The processing method of wellbore zone

 

The invention relates to mining and can be used for development and rehabilitation of well production wells, reduced due to clogging of wellbore zone of asphalt formations and solids. Applying the processing method of wellbore zone by creating a periodic pressure pulses in the near-wellbore area of the formation in the form of a damped standing wave above the valve bore is mounted a high pressure cylinder with a piston. Above the high-pressure cylinder coaxially have the low pressure cylinder with a piston connected to the piston of the high pressure cylinder. The cylinders form a hydraulic multiplier. Periodic pressure pulses in the near-wellbore area of the formation of a damped standing wave formed by a blow on the surface of the borehole fluid discharge of compressed gas through hydraulic multiplier. This serves the compressed gas in the low pressure cylinder through a nozzle located above the piston. Grazing pressure in the well formed by creating vacuum with compressed gas through hydraulic multiplier compressed gas in the low pressure cylinder through the pipe under the Porsche is ACA wave moves along the cavity well and creates repression-depression impulses. When moving the fluid through the borehole from the wellbore zone to the land surface release the pressure. The technical result of the invention is the formation of a damped standing wave with amplitude independent of the pressure of the fluid in the cavity wells, abandoning the use of complex equipment and improve safety. 1 Il.

The alleged invention relates to mining and can be used for development and rehabilitation of well production wells, reduced due to clogging of wellbore zone of asphalt formations and solids.

A method of processing wellbore zone and device for its implementation (agliullin M. N., Kurbanov A. S., Rakhmatullin R. H., Abdullin, M. M. Patent No. 2123591, CL. E 21 In 43/25), which produce simultaneous physical and pulse depression-repressione effect to stabilize the current values of hydroconductivity.

However, the method requires the use of the column tubing, descent equipment and cable using winches and so on

There is a method of treatment which descend into the well implosion device, download machining part, push it into the formation, conduct cleanup by creating multiple implosion effect.

However, the method requires the use of the column tubing, packer, implosion device, a processing composition and so on

A known method of cleaning wells from deposits in the course of its operation (Veliyev F. G., R. Kurbanov A-I. Aliev, E. N., Patent No. 1700207, CL. E 21 In 37/00), which periodically generate at the wellhead wave of negative pressure, which overlap with the gate valve in the discharge line and stand her in the blocked state, then open.

However, the maximum change in pressure from a hydraulic shock when opening the flow line is 1.5 MPa for a fraction of a second, that is not enough for the formation of powerful waves, in addition, you must use the column tubing and pump to ensure its power.

The known method development and purification wellbore zones pulsed drainage (Nosov P. I., Stockin P. D., Nurislamov N. B. and other Patent No. 2159326, CL. E 21 In 43/25), taken as a prototype, in which the formation of the depression of the pressure difference between the near-wellbore area of the formation and poison pressure in the near-wellbore area of the formation in the form of a damped standing wave, moving on cavity wells and grazing pressure when moving the fluid through the borehole from the wellbore zone to the land surface with a sharp opening of the cavity of the well.

However, the amplitude of a damped standing wave depends on the fluid pressure in the cavity of the well.

The objective of the invention is the formation of a damped standing wave with amplitude independent of the fluid pressure in the cavity wells, abandoning the use of complex equipment and increase security.

The task is solved in that, using the processing method of wellbore zone, including the formation of a depression pressure differential between the well bore area of the reservoir and the cavity of the well, by creating a periodic pressure pulses in the near-wellbore area of the formation in the form of a damped standing wave moving through the cavity wells and creating repression-depression pulses, and the drain pressure when moving the fluid through the borehole from the wellbore zone to the land surface, the well will be equipped with a latch, above it is mounted high-pressure cylinder with a lateral outlet for pouring liquid and drain impurities, and with the piston, and above him coaxial - cylinder low-pressure hydraulic multiplier, periodic pressure pulses in the near-wellbore area of the formation of a damped standing wave formed by a blow on the surface of the borehole fluid discharge of compressed gas through hydraulic multiplier compressed gas in the low pressure cylinder through a nozzle located above the piston, under pressure, the smaller the ratio of the squares of the diameters of the cylinders, the grazing pressure in the well is formed by creating a vacuum over hydraulic multiplier compressed gas in the low pressure cylinder through the pipe under the piston, under pressure, the smaller the ratio of the squares of the diameters of the cylinders.

This method allows you to restore a hydraulic connection between the cavity of the well and the reservoir without downtime for major repairs, the use of equipment for lowering and lifting the downhole pipes, and electricity.

