easuring temperature or pressure (E21B47/06)

ethod of gas dynamic investigation of well for low-permeability reservoirs // 2641145
FIELD: oil and gas industry.SUBSTANCE: method of gas dynamic testing of wells for low-permeability reservoirs comprises measuring Qi and bottomhole pressure Pbi of investigated well at n different modes in the i-th, where i=1, 2, 3, …n at arbitrary time intervals τi, between the i-th and the initial research modes. Formation pressure for investigated well is determined at arbitrary moments of time by measuring formation pressure in nearest well located under observation located in the drainage zone of investigated well.EFFECT: increased efficiency when carrying out gas-dynamic tests due to reduced cost of working time for conducting investigations and improved accuracy of obtained results.2 dwg, 2 tbl
Fiber-optic probing of drilling string bottom hole assembly // 2636989
FIELD: mining.SUBSTANCE: control system of bottom hole assembly of the drilling string comprises bottom hole assembly comprising one or more drill pipes and a drill bit connected to one or more drill pipes, and a system of sensors for monitoring the BHA, containing: one or more sections of optical fiber, a signal source module comprising an optical signal source arranged to emit an optical signal into one or more optical fiber segments, a signal detection module comprising an optical signal receiver arranged to detect an optical signal, a signal processing module which contains an electronic processor which is directed from the signal source module along one or more sections of optical fiber and which is capable of communicating with the detection module, and an operator's console or interface configured to communicate with the signal processing module. At that the signal processing module is programmed so that during the operation of the system: is determines the measurement data based on detected optical signal of thermomechanical properties at a plurality of different locations on one or more drill pipes, while the BHA is used to drill a well and send a signal to the operator's console or interface when the measurement data exceeds the threshold value.EFFECT: maintenance of downhole tools within safe operating limits.27 cl, 8 dwg

Pressure sensor with mineral-insulated cable // 2636272
FIELD: measuring equipment.SUBSTANCE: pressure-measuring system (10) is created. The system (10) comprises the pressure measurement probe (16) sliding in the process fluid medium and having the pressure sensor (50) with the electrical specification, which varies along with the process fluid medium pressure. The mineral-insulated cable (18) has the metal sheath (30) with the far end, which is attached to the pressure measurement probe, and with the near end. The mineral-insulated cable (18) comprises plenty of cords (34, 36) that pass in the metal sheath (30) and are separated from one another by the dry electroinsulated mineral (58). The safety member encircles the pressure sensor and protects the pressure sensor from the process fluid medium. The metal sheath near end is capable of the pressure tight attachment to the tank (14) with the process fluid medium.EFFECT: opportunity to work in very high temperatures, absence of necessity to use the glass, metal seal.28 cl, 6 dwg
ethod for mapping izobar lines for oil and gas condensate fields // 2634770
FIELD: oil and gas industry.SUBSTANCE: use results of hydrodynamic studies and production data for all wells that is entered to the relevant databases. In addition to them, the means of the telemetry systems of group of gas wells in real time are produced with a given sampling interval of measurement: the wellhead pressure Pu.i, wellhead temperature Tu.i, gas flow rate Qi, and recorded to the database of the production control system (APCS or Information Management System). For all these data, the system daily determines the daily average values of the measured parameters and also records them to the database, and also daily using the average daily values of the parameters Pu.i., Tu.i, Qi and wells design data, calculates the values of the bottomhole pressure Pb.c and formation pressure Pf.c which are also recorded to APCS or IMS database. According to the issued command for izobar mapping the production control system using the above-mentioned data stored in its database produces an izobar map for any date indicated in the task in the automatic mode.EFFECT: use of the invention increases efficiency and accuracy of izobar mapping with the reduction of process labour intensity due to the maximum automation of all its operations.1 cl
ethod for determining methane bed pressure and sorption parameters of coal bed // 2630343
FIELD: mining engineering.SUBSTANCE: method includes drilling a bed well, sealing its collar, measuring the pressure and production rate of methane during the closure and opening stages of the well, verifying sorption parameters in the theoretical model of methane mass transfer with pressure and methane measurement data. After steady production rate of methane is reached, water is injected into the well at a pressure of 10…15 MPa, the well collar is closed during water and methane pressure stabilization period, then after the outflow of water from the well the current methane production rate is measured. The value of the steady water pressure is determined by the upper limit of the methane bed pressure, and according to the measurements of the methane production rate before and after the hydroprocessing, the sorption parameters of the coal bed in initial and wet conditions are verified.EFFECT: increased reliability and efficiency when determining methane bed pressure and sorption parameters of coal bed in initial and wet conditions.2 cl, 3 dwg, 4 tbl

Recovery method of high-viscosity oil deposit by steam cyclic effect // 2624858
FIELD: oil and gas industry.SUBSTANCE: in the recovery method of the high-viscosity oil deposit by the steam cyclic action, drill the horizontal well in the lower quarter of the oil-filled formation thickness, the fracturing pressure in the carbonate rocks is determined by conducting the testing injection, and in the terrigenous rocks by the reservoir mini hydraulic fracturing. Then at the wellhead, the pipe string is equipped from the bottom up: with the screen liner, the pump, the relief valve, bypassing from the pipe string to the in shell space, the expanding packer, after that the pipe string is lowered into the well so, that the expanding packer is placed opposite the roof of the reservoir with high viscosity oil. The expanding packer is set in the well, then at the wellhead the discharge line for the coolant injection is tied to the mixer, the steam generator and the pump unit. The two-component mixture is used as the coolant, it consists of the steam with the temperature of 200-220°C, with addition of the light hydrocarbon at the rate of 1l of light hydrocarbon per 5 kg of steam, provide the steam cyclic action by the two-component mixture, prepared at the wellhead to the reservoir with high-viscosity oil for 15 days with the open relief valve, then the process is held for 7 days for impregnation with the closed relief valve, then the preheated oil is selected up to the production decline up to the cost effective value for the given well, after that the cycles are repeated.EFFECT: increase of the efficiency and quality of steam-thermal effect on the reservoir with high-viscosity oil, reservoir properties keeping, reduction of the heat losses during the method implementation.3 dwg, 2 tbl
ethod of early gas ingress detection in horizontal wellbore drilling in broken-down cavernous carbonate reservoirs // 2620690
FIELD: oil and gas industry.SUBSTANCE: in the method implementation, a bottom-hole pressure sensor is installed in the intertubular well space, the bottomhole pressure is monitored under full mud absorption conditions. By increasing the bottomhole pressure by more than 0.5 MPa, the event is set of gas outlet start from the formation into the horizontal bore.EFFECT: reduced time spent in gas ingressed liquidation, increased safety.2 dwg

