CN106680106A - Simulation experiment device and method for mudstone and drilling liquid interaction under stratum conditions - Google Patents

Simulation experiment device and method for mudstone and drilling liquid interaction under stratum conditions Download PDF

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Publication number
CN106680106A
CN106680106A CN201710010420.1A CN201710010420A CN106680106A CN 106680106 A CN106680106 A CN 106680106A CN 201710010420 A CN201710010420 A CN 201710010420A CN 106680106 A CN106680106 A CN 106680106A
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China
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temperature
pressure
rock core
pressure kettle
drilling fluid
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CN201710010420.1A
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Chinese (zh)
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CN106680106B (en
Inventor
闫传梁
刘钰文
程远方
丁吉平
滕飞
张怀文
李庆超
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中国石油大学(华东)
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/18Performing tests at high or low temperatures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0019Compressive
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0042Pneumatic or hydraulic means
    • G01N2203/0048Hydraulic means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/022Environment of the test
    • G01N2203/0222Temperature
    • G01N2203/0226High temperature; Heating means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/022Environment of the test
    • G01N2203/023Pressure
    • G01N2203/0232High pressure

Abstract

The invention relates to a simulation experiment device and method for mudstone and drilling liquid interaction under stratum conditions. According to the technical scheme, the simulation experiment device comprises a high-temperature and high-pressure kettle, a drilling liquid system, a confining pressure system, a computer system, a heating system, a temperature control box and a sensor system, wherein the computer system is respectively connected with the drilling liquid system, the confining pressure system, the high-temperature and high-pressure kettle and the sensor system; the high-temperature and high-pressure kettle is provided with a confining pressure vent valve and a drilling liquid vent valve; the other end of the confining pressure system is connected with the high-temperature and high-pressure kettle; the other end of the drilling liquid system is connected with the high-temperature and high-pressure kettle; the heating system wraps the outer side of the high-temperature and high-pressure kettle; and the temperature control box is respectively connected with the inside and outside of the high-temperature and high-pressure kettle. The problems of the simulation experiment device for the mudstone and drilling liquid interaction under high-temperature and high-pressure stratum conditions and testing of rock mechanics parameters are solved; and the simulation experiment device is used for obtaining the influence of the drilling liquid on the mechanical properties of mudstone under the high-temperature and high-pressure stratum conditions, providing experiment data for field drilling and guiding exploration of oil gases and geothermal resources.

Description

Mud stone, drilling fluid interaction analogue experiment installation and method under formation condition
Technical field
The present invention relates to a kind of oil field rock mechanics analogue experiment installation and method, mud under more particularly to a kind of formation condition Rock, drilling fluid interaction analogue experiment installation and method.
Background technology
At present, ultra-deep well drilling engineering is all being implemented in the oil field such as Tarim Basin, Xinjiang, and the bottom hole temperature (BHT) of many wells is high, together When some geothermal wells bottom hole temperature (BHT) up to 400 DEG C, and strata pressure is high.During deep drilling, due to geothermal gradient and The presence of barometric gradient, well is deeper, and the temperature and pressure in pit shaft will become higher.HTHP is to mud stone mechanical characteristic Influence can be very big, and under the high temperature conditions, the chemical characteristic of drilling fluid can change, between influence and mud stone and drilling fluid Interaction, make mud stone mechanical property with the mud soak time deterioration rule it is more complicated.
In recent years, although being attempted to mutual with drilling fluid by the method accurate mud stone of acquisition of simulation laboratory test Rock mechanics parameters after effect, but due to formation lithology, stress state, temperature etc. require it is very high, laboratory experiment have one Fixed limitation, error is larger.A kind of drilling fluid and mud that patent of invention such as Application No. CN201610303368.4 is announced The evaluation method of shale formation physical and chemical effect, although the rock core point after the interaction of conventional drilling fluid Yu rock core can be completed Analysis, but process of the test can not simulate hot conditions.Graduate of porous media dynamics of Ma He state universities of Russia of the U.S. carat Persons have invented IDSTDTM experimental provisions, and the device can be used for testing smaller size of cylinder rock sample(2.01cm× 0.72cm)But, the equipment can not in real time reflect the deformation parameter during mud stone and drilling fluid interaction, equally cannot Realize more than 200 DEG C of high temperature.
