Gas well operation method. RU patent 2513942.
 System, method and carrier read by computer for calculation of well injection flow rates produced by electric submersible pumps / 2513812Group of inventions pertains to monitoring of parameters for wells with wellhead and bottomhole equipment. More specifically these inventions specify the system and method for determination and calculation of the well flow rates produced by electric submersible pumps. The invention concept is as follows: the method for determination of flow rate through electric submersible pump contains stages with the following operations: supply of electric energy to an electric submersible pump from the surface distributing unit; readout of intake pressure by means of processor at the first pressure gage from the well bore bottom in regard to the electric submersible pump and pressure at the output of the second pressure gage; readout of voltage and current values by means of the processor; readout of at least one static value by means of the processor; calculation by means of the processor of flow rate passing through the electric submersible pump, whereby ratio of efficiency factor to the flow rate is calculated with entry of read voltage and current values into power equilibrium equation; non-dimensional flow rate is obtained with entry of the calculated ratio of efficiency factor to the flow rate into statistic data; flow rate is calculated on the basis of non-dimensional flow rate and diagram of calculated flow rates is drawn. |
 System and method for control of multiple downhole tools / 2505674Multiple downhole tools can be driven between operating positions. Downhole tools are connected to a variety of multitapped modules, at that each multitapped module is connected usually to one or downhole tools. Control lines are connected to multitapped modules, and multitapped modules are capable to control downhole tool in bigger quantity than quantity of control lines. Each downhole tool is driven individually delivering pressure through one or several control lines. |
 Device for oil production / 2505666Device includes housing, electric motor, submersible pump with discharge end and intake device and ejector. According to invention device is equipped with housing that forms annular channel with the housing downwards discharge end and upwards ejector. Ejector is located in intake device and made as annular slot. At that ejector inlet nozzle is connected to discharge end of submersible pump through annular channel for the purpose of partial return of pumped oil. At ejector output, before the first pumping step, there is a mixing chamber providing possibility of gaseous phase dispersion and pressure increase. |
 Device for regulation of water cone in well / 2505665Device contains a pump launched into casing string at pipe string with shank end underneath and connected to connecting tube; in the well there are two delivery channels, at that one channel is for oil delivery while the other one is for water delivery from stratum to the well. Channel inputs are located at different levels while outputs are directed to pump suction side. Shank end is equipped from outside with packer installed in casing string at the level of water-oil contact and radial holes of shank end are located higher than packer. At that below radial holes a hollow blind plug is inserted into shank end; connecting tube is inserted into the plug, at that tube can be moved along axis and fixed. However fixation of connecting tube in regard to shank end is made by split locking ring of circular section which is installed in inner groove of the hollow blind plug; this ring fixes the connecting tube in semicircular notches at outside surface of the tube. At that channel for oil delivery is formed by inner space of the casing string upwards packer, radial holes of the shank end and space between the shank end and connecting tube. Channel for water delivery is formed by inner space of the casing string downwards packer and inner space of the connecting tube. Inputs of both channels are located opposite perforated holes in water- and oil-bearing parts of stratum while outputs are directed to pump suction. Due to regulation of water and oil extraction the suggested device also allows preventing mixing of water and oil in process of their raising in the pipe string and producing of product that does not require subsequent separation into different phases; it also allows reducing probability of water-oil emulsion and paraffin deposition in result of fast transfer from water extraction to oil extraction. |
