Method of optimising process mode of operation of gas and gas condensate wells

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 for control of technical condition of wells and rapid change of process mode of their operation. Method includes: reading data from servers of automated control system of technological processes (APCS) using telemetry and telemechanical sensors, loading and storing them in a database, constructing wells and results of investigations of wells, constructing a gas collection system, simulation of formation pressure in zones of wells using hydrodynamic model of a field or approximation models well clusters, which is carried out according to planned and actual extractions of gas (telemetry data), loading obtained results in database, which are used for adaptation of model of system of intra-field collection of gas on actual data of operation, on basis of which are optimised parameters of wells and stubs, providing for execution of preset target conditions and adherence of process limits, and, taking them into account, said parameters are set by manual control or using telemechanics means. APCS is integrated with software system, which includes models of formation system, system of intra-field collection of gas and numerical algorithm for calculating process mode of operation of wells, which determines optimum distribution of extractions from wells. APCS with help of said software system periodically, with sampling interval, which is set taking into account history of operation of field, performs checking of match of actual measured parameters of operation of field with their calculated values. In case of detection of divergence upon comparison of controlled parameters with their calculated values by a value exceeding maximum allowable value, APCS performs control action on field with simultaneous launch of integrated software system. Using same, APCS by iterations brings field to a state, where difference between actual and calculated values of parameters of its operation is within allowable process limits.

EFFECT: high efficiency of industrial safety of operation of gas and gas condensate wells and reduced risk of emergency situations.

1 cl, 1 dwg

 



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, in particular to oil production from wells by the mechanised method, and can be used in any type of pump electric drives. Under the method at wellhead passive acoustic multi-phase flowmeter is installed. Well is operated using the rig with electric drive, and electric drive control station. Well yield and watercut as per phases are determined every second under real time mode. Yield is averaged for selected time period. Further yields as per phases are compared with set process parameters. If watercut values are beyond the set limits the amount of transferred by pump produced water is reduced upon keeping of the commercial oil yield at set level. For this one of action is performed: capacity of pump unit is reduced due to motor speed; capacity of pump unit is increased due to increasing of the motor speed; the pump unit is stopped for definite time for oil accumulation at the wellhead.

EFFECT: yield keeping at set level upon reduced power consumption.

1 ex, 1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement of perforations in oil wells. The method comprises a. placement of the logging device comprising an ultrasonic receiver-radiator in a well with a casing pipe, and the ultrasonic receiver-radiator has a focal point located at a distance from the ultrasonic receiver-radiator so that it is located behind the internal surface of the casing pipe. b. radiation of ultrasonic signal from the ultrasonic receiver-radiator, c. detection of reflection of ultrasonic signal from internal part of the perforation passing through the casing pipe into formation, d. measurement of time passed between the transmission and reception of ultrasonic signal, e. determination of position of the ultrasonic receiver-radiator, corresponding to ultrasonic transmission and reception of the reflected signal, f. iteration of the step b) - e) several times and record of the obtained data. g. computer processing of the obtained data and determination of sizes of the perforation, h. meanwhile the ultrasonic receiver-radiator is located at a distance from the casing pipe of a borehole, at least, one third of the minimum length of the open channel to be measured, i. meanwhile the distance is such that reflections from the casing pipe reverberate and significantly dissipate before the reflection from inside the perforation is received by the ultrasonic receiver-radiator.

EFFECT: reduction of reverberation noise.

12 cl, 12 dwg

FIELD: physics; geophysics.

SUBSTANCE: invention relates to geophysics and can be used in prospecting for oil and natural gas deposits. Disclosed is an electromagnetic array configured for use in an underground borehole. The array includes a plurality of axially spaced electromagnets and is configured to generate a magnetic field pattern having at least first and second pairs of magnetically opposing poles. Passive ranging measurements of the induced magnetic field may be advantageously utilised, for example, to survey and guide continued drilling of a twin well. The electromagnetic array may also be used in active ranging. An array of permanent magnets providing a similar magnetic field pattern may also be used in active ranging.

