite separate water injection well adopted, and in October, 2011 goes into operation, and sandstone thickness 40.3m penetrated out by full well, effective thickness 6.6m, formation capacity 1.41um2m, level Four five sections of water fillings, full well day injection allocation 60m
3/ d, start water injection rate on March 14th, 2014 and be deteriorated, day notes 33m in fact
3/ d, from test achievement, inclined 4,5 sections of day injection allocation 20m
3/ d, real in not absorb water, water nozzle is empty, and on May 25th, 2014 carries out superconduction de-plugging superconduction 25 fixed point to inclined 4,5 intervals, inclined 4 interval superconduction 11 points, inclined 5 superconduction 14 points, and achieve good effect, de-plugging retrodeviates 4,5 sections of oil pressure 13.1Mpa, and day notes 21m in fact
3/ d.Its de-plugging interval water suction curves figure is as Fig. 8.
2.3, high 1135-265 ultrasonic wave de-plugging experiment effect
High 1135-265 well is that Tertiary infilling Sa Portugal, West height closes a bite separate water injection well adopted, and in March, 2012 goes into operation, and sandstone thickness 32.9m penetrated out by full well, effective thickness 6.2m, formation capacity 0.921um2m, three grades of four sections of water fillings, after overhaul in 201402 months, reprovision drives a well, full well day injection allocation 60m
3/ d, real in not absorb water, through well-flushing and test, full well water mouth is empty, and each layer does not still absorb water, and on June 17th, 2014 carries out superconduction de-plugging experiment to inclined 2 intervals, and de-plugging retrodeviates 2 sections of day injection allocation 10m
3/ d, day notes 19m in fact
3/ d, at present full well day injection allocation 60m
3/ d, day notes 37m in fact
3/ d, this well and ultrasonic wave de-plugging contrast before testing, and target zone can complete substratum injection allocation water filling, reaches good effect.Its de-plugging interval water suction curves figure is as Fig. 9.
2.4, high 324-425 ultrasonic wave de-plugging experiment effect
The encryption water injection well of plateau sublayer, east, high 324-425 Jing Shizhong district system, sandstone thickness 30.2M penetrated out by full well, effective thickness 5.7M, bottom coefficient 1.2790um2m, July 12 2012 commissioning date, day injection allocation 70m
3/ d, three grades of four sections of water fillings.Before superconduction, full well day notes 40-45m in fact
3about/d, inclined II day injection allocation 20m
3/ d, does not absorb water always.On June 6th, 2014, inclined II has carried out physics superconduction de-plugging, de-plugging degree of depth 1130-1150M, and superconduction de-plugging fixes a point 20, and 300 minutes time, obtain obvious flood effectiveness after superconduction de-plugging, the initial stage is up to 70m
3about/d, the later stage presses 20m
3/ d carries out water filling, and current water filling is stablized always.Its de-plugging interval water suction curves figure is as Figure 10.
2.5, middle J10-water 132 ultrasonic wave de-plugging experiment effect
Xi Sa Portugal of middle J10-water 132 well Shi Nan mono-district third height closes the once adjustment water injection well adopted, and day in July, 1989 goes into operation, and sandstone thickness 72.4M penetrated out by full well, effective thickness 29.7M, bottom coefficient 11.584um2m, July 1 1989 commissioning date, full well injection allocation 310m
3/ d, Pyatyi six sections of water fillings, shake out due to this well shaft bottom the various factors such as relatively more serious and water quality inferiority, tests on March 20th, 2014, inclined II (Sa II5+6-Sa III3), day injection allocation 70m
3/ d, reality does not absorb water, inclined VI (high I 1-19), day injection allocation 80m
3/ d, reality does not absorb water, and repeatedly carries out the multinomial work such as well flushing detection pulling water nozzle and does not still absorb water.On June 19th, 2014 is to inclined II (Sa II5+6-Sa III3), inclined VI (high I 1-19) has carried out ultrasonic wave de-plugging, wherein the de-plugging of II interval fixes a point 17,255 minutes time partially, and the de-plugging of inclined VI interval fixes a point 20,300 minutes time, after superconduction de-plugging, successful, inclined II, the independent water filling of VI bis-interval partially, oil pressure 8.2MPA, actual water filling 163m
3/ d.Test inclined II, partially VI on July 3rd, 2014 and all complete the interval injection allocation water yield at present.Its de-plugging interval water suction curves figure is as Figure 11.
Experiment conclusion:
1, ultrasonic wave de-plugging process is safe and reliable, efficiency is high, and technique is simple, and cost is low, non-environmental-pollution.
2, on-the-spot application result shows that Ultrasonic oil production technology is comparative maturity, effectively can remove the various blockings on stratum, can improve in-place permeability simultaneously and reduce viscosity of crude, is particularly useful for the sensible reservoir that reservoir is vulnerable to damage.
3, ultrasonic wave de-plugging well and story selecting and parameter designing are also the keys obtaining effect of increasing production.