 Method for inter-well fluid pumping / 2503805Method includes packer installation above the production well bed, oil-water emulsion extraction from below-packer space by pump, descended at tube string, emulsion separation to oil and water in down-hole conditions, oil extraction from top part of above-packer annular space to oil pipeline, extraction of formation water and its pumping via water pipeline through injection wells into oil bed with undeveloped oil resources. Pump operation is provided in constant mode, oil-water emulsion is supplied through radial holes in tube string into above-packer annular space, where oil-water emulsion is separated. Water is extracted from above-packer annular space via subsidiary tube, the inlet of which is located below the level of water-oil contact, and its outlet is connected to the water pipeline fitted with flow metre. Oil extraction is additionally performed from tube string into oil pipeline, which is fitted with flow regulator and is connected to the subsidiary tube via bypass line, connected to the oil pipeline after flow regulator for water discharging into it at water pipeline repair works. |
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Method for down-hole treatment of gaslift well product / 2503801 Method includes use of de-emulsifying compound and pour point depressant (PPD). According to invention at bottom hole temperature up to 80°C both reagents are supplied together into pressure-actuated operating agent - gas. When bottom hole temperature exceeds 80°C, PPD is supplied to pressure-actuated operating agent and de-emulsifying compound is supplied into the product at wellhead. Note that water-soluble de-emulsifying compound is used for watered product of 40%, and for watered product of more than 60% there used is an oil-soluble de-emulsifying compound. Any of the said reagent types can be used in interval 40-60%. |
 Method for oil production from formation with abnormally low formation pressure / 2501940Method provides for extraction of formation liquid by means of a bottom-hole pump from vertical production wells drilled so that a sump is formed. A cavity is created in lower part of a productive formation in each vertical production well. In addition, flat directional production wells are drilled, thus attaching the face of each flat directional well to the cavity of the corresponding production vertical well, and mouths of flat directional production wells are interconnected with atmosphere. Diameter of vertical production wells is larger than diameter of flat directional wells. Mouths of flat directional wells are located for example near mouths of neighbouring vertical production wells. Creation of the cavity is performed for example by water jet washing-out of rock by means of a special adapter with a side water jet nozzle, and filling of the cavity with filler is performed for example by gravel alluviation. |
 Application of degradable fibers in solutions of inverted emulsions for well killing / 2499131Method of processing underground bed comprises injection of emulsion inverted solution in cased borehole cutting the bed to well killing. Said method comprises: oily continuous phase, nonoleaginous disperse phase and at least one bridging agent. formation contact with well killing solution and possibility for degradable material to degrade at least partially. Proposed method comprises: production of inverted emulsion for well killing including: oily continuous phase, nonoleaginous disperse phase and at least one bridging agent, injection of said solution in encased perforated borehole, production of filtration crust and its destruction to mallow the material to degrade. Proposed method comprises: production of inverted emulsion for well killing including: oily continuous phase, nonoleaginous disperse phase and at least one bridging agent. Placing the well killing solution in said borehole, formation of filtration crust and destruction of said crust whereat hydrolysis of degradable material destructs said crust. |
 Method for optimising extraction from well with artificial lifting / 2496974Method for optimising extraction from a well is proposed, in which an artificial lifting system in a well shaft is controlled, and multiple parameters of extraction on surface and in the shaft well are monitored. A well model with calculated data parameters is built. Then, measured data on working face and surface of the well is compared to the model data and reliability of the measured data is checked. After that, difference between measured data and modelled data is diagnosed, and operation of an artificial lifting mechanism is adjusted as per the above diagnostics results. |
 Well operation method / 2490436Well is equipped bottom upwards with a tubing string ended with a packer, submerged pump, switch, two outer and inner annulus of the tubing string which are located concentrically, tubes with holes at the outer tubing string. The well is splitted over the productive stratum. The stratal product is delivered by the submerged pump in a cyclic mode "delivery-stop" from the productive stratum through the tubing string, the switch, tubular annulus between inner and outer tubing string, tubes and holes of tubes into tubular annulus between the production string and outer tubing string. Pressure is created and maintained in the upper pert of the well; it should not be less than oil degassing pressure and more than permissible pressure to the production string. Separation of the stratal product into oil and water is arranged in the upper part of the well. Completeness of separation is controlled by the duration of a half of the operation cycle of the submerged pump till stoppage and by the distance between switch and the tube with a hole. Oil is delivered to oil line. Water is supplied through the switch to inner tubing string and through the pipeline to an injection well by borehole-to-borehole water pumping and/or through tubular annulus between the production string and outer tubing string and tubing string with a packer to the stratum over the packer by borehole water pumping. |
