Method of supply of hydrocarbons from watering out formation

FIELD: oil and gas industry.

SUBSTANCE: method involves use of the well and flow column lowered to it, pumping to productive formation of liquid or liquid-gas mixture prepared by using the mixing device the discharge of which is interconnected with flow column, and low and high pressure chambers - with gas and/or liquid sources. According to invention, the pumping of liquid or liquid-gas mixture is performed periodically to the watered-out interval of productive formation. On bottom hole of the well, in annular space between flow column and casing string in the interval above and within the limits of the watered-out part of productive formation there installed are not less than two packers. Annular space in the packer installation interval is filled with non-newtonian fluid. Two circulation valves are installed in flow column. One is installed in watered-out interval of the formation, and the other one - above the upper packer.

EFFECT: increasing operating efficiency of wells at hydrocarbon deposits, the operation of which is complicated with water penetration into deposits.

5 cl, 1 dwg

 

The invention relates to the oil and gas industry, in particular to methods for increasing the efficiency of the wells on the mineral deposits, the exploitation of which is complicated by the receipt of deposits in the water.

Known technical solution for AV. St. USSR SU # 1833461, according to which of the wells provide water withdrawal from water-saturated interval of the reservoir until the pressure therein below the pressure of the gas in the gas-saturated interval of the reservoir, which control set by the ratio of the volume of the gas/fluid pumped from the production wells. When selecting water in a well bore zone is created depression funnel with minimum values of pressure near the wellbore, which promotes gas in the saturated part, resulting in permeability for gas increases and water is reduced. After reaching the values of the relations of volumes of gas medium to the liquid G:W=(70...80): (20...30) produces killing the well and the isolation of the perforated zone of the casing setting a cement bridge, produce a perforation at the site of the gas-saturated interval of the reservoir and cause the gas to flow. This solution provides an exception premature irrigation wells, increasing hasoutdata, reducing the cost of development wells and the insulation performance of the reservoir bottom waters.

what dostatkom of this technical solution is after plugging wells and isolation of the perforated zone of the casing formed in the stalk volume of the reservoir increased the saturation of the rock gas in the presence of vertical hydrodynamic communication in the reservoir gradually disbanded. The gas formed in the lower part of the reservoir "inverted cone" is displaced upwards coming from below the water, which moves above and begins to block the gas-saturated interval in the upper part of the reservoir. Re-treatment well on this technology involve either the necessity of drilling previously installed cement bridge, or setting above the new cement bridge and the loss of the working gas-saturated interval. In addition, the operation for killing the well and installing a cement bridge can be accompanied by a decrease in well productivity.

Known technology of production of hydrocarbons, in which the well is introduced a gas-liquid mixture or foam, prigotavlivaemy at the wellhead by means of the ejector (Nankov B.A. and others, "improving the efficiency of operation of watering gas wells. Survey information. Series: Development and exploitation of gas and gas condensate fields, issue 13, Negatron, 1987, p.13-14). According to the technology adopted as a prototype, liquid the gas mixture or foam is pumped to periodically remove columns of water from the well, and can also be downloaded in the bottomhole formation zone with the purpose of forcing the water from the borehole bottom. For this to wellhead - column lift pipes and/or the annular space of the well - join wikid liquid-gas or liquid-gas ejector, the low-pressure chamber which reported either compressor or gas from an external gas source.

The disadvantage of the analyzed technologies is that the injection liquid-gas mixture enters at the same time and in obwodnica and oil/gas-bearing intervals that can adversely affect the flow of hydrocarbons from the reservoir after completion due to incomplete cleaning of the bottom zone of the injected mixture. In addition, there is no input in the liquid-gas mixture prior to its injection into the well of the emulsifier is a water-repellent agent.

The technical result of the invention is to increase the efficiency of the wells on the mineral deposits, the exploitation of which is complicated by the receipt of deposits in the water.

This technical result is achieved by the solution of the technical problem, aimed at extending the period of the wells after their treatments, as well as the possibility of re-treatment of Obvodnogo interval without killing just opened productive square is one hundred and resulting low productivity wells.

