Method for determination of stratum productivity in process of well drilling

FIELD: oil and gas industry.

SUBSTANCE: method involves drilling of a well accompanied by mud logging. At that in drilling process total content of hydrocarbon gas and luminescent properties of capillary extraction are determined. Moreover if total content of hydrocarbon gas is 2% and more and luminescent properties of capillary extraction are equal to 2 points and more the penetrated stratum is subject to further surveys. Packed-hole assembly is pulled out from the well, flow string with packer is lowered and the packer is located over the penetrated stratum; circulation of flush liquid is arranged, tubular annulus is filled with a tracing fluid, the packer is inserted into the borehole over the penetrated stratum. The flow string is swabbed with the rate of 10-17 m/min till intake of reservoir fluid is obtained. In swabbing process samples of liquid are taken to check oil presence. When oil is received from the stratum its daily production rate is determined by build-up method from the maximum reduction value for the level, but not less than 3 MPa of bottomhole pressure. Conclusion on productivity of the penetrated stratum is made provided that oil flow rate is 2 m3/day and more. Drilling of the well is continued.

EFFECT: increase of reliability and operational efficiency, determination of productivity in the process of well drilling.

 

The invention relates to the oil industry and can find application in the determination of productivity in different degrees of oil reservoirs while drilling wells.

There is a method of determining the productivity of an oil reservoir in a three-dimensional inter-well space, including ground-based three-dimensional seismic survey 3D longitudinal waves by the method of common-depth-point (CDP), drilling with coring, electrical, radioactive, acoustic and seismic logging, well testing, the study of the core. The sum of the data of drilling and geophysical research wells (GIS) by known criteria is judged on the presence of collectors, their capacity, permeability, hydroconductivity, nefteproduktov, the level of the oil-water contact (OWC), the location of oil fields, as well as the correlation between capacity, water permeability and nefteproductproect. According to acoustic, seismic, and radioactive logging, laboratory core studies are stiffness model of the target sediments, are computed synthetic seismic trace which are the time-frequency analysis (TFA), and determine the model of the seismic spectral-temporal (NWO) and acoustic samples nefteproduktov collectors forming ethanol layer. According to ground-based three-dimensional 3D seismic CDP area wells define experimental seismic NWO and psevdoakusticheskuyu images of the oil reservoir. Acoustic and psevdoakusticheskuyu images are evaluated sredneoblastnymi acoustic and psevdoakusticheskuyu velocities at the target depth interval and times. Model seismic, borehole CBA, the reference optimal OSS, acoustic and psevdoakusticheskuyu speed correlated with the capacity, water permeability, nefteproductproect collectors are regression curves and coefficients of correlation. All the routes temporary seismic cube in the target interval of the seismic recording is performed by the SWAN and psevdoakusticheskuyu conversion to determine the optimum OSS, psevdoakusticheskuyu velocities and spectral cube building high-speed attributes, which are translated into Cuba capacity, hydroconductivity and nefteproduktov collectors. Technical result: reliability and validity of definition of geological conditions of inception of exploration and production wells at any point in the three-dimensional crosshole space on-site oil fields (RF Patent No. 2259575, publ. 27.08.2005).

The closest to the proposed invention the technical essence is the way PR is conducting geological studies, in which take away the cuttings from the borehole, describe the facies characteristics of sludge each well, followed by mixing in a table and plotting the correlation scheme. This map data correlation diagram and table describe, identify the variability of the incision, predict the pinch part of the layers or their divergence, the thickness variation of facies zones relative to the predicted values. Build the graph of the index of productivity, representing the trend of the leading facial productivity traits. The values of the chart index productivity make conclusions about the qualitative composition of the wells for the presence of oil-saturated layers. At the same time as the leading facial features for graphing productivity index using coefficients luminescence and bituminization, density, size seminar, the degree of roundness and tartarians grains (RF Patent No. 2418948, publ. 20.05.2011 - prototype).

Known methods are extremely complex and give a very rough estimate reservoir productivity.