 Method of examining wells / 2244105Invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value. |
 Foam-forming compound for shutting wells / 2245441Foam-forming compound for shutting wells contains hydrocarbon liquid, mixture of surfactants, one of components thereof is water solution of lignosulphonate reagent of 25% concentration, herbal filling agent and 20% water solution of calcium chloride, as lignosulphonate agent reagent it contains powder-like technical lignosulphonate, and as other component of surfactant mixture - hexamethylentetramine, and as herbal filling agent - peat or grass flour with following ratio of components in percents of mass: hydrocarbon liquid 12-14, said water solution of technical powder-like lignosulphonate 17-21, hexamethylentetramine 0.17-0.63, peat or grass flour 3-6, said calcium chloride solution - the rest, while relation of mass portions between said water solution of technical powder-like lignosulphonate and hexamethylentetramine is 1: 0.01-0.03 respectively, as grass flour it contains pulverized herbal waste of grain bread production or similar substance. |
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Compound for blocking and shutting wells / 2245996 Compound includes water and inhibiting salt, as inhibiting salt contains processed electrolyte - side product during production of magnesium via electrolysis from carnallite, and additionally as reducer of filtering and thickener - carbooximethylcellulose polymer, and as colmatation agent - magnesium oxide with following relation of components in percents of mass: processed electrolyte - side product of magnesium production via electrolysis from carnallite 10.0-15.0, carbooximethylcellulose 2.5-3.0; magnesium oxide 1.0-2.0, water 80.0-86.5. |
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Well killing polysaccharide gel composition and method for producing the same / 2246609 Claimed polysaccharide gel contains sweet or mineralized water, polysaccharide gelling agent, boron cross-linking agent, diethanolamine, quaternary ammonium compounds, and mixture of non-ionic and anionic surfactant (complex surfactant). Mixture of water soluble oxyethilated alkylphenols and their sulphoethoxylates in form of sodium salts or salts with triethanolamine is used as complex surfactant in amount of 0.1-0.5 kg on 1000 l of water being the gel base. Polysaccharide gel is obtained by dissolution and hydration of polysaccharide gelling agent in sweet or mineralized water (preferably monovalent ion solution) followed by treatment of obtained polysaccharide solution with aqueous solution including boron cross-linking agent, diethanolamine, quaternary ammonium compounds, and complex surfactant. |
 Method for extraction of hydrocarbon deposit with sole water and extraction of hydrocarbon by sucker-rod compressor pump with separated intake of hydrocarbon and water / 2247228Method includes mounting compressor pump in such a way, that input aperture of tail piece was positioned below bed sole. Prior to that water cone in face-adjacent zone is destroyed by draining water through tail piece, connected to lower suck-in valve of compressor pump cylinder, and along behind-pipe space through side suck-in valve of compressor pump cylinder. In case of increase of hydrocarbon contained in drained liquid beginning of water cone destruction is assumed. Draining is continued until destruction of emulsion in water cone, formed in non-homogenous porous environment of bed at limits of hydrocarbon-water and water-hydrocarbon, separation of water and hydrocarbon streams and bringing current water-hydrocarbon contact to initial position. Then during extraction water is drained through tail piece, and hydrocarbon - along behind-pipe space. |
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Well stopping method / 2250360 Method includes preparation of technological liquid - water solution of sylvinite ore mixture with chlorine calcium by solving a mixture of components in hot fresh technical water, drained from oil and water preparation plants or bed water. During solution of sylvinite ore mixture with chlorine calcium in bed water the latter is drained from the well at temperature 60-90°C. Technological liquid is produced with solution density 1.23-1.37 t/m3. Then prepared technological liquid is fed into well shaft a bit lower, oppositely to zone and above ceiling of productive bed with forming of hydraulic column above the latter. Then well shaft to the mouth is filled with water. Value of technological liquid hydraulic column of high density on basis of said mixture, fed into well shaft above ceiling of productive column of technological liquid is taken in amount, necessary and enough from well stopping conditions. |