Borehole pump unit // 2619302
FIELD: oil and gas industry.SUBSTANCE: device contains a submersible pump with a submersible motor, installed in the borehole at the pipe string. The electric power cable passes along the pipe string, connected at the surface to the submersible unit operation control station with state parameters sensors, such as pressure and temperature and sensors signal conversion unit, mounted on the pipe string in the sealed instrumental compartment. The power cable is connected to the submersible motor and submersible instrumental module. The outer surface of the instrumental module is formed with the variable cross section and forms with the borehole casing string inner wall profile the Venturi tube. There are the pressure taps of the overflowing borehole fluid at the tube neck and the diffuser between the casing string inner wall and the outer surface of the instrumental module. The pressure taps are connected to the differential pressure gauge, installed in the sealed instrumental compartment and connected to the signal conversion device. By means of this device it is possible to calculate the flow rate of the borehole overflowing fluid between the inner wall of the casing string and the outer surface of the instrumental module based on the differential pressure gauge.EFFECT: functionality expansion of the submersible instrumentatal module of borehole state parameters sensors, installed together with the submersible pump by allowing more accurate measurements.1 dwg

onitoring borehole indexes by means of measuring system distributed along drill string // 2613374
FIELD: drilling soil or rock.SUBSTANCE: group of inventions relates to drilling operations, particularly, to distributed underground methods of measurements. Method of monitoring borehole indexes in a well passing through a formation includes placement in the well of a connected pipes string forming a borehole electromagnetic circuit ensuring creation of an electromagnetic signal channel between multiple sensors in the connected pipes string. Received through the borehole electromagnetic circuit is data from the first sensor of the said multiple sensors. Received through the borehole electromagnetic circuit is data from the second sensor of the said multiple sensors, which is located at a distance in the longitudinal direction from the first sensor in the connected pipes string. Compared are data of the first sensor and data of the second sensor. Conclusion is made on a borehole index basing on data from the sensors. Controlled is the borehole index basing on the said comparison by selective adjustment considering the said output of at least one parameter affecting the said borehole index. Herewith the selective adjustment of the said at least one parameter is performed unless the said borehole index corresponds to the target borehole index within a given range of errors.EFFECT: higher accuracy of obtained data and higher efficiency of controlling a borehole index or a borehole parameter basing on the obtained data.28 cl, 27 dwg

Reservoir fluid lifting unit // 2612410
FIELD: oil and gas industry.SUBSTANCE: invention relates to the hydrocarbons extraction from small diameter wells using submersible electric centrifugal pumps equipped with a thermal manometric system (TMS). The reservoir fluid lifting unit contains a submersible electric motor with a seal section and a power cord, a pump, a control station with a frequency converter, a tubing and a TMS system with a hydraulic line. TMS is installed over the submersible electric motor and is connected to it via a detachable docking unit. The power supply cable is passed through the TMS. To prevent liquid leakage in case of hydraulic line interruption, the TMC is equipped with a valve.EFFECT: invention allows to mount equipment on the well, reduce radial dimensions and increase the unit reliability.5 cl, 1 dwg

Single packer pump facility for fluid production from two well formations // 2611786
FIELD: mining.SUBSTANCE: facility comprises a lift pipe string installed in the casing pipe, wellhead and two sections mounted in the casing pipe with a fitting assembly. The lower section contains a double-armature packer with a facility receiving fluid from the lower formation, where the upper section - a submersible motorized pump with submersible telemetry unit (STU) joined with the frequency-controlled submersible electric motor (SEM) of the submersible motor-driven pump, motorized throttle valve with a shutter and shut-off valve seat connected mechanically and electrically with the STU with measuring means of one or more formation parameters including pressure measuring sensor, and is provided with a centering part to connect fitting assembly part of the upper section toits return past at the lower section. Shutter-by-wire throttle valve is configured to cut off automatically fluid flow from the lower formation in the shut-off valve seat in case of emergency power cutoff of the well. The facility is equipped with a telemechanical system (TMS) with automatic control of a submersible electrically driven pump and a throttle valve after measuring formation parameters; the system comprises at least another pressure measuring sensor and a facility to register fluid proceeds from the lower formation installed at the entering point of the fluid from the lower formation to the shut-off valve seat of the throttle valve, and a facility of the cumulative registration of the fluid production from both well formations mounted at least at the outlet of motor-driven, electrically connected to the well control station and the unit receiving and processing information with one or more conductors of electrical cable installed inside STU through pump motor windings and the wellhead.EFFECT: design simplification and well operation reliablity improvement.3 cl, 1 dwg
ethod for operational control of technical state of gas and gas condensate wells // 2607004
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil and gas industry and can be used in development of gas and gas condensate deposits. Method involves standard gas-dynamic well survey on standard filtration modes with construction of relationship between wellhead parameters (pressure and temperature) and pressure at well bottom from gas flow, monitoring conformity of values of wellhead parameters recorded during operation to value of parameters defined by relationship, constructed according to results of gas-dynamic survey (GDS) at current gas flow rate. Pressure is monitored in annular space of well by means of pressure sensor installed on well and based on readings of which with specified sampling period, using a barometric formula, automated system for process control efficiently models bottom-hole pressure and compares it to value of bottom-hole pressure, defined by relationship, constructed according to results of GDS at current gas flow rate. Rapid modelling of bottom-hole pressure and its dynamics is performed using results of actual measurements of gas flow produced with specified sampling period. Rapid modelling of pressure losses in well shaft is determined from results of actual measurements of bottom-hole pressure, its characteristics and current parameters of produced fluid.EFFECT: present invention enables to efficiently monitor technical condition of wells, which improves industrial safety during operation.3 cl