In fact the interaction between mud stone and drilling fluid is influenceed very big by high temperature and high pressure environment.Mud stone is contacted with drilling fluid The change of mechanics parameter afterwards directly affects well and bores the stability for opening the rear borehole wall.Using the drilling fluid pair measured under non-formation temperature Mud stone deformation, the influence of damage parameter may produce larger error carrying out wellbore stability analysis and dr illing fluid design.
It is the Changing Pattern of mud stone mechanical property after accurate with obtaining HTHP mfs layer and drilling fluid interaction, it is anxious Need to develop can truly reflect mud stone, the analogue experiment installation of drilling fluid interaction under formation temperature and pressure condition.
The content of the invention
The drawbacks described above that the purpose of the present invention exists aiming at prior art, there is provided mud stone, brill under a kind of formation condition Well liquid interaction analogue experiment installation and method, mud stone under the conditions of simulated formation temperature and pressure that can be more authentic and valid With the interaction of drilling fluid.
Mud stone, drilling fluid interaction analogue experiment installation, its technical scheme under a kind of formation condition that the present invention is mentioned It is:Including high temperature and high pressure kettle(1), borehole fluid system(2), confined pressure system(3), computer system(4), heating system(5), first Atmospheric valve(7), the second atmospheric valve(12), temperature control box(17)And deformation-sensor(23),
The borehole fluid system(2)One end pass through first data transmission line(9)With computer system(4)It is connected, and by calculating Machine system(4)Control;Borehole fluid system(2)The other end pass through the first high pressure line(10)Through heating system(5)With high temperature Autoclave(1)Bottom is connected, for high temperature and high pressure kettle(1)In rock core apply drilling liquid pressure;
Confined pressure system(3)One end pass through the second data line(13)With computer system(4)It is connected, and by computer system (4)Control;Confined pressure system(3)The other end pass through the second high pressure line(14)Through heating system(5)With high temperature and high pressure kettle(1) It is connected, for high temperature and high pressure kettle(1)In rock core apply confined pressure;
First atmospheric valve(7)Installed in the 3rd high pressure line(8)On, and by the 3rd high pressure line(8)Through heating system(5) With high temperature and high pressure kettle(1)It is connected, is used to realize to high temperature and high pressure kettle(1)The emptying of middle confined pressure fluid;
Second atmospheric valve(12)Installed in the 4th high pressure line(11)On, and by the 4th high pressure line(11)Through heating system (5)With high temperature and high pressure kettle(1)It is connected, is used to realize high temperature and high pressure kettle(1)The outflow of middle drilling fluid;
Heating system(5)It is wrapped in high temperature and high pressure kettle(1)Outside, using electromagnetic wave heating principle, to high temperature and high pressure kettle(1)It is interior Fluid and rock core heated;
3rd data line(15)One end and computer system(4)It is connected, the 3rd data line(15)The other end wear Cross heating system(5)With high temperature and high pressure kettle(1)It is connected, for realizing computer system(4)To high temperature and high pressure kettle(1)Interior core axis To the monitoring of deformation.
4th data line(6)One end and computer system(4)It is connected, the 4th data line(6)The other end Through heating system(5)With high temperature and high pressure kettle(1)It is connected, for realizing computer system(4)To high temperature and high pressure kettle(1)Interior rock core The monitoring of radial deformation.
5th data line(16)One end and temperature control box(17)It is connected, the 5th data line(16)The other end on Equipped with temperature sensor, through heating system(5)With high temperature and high pressure kettle(1)Inner side is connected, for temperature control box(17)It is high to high temperature Pressure kettle(1)The monitoring of interior core temperature.
6th data line(18)One end and temperature control box(17)It is connected, the 6th data line(18)The other end on Equipped with temperature sensor, through heating system(5)With high temperature and high pressure kettle(1)Outside is connected, for temperature control box(17)It is high to high temperature Pressure kettle(1)The monitoring of temperature outside.
7th data line(19)One end and temperature control box(17)It is connected, the other end and computer system(4)It is connected, Automatic record and control for realizing autoclave temp.
Preferably, above-mentioned high temperature and high pressure kettle(1)Including rock core(20), push-down head(21), seaming chuck(22), sensing system (23), rock core(20)It is sandwiched in seaming chuck(22)And push-down head(21)Between, rock core(20)By copper sheathing(25), the first small graphite Ring(26), the second small graphite annulus(28)And steel pipe(29)Sealed, high temperature and high pressure kettle(1)Using flexible big graphite annulus(24) Sealed, deformation-sensor(23)Positioned at rock core outside, for realizing the monitoring to rock core deformation.
