CN209457932U - A kind of cave-in device for pressure measurement after simulating the water enchroachment (invasion) that seepage field changes - Google Patents
A kind of cave-in device for pressure measurement after simulating the water enchroachment (invasion) that seepage field changes Download PDFInfo
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- CN209457932U CN209457932U CN201822030873.3U CN201822030873U CN209457932U CN 209457932 U CN209457932 U CN 209457932U CN 201822030873 U CN201822030873 U CN 201822030873U CN 209457932 U CN209457932 U CN 209457932U
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Abstract
The utility model discloses cave-in device for pressure measurement after a kind of water enchroachment (invasion) of simulation seepage field variation, it is characterized by comprising stratum analog module, circulation of drilling fluid module, pressure control module and data processing modules, pressure control module is respectively acting on stratum analog module and circulation of drilling fluid module, and data processing module detects permeability of stratum analog module under the action of pressure control module.Cave-in pressure measurement device configurations are simple after a kind of water enchroachment (invasion) of simulation seepage field variation provided by the utility model, and easy to use, manufacturing cost is lower, and data measured is accurate；Pass through the water influx of simulation core under the conditions of the different permeabilities of measurement, and corresponding cave-in pressure size under different water influxs, to establish the corresponding relationship that permeability, water influx, caving pressure change over time, there is certain directive significance to the Rational choice of construction site drilling fluid density.
Description
Technical field
The utility model belongs to the technical field of borehole well instability research in mud shale drilling process, and in particular to a kind of simulation
Cave-in device for pressure measurement after the water enchroachment (invasion) of seepage field variation.
Background technique
In recent years, with the increasingly failure of conventional gas and oil resource, before shale oil gas is because of its huge oil in place and exploitation
Scape and be concerned.But many technical problems is still had in shale gas exploitation field, such as in drilling engineering, meet mud when boring
When shale reservoir, the borehole well instability problem as caused by mud shale water enchroachment (invasion) is particularly troublesome, according to the preliminary statistics, industrial gas oil
Every year because borehole well instability problem bring economic loss is as high as hundred million dollars of 8-10, therefore reinforce the well in mud shale drilling process
Wall destabilization problems theory and the research of experiment aspect are extremely urgent.
The influence factor that water enchroachment (invasion) occurs for mud shale has capillary force, chemical potential, the pressure field in deep formation, temperature field, infiltration
Flow field etc. is based on this, and utility model device has added temperature control system and control pressurer system, simulates real well operating condition
The high temperature and high pressure environment on lower stratum.Belong to rock build-in attribute additionally, due to permeability, numerical values recited is immutable, so at this
In device, intrinsic fracture is simulated with the contact face of adjacent two simulation core, is reduced by pressing to simulation core both ends
The aperture of simulation fracture, to indirectly change the permeability value of whole simulation core.
Mud shale main component be various clay minerals, such as montmorillonite, illite, kaolinite, and stratification plane of weakness compared with
Development, mechanical property is unstable, therefore compared to other rocks, has its exclusive characteristic, predominantly water swelling, drilling well
Water phase in liquid can enter between the crystal layer of clay minerals, so that solid particle volume expansion, pore pressure increases, to make
Well week, primary stress field changed, and rock mechanics parameters change, and eventually led to a series of complex work such as undergauge and collapsing
The generation of condition substantially prolongs the wellbore construction period, increases drillng operation cost.
Rock mechanics parameters and crustal stress size are all related with water influx, and the size of caving pressure directly determines construction
The lower limit of drilling fluid density window in the process, therefore a set of temperature, pressure environment of design is controllable, permeability is variable, and water influx is collapsed
Cave-in device for pressure measurement after the measurable water enchroachment (invasion) of pressure of collapsing occurs becomes more and more important.
Utility model content
The purpose of this utility model is to solve the above problems, and it is simple to provide a kind of structure, easy to use, manufacturing cost compared with
It is low, cave-in device for pressure measurement after the water enchroachment (invasion) of seepage field variation can be simulated.
In order to solve the above technical problems, the technical solution of the utility model is: it is a kind of simulation seepage field variation water enchroachment (invasion) after
Cave-in device for pressure measurement, including stratum analog module, circulation of drilling fluid module, pressure control module and data processing mould
Block, pressure control module are respectively acting on stratum analog module and circulation of drilling fluid module, and data processing module detects stratum mould
Quasi- permeability of module under the action of pressure control module.