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Well killing composition / 2254454 Water-based composition that can be used for killing of well during pullout of hole and well remedial work as well as for temporary abandonment of well contains, wt %: carboxymethylcellulose3.5-4.5, sodium hydroxide1.5-2.0, copper sulfate 0.3-0.4, and methanol 4.0-16.0. |
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Method for shutting a well / 2255209 Method includes serial pumping into well of buffer, blocking and pressing liquid, blocking liquid contains hydrocarbon base, acyclic acid, caustic soda and mineral filler with following relation of components in percents of mass: hydrocarbon base 41-72, acyclic acid 6.1-14.4, caustic soda 4.9-13.0, mineral filler the rest. Hydrocarbon base of blocking liquid is oil or oil processing products. As mineral filler blocking liquid has calcium carbonate with diameter of particles no less than 2 micrometers. |
 Method for operating gas-lifting oil well, gas-lifting oil well and method for controlling flow of multi-phase flowing substance in gas-lift oil well / 2256067At least one acoustic dynamic is mounted immediately on product pipe in oil well and acoustic characteristic of flowing environment flow is determined in product pipe. It is sent into surface controller, using product pipe. Using surface controller flowing substance flowing mode is determined, on basis of which working parameters of oil well are adjusted. Working parameters of oil well can be adjusted to detect Taylor mode of flow. For adjustment of working parameters throttle is used and/or controlled valve of oil well, controlling amount of gas, forces into product pipe. For determining mode of flow of flowing environment artificial neuron net can be used. It is possible is provide energy for acoustic sensor through product pipe. It is possible to determine additional physical characteristics of flowing substance, for example pressure and temperature. |
 System for controlling connections and feeding of electric current, oil well for extracting oil products (variants) and method for extracting oil product from oil well / 2256074System has first induction throttle, second induction throttle and controlled switch. Second induction throttle is positioned near second branch of pipeline structure. Controlled switch has two outputs. First switch output is electrically connected to pipeline structure on the side of induction throttles connection, where first and second branches of pipeline structure intersect. Second output of switch is electrically connected to pipeline structure on other side of at least one induction throttle. Pipeline structure can be positioned inside oil well, and can have casing string and operation tubing column. Also described is method for extracting oil products from oil well using said system. |
FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil and gas industry and namely to operation of gas wells at the closing stage of development, in particular, to operation of gas wells with insufficient gas velocity for liquid export from the bottomhole. The concept of the invention is as follows: according to the method the gas well is equipped with a main production string and a concentric central production string placed in it with formation of annular space between these strings. End surface of the central production string is placed below the end surface of the main production string while gas extraction is carried out simultaneously through the central production string and the annular space. At that extraction of gas through the central production string is made with flow rate that is one and a half times higher than the rate required for liquid extraction from the well and gas flow rate through annular space is set so that it does not exceed the value of operating flow rate. In a pathway of the flow from the central production string a metre is installed and in a pathway of the flow from the annular space an automatic gas flow regulating valve is installed. Then the flows are combined and sent to the similar metre, at that electric signal of the metre installed in the flow of the central production string and the metre of the combined flow are sent to controllers of automatic control system which is used for analysis of received data; and a command is sent to the automatic gas flow regulating valve thus optimising total production rate of the well considering filtration resistance of the well in compliance with analytic expression.
EFFECT: providing optimisation of gas well operation method that allows operation of gas wells without interruption for liquid removal.
3 ex, 1 dwg
The invention relates to the oil and gas industry, namely, to the operation of gas wells in the final stages of development, in particular to the operation of the so-called samosudova wells, that is, wells, in which the velocity of the gas flow is insufficient to removal of fluid from the slaughter.