Preferably, above-mentioned push-down head(21)Centre be provided with circular channel, be used to be delivered to drilling fluid in rock core, realize The flowing of fluid;Push-down head(21)Upper end section upper band it is fluted, be easy to drilling fluid in the flowing of core entry end face.
Preferably, above-mentioned seaming chuck(22)Centre be provided with circular channel, and from seaming chuck(22)Side wall draw, formed L-shaped channel design, is used to from seaming chuck outer wall be delivered to drilling fluid in rock core, realizes the flowing of fluid;Seaming chuck(22)'s Lower end surface section upper band is fluted, is easy to drilling fluid in the flowing of rock core exit end face.
Preferably, above-mentioned steel pipe(29)By thick-walled rigid material is made, tube wall surrounding is provided with some apertures, it is ensured that confined pressure can To act on copper sheathing(25)On, transmission confined pressure is to rock core(20), while making deformation-sensor(23)Steel can be passed through by aperture Pipe(29)With copper sheathing(25)It is connected, realizes the monitoring of rock core deformation.
Preferably, above-mentioned copper sheathing(25)Wall thickness be less than 0.2mm, formed by red copper bar turnery processing, and by Vacuum Heat Treatment, with extremely strong pliability, stronger deformation behaviour can also be kept while effectively isolation confined pressure.
Preferably, above-mentioned seaming chuck(22)Top and push-down head(21)Bottom fill the first small graphite annulus respectively(26)、 Second small graphite annulus(28), and the first small graphite annulus(26)Top install upper pressing cap(27), the second small graphite annulus(28)Under Portion is installed by lower pressing cap(30).
Preferably, above-mentioned high temperature and high pressure kettle(1)In confined pressure fluid use high temperature resistant silicone oil.
Mud stone, the application method of drilling fluid interaction analogue experiment installation under a kind of formation condition that the present invention is mentioned, Including following experimental procedure:
(1)Prepare rock core(20), and rock core both ends of the surface are parallel;
(2)Will rock core be tested(20)Mounted in copper sheathing(25)In, then by rock core(20)And copper sheathing(25)It is put into steel pipe(29)It is interior, Seaming chuck(22)Top and push-down head(21)Bottom install the first small graphite annulus respectively(26), the second small graphite annulus(28), Upper pressing cap is installed afterwards(27)And lower pressing cap(30);
(3)Using upper pressing cap(27), lower pressing cap(30)Will be with the first small graphite annulus(26), the second small graphite annulus(28)Upper pressure Head(22), push-down head(21)Press-in copper sheathing(25)It is interior, make rock core(20)In copper sheathing(25)And steel pipe(29)Middle position, will be upper Pressure cap(27)And lower pressing cap(30)Simultaneously to the first small graphite annulus(26), the second small graphite annulus(28)Extruding, makes the first small graphite Ring(26), the second small graphite annulus(28)Deformation, small graphite annulus after deformation is by copper sheathing(25)Close pressure holding is in steel pipe(29)On, Ensure rock core(20)Sealing is tight;
(4)Rock core outside is installed into deformation-sensor system(23)Afterwards, it is placed in high temperature and high pressure kettle(1)It is interior;
(5)Open confined pressure system(3), make high temperature and high pressure kettle(1)In be full of high temperature resistant silicone oil;
(6)By the second atmospheric valve(12)Open, be connected with vavuum pump, vacuumize;
(7)Using computer system(4)Control confined pressure system(3)To high temperature and high pressure kettle(1)Interior applying confined pressure, sets when confined pressure reaches During definite value, keep confined pressure constant using servo-control system;Computer system is used again(4)Control borehole fluid system(2)To high temperature Autoclave(1)Interior rock core(20)Apply drilling liquid pressure, when drilling liquid pressure reaches setting value, and utilize servo-control system Maintain drilling liquid pressure constant;
(8)Open temperature control box(17), and target temperature is set, to high temperature and high pressure kettle(1)Interior fluid is heated, until temperature reaches Keep each pressure constant to setting value, in heating process;Ensure that temperature, each pressure are protected in whole experiment process after the completion of heating Hold constant;
(9)Using computer system(4)The change axially and radially deformed with rock core and drilling fluid time of contact of record rock core Rule;
(10)After the interaction time of rock core and drilling fluid reaches setting value, increase the axial stress of rock core, until rock core (20)Destroy, measure the mechanics parameter of rock core after being reacted with drilling fluid, so as to draw immersion drilling fluid for rock core Mechanics parameter influence;
(11)High temperature and high pressure kettle temperature is reduced, less than 100 DEG C are cooled to, then starts to unload drilling liquid pressure, confined pressure, release simultaneously After open the first atmospheric valve(7), the second atmospheric valve(12), dismantle high temperature and high pressure kettle(1), take out deformation-sensor(23)And experiment Rock core(20), experiment completion.
