Device for treatment of bottomhole formation zone of a well and method for treatment of bottomhole formation zone of well. RU patent 2487237.
 Stimulation method of formation fluid influx from well / 2485305Stimulation method of formation fluid influx from the well consists in lowering to the well of a tubing string. Counter pressure on the productive formation is decreased owing to replacing the liquid column with liquid-gas mixture (LGM) at observance of the required value of depression on the productive formation. Before the tubing string is lowered, its lower end is equipped with a remote subsurface pressure gauge and a filter. The tubing string is lowered to the well so that the filter is located opposite the formation perforation interval; after that, treatment of the bottom-hole zone of the formation is performed using a chemical method with process exposure for reaction. Then, the tubing string is lowered further so that the filter is located below the formation bottom, and into the inter-string space there lowered is a string of flexible tubes (FT) 100 m below the liquid level in the well. The liquid column is replaced in the inter-string space of the well with LGW and lowering of the FT string is continued. When lower end of the filter of the tubing string is reached, lowering of the FT string is stopped; then, stimulation of the formation fluid influx is started by gradual reduction of density of pumped LGM till the required depression on the productive formation, which is controlled as per readings of the remote subsurface pressure gauge, is achieved. After completion of stimulation of the influx from the well there removed is FT string from the inter-string space of the well, and operating equipment is lowered to the well and the well is put into operation. |
| Method for reagent clay cake removal from well / 2484244 Method for reagent clay cake removal from a well involves preliminary lowering of the tubing to lower perforation holes, formation in the zone of perforation holes of the first bath by pumping to the well via the tubing of a clay cake removing solution, its exposure, removal, further formation in the same zone of the second bath of water solution of acid with its being forced through the perforation zone to the formation and removal of the second bath by flushing; development of the well. As the clay cake removing solution, water solution of caustic soda with addition of surface active substance (SAS) is used. When the tubing is being lowered to the ell, it is equipped with a packer. Then, at open casing valve there performed is formation of the first bath by pumping of the above water solution of caustic soda via the tubing string, and the specified water solution of caustic soda is delivered to the formation by its being forced with process liquid via the tubing. Them the packer is set at the depth of not less than 50 metres above the treated formation, and forcing of water solution of caustic soda is performed with process liquid to the formation without exceeding allowable pressure on the formation; then, the well is kept for 10 hours for reaction under pressure not exceeding allowable pressure on the formation. Then, the packer is unpacked, and the working face is flushed by reverse flushing with process water by additional lowering of the tubing to the distance of 1-1.5 metres till the working face. Then, the packer is lifted so that it can be located at the depth of not less than 50 metres above the formation. Then, in the same zone there formed is the second bath by pumping of clay-acid solution with addition of Katapin KI-1 reagent on the basis of the fact that volume of clay-acid solution shall be 0.5-1 m3 per metre of the formation. The above clay-acid solution is forced with process fluid via the tubing to the formation; then, the packer is set and forcing of clay-acid solution is performed with process fluid to the formation without exceeding allowable pressure on the formation. Reaction exposure is performed during 1-2 hours. Then, well swabbing is performed via the tubing in the volume of 1.5-2 of the well volume. Then, the well injection capacity is determined at the pressure not exceeding maximum allowable pressure on the formation. When the required well injection capacity is not achieved, the above operations are repeated maximum for three times till the required well injection capacity is achieved. |
| Method for increasing oil recovery of deposit in carbonate reservoirs of fracture-pore type / 2482269 Method for increasing oil recovery of the deposit in carbonate reservoirs of fracture-pore type involves formation of a group of production wells with an injection well in the centre so that the injection well can be located in the lower part of the deposit structure in relation to production wells, oil recovery from the group of wells watered out with bottom water, forced extraction of fluid from the injection well till the response of the neighbouring wells to that action and reduction of formation pressure in the area of responding production wells. After steady reduction of formation pressure in the area of responding production wells by more than 10 %, each of them is pumped with waterproof compound that is strengthened under action of chlorhydric acid in the volume of 15-20 m3. After waterproof compound is cured, forced extraction of the fluid is stopped and acid bearing compound in the volume of 0.4-1.0 m3 per metre of oil saturated part of the formation is pumped to each well treated with waterproof compound. Responding production wells are brought into operation. |
| Method for bottom-hole zone treatment / 2477787 Method for formation bottom-hole area treatment includes mounting of oil-well tubing in the well below perforation holes, determination of technical condition of production string and character of production formation saturation in perforation zone on the base of geological-geophysical researches data, pumping and squeezing down to the formation water solution of alkali metal supersalt with holding for reaction for 10-12 h, extraction of reaction products from bottom-hole area by well blowing by inert gas or gas from well-donor through casing annulus, pumping and squeezing down to the formation hydrogen chloride, holding for reaction for 6-8 h, well development by gas from well-donor or inert gas. |
 Acidic aqueous solution containing chelating agent and use thereof / 2476475Invention relates to an acidic aqueous solution containing a chelating agent and an acid, wherein the chelating agent is glutamic N,N-diacetic acid (GLDA) or a salt thereof and wherein the amount of GLDA or the salt thereof is 20-60 wt %, based on the weight of the aqueous solution, and wherein the acid is selected from hydrochloric acid, hydrobromic acid, hydrofluoric acid, hydroiodic acid, sulphuric acid, nitric acid, phosphoric acid, formic acid, acetic acid, citric acid, lactic acid, malic acid, tartaric acid, maleic acid, boric acid, hydrogen sulphide or a mixture of two or more of these acids, and use of said solution in cleaning processes, precipitation processes or processes of removing salt deposits, at oil fields in completion and stimulation by acid treatment, fracturing and/or deposit removal. The acidic aqueous solution has pH below 3. |