ethod of measuring soil temperature // 2597339
FIELD: thermometry.SUBSTANCE: invention relates to thermometry, namely to a field determination of soils temperatures, where it is required to obtain specific data on the temperature of frozen, freezing and melting soils. Method of measuring soil temperature with the help of a measuring string lowered into the thermometric well. Herewith the casing pipe of the thermometric well represents a tube made from a material with relatively low heat conductivity coefficient (for example, polypropylene) with parts from a material with relatively high heat conductivity coefficient (for example, steel bushings), while the measuring string represents a tube having an outer diameter equal to the inner diameter of the casing pipe and similar in design, in which to metal parts thermocouples are attached for measuring temperature.EFFECT: technical result is higher accuracy of measurements, elimination of air convection in the thermometric well during the measurement.1 cl, 2 dwg

Investigation method of hydrocarbon deposits // 2597239
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil industry and can be used in developing an oil deposit by thermal methods, in particular when providing in-situ combustion (ISC). Method involves pumping into at least one injection well together with the uploaded agent of a mixture of at least two tracer agents of different heat resistance in the required ratio and concentration. Then recording the concentration of each tracer agent in at least one production well. After that by the change of proportions (relative ratios) of the tracer agents in the wells product relative to their proportions in the injected mixture a temperature and dimensions of the zone of thermal effect or combustion are evaluated.EFFECT: technical result is increased information value of the analyzed object of development, determination of temperature in the zone of thermal effect, in particular, in the combustion zone at ISC for optimizing the mode of an oxidizer and/or a heat carrier and/or a displacement agent uploading into the bed.5 cl, 3 tbl, 2 dwg

ethod of determining temperature permafrost rock mass around well and in-well fluid temperature // 2588076
FIELD: oil and gas industry.SUBSTANCE: invention can be used at establishment and operation of deposits in area of perennial frozen rocks distribution. In method connection of vertical heat flow in well with horizontal heat flow from well into rocks is taken into account: how oil is cooled down during lifting from bottom to head, how rocks are warmed (melted) around well, based on this complex integro-differential condition at boundary of well and mine rocks is obtained. Temperature field of rocks is determined by numerical simulation. Temperature field in well fluid is found based on solving of heat flow equation.EFFECT: higher prediction accuracy of thermal state of frozen rocks at well operation, id est defrosting radius around well and calculation of oil temperature in well.1 cl, 1 dwg

ethod of formation testing in managed pressure drilling (optional) // 2585780
FIELD: mining.SUBSTANCE: invention relates to a formation testing in managed pressure drilling. A method of testing an earth formation can include incrementally opening a choke while drilling into the formation is ceased, thereby reducing pressure in a wellbore, and detecting an influx into the wellbore due to the reducing pressure in the wellbore. Another method of testing an earth formation can include drilling into the formation, with an annulus between a drill string and a wellbore being pressure isolated from atmosphere, then incrementally opening a choke while drilling is ceased, thereby reducing pressure in the wellbore, detecting an influx into the wellbore due to the reducing pressure in the wellbore, and determining approximate formation pore pressure as pressure in the wellbore when the influx is detected. Drilling fluid may or may not flow through the drill string when the influx is detected. A downhole pressure sensor can be used to verify pressure in the wellbore.EFFECT: technical result is an increase in the efficiency of formation testing.28 cl, 4 dwg

ethod of determining behind-casing fluid flow by active thermometry in wells, covered by tubing strings // 2585301
FIELD: oil industry.SUBSTANCE: invention relates to oil industry and can be used for determination of behind-the-casing fluid from formations covered by tubing string. Method involves recording of thermograms before and after short-term local heating of casing string in assumed interval of fluid flow by recording of temperature in well bore with their subsequent analysis. At that, pumping and compression pipe from fibreglass is lowered with outside temperature sensors in selected interval analysis, that is followed by induction heating of casing string through fibreglass tubing for time interval defined by mathematical expression, and temperature is recorded in time in process of local short-term heating column and in well bore in investigated interval during well operation, and inter-string flows interval is determined from increased rate of temperature change.EFFECT: high reliability of determination of inter-string flows in wells covered by tubing string.1 cl, 1 dwg
ethod for disposal of co2 (versions) // 2583029
FIELD: ecology.SUBSTANCE: group of inventions intended for use in underground storage of CO2 and other harmful gases, as well as environmental protection. In first version of method for pumping CO2 trap of water-bearing formation with thermo-baric parameters promoting prolonged burial of CO2 in liquid state is selected. Wells are drilled in dome part of trap structure. Liquid CO2 is pumped in central well and in lowering of contact of “liquid CO2-water” CO2 is pumped to peripheral wells. Control of formation pressure dynamics with simultaneous monitoring of occurrence of liquid CO2 in observation wells. Pumping of liquid CO2 is terminated when detecting of it in observation wells, as well as when trap pressure corresponding to maximum allowable formation pressure is achieved. Control of lateral tightness of trap is carried out by means of observation wells located near closing contour line of trap, and in trap vertical line is by control wells arranged on overlying beds. In second version of method gaseous CO2 is pumped. At same time dynamics of reservoir pressure is controlled using bottom hole pressure gauges. When pressure in trap reaches value corresponding to liquid aggregate state of CO2, pumping of CO2 is continued already in liquid state in near-contact trap areas, controlling dynamics of reservoir pressure using bottom hole pressure gauges.EFFECT: high reliability of storage and reduction of costs for its creation.2 cl, 6 dwg