In the proposed invention solves the problem of improving reliability and efficiency of the definition of productivity in the process of drilling wells.

The task is solved in that in the method of determining the productivity of a formation during drilling, including drilling and maintenance of gas is aratani research, according to the invention in the process of drilling cuttings determine the total content of hydrocarbon gas and fluorescent characteristics of capillary extracts, when the total content of hydrocarbon gas 2% or more and luminescent characteristics of capillary extracts 2 points or more exposed layer is subjected to further study, which is lifted from the well drilling layout, go down the column tubing with a packer, place the packer above the opened seam, organize the circulation of drilling fluid, fill the annulus of the indicator fluid, set the packer in the well bore above the opened seam, cuberoot the column tubing with a speed of 10-17 m/min to obtain inflow of reservoir fluid, in the process of swabbing away and analysisroute liquid samples for the presence of oil, when receiving oil from the reservoir to determine the daily rate of formation by reduction of the level with the maximum possible decrease, but not below 3 MPa of hydrostatic pressure, make a conclusion about the efficiency of the opened reservoir when the oil production rate of 2 m3/day or more, continue drilling.

The invention

After drilling the well in the difficult intervals constructed and partially oil-saturated reservoirs due to the complexity of the cut, and m is Loy resolution of GIS methods are often unable to reliably determine the interval of oil-saturated reservoir and its productivity or estimate the productivity of each individual layer. To differentiate the productivity of each individual layer when this is not possible. For this drill, to differentiate the productivity of each individual layer should conduct complex geophysical investigations in an uncased borehole or research through the production casing. Such studies do not answer the question about productivity, but only tentatively allow you to judge the presence or absence of oil in the reservoir. More detailed studies of productivity is possible only when perforating the production casing in the interval of each oil reservoir, isolating it from the rest of the well volume and analysis of formation fluids. Such studies require downtime, lost productivity, often unreasonable from an economic point of view, when the perforated zones are weakly saturated or bezpartochnyj. It should be noted, and the fact that after the cementing of the production casing reservoirs as pore, cavernago, cavernous-pore, tremino-cavernous-pore and fissure types of collectors are kolmat cement mortar, which reduces the productivity of oil reservoirs. To restore the pristine state of the pore space required secondary environmenta what I and sometimes repeated exposure to different reagents are exposed through the production casing reservoirs.

Research productivity in the drilling process outlined in counterparts, so hard and making little reliable that their application may be indicative estimates.

In the proposed invention solves the problem of direct determination of reservoir productivity in the drilling process that entails enhancing the reliability and efficiency of determining productivity. The problem is solved as follows.

Perform drilling accompanied gazogorelochnyh research. In the sludge determine the presence and composition of hydrocarbon gases and capillary saturation extracts. When the total content of hydrocarbon gases 2% or more and the testimony of 2 or more points on the luminescent characteristics of capillary extracts in the drilled cuttings layer this layer is examined for the presence of oil. Raise from the well drilling layout, go down the column tubing with a packer. Place the retainer over the open seam in the interval tight, spend circulation of washing liquid if necessary with the approval of the funnel to the bottom for removal of sludge from the downhole portion of the wellbore. Circulation fill the annulus above the packer indicator is a liquid, for example, differing in color or density of the fluid in the borehole and the estimated reservoir fluid. Perhaps the use of dyes. The presence of such liquid allows to control precisely the receipt or absence of oil in the exposed layer and control the reliability of the landing of the packer. Produce planting packer over the investigated layer, and then perform swabbing the tubing pipes with the speed of 10-17 m/min depending on the viscosity of the formation fluid to obtain the inflow of reservoir fluid from the reservoir. In the process of swabbing select and analyze liquid samples for the presence of oil. When receiving oil from the reservoir to determine the daily rate of formation by reduction of the level with the maximum possible decrease, but not below 3 MPa of hydrostatic pressure. Make a conclusion about the efficiency of the opened reservoir when the oil production rate of 2 m3/day or more.