An example of a device for the implementation of the proposed method is illustrated by a drawing, in which: 1 - well; 2 - valve; 3 - high pressure cylinder; 4 - piston high-pressure cylinder; 5 - low pressure cylinder; 6 - piston of the low pressure cylinder; 7 - side pipe; 8 - nadporshnevaya the pipe supply of compressed gas; 9 - podperson is rosedene works. Above the valve 2 is mounted a high pressure cylinder 3 and a piston 4, above coaxially set the low pressure cylinder 5 with the piston 6. The pistons of both cylinders are interconnected. The high pressure cylinder 3 has a side outlet 7, the low-pressure cylinder has nadporshnevaya 8 and podporchenyj 9 pipes for the supply of compressed gas.

The method is implemented as follows. In the well 1 through the pipe 7 pour the liquid to the level of the piston 5. Through pipe 8 serves compressed gas, under pressure of which the piston 6 moves downward, the piston 4 connected to the piston 6 moves downward and has a striking impact on the surface of the borehole fluid. Is formed by the pressure wave, which moves along the cavity wells from the mouth to the bottom and back, creating beats, including in the near-wellbore area of the formation. Repression-depression pulses allow you to break the adsorption deposits on the walls of the pore channels.

The cylinder 5 has a diameter larger than the cylinder 3, so to get in the cylinder 3 pressure sufficient to repression-depression impulses movement of the downhole fluid in the cylinder 5 serves less pressure on the value of the ratio of the squares of the diameters of the cylinders. Under the action of pressure salt to concentrate energy in the direction of the borehole bottom.

After processing wellbore zone periodic pressure pulses damped standing wave compressed gas released from newportnews part of the cylinder 5. Through pipe 9 compressed gas is injected into podporchennuyu part of the low pressure cylinder 5, the pistons 4 and 6 are moved upward in the hole created by the depression, helping the removal of contaminants from the wellbore zone in the cavity well. Heavy pollution down in the sump, light - float to the surface and removed from the cavity of the bore through the outlet 7.

The process is repeated until the desired degree of cleaning wellbore zone.

To influence the near-wellbore area of the formation using a combination of hydraulic shock, contributing to the adsorption separation of sediment from the walls of the pore channels and creates a vacuum for depressive pressure drop across the perforations of the well and removal of dirt into the well.

In the process of wellbore zone actively used to move pistons up and down, and move down should be done with maximum acceleration.

When carrying out cleaning wellbore zone do not require pumping AG the CSOs pressure. The use of low pressure at the reception and transmission of the compressed gas increases the safety of operations.

When using compressed air, there is no danger of ignition when in contact with the gas emitted by the downhole fluid, because they are separated by two pistons.

The described method can be used on wells equipped with column tubing, and without it and used without downtime for major repairs, as well as during overhaul replacing the swabbing operation.

Downhole fluid may contain chemicals for more efficient cleaning. The method can be applied in conjunction with other treatments wellbore zone: acid, heat, vibroimpulsnoj, acoustic and so on

Claims

The processing method of wellbore zone, including the formation of a depression pressure differential between the well bore area of the reservoir and the cavity of the well by creating a periodic pressure pulses in the near-wellbore area of the formation in the form of a damped standing wave moving through the cavity wells and creating repression-depression impulses, and stralian the different topics that the well will be equipped with a latch, above it is mounted high-pressure cylinder with a lateral outlet for pouring liquid and drain impurities, and with the piston, and above him coaxial - cylinder low-pressure nozzles for the supply of compressed gas and with the piston connected to the piston of the high pressure cylinder forming a hydraulic multiplier, periodic pressure pulses in the near-wellbore area of the formation of a damped standing wave formed by a blow on the surface of the borehole fluid discharge of compressed gas through hydraulic multiplier compressed gas in the low pressure cylinder through a nozzle located above the piston, under pressure, the smaller the ratio of the squares of the diameters of the cylinders, the grazing pressure in the well is formed by creating a vacuum over hydraulic multiplier compressed gas in the low pressure cylinder through the pipe under the piston, under pressure, the smaller the ratio of the squares of the diameters of the cylinders.



