RU1778288C - Device for determining filtration parameters of formation - Google Patents

Abstract

Usage: in hydrogeological and engineering-geological studies SUMMARY OF THE INVENTION: the device comprises corrupted. , into the well a level sensor, a surface distributor located on the surface, a tank and a level recorder connected to a level sensor, an ejector in the form of a supply pipe, a nozzle, a mixing chamber, a diffuser and a discharge pipe, a centrifugal pump located on the surface, a diffuser placed in the tank flow with outlet reflector, poppet valve with gasket, drain pipe fixed in the bottom of the tank, located above the drain pipe and attached to the wall e the cylinder with the cap, as well as the rod and piston located in the cylinder and hingedly connected to the poppet valve, the centrifugal pump communicating through the flow distributor with its pressure part with the inlet pipe of the ejector and the piston cavity of the cylinder, and with the receiving part with the lower part of the tank , the lower part of the diffuser flow receiver is connected to the outlet pipe, the drain pipe is in communication with the well, and the ejector is installed in the well. 1 silt 00 00

Description

The invention relates to hydrogeological and engineering-geological surveys and hydraulic engineering construction, in particular to devices for testing aquifers (horizons) in wells to determine their filtration parameters.

Known devices for determining the filtration parameters of formations, including monitoring the change in the water level in the borehole i during test pumpings, outrunning testing, and the use of Plastove testers

The disadvantage of such devices is the low accuracy of determining the filtration parameters of the formations at high expenditures of time for research.

A device is also known for determining the filtration parameters of formations, including changing the water level in the wellbore by pouring a fixed volume of water JQ into it, observing the process of its restoration and, using the well-known formulas of filling and pumping, using filtration 15 characteristics (properties) of rocks uncovered by the well0

The disadvantage of such a device is that it requires water and special containers 20 for its delivery, as well as devices for filling it into the well. In addition, the loading conditions affect the accuracy of the studies and reproducibility of the results, since water in the wellbore depends on the depth of the level, the diameter of the well, the speed of the gulf, the characteristics of the process of draining fluid along the walls of the well, etc. thirty

The closest in technical essence and the achieved result to the proposed is a device for determining the filtration parameters of the formation, including a head with gg sealed unit for connecting to the casing or Filter string and installed on it pipe for connecting the internal cavity of the well with the atmosphere and placed 0 on a pressure gauge and a vacuum gauge, a water level sensor connected by a cable to a recorder, a source of compressed air and a container of water, a separator with a discharge pipe, gas and gas 45 gas-liquid ejectors with receiving and pressure nozzles, diffusers, the receiving nozzle of the gas-gas ejector being hermetically and coaxially inserted into the upper part of the separator, eating a gas-liquid ejector diffuser is connected hermetically to the separator by a tangent to its body, pressure nozzles the ejectors are connected to a source of compressed gas, and the receiving path for cutting the gas-liquid ejector is connected to a water tank

A disadvantage of the known device is the inertia of the vacuum-pneumatic mechanism of action on the well to disturb the water level in it, which affects the accuracy of determining the value of the formation filtration parameters. According to the data reproduced for the prototype, the error can reach 20% or more, depending on the filtration properties of rocks testable aquifer. Comparison of the reservoir parameters of the formation obtained using the proposed device and reproduced for the prototype was carried out with data on cluster pumping previously carried out in these wells at the Yegoryevsky phosphorite deposit in the Moscow Region.

The aim of the invention is to improve the accuracy of determining the filtration parameters of the reservoir 0

This object is achieved in that the device for determining the filtration parameters of the formation, comprising a level sensor lowered into the well, a flow distributor located on the surface, a reservoir and a level recorder connected to a level sensor, an ejector in the form of a supply pipe, nozzle, mixing chamber, diffuser and outlet of the pipeline is equipped with a centrifugal pump located on the surface, a diffuser receiver of the working flow with a reflector at the outlet, a poppet valve with a hollow a gasket, a drain pipe fixed in the bottom of the tank, located above the drain1 pipe and attached to the wall of the tank by a cylinder with a cover, and also a rod and piston placed in the cylinder and hinged to the poppet valve, while 1 centrifugal pump is communicated through its flow distributor the pressure part with the inlet pipe of the ejector and the piston cavity with the lower part of the tank, the lower part of the diffuser flow receiver is connected to the discharge pipe, the drain pipe is communicated with the well, and the ejector is installed in the well 0

The drawing shows the proposed device for determining the filtration parameters of the formation, General view.