Preferably, in step 1, the standard of rock core is diameter 25mm, height 50mm;In addition, in step 6, the second emptying Valve(12)Open, be connected with vavuum pump, vacuumize 4h.
The present invention is relative to prior art, and its advantage is as follows:
(1), the present invention solve the problems, such as mud stone under the high-temperature and high-pressure conditions with drilling fluid interaction after mechanical property testing, Mud stone can more really be reduced in stratum Temperature-pressure Conditions by the affecting laws of mud soak, more directiveness is applied to scene, Avoid the generation of drilling complexity accident;
(2), present invention main equipment used is transformed on the basis of original rock three-axis force experimental facilities, both greatly Cost is saved greatly, requirement of experiment can have been met again;
(3), high temperature and high pressure kettle outside is heated using electromagnetic heating system, both ensure that the safety of heating process, can be made again Temperature reaches the requirement of stratum actual temperature in oil and geothermal drilling(500 DEG C of highest);
(4) sealing between rock core and confined pressure fluid, is carried out using the copper sheathing through vacuum heat, while effectively transmission confined pressure Can also be deformed with rock core.
Brief description of the drawings
Fig. 1 is structural representation of the invention;
Fig. 2 is high temperature and high pressure kettle internal structure schematic diagram;
Fig. 3 is rock core sealed structural representation;
Fig. 4 is push-down head schematic diagram in high temperature and high pressure kettle;
Fig. 5 is the top view of push-down head in high temperature and high pressure kettle;
Fig. 6 is seaming chuck schematic diagram in high temperature and high pressure kettle;
Fig. 7 is the upward view of seaming chuck in high temperature and high pressure kettle;
In figure, 1, high temperature and high pressure kettle, 2, borehole fluid system, 3, confined pressure system, 4, computer system, 5, heating system, the 6, the 4th Data line, the 7, first atmospheric valve, the 8, the 3rd high pressure line, 9, first data transmission line, the 10, first high pressure line, 11, Four high pressure lines, the 12, second atmospheric valve, the 13, second data line, the 14, second high pressure line, the 15, the 3rd data line, 16th, the 5th data line, 17, temperature control box, the 18, the 6th data line, the 19, the 7th data line, 20, rock core, 21, under Pressure head, 22, seaming chuck, 23, deformation-sensor, 24, big graphite annulus, 25, copper sheathing, the 26, first small graphite annulus, 27, upper pressing cap, 28th, the second small graphite annulus, 29, steel pipe, 30, lower pressing cap.
Specific embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
As shown in figure 1, mud stone, the experimental provision of drilling fluid interaction under the measurement HTHP mentioned of the present invention, main Including:High temperature and high pressure kettle 1, borehole fluid system 2, confined pressure system 3, computer system 4, heating system 5, the first atmospheric valve 7, the Two atmospheric valves 12, temperature control box 17.
One end of the borehole fluid system 2 is connected by first data transmission line 9 with computer system 4, and by computer System 4 is controlled;The other end of borehole fluid system 2 is by the first high pressure line 10 through heating system 5 and the bottom of high temperature and high pressure kettle 1 It is connected, for applying drilling liquid pressure to the rock core in high temperature and high pressure kettle 1;
One end of confined pressure system 3 is connected by the second data line 13 with computer system 4, and is controlled by computer system 4; The other end of confined pressure system 3 is connected through heating system 5 by the second high pressure line 14 with high temperature and high pressure kettle 1, for high temperature Rock core in autoclave 1 applies confined pressure.