Device for monitoring parameters in operation of intelligent well // 2581852
FIELD: oil and gas industry.SUBSTANCE: invention relates to pressure and temperature monitoring device for smart gas and gas condensate wells. Device includes submersible equipment and surface equipment connected to downhole equipment. Submersible equipment comprises optical temperature and pressure sensor arranged in holder and equipped with submersible fibre-optic cable, and surface equipment comprises processing system, control and data storage of constant temperature and pressure monitoring, equipped with ground fibre-optic cable connected by means of tight coupling with submersible fibre-optic cable, and including operator post and optoelectronic unit for processing information of temperature and pressure constant monitoring and having possibility of interaction by means of wireless communication with operator station providing control and storage of temperature and pressure monitoring parameters, wherein optoelectronic unit is installed in protective housing equipped with heating and air conditioning systems and independent power supplies.EFFECT: technical result is high reliability and operational qualities of device.1 cl, 3 dwg

Design of coastal multi-hole intelligent gas well for development of offshore deposit // 2580862
FIELD: oil and gas industry.SUBSTANCE: invention relates to the oil and gas industry, namely, the production of gas in the operation of ships and offshore, including the Arctic zone. Design includes a well drilled from the coastal zone of the main trunk with vertical portion, obliquely directed portion and the horizontal leg, ending in the reservoir. Upper part of the main borehole is equipped technical columns and placed them in the production string. This well equipped for the operation of the composite tubing. Vertical section of the main trunk traced to the level of the bottom of the sea. Obliquely directed portion of the main section is formed with deviation from the vertical in the range of up to 80 degrees. Horizontal section is laid under the bottom of the sea with a long, providing drilling-deposits offshore field in the desired design point. End of the horizontal section of the main trunk laid along the longitudinal axis of the reservoir offshore field in the horizontal direction parallel to the roof of the productive layer, perpendicular to the horizontal section above the gas-contact. Front end of the main bore of the main trunk on the same productive stratum laid horizontally sidetrack directed in opposite direction from the end of the horizontal section of the main trunk. End of the horizontal wellbore and sidetrack equipped with shanks filters. Component production tubing is provided with an underground well equipment. Well equipped located at the end of the horizontal section of the main trunk and lateral trunk and built-in flow meters downhole cameras with pressure and temperature sensors, and the Christmas tree wellhead well equipped with actuators adapted to control.EFFECT: improve productivity and increase gas production by expanding the area draining the productive formation and increase information content of the extraction of gas from the main and lateral stems.2 cl, 3 dwg

ethod for determining profile of water injection in injection well // 2580547
FIELD: oil and gas industry.SUBSTANCE: water is injected into the first injection well according to the method for determination of water inspection profile. Water injection into the well is stopped. After the first well period the second injection of water into the well is performed. Volume of injected water is by three-five times larger than the volume of water in the well within the range of absorption. Water injection into the well is stopped. By means of temperature sensors temperature profiles in the range of absorption are recorded during the whole period of the second well period. After the second well period the third water pumping into the well is executed. By means of temperature sensors temperature profiles in the range of absorption at initial stage of the third injection are recorded. Temperature profiles are analysed, recorded during the second well period. Boundaries of absorption zones are defined. Temperature profiles are analysed, recorded at the initial stage of third injection, and the profile of water injection is determined.EFFECT: high accuracy of determining profile of injection using non-stationary thermometry of well.3 cl, 13 dwg

Logging system for use in well under submersible electric-centrifugal pump // 2572496
FIELD: oil and gas industry.SUBSTANCE: device comprises submersible electric-centrifugal pump and eccentric stabiliser and a nozzle with flowing channels for fluid passage are mounted on it, a cable, the upper and lower connecting elements with spring stops having contact with the cable and automatic gripper with gripping mechanism. At that the run in automatic gripper ensures connection or disconnection of the upper and lower connecting elements. The invention also suggests the logging method in the zone under submersible electric-centrifugal pump, which comprises in the well submersible electric-centrifugal pump unit assembled with the nozzle with flowing channels for fluid passage, eccentric stabiliser, the upper and lower connecting elements in position of mechanical and electrical contact, the cable, automatic gripper, weighting material and logging device at the cable downstream the submersible electric-centrifugal pump; start-up of the submersible electric-centrifugal pump in operating mode; disconnection of the upper and lower connecting elements by repeated one-time load of the automatic gripper mechanism; run out of the cable together with the logging device accompanied by measurements performed by the logging device in the well zone under the submersible electric-centrifugal pump.EFFECT: improved operational reliability of the submersible electric-centrifugal pump unit and potential periodic monitoring of the operated well without pump stop.13 cl, 3 dwg

Downhole pressure control method based on control theory with prediction models and system theory // 2570687
FIELD: oil and gas industry.SUBSTANCE: downhole pressure control method based on control theory with prediction models and system theory is referred to downhole pressure control technologies. This method includes: determination of downhole pressure, standpipe pressure, casing pressure, injection rate and output flow in process of well construction, and determination of available overflow or loss. Besides, when overflow or loss is unavailable fine adjustment of casing pressure at well mouth is carried out in compliance with low fluctuations of downhole pressure, standpipe pressure or casing pressure in order to ensure set pressure value of bottomhole pressure, standpipe pressure or vertical casing pressure. Besides, when overflow or loss is available a dynamic model of single-phase or multiphase flow is used in the well bore in order to simulate and compute location of overflow or loss and time of overflow or loss commencement. This method includes additionally: prediction of downhole pressure changes in future in process of well drilling and usage of optimisation algorithm to calculate control parameter that ensures minimum deviation of actual downhole pressure from the preset value in future. Optimisation process is repeated for the next time period upon selecting and setting of the first control parameter.EFFECT: downhole pressure control within permitted range of fluctuations according to design requirements thus implementing highly accurate pressure control.7 cl, 4 dwg