The device includes a centrifugal pump 1 mounted on the surface

next to the well 2, the ejector lift, lowered into the well 2, J consisting of a supply pipe) 3, nozzle 4, mixing chamber 5, diffuser | a gap 6 and a discharge pipe 7, a container 8. installed above the well with a drain pipe 9 fixed in its bottom and a diffuser receiver for the working stream 10 located in it, which is connected by a sleeve 11 to the discharge pipe 7 and provided with a reflector at the output 12, attached to the wall of the tank 8 with the help of t, rr of the bracket 13, cylinder 1 with a cover 15, and also placed in the cylinder by a piston 16 and a stem 17, pivotally attached to the stem 17 by a poppet valve 18 with a rubber gasket 19, a pipe 20 connecting the lower part of the tank 8 s reception part of the centrifugal pump 1, the pressure pipe 21 with a flow distributor 22, connecting through the elbow 23

 supply pipe 3.

Water, from10

fifteen

twenty

pumped from the tank 8, above the pressure is supplied to the nozzle kt and from there along with the ejected water from the borehole 2 it enters the mixing chamber 5, a diffuser 6, a discharge pipe 7, a diffuser receiver of the working stream 10, and then from under the reflector 12 into the tank 8 “In this case, the water level 28 in the tank 8 begins to rise rapidly. When the water level reaches 28 the lower edges of the reflector 12, the centrifugal pump turns off. At this point, due to the withdrawal of water from the well 2, the static water level 32 will sharply decrease to position 33 and the process of its restoration will begin, the end of the level restoration is considered the time when the level water 33 in the well does not reach static 32 by a value amounting to less than 5% of the value of its change 0 After restoration of the water level

and a sleeve 2 with a supply pipe 25 to the well 2 associated with its removal

J) | r

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 supply pipe 3.

Water, from10

fifteen

twenty

pumped from the tank 8, above the pressure is supplied to the nozzle kt and from there along with the ejected water from the borehole 2 it enters the mixing chamber 5, a diffuser 6, a discharge pipe 7, a diffuser receiver of the working stream 10, and then from under the reflector 12 into the tank 8 “In this case, the water level 28 in the tank 8 begins to rise rapidly. When the water level reaches 28 the lower edges of the reflector 12, the centrifugal pump turns off. At this point, due to the withdrawal of water from the well 2, the static water level 32 will sharply decrease to position 33 and the process of its restoration will begin, the end of the level restoration is considered the time when the level water 33 in the well does not reach static 32 by a value amounting to less than 5% of the value of its change 0 After restoration of the water level

25 d well 2 associated with its withdrawal

3, a pipe 25 connecting the flow distributor 22 to the piston cavity 26 of cylinder 1, a sleeve 27 that discharges water 28 from the tank 8 through a drain pipe 9 into the well 2, a water level sensor 29 located in the well, a device 30 registering the position and changes in the water level in the well 2, a cable 31 connecting the sensor 29 to the device 30 about