At the final stage of development of gas fields formation energy is not enough to provide the removal accumulates on the bottom of the liquid from the wells. Under the influence of all the increase of the volume of the liquid well stop, as the energy of the reservoir and, accordingly, the velocity of the gas stream is not sufficient for carrying out of the liquid on the surface. Upon reaching the specific elevation of post this liquid on the bottom of the gas from the reservoir cannot overcome liquid barrier and well samosudova, that is suppressed [Kustyshev A.V. Complex repairs of gas wells in Western Siberia. - M: Gazprom Expo 2010. - 212 C.]
For remove the liquid from the bottom of gas wells using different methods, for example:
- purge of the wellbore in the atmosphere or pipeline;
- pumping on the face liquid or solid surface-active substances;
- reduction of the diameter tubing string;
- application of plunger lift.
The known method of operation of gas wells, including gas extraction in the annular space and a tubing string with limited selection of gas from the annular space by throttling [RF patent №345266 EV 43/00].
The disadvantage of this method of operation of gas wells is that removal of fluid from the slaughter it is necessary to periodically stop the hole.
The task of creation of the invention consists in ensuring the continuous removal of fluid from the trunks gas wells to eliminate the conditions of their self push.
The technical result of the invention is to optimize the mode of operation of gas wells, which allow to exploit them without stopping to remove all liquid.
The technical result is achieved by the fact that in the known method of operation of gas wells, in which gas well equipped with the main lift column and concentric with its Central Elevator column, with the formation of the annular space between them, the side of the Central tubing string is placed below the face major tubing string, and a selection of gas takes place simultaneously on the Central Elevator the column and the circular space, while gas extraction in the Central Elevator column lead with a rate of one and a half times greater than the rate necessary for carrying out the liquid from it, and the flow of gas through the annular space of the set of such magnitude that it does not exceed the value of the work flow rate, on the way flow from Central tubing string set the flow mernoe device, the flow path of the annular space set automatic control valve flow rate of the gas then flows are combined and sent to the similar flow measuring device, while the electrical signals from consumption opernogo device thread Central tubing string and flow measuring devices combined stream sent to the controllers automatic control complex, which analyze the data and serves a command on automatic control valve gas flow optimizing total well flow rate with account of fluid flow resistance of the well and in accordance with the formula:
where q is a work flow, thousand m 3 /day;
a - filtration coefficient, which characterizes the degree of pollution of bottom-hole zone, MPa 2 nights/thousand m 3 ;
b - filtration coefficient, characterizing the degree mikroheranhvatho rocks (MPa·day/thousand m 3 ) 2 ;
Q - filtration coefficient, characterizing the hydraulic resistance of gas flow depending on the design of the well (MPa·day) 2 /thousand m 3 ;
P PL - pressure, MPa;
R u - pressure at the mouth, MPa;
e is the base of the natural logarithm;
s - dimensionless multiplier
Implementation of the method is illustrated in Fig., which schematically gas well equipped with the equipment, excluding conditions closedatabase, i.e. accumulation of fluid in the face.
Well consists of an operational column 1, the main lift columns 2, concentrically placed in the Central tubing string 3, with the formation of the annular space 4 between them. The bottom end of the Central tubing string 3 below butt main tubing string 2. The well-equipped surface valves 5, including, in particular, pipelines 6, 7 estuarine binding. The pipeline mouth strapping 7 is connected with the annular space of 4, it has been consistently found to string valve 8, throttle device 9 and automatic control valve gas consumption (ECRG) 10. The pipeline mouth strapping 6 is connected to pipe Central tubing string 3, it has been consistently found to string gate valve 11, throttle device 12 and flow measuring device 13. Output pipelines mouth strapping 6 and 7 of the joint. The total pipeline mouth tying 14 fitted with flow measuring device 15.
Well equipped with an automatic control complex (APK) 16. At the entrance auctions 16 receives electrical signals from the flow measuring devices 13 and 15. Using auctions 16 analyze the incoming signals and compared with the values specified algorithm and provides alerts on ARGRG 10, altering the flow through the flow area annular space 4.