 

Same patents:

The invention relates to the oil industry
The invention relates to the oil industry and, in particular, to methods for development of oil fields with maintaining reservoir pressure (PAP) method of waterflooding

The invention relates to the oil industry and can be used for development of wells with contaminated bottom area

The invention relates to the oil industry, in particular to methods of well stimulation using ultrasound effects on the bottomhole zone of the reservoir (PPP)

The invention relates to mining and can be used for development and rehabilitation of well production wells, reduced due to clogging of wellbore zone of asphalt formations and solids

The invention relates to mining and can be used for development and rehabilitation of well production wells, reduced due to clogging of the formation of tar and asphalt-wax formations

The invention relates to mining and can be used to restore the production rate of wells falling due to buildup on the walls of the tubing asphalt formations (ASPO)

The invention relates to the oil industry and can be used for continuous recovery of reservoir properties bottomhole producing wells, including after the killing, and subsequent oil pump method
The invention relates to the oil and gas industry and may find application in the treatment of bottom-hole zone of the well

The invention relates to the oil industry and can be used for registration of the change in time of the pressure in the well when conducting perforating operations

FIELD: oil and gas extractive industry.

SUBSTANCE: device has pipe-like body with detachable upper and lower sleeves. Concentrically to body, with possible rotation relatively to it, a cover is mounted with blades with scrapers placed spirally on its surface. To lower sleeve a reactive end piece is connected with slit apertures. End piece hollow is filled with granulated material engaging in exothermal reaction with acid. Lower portion of end piece is provided with check valve. Upper sleeve is provided with check valve having locking element in form of sphere with shelf and centering elements, to be dropped from well mouth. Base of saddle of check valve is made in form of disc having diameter equal to diameter of body. Pass aperture of saddle in lower portion is overlapped with easily destructible and easily removed element. Length of sphere shelf is greater than height of pass aperture of saddle of check valve of upper sleeve.

EFFECT: higher reliability, higher efficiency, broader functional capabilities of device.

3 cl, 4 dwg, 1 tbl

FIELD: oil and gas production.

SUBSTANCE: groups of high intake- and low intake-capacity injecting wells are chosen in a single hydrodynamic system and, for each well, oil reservoir properties and permissible degree of pollution of fluid received by high intake-capacity wells are determined. When fluid from low-permeable oil reservoir flows off through high intake-capacity wells, this fluid is cleaned to permissible degree of pollution.

EFFECT: reduced losses in intake capacity of formations and increased time between treatments of wells.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes forming of gas pillow by forcing gas into inter-tubular space. Further pushing liquid is forced therein with forcing away of liquid from inter-tubular space along tubing column into tank or store, pressure is dropped from inter-tubular space down to atmospheric and hydro-impact is used to effect well face by rotating liquid flow from tubing column. Pillow is formed by plant for forcing pushing liquid and gases. As gas, mixture of air and exhaust gases is used in relation no greater than 2:3. pillow pressure provides for prevention of gas from getting into tubing column. Volume of pushing liquid is determined from formula: Vpl=0.785.(d

21
-d22
).(HT-Hgp-Hi-t).10-6, where d1 - inner diameter of casing column, mm; d2 - outer diameter of tubing pipes, mm; HT - depth of lowering tubing column in well, m; Hgp - height of gas pillow in inter-tubular space, m; Hgp=K·Pgp; K - hydrostatic coefficient of resistance to pushing of liquid and gas (K=100 m/MPa), m/MPa; Pgp - end pressure of gas pillow, MPa; Hi-t - inter-tubular space height.

EFFECT: higher safety, higher efficiency.

3 cl, 2 dwg, 2 ex, 1 tbl

FIELD: oil industry.

SUBSTANCE: device has pump, placed on well mouth equipment, tubing string, passing downwards in casing string of well. Node of hollow cylinders is connected to lower portion of tubing string. A couple of pistons is placed inside cylinders node and connected to pump via pump bars and gland rod. For compression of liquid within cylinders node, pump is enabled. Compressed liquid is outputted into casing column, and strike wave is formed as a result. Cylinders node includes upper cylinder, lower cylinder. Transfer cylinder is placed below upper and above lower cylinders. Cylinder with compression chamber is placed between transfer cylinder and upper cylinder. Lower cylinder is made with possible placement of lower piston, and upper cylinder is made with possible placement of upper piston. Lower piston has larger diameter, than upper piston. Displacement of piston affects volume of compression chamber, decreasing it. Liquid in the chamber is compressed. During downward movement of piston liquid is lowered into well. Seismic data from wells at remote locations are gathered and processed.

EFFECT: higher efficiency.

4 cl, 9 dwg

FIELD: oil industry.

SUBSTANCE: device has receiving chamber with solid-fuel charges and igniter, combustible plug and air chamber with atmospheric pressure. Receiving chamber is perforated along whole length by apertures for outlet of combustion products. Charge adjacent to upper end of receiving chamber burns from its end. It is made of heat-resistant low-gas slow-burning compound with high temperature of combustion products and high caloricity, with low dependence of burning speed from pressure and it is protected from burning at side surface by compound preventing burning thereon, but burning together with charge. Charge, adjacent to plug, is of channel construction, quick-combustible, and it is made of heat-resistant gas-generating compound. Igniter is mounted in upper end of charge, adjacent to upper end of receiving chamber. Air chamber with atmospheric pressure is placed below receiving chamber.