4, ultrasonic wave de-plugging is to releasing near wellbore zone oil layer pollution, improves reservoir permeability, removes obstruction around the borehole wall, dredging oil flow channel.May be used for the Particle Blocking well that well-flushing and operation etc. cause, also may be used for the organic plugging of heavy oil wells, easily paraffin-troubled well, can combine with pump detection and workover, become conventional treatment measure.
Claims (3)
1. a Ultasonic dredging apparatus, comprises well testing truck and well head, it is characterized in that: establish mid-board (14) in the compartment of described well testing truck, and compartment is divided into anterior operational window and the winch cabin at rear portion by mid-board (14); Described winch cabin internal fixtion has generator (1), for being wound around the double-drum winch (2) of transmission cable and steel wire, and middle part is fixed with Martin Decker (7) by Martin Decker support in winch cabin, Martin Decker (7) is provided with photoelectric encoder, photoelectric encoder measures cable and the steel wire degree of depth and image data, in winch cabin, the rear on right side is fixed with cable-coiling drum (3), cable-coiling drum (3) side is connected with generator (1), and opposite side is connected with Martin Decker (7); The lower end of described transmission cable is connected with the piezoelectric ceramic electro-acoustic conversion (5) of down-hole through well head pulley (15), piezoelectric ceramic electro-acoustic conversion (5) lower end is connected with superconduction rod (6), superconduction rod (6) lower end is connected with superconduction rod weighted lever (8), is wrapped on double-drum winch (2) after Martin Decker (7) is walked around in the upper end of described transmission cable; Described operational window internal fixtion has winch console (10) and power distribution cabinet (11), and winch console (10) is provided with ultrasonic control device (9); The described tensioned meter of winch cabin internal fixtion (12) and tension signal transmission cable dish (13), tension signal cable is walked around tension signal transmission cable dish (13) and is connected with the tension force panel in the console (10) in operational window afterwards.
2. Ultasonic dredging apparatus according to claim 1, it is characterized in that: described well head is connected with lubricator (16), the top of lubricator (16) side is connected with well head pulley (15), and well head pulley (15) is provided with the anti-jump card of wire (23); Described lubricator (16) middle part is fixed with strand ring (19), the side of strand ring (19) is fixed with chain adapter (20), chain adapter (20) lower end and tube connector (21) grafting, tube connector (21) lower end is connected with the supporting seat (22) being fixed on ground.
3. utilize the de-plugging process that the Ultasonic dredging apparatus described in claim 1 is implemented, utilize the highpowerpulse electric oscillation signal that ground on-vehicle large power supersonic wave transmitter produces, pass through transmission cable, Pulse Electric oscillator signal is transferred on the piezoelectric ceramic electro-acoustic conversion of oil reservoir, convert ultrasonic wave to through electroacoustic transducer, inject in oil bearing bed, improve circulation condition and the permeability of shaft bottom, closely well oil reservoir, remove obstruction around the borehole wall, dredging oil flow channel; Concrete steps are as follows:
After well testing truck to well location, 1. carry out that well head is emptying, release install lubricator; 2. drifting, and at well head, directive wheel is installed; 3. wire hanger piezoelectric ceramic electro-acoustic conversion, imports down-hole with transmission cable, determines superconducting layer position and counts; 4. starter-generator and ultrasonic control device carry out ultrasound stimulation to each point successively according to the some position set, voltage and ultrasonic stimulation time; 5. reverse operating trips out piezoelectric ceramic electro-acoustic conversion; 6. backwash is carried out to this well; 7. with pump truck pressurization dredging interlayer waterflood path.
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| CN106246139A (en) * | 2016-09-18 | 2016-12-21 | 黑龙江省易爱蒽新材料科技发展有限公司 | Ultrasound wave frequency conversion de-plugging increases oil augmented injection device |
| CN106703772A (en) * | 2016-12-01 | 2017-05-24 | 中国神华能源股份有限公司 | Coal seam gas channel dredge method and coal seam gas channel dredge device |
| CN106761649A (en) * | 2017-02-28 | 2017-05-31 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | One kind is used for water injection well line pulse method for removing blockage |
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| CN110174342A (en) * | 2019-06-06 | 2019-08-27 | 中国石油大学(华东) | A kind of pit shaft ultrasonic wave-acidification composite blockage relieving imitative experimental appliance and method |
| CN110174342B (en) * | 2019-06-06 | 2022-02-11 | 中国石油大学(华东) | Shaft ultrasonic wave-acidification composite blockage removal simulation experiment device and method |
| CN111852418A (en) * | 2020-06-11 | 2020-10-30 | 中国石油化工股份有限公司 | High-efficient ultrasonic wave oil reservoir processing system |
| CN111852418B (en) * | 2020-06-11 | 2022-05-31 | 中国石油化工股份有限公司 | High-efficient ultrasonic wave oil reservoir processing system |
| CN111878049A (en) * | 2020-07-30 | 2020-11-03 | 核工业北京化工冶金研究院 | High-power ultrasonic blockage removal and infiltration increase device and method for in-situ leaching uranium mine |
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