First atmospheric valve 7 is arranged on the 3rd high pressure line 8, and by the 3rd high pressure line 8 through heating system 5 and height Warm autoclave 1 is connected, and is used to realize the emptying to confined pressure fluid in high temperature and high pressure kettle 1.
Second atmospheric valve 12 is arranged on the 4th high pressure line 11, and passes through heating system 5 by the 4th high pressure line 11 It is connected with high temperature and high pressure kettle 1, is used to realize the outflow of drilling fluid in high temperature and high pressure kettle 1.
Heating system 5 is wrapped in the outside of high temperature and high pressure kettle 1, using electromagnetic wave heating principle, in high temperature and high pressure kettle 1 Fluid and rock core are heated;
One end of 3rd data line 15 is connected with computer system 4, and the other end of the 3rd data line 15 passes through heating System 5 is connected with high temperature and high pressure kettle 1, for realizing monitoring of the computer system 4 to rock core axial deformation in high temperature and high pressure kettle 1.
One end of 4th data line 6 is connected with computer system 4, and the other end of the 4th data line 6 is passed through and added Warm system 5 is connected with high temperature and high pressure kettle 1, for realizing prison of the computer system 4 to rock core radial deformation in high temperature and high pressure kettle 1 Survey.
One end of 5th data line 16 is connected with temperature control box 17, equipped with temperature on the other end of the 5th data line 16 Degree sensor, is connected, for temperature control box 17 to the core temperature of high temperature and high pressure kettle 1 through heating system 5 with the inner side of high temperature and high pressure kettle 1 Monitoring.
One end of 6th data line 18 is connected with temperature control box 17, equipped with temperature on the other end of the 6th data line 18 Degree sensor, is connected, for temperature control box 17 to the temperature outside of high temperature and high pressure kettle 1 through heating system 5 with the outside of high temperature and high pressure kettle 1 Monitoring.
One end of 7th data line 19 is connected with temperature control box 17, and the other end is connected with computer system 4, for reality The automatic record of existing autoclave temp and control.
As shown in Fig. 2 high temperature and high pressure kettle 1, including rock core 20, push-down head 21, seaming chuck 22, sensing system 23.Rock core 20 are sandwiched between seaming chuck 22 and push-down head 21, and high temperature and high pressure kettle 1 is sealed using flexible big graphite annulus 24, graphite annulus The sealing that may insure in the case of HTHP of high temperature high voltage resistant characteristic, deformation-sensor 23 is located at rock core outside, is used for Realize the monitoring to rock core deformation.
As shown in figure 3, passing through copper sheathing 25, the first small graphite annulus 26, the second small graphite annulus 28 and steel between rock core and confined pressure Pipe 29 is sealed.In the copper sheathing 25, copper sheathing 25 is placed in steel pipe 29 rock core to be tested 20, the top of seaming chuck 22 and pushes First 21 bottom is respectively provided with the first small graphite annulus 26, the second small graphite annulus 28, afterwards equipped with upper pressing cap 27 and lower pressing cap 30.Profit To be pressed into the first small graphite annulus 26, the seaming chuck 22 of the second small graphite annulus 28, push-down head 21 with upper pressing cap 27, lower pressing cap 30 In copper sheathing 25.Rock core 20 is ensured in copper sheathing 25 and the middle position of steel pipe 29, by upper pressing cap 27 and lower pressing cap 30 simultaneously to first Small graphite annulus 26, the second small graphite annulus 28 are extruded, and deform the first small graphite annulus 26, the second small graphite annulus 28, the first small graphite Ring 26, the second small graphite annulus 28 are by the close pressure holding of copper sheathing 25 on steel pipe 29, it is ensured that the sealing between rock core 20 and confined pressure.
The surrounding of steel pipe 29 is provided with some apertures, it is ensured that confined pressure can be acted on copper sheathing 25, transmission confined pressure to rock core 20, together When deformation-sensor 23 is connected with copper sheathing through steel pipe 29 by aperture, realize rock core deformation monitoring.
The wall thickness of copper sheathing 25 is 0.2mm, is formed by red copper bar turnery processing, and added vacuum heat, with extremely strong soft Toughness, stronger deformation behaviour can also be kept while effectively isolation confined pressure.
As illustrated in figures 4-5, the centre of push-down head 21 is provided with circular channel, is used to be delivered to drilling fluid in rock core, realizes The flowing of fluid;The upper end section upper band of push-down head 21 is fluted, is easy to drilling fluid in the flowing of core entry end face.