Borehole pressure determination method // 2569522
FIELD: oil and gas industry.SUBSTANCE: within the whole period of the well survey the borehole pressure determination method includes measurement of temperature at least at one point during the whole period of the well survey, definition of non-standard temperature profiles along the borehole during the whole period of the well survey, calculation of density change in the well fluid and measurement of tubing string length in the shut-in well and correction of measurement results of borehole pressure based on calculated change in the well fluid density and tubing string length.EFFECT: improved accuracy of borehole pressure determination.5 cl, 6 dwg

Smart gas and gas condensate well and method of its rigging-up // 2568448
FIELD: oil and gas industry.SUBSTANCE: invention suggests smart gas and gas condensate well consisting of tubing string and subsurface equipment placed at the tubing string made of separate functional modules such as bottomhole module, module connecting tubular cavity with annular below-packer zone, module dividing annular space, protective module, compensatory module, module arranging fluid motion in annular and tubular space in above-packer zone, wellhead module, each of them comprising the respective functional equipment such as funnel, below-packer circulating valve, packer, gas lift mandrel, heat buffer, above-packer circulating valve, wellhead retrieving whipstock, and containing auxiliary equipment. At that subsurface equipment comprises additionally functional module such as measuring module mounted between module arranging fluid motion in annular and tubular space in above-packer zone and wellhead module. At that among functional equipment measuring module comprises optical temperature and pressure sensor mounted in the holder and complete with submersible fibre-optic cable fixed by binding bands at the tubing string and its sleeves made with protectors. The fibre-optic cable is connected by means of cable seal made with sealing element and placed at the point of X-mas tree passage to the wellhead fibre-optic cable, which may interact with optoelectronic unit, which, in its turn, may interact with automatic operator's position through wireless communication. At that the submersible fibre-optic cable is placed inside hermetic tube of stainless steel, which is protected by braid, while the optoelectronic unit is installed into protection housing equipped with heating and conditioning systems and self-sustained power supply units.EFFECT: improved performance, operational reliability due to permanent temperature and pressure monitoring inside the well.2 cl, 5 dwg

ethod of simultaneous-separate liquid injection as per reservoirs with possibility to measure parameters of injected liquid and installation for its implementation // 2552405
FIELD: oil and gas industry.SUBSTANCE: installation comprises underground equipment assembly run in the well using the pipes string, including funnel-positioner, lower packer, reducer-positioner, device of injection distribution, top packer, extension. Device of injection distribution contains casing and removable parts, is equipped with to independent pressure gauge, middle independent pressure gauge, and bottom independent pressure gauge. Top and bottom unions are installed in the removable part of the device of injection distribution with possibility of both unions removal by one round run operation.EFFECT: assurance of possibility of information acquisition on injection pressure upstream and downstream each union for long time period, reception of reliable data on injection mode, increased process reliability.4 cl, 2 dwg

Producing reservoirs survey method at dual operation of multi-pay well and installation for its implementation // 2546218
FIELD: oil and gas industry.SUBSTANCE: installation consists of a liner with blind, overflow valves, packer, connecting and disconnecting device, junk basket, electric valve with latching mechanism equipped with pressure transducer, submersible motor supplied by electricity through a cable, submerged telemetry unit connected by electric circuit through windings of the submersible motor and cable with control station and data receipt and processing unit. Knock-off valve and return valve are placed above the electrically operated pump. The installation comprises a unit that excludes impact of the submersible motor to power supply line of the electric cable, to data measurement and receipt.EFFECT: improved efficiency of reservoir parameters measurement at the well survey, efficiency of electric valve control, optimised production in real-time mode.8 cl, 2 dwg

ethod of well bore zone treatment for productive formation // 2542016
FIELD: oil and gas industry.SUBSTANCE: method of a well bore zone treatment for a productive formation that includes running in of an in-series bottom-up mounted hydroimpulsive device and a jet pump at the pipe string to the well. Fluid is delivered to the hydroimpulsive device and this fluid is used for an impact on the well bore treatment zone with simultaneous pumping the fluid with colmatage particles by the jet pump to the surface. A depth gauge is mounted additionally at the tubing string in front of the hydroimpulsive device. At that a rotary hydraulic vibrator is used as the hydroimpulsive device to create a water jet and pulse-cavitating flow along the perforation interval. An impact on structures of the formation with fluid is made by the excitation of resonant oscillation of the fluid column in the well due to matching of the ripple frequency of the rotary hydraulic vibrator and own resonance frequency of the casing string with the fluid, placed below the rotary hydraulic vibrator and being a resonator of an organ pipe type. The required oscillation frequency f, Hz, is determined by the specified mathematical expression.EFFECT: improved efficiency of performed surveys and treatment of the well bore zone of the formation with a combined water-jet effect on perforated openings or filters of the production casing and the pulse-cavitating flow to the formation structure with fluid and monitoring of the treatment parameters.2 cl, 1 dwg

ethod for determining formation pressure in oil producer equipped with submerged electric-driven pump // 2539445
FIELD: oil and gas industry.SUBSTANCE: invention refers to the oil-extracting industry and can be used on oil deposits for measuring formation pressure for controlling and managing the oil extraction process. The method involves measuring the formation pressure in an oil producer equipped with a submerged electric-driven pump. A calculation process involves using a fluid influx point from the formation to the well via a known uniform-density damping fluid when commissioning the well after the damping procedure by formula.EFFECT: reducing a surveyed well downtime, increasing the accuracy and reliability of determining the foundation pressure, and facilitating the implementation when commissioning the well after damping.2 dwg

ethod for determining profile of thermal conductivity of mine rocks in well // 2539084
FIELD: mining.SUBSTANCE: according to the method, a casing string with temperature sensors attached to its outer surface is lowered to a well and cement is pumped to an annular gap between the casing string and well walls. During a cement filling and hardening process, temperature measurements are made and thermal conductivity of surrounding mine rocks of the well is determined as per the measured relationship between temperature and time.EFFECT: possibility of simultaneous reception of information on properties of a relatively thick layer of rocks around the well and information on thermal conductivity of rocks for the whole cemented interval of depths.3 cl, 2 dwg, 1 tbl