Preferably, the simulation core that the stratum analog module includes autoclave and quantity is three, simulation core are located at height
The inside of kettle is pressed, the contact face of adjacent analog rock core forms simulation fracture.
Preferably, the circulation of drilling fluid module include simulation wellbore hole, clear water fluid reservoir, liquid infusion pump, fluid reservoir and
Liquid circulation kinetic pump, simulation wellbore hole are arranged in autoclave, and simulation core is located at autoclave, and simulation core is cylindrical body knot
Structure, and its arc-shaped outer wall is directly contacted with simulation wellbore hole；The upper end of simulation wellbore hole is connected to by high bearing pipe with fluid reservoir,
The lower end of simulation wellbore hole is connected to by high bearing pipe with the end of liquid circulation kinetic pump, the other end of liquid circulation kinetic pump
It is connected to by high bearing pipe with fluid reservoir, fluid reservoir is connected to by high bearing pipe with liquid infusion pump, and liquid infusion pump is logical
Excessively high bearing pipe is connected with clear water fluid reservoir, and the liquid inside clear water fluid reservoir is injected in fluid reservoir by liquid infusion pump,
Liquid in fluid reservoir is entered in simulation wellbore hole by high bearing pipe, then by returning to liquid storage after liquid circulation kinetic pump
In tank.
Preferably, between the fluid reservoir and liquid infusion pump be equipped with the 6th valve, the 6th valve can control fluid reservoir with
The connection and disconnection of high bearing pipe between liquid infusion pump；The 7th valve is equipped between fluid reservoir and liquid circulation kinetic pump,
7th valve controls the connection and disconnection of high bearing pipe between fluid reservoir and liquid circulation kinetic pump；Simulation wellbore hole and fluid reservoir
Between high bearing pipe be equipped with the 5th pressure gauge, the 5th pressure gauge is used to monitor pressure between simulation wellbore hole and fluid reservoir
Value.
Preferably, the pressure control module includes compression steel plate, high-pressure nitrogen bottle, sealing rubber pad, first gas note
Enter valve group, second gas injection valve group and third gas injection valve group, sealing rubber pad and be located at the both ends of compression steel plate, pressurize steel
Plate is located at the inside of autoclave, and the quantity of compression steel plate is two and is distributed in the both ends of simulation core, and third gas injects valve group
It is identical as the first gas injection structure of valve group；Another side and third gas positioned at the compression steel plate of simulation core top inject
Valve group is connected, and the another side of the compression steel plate following positioned at simulation core is connected with first gas injection valve group；First gas note
Enter after valve group is connected with third gas injection valve group by pipeline and is connected with high-pressure nitrogen bottle by high bearing pipe, high pressure nitrogen
Bottle injects valve group with second gas by high bearing pipe and is connected, and the other end that second gas injects valve group passes through autoclave and mould
Quasi- rock core is connected.
Preferably, the high bearing pipe between the high-pressure nitrogen bottle and second gas injection valve group is equipped with third valve
Door, third valve control the connection and disconnection of high bearing pipe between high-pressure nitrogen bottle and second gas injection valve group；Elevated pressure nitrogen
Gas cylinder and third gas injection valve group between high bearing pipe be equipped with the first valve, the first valve control high-pressure nitrogen bottle with
Third gas injects the connection and disconnection of high bearing pipe between valve group, between high-pressure nitrogen bottle and first gas injection valve group
High bearing pipe is equipped with the 5th valve, and the 5th valve controls high pressure-bearing pipe between high-pressure nitrogen bottle and first gas injection valve group
The connection and disconnection in road, high bearing pipe where the first valve merge with the high bearing pipe in the 5th valve place after with high pressure nitrogen
The 4th valve is equipped between the connected high bearing pipe of bottle, high pressure-bearing where high bearing pipe where the first valve and the 5th valve
Connection and disconnection after pipeline merging between high bearing pipe and high-pressure nitrogen bottle are controlled by the 4th valve.