 Development method of bottom-hole zone of terrigenous oil formation / 2475638According to the method of development of bottom-hole zone of terrigenous oil formation, before pumping of acid solution well is killed by solution of alkali metal hydroxide adding potassium and/or natrium chloride in quantity 0-35 wt % to obtain optimum density of composition, then well is pumped with aqueous solution containing 4-8 wt % of chlorhydric acid and 0.5-1.5 wt % of fluorhydric acid adding versene (trilon "B") in quantity 0.01-0.5 wt %, sodium dodecylsulfate in quantity 0.01-0.1 wt %, then aqueous solution of oil wetting agent NG-1 with concentration 0.01-2 wt % is pumped into formation. |
| Method of well bore zone treatment of production well / 2473800 Method of well bore zone treatment of production well involves determination of material composition of formation rock in the treated zone by means of carbon-oxygen logging (COL) immediately after the well drilling, at the following formation rock component ratio: quartz - not more than 50 wt %, clay - more than 10 wt %, and content of a layer of bitumen-resin-paraffin substances in oil of more than 30 wt %, and temperature in the well bore zone of 80-100°C; as treatment agent, Khimeko TK-3 acid composition diluted with hydrochloric acid (3%) is used in the ratio with the latter of 1:(2÷4) by weight respectively. |
 Treatment method of bottom-hole zone of horizontal or inclined well / 2471978Treatment method of bottom-hole zone of horizontal or inclined well involves well treatment with the liquid providing the absence of absorption; viscous oil or fuel oil is used as the above liquid; then, the well is flushed with gas condensate; solution of acid is pumped to productive formation; technological exposure is performed for reaction of the acid solution; hydrocarbon solvent is pumped to perform the well flushing from residues of viscous oil or fuel oil and reaction products; well is developed by means of inert gas or gas from donor well. |
| Well bore zone treatment method / 2469190 Well bore zone treatment method involves determination of formation rock composition in the treated zone by means of carbon-oxygen logging (COL) immediately after well drilling and at content of carbonates in the formation rock of more than 5 wt %, irrespective of clay and quartz content, brine water mineralisation of 200-250 g/l, iron content of 2000-5000 ppm, content of layer of bitumen-resin-paraffin substances in oil, which is equal to 30-40 wt %, and well bore zone temperature of 60-160°C; treatment agent there used is the solution of "Khimeko TK-2K" Intensifying Compound in the ratio of the latter and the solvent equalling to 1:(1-5) by weight respectively. |
| Development method of bottom-hole zone / 2469189 Bottom-hole zone treatment method involves the transportation to the working face of the device by means of a wireline, which consists of an air chamber ending with a receiving chamber with the composition located in it and generating the gas during combustion, which releases the mixture of chlorhydric and hydrofluoric acids at thermal destruction, combustion of gas-generating composition and formation of heated gaseous products at increased pressure at treatment interval, process exposure for deeper reaction of chlorhydric acid with the rock, opening of the air chamber at the specified time period due to operation of the combustible diaphragm with igniter, which is installed at its bottom, and export of contaminants from the bottom-hole zone; as the above gas-generating composition there used is the mixture containing the following, wt %: ammonium nitrite grade B 32-33, hexachloroethane 51-53, plastic fluor FP-4 15-16. |
| Stimulation method of formation fluid influx from well / 2485305 Stimulation method of formation fluid influx from the well consists in lowering to the well of a tubing string. Counter pressure on the productive formation is decreased owing to replacing the liquid column with liquid-gas mixture (LGM) at observance of the required value of depression on the productive formation. Before the tubing string is lowered, its lower end is equipped with a remote subsurface pressure gauge and a filter. The tubing string is lowered to the well so that the filter is located opposite the formation perforation interval; after that, treatment of the bottom-hole zone of the formation is performed using a chemical method with process exposure for reaction. Then, the tubing string is lowered further so that the filter is located below the formation bottom, and into the inter-string space there lowered is a string of flexible tubes (FT) 100 m below the liquid level in the well. The liquid column is replaced in the inter-string space of the well with LGW and lowering of the FT string is continued. When lower end of the filter of the tubing string is reached, lowering of the FT string is stopped; then, stimulation of the formation fluid influx is started by gradual reduction of density of pumped LGM till the required depression on the productive formation, which is controlled as per readings of the remote subsurface pressure gauge, is achieved. After completion of stimulation of the influx from the well there removed is FT string from the inter-string space of the well, and operating equipment is lowered to the well and the well is put into operation. |
 Stimulation method of formation fluid influx from well / 2485302Stimulation method of formation fluid influx from a well involves lowering to the well of a tubing string, reduction of counter pressure on a productive formation due to replacement of a fluid column in the well with liquid-gas mixture (LGM) at observance of the required value of depression on the productive formation. Prior to lowering to the well of the tubing string, the latter is equipped in an upward direction with a remote subsurface pressure gauge installed in a plugged container, a filter and a packer. The tubing string is lowered to the well so that the filter can be arranged opposite the formation bottom. The packer is put 5-10 m above the formation roof. Treatment of the bottom-hole zone of the formation is performed by pumping via the tubing string of a hydrocarbon solvent and by its forcing into the formation with process liquid. Process exposure for reaction is performed. At that, during process exposure for 1.5-2 hours, there unpacked is the packer, and in 3-4 cycles in every 0.5 hour, process liquid in the volume of 0.5-0.8 m3 is pumped in turn to the tubing string and to the inter-string space of the well. The packer is put again upon completion of process exposure. Into inner space of the tubing string there lowered is a string of flexible tubes (FT) so that its lower end is on the liquid level in the well. After that, the space on the wellhead is sealed between the tubing string and the string of flexible tubes. Then, with stops in every 200-300 m there lowered is a string of flexible tubes into the tubing string until lower end of the string of flexible tubes reaches the filter. Replacement of well fluid with LGM is performed in inner space of the tubing string during stops and during lowering process of FT in equal LGM volumes. |