The device operates as follows

A water level sensor 29 is lowered into the well 2 prepared for testing on the cable 31 by a depth of 1-2 m more than the value of the possible disturbance of the level 29, and the sensor 29 is connected via cable 31 to the secondary device 30 to record the position and change of the water level in well 2 “Then, an ejector lift () is lowered into the well 2 at approximately the same depth and a tank 8 is mounted at the mouth with all pipelines, ejector units and taps (9-27), as well as a centrifugal pump 10. After that, the pressure distributor 22 is closed by the flow distributor 22 the piping 21 (position a), a small amount of water is poured into the container 8 and using the flow distributor 22 communicate (position b) the pressure part of the centrifugal pump 1 through the pressure pipe wire 21, elbow 23 and sleeve 2k j:

a certain amount from the well, the opposite effect is performed, that is, this water is poured from the tank 8 into the well 2 o. For this, the flow distributor 22 is informed of the pressure pipe 21 with the pipe 25 (position c) and the centrifugal pump 1 is turned on. As a result, water from tank 8 through pump 1 flows under pressure

into the piston cavity 26 of cylinder 1, the piston 16 slides up to the stop with the cover 15, the poppet valve 18 instantly decompresses the drain pipe 9 and water 28 through this pipe

and the sleeve 27 enters the well 2 “When the water level 28 in the tank 8 drops to the upper edges of the drain pipe 9, the centrifugal pump 1 is turned off and the process of restoring the water level 3 in the well 2 to the static 32 is recorded using the level sensor 29 on the device 30. Such a scheme allows you to drastically increase the speed of filling water into the well in comparison with

ordinary gravity withdrawal of it from the tank,

, "V. . . L

After the experiment, the tank 8 is first dismantled with all pipelines, ejector units and taps (9-27), the centrifugal pump 1 is disconnected, and then the ejector lift (3-7) is removed from the well 2 and the water level sensor 29 is installed on cable 31

The magnitude of the filtration or water conductivity coefficient is calculated according to the existing hydrodynamic dependences (formulas) for experimental fillings or pumpings according to the data of recovery curves for the water level in wells obtained after its perturbation by the proposed device. For calculations, the arithmetic mean values obtained by lowering and increasing the level of, (Using the proposed device allows to increase the accuracy of determining the filtration parameters of aquifers (horizons) due to Practical instantaneous change the water level in the well by rapid withdrawal from the borehole, or subsequent discharge into it strictly Li- mitirovannyh (binary) data volume of water conditions more fully correspond to the calculated dependence of M obtained when solving the mathematical problem describing the natural process ny.,

A comparison of the results of determination using the proposed device and the reproduced data for the prototype with the most reliable results obtained by cluster pumping was carried out along a series of wells at the Yegoryevsky phosphorite deposit in the Moscow region. Moreover, the error in determining the value of the conductivity coefficient is respectively for the proposed device 6.5-11.2, and for the prototype 11.5-21%. Thus, the use of the proposed device will increase the accuracy of the determined parameters by 5-10% due to the most accurate correspondence of the formulation conditions and the solution of the mathematical problem that describes this process. In addition,

the use of the proposed device improves the operating conditions, since the device is compact and mobile, does not pollute the environment ,,

The expected annual economic effect from the introduction of the proposed device for determining the filtration parameters of the formation for 00 tests will be more than 100 thousand rubles

Claims (1)

SUMMARY OF THE INVENTION A device for determining formation filtration parameters, comprising a dip sensor lowered into the well, a flow distributor located on the surface, and a reservoir connected to. level sensor, recorder, level, ejector in the form of a supply. pipe, nozzle, mixing chamber, diffuser and outlet pipe, characterized in that, in order to increase accuracy, it is equipped with a centrifugal pump located on the surface, placed in the tank with a diffuser receiver of the working stream with an outlet reflector, a poppet valve with a gasket, a drain secured with a branch pipe ((“in the bottom of the tank, located above the drain pipe and attached to the wall of the tank by a cylinder with a cover, and also placed in the cylinder and pivotally connected to the with a rod and piston, while the centrifugal pump is connected via pac-j to the flow limiter with its pressure part with the supply pipe of the ejector and the piston cavity of the cylinder, and the receiving part with the lower part of the tank, the lower part of the diffuser flow receiver is connected to the water by the pipeline, the drain sodium is connected to the well, and the ejector is installed in the well 16 IS 12 , 8 22ppa ..2522 ™ & r5 „/ 90 OfcT L / 21 Z.o 25 23 22 poses & / V20