EFFECT: high accuracy of survey data.

3 cl, 15 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method fluid pumping from the well is alternated with fluid accumulation in the well at switched off pump set and average delivery in time is controlled for the purpose of matching with the well flow rate by changing speed rate of the pump shaft. Pump capacity in pumping process is controlled by a submersible flow rate meter placed at the pump output. Pumping out will be performed till the pump reaches the preset minimum pressure at suction and accumulation will be performed till the pump reaches the preset maximum pressure. Pressure value is controlled by means of a submersible pressure sensor. Frequency of the pump shaft rotation during pumping period is changed on the basis of readings of the submersible flow rate meter so that maximum value of efficiency factor is reached for the pump during pumping period. Time of accumulation is limited by regulations on motionless fluid in surface equipment in winter time by permitted decrease of oil temperature in the submersible electric motor and permitted frequency of stops and starts of the latter. Maximum pressure value for the cemented stratum is selected on condition of maximum oil production and for the stratum destructed intensely in extraction process on conditions of minimum discharge of mechanic impurities.

EFFECT: increased production and maintained reliability for submersible equipment due to its operation in the mode of maximum efficiency factor.

FIELD: measurement equipment.

SUBSTANCE: invention relates to the field of instruments moving in shafts of wells, drilled via underground beds of mountain rocks. A well measurement instrument comprising a jacket made as capable of displacement inside the well shaft, at least one sensor made as capable of measurement of the well shaft parameter, a controller installed in the jacket comprising at least one of the following: a data saving device and an operation control device, at least for one sensor, and the first port of optic connection installed in the first opening in the jacket, besides, the first port of optic connection includes a light source controlled with the help of electricity, besides, the first hole in the jacket tightly closed by the port plug having an optically transparent window, besides, the port plug is made as capable of resisting the inlet of fluid medium of the well inside the jacket, and the second port of optic connection installed in the second opening in the jacket, besides, the second port of optic connection includes a photodetector, besides, the second opening in the jacket is tightly closed with the port plug, having an optically transparent window, besides, the port plug is made as capable of resisting inlet of fluid medium of the well inside the jacket.

EFFECT: transmission of data on working condition of an instrument and/or data saved in the instrument, and/or transmission of control signals and working instructions to such instruments during location of instruments on earth surface.

13 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, namely to method of tightness testing of the cased injection well. Methods includes: determination of actual pressure difference on the packer ΔCp_a=Pwh1-Pfr-Cwh2+Cfr2-Perr1-Perr2, where Pwh1 and Pwh2 are measured wellhed pressure on injection to top and bottom reservoirs, respectively, Cfr1 and Pfr2 are pressure losses for friction during water movement via short and long strings. respectively, Perr1 and Perr2 are absolute errors of measurements by technical pressure gauge in short and long strings, respectively, atm. At that criterion of the tightness estimation is the pre-specified critical pressure difference ΔCd_cr. System tightness is estimated by comparison of the actual pressure difference on packer ΔCp_a and pre-specified critical pressure difference at |ΔCp_a|>|ΔCd_cr| the system is tight. Method of the tightness testing of the injection well contains stages at which: pressure change is registered in well blocked by the packer, by wellhead pressure measuring at input to tubing string in top and bottom reservoirs, respectively. Data analysis is performed, and tightness is determined. At that preliminary current water flowrate via pipeline is measured Q. Tightness is estimated if the following condition is met: ΔCw_cΔCw_a(QcQa)2, where ΔCw_c and Qc are measured current wellhead pressure difference and current water flowrate, respectively; ΔPw_a and Qa are actual measured current wellhead pressure difference and current water flowrate, respectively. If the condition is met the well is tight.

EFFECT: decreased number of tightness tests in wells operated under process of simultaneous-separate injection.

16 cl, 2 tbl, 2 dwg

FIELD: mining.

