Method for intensifying influxes of oil and gas
 Method for increasing productiveness of oil and gas wells / 2247234Method includes acidic treatment of bed, calculation of hardness decrease and pressure of rocks tearing and pressure for pressing working solution into bed, completion of well and the actual hydraulic tear. Pressure for pressing is determined from formula Pht=(2μ·Pm/(1-μ)+(1-3μ)·Pb/(1-μ), where Pht - rocks tear pressure, Pm - mountain pressure, Pb - bed pressure, μ - Poisson coefficient. |
 Method for increasing coal and hydrogen yield of fuel bed / 2246611Method includes drilling long horizontal wells in bed and effecting on bed through them. Most of bed is covered by these wells. Along whole length of them explosive substance is placed to provide explosion temperature for length unit of well from 3500 to 1400 kcal/m and filling volume of horizontal wells by explosive substance from 5 to 20% during filling of remaining wells volume by liquid. After explosion, a packer is lowered into cased portion of wells. |
 Method for perforation and treatment of well-adjacent bed zone and device for realization of said method (variants) / 2245440According to accelerated variant, perforation of well-adjacent bed zone is performed by cased cumulative perforator. Adjustable pulse gas-dynamic bed fracturing is performed through apertures of perforator. It is provided with subsequent operation in given time of delay of main and additional gunpowder chambers. Thermal gas-chemical effect on well-adjacent zone of bed is provided for in given delay time of thermal gas-chemical chamber with charges. Implosion treatment is performed in given delay time of implosion chamber. Treatment is set by volume of implosion chamber and size of pass cross-section of flow aperture and/or group of apertures, connecting inner volumes of chambers. |
 Method for hydraulic fracturing of bed / 2244815Method includes lowering and mounting tubing string with packer in a well. Fracturing liquid is pumped into tubing string with certain speed and pressure, and hydro-impacts are formed. Before fracturing liquid a deep secondary opening of high-productive bed portion is performed. Column of tubing pipes with tail piece and cone in lower part is performed. Resilient-viscous compound is pumped into well and pushed to position of formed cracks. Fracturing liquid is forced into tubing pipe, while at starting period - at increased speed. Hydraulic impacts are formed by stopping fracturing liquid flow from the surface, and through same well bed products are extracted. |
 Fluid for hydraulic rupture of formation comprising block copolymer containing at least one water-soluble block and one hydrophobic block / 2244814Invention provides fluid comprising aqueous liquid and above-defined block copolymer, which is especially suitable within high-temperature ranges above 180оС. Viscosity of fluid is stable at high temperatures and fluid is capable of suspending and transporting proppants and nearly does not damage of formation and preserves its efficiency upon action of various chemical conditions. |
 Method of manufacturing high-strength ceramic granules / 2244695Invention relates to manufacture of molded ceramic materials for use as propping agent in production of liquid and gaseous fluids from bored wells. Method comprises briquetting and heat treatment of aluminosilicates kaolin at 1150-1250оС. Resulting mix is ground to average grain size 3-5 μm and loaded into granulator. Before granulation, 1.2-3.0% mineralizer and 5-10% plasticizer are added. Mix is moistened with dozed amount of organic binder and stirred to form granules. At the end of granulation, fired ground material for powdering granules is added in amount 1.2-3.0%. Granules are dried and screened to isolate desired fraction, which is subjected to final firing at 1370-1450оС for 30-60 min and then re-screened into commercial fractions. |
 Device for thermal effect on oil beds / 2247831Device has compressor machine and serially placed behind it screw pump, connected via pipeline to force well. Product well is connected to separator and collector, which is connected by water feed pipeline to compressor machine and pump. Gas space of separator is connected to input of compressor machine by gas feed pipeline. |
 Method for extraction of deposits of high-viscous oil and bitumen / 2247830Method includes cyclic differently-directed forcing of air as oxidizer. This is achieved by changing oxidizer forcing pressure and its volume, changing position of air forcing points, extraction of high-viscous oil or bitumen. Appearance of sign-alternating pressures between beds of different saturation provides for acceleration of capillary counter-flow saturation with water of zones with oil or bitumen, forcing gases into portions with oil or bitumen along small porous channels and transfer of oil or bitumen from heated areas along large porous channels. Change of direction of flows of gas of oil or bitumen between wells strengthens process of increase of area of effect of bed by bed inside burning. In such a way, use of stagnant areas is increased and bitumen extraction coefficient is increased. |
 Method for electro-thermal treatment of face-adjacent bed zone / 2247233Face-adjacent bed zone is heated by well electric heater and liquid is removed. Well is equipped with column of tubing pipes with perforated branch pipe at the end, separated by plug, with electric heater and pump below the plug. Branch pipe is positioned in zone of productive bed. Flow of liquid along inter-tubular space is limited by partial disengagement of inter-tubular well space at level of productive bed ceiling. Face-adjacent zone is heated with concurrent circulation of liquid along branch pipe below the cork and well space below disengagement location and feeding of water into inter-tubular space. Removal of liquid is performed with disabled heating and circulation of liquid. |