Break the packer. Raise from the well column tubing, drill down to the layout and continue drilling until the next oil-saturated reservoir. After opening the oil-saturated reservoir repeat operations research productivity. Then continue drilling and research productivity uncovered oil reservoirs to the design depth of the well.

The result can direct the m sampling and analysis to make conclusions about the productivity of each oil reservoir. The reliability of the results and efficiency of the definitions provided direct direct research productivity.

Upon completion of drilling and casing production casing to produce a targeted opening those objects that are in the process of drilling wells were tested in the open hole and showed tributaries industrial oil.

Specific example

Perform drilling oil wells Berezinsky field accompanied gazogorelochnyh research. The diameter of the main wellbore is 155,6 mm as drilling layout using a layout with a downhole motor. At a depth of 2069-2078 m according to gazogorelochnyh studies have noted the presence of oil-saturated reservoir, in which the total content of hydrocarbon gas was 2% and luminescent characteristics of capillary extracts whitish-yellow - 3 points. After opening the reservoir in the bottom 2078 m raise boring layout, go down the column tubing with a packer and a feather on the end, washed well from cuttings with a tolerance pen to slaughter, the packer set above the opened seam in the range of dense limestone - 2049-2051 m as an indicator of the liquid used biopolymer solution. Spend swabbing the tubing pipe with the velocity of the th 10 m/min with a gradual decrease of the liquid level in the well to a depth of 1750 m, not reducing below 3 MPa hydrostatic pressure of the well, take samples of fluid and perform visual analysis of the sample for the presence of oil. The initial volume of liquid in the amount of 6 m3do not take into account, because it is an indicator liquid. Further samples mark oil with indicator fluid and clean oil. Determine the daily oil production rate of the opened seam method to restore the liquid level in the borehole from a depth of 1750 meters the Flow of fluid in the borehole was 32 m/h oil Flow rate was 5.6 m3/day.

Make a conclusion about the presence of commercial oil in the exposed layer. The layer is referred to as productive. Break the packer. Raise from the well column tubing, drill down to the layout and continue drilling on technical salted water until the next oil-saturated reservoir.

The next layer is detected at the depth of 2239-2251 m In the sludge layer, the total content of hydrocarbon gas was 2% and luminescent characteristics of capillary extracts whitish-yellow - 2 points. Packer set at a depth 2235 m as the indicator fluid use clay slurry with a specific gravity of 1.12 g/cm3. Produce swabbing the tubing pipes with a speed of 17 m/min to a depth of 1850 m, take samples of fluid and analyze samples for the presence of oil. Original the AUX volume of liquid in the amount of 6.7 m 3do not take into account, because it is an indicator liquid. Further samples do not contain oil and indicator fluid and is not mineralized formation water. Concluded that the formation is not productive.

Break the packer. Raise from the well column tubing, drill down to the layout and continue drilling clay to the next layer.

The next layer is detected in the interval 2285-2319 m In the sludge layer, the total content of hydrocarbon gas was 3% and luminescent characteristics of capillary extracts whitish-yellow - 3 points. Operations to determine the performance of the reservoir, repeat as for first productive formation. Speed swabbing set of 14 m/min First volume occasioanly fluid in the amount of 7.4 m3do not take into account, because it is clay mud - flat liquid. In subsequent volumes occasioanly fluid present indicator fluid and oil and then clean the oil. After determining the flow rate of the recovery method of the liquid level in the borehole from a depth of 1750 m oil flow amounted to 7.2 m3/day. According to a study in the reservoir attributed to the productive.

The application of the proposed method will allow to solve the problem of increasing the reliability and operatives which determine the productivity of oil reservoirs in the drilling process. The results will allow for more rapid and efficient operation of the well.