SUBSTANCE: electronic probe is offered which contains a metal power supply compartment 1 and a plastic housing 2 conjugate to it where a measurement unit 3, and also a signal processing unit 4 designed as a microcontroller unit, and a magnetic antenna 5, which are filled with a moisture resistant compound. The measurement unit 3 comprises a tilt sensor 6 of longitudinal axis with reference to the horizon, a roll sensor 7 and a pulse stabiliser 8. The plastic housing 2 is made of multilayered fibreglass the inner layers of which are made of vitreous fibres with longitudinal and orthogonal orientation in the housing structure, and external layers are made of vitreous fibres with diagonal orientation. The magnetic antenna 5 and the measurement unit 3 have multilayered high-adhesive moisture resistant coating 11, and the microcontroller unit 4 - the coating 12 of varnish with low adhesive ability to the moisture resistant coating of the measurement unit 3 and the magnetic antenna 5, and they are filled during assembly with the moisture resistant compound 13.

EFFECT: improvement of the probe reliability due to strengthening of the housing and reliable sealing of the main electronic units.

3 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: stopped well is chosen; its flushing is performed, and with that, temperature at the circulation system outlet is recorded. With that, pumping of hot liquid (heat carrier) is performed through annular space, with that, at its inlet the liquid temperature varies as per a periodic law and is recorded, and heat conductivity coefficient λ"п" and coefficients of heat transfer through tubing strings k1 and casing string k2 are calculated as per mathematical formulas.

EFFECT: improving measurement accuracy of an average integral value of heat conductivity of mine rocks as to a well log and determining coefficients of heat transfer through the tubing strings and through the casing string, length of the circulation system of the well.

FIELD: measurement equipment.

SUBSTANCE: invention relates to well measurement devices, used to measure electromagnetic properties of a well shaft. A well measurement instrument is proposed, which includes at least one non-flat antenna configured to transmit and/or receive electromagnetic radiation. At the same time the non-flat antenna includes at least one non-flat loop of an antenna wire turned around the instrument body. Besides, in one version of realisation the non-flat antenna may be considered double-planar, including the first and second sections of semi-elliptical shape, forming the first and second crossing geometric planes. In the other version of realisation axial separation between the non-flat loop of the antenna wire and the central line of the antenna passing along the circumference changes substantially in a sinusoid manner relative to the azimuthal angle along the circumference of the instrument. The sample non-flat antenna according to the invention may be preferably made as capable of receiving and transmitting radiation substantially of purely x-, y- and z-mode.

EFFECT: provision of directional action of an antenna with the possibility to receive signals from different sides.

15 cl, 13 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to production of hydrocarbon raw materials from the productive formation drilled by a well and relates, in particular, to non-radioactive indicators and methods of their use for tracking of movement of treating liquid and formation fluids. The method of the treating liquid movement tracking in the productive formation drilled by a well comprising: preparation of the treating liquid containing multiple indicator additives representing drops of high-viscosity liquid with the diameter no more than 1000 nanometres; pumping the treating liquid with multiple indicator additives into the borehole and productive formation; determination of position and distribution of the treating liquid by registration of changes in the physical properties of the formation caused by inflow of the treating liquid with multiple indicator additives.

EFFECT: improvement of accuracy of determination of position and distribution of the treating liquid by registration of changes in the physical properties of the formation caused by inflow of the treating liquid with multiple indicator additives.

18 cl

FIELD: oil-and-gas industry.

SUBSTANCE: method includes the drilling rate algorithm according to which the following technological parameters of drilling process - bit rpm, bit load, flow rate of flushing liquid - are raised to the powers determined by the mathematical expressions based on the generalised parameters characterising the bit interaction with rock: time of interaction of bit cutting structure with rock; mechanical and hydraulic capacities spent at bottomhole; bottomhole differential pressure. The bit is represented by a three-channel converter of mechanical and hydraulic capacities into the deepening. The bit rpm channel and the bit load channel together perform the first stage of process of deepening - bottomhole rock destruction by the mechanical power, and the channel of the flushing liquid flow rate perform the second stage of deepening - bottomhole cleaning from the destroyed rock by hydraulic power. Both stages are performed in a single interaction, that in turn is a source of the channel feedback and of interchannel interconnections pre-determining a basis of regulation of drilling process conditions.