Preferably, the high bearing pipe that the high-pressure nitrogen bottle is connected to third gas injection valve group is equipped with first pressure
Table, first pressure gauge are used to detect high-pressure nitrogen bottle and third gas and inject the pressure that valve group is connected in high bearing pipe, i.e., plus
Laminated steel is applied to the pressure value on simulation core.
Preferably, the top of the fluid reservoir is equipped with the 4th gas injection valve group, and high-pressure nitrogen bottle and third gas are injected
The high bearing pipe of valve group connection is connected with the 4th gas injection valve group by high bearing pipe, high-pressure nitrogen bottle and third gas
It injects the high bearing pipe that valve group is connected to and is equipped with the second valve the high bearing pipe that the 4th gas injection valve group is connected, second
The connection and disconnection of pipeline where valve controls itself.
Preferably, the data processing module includes displacement sensor, data collection station, power supply, resistance board and surveys pressure
Probe, displacement sensor are equally spaced and are tightly attached to after simulation core side wall is concatenated and be electrically connected with data collection station, resistance
The end of plate passes through autoclave and is connected with simulation core, and the other end of resistance board is electrically connected by power supply with data collection station,
It surveys pressure probe end and passes through and be connected inside autoclave and simulation wellbore hole, survey position and displacement of the pressure probe inside simulation wellbore hole and pass
The position of sensor is contour and is arranged symmetrically, and the other end for surveying pressure probe is electrically connected with data collection station, data collection station point
It is not electrically connected with first pressure gauge and the 5th pressure gauge.
Preferably, the quantity that the survey pressure is popped one's head in is three, and the survey that quantity is three is pressed to divide between probe and data collection station
Not She You second pressure gauge, third pressure gauge and the 4th pressure gauge, second pressure gauge detection be located at autoclave top survey press visit
Data measured by head, the detection of third pressure gauge are located at the measured data of survey pressure probe in the middle part of autoclave, the detection of the 4th pressure gauge
Positioned at the measured data of survey pressure probe of autoclave base.
The beneficial effects of the utility model are: well after a kind of water enchroachment (invasion) of simulation seepage field variation provided by the utility model
Wall caving pressure measuring device structure is simple, and easy to use, manufacturing cost is lower, and data measured is accurate；By measuring different infiltrations
Corresponding cave-in pressure size under the water influx of simulation core, and different water influxs under the conditions of saturating rate, to establish infiltration
The corresponding relationship that saturating rate, water influx, caving pressure change over time has one to the Rational choice of construction site drilling fluid density
Fixed directive significance.
Detailed description of the invention
Fig. 1 is that the structure of cave-in device for pressure measurement is shown after a kind of water enchroachment (invasion) of simulation seepage field variation of the utility model
It is intended to.
Description of symbols: 1, autoclave；2, simulation wellbore hole；3, displacement sensor；4, compression steel plate；5, the first valve；
6, the second valve；7, data collection station；8, first pressure gauge；9, power supply；10, resistance board；11, third valve；12, elevated pressure nitrogen
Gas cylinder；13, the 4th valve；14, sealing rubber pad；15, the 5th valve；16, first gas injects valve group；17, second gas is infused
Enter valve group；18, simulation core；19, simulation fracture；20, second pressure gauge；22, third pressure gauge；23, the 4th pressure gauge；24,
5th pressure gauge；25, the 4th gas injects valve group；26, fluid reservoir；27, the 6th valve；28, liquid infusion pump；29, clear water stores up
Flow container；30, the 7th valve；31, liquid circulation kinetic pump；161, third gas injects valve group.
Specific embodiment
The utility model is described further in the following with reference to the drawings and specific embodiments:
As shown in Figure 1, cave-in pressure measurement after a kind of water enchroachment (invasion) of simulation seepage field variation provided by the utility model
Device, including stratum analog module, circulation of drilling fluid module, pressure control module and data processing module, pressure control module
It is respectively acting on stratum analog module and circulation of drilling fluid module, data processing module detects stratum analog module and controls in pressure
Permeability under the action of module, temperature change, pressure change etc..