The technical problem is solved by a method for production of hydrocarbons from watering reservoir, including the use of the well and lowered her column lift pipes, injection into the reservoir of liquid or liquid-gas mixture, prepared with the use of a mixing device, wikid which communicated with the column lift pipes, and the camera low and high-pressure - source gas and/or liquid, the injection of liquid or liquid-gas mixture is performed in obwodnica the productive interval of the formation periodically, when produced well production limit water content, and the bottom hole in the annular space between the Elevator pipe and casing in the interval and above obwodnica productive part of the reservoir establish at least two packers, the annular space in the installation interval packers structured fill - non-Newtonian - fluid in the column lift pipes install two circulating valve: one - interval watering reservoir, and the second above the upper packer: before injection into obwodnica the productive interval of the formation liquid or liquid-gas mixture from this interval are undertaking the selection of products to appear in its composition of hydrocarbons selection of products from Obvodnogo is interval before pumping into the well a liquid or liquid-gas mixture is carried out at the maximum allowable pressure in the bottomhole formation zone to stabilize the ratio of volumes of selected hydrocarbons and water in injected into obwodnica interval liquid or liquid-gas mixture entering the emulsifier, making it more hydrophobic and making non-Newtonian properties; in waterproofing works in gas wells before selection of products from Obvodnogo interval have pumped the gas-saturated interval portions of liquid hydrocarbons.

The essence of the proposed method of production of hydrocarbons is that the injection of liquid or liquid-gas mixture is performed in obwodnica the productive interval of the formation periodically, when produced well production limit water content, and the bottom hole in the annular space between the Elevator pipe and casing in the interval above and within obwodnica productive part of the reservoir establish at least two packers, the annular space in the installation interval packers fill non-Newtonian fluid in the column lift pipes install two circulating valve: one in the range of Obvodnogo layer, and the second above the upper packer; before download in obwodnica the productive interval of the formation liquid or liquid-gas mixture from this interval are undertaking the selection of products to appear in its composition of hydrocarbons and, if necessary, from the EOS products of Obvodnogo interval is carried out at the maximum permissible pressure in the bottomhole formation zone to stabilize the ratio of volumes of selected hydrocarbons and water; in injected into obwodnica interval liquid or liquid-gas mixture entering the emulsifier, contributing to its waterproofing; waterproofing works in gas wells before selection of products from water-saturated interval have pumped the gas-saturated interval portions of liquid hydrocarbons.

The proposed solution is based on the periodic downloads in obwodnica interval of the production well hydrophobic liquid or liquid-gas mixture.

The essential difference of this method is that it allows to periodically re-treatment interval of Obvodnogo layer without blanking interval, which enters the bore of the hydrocarbon products; breed in the volume adjacent to the wellbore in the range of Obvodnogo layer, you can periodically gidrofobizirovan, to saturate the liquid or liquid-gas mixture in obwodnica part of the bottom-hole formation zone decreases permeability rocks by the water and simultaneously increases the viscosity of there environment. As a result, significantly impeded the penetration of water into the saturated hydrocarbon portion of the bottomhole zone of the formation.

The method is illustrated in the drawing. In the processing of the borehole 1, the operator sells the active layer, the upper part of which 2 are saturated hydrocarbons such as oil or gas, and the lower 3 flooded, perform the descent of the column lift pipes 4 with two packers - top 5, which is installed above the current KSS (or DDC), and the bottom 6, which is mounted within the water-producing interval 3, the annular space between the packers 5 and 6 are filled with high-viscosity or visco-plastic fluid 7; set column lift pipes two managed to mouth a circulation valve: top 8 placed above the upper packer 5 and the bottom 9 is placed below the lower packer 6; mounted on the wellhead 1 the mixing device 10 to obtain hydrophobic fine liquid or liquid-gas mixture, wikid from which with the help of pipes and shut-off and control devices 11, 12 is connected to the column lift pipes 4, the low-pressure chamber with the help of pipes and valves and devices 13, 14 - sources of gas or liquid low pressure and high pressure chamber through pipes and shut-off and control device 15 with a source of gas or liquid pressure. Install devices to measure and record the pressure and flow rate of the liquid and gas inlet and outlet of the mixing device 10 is not shown.