 Method for subsequent development of multisite well / 2483208Method involves perforation of two productive intervals, lowering to the well of a layout consisting (in an upward direction) of a setting device, a shank, a packer located below upper productive interval, a pipe string with a drain valve on the level of upper productive interval, and on the head with a tee-piece with a cutoff branch and a cutoff branch pipe above the tee-piece, packer setting, swabbing in the pipe string of lower productive formation, build-up of a recovery curve of a level for lower productive formation, evaluation of productivity of lower productive formation; filling of the layout with water after swabbing of lower productive formation through the tap and the tee-piece; waiting till water goes downwards and air upwards; air bleeding through a branch pipe, repetition of operations till the layout is filled with water; lowering to the pipe string and arrangement in the setting device of a cutoff device' creation of pressure in the pipe string and opening of the drain valve' swabbing in the pipe string of upper productive formation; build-up of a recovery curve of the level for upper productive formation; evaluation of productivity of upper productive formation, lifting of the layout out if the well, lowering of a downhole pumping equipment and operation of the well. |
 Recovering method of working condition of gas-oil production well with horizontal and/or subhorizontal end during operation, and technological complex for method's implementation / 2482268Recovering method of the working condition of gas-oil production well involves three stages. At the first stage, geophysical measurements of the well parameters are performed, as per which the profile of influx of the investigated section of the well is determined and non-working intervals are identified. At the second stage, flushing of technogenic fluids of the well sections with non-working intervals is performed. At the third stage, check measurements of the well geophysical parameters are performed so that quantitative and qualitative yield characteristics of non-working intervals are determined. Technological complex used for the method's implementation includes two units with a flexible tubing string, one of which includes a geophysical cable for connection and transportation to the well of a geophysical instrument, and the second unit with the flexible tubing string serves for flushing of bottom-hole part of the well. The second unit with the flexible tubing string has the possibility of being connected to the hydraulic diagram of the first unit with the flexible tubing string and to the well flushing equipment. |
| Method of well development / 2480580 In process of well development a pipe string with a packer and a valve is placed in a well, and the valve is capable of opening in the pipe string, the packer is installed, swabbing is carried out along the pipe string until inflow of reservoir products appears, the liquid level in the string is measured with a swab, the valve is opened, the packer is stripped, the pipe string is lifted, and the underground equipment is lowered. The bottom of the pipe string is placed below the perforation interval by 0.8-1.2 m, the annular space is filled with a killing fluid with density and in the volume sufficient to pull pressure at a bottomhole, which is more than the bed pressure, actions are organised, which eliminate overflow of bed fluids from under the packer into the annular space. |
 Treatment method of productive formation, and downhole equipment for its implementation / 2478778Treatment method of productive formation consists in a cyclically alternating operation of repression on the formation with pumping of process fluids to the formation and depression on the formation so that an influx is caused. Wave action with elastic vibrations on treated medium is performed with a hydrodynamic generator installed in the well opposite productive interval. Values and/or creation velocities of repression and depression are adjusted in cycles. Regular wave action controlled as per amplitude-frequency parameters is performed. Monitoring of running of filtration processes, decolmatation and fracture formation in formation medium is performed, on the basis of which control parameters, wave action parameters in further cycles of repression and depression and divider of those cycles as to time are determined and assigned in a feedback mode. Values and/or velocities of creation of repression and depression in cycles are controlled with their subsequent increase. Their initial minimum values are determined and assigned depending on filtration capacitance parameters of formation medium, and at the same time, hydraulic impact pressure pulses are created from time to time in the well fluid. |
 Acoustic downhole emitter / 2476663Device includes an electromechanical vibrator, an electric generator connected to the vibrator inlet and having the possibility of changing the phasing of exciting signals of the vibrator. Vibrator consists of two identical symmetrical parts in the form of rectangular metal plates, on the opposite parts of which piezoelectric plates having the opposite polarisation relative to metal plates are rigidly fixed. Outer sides of piezoelectric plates are covered all around with a sealing layer of waterproof material and electrically connected to each other and to one of the generator outputs. Metal plates are connected to the other generator output. Vibrator fastener is made in the form of two identical symmetrical parts relative to the well axis, which form a rigid clamp enclosing the cylindrical surface of elements of the well mouth part. |
 Method of hydrodynamic investigations of oil wells equipped with electric-centrifugal pumps with converter of current frequency / 2475640Invention refers to methods of hydrodynamic investigations of oil wells equipped with submersible electric-centrifugal pumps and control stations with frequency converters, and it may be used for choice of optimum operating mode of well. Method of hydrodynamic investigations of oil well involves connection of electric-centrifugal pump to production electric network through converter of frequency of current supplied to electric-centrifugal pump. Well flow rate is measured as per oil during operation in mode of rated power frequency. Depression is created by means of increase in electric-centrifugal pump efficiency due to increase in current frequency to the value providing steady mode of well operation under which well flow rate as per fluid is maximum. Well flow rate is measured as per fluid, also water content of its products is measured during operation in mode of rated frequency. When maximum value is reached current frequency is reduced to the value providing steady mode of well operation under which well flow rate as per fluid is minimum. Increase and reduction of current frequency is performed during continuous operation of electric-centrifugal pump with repeated measurement of pressure and temperature at pump suction, well flow rate and water content on wellhead. As per the measurements results curve is built for pressure recovery during transition of well operation mode at which well flow rate as per fluid is maximum to operation mode at which well flow rate as per fluid is minimum. Then hydro- and piezo-conductivity, permeability, supply contour radius, skin factor are determined. Also optimum frequency of current supplied to electric-centrifugal pump, under which reduction of water content and increase in flow rate as per oil relative to analogous values during well operation in mode of rated frequency is provided, is determined. |