The simulation core 18 that stratum analog module includes autoclave 1 and quantity is three, simulation core 18 are located at autoclave 1
The contact face of inside, adjacent analog rock core 18 forms simulation fracture 19.It in actual use, can be according to actual use need
The block number and size for modifying simulation core 18, can to increase penetration value to obtaining the simulation fracture 19 of different number
It adjusts range and is closer to actual formation environment.
Circulation of drilling fluid module includes simulation wellbore hole 2, fluid reservoir 26, liquid infusion pump 28, clear water fluid reservoir 29 and liquid
Circulation power pump 31, simulation wellbore hole 2 is arranged in autoclave 1.Simulation core 18 is located inside autoclave 1, and simulation core 18 is circle
Column structure and its arc-shaped outer wall is directly contacted with simulation wellbore hole 2.The upper end of simulation wellbore hole 2 passes through high bearing pipe and liquid storage
Tank 29 is connected to, and the lower end of simulation wellbore hole 2 is connected to by high bearing pipe with the end of liquid circulation kinetic pump 31.Liquid circulation is dynamic
The other end of power pump 31 is connected to by high bearing pipe with fluid reservoir 29, and fluid reservoir 29 passes through high bearing pipe and liquid infusion pump
28 connections, liquid infusion pump 28 are connected by high bearing pipe with clear water fluid reservoir 26, and the liquid inside clear water fluid reservoir 26 is logical
Liquid infusion pump 28 to be crossed to inject in fluid reservoir 29, the liquid in fluid reservoir 29 is entered in simulation wellbore hole 2 by high bearing pipe, then
By being returned in fluid reservoir 29 after liquid circulation kinetic pump 31.
It is carved with scale on the outer surface of clear water fluid reservoir 26 and fluid reservoir 29, during utility model works, behaviour
Water influx, calculation method can be calculated according to the liquid volume changing value in fluid reservoir 29 and clear water fluid reservoir 26 by making personnel
Are as follows: water influx=fluid reservoir original liquid volume+clear water injected slurry volume-final liquid volume of fluid reservoir.
The 6th valve 27 is equipped between fluid reservoir 29 and liquid infusion pump 28, the 6th valve 27 can control fluid reservoir 29 and liquid
The connection and disconnection of high bearing pipe between body injection pump 28；The 7th valve is equipped between fluid reservoir 29 and liquid circulation kinetic pump 31
Door 30, the 7th valve 30 control the connection and disconnection of high bearing pipe between fluid reservoir 29 and liquid circulation kinetic pump 31；Simulation
High bearing pipe between pit shaft 2 and fluid reservoir 29 is equipped with the 5th pressure gauge 24, and the 5th pressure gauge 24 is for monitoring simulation well
Pressure value between cylinder 2 and clear water fluid reservoir 29.
Pressure control module includes compression steel plate 4, high-pressure nitrogen bottle 12, sealing rubber pad 14, first gas injection valve group
16, second gas injection valve group 17 and third gas inject valve group 161, and sealing rubber pad 14 is located at the both ends of compression steel plate 4, adds
Laminated steel 4 is located at the inside of autoclave 1, and the quantity of compression steel plate 4 is two and is distributed in the both ends of simulation core 18, third gas
It is identical as the first gas injection structure of valve group 16 to inject valve group 161；Positioned at 18 top of simulation core compression steel plate 4 it is another
It is connected on one side with third gas injection valve group 161, the another side and first gas of the compression steel plate 4 following positioned at simulation core 18
Valve group 16 is injected to be connected；First gas is injected after valve group 16 is connected with third gas injection valve group 161 by pipeline and elevated pressure nitrogen
Gas cylinder 12 is connected by high bearing pipe, and high-pressure nitrogen bottle 12 injects valve group 17 with second gas by high bearing pipe and is connected,
The other end of second gas injection valve group 17 passes through autoclave 1 and is connected with simulation core 18.Filled with height inside high-pressure nitrogen bottle 12
It calms the anger body, high pressure gas can be passed through high pressure gas to the high bearing pipe being connected to high-pressure nitrogen bottle 12 by high-pressure nitrogen bottle 12
Relevant work is completed in body.