After installation of equipment and devices when you open the circulation valve 9 is closed circulation valve 8, and open shut-off and control devices 11, 12, 15, 13 and/or 14 and closed 16 serves the working environment, as well as the emulsifier-wetting agent for the preparation of hydrophobic mixture: liquid, gas/liquid to the mixing device 10, regulate within the specified limits, the cost of working fluids, and pressure at the wellhead in the column lift pipes so that the pressure at the well bottom in the interval obwodnica part of the productive formation was higher reservoir pressure by an amount providing income injected into the reservoir hydrophobic mixture with specified properties at the specified rate. The pressure at the bottom hole measured depth gauge. After injection into obwodnica part of the bottomhole zone of the estimated amount of hydrophobic liquid or liquid-gas mixtures and extracts the well to stabilize formed in the breed hydrophobic system close shut-off and control device 15, 12, 13 and/or 14 and the circulation valve 9 open shut-off and control device 16 and the circulation valve 8. Produce a smooth start-up of the well, if necessary, is injected into the annulus gas, foam or oil.

In the education in obwodnica part of the bottom-hole formation zone of a hydrophobic system, reduce the water saturation at the expense of forcing water Spustit breed while increasing the viscosity of the medium, saturating this volume compared to the viscosity was there water, significantly reduced the mobility of the environment, and in some cases, when the mixture becomes viscous-plastic properties, its movement will begin only after the limit pressure gradients. Due to this, in the near-wellbore zone, saturated hydrocarbons, for a long period is terminated or significantly impeded the flow of water from Obvodnogo interval of the productive formation. If necessary, re-processing can be easily implemented using the set in the well downhole equipment.

To improve efficiency and reduce costs hydrophobic mixture and energy on her cooking, and pumping before serving, mix in obwodnica part of the bottom-hole zone of the well is allowed in the work of obwodnica of the reservoir at the open shut-off and control devices 11, 16 and circulating valve 9 and the closed shut-off and control devices 12, 15, 13 and/or 14. In this case, obwodnica part of the bottom-hole formation zone act hydrocarbons from saturated hydrocarbons, newbudnudes part of the reservoir rock saturated hydrophobic hydrocarbon material, the quantity and quality of which change during subsequent pumping in this part of the bottom-hole formation zone of the Hydra is faabnoi mixture, obtained in the mixing device.

Using the proposed method provides the following benefits:

- provides for the management of waterproofing properties of obwodnica productive part of the reservoir without disconnecting the installation of a cement bridge and deterioration of the productive characteristics of saturated hydrocarbons, newbudnudes part of the bottomhole zone;

- provides the opportunity for re-waterproofing treatment of wells without killing newbudnudes interval of the productive formation of hydrophobic mixture;

- extended the period of operation of the well until the desired limit water content of produced fluids;

- reduced costs of repair and waterproofing work.

1. Method of production of hydrocarbons from watering reservoir, including the use of the well and lowered her column lift pipes, injection into the reservoir of liquid or liquid-gas mixture, prepared with the use of a mixing device, wikid which communicated with the column lift pipes, and the camera low and high-pressure - source gas and/or liquid, characterized in that the injection of liquid or liquid-gas mixture is performed in obwodnica the productive interval of the formation periodically, with the bottom hole in the annular space between the Elevator pipe and casing in the interval and above obwodnica part of the productive formation establish at least two packers, the annular space in the installation interval packers fill non-Newtonian fluid in the column lift pipes install two circulating valve: one within Obvodnogo interval of the reservoir, and the second above the upper packer.

2. The method according to claim 1, characterized in that before being pumped into obwodnica the productive interval of the formation liquid or liquid-gas mixture from this interval are undertaking the selection of products to appear in its composition of hydrocarbons.

3. The method according to claim 2, characterized in that the selection of products from Obvodnogo interval before pumping into the well a liquid or liquid-gas mixture is carried out at the maximum permissible pressure in the bottomhole formation zone to stabilize the ratio of volumes of selected hydrocarbons and water.

4. The method according to claim 1, characterized in that the injected in obwodnica interval liquid or liquid-gas mixture entering the emulsifier, making it more hydrophobic.

5. The method of claim 2, wherein when carrying out waterproofing works in the gas well before selection of products from Obvodnogo interval have pumped the gas-saturated interval portion of liquid hydrocarbons.