How to determine the productivity of the formation during well drilling, including drilling support gazogorelochnyh research, characterized in that in the process of drilling cuttings determine the total content of hydrocarbon gas and fluorescent characteristics of capillary extracts, when the total content of hydrocarbon gas 2% or more and luminescent characteristics of capillary extracts 2 points or more exposed layer is subjected to further study, which is lifted from the well drilling layout, go down the column tubing with a packer, place the packer above the opened seam, organize the circulation of drilling fluid, fill the annulus of the indicator fluid, set the packer in the well bore above opened seam, cuberoot the column tubing with a speed of 10-17 m/min to obtain the inflow of reservoir fluid, in the process of swabbing away and analysisroute liquid samples for the presence of oil, when receiving oil from the reservoir to determine the daily rate of formation by reduction of the level with the maximum possible decrease, but not below 3 MPa of hydrostatic pressure, make a conclusion about the efficiency of the opened seam when de is it oil 2 m 3/day or more, continue drilling.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: method involves three stages: acquisition and processing of borehole data, sending and transfer of signals, and acquisition of data on the surface. Into a drilling string there can be installed a relay system for recovery of signals. By means of a connecting element between a piezoelectric converter and a drilling pipe and by means of transfer ability of wave of stresses of the drilling string, by detection there automatically chosen is an optimum frequency and used for transfer of signals to the surface through the drilling string. In order to transfer signals, detection of a chaos generator is used, as well as in order to solve a Duffing equation, Runge-Kutta method of the fourth order is used to determine availability of a signal as per the value of the system period, and then, a useful signal is picked up. The system comprises a system for the well data receiving and sending, and a system for data acquisition on surface, as well as it can include a relay system. Signals can be transferred in two directions.

EFFECT: invention can be widely used at drilling using liquid or gaseous fluids; its advantage comprises high data transfer and detection rate.

8 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves thermometry and gamma logging of a well with recording of a background value of natural radioactivity of rocks and background distribution of temperature along the well shaft, a disturbing action, repeated telemetry and gamma logging with recording of values and data of a flow meter, and comparison of data. Thermometry and gamma logging is performed via inter-tube space of the well; the disturbing action is taken by reduction of liquid level in the well by pumping of inert gas to the inter-tube space at the pressure not exceeding maximum allowable pressure on a production string, with displacement of liquid to a tubing string through valves of a rod well pump and then to a discharge line by excess pressure bleeding-off to atmospheric pressure. At repeated performance of thermometry and gamma logging, a geophysical instrument is lifted by 50-100 m higher than the roof of upper perforation interval at the speed of 180-200 m/h with simultaneous recording of a liquid flow rate with a borehole thermoconductive flow meter, intensity of gamma emission of rocks and temperature; after the above instrument passes the distance of 50-100 m above the roof of upper perforation interval, recording is performed only with a thermometer at the speed of 400-600 m/h; when temperature anomalies are found out, which differ from temperature values at test recording via the well shaft, the data of intervals is specified and detailed by performing complex recording using the borehole thermoconductive flow meter and a mechanical flow meter at the speed of 180-200 m/h with measurement of 30-40 points at the investigated interval; after recording via the whole well shaft is completed, repeated lowering of the instrument, repeated temperature recording is performed; complex recording is performed using the borehole thermoconductive flow meter and the mechanical flow meter with measurement of 30-40 points; after the borehole working face is reached, the geophysical instrument is lifted, during which the same records are taken with a thermometer, the borehole thermoconductive flow meter and the mechanical flow meter as at the repeated lowering operation.

EFFECT: surveying of a production well with a lowered non-operating bottom-hole pump.

FIELD: oil and gas industry.

SUBSTANCE: bottomhole drilling fluid flow rate sensor includes a housing, a diaphragm and connecting tubes. At that, the device located in lower part of a drill pipe immediately above a bit and rigidly fixed on the pipe walls has a mechanical oscillating system made in the form of a hollow counterweight with a membrane, which is torsionally suspended on two capillaries, and with a constant magnet fixed on it, a system of actuation and pickup of oscillations, which interacts with a constant magnet field, and two separating vessels interconnected with the capillaries. Fluorocarbon liquid "Б"-1 serves as separating liquid for space under the membrane of the counterweight, and dibutyl phthalate - for space above the membrane.