High bearing pipe between high-pressure nitrogen bottle 12 and second gas injection valve group 17 is equipped with third valve 11, third
Valve 11 controls the connection and disconnection of high bearing pipe between high-pressure nitrogen bottle 12 and second gas injection valve group 17.High pressure nitrogen
High bearing pipe between bottle 12 and third gas injection valve group 161 is equipped with the first valve 5, and the first valve 5 controls elevated pressure nitrogen
The connection and disconnection of high bearing pipe, high-pressure nitrogen bottle 12 and first gas between gas cylinder 12 and third gas injection valve group 161
The high bearing pipe injected between valve group 16 is equipped with the 5th valve 15, and the 5th valve 15 controls high-pressure nitrogen bottle 12 and the first gas
Body injects the connection and disconnection of high bearing pipe between valve group 16, high bearing pipe and 15 institute of the 5th valve where the first valve 5
The 4th valve 13, the first valve 5 are equipped between the high bearing pipe being connected after the merging of high bearing pipe with high-pressure nitrogen bottle 12
After high bearing pipe merges where the high bearing pipe in place and the 5th valve 15 between high bearing pipe and high-pressure nitrogen bottle 12
Connection is controlled with disconnection by the 4th valve 13.
The high bearing pipe that high-pressure nitrogen bottle 12 is connected to third gas injection valve group 161 is equipped with first pressure gauge 8, the
One pressure gauge 8 is used to detect high-pressure nitrogen bottle 12 and third gas and injects the pressure that valve group 161 is connected in high bearing pipe, i.e., plus
Laminated steel 4 is applied to the pressure value on simulation core 18.
The top of fluid reservoir 29 is equipped with the 4th gas and injects valve group 25, and high-pressure nitrogen bottle 12 and third gas inject valve group
The high bearing pipe of 161 connections is connected with the 4th gas injection valve group 25 by high bearing pipe, high-pressure nitrogen bottle 12 and third
The high bearing pipe that the high bearing pipe that gas injection valve group 161 is connected to is connected with the 4th gas injection valve group 25 is equipped with second
Valve 6, the connection and disconnection of pipeline where the second valve 6 control itself.
Data processing module includes displacement sensor 3, data collection station 7, power supply 9, resistance board 10 and surveys pressure probe 21,
Displacement sensor 3 is equally spaced and is tightly attached to after 18 side wall of simulation core is concatenated and is electrically connected with data collection station 7.In this implementation
In example, the quantity of displacement sensor 3 is three, equidistantly distributes and is tightly attached to the side wall of simulation core 18, post displacement sensor 3
The side wall of simulation core 18 directly contacted with simulation wellbore hole 2.Adjacent displacement sensor 3 is connected and is acquired by conducting wire and data
Terminal 7 is electrically connected.The end of resistance board 10 passes through autoclave 1 and is connected with simulation core 18, and the other end of resistance board 10 passes through electricity
Source 9 is electrically connected with data collection station 7.The quantity of resistance board 10 be two respectively be located at autoclave 1 inside simulation core 18
It is connected.Resistance board 10 generates heat in 9 galvanization of power supply, increases the temperature of simulation core 18.Survey 21 ends of pressure probe
It is connected inside autoclave 1 and simulation wellbore hole 2, surveys position and displacement sensor 3 of the pressure probe 21 inside simulation wellbore hole 2
Position is contour and is arranged symmetrically.The other end for surveying pressure probe 21 is electrically connected with data collection station 7, and data collection station 7 is distinguished
It is electrically connected with first pressure gauge 8 and the 5th pressure gauge 24.
The quantity for surveying pressure probe 21 is three, is respectively equipped between the survey pressure probe 21 that quantity is three and data collection station 7
Second pressure gauge 20, third pressure gauge 22 and the 4th pressure gauge 23, the detection of second pressure gauge 20 are located at the survey pressure on 1 top of autoclave
Data measured by probe 21, the detection of third pressure gauge 22 are located at data measured by the survey pressure probe 21 at 1 middle part of autoclave, the 4th pressure
The detection of power table 23 is located at data measured by the survey pressure probe 21 of 1 bottom of autoclave.