 Method and system for interpretation of swabbing tests using non-linear regression / 2474682Method for increasing the extraction in the reservoir bed involves the swabbing tests in the pipe at some depth. The pipe is arranged in the well shaft. Some part of the well shaft is locate inside the reservoir bed. From time to time, pressure is measured in lower part of the pipe using a pressure gauge in order to obtain a variety of pressure measurements during the swabbing test. Pressure gauge is attached to inner wall of lower pipe part. Variety of velocities of the fluid flowing from reservoir bed is determined through perforations made in the well shaft to the pipe using the flow velocity equation and variety of pressure measurements. |
| Method for intensifying oil extraction from well / 2473797 Method for intensifying the oil well from a well involves determination of well flow rate reduction dynamics, well shutdown and filling with working fluid on water basis. Additional holes are made opposite productive formation in perforated production string; acoustical action is performed on productive formation by generating elastic wave field of the ultrasonic frequency range in the well at perforation interval. After acoustical action is performed at the tubing lowered to the well and equipped with bottomhole means for working fluid flow energy conversion, reversing hydrodynamic action on productive formation is performed in addition. First, under conditions of extremely high flow rates of working fluid owing to creating instantaneous depression in the well opposite productive formation. Then, without any process pause, under conditions of oscillating flow of working fluid at perforation interval with emission of low-frequency oscillations to its flow. Oscillating flow of working fluid is performed in portions so that repression and depression per productive formation, which are adjustable as to the value, are alternated. |
 Detonator for well equipment / 2340764Invention relates to oil, gas producing and mining industries and can be employed at perforating works in wells. The detonator for well equipment incorporates case with an axial step channel having in its upper portion a diameter bigger, than in its lower portion, piston fixed in the axial channel with a bigger diameter in its end upper position, shutter of the axial channel positioned in the zone of transition of the axial channel from one diameter to another and forming with the piston a pressure tight chamber filled with gas or gas mixture in its sub-piston space, charge of blasting explosive (BE) partially filling the lower portion of the channel under the shutter and device for unfixing of the piston. At that the detonator is designed to impulse compression in the sub-piston space of gas or gas mixture due to the said impulse compression by 200-500 times in comparison with their initial pressure, then there follows heating of gas or gas mixture to temperature 20-40% above the temperature of charge of BE ignition, shear of the shutter in one of the lower positions of the piston, acceleration of the shear fragment of the shutter to a speed facilitating generation of a shock wave in the charge of BE able to cause its detonation and perform the detonation proper of the charge of BE by means of combination with the wave action to the charge of BE with a heat effect of the heated fragment of the shutter, heated gas or mixture of gases and mechanical effect with the said fragment of the shutter. |
FIELD: oil and gas industry.
SUBSTANCE: device for treatment of bottomwhole formation zone contains an air chamber with atmosphere pressure and length of 20-50 m connected to the first additional perforated chamber with seal layer, solid heat generating compound A with flame igniter, combustible high-strength compound B and breakable calibrated membrane located inside; the first added perforated chamber by means of a coupling with holes is connected to the second added inlet chamber with combustible high-strength compound C, igniter and breakable calibrated membrane located inside; the second additional perforated chamber by means of a coupling with added air chamber with length of 1.5-3 m connected by means of a coupling and metal adapter with to inlet chamber that is made of elastic plastic material with seal layer, solid acid generating compound D with igniter located inside; in the metal adapter there are drilled holes; compound A generated heat and gas of the following components by wt %: ammonium nitrate 35; sodium bichromate 2; barium nitrate 15; aluminium ASD-1 1.5; iron-aluminium thermite 31; epoxide compound (mixture of ED-20 tar, EDOS plasticiser and AF-2M hardener) 15.5; compound B is made of the following components by wt %: ammonium nitrate 30-40, calcium carbonate 5-10, the above epoxide compound 50-65; inside the added inlet chamber there is a layer of glass sealant and solid gas generating compound E made of the following compounds by wt %: ammonium nitrate 70, sodium bichromate 1, the above epoxide compound 29; compound C is made of the same composition as compound B; compound D is made as thermal-gas-chemical solid fuel with a layer of glass sealant and a layer of epoxide compound on top of it; the above fuel consists of the following components by wt %: ammonium nitrate 12-16, lithium fluoride 1-3, barium nitrate 5-8, aluminium ASD-1 0.7-0.8, iron-aluminium thermite 14-16, hexachlorane 20-30, polytetrafluoroethylene 20-30, the above epoxide compound 5-10. The method for treatment of bottomhole zone (BHZ) includes delivery of the above device by a wireline, combustion of compound D and formation of maximum quantity of chemical agents, holding for the purpose of reaction of acids produced during combustion with BHZ formation, running with installation of the coupling with holes at the level of treated stratum, opening of the chamber with length of 20-50 m, actuation of breakable calibrated membrane in result of layer-by-layer combustion of compounds A and B with implosion treatment of BHZ, removal of impurities from bottomhole stratum; during holding thermal-gas-chemical impact acts on the stratum for 30 minutes ad pressure can be corrected due to availability of holes in the metal adapter at fixed position of the above fuel inside the inlet chamber due to the above layers of sealant and compound with formation of gases heated up to high temperatures at high pressure within treatment range; opening of the chamber with length of 1.5-3 m is carried out by sequential actuation of the igniter, compounds E and C and breakable calibrated membrane located in the second added inlet chamber; after hydraulic shock there's another holding of the process for 30 minutes; when the chamber with length of 20-50 m is opened combustion of compound A takes place with formation of gases heated up to high temperature at high pressure within treatment range.
EFFECT: increase of treatment efficiency for bottomhole formation.
2 cl, 2 ex, 1 dwg
Field : oil producing industry and can be used to enhance the processing of the well bottom zone.
Known device for the treatment of well bottom-hole zone and how to handle the well bottom zone by the patent RF №2330951, IPC 21 43/25, 21 43/27, 10.08.2008.