 Method for processing water for extraction of oil by thermal methods / 2247232Method includes first stages of capturing energy of processed heat from high pressure steam separator, placed below steam generators. Then transfer of heat energy into heated separator and evaporator and heat exchanger is performed for distillation of bed water present in oil-bearing bed and restoration of distillated water and concentrated salt solution or hard product. Concentrated water steam from heated separator is circulated through evaporator and heat exchanger to support from 1% to around 50% of steam mass in the flow, returning into heated separator, and prevent pollution and forming of scale. Equipment includes separator for processed low pressure energy, heated separator and steam compression with forced circulation circuit to produce distillated water. |
 Method for extracting deposits of viscous oils and bitumens / 2246001Method includes drilling two-mouth horizontal well, fixing thereof by operation column, dragged from one mouth along shaft to another mouth together with packers for mounting the latter in ceiling of productive well, raising and feeding oil to output line on one of well mouths. Mouth portions of operation column are interconnected by ground-based portion in form of arced pipeline with identical inner diameter with forming of closed channel. Said ground-based portion of the latter is fixed on support frame of driving assembly. For it an additional column is placed in operation column, performing a function of tubing pipe in underground portion and having perforation channels for connection to productive layer. In hollow of additional column at even spaces from each other a system of cylindrical elements is mounted, interconnected via force tractions with forming of closed traction system. Portions of tubing column underground portion from well mouths to limits of operation column perforation portion together with said cylindrical elements form piston pump couples. During operation forced displacement of cylindrical elements system by driving assembly is performed with continuous consecutive pressing of oil from tubing column via above-mentioned piston pump couples. |
 Oil deposits extraction complex / 2246000Device has force and product pipelines, column of thermo-isolated pipes, steam generator. Steam generator is made in form of system for feeding easily-boiling liquid. Said system contains thermo-isolated force pipeline with reduction assembly for adjusting amount and pressure of easily-boiling liquid and sprayer. Sprayer serves for dispersing easily-boiling liquid on smallest drops and forming foam of mixture of bubbles of easily-boiling liquid steam and oil from bed. Also provided is compressor for raising foam, cooling machine for transferring steam of easily boiling liquid to liquid state. Inputting pipeline is placed coaxially outside the force pipeline. Output of input pipeline is connected to separator input, and separator output - to cooling machine input. |
 Gravitational steam-power oil extraction method / 2245999Method includes inputting working environment under pressure along thermo-isolated pipeline into oil-bearing bed and extracting oil to the surface through inputting pipeline. As working environment easily-boiling liquid is used. It is fed along force thermo-isolated pipeline with reduction assembly and sprayer at end. Easily-boiling liquid is fed under pressure, enough for dispersing easily-boiling liquid on smallest drops and forming a foam of bubbles of easily-boiling liquid and oil from bed. It is fed into inputting pipeline placed coaxially outside force pipeline. Mixture of steam of easily-boiling liquid and oil is extracted to surface. Mixture is separated, oil is gathered, and steam of liquid is condensed for repeated use in well. |
 Method for formation of deep-hole charge / 2244900The method for formation of a deep-hole charge of a multi-component mixed explosive consists in impregnation of porous and crystal ammonium nitrate with liquid petroleum product and placement of the obtained explosive in the hole, formation of the mentioned deep-hole charge in its extension is accomplished with sections of various density of the explosive depending the physico-mechanical properties of the rocks located in the length of the hole, varying the density of the explosive by varying the mass percent relation of the quantity of granules of porous and crystal ammonium nitrate in the explosive compound, the mass percent of a granule of porous ammonium nitrate is within 54.5 to 71.5, a granule of crystal ammonium nitrate is within 20 to 40, liquid petroleum product - within 5.5 to 8.5, the granules of porous ammonium nitrate are used with sizes of 2.5 to 4.5 mm, and those of crystal ammonium nitrate - 0.7 to 1.3 mm, mineral oil is used as petroleum product. |
 Method for extraction of hydrocarbon deposit / 2244813Method includes drilling of well and following concurrent heat treatment of productive bed and treatment by pressure waves. Well is drilled in parallel to ceiling or soil of bed. Acoustic properties of system ceiling-bed-soil are examined. Bed oscillation frequencies are determined. Acoustic characteristics of system ceiling-bed-soil are determined and concurrently heat and pressure waves treatment is performed in frequencies range containing spectrum of frequencies in resonance with frequencies of bed oscillations. Length of well is selected divisible by integer number of waves, direction of which is perpendicular to ceiling or bed soil, appropriately to analytical relation. |