Well temperature measurement device // 2538014
FIELD: oil and gas industry.SUBSTANCE: device includes a mechanical oscillating system with constant magnets fixed on it and a converter of mechanical oscillations to electrical ones. A mechanical oscillating system is made in the form of a cylindrical bimetallic spiral, one end of which is rigidly fixed, and the other one is free, and the converter of mechanical oscillations to electrical ones is made in the form of a system of interacting electromagnetic fields of constant magnets rigidly fixed on a cylindrical bimetallic spiral and coils of a drive and pickup of oscillations providing for transverse oscillations of the cylindrical bimetallic spiral.EFFECT: enhancing reliability of a device and improving its design.2 dwg

ethod for determination of parameters for well bottomhole and bottomhole area // 2535324
FIELD: oil and gas industry.SUBSTANCE: invention is related to the area of wells completion and testing in oil industry and intended for calculation of parameters for the well bottomhole and bottomhole area. The method where in process of string movement in the well pressure is measured by two sensors, at that one sensor is installed over the packer while the second one is installed below the packer. According to results of pressure measurement fluid density is determined and then flowing bottomhole pressure is determined on the basis of fluid density, gravity constant, preset rate of drilling string motion, cross-sectional area of the drilling string, formation pressure, and productivity index of the well.EFFECT: potential determination of parameters for the well bottomhole and bottomhole area during round-trip operations with further calculation of liquid influx/reflux at the bottomhole and calculation of skin factor, permeability or thickness of the reservoir.13 cl, 5 dwg

Device and method for simulation of well structure and operating performances // 2531696
FIELD: oil-and-gas industry.SUBSTANCE: evaluation of fluid inflow fraction from every productive zone of multi-zone productive well comprises determination of pressure at wellhead. Integrated indicator curve (IPR1) is obtained to describe the relationship between pressure and fluid yield from first productive zone and integrated indicator curve (IPR2) is obtained to describe the relationship between pressure and fluid yield from second productive zone. Value for integrated indicator curve at the point of mixing (IPRm) is obtained with the help of IPR1 and IPR2. Initial fluid inflow fraction from first productive zone at mixing points and initial fluid inflow fraction from second productive zone are defined. First total curve of outflow (TPR1) is obtained describing the relationship between fluid pressure and yield, fluid flowing from mixing point to wellhead. First portion of fluid inflow from first productive zone (Q11) and first portion of fluid inflow from second productive zone (Q21) are defined at mixing point with the help of IPRm and TPR1. Machine-readable carrier accessible for processor comprise program including instructions for above listed jobs.EFFECT: more efficient evaluation of the portion of influx from productive seam.20 cl, 5 dwg

ethod and device to measure technological parameter of fluid medium in well // 2531422
FIELD: measurement equipment.SUBSTANCE: system (100) of sensors for measurement of a technological parameter of a fluid medium in a well location, comprising a resonator (110) of a parameter, which is located in a well (106), having resonance frequency that varies depending on the technological parameter of the fluid medium and which in response generates a resonant acoustic signal on the resonance frequency that indicates the technological parameter. Besides, the system comprises an acoustic sensor (118), arranged in the location near above the surface, spaced from the parameter resonator, a measurement circuit (102), connected with the acoustic sensor, and an acoustic source connected with a pipe in the location near above the surface and spaced from the parameter resonator placed in the well. At the same time the acoustic sensor is made as capable of receiving the resonant acoustic signal, transmitted from the parameter resonator, the measurement circuit is arranged as capable of formation of an output signal of the technological parameter, corresponding to the technological parameter of the fluid medium, in response to the received resonant acoustic signal, and the acoustic source is arranged as capable of transmission of the acoustic signal into the well.EFFECT: provision of measurement of well fluid medium properties in real-time mode both in process of drilling and in process of well operation.20 cl, 6 dwg
ethod for determining behind-casing flows // 2530806
FIELD: oil and gas industry.SUBSTANCE: the method is realized in two stages. At the first stage to the lower horizontal producer a flow string is run in to the beginning of a slotted filter. A heat insulated filter is set in the upper horizontal injector above the slotted filter. In the upper horizontal injector temperature tests are made in the interval from the well head up to the packer. Steam is injected to the lower horizontal producer and temperature tests are made simultaneously in the upper horizontal injector. Upon completion of steam injection to the lower well the final temperature test is made in the upper well. At the second stage fresh water is injected to the upper horizontal injector and a heat insulated flow string is run in with a thermal packer and shank. The packer is set before the slotted filter and control temperature test is made in tubular annulus in the interval from the well head up to the packer. Steam is injected to the upper horizontal injector though the heat insulated flow string, through the packer and shank to the beginning of the slotted filter. At that, periodically, upon commencement of injection, temperature tests are made in tubular annulus in the interval from the well head up to the packer. Upon completion of steam injection the final temperature test is performed in the upper horizontal injector. When required, tests in the lower producer and operational procedures for the wells are interchanged.EFFECT: improving authenticity of the obtained results during identification of intervals with cross flows behind the casing for wells operated in deposits of viscous and superviscous oil.