EFFECT: decrease of dependence of the operating mode of a bottomhole hydraulic engine from bottomhole conditions and therefore its stabilisation.

6 cl, 2 dwg

FIELD: mining.

SUBSTANCE: method is proposed to direct drilling of a drill well in a target underground bed, including stages of preparation of drilling equipment, having a layout of a bottom of a drilling string, which includes a controlled subsystem of directional drilling and a directional measurement logging instrument during drilling with the possibility of circular viewing and anticipatory viewing; determination of availability of the specified type of bed feature in a target bed; and navigation of a drilling trajectory in a target bed by drilling equipment, which includes reception of measurement signals from the directional measurement instrument, production of bed parameter indices on the basis of received measurement signals in respect to a bed feature in the target bed and control of a subsystem of directional drilling for drilling in the direction determined depending on produced indices of bed parameters.

EFFECT: expansion of functional capabilities and increased information value of tests.

23 cl, 56 dwg

FIELD: mining.

SUBSTANCE: method involves action on a mine rock and its destruction with a rotating indenter under load, determination of hardness parameters using the value of applied load and area of contact surface of the indenter. Measurements are made immediately during drilling in a differential form: mechanical drilling speed or time of duration of a certain depth interval, a value of speeds or time is adjusted by variation of load on a bit; the bit load value is measured at moment of equality of speeds or times and hardness of mine rock is determined as per an algorithm.

EFFECT: optimisation of a well drilling process.

4 cl, 1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement equipment and may be used to measure parameters of a fluid pumped into a well. The system includes an electromagnetic flow metre, which is equipped with a controller making the base of the first measurement module, a vibration density metre equipped with a controller, making the base of the second measurement module. Modules are built into an injection line of a manifold with controlled medium, with the help of quick-split connections, the second measurement module is connected to the first measurement module, and the second module performs measurement of density, temperature and pressure. Modules are connected to a computer with the help of an information cable and a power supply unit. The computer is installed on a mounting base - all-terrain motor chassis. System supply is carried out from an AC network via a voltage stabiliser or from a board network of a vehicle.

EFFECT: increased universality, mobility, convenience of service, reliability, reduced dimensions.

3 dwg

FIELD: machine building.

SUBSTANCE: group of inventions refers to dynamic dampers of torsional vibrations and can be used at drilling of oil and gas wells. A dynamic damper of torsional vibrations comprises a case with a flywheel installed inside, the weights are fixed in the flywheel body and the flywheel is made as a torque link system. According to the first invention version, the shock absorbers enter the mass-joint on one end, and the weights made as cylindrical segment-plates by means of a welded bracket and lugs on the other end. According to the second version, a rod with hold-down screws and a lock ring is installed inside the case on one side, and a rod and a spring for its backup are installed on the other side. The shock absorbers enter the mass-joint on one end, and the weights by means of a crosspiece on the other end, the weights are made as cylindrical segment-plates fitted by recesses of different depths. Both versions imply that elastic elements are inserted between the weights for the clearance Δ, together with the weights being distanced from the washer with flyweight in the form of a hollow cylinder.

EFFECT: improved damping characteristics, reduced negative impact of torsional vibrations on a drilling unit in the wide range of its rotation frequency change, increased service life and reliability, reduced failures of the equipment.

3 cl, 5 dwg

FIELD: mining.

SUBSTANCE: as per one version of implementation, the method involves well shaft drilling by a drilling bit, determination of an axial load on the bit during drilling of the well shaft, determination of pressure drop in the working surface area of the drilling bit during drilling of the well shaft and determination of the corrected axial load on the bit as per a certain axial load on the bit and a certain pressure drop.