Device for the treatment of well bottom-hole zone contains air chamber with atmospheric pressure, made a length of 20-50 meters, connected with the help of coupling with a reception perforated metal camera with hosted it hard gassing agent composition, consisting of two parts, where the first part, turned toward the air chamber, made of combustible high-strength songs, and the second part of the composition, the indicated reception the camera is equipped on its upper side of the destructible diaphragm and is connected by a coupling made with holes, additional receiving cell, in which the posted high-strength composition, ignitor and polymer aperture, and additional reception chamber is connected to the coupling with additional air chamber, made in length of 1,5-2,5 meters.
Way of processing of the well bottom zone includes shipping in the face at cable-rope to the above devices, the installation of its coupling with holes opposite of the processed layer, disclosure air chamber length 20-50 meters by triggering aperture of layer-by-layer combustion of solid gassing agent composition with the formation of gases, heated to high temperatures, high pressure in the interval of treatment, discharge of pollutants of bottomhole formation zone, the technological holding, providing the warming of the breed, the disclosure of additional air chamber length of 1.5-2.5 meters by successive triggering of placed additional receiving chamber of the igniter, combustible high-strength songs and destructible aperture with the implementation of water hammer and firing the igniter perform from electric impulse.
The disadvantage of this method and device is the low efficiency of processing of bottom-hole formation zone because of the small selection of chemical agents and small penetration heated fluid (acid) in the treated formation and inadequate removal of pollution of bottom-hole formation zone.
Closest to the invention is essentially a technical device for the treatment of well bottom-hole zone and how to handle the well bottom zone by the patent RF №2329374, IPC 21 43/27, 21 43/25, 20.07.2008.
Device for the treatment of well bottom-hole zone contains air chamber length of 20-50 meters, connected with the help of coupling with the first additional receiving cell, where high-strength composition with igniter and destructible aperture, clutch with holes, air chamber in length of 1,5-3 m, connected by using the clutch and metal adapter with receiving cell of material, inside of which are ply, solid composition with the igniter.
The composition is placed in contact with hosted the receiving chamber combustible high-strength composition in contact with destructible diaphragm.
Way of processing of the well bottom zone includes shipping in the face at cable-rope specified the above device, combustion and formation of a maximum quantity of chemical agents by increased pressure in the interval of treatment disclosure air chamber by triggering aperture from combustion CWUU implementation of the hammer, the technological holding deep response of the spun-off during combustion of KGC hydrofluoric acid and hydrochloric acids with the breed, the descent of the device specified with the placement of the coupling with the holes on the level of the processed layer and implementation of the disclosure of additional air chamber by successive triggering placed in additional inlet chamber CWUU igniter and destructible diaphragm with operation of the ignition of the electric pulse.
The disadvantage of this device and method is the low efficiency of processing of bottom-hole formation zone because of the small selection chemical agents, small penetration heated fluid (acid) in the treated formation, as well as small-time interaction of chemicals with the breed, as followed by acidic influence we should hydraulic shock.
Task, the solution of which is aimed claimed the invention is to increase the efficiency of the technology of processing of bottom-hole formation zone by deeper penetration of the working environment (gaseous chemical agents, hydrofluoric and hydrochloric acid and other) in the reservoir and intensive dissolution of rocks at complete removal of dirt from the bottom-hole formation zone.
The technical result is achieved by a device for processing the well bottom zone containing air chamber with atmospheric pressure, made a length of 20-50 meters and is connected by using the clutch to the first additional admissions perforated camera inside hosting ply, solid composition with igniter, high-strength composition and destructible aperture, the first additional reception perforated camera using the clutch with the holes is connected with the second additional receiving cell, which is placed inside high-strength composition, ignitor and destructible aperture, the second additional reception chamber is connected to the coupling with additional air chamber, made in length of 1,5-3 meters and is connected, in turn, assistance clutch and metal adapter with receiving cell made of material, which is placed inside ply, solid composition with igniter, according to the claimed invention in a metal adapter holes the specified hard the composition is made in the form of of mixture composition, wt.%:
Ammonium nitrate
35Sodium bichromate
2Nitric barium
15Aluminium ASD-1
1,5Thermo
31Epoxy compound (a mixture of resin
15,5ED-20, plasticizer and BUILDERS
hardener AF 2M),
and high-strength composition situated inside the first additional admissions perforated camera is made of the mixture composition, wt.%:
Ammonium nitrate
30...40Calcium carbonate
5...10Epoxy compound (a mixture of resin
50...65ED-20, plasticizer BUILDERS and
hardener AF 2M),
inside the second additional reception chamber, there are additional layer sealant and solid composition, made from a mixture of composition,% Mas.:
Ammonium nitrate
70Sodium bichromate
1Epoxy compound (a mixture of resin
29ED-20, plasticizer and BUILDERS
hardener AF 2M),
and high-strength composition situated inside the second additional chamber, is made of the mixture of the same composition, and high-strength composition is placed inside the first additional admissions perforated camera, hard the composition is made in the form of solid fuel, the inside of the chamber of material over the solid fuel, there are additional layer sealant layer and epoxide compound, and solid fuel is made of mixture composition, wt.%:
Ammonium nitrate
12...16Lithium fluoride
1...3Nitric barium
5...8Aluminium ASD-1
0,7 0,8...
Thermo
14...16 20...30Polytetrafluoroethylene
20...30Epoxy compound (a mixture of resin
5...10.ED-20, plasticizer and BUILDERS
hardener AF-2M).
Brief description of the drawing, which shows the proposed device for processing the well bottom zone.