First pressure gauge 8, displacement sensor 3, second pressure gauge 20, third pressure gauge 22, the 4th pressure gauge the 23, the 5th pressure
Data measured by power table 24 pass through data collection station 7 and carry out data processing and carry out relevant control.In the present embodiment,
Displacement sensor 3, compression steel plate 4, the first valve 5, the second valve 6, data collection station 7, first pressure gauge 8；Power supply 9, electricity
Baffle-wall 10, third valve 11, high-pressure nitrogen bottle 12, the 4th valve 13, the 5th valve 15, first gas inject valve group 16, second
Gas injects valve group 17, simulation core 18, second pressure gauge 20, third pressure gauge 22, the 4th pressure gauge 23, the 5th pressure gauge
24, the 4th gas injection valve group 25, the 6th valve 27, liquid infusion pump 28, the 7th valve 30, liquid circulation kinetic pump 31 and the
It is existing mature technology equipment that three gases, which inject valve group 161,.
The working principle of the utility model in order to facilitate understanding now describes the course of work of the utility model one time:
The first step opens AC power source, so that temperature is reached preset value T to the heating of simulation core 18 by resistance board 10,
Middle T is the code name of temperature value.
Second step opens third valve 11, injects valve group 17 by second gas and reaches preset value to the pressurization of simulation core 18
P1, wherein P1 is the pressure value inside simulation core 18.
Third step closes third valve 11, opens the second valve 6 and the 4th valve 13, injects valve group 25 by the 4th gas
Injecting high pressure gas to fluid reservoir 29 makes pressure in circulation of drilling fluid module reach preset value P2, and wherein P2 is pressure value, can be close
It is seemingly head of liquid value in simulation wellbore hole 2；As P1 > P2, whole equipment is in simulation under balance pressure drilling condition；Work as P1=P2
When, whole equipment is in simulation balance drilling conditions；As P1 < P2, whole equipment is in simulation Overbalance Drilling condition.
4th step closes third valve 11 and the second valve 6, opens the first valve 5, the 4th valve 13 and the 5th valve
15, valve group 16 is injected by first gas and third gas injects valve group 161 and pressurizes respectively to compression steel plate 4, compression steel plate 4 is pressed
Contracting simulation core 18 reduces the aperture of simulation fracture 19, and the simulation rock under corresponding pressure is calculated by the preparation before testing
Heart permeability, pressure value can freely be set in the present embodiment, to study the water enchroachment (invasion) situation under the conditions of different seepage flow.Open the
Seven valves 30 and liquid circulation kinetic pump 31, make the fluid in circulation of drilling fluid module start to flow, real-time monitoring fluid reservoir 29
Liquid volume variation in clear water fluid reservoir 26, can calculate water influx.
5th step opens the 6th valve 27 and liquid infusion pump 28, and clear water is added into circulation of drilling fluid module, reduces and bores
Well liquid density accelerates cave-in speed to achieve the purpose that reduce head of liquid in simulation wellbore hole 2.
6th step, with water enchroachment (invasion) process occur and simulation wellbore hole 2 in head of liquid reduction, the borehole wall can collapse quickly
It collapses, displacement is so that it is determined that the position to collapse, the pressure in addition collapsed a little at 7 real-time monitoring of the data collection station simulation borehole wall
Power can be read respectively by second pressure gauge 20, third pressure gauge 22 and the 4th pressure gauge 23, second pressure gauge 20, third pressure gauge
22 and the 4th the pressure value of pressure gauge 23 be caving pressure value, finally establish permeability, water influx, pair between caving pressure
It should be related to.
In the present embodiment, it being pressed from compression steel plate 4 to simulation core 18,19 compression aperture of simulation fracture is gradually reduced,
To achieve the purpose that change 18 permeability of whole simulation core.To obtain the permeability specific value under the conditions of different pressures,
The method of use is darcy experiment, measures the permeability value under several groups of pressurized conditions, is then obtained by the method for linear fit
Relational expression between pressure value and permeability out.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this reality
With novel principle, it should be understood that the scope of the present invention is not limited to such specific embodiments and embodiments.
Those skilled in the art can be made according to the technical disclosures disclosed by the utility model it is various do not depart from it is practical
Novel substantive various other specific variations and combinations, these variations and combinations are still within the protection scope of the present invention.