EFFECT: higher efficiency.

2 cl, 1 dwg

FIELD: oil industry.

SUBSTANCE: device for complex treatment of face-adjacent well zone has thermal gas-generator charged with fuel with electric igniter and pipe-shaped container with acid solution, made with perforation apertures, both mounted on rope-cable. Acid solution is positioned in thermal-melting hermetic tank inside the container. Device is additionally provided with depression chamber and impact-wave effect chamber, containing remotely controlled fast-action locks, with two packers, mounted at ends of pipe-shaped container. Packers are opened under pressure from gases from gas generator. After operation of gas generator is finished, packers release pipe-shaped container. Depression chamber, impact-wave effect chamber and gas generator are jointly connected.

EFFECT: higher efficiency.

2 cl, 1 dwg

FIELD: oil industry.

SUBSTANCE: method includes determining dominating frequency of productive bed by performing prior vibration-seismic action using surface oscillations source at different frequencies and analysis of seismic graphs from seismic receivers in product wells. Vibration-seismic effect on watered portion of productive bed of oil deposit is performed by a group of surface oscillations sources, operating at dominating frequency of productive bed. Bed fluid is extracted via product wells. After vibration-seismic effect on watered portion of productive bed of oil deposit by a group of surface oscillations sources, operating at domination frequency of productive bed, concurrent vibration-seismic effect is performed using two sub-groups of said group of surface oscillation sources. Each sub-group of group operates at determined from mathematical dependence. Average frequency of surface oscillations sources of whole group is equal to dominating frequency of productive bed. Difference in frequencies, on which each sub-group operates, is determined in accordance to linear size of watered portion of productive bed of oil deposit and is satisfactory to mathematical dependence. Concurrent vibration-seismic effect by two sub-groups of said group of surface oscillations sources is performed with forming of wave having length exceeding length of wave with dominating frequency.

EFFECT: higher oil yield.

2 ex

FIELD: mining industry.

SUBSTANCE: processing periods include forming of depression pressure change between well-adjacent bed zone and well hollow. Cleaning of well-adjacent bed zone is performed by prior feeding of fluid into well, forming of periodic pressure pulses in well-adjacent bed zone in form of fading standing wave, moving along the well, and decreasing pressure during fluid movement along well from well-adjacent bed zone to day surface for extraction of clogging. Plant for washing wells is used, which is connected to behind-pipe space of well and to tubing pipe. Behind-pipe space of well is isolated by packer along lower limit of perforation range. Perforation range is filled with sedimentation, formed from destroyed rock, and accumulated above packer as a result of gradual and even cleaning of well-adjacent bed zone along whole length of perforation range. Packer is disabled and well is washed clean, without raising tubing pipes column.

EFFECT: higher efficiency.

1 dwg, 1 ex

FIELD: oil industry.

SUBSTANCE: method includes pulse treatment of productive bed by energy of atmospheric electricity by using lightning discharge. Prior to initialization of storm discharge voltage of electric field above well is measured using measuring block. Initiation of storm discharge is performed when reaching value of strength of electric field above well no less than 30 kV/m and enough for forming leading channel of lightning. To exclude corona as receiver of electric energy metallic mast is used, on upper end of which metallic fragment of spherical form is positioned having smooth external surface, or smooth metallic wire is used with its possible raising towards storm cloud. Output of receiver is connected to casing column of well. Powerful electric discharge along casing column and through its perforated portion gets into area of productive bed and disperses there.

EFFECT: simplified method, simplified construction of device, higher product yield.

2 cl, 1 dwg

FIELD: oil production, particularly to stimulate oil extraction under difficult field development conditions, particularly in the case of carbonate formation treatment.

SUBSTANCE: method involves forming new cracks and/or stimulating existent ones in production bed by serially well flushing and performing periodical depressive and repressive actions along with flushing thereof at circulation or outflow stages; isolating interval to be treated with packer; cyclic changing pressure with following injecting working liquid, for instance oil and/or at least one plug of chemical agent, for example of hydrochloric acid. All above operations are performed along with oscillating action of radiator installed in front of production bed interval to be treated.

EFFECT: increased intensity of production bed treatment and extended operational functionality.

23 cl, 2 ex

Up!