Device for stepwise measurement of fluid physical parameters in horizontal well // 2523335
FIELD: mining.SUBSTANCE: proposed device comprises housing to accommodate the set of pressure and temperature gages, moisture metre and flow metre, electronics unit connected by logging cable, on one side, with surface control station and. On opposite side, with said gages, coupling unit with cable joint head and centring skid. Instrumentation module is secured at said housing by leverage, said module including inclination metre and extra gages, at least, moisture metre and flow metre connected with electronics unit. This module can reciprocate along the gravity vector between casing pipe and housing. It is located at casing pipe profile lower part by centring skid and coupling unit. It is equipped with housing turn drive and instrumentation module to turn them from gravity vector set by inclination metre via electronic unit.EFFECT: registration borehole fluid interface boundaries and flow rate of every separate phase in conditionally horizontal wells.4 cl, 3 dwg

Bubble-point pressure determination method // 2521091
FIELD: oil and gas industry.SUBSTANCE: bubble-point pressure determination method includes measurement of bottomhole pressure at different oil production rates and registration of bottomhole pressure change curves upon returning the well to production in linear and nonlinear oil influx modes above or below bubble point pressure. At that wellhead pressure change curves and dynamic level changes in annular space are recorded additionally. By measurement results average density is calculated at each moment of time for the mixture column at annular space and the curve of average density changes in time at annular space is plotted. The free gas release is fixed when a gas separator releases it to the annular space. The value of bubble point pressure is determined by comparison of the mixture density change curve with pressure changes at pump suction at a certain period of time.EFFECT: improvement of accuracy measurement of bubble point pressure.1 tbl, 1 ex, 3 dwg

System and method for well production optimisation // 2520187
FIELD: oil and gas industry.SUBSTANCE: invention is related to a method of well production optimisation. Intervals are selected in a deviated offshoot and drill-stem testing and borehole treatment is deployed. Then each interval is isolated in order to perform the required testing. The obtained testing data are evaluated in order to define respective recovery measures, which are implemented later by means of the drill-stem testing and borehole treatment.EFFECT: provision of testing and treatment for the plenty of intervals in a horizontal hole during one running to the borehole.11 cl, 6 dwg

ethod for determination of bottomhole pressure in oil well equipped with electric submersible pump // 2515666
FIELD: oil and gas industry.SUBSTANCE: method lies in measurement of the maximum dynamic head depth for the known well-killing fluid with homogeneous density when bringing the well on to stable production after killing according to the following formula Pbthp=ρkf.·g·(Hperf-HDHmax), where ρkf - density of the well-killing fluid, kg/m3; g - acceleration of free fall, m/s2; Hperf - height of the upper perforated openings, m; HDHmax - maximum dynamic head depth in the well when bringing the well on to stable production after killing, m.EFFECT: reducing downtime during well surveys, improving accuracy and reliability while determining the bottomhole pressure and simplifying of the bottomhole pressure measurement when bringing the well on to stable production after killing.3 dwg

onitoring method of inter-well parameters (versions), and oil recovery process control system // 2509888
FIELD: oil and gas industry.SUBSTANCE: monitoring method of inter-well parameters, at which by means of a laser radiation source there formed with the specified duration and frequency is a light pulse entering a fibre-optic cable where dissipation radiation is evolved through the cable length. Dissipation radiation entering a processing unit is converted to an electric signal and amplified. Then, a useful signal supplied to the input of the second controller is separated from it, where frequency of displacement of the useful signal relative to generation frequency of the laser radiation source is determined, and then, as per its value there calculated is a current value of pressure change parameter; the obtained data is compared to the those specified in the first controller, at deviation of which an oil recovery process is automatically controlled in compliance with the change of inflow, which is determined by continuous measurement of the well pressure change; electric motor shaft rotation frequency is controlled; when pressure change parameter value is lower than the specified value, the electric motor shaft rotation frequency is increased, and when the pressure change parameter value is higher than the specified value, then the electric motor shaft rotation frequency is decreased.EFFECT: optimisation, automation and enhanced efficiency of an oil recovery process.16 cl, 3 dwg

ethod for determination of influx profile and borehole environment parameters in multilay well // 2505672
FIELD: oil and gas industry.SUBSTANCE: well production rate is changed and temperature is measured during certain time period for fluid flowing to the well from each layer; temperature variation value ΔTP is measured for initial stage and steady-state value A of temperature-time logarithmic derivative is calculated for each layer. Specific yield value q for each layer is determined against the specified mathematical expression. Yield Q for each layer of the well is determined and influx profile is defined as totality of yields Q for all layers.EFFECT: improving accuracy of well parameters determination.7 dwg

ethod for determination of technical condition of wells // 2500886
FIELD: oil and gas industry.SUBSTANCE: method includes double recording of temperature distribution along well bore by thermal logging with two identical thermometers located at certain distance from each other along the well bore and further comparison of received temperature logs. Comparison of received temperature logs is made by their correction processing and by results of such comparison summary is made about geophysical inhomogenuities in well formations or formation influx.EFFECT: eliminating necessity in double measurement of distributed temperature along wells axis during pumping and selection of fluid for the purpose of survey of well state.3 cl, 3 dwg

Equipment for well survey // 2500885
FIELD: oil and gas industry.SUBSTANCE: equipment contains thermal logging system made as a heater connected to power supply source, thermometer connected to recorder through amplifier and round-trip equipment made as a winch with controlled drive connected by its output to recorder. Round-trip equipment is connected kinematically to logging cable at which end heater and thermometer are fixed one by one. The equipment contains additionally control unit, switch and borehole geometry tool with end instrument. At that borehole geometry tool is fixed at logging cable above the heater and its output is connected through end instrument to control unit, which output is connected through switch either to control input of the heater supply source or to control input of the controlled drive of winch of the round-trip equipment.EFFECT: obtaining unambiguous results of survey on thermal conductivity of formations surrounding the well with variable cross-section.4 cl, 2 dwg

ethod of hydrogasdynamic investigations of wells // 2490449
FIELD: oil and gas industry.SUBSTANCE: method includes measurements of pressure, temperature and flow rate for the fluid at preset operating modes of the well, processing of results and determination of quadratic resistance coefficient. At that influence function and quadratic resistance coefficient are determined by formula (1) or formula (2). Herewith the period for investigations is set, then it is divided into N time intervals which duration depends on the well data; known properties of the influence function are set and an equation is written for each interval: (3) and (4) or (5) and (4). Then influence function and quadratic resistance coefficient are calculated by solving simultaneous equations (3) and (4) or (5) and (4) by linear programming method considering the preset properties of influence function and provided that minimum of linear function F is determined by the formula (6).EFFECT: improving accuracy in determination of productive data for the well.3 dwg