Claims (4)
1. cave-in device for pressure measurement after a kind of water enchroachment (invasion) of simulation seepage field variation, it is characterised in that: simulated including stratum
Module, circulation of drilling fluid module, pressure control module and data processing module, pressure control module are respectively acting on stratum simulation
Module and circulation of drilling fluid module, data processing module detect infiltration of stratum analog module under the action of pressure control module
Rate；
The simulation core (18) that the stratum analog module includes autoclave (1) and quantity is three, simulation core (18) are located at height
The inside of kettle (1) is pressed, the contact face of adjacent analog rock core (18) forms simulation fracture (19)；
The circulation of drilling fluid module includes simulation wellbore hole (2), clear water fluid reservoir (26), liquid infusion pump (28), fluid reservoir
(29) it is arranged in autoclave (1) with liquid circulation kinetic pump (31), simulation wellbore hole (2), simulation core (18) side wall and simulation well
Cylinder (2) directly contacts；The upper end of simulation wellbore hole (2) is connected to by high bearing pipe with fluid reservoir (29), under simulation wellbore hole (2)
End is connected to by high bearing pipe with the end of liquid circulation kinetic pump (31), and the other end of liquid circulation kinetic pump (31) passes through
High bearing pipe is connected to fluid reservoir (29), and fluid reservoir (29) is connected to by high bearing pipe with liquid infusion pump (28), liquid
Injection pump (28) is connected by high bearing pipe with clear water fluid reservoir (26), and the internal liquid of clear water fluid reservoir (26) passes through liquid
Injection pump (28) injects in fluid reservoir (29), and the liquid in fluid reservoir (29) is entered in simulation wellbore hole (2) by high bearing pipe,
Again by being returned in fluid reservoir (29) after liquid circulation kinetic pump (31)；
The pressure control module includes compression steel plate (4), high-pressure nitrogen bottle (12), sealing rubber pad (14), first gas note
Enter valve group (16), second gas injection valve group (17) and third gas injection valve group (161), sealing rubber pad (14) is located at pressurization
The both ends of steel plate (4), compression steel plate (4) are located at the inside of autoclave (1), and the quantity of compression steel plate (4) is two and is distributed in mould
The both ends of quasi- rock core (18), it is identical as the first gas injection structure of valve group (16) that third gas injects valve group (161)；Positioned at mould
The another side of the compression steel plate (4) of quasi- rock core (18) top is connected with third gas injection valve group (161), is located at simulation core
(18) another side of following compression steel plate (4) is connected with first gas injection valve group (16)；First gas injects valve group (16)
It is connected with high-pressure nitrogen bottle (12) by high bearing pipe after being connected with third gas injection valve group (161) by pipeline, high pressure
Nitrogen cylinder (12) is connected by high bearing pipe with second gas injection valve group (17), and second gas injects the another of valve group (17)
End is connected across autoclave (1) with simulation core (18)；
High bearing pipe between the high-pressure nitrogen bottle (12) and second gas injection valve group (17) is equipped with third valve
(11), third valve (11) control high-pressure nitrogen bottle (12) and second gas inject the connection of high bearing pipe between valve group (17)
With disconnection；High bearing pipe between high-pressure nitrogen bottle (12) and third gas injection valve group (161) is equipped with the first valve
(5), the first valve (5) control high-pressure nitrogen bottle (12) and third gas inject the connection of high bearing pipe between valve group (161)
With disconnection, the high bearing pipe between high-pressure nitrogen bottle (12) and first gas injection valve group (16) is equipped with the 5th valve
(15), the 5th valve (15) control high-pressure nitrogen bottle (12) and first gas inject the connection of high bearing pipe between valve group (16)
With disconnection, high bearing pipe where the first valve (5) merge with the high bearing pipe in the 5th valve (15) place after with high pressure nitrogen
The 4th valve (13), high bearing pipe and the 5th valve where the first valve (5) are equipped between the connected high bearing pipe of bottle (12)
Connection and disconnection after high bearing pipe merges where door (15) between high bearing pipe and high-pressure nitrogen bottle (12) pass through the 4th
Valve (13) control；
The high bearing pipe that the high-pressure nitrogen bottle (12) is connected to third gas injection valve group (161) is equipped with first pressure gauge
(8), first pressure gauge (8) is connected to high bearing pipe with third gas injection valve group (161) for detecting high-pressure nitrogen bottle (12)
In pressure, i.e. compression steel plate (4) is applied to the pressure value on simulation core (18)；
The data processing module includes displacement sensor (3), data collection station (7), power supply (9), resistance board (10) and surveys
Pressure probe (21), displacement sensor (3), which is equally spaced and is tightly attached to simulation core (18) side wall, is concatenated the acquisition of rear and data eventually
End electrical connection, the end of resistance board (10) pass through autoclave (1) and are connected with simulation core (18), and the other end of resistance board (10) is logical
It crosses power supply (9) to be electrically connected with data collection station (7), surveys pressure probe (21) end and pass through in autoclave (1) and simulation wellbore hole (2)
Portion is connected, survey pressure probe (21) contour and symmetrical cloth in the position of the internal position of simulation wellbore hole (2) and displacement sensor (3)
Set, survey pressure probe (21) the other end be electrically connected with data collection station (7), data collection station (7) respectively with first pressure
Table (8) and the electrical connection of the 5th pressure gauge (24).