EFFECT: improving reliability of measurement of the drilling fluid flow rate immediately during well drilling process.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: load is measured in the well location during the well operation; at that, load measurement involves load measurement by means of a subassembly attached to layout of the drilling string bottom. Load data is transferred to surface in real time mode by means of telemetry; load data is evaluated with a control device located on the surface; and corrective action in the well, which is based on the load data, is taken.

EFFECT: improving reliability and quality of analysis of measured load.

18 cl, 10 dwg

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

FIELD: oil and gas industry.

SUBSTANCE: system includes flexible tubing having a fibre optic conductor and a section with instruments. At that, fibre optic conductor is located in a cavity flush with outer surface of the section of flexible tubing equipped with instruments. Besides, the above cavity is curved. The system also includes a device for fixing the fibre optic conductor on the surface of the wall of flexible tubing, an adapter through which the above conductor passes to an internal fibre optic conductor, and a connecting coupling. The latter has the possibility of data transferring by means of contactless telemetry.

EFFECT: improving measurement efficiency of one or more parameters in the well along a certain zone of the well.

21 cl, 9 dwg

FIELD: oil and gas industry.

SUBSTANCE: method for determining the flow rate and the density of formation fluid of oil formations consists in shaping of signals when a sensitive element passes through the specified levels in the well. Measurement of time intervals between signals, with further calculation of the flow rate of the formation in relation to distance between specified levels to time interval between the appropriate pulses. Measurement of movement speed of several sensitive elements is performed. Flow rate of each next above-lying oil formation or layer is determined as difference between previous and current measurements. Density of formation fluid is determined as integral density value of the last sensitive element that floated up to the surface and that one that did not float up to the surface.

EFFECT: improving measurement reliability of flow rate and density of formation fluid.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: when surveying a gas well, its head is equipped with a separator, a gas flow rate measuring device and a flow line for flame. Gas pressure and temperature is measured on the installed device and the well flow rate is determined based on performed measurements and structural characteristics of the device. In addition, the well head is equipped with an electric power plant generating electric power at combustion of produced gas. When surveying high-flow-rate wells, the electric power plant is installed between the gas flow rate measuring device and the flame line. When surveying low-flow-rate wells, the electric power plant is installed before the gas flow rate measuring device.

EFFECT: use of produced gas during survey of gas wells for generation of electric power.

FIELD: mining.

SUBSTANCE: device is installed inside horizontal part of flow line of a production well at fixed distance before a sampling point of periodic fluid samples. The turbulator consists of one piece and is provided on a common axis with seven vertical plates, the first six ones of which, being made in the form of segments, are intended for mixing of different layers of pipeline fluid due to vertical fluid flow, and the last plate made in the form of a circle is provided in a circumferential direction with several uniformly located openings focused to the sampling point.

EFFECT: improving objectivity of evaluation of production capabilities of wells and composition of the field fluid transported via pipes.

2 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves excitation of a well, measurement of parameters by means of bottomhole instrument installed inside perforated tubing in horizontal sections of the well with different geophysical characteristics and processing of measurement results. As bottomhole equipment, remote instruments are used, which are connected to each other by means of a geophysical cable; geophysical cable is led out by means of an outlet adapter from the tubing string to the inter-tube space. In vertical part of the well there installed is a borehole pump, and a downhole pump equipment is lowered together with the lowered geophysical cable. At that, the geophysical cable is fixed on the tubing string with belts; the cable is led out to the surface through a process hole made in a tube holder, where it is sealed and connected to a surface recording unit.

EFFECT: possibility of obtaining operational information on properties of productivity of a horizontal shaft in real time during the well operation.

1 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body placed in body of stream pump and has locking valve and axial channel for logging cable with fixed logging device. Device also has discharge valve. Device body has ports in middle portion, which connect middle hollow portion of device to displacement chamber for stream pump. In upper and lower portions of body of device upper and lower compactors are placed, limited by support elements on each side of the latter, respectively. Locking valve is mounted in lower portion of device and mated with inner space of tubing string and logging device. Axial channels of valves are eccentric and parallel to first channel of device, while discharge valve is provided with rod with its end prominent relatively to body of device.