Stimulation method of formation fluid influx from well // 2485305
FIELD: oil and gas industry.SUBSTANCE: stimulation method of formation fluid influx from the well consists in lowering to the well of a tubing string. Counter pressure on the productive formation is decreased owing to replacing the liquid column with liquid-gas mixture (LGM) at observance of the required value of depression on the productive formation. Before the tubing string is lowered, its lower end is equipped with a remote subsurface pressure gauge and a filter. The tubing string is lowered to the well so that the filter is located opposite the formation perforation interval; after that, treatment of the bottom-hole zone of the formation is performed using a chemical method with process exposure for reaction. Then, the tubing string is lowered further so that the filter is located below the formation bottom, and into the inter-string space there lowered is a string of flexible tubes (FT) 100 m below the liquid level in the well. The liquid column is replaced in the inter-string space of the well with LGW and lowering of the FT string is continued. When lower end of the filter of the tubing string is reached, lowering of the FT string is stopped; then, stimulation of the formation fluid influx is started by gradual reduction of density of pumped LGM till the required depression on the productive formation, which is controlled as per readings of the remote subsurface pressure gauge, is achieved. After completion of stimulation of the influx from the well there removed is FT string from the inter-string space of the well, and operating equipment is lowered to the well and the well is put into operation.EFFECT: improving efficiency and quality of stimulation of formation fluid influx from productive formation.2 dwg

ethod and system for interpretation of swabbing tests using non-linear regression // 2474682
FIELD: oil and gas industry.SUBSTANCE: method for increasing the extraction in the reservoir bed involves the swabbing tests in the pipe at some depth. The pipe is arranged in the well shaft. Some part of the well shaft is locate inside the reservoir bed. From time to time, pressure is measured in lower part of the pipe using a pressure gauge in order to obtain a variety of pressure measurements during the swabbing test. Pressure gauge is attached to inner wall of lower pipe part. Variety of velocities of the fluid flowing from reservoir bed is determined through perforations made in the well shaft to the pipe using the flow velocity equation and variety of pressure measurements.EFFECT: improving the information acquisition efficiency.20 cl, 8 dwg

ethod for determining main parameters of simultaneously operating gas formations // 2473803
FIELD: oil and gas industry.SUBSTANCE: according to the proposed method, using geophysical equipment in several steady-state operating modes of gas well with exposure of the well in each of the modes at least for 1-3 months simultaneously with measurement of pressure and flow rate profiles in the influx zone, temperature profile is additionally measured; after that, temperature of the gas supplied to the well shaft from each operating gas formation is determined, and bottomhole pressure is fixed in the middle of depth of each operating gas formation. Besides, after the well is changed over to the next steady-state mode after the specified parameters are measured, value of effective Joule-Thomson coefficient is determined for the previous steady-state mode as per the formula. Later, considering the obtained value of effective Joule-Thomson coefficient, formation pressure, temperature and filtration coefficients are determined as per formulae.EFFECT: improving determination accuracy of formation pressure and filtration coefficients of simultaneously operating gas formations at reduction of the number of investigations in the wells; providing the determination of formation temperature of each operating gas formation.2 cl

Device for hydrodynamic monitoring of wells // 2471984
FIELD: mining.SUBSTANCE: device comprises a tight body suspended on a geophysical cable, where a motor is installed, as well as an electromechanical packer connected to it by means of a screw gear and a controlled valve device. At the same time the device is additionally equipped with a switching unit, installed above the electric motor, an anchor installed above the electromechanical packer, two pressure compensators, one of which is installed above the anchor, and the second one is installed below a balancing valve, a tip of a cable head installed in the lower part of the device, and a remote well tool fixed to the tip of the cable head. Besides, the switching unit and the electric motor are arranged in a tight body.EFFECT: higher reliability of tight closure of tubing string cavity and provision for possibility to efficiently monitor pressure change when operating in wells in a depression mode.2 dwg

Device to measure pressure of drilling mud in well // 2471983
FIELD: mining.SUBSTANCE: device comprises a body, units of driving and picking oscillations, a membrane, a line of bottomhole linkage with a wellhead, a pressure converter in the form of a multi-turn tubular spring with pins fixed on its free end, in the gap between which there is a spiral inserted from a mechanical oscillating system of balance-spiral. The free end of the spring may move along the spiral circumference, varying its operating length.EFFECT: enhanced reliability.1 dwg

ethod of causing fluid intrusion from well // 2470150
FIELD: oil and gas industry.SUBSTANCE: invention may be used in development of wells with bed pressure of 0.8-1.0 of water column hydrostatic pressure in well. Proposed method comprises running-in of tubing into well, decreasing pressure on productive bed by replacing water column with gas-fluid mix by forcing it with the help of booster unit, and providing required ratio of mix components to reach required pressure on productive bed. Note here that at bed pressure of 0.8-1.0 of water column hydrostatic pressure in well, remote-control depth gage is fitted on tubing bottom end prior to running in. Tubing run-in in well, water column is replaced with gas-fluid mix be injecting it by booster unit, said mix representing higher-density foam including surfactant with minor aeration of 5 to 7 m3/m3. Then, fluid intrusion is initiated by injecting gas-fluid mix in well annular space while higher-density foam is replaced with lower-density foam. Aeration is gradually increased control pressure on production bed to preset magnitude to be controlled by said depth gage. Reached pressure is maintained by varying injection pressure of booster unit to circular foam in volume equal to that of the well. If fluid intrusion occurs, foam in well is replaced by process fluid with density that allows maintaining bed collecting properties. Note here that in case fluid intrusion does occur, foam circulation is terminated to define acidity of well fluid by sampling bed fluid for pH-factor. Thereafter, acid composition is injected and forced into bed via tubing. Then, pause is made for 2-3 h to open tubing gate valve to repeat abode described jobs.EFFECT: higher quality and efficiency.2 dwg