On the drawing the figures indicate:
1 - cable head,
2 - aerial camera with a length of 20 to 50 m,
3 - coupling,
4 - destructible aperture
5 - latch
6 - high-strength composition,
7 - solid composition,
8 - perforation holes,
9 - the first reception perforated Luggage,
10 - wire supply of electric pulse,
11 - igniter,
12 - ply,
13 - coupling holes,
14 - the second additional reception of Luggage,
15 - layer sealant,
16 - igniter,
17 - solid composition,
18 - high-strength composition,
19 - destructible aperture
20 - coupling,
21 - additional air chamber in length of 1,5-3 m,
22 - coupling,
23 - metal adapter with holes
24 - layer epoxy compound,
25 - layer sealant,
26 - intake chamber of material
27 - solid fuel
28 - igniter,
29 - ply.
Processing device well bottom-hole zone contains connected to the cable head 1 air chamber 2, executed in length 20-50 meters and is connected with the help of coupling 3 with the first additional admissions perforated metal camera 9, which is placed inside ply 12, solid composition with igniter 11 and high-strength track 6 with destructible diaphragm 4, reinforced clamps 5.
The first reception Luggage 9 using the clutch 13 holes is connected with the second additional receiving cell 14, which is placed inside high-strength composition 18, ignitor 16 and destructible aperture 19.
The second chamber is connected to the reception coupling 20 with additional air chamber 21, made a length of 1.5-3 meters and is connected, in turn, with the help of coupling 22 and metal adapter 23 with the receiving cell 26, made of material, which is placed inside ply 29, solid composition with igniter 28.
The proposed device for processing the well bottom zone has the following differences from analog prototype:
- metal-adapter 23 holes
- solid composition is placed inside the first additional reception perforated camera 9, executed in the form of solid compositions 7, solid track 7 is made of the mixture composition, wt.%:
Ammonium nitrate
35Sodium bichromate
2Nitric barium
15Aluminium ASD-1
1,5Thermo
31Epoxy compound (a mixture of resin
15,5ED-20, plasticizer and BUILDERS
hardener AF 2M),
- high strength for track 6, also placed inside the first additional admissions perforated camera 9, is made of the mixture composition, wt.%:
Ammonium nitrate
30...40Calcium carbonate
5...10Epoxy compound (a mixture of resin
50...65ED-20, plasticizer and BUILDERS
hardener AF 2M),
- inside the second additional chamber 14, there are additional layer sealant 15 and solid composition 17, made of a mixture of composition,% Mas.:
Ammonium nitrate
70Sodium bichromate
1Epoxy compound (a mixture of resin
29ED-20, plasticizer and BUILDERS
hardener AF 2M),
- high-strength composition 18, placed inside the second additional chamber 14, is made of the mixture of the same composition, and high-strength track 6 is placed inside the first additional chamber 9, wt.%:
Ammonium nitrate
30...40Calcium carbonate
5...10Epoxy compound (a mixture of resin
50...65ED-20, plasticizer and BUILDERS
hardener AF 2M),
- solid compositions, performed in as solid fuels 27,
- solid fuels 27 is made of mixture composition, wt.%:
Ammonium nitrate
12...16Lithium fluoride
1...3Nitric barium
5...8Aluminium ASD-1
0,7 0,8...
Thermo
14...16 20...30Polytetrafluoroethylene
20...30Epoxy compound (a mixture of resin
5...10.ED-20, plasticizer and BUILDERS
hardener AF 2M),
- inside the chamber 26 of material over the solid fuels 27, there are additional layer sealant 25 and layer epoxide compound 24.
Thus, the device contains connected to the cable head 1 air chamber 2 length of 20-50 m, connected with the help of coupling 3 with the first additional receiving cell 9 of metal material, the walls of which are made perforation holes 8 and inside hosting ply 12, solid track 7 from the igniter 11 and high-strength track 6 with destructible diaphragm 4, reinforced clamps 5, the first additional reception Luggage 9 using the clutch 13 holes connected with the second additional receiving cell 14, which is placed inside the layer sealant 15, solid composition 17 with igniter 16, high-strength composition 18 with destructible diaphragm 19, additional air chamber 21 length of 1.5-3 m, connected with the help of coupling with 20 of the second additional receiving cell 14, and with the help of coupling 22 and metal adapter 23, in which holes with receiving cell 26 of material, inside of which are ply 29, solid fuel with 27 igniter 28, layer sealant 25 and layer epoxide compound 24. Igniters 11, 16, and 28 are connected with wire 10, necessary for the supply of electric impulse.
Way of processing of the well bottom zone includes shipping in the face at cable-rope specified device combustion solid fuels 27 ( composition) and the formation of a maximum quantity of chemical agents, technological holding for deep response acids released by the combustion of solid fuels 27 ( composition), with the breed well bottom-hole zone, during which carry impact on the formation of lasting 30 minutes, with the possibility of pressure equalization through holes made in metal adapter 27, at a fixed position solid fuels 27 inside the chamber 26 through layer sealant 25 and layer epoxide compound 24, placed on top of solid fuels 27, with the formation of gases, heated to high temperatures, high pressure in the interval of treatment.
Then carry out a descent to the specified device and the installation of his clutches 13 with the holes on the level of the processed layer.
Further carry out the disclosure of the air chamber 21 length of 1.5-3 meters by successive triggering placed in the second additional inlet chamber 14 igniter 16, solid gassing agent compositions 17, combustible high-strength songs 18 and destructible aperture 19 implementation of the hydraulic impact, and after the implementation of the water hammer carry out additional technological holding lasting 30 minutes.
Then carry out the disclosure of the air chamber length 20-50 meters by successive triggering placed in the first additional inlet chamber 9 igniter 11, combustion compositions 7 with the formation of gases, heated to high temperatures, high pressure in the processing interval, combustible high-strength songs 6 and actuation of the destructible diaphragm 4 implementation processing the well bottom zone.
Following is the removal of dirt from the bottom-hole formation zone.
The device is simulated and designed at the application software «Device Developer». Bench tests have confirmed working capacity of the device.
The device works as follows.