The method is implemented as follows.
The well is completed and put into operation.
The selection of gas from the perforation interval 17 productive formation 18 are carried out by the Central Elevator column 3 and annular space 4. Together with gas from the perforated interval 17 productive formation 18 and slaughter 19 wells in Central Elevator column 3 shall be made liquid.
In case of reduction of this rate in the Central Elevator column 3, the liquid is separated from the gas stream, and falls back to the slaughter 19. Therefore, to control the velocity of a gas stream in the Central Elevator column 3 and annular space 4 uses a system of control and regulation. With the help of flow measuring devices 13 and 15 installed on the pipeline mouth strapping 6 and on the overall pipeline mouth tying 14, carry out the measurement of the cost of gas and transmit that information in the form of electrical signals on oak 16. Here this information is processed, identified in accordance with set algorithm, the corresponding signal is fed to ARGRG 10 for changing flow area.
When reducing bore ARGRG 10, the speed of movement of gas through the annular space 4 is reduced, and the speed of movement of gas in Central Elevator column 3 increases, which enables you to move alongside gas from gas-liquid with slaughter 19.
When restoring the removal of fluid from auctions 16 electrical signal ARGRG 10, allowing to increase the flow area ARGRG 10 to establish optimum regime of the well.
The algorithm by which auctions controls work well, is calculated in accordance with the formula for determining the work flow.
Office automation total well flow rate with account of fluid flow resistance of the wells is determined in accordance with the formula:
where q is a work flow, thousand m 3 /day;
a - filtration coefficient, which characterizes the degree of pollution of bottom-hole zone, MPa 2 nights/thousand m 3 ;
b - filtration coefficient, which characterizes the degree mikroheranhvatho rocks (MPa·day/thousand m 3 ) 2 ;
Q - filtration coefficient characterizing hydraulic resistance of gas flow depending on the design of the well (MPa·day) 2 /thousand m 3 ;
P PL - pressure, MPa;
R u - pressure at the mouth, MPa;
e is the base of the natural logarithm;
s - dimensionless multiplier
When executing this command from the auctions on 16 ARGRG 10 gas extraction in the Central Elevator column 3 lead with a flow rate exceeding one and a half times the rate necessary for carrying out the liquid from the bottom 19 wells and flow of gas through the annular space of 4 set of such magnitude that it does not exceed the value of the work flow.
Removed from the borehole liquid with gas is delivered to gas gathering collector, goes to a gas separator on the installation of complex preparation of gas treatment unit (GTU) and removed from the technological system of production.
Examples of implementation of the invention.
Example # 1 In production casing 1 with a diameter of 219 mm samosudova gas well down the main Elevator column 2 diameters of 168 mm It added to descend Central Elevator column 3 diameter 89 mm with the placement of the lower end of the Central tubing string to 3 m below the end of the main lift column 2. The main 2 and 3 Central Elevator pillars form an annular space 4.
The well equipped surface valves 5 brand AFK 6-150/100 x 21, including, pipelines 6, 7 estuarine binding. The pipeline mouth strapping 7 connect with the annular space of 4, it has consistently set string valve 8 brand ZMS 100 x 21, throttle device mark 9 UDC 100 x 21 and automatic control valve gas consumption (ECRG) of 10 stamps of the Republic of Kazakhstan-100 x 21. The pipeline mouth strapping 6 connect with pipe Central tubing string 3, it has consistently set the string valve 11 brand ZMS 80 x 21, throttle device 12 brand UDC 80 x 21 and flow measuring device 13, made on the basis of "Venturi tubes". Output pipelines mouth strapping 6 and 7 unite. The total pipeline mouth tying 14 fitted with flow measuring device 15, made on the basis of "Venturi tubes".