As shown in fig. 6-7, circular channel is provided with seaming chuck 22, is used to realize that drilling fluid flows out from rock core end face;Upper pressure First 22 lower end surface section upper band is fluted, is easy to drilling fluid in the flowing of rock core exit end face.
Mud stone, the application method of drilling fluid interaction analogue experiment installation under a kind of formation condition of the present invention, Using above-mentioned experimental provision, specific experiment step is as follows:
(1)Prepare rock core 20.Rock core standard is diameter 25mm, height 50mm, need to ensure that rock core both ends of the surface are complete to reduce error It is parallel;
(2)Rock core to be tested 20 is mounted in copper sheathing 25, then rock core 20 and copper sheathing 25 are put into steel pipe 29, seaming chuck 22 The bottom of top and push-down head 21 installs the first small graphite annulus 26, the second small graphite annulus 28, upper pressing cap 27 is installed afterwards and is pushed Cap 30;
(3)Using upper pressing cap 27, lower pressing cap 30 will with the first small graphite annulus 26, the seaming chuck 22 of the second small graphite annulus 28, under In the press-in copper sheathing 25 of pressure head 21, it is ensured that rock core 20 is in copper sheathing 25 and the middle position of steel pipe 29.Firmly by upper pressing cap 27 and push Cap 30 is extruded to the first small graphite annulus 26, the second small graphite annulus 28 simultaneously, becomes the first small graphite annulus 26, the second small graphite annulus 28 Shape, the small graphite annulus after deformation is by the close pressure holding of copper sheathing 25 on steel pipe 29, it is ensured that the sealing of rock core 20;
(4)It is placed in high temperature and high pressure kettle 1 after rock core outside is installed into deformation-sensor system 23;
(5)Confined pressure system 3 is opened, makes to be full of high temperature resistant silicone oil in high temperature and high pressure kettle 1;
(6)Second atmospheric valve 12 is opened, is connected with vavuum pump, vacuumize 4h;
(7)Using the control confined pressure of computer system 4 system 3 to confined pressure is applied in high temperature and high pressure kettle 1, when confined pressure reaches setting value (the flatly stress intensity according to stratum determines that this experiment is 40MPa), keep confined pressure constant using servo-control system; Control borehole fluid system 2 to apply drilling liquid pressure to rock core 20 in high temperature and high pressure kettle 1 with computer system 4 again, work as drilling hydraulic (drilling liquid pressure size during according to actual well drilled determines that this experiment is 35MPa when power reaches setting value), and utilize servo Control system maintains drilling liquid pressure constant;
(8)Temperature control box 17 is opened, and the actual temperature on stratum according to where rock core sets target temperature(Such as this rock core institute to be measured The temperature for locating stratum is 200 DEG C), fluid in high temperature and high pressure kettle 1 is heated, until temperature reaches 200 DEG C, in heating process Keep each pressure constant;Ensure that temperature, each pressure keep constant in whole experiment process after the completion of heating;
(9)Advised with the change of rock core and drilling fluid time of contact using axially and radially deforming for the record rock core of computer system 4 Rule, calculates rock core by the axial expansion strain of the generation that absorbed water after mud soak and is radially expanded strain according to record result;
(10)After the interaction time of rock core 20 and drilling fluid reaches setting value(Can be set according to the actual well drilled time, The Mechanics Performance Testing after multiple reaction time is carried out using one group of rock core), increase the axial stress of rock core 20, until rock core 20 destroy, and measure the mechanics parameter and deformation parameter of rock core after being reacted with drilling fluid.So as under drawing formation condition Influence of the immersion drilling fluid to the mechanical property of rock core;
(11)High temperature and high pressure kettle temperature is reduced, less than 100 DEG C are cooled to, then starts to unload drilling liquid pressure, confined pressure simultaneously, unloading During keep confined pressure be consistently greater than drilling liquid pressure.The first atmospheric valve 7, the second atmospheric valve 12 are opened after release.Dismounting high temperature Autoclave 1, takes out deformation-sensor 23 and experiment rock core 20, and experiment is completed.