 

Same patents:

FIELD: oil-and-gas production.

SUBSTANCE: it is implemented preparation of injection well in insulated area by path close to roof cladding configuration of insulated area of stratum. Then it is pumped into it solution of foam maker with following feeding of gas for foaming. It is defined minimal horizontal lateral dimension of screen from conditions of filtration through the screen of gas and/ or water considering pressure gradient at the boundaries of screen at the period equal to period maximal pumping into gas storage or maximal permissible withdrawal of gas from particular storage. Minimal vertical dimension if screen is considered equal to value which is not less than maximal dimension from roof of formation up to gas-water contact in the area of screen creation. In preference it is implemented injection well making, path of which is normal to vector of average speed of formation fluid in isolated area of stratum. Preferentially it is also implemented making of inclined and/or horizontal injection well.

EFFECT: reliability growth of operating characteristics of screen, reduction of foam former consumption and gas amount, used for foaming and consumptions for wells drilling.

3 cl, 3 tbl, 1 ex, 3 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relate to oil exploration industry and can be used for formation water in-flow limitation. Composition producing method includes mixing of a water solution with carbon black, at that preliminary disperse carbon black in the methyl cellulose diluted water solution, at component ratio wt % : carbon black 15.0, methyl cellulose 0.05, the rest is water. Then mix received concentrated suspension with methyl cellulose water solution and carbamide at the following component ratio wt %: methyl cellulose 0.5-2.0, carbamide 2.0-20.0, carbon black 0.5-5.0, the rest is water. The composition of oil recovery rate increase characterised with the mentioned above method.

EFFECT: oil wells oil recovery rate increase due to reservoir physico-chemical treatment.

2 cl, 1 tbl, 24 ex

FIELD: oil-and-gas industry.

SUBSTANCE: invention related to oil-and-gas industry and can be used for water inflow into well limitation methods. According to the method execute high viscosity oil and cement heated mixture pumping via thermal insulated pipes, driving with low viscous oil and process ageing. According to the invention kill the well with well killing fluid, execute works until well specific intake capacity value is equal 0.5-3.0 m3/(h·MPa), pump into the well not less then 8 m3, with density equal well killing fluid density. Execute pumping though thermal insulated pumps of the high viscosity oil and cement heated mixture with consumption rate 2-10 m3/hour.

EFFECT: production wells water inflow insulation efficiency increase.

1 ex

FIELD: oil-and-gas industry.

SUBSTANCE: method of efficiency recovery and stand by wells, with collector of complicated design in abnormally low formation pressure conditions and production string bottom part collapse includes execution of repair-isolation works and reservoir opening. Sweep up the string, repair its compressed bottom, wash in a sand plug till depth of the nearest to a gas-water contact - GWC clay sub layer, descend in to the string a tail from casing pipes of a smaller diametre up to the sand plug head, with the tail head dislocation 20 m above of the reservoir roof, cement the tail with a cement slurry, leaving a cement barrel 1-2 m higher the tails shoe. After cement fixing - CFT drill the cement barrel, wash the sand plug up to the current GWC, through perforation holes with perforation interval 15-20 m3 of the water sealing composition, press it through 3-5 m3 of the cement slurry in to the reservoir, creating water sealing screen and stop over the defined height cement barrels sand plug. After the CFT execute perforation - hydro-sand-jetted or with powerful cumulative perforator - of the production string and the tail in interval over cement barrel head up to the reservoir roof and gas flow activation. The cement slurry contains portlandcement, superplastisiser C-3, polyvinyl alcohol, and polypropylene fiber.

EFFECT: well efficiency recovery and stand by wells operation start up reliability increase.

1 ex, 4 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production, particularly to production efficiency increase. The method includes pumping into reservoir, through injection wells system, into zones around wells tall oil with filler - dispor in amount 5-10% of the tall oil and continue watering.

EFFECT: reservoir input profile aligning, oil withdrawal reservoir watering efficiency increase.

2 tbl

FIELD: oil and gas production.