EFFECT: creation of improved drilling bit and method allowing to correct changes in measurement results of an axial load and torque, which occur due to pressure drop in the drilling bit.

20 cl, 6 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method, a device and a computer-readable data medium used when constructing a geologic model of an oil or other deposit. The invention enables, for markers selected as the initial solution, to calculate marker depths at each well which provide the best overall correlation. The method includes determining, for each marker which is part of a set, a composite function which is the sum of correlation coefficients of a system of well logging techniques for pairs of wells located no more than a given distance from each other. Partial derivatives are calculated for said composite function and the obtained vector is smoothed and used to find a greater value of the composite function at a certain section along said vector. If a greater value is not found, the last position of the marker is considered the solution, otherwise the solution point is smoothed and the process is repeated. The marker depths are sorted at each algorithm iteration.

EFFECT: improved accuracy of calculation of parameters used to construct a geological model of the location of oil or other deposits.

3 cl, 9 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method, a device and a computer-readable data medium used for building a geological model of an oil or other mineral deposit, particularly for determining correlation coefficients for a set of well-logging curves and finding the position of marker depths, for which the correlation coefficient value is maximum. The method enables, for a marker already having marks at a certain so-called reference group of wells, to calculate said marks for a well from another group. For each well W, on which the marker depth value is being searched for, wells of a reference group lying at a given distance from well W are selected, and from among them a well is selected with the highest correlation coefficient, wherein the point at which said maximum is reached is denoted as the desired mark of the marker. Verification tests are used to search for wells in which the correlation function is less than the maximum correlation coefficient, and the correlation quality coefficient is greater than the maximum correlation coefficient. The found well is added to the reference group of wells.

EFFECT: improved accuracy of calculation of parameters used to build a geological model of the location of oil or other deposits.

8 cl, 9 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises well drilling, core recovery in drilling and core analysis for content of impurities. Note that spectral analysis is made to detect water-oil-insoluble salts of heavy metals and to fix their occurrence depth. Availability of said compounds allows making the conclusion on the location of super reservoirs in deposit. Quantitative content of said impurities in core rock allows making the conclusion on accurate location of interlayers. Said accurate location is used to take measures for prevention of well collapse by reducing the mechanical drilling rate.

EFFECT: simplified core analysis, higher validity, decreased accident rate.

1 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: device contains at least a temperature sensor, level gages and a mud flowmeter and a density gage that includes a gamma radiation source and a detector block as well as an electronic signal processing unit and a computer. The temperature sensor, level gages and the mud flowmeter and the gamma radiation source are mounted together in a space-saving way on the common load-carrying platform made as a quick-disconnecting hatch cover in the upper part of the mud ditch. Inside of the latter there is a suspended acoustically transparent container rigidly coupled to the platform and divided into two cavities; in one cavity there is the temperature sensor while in the other one there is a velocity metre made as an electroacoustic transducer interacting through the contact surface with the container wall and faced by a transducing surface towards the mud ditch surface. The gamma-radiation source is placed on the outer lower surface of the container.

EFFECT: high accuracy of the monitored parameters, simplicity, small size and mobility of the design, handling safety, reduction of time period for assembly and disassembly.

2 cl, 1 dwg

FIELD: mining industry.

SUBSTANCE: system includes mathematical model of drilling process in form of combined influence of conditions at pit-face and of drilling column operation. Model of drilling process is constantly renewed by results of well measurements performed during drilling operation. On basis of renewed drilling process model a set of optimal drilling parameters is determined and sent to system for controlling surface equipment. Also, system allows surface equipment control system to automatically adjust current control sets for surface equipment on basis of renewed optimal drilling parameters. Different control scenarios are generated and executed for transferring data to surface equipment control system on basis of current drilling mode.

EFFECT: optimized operation.

2 cl, 7 dwg

Up!