First ship in the face at cable-wire devices for processing the well bottom-hole zone.
Set the receiving chamber of the 26 in the range of the processed layer. Wells through the cable serves electric impulse 28 solid fuel 27. After the ignition and combustion fuel 27 allocated gaseous chemically active agents, which eventually form a working environment (mixture consisting of: gaseous chemical agents, hydrofluoric acid and hydrochloric acids and other). The layers burns and housing the reception chamber 26.
Carry out the technological holding for deep response acids released by the combustion of solid fuels 27 ( composition), with the breed well bottom-hole zone, during which carry impact on the formation of a duration of 30 minutes, which allows you to chemical agents, acids and better penetrate into the breed.
Holes made in metal adapter 23, required for pressure compensation.
Layer sealant 25 suffused with the top layer of epoxide compound 24, is necessary for fixing hard solid fuels 27 in a stable position, and to avoid displacement of the composition inside the chamber 26.
After submission of the electric pulse to the igniter 16, ignition of the solid gassing agent compositions 17. At the end of the combustion gassing agent compositions 17 ignition of a combustible high-strength songs 18 and triggered aperture 19 (calculated on the response pressure of 10 MPa), which leads to the disclosure of the air chamber 21 length of 1.5-3 M. This range (1.5-3 m) length of the air camera 21 is optimal to ensure value for the maximum increase of pressure P, equal 160-180 MPa, working environment due to hydraulic shock if the diameter of the air chamber 21, equal to 0.089 m, pressure membrane destruction 30 MPa and density of working agent 1000 kg/m 3 (according to Popov A.A. implosion in the processes of oil production. - M: Nedra. - 1996, .94 and bench testing device). Next, through the hydraulic shock occurs deeper penetration of chemical agents in the reservoir, and also occurs the increase of micro-cracks in the pores of the treated area.
After the implementation of the water hammer carry out additional technological holding lasting 30 minutes.
Further wells are fed through the cable electrical impulse to the igniter 11, which leads to inflammation and layer-by-layer combustion compositions 7 with the formation of gases, heated to high temperatures, high pressure in the interval of treatment. Emitted gases out of the bottom-hole zone through the perforations 8. Next ignition of a combustible high-strength songs 6. Complete combustion of this composition leads to the destruction of diaphragm 4 (calculated on the response pressure of 10 MPa) and firing of the air chamber 2, the length of 20-50 m The range 20-50 m) length of the aerial camera 2 is optimal to ensure maximum reduction of pressure P, 7-10 MPa, in the slaughter at a diameter of an air chamber 2, equal 0,076 m, pressure membrane destruction 30 MPa and density of working agent 1000 kg/m 3 (according to Popov, A.A. implosion in the processes of oil production, " M: Nedra. - 1996, .94 and bench testing device).
After the disclosure of the air chamber 2 by drastically reducing the pressure at the bottom hole in it directs the flow of downhole fluid pollution and elements, thus providing a more complete treatment of the well bottom zone. The device is extracted from wells.
Examples of concrete implementation.
Example 1.
Processing of bottom-hole zone of the oil wells to a depth of 1,900 metres from the oil reservoir in collector.
First ship in the face at cable-wire devices for processing the well bottom-hole zone.
Composition solid fuels 27, located in the inlet chamber 26 and allowing impact on the formation, the following,% Mas.:
Ammonium nitrate
15Lithium fluoride
2Nitric barium
7Aluminium ASD-1
0,8Thermo
15,2 26Polytetrafluoroethylene
26Epoxy compound (a mixture of resin
8ED-20, plasticizer and BUILDERS
hardener AF-2M).
Composition of solid gassing agent compositions 17, located on the second additional inlet chamber 14 and enabling the hydraulic impact, the following, wt.%:
Ammonium nitrate
70Sodium bichromate
1Epoxy compound (a mixture of resin
29ED-20, plasticizer and BUILDERS
hardener AF-2M)
Composition of solid compositions 7, located in the first additional inlet chamber 9 and enabling processing, next, wt.%:
Ammonium nitrate
35Sodium bichromate
2Nitric barium
15Aluminium ASD-1
1,5Thermo
31Epoxy compound (a mixture of resin
15,5ED-20, plasticizer and BUILDERS
hardener AF-2M).
The composition of combustible high-strength songs 18 and 6, located respectively in the second additional inlet chamber 14 and the first additional inlet chamber 6 wt.%:
Ammonium nitrate
35Calcium carbonate
5Epoxy compound (a mixture of resin
60ED-20, plasticizer and BUILDERS
hardener AF-2M).
Reception Luggage 26 containing solid fuels 27, has a diameter of 0,092 m and a length of 1 m Air chamber 21, carrying out hydraulic shock, has a diameter of 0,076 m and a length of 1.5 m Air chamber 2, carrying out processing, has a diameter of 0,076 m and a length of 20 m All cameras have devices for determination of pressure.
When electric pulse ignited solid fuels 27, step-by-step combustion of which is heated gases, including hydrofluoric and hydrochloric acid, create pressure, crushing the working environment in the pores and cracks in the bottom hole environment.
Further carry out the technological holding for 30 minutes.
After technological excerpts device is lowered so that the coupling 13 holes proved to be the opposite of the treated area of the reservoir.
At the end of the technological shutter trigger the ignition of the solid compositions 7. Combustion gassing agent compositions 7 leads to the destruction of aperture at a pressure of 4 MPa, 30 disclosing air chamber 2 length of 20 m and discharge up to 9 MPa, which is also recorded device. Reduction of pressure in the mine leads to the rehabilitation of the discharge of pollutants from bottom-hole formation zone.
Example 2.
Processing of bottom-hole zone of the oil wells to a depth of 1,900 metres from the oil reservoir in collector.
First ship in the face at cable-wire devices for processing the well bottom-hole zone.