SUBSTANCE: invention is related to gas production industry, in particular to methods for isolation of bottom water influx in gas wells. In method for isolation of bottom water influx in gas wells, including lowering of oil well tubing (OWT), pumping of blocking polymer compound with previously identified value of structural viscosity in annular space, cement isolating substance along OWT, their pushing through with process fluid, lowering of OWT is done down water entry bed, additionally prior to pumping of blocking polymer compound, a low-viscous gel-forming compound is supplied into annular space, which contains the following components, wt %: sodium silicate of "Sialit 30-50" grade 50, liquid waste from process of electrochemical metal coating 0.8, water - the rest, adding the latter to water entry bed, and blocking polymer compound is added to gas-bearing bed, then they are pushed through by pumping of process fluid along OWT with annular space closed, blocking polymer compound is used with a value of structural viscosity that exceeds at least thrice value of structural viscosity of low-viscous gel-forming compound, for headers with high permeability they use polymer compound as blocking polymer compound with organic filler, containing the following components, wt %: lignosulphonate 5, calcium chloride 15, gas condensate 20, peat-alkaline filler 7, technical water - the rest, and for headers with low permeability - polymer compound with condensed solid phase, which contains the following components, wt %: calcium chloride 9, twice-substituted ammonium phosphate 11, water-soluble polymer 2, surfactant 1, technical water - the rest, at the same time volume of blocking compound is defined according to given calculation formula, and pumping of cement isolation compound along OWT is done in volume that exceeds volume of operational pipe in interval of water entry bed by 20%, at the same time pushing of cement isolation compound is started to be done with annular space open, and after it reaches bottom of gas bearing bed, it is pushed with annular space closed with pressure that exceeds pressure of absorption.

EFFECT: development of efficient method for isolation of bottom water influx in gas wells.

2 ex, 2 tbl

FIELD: oil and gas production.

SUBSTANCE: method of recovery of yield and bringing to operation of temporarily shut-in wells with complicated structure of collectors under conditions of abnormally low bed pressure including repair, insulating, and exposure of producing bed consists in following: initially, sand plug is washed for depth 2-3 m below current gas-water contact (GWC); producing string is callipered, shank end out of casing tubes of smaller diametre is lowered into producing string up to head of washed sand plug; head of shank end is arranged 20 m above top of producing bed. The shank end is cemented with cement grout; upon waiting-on-cement completion (WCC) two columns, the producing column and the shank end are perforated in interval below the first over current GWC clay interlayer to depth 2-3 m below current GWC. Water insulating composition at volume 15-20 m3 is pumped through perforated openings made for water insulation; composition is forced through into depth of the producing bed creating a water insulating screen with cement grout of volume 3-5 m3; a cement sleeve 1-2 m above the first over the current GWC clay interlayer is left at the bottomhole. Upon WCC perforating is performed for operation of two columns, the producing column and the shank end in interval above the second over the current GWC clay interlayer up to the top of the producing bed; gas discharge is initiated. Composition containing Portland cement, super-plasticiser C-3, polyvinyl alcohol and polypropylene fibre is used as cement grout; while for perforation either a high-power cumulative perforator or hydraulic jet are used.

EFFECT: insulating fluid entry, ensuring pressure tightness of producing column and additional gas withdrawal from earlier shut-in wells.

1 ex, 4 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to the oil industry, particularly to methods of processing strata of oil-fields, and can also be used for waterproofing oil wells and for regulating intake profile of intake wells. The method of processing oil-field strata involves pumping a composition into the strata, containing aqueous solution of an anionic polymer, water soluble inorganic or organic acid or a mixture of acids, aliphatic or aromatic alcohol or a product containing it, and a polyvalent metal salt. The said composition also contains a surface-active substance or a mixture of surface-active substances, fine-grained hydrophobic material FGHM and an inhibitor. Before adding polyvalent metal salt to the aqueous solution of anionic polymer, the said alcohol or product containing it, surface-active substance or mixture of surface-active substances, FGHM and inhibitor are added and pH of the reaction mixture is brought to 0.5-3.0 by adding the said acid or mixture of acids with the following content of components, wt %: water soluble anionic polymer 0.004-5.0, alcohol or product containing it 0.50-50.0, surface-active substance or mixture of surface-active substances 0.50-10.0, FGHM 0.1-3.0, polyvalent metal salt 0.003-0.30, inhibitor 0.1-3.0, water - the rest. The invention is developed in a subclaim.