EFFECT: broader functional capabilities, higher reliability.

4 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes selection of cable of required rigidity and fixing devices on it. Transporting of devices into well is performed under effect from weight of cable and devices. Cable also contains inner hermetic pipe, which is plugged on both sides prior to lowering cable into well. Liquid is pumped into pipe under pressure through locking valve in upper plug and is kept in pipe under constant pressure during operation. After that cable is lowered with devices fixed to it. Value of pressure of liquid in pipe is determined from formula Ppipe≥ Pwell(Scable/Spipe-1)-QcablexLcable/Spipe<Ptear, where Ppipe - pressure of fluid in pipe, kg-wt/sm2; Scable - cross-section of cable with pipe, sm2; Pwell - hydrostatic pressure of well liquid column at depth of planned delivery of devices on cable, kg-wt/sm2; Spipe - cross-section area of pipe aperture and plug area equal to it in contact with liquid in pipe, sm; Qcable - weight of 1 km of cable with pipe, kg-wt; Lcable - length of cable to depth of planned delivery of devices, km; Ptear - pressure of liquid in pipe leading to tear of cable, kg-wt/sm2, determined from formula: Ptear=Ftear/Spipe, where Ftear - tear force for cable according to documentation, kg-wt.

EFFECT: higher efficiency.

3 cl, 1 dwg, 1 tbl

Profile meter // 2244120

FIELD: geophysics.

SUBSTANCE: device has body, spring-loaded levers jointly connected to it, levers position indicator, made in form of constant magnet mounted at joint connection end of each measuring lever, and signal converter, mounted in body in protective chamber. Constant magnet is made in form of washer and is mounted in circular groove on rotation axis of each lever, and as signal converter magnetic-resistive sensor is used in form of resistive bridge circuit sensitive to direction of magnetic field and non-sensitive to its intensity, while magnetic axis of constant magnet is in plane of washer and is directed perpendicularly to sensitivity axis of magnetic-resistive sensor.

EFFECT: higher precision, simplified construction, lesser dimensions.

3 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body with ports in lower and upper ends, main sensitive elements in form of turbines and packing elements, placed in pairs at body ends, side port made in body between main sensitive elements and converter, connected to surface equipment. In side pipe, mounted inside the body between main sensitive elements, additional sensitive element is placed in form of turbine and thermal sensor. Lower end of side pipe is connected to side port. Diameter of turbine of additional sensitive element is less than diameter of turbines of main sensitive elements. Converter is a control block mounted above body including sleeves locator and electronic microprocessor device.

EFFECT: higher precision.

1 dwg

FIELD: oil and gas production.

SUBSTANCE: invention relates to gas-liquid systems coming from oil production wells. Mixture is separated into liquid and gas in separator. Liquid is periodically accumulated in separator container and then displaced with gas. During this operation, differential pressure for liquid reaching its lower and upper recorded levels and time required for filling recorded volumes are measured as well as absolute pressure and temperature of gas in container. Liquid flow value expressed in weight is calculated using special mathematical dependence. At oil field, liquid and gas enter separator from preliminary gas intake installation or from the first separation step.

EFFECT: increased accuracy of measurement due to avoided gas density registration and excluded necessity of using strictly cylindrically-shaped measuring container.

1 dwg

FIELD: engineering investigations in building, particularly devices for determining deformation and strength properties of ground in well.