Reception Luggage 26 containing solid fuels 27, has a diameter of 0,092 m and a length of 1 m
Air chamber 21, carrying out hydraulic shock, has a diameter of 0,076 m and a length of 3 m Air chamber 2, carrying out processing, has a diameter of 0,076 m and a length of 50 m All cameras have devices for determination of pressure.
Composition solid fuels 27, located in the inlet chamber 26 and allowing impact on the formation, the following,% Mas.:
Ammonium nitrate
14Lithium fluoride
3Nitric barium
5Aluminium ASD-1
0,7Thermo
14 26Polytetrafluoroethylene
29Epoxy compound (a mixture of resin
8,3ED-20, plasticizer and BUILDERS
hardener AF-2M)
Composition of solid gassing agent compositions 17, located on the second additional inlet chamber 14 and enabling the hydraulic impact, the following,% Mas.:
Ammonium nitrate
70Sodium bichromate
1Epoxy compound (a mixture of resin
29ED-20, plasticizer and BUILDERS
hardener AF-2M)
Composition of solid compositions 7, located in the first additional inlet chamber 9 and enabling processing, next, wt.%:
Ammonium nitrate
35Sodium bichromate
2Nitric barium
15Aluminium ASD-1
1,5Thermo
31Epoxy compound (a mixture of resin
15,5ED-20, plasticizer and BUILDERS
hardener AF-2M)
The composition of combustible high-strength songs 18 and 6, located respectively in the second additional inlet chamber 14 and the first additional inlet chamber 6 wt.%:
Ammonium nitrate
40Calcium carbonate
10Epoxy compound (a mixture of resin
50ED-20, plasticizer and BUILDERS
hardener AF-2M).
In this example, the maximum water hammer pressure is 158 MPa, and the activation of an air chamber 2 provides pressure to 58 MPa. After the disclosure of the air chamber 2 by drastically reducing the pressure at the bottom hole in it directs the flow of downhole fluid pollution and elements, thus providing a more complete treatment of the well bottom zone. The device is extracted from wells.
As a result of the permeability of the bottomhole formation zone folded from terrigenous rocks, increases and the flow rate increases on 50%.
When operating oil wells there is a gradual decrease in productivity due to sedimentation of the bottomhole zone. The proposed device and method allows solving the problem of effective bottomhole cleaning from clogging elements and thereby increasing well productivity.
1. Device for the treatment of well bottom-hole zone containing air chamber with atmospheric pressure, done 20-50 m in length and is connected by using the clutch to the first additional admissions perforated camera, which is placed inside ply, solid composition with igniter, high-strength composition and destructible aperture, the first additional reception perforated camera using the clutch with the holes is connected with the second additional receiving cell, which is placed inside the high-strength composition, ignitor and destructible aperture, the second additional reception chamber is connected to the coupling with additional air chamber, made in length of 1,5-3 m and connected, in turn, by using the clutch and an adapter with metal receiving cell made of material, which is placed inside ply, solid composition with igniter, wherein the metal adapter holes specified solid compositions, performed in as of mixture composition, wt.%:
Ammonium nitrate
35Sodium bichromate
2Nitric barium
15Aluminium ASD-1
15Thermo
31Epoxy compound (a mixture of resin ED-20,
plasticizer BUILDERS and hardener AF-2M)
15,5,and high strength composition situated inside the first additional admissions perforated camera is made of the mixture composition, wt.%:
Ammonium nitrate
30-40Calcium carbonate
5-10Epoxy compound (a mixture of resin ED-20,
plasticizer BUILDERS and hardener AF-2M)
50-65,within the second additional reception chamber, there are additional layer sealant and solid composition, made from a mixture of composition,% Mas.:
Ammonium nitrate
70Sodium bichromate
1Epoxy compound (a mixture of resin ED-20,
plasticizer BUILDERS and hardener AF-2M)
29,and high-strength composition situated inside the second additional chamber, is made of the mixture of the same composition, and high-strength composition is placed inside the first additional admissions perforated camera, hard composition made in the form of solid fuel, the inside of the chamber of material over solid fuel, there are additional layer sealant layer and epoxide compound, and is made of solid fuel the mixture composition, wt.%:
Ammonium nitrate
12-16Lithium fluoride
1-3Nitric barium
5-8Aluminium ASD-1
0,7-0,8Thermo
14-16 20-30Polytetrafluoroethylene
20-30Epoxy compound (a mixture of resin ED-20,
plasticizer BUILDERS and hardener AF-2M)
5-102. Way of processing of the well bottom zone, which includes shipping in the face at cable-rope device according to claim 1, combustion composition and formation of a maximum quantity of chemical agents, technological holding for deep response acids released by the combustion of composition, with the breed well bottom-hole zone, the descent of the specified devices and installation of its coupling with the holes on the level of the processed layer, disclosure air chamber length of 1.5-3 m by triggering the destructible diaphragm from the combustion of combustible high-strength composition with the implementation of the hammer, the disclosure of air chamber length of 20-50 m, by triggering the destructible aperture of layer-by-layer combustion composition and combustible high-strength songs, with the implementation of processing of bottom-hole zone well, and further discharge of pollutants from bottom-hole formation zone, and during technological endurance exercise impact on the formation of a duration of 30 min with the opportunity to equalize pressure due to holes formed in metal adapter, with a fixed position solid fuel inside the chamber through layer sealant layer and epoxide compound placed on top of solid fuel, with the formation of gases, heated to high temperatures, high pressure in the interval of treatment and disclosure of air chamber length of 1.5-3 m is carried out by consecutive actuation placed in the second additional receiving chamber of the igniter, solid gassing agent song, combustible high-strength songs and destructible aperture, and, after the implementation of the hydraulic hammer, carry out additional technological holding a duration of 30 min, and the disclosure of air chamber length of 20-50 m, exercise combustion composition with the formation of gases, heated to high temperatures, high pressure in the processing interval.