EFFECT: more efficient processing of strata due to improvement of rheological and hydrophobisation properties of pumped compositions, as well as their oil-sweeping properties.

2 cl, 4 tbl, 4 ex

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil producing industry, particularly, to procedures of isolation and restraint of water production in horizontal boreholes of producing wells. The procedure consists in polymer pumping, in driving polymer solution, and in well shut-down for the period of polymer structure formation. Prior to pumping polymer solution into each interval, blocking fluid with optimal period of "life" is pumped into the well; further, specified volume of polymer is pumped into an isolated interval during this period of "life"; after the expiration of the period blocking fluid self-decomposes in volume required for filling the horizontal borehole from the bottomhole of the well to the nearest from the bottomhole boundary of interval of polymer solution treatment. Upon conditioning, decomposer of polymer is pumped into the well for the period of polymer structure formation in the latest treated interval; with water decomposer is further driven through into a reservoir to the nearest near-well zone and is conditioned there for the period of polymer decomposition.

EFFECT: increased efficiency of isolating water production in horizontal wells.

5 dwg, 1 ex

FIELD: mining.

SUBSTANCE: for actuation of said executing mechanism it is provided osmotic element. The osmotic element is placed into flow of fluid medium owing to which there is provided an effort and motion required for actuating executing mechanism on account of using the difference of values of osmotic pressure either between solution inside the osmotic element and external flow of fluid medium or in a layer containing this fluid medium relative to the said element. It results in corresponding displacement or adjustment of the valve, or regulating device, limiting inflow.

EFFECT: there is provided adjustment of process of reservoir drainage, consequently, water inflow into each section or into corresponding part of draining pipe is automatically regulated depending on amount of incoming water, owing to which water inflow is constantly maintained at minimal level.

10 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to production of oil, in particular - to production of oil with the help of elastic vibrations. The method involves placement of a downhole apparatus in the well at an operational depth which apparatus is connected to a ground-based power supply source of an industrial frequency and contains an ultrasonic transducer that provides for generation of high frequency elastic vibration, excitation of varied frequency elastic vibrations and subsequent recurrent impact of varied frequency elastic vibrations onto the oil reservoir. The impact is performed by high and/or low frequency vibrations. For generation of high and low frequency elastic vibrations two independent vibration sources are used. One of them is represented by at least a single radiating ultrasonic, mainly - magnetostrictional transducer while the second one is made as based on an electropulse device that provides for generation of low frequency elastic vibrations and is connected to the ground-based power supply source of an industrial frequency and includes, electrically interconnected, a charger, a unit of reservoir capacitors, a discharge unit equipped with electrodes and two switching devices with one of them providing for composition of individual reservoir capacitors to form a unified unit while the second performs switchover of the reservoir capacitors from one type of electrical connection to another connection type. High frequency elastic vibrations impact proceeds in the low frequency ultrasonic range, mainly - at a frequency of 18-44 kHz and in the constant and/or impulse mode with an intensity within the range of 1-5 W/cm2. Low frequency elastic vibrations impact proceeds at a discharge pulse repetition rate equal to 0.2-0.01 Hz and a discharge unit pulse energy equal to 100-800 joule. Supplied to the charger from the power supply source is a direct voltage whose value is set within the range of 300-150 V. Before reservoir capacitors unit charge one performs their composition to form a unified unit; the reservoir capacitors charging proceeds mainly with the capacitors connected in parallel and mainly during 20 sec till the required voltage value, the maximum threshold thereof assumed to be 20-27 kV. Before discharge of the reservoir capacitors unit providing for supply of its output voltage to the discharge unit electrodes all the reservoir capacitors or a part thereof are switched over to cascade electrical connection. At the same time high frequency elastic vibration impact proceeds under varying electrical and acoustic characteristics of the ground-based and/or downhole equipment and technological parameters of the oil production process.

EFFECT: improved efficiency due to an impact on the stratum being treated with performance of successive and/or alternating treatment of the hole-bottom zone and the active well zone with high and low frequency elastic vibrations.