2. cave-in device for pressure measurement after a kind of water enchroachment (invasion) of simulation seepage field variation according to claim 1, special
Sign is: the 6th valve (27) is equipped between the fluid reservoir (29) and liquid infusion pump (28), the 6th valve (27) can control
The connection and disconnection of high bearing pipe between fluid reservoir (29) and liquid infusion pump (28)；Fluid reservoir (29) and liquid circulation power
It pumps and is equipped with the 7th valve (30) between (31), the 7th valve (30) controls between fluid reservoir (29) and liquid circulation kinetic pump (31)
The connection and disconnection of high bearing pipe；High bearing pipe between simulation wellbore hole (2) and fluid reservoir (29) is equipped with the 5th pressure
Table (24), the 5th pressure gauge (24) are used to monitor the pressure value between simulation wellbore hole (2) and fluid reservoir (29).
3. cave-in device for pressure measurement after a kind of water enchroachment (invasion) of simulation seepage field variation according to claim 1, special
Sign is: the top of the fluid reservoir (29) is equipped with the 4th gas injection valve group (25), high-pressure nitrogen bottle (12) and third gas
The high bearing pipe of injection valve group (161) connection is connected with the 4th gas injection valve group (25) by high bearing pipe, elevated pressure nitrogen
The height that gas cylinder (12) is connected with the high bearing pipe of third gas injection valve group (161) connection with the 4th gas injection valve group (25)
Bearing pipe is equipped with the second valve (6), the connection and disconnection of pipeline where the second valve (6) controls itself.
4. cave-in device for pressure measurement after a kind of water enchroachment (invasion) of simulation seepage field variation according to claim 1, special
Sign is: the quantity for surveying pressure probe (21) is three, between the survey pressure probe (21) that quantity is three and data collection station (7)
It is respectively equipped with second pressure gauge (20), third pressure gauge (22) and the 4th pressure gauge (23), second pressure gauge (20) detection is located at
Data measured by the survey pressure probe (21) on autoclave (1) top, third pressure gauge (22) detection are located at the survey in the middle part of autoclave (1)
Data measured by pressure probe (21), the survey pressure probe (21) that the detection of the 4th pressure gauge (23) is located at autoclave (1) bottom are measured
Data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822030873.3U CN209457932U (en) | 2018-12-05 | 2018-12-05 | A kind of cave-in device for pressure measurement after simulating the water enchroachment (invasion) that seepage field changes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822030873.3U CN209457932U (en) | 2018-12-05 | 2018-12-05 | A kind of cave-in device for pressure measurement after simulating the water enchroachment (invasion) that seepage field changes |
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| CN209457932U true CN209457932U (en) | 2019-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403963A (en) * | 2018-12-05 | 2019-03-01 | 西南石油大学 | A kind of cave-in device for pressure measurement after simulating the water enchroachment (invasion) that seepage field changes |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403963A (en) * | 2018-12-05 | 2019-03-01 | 西南石油大学 | A kind of cave-in device for pressure measurement after simulating the water enchroachment (invasion) that seepage field changes |
| CN109403963B (en) * | 2018-12-05 | 2024-02-06 | 西南石油大学 | Device for measuring collapse pressure of well wall after water invasion by simulating seepage field change |
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