Well supply automatic control complex (APK) 16 On the entrance auctions 16 receives electrical signals from the flow measuring devices 13 and 15. Auctions parses the incoming signals and compares with the values specified algorithm and signals on ARGRG 10, changing its initial section, thus changing the flow through the flow area annular space 4.
The well is completed and put into operation. The selection of gas from the perforation interval 17, located in the range from 850 m to 1200 m productive formation 18, is carried out by a Central lift column 3 and annular space 4. Together with gas from the perforated interval 17 and the bottom hole on the escalators of the Central column 3 rises liquid at a rate of 6.7 m/s While reducing the speed of the Elevator in the Central column 3, the liquid is separated from the gas stream, and falls back to the bottom. Electrical signals flowmeters 13, 15 installed on the pipeline mouth strapping from working strings x-Mas tree and the General line 6 estuarine tying 14, transmit the information to the auctions 16. Here this information is processed by a given algorithm, the command to ARGRG 10, the result is changed its flow section, thereby recovering condition, according to which gas extraction in the Central Elevator column 3 lead with a flow rate exceeding one and a half times the minimum flow required for the removal of fluid from the borehole bottom (50 thousand m 3 /day). Thus the flow of gas through the annular space of 4 set of such magnitude that it does not exceed the value of the work flow rate (less than 130 thousand m 3 /day). Flow rates are calculated by the analytical dependences with the help of specially developed software product. The coefficients taken in the following values:
a=0.00241 MPa 2 nights/thousand m 3
b=0,000009226 (MPa·day/thousand m 3 ) 2 ;
Q=0,381498 (MPa·day) 2 /thousand m 3 .
Example # 2 In the production casing 1 168 mm in diameter samosudova gas well down the main Elevator column 2 with a diameter of 114 mm It added to descend Central Elevator column 3 60 mm in diameter with the placement of the lower end of the Central tubing string on 1 m below the end of the main lift column 2. The main 2 and 3 Central Elevator pillars form an annular space 4.
The well equipped surface valves 5 brand AFK 6-100/100 x 21, including, pipelines 6, 7 estuarine binding. The pipeline mouth strapping 7 connect with the annular space of 4, it has consistently set string valve 8 brand ZMS 80 x 21, throttle device mark 9 UDC 80 x 21 and ARGRG 10 brand RC-80 x 21. The pipeline mouth strapping 6 connect with pipe Central tubing string 3, it has consistently set the string valve 11 brand ZMS 60 x 21, throttle device 12 brand UDC 60 x 21 and flow measuring device 13, made on the basis of "Venturi tubes". Output pipelines mouth strapping 6 and 7 unite. The total pipeline mouth tying 14 fitted with flow measuring device 15, made on the basis of "Venturi tubes".
Well supply auctions 16. At the entrance auctions 16 receives electrical signals from the flow omernik devices 13 and 15. Auctions parses the incoming signals and compares with the values specified algorithm and signals on ARGRG 10, changing its initial section, thus changing the flow through the flow area annular space 4.
The well is completed and put into operation. The selection of gas from the perforation interval 17, located in the range from 1100 m to 1250 m productive formation 18, is carried out by a Central lift column 3 and annular space 4. Together with gas from the perforated interval 17 and the bottom hole on the escalators of the Central column 3 rises liquid at a rate of 6.7 m/s While reducing the speed of the Elevator in the Central column 3, the liquid is separated from the gas stream, and falls back to the bottom. Electrical signals flowmeters 13, 15 installed on the pipeline mouth strapping from working strings x-Mas tree and the General line 6 estuarine tying 14, transmit the information to the auctions 16. Here this information is processed by a given algorithm, the command to ARGRG 10, the result is changed its flow section, thereby recovering condition, according to which gas extraction in the Central Elevator column 3 lead with a flow rate exceeding one and a half times the minimum flow required for the removal of fluid from the borehole bottom (22 thousand m 3 /day). Thus the flow of gas through the annular space of 4 set of such magnitude that it does not exceed the value of the work flow rate (less than 60 thousand m 3 /day). Flow rates are calculated by the analytical dependences with the help of specially developed software product. The coefficients adopted the following values:
a=0.00241 MPa 2 nights/thousand m 3
b=0,000009226 (MPa·day/thousand m 3 ) 2 ;
Q=0,650198 (MPa·day) 2 /thousand m 3 .