31 cl, 7 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil and gas well drilling and completion, and can be used in hydrocarbon production or fluid pumping in a well. The device comprises a pipe equipped with a means of minimising sand ingress and a temporary partition primarily keeping and then passing a fluid flow through said means of minimising sand ingress, and a drilling tool with a rotating drill bit enabling the pipe to advance in the well while being drilled with the drill bit. The means of minimising sand ingress comprises at least one tubular member selectively pulled out in a radial direction and equipped with a screened pipe, while the temporary partition is mounted in the pulled out tubular member and designed so that when pulling out the tubular member from the pipe and filling the pipe on-the-site with a sealant supplied therethrough, the fluid flow is kept through the tubular member with the screened pipe, and after setting of the sealant, to pass the fluid flow through the tubular member with the screened pipe and the pipe.

EFFECT: invention provides well drilling and completion for fewer trips.

21 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: in compliance with inventions, heterogeneous mixtures are prepared and supplied to formation through at least one well. Phases of liquid and gas of various pressure are mixed with ejection, and certain volume ratio of phases and control of this ratio is reached. According to inventions, volume ratio of mixed phases is controlled and maintained with determination of their optimum ratio in mode of continuous monitoring with feedback along supply line with well injection capacity coefficient and depending on the depth of its perforation interval, structural geometric dimensions of system of casing pipes and tubing, pressures in liquid and gas phase supply line. At that, ejection at mixing is performed with automatic selection of active and passive phases along feedback line, and hydrodynamic instability of speeds and pressures in flows is created both at ejection and supply of mixture to the formation.

EFFECT: increasing efficiency of the method and enlarging functional capabilities of the device at decrease of material costs.

18 cl, 1 ex, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil-and-gas extraction industry and can be use at wells equipped with sucker-rod pumps. Substance claim: proposed method comprises fitting tubing string with sucker-rod pump and shank on rocks in dib hole, arranging the pump at maximum depth in well antinode tuned to one of the highest harmonics, that is, modes of the system natural oscillations, setting the pump plunger amount and stroke length proceeding from the well optimum rate of yield, pump operation and oil extraction from the well with simultaneous dilatation-wave stimulation of productive strata. In compliance with this invention, pipes for shank and tubing string are selected so that shank pipe cross section vs, cross section of pipes above said shank corresponds to shank length-to-length of tubing casing above the shank ratio.

EFFECT: increased reservoir recovery due to higher wave field intensity and stimulation effects.

1 ex, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to development of oil pools with oil-in-water systems. Method includes drilling, at least, one horizontal extracting and fill-in wells, injecting superseding agent through fill-in well and extraction of products through extracting wells. Extracting horizontal well is arranged parallel to oil-to-water contact at a distance that allows placing the well on production with waterless period. Fill-in vertical or horizontal well is arranged above extracting well in productive strata top of oil horizon and superseding agent is forced with specific weight lower than that of edge waters.

EFFECT: longer oil waterless production period, higher oil yield, higher efficiency.

2 ex, 2 dwg

FIELD: oil-and-gas production.

SUBSTANCE: device contains hollow casing with radial channels, partition with axial bore and branch forming chamber, connected to casing sub with saddle, mobile located in branch stepped hollow piston, globe valve, circular spring-loaded valve, installed in stepped hollow piston bypass valve. According to the invention on saddle of sub it is installed rest with spring-loaded support point. Lower the partition it is sealed installed relative to casing valve chamber of globe valve with radial and top angular channels, which is rigidly connected to stepped hollow piston and is implemented with ability of interaction of globe valve in bottom position to the rest. In chamber lower than stepped piston it is installed return spring. Spring-loaded circular valve is implemented with ability of interaction to casing at approximation of globe valve to the rest and sealed located in cavity of stepped hollow piston. In stepped hollow piston it is implemented channel with ability of communication of liquid out from circular spring-loaded valve with area of chamber over stepped piston and chamber is implemented sealed and is filled by neutral liquid.

EFFECT: ability of multiple hydroimpulsive impact on productive bed of well and pressure accumulation for its implementation.

6 cl, 2 dwg

FIELD: oil-and-gas production.