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Method for extraction of hydrocarbon deposit / 2244813 Method includes drilling of well and following concurrent heat treatment of productive bed and treatment by pressure waves. Well is drilled in parallel to ceiling or soil of bed. Acoustic properties of system ceiling-bed-soil are examined. Bed oscillation frequencies are determined. Acoustic characteristics of system ceiling-bed-soil are determined and concurrently heat and pressure waves treatment is performed in frequencies range containing spectrum of frequencies in resonance with frequencies of bed oscillations. Length of well is selected divisible by integer number of waves, direction of which is perpendicular to ceiling or bed soil, appropriately to analytical relation. |
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Method for formation of deep-hole charge / 2244900 The method for formation of a deep-hole charge of a multi-component mixed explosive consists in impregnation of porous and crystal ammonium nitrate with liquid petroleum product and placement of the obtained explosive in the hole, formation of the mentioned deep-hole charge in its extension is accomplished with sections of various density of the explosive depending the physico-mechanical properties of the rocks located in the length of the hole, varying the density of the explosive by varying the mass percent relation of the quantity of granules of porous and crystal ammonium nitrate in the explosive compound, the mass percent of a granule of porous ammonium nitrate is within 54.5 to 71.5, a granule of crystal ammonium nitrate is within 20 to 40, liquid petroleum product - within 5.5 to 8.5, the granules of porous ammonium nitrate are used with sizes of 2.5 to 4.5 mm, and those of crystal ammonium nitrate - 0.7 to 1.3 mm, mineral oil is used as petroleum product. |
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Gravitational steam-power oil extraction method / 2245999 Method includes inputting working environment under pressure along thermo-isolated pipeline into oil-bearing bed and extracting oil to the surface through inputting pipeline. As working environment easily-boiling liquid is used. It is fed along force thermo-isolated pipeline with reduction assembly and sprayer at end. Easily-boiling liquid is fed under pressure, enough for dispersing easily-boiling liquid on smallest drops and forming a foam of bubbles of easily-boiling liquid and oil from bed. It is fed into inputting pipeline placed coaxially outside force pipeline. Mixture of steam of easily-boiling liquid and oil is extracted to surface. Mixture is separated, oil is gathered, and steam of liquid is condensed for repeated use in well. |
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Oil deposits extraction complex / 2246000 Device has force and product pipelines, column of thermo-isolated pipes, steam generator. Steam generator is made in form of system for feeding easily-boiling liquid. Said system contains thermo-isolated force pipeline with reduction assembly for adjusting amount and pressure of easily-boiling liquid and sprayer. Sprayer serves for dispersing easily-boiling liquid on smallest drops and forming foam of mixture of bubbles of easily-boiling liquid steam and oil from bed. Also provided is compressor for raising foam, cooling machine for transferring steam of easily boiling liquid to liquid state. Inputting pipeline is placed coaxially outside the force pipeline. Output of input pipeline is connected to separator input, and separator output - to cooling machine input. |
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Method for extracting deposits of viscous oils and bitumens / 2246001 Method includes drilling two-mouth horizontal well, fixing thereof by operation column, dragged from one mouth along shaft to another mouth together with packers for mounting the latter in ceiling of productive well, raising and feeding oil to output line on one of well mouths. Mouth portions of operation column are interconnected by ground-based portion in form of arced pipeline with identical inner diameter with forming of closed channel. Said ground-based portion of the latter is fixed on support frame of driving assembly. For it an additional column is placed in operation column, performing a function of tubing pipe in underground portion and having perforation channels for connection to productive layer. In hollow of additional column at even spaces from each other a system of cylindrical elements is mounted, interconnected via force tractions with forming of closed traction system. Portions of tubing column underground portion from well mouths to limits of operation column perforation portion together with said cylindrical elements form piston pump couples. During operation forced displacement of cylindrical elements system by driving assembly is performed with continuous consecutive pressing of oil from tubing column via above-mentioned piston pump couples. |
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Method for processing water for extraction of oil by thermal methods / 2247232 Method includes first stages of capturing energy of processed heat from high pressure steam separator, placed below steam generators. Then transfer of heat energy into heated separator and evaporator and heat exchanger is performed for distillation of bed water present in oil-bearing bed and restoration of distillated water and concentrated salt solution or hard product. Concentrated water steam from heated separator is circulated through evaporator and heat exchanger to support from 1% to around 50% of steam mass in the flow, returning into heated separator, and prevent pollution and forming of scale. Equipment includes separator for processed low pressure energy, heated separator and steam compression with forced circulation circuit to produce distillated water. |
FIELD: oil and gas industry.