Example # 3 In the production casing 1 with a diameter of 219 mm samosudova gas well down the main Elevator column 2 in diameter 168/127 mm It added to descend Central Elevator column 3 of 73 mm diameter with the placement of the lower end of the Central tubing string to 2 m below the end of the main lift column 2. The main 2 and 3 Central Elevator pillars form an annular space 4.
Well supply auctions 16. At the entrance auctions 16 receives electrical signals from the flow omernik devices 13 and 15. Auctions parses the incoming signals and compares with the values specified algorithm and signals on ARGRG 10, changing its initial section, thus changing the flow through the flow area annular space 4.
The well is completed and put into operation. The selection of gas from the perforation interval 17, located in the range from 950 m to 1100 m productive formation 18, is carried out by a Central lift column 3 and annular space 4. Together with gas from the perforated interval 17 and the bottom hole on the escalators of the Central column 3 rises liquid at a rate of 6.7 m/s While reducing the speed of the Elevator in the Central column 3, the liquid is separated from the gas stream, and falls back to the bottom. Electrical signals flowmeters 13, 15 installed on the pipeline mouth strapping from working strings x-Mas tree and the General line 6 estuarine tying 14, transmit the information to the auctions 16. Here this information is processed by a given algorithm, the command to ARGRG 10, the result is changed its flow section, thereby recovering condition, according to which gas extraction in the Central Elevator column 3 lead with a flow rate exceeding one and a half times the minimum flow required for the removal of fluid from the borehole bottom (32 thousand m 3 /day). Thus the flow of gas through the annular space of 4 set of such magnitude that it does not exceed the value of the work flow rate (less than 70 thousand m 3 /day). Flow rates are calculated by the analytical dependences with the help of specially developed software product. The coefficients adopted the following values:
a=0.00241 MPa 2 nights/thousand m 3
b=0,000009226 (MPa·day/thousand m 3 ) 2 ;
Q=0,52609 (MPa·day) 2 /thousand m 3 .
The method of operation of gas wells, in which gas well equipped with the main lift column and concentric with its Central Elevator column education the annular space between them, the side of the Central tubing string is placed below the face major tubing string, and a selection of gas takes place simultaneously on the escalators of the Central column and the circular space, while gas extraction in the Central Elevator column lead with a rate of one and a half times exceeding the rate necessary for carrying out the liquid from it, and the flow of gas through the annular space of the set of such magnitude that it does not exceed the value of the work flow, the flow path from the Central tubing string set flow measuring device, the flow path of the annular space set automatic control valve flow rate of the gas then flows are combined and sent to the similar flow measuring device, in this case the electric signals from the flow measuring device thread Central tubing string and flow measuring devices combined stream direct on controllers automatic control complex, which analyze the data and serves a command on automatic control valve of gas consumption by optimizing the total well flow rate with account of fluid flow resistance of the well and in accordance with the formula
q = a 2 + 4 ( b + Q ) ( R p l 2 - R at 2 x e 2 s ) - a 2 ( b + Q )where q is a work flow, thousand m 3 /day; and - filtration coefficient, which characterizes the degree of pollution of bottom-hole zone, MPa 2 ·day/thousand m 3 ; b - filtration coefficient, characterizing the degree mikroheranhvatho rocks (MPa·day/thousand m 3 ) 2 ; Q - filtration coefficient, characterizing the hydraulic resistance of gas flow depending on the design of the well (MPa·day) 2 /thousand m 3 ; P PL - pressure, MPa; R u - pressure at the mouth, MPa; e is the base of the natural logarithm; s - dimensionless multiplier.