SUBSTANCE: method includes perforation of casing string in oil-saturated zone of producing stratum, installation of packer, installation in well of deep-well working barrel, pumping of oil from oil-saturated zone and sampling of strata fluid from well on surface. Perforation of casing string in oil-saturated area of producing formation is implemented with separation of producing formation for two part. It is installed packer at a distance from two to five metres higher than water-oil contact. Then it is installed deep-well working barrel of double-acting over producing formation so that suction valve of pump is located higher than installed packer in top part of producing formation. In the process of extraction of strata liquid part of withdrawn oil from top part of producing formation it is pumped into producing stratum lower than packer.

EFFECT: oil-extraction increasing, increasing nonaqueous operation period of well ensured by reduction of watering of extracted production, increasing of coefficient of comprehension by generation of oil stores, prevention of coning and reduction of incentive consumptions for extraction of oil ensured by overlap of function producing and injecting wells.

1 dwg, 1 ex

FIELD: oil-and-gas production.

SUBSTANCE: according to method it is drilled condensate pool system of extracting and injection points in version of horizontal and it is implemented on the basis of cycling-process. For prevention of watering of extracted products it is created area of increased pressure nearby gas-water contact ensured by location on height of not more than one of tenth from gas-saturated thickness of stratum over gas-water contact of horizontal bores of injection point. For excluding of negative impact of stratified heterogeneity of collecting properties and increasing coverage ratio and condensate-removing of stratum horizontal trunks of producing wells are located close to top, indenting from roof covering not more than one tenth from gas saturation thickness of stratum. After stopping of cycling-process each injection point is sequentially passed into byte of extracting. After its watering it is implemented liquidation of horizontal bend of bore by means of its cementation or installation of cement bridging. In inclined part of well trunk in producing formation is higher than horizontal bend is implemented perforation or other method is finished, or it is implemented predrilling of side offshoot nearby seam roof, departing from roof and not more than one tenth from gas saturation of stratum thickness. Then it is implemented operation of well in the capacity of extracting.

EFFECT: effectiveness increase of development of deposit of natural hydrocarbon gases with dissolved condensate, increasing of condensate efficient factor of stratum, prolongation of period of anhydrous gas production and condensate and reduction of risks from implementation of cycling-process at presence of active bottom water.

2 cl, 1 ex, 1 tbl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil-and-gas production field, and it is used in development of hydrocarbon deposits, complicated by availability of areas with different with different shaliness. Method includes sampling of oil through producing well, pumping of working agent through input well and sealing of wells mesh, drilled in the process of development. There are explored densities of drilling mud solutions, used at drilling of wells of initial mesh, and wells of compressing drilling, there are explored filtrational-tank behaviors of beds according to geophysic materials of the primary and following drilling and its possible changing from mudding of infused clay in the drilling process and at pumping of working agents, influencing on swelling of natural clay in bed. According to changing of porosity, strata pressure and productivity factor it is sustained conclusion about presence or absence of clay in borehole environment in the bed. According to sustained conclusion it is assigned working agent, operation of development and methods of increasing of recoverable oil.

EFFECT: increasing of deposit oil recovery.

1 ex

FIELD: oil-and-gas industry.

SUBSTANCE: invention related to oil industry and can be use for oil field development. execute oil withdrawal via production wells, working agent injection via injection wells, define product water content and, reservoir hydraulic fracturing. Define reservoir watering as a mean value of support wells watering or in wells with insulated water in-flow, compare with the well product watering. Built reservoir cross section detailed vector profile and analyse depth and homogeneity of a bridge between water caring of watered formation and the reservoir. If well watered more than reservoir mean watering assume, that well watering is equal to the reservoir mean watering. Execute reservoir hydraulic fracturing at formation mean watering less than 70%, at presents of homogeneous bridge between water caring of watered formation and the reservoir not less than 3 m.

EFFECT: invention provides possibility of reservoir hydraulic fracturing, in wells with water caring of watered formation cut off or underlying screens of a small thickness and highly watered product.

1 ex, 2 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes electro-hydraulic treatment of bed at resonance frequency and extraction of oil from bed. According to invention bed is excited by resilient pulses at broad frequency range from 0 to 10 kHz. Frequencies are set, at which bed is treated. Resonance frequency is kept by singular, periodical, radially focused electro-hydraulic pulses with generation frequency, divisible by bed resonance frequency. Concurrently in adjacent well bed excitation frequency is controlled by resilient pulses and corrected according to measurements results.

EFFECT: higher efficiency.

2 dwg

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