SUBSTANCE: method includes cyclic forcing of cooling mixture into well-adjacent zone of bed and its freezing-unfreezing with following cumulative perforation, while as components of cooling mixture the following reagents are used: water - 68.3 % mass; ammoniac - 19.2 % mass; saltpeter - 12.5 % mass.
EFFECT: higher productiveness.
1 tbl
The invention relates to the oil and gas industry, in particular to the field of stimulation of hydrocarbons.
Known methods of stimulation and increase filtration characteristics of the wellbore zone (PPP) by produce in acid solutions [Shalimov VP, Putilov F, Ugolev B.C., Yuzhaninov M. Physico-chemical methods of increasing the productivity of wells. - M.: UNIING, 1974; V.P. Mineev, Sidorov N.A. Practical guide to test wells. - M.: Nedra, 1981. - .183-207].
The disadvantage of these methods is the low efficiency because of the inability to inject acid solution in low-permeability reservoirs. In addition, in the presence of high heterogeneity processing affects only high-permeability difference that, as a rule, does not give a significant increase in production wells.
The objective of the invention is to develop a method of stimulation of hydrocarbons, ensuring its effectiveness due to the formation of cracks both in high and in low-permeability portions of the formation, which leads to higher productivity wells.
Technical result achieved is to develop a method for the stimulation of hydrocarbons, providing a large filter surface and increasing the productivity of wells.
Analogues of the solution to increase the filter surface and, consequently, the productivity of wells, was not found. However, it is known that the process of freezing and then thawing reduces the strength of the rocks, their partial destruction and, consequently, increase the filter surface due to the violation of a previously formed structural relations [Ershov ET Cryolithogenic. - M.: Nedra, 1982. - S-148].
Cooling of the mixture system of two or more solid or solid and liquid substances which, when mixed is lowering the temperature of the mixture due to the absorption of heat during melting or dissolving the components. This process is reversible, since the transition of the liquid phase in the frozen state in the future accompanied by thawing, i.e. it respects the principle of Carnot cycles” [the great Soviet encyclopedia, Moscow, 1977].
In accordance with the second law of thermodynamics for reversible processes thermal state of the system is expressed in equation
where, dS is thermal coor is inate system state-entropy;
- the quantity of heat.
In the proposed phase transformations heat reservoir will be absorbed frozen part and due to this will be the process of thawing.
The cyclical nature of the works and the application of cooling the reagents will allow high-permeability zone of the formation during the formation of cracks to connect with low permeability that will increase the filter surface and the productivity of the well.
The table presents the results of laboratory studies on the change in the permeability of rocks in the freezing process. The experiments were carried out on samples of rocks with different permeability from fields in Western Siberia.
The experimental method is as follows.
The sample core was extracted, dried and saturated model (With=20 g/l) produced water under vacuum. Then the sample was placed in the installation wipk-1M, measured relative permeability by formation water and dented cooling the mixture.
As the cooling of the mixture took composition consisting of ammonia 19.2%, and nitrate 12.5% and water to 68.3% (see table).
The sample was removed from the installation wipk-1M and was placed in a tub with formation water (model). After unfreezing operation is repeated. After the third operation most about ascov collapsed. After each operation was measured permeability by formation water.
The technical result obtained using the invention allows to make a conclusion about conformity of the invention the criteria of “inventive step”.
The technology works well is the following.
Before working permit tubing to the bottom holes of the perforated interval of the reservoir and produce a straight flush well for 2-3 hours for pre-cooling the borehole bottom. Then prepare an aqueous solution, cooling the mixture, direct flushing take him to the perforated interval of the reservoir and through the tubing under pressure (not higher than the pressure of the fracturing) push in the PPP to freeze.
The volume of the injected composition is determined proceeding from the actual conditions of the well (1 m3a mixture of 1 m of the effective thickness of the reservoir). 4 hours after produce mixture in the PPP to develop well. Thus by reducing the back pressure on the reservoir begins the process of destruction of the frozen zone of the reservoir. Surgery to freeze repeat three times. After the last freezing cycle is repeated perforation formation. This impact is due to the difference of the changes of thermal stresses cause new fractures in the reservoir, resulting in increased filter surface and p is poizvoditelnosti wells.
The use of the present invention will create a large filter surface in the reservoir and increase the productivity of oil and gas wells.
The method of stimulation of oil and gas, including the injection of the working agent in the near-wellbore area of the formation and freeze-thawing,characterized in that as a working agent used coolant mixture consisting of an aqueous solution of ammonia and nitrate in the following ratio, wt.%:
Ammonia 19,2
Nitrate 12,5
Water 68,3
and its produce injection cycle, and after the last injection, re-perforation of the formation.