SUBSTANCE: device comprises probe (working tip), control-rod, pipeline, communication line, loading jig and measuring station. Probe includes hollow cylindrical body with bottom and cap filled with working liquid, elastic shell sealed from body bottom and top. Formed in non-fixed elastic shell area are perforations. Piston with rod is installed in upper part of hollow body above working liquid. Rod passes through cap in sealed manner. Rod is connected with control rod so that piston may move in axial direction. Formed above piston is cavity connected to pipeline. Hollow body has bottom in which air-tight plug is installed. Measuring device is made as linear piston displacement transducer. Through orifices are formed in hollow body wall near body bottom. Arranged from body outside are vertical or inclined grooves aligned with through orifices by lower ends thereof. Air-tight plug is provided with adjustable rest for restricting piston stroke.

EFFECT: simplified structure of probe and measuring devices, increased operational reliability and improved validity of obtained data.

2 cl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes performing a test pumping of liquid waste into absorbing well before operational pumping, while changing flow step-by-step. From equation of absorption base hydrodynamic parameters are determined for calculation of predicted coefficients of operation characteristics of absorbing well and reserve well. During operational pumping of liquid waste together with thermometry along absorbing well shaft, registration of actual pressures and flow on pump devices, actual pressures on mouth in tubing pipes of absorbing well, actual pressures on face are additionally registered in absorbing well as well as pressures on mouth in behind-pipe space, actual loss at mouth in behind-pipe space, actual loss of waste on mouth, actual positions of face well, upper and lower limits of absorption range from well mouth. In reserve well actual pressures on face are registered, as well as actual positions of liquid level from reserve well mouth, upper and lower limits of absorption range. Prediction coefficients are compared for operation characteristics of absorbing well and reserve well to actual coefficients. 9 conditions of hydrodynamic bed conditions at reserve well and absorbing well are considered during pumping of waste. Specific actions of operator on each condition are described.

EFFECT: higher reliability and trustworthiness.

1 ex

FIELD: geophysics.

SUBSTANCE: method includes lowering protective container to the well to portion of intensive curvature of shaft, which container is fixed at end of drilling pipes, lowering of geophysical device into protective container on lower portion of logging cable, delivery of protective container with geophysical device to pit-face by consecutive extending of drilling pipes column, lowering of upper portion of logging cable through remote-controlled compactor of logging cable fixed on branch of swivel, into drilling pipes, until electric contact to free end of lower portion of logging cable via detachable connecting sleeve, geophysical examining of shaft during raising of geophysical device together with drilling pipes with appropriate connection-disconnection of fixing ends of lower and upper portions of logging cable when screwing away each following drill stand. When examining wells having extensive steeply slanted portion of well shaft with zenith angle of 50°-90°, where lowering of upper portion of logging cable to electrical contact with free end of lower portion of logging cable via detachable connecting sleeve under its own weight is difficult due to friction at drilling column wall, forced lowering of detachable connecting sleeve is performed by feeding washing liquid under pressure into drilling pipes and concurrent adjustment of pressure in chamber of remote-controlled compactor of logging cable. Pressure in chamber of remote-controlled logging cable compactor is achieved to be close to pressure of washing liquid in drilling pipes, to provide for optimal speed of cable lowering and its pressurization, and after connection of detachable connecting sleeve to lower portion of logging cable during raising and lowering of drilling pipes, examinations of well are performed.

EFFECT: higher efficiency.

1 dwg

FIELD: oil extractive industry.

SUBSTANCE: mixture is separated on liquid and gas in separator. Liquid is periodically collected and forced away by gas while measuring absolute pressure and gas temperature in separator tank near upper and lower fixed liquid levels, and times of forcing away of fixed liquid volume. Additionally measured are absolute pressure and temperature in moment when liquid reaches intermediate fixed level. Then liquid is forced from intermediate fixed level to lower fixed level separator is switched off from well, and mass loss of gas is calculated from provided relation. Device for realization of method consists of separator with feeding pipe, in which a three-drive valve is mounted, and draining pipe, which through said valve is connected to liquid outlet channel and to gas outlet channel. Separator is provided with sensors of temperature and pressure and sensors of upper, intermediate and lower levels, mounted in such a manner, that they separate fixed volumes between each other in separator tank, in case of equality of which calculations are simplified.

EFFECT: higher precision.

2 cl, 1 dwg

Up!