The present invention relative to prior art, with following beneficial effect:
(1), the present invention solve the problems, such as mud stone under the high-temperature and high-pressure conditions with drilling fluid interaction after mechanical property testing, Mud stone can more really be reduced in stratum Temperature-pressure Conditions by the affecting laws of mud soak, more directiveness is applied to scene, Avoid the generation of drilling complexity accident;
(2), present invention main equipment used is transformed on the basis of original rock three-axis force experimental facilities, both greatly Cost is saved greatly, requirement of experiment can have been met again;
(3), high temperature and high pressure kettle outside is heated using electromagnetic heating system, both ensure that the safety of heating process, can be made again Temperature reaches the requirement of stratum actual temperature in oil and geothermal drilling(500 DEG C of highest);
(4) sealing between rock core and confined pressure fluid, is carried out using the thin copper sheathing through vacuum heat, in the same of effectively transmission confined pressure When can also be deformed with rock core.
The above, is only part preferred embodiment of the invention, and any those of ordinary skill in the art may profit Equivalent technical scheme is changed or is revised as with the technical scheme of above-mentioned elaboration.Therefore, according to technology of the invention Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.

Claims (10)

1. mud stone, drilling fluid interaction analogue experiment installation under a kind of formation condition, it is characterized in that:Including high temperature and high pressure kettle (1), borehole fluid system(2), confined pressure system(3), computer system(4), heating system(5), the first atmospheric valve(7), second put Empty valve(12), temperature control box(17)And deformation-sensor(23),
The borehole fluid system(2)One end pass through first data transmission line(9)With computer system(4)It is connected, and by calculating Machine system(4)Control;Borehole fluid system(2)The other end pass through the first high pressure line(10)Through heating system(5)With high temperature Autoclave(1)Bottom is connected, for high temperature and high pressure kettle(1)In rock core apply drilling liquid pressure;
Confined pressure system(3)One end pass through the second data line(13)With computer system(4)It is connected, and by computer system (4)Control;Confined pressure system(3)The other end pass through the second high pressure line(14)Through heating system(5)With high temperature and high pressure kettle(1) It is connected, for high temperature and high pressure kettle(1)In rock core apply confined pressure;
First atmospheric valve(7)Installed in the 3rd high pressure line(8)On, and by the 3rd high pressure line(8)Through heating system(5) With high temperature and high pressure kettle(1)It is connected, is used to realize to high temperature and high pressure kettle(1)The emptying of middle confined pressure fluid;
Second atmospheric valve(12)Installed in the 4th high pressure line(11)On, and by the 4th high pressure line(11)Through heating system (5)With high temperature and high pressure kettle(1)It is connected, is used to realize high temperature and high pressure kettle(1)The outflow of middle drilling fluid;
Heating system(5)It is wrapped in high temperature and high pressure kettle(1)Outside, using electromagnetic wave heating principle, to high temperature and high pressure kettle(1)It is interior Fluid and rock core heated;
3rd data line(15)One end and computer system(4)It is connected, the 3rd data line(15)The other end wear Cross heating system(5)With high temperature and high pressure kettle(1)It is connected, for realizing computer system(4)To high temperature and high pressure kettle(1)Interior core axis To the monitoring of deformation;
4th data line(6)One end and computer system(4)It is connected, the 4th data line(6)The other end pass through Heating system(5)With high temperature and high pressure kettle(1)It is connected, for realizing computer system(4)To high temperature and high pressure kettle(1)Interior rock core is radially The monitoring of deformation;
5th data line(16)One end and temperature control box(17)It is connected, the 5th data line(16)The other end on be equipped with Temperature sensor, through heating system(5)With high temperature and high pressure kettle(1)Inner side is connected, for temperature control box(17)To high temperature and high pressure kettle (1)The monitoring of interior core temperature;
6th data line(18)One end and temperature control box(17)It is connected, the 6th data line(18)The other end on be equipped with Temperature sensor, through heating system(5)With high temperature and high pressure kettle(1)Outside is connected, for temperature control box(17)To high temperature and high pressure kettle (1)The monitoring of temperature outside;
7th data line(19)One end and temperature control box(17)It is connected, the other end and computer system(4)It is connected, is used for Realize automatic record and the control of autoclave temp.
2. mud stone, drilling fluid interaction analogue experiment installation under formation condition according to claim 1, it is characterized in that: The high temperature and high pressure kettle(1)Including rock core(20), push-down head(21), seaming chuck(22), sensing system(23), rock core(20)Quilt It is clipped in seaming chuck(22)And push-down head(21)Between, rock core(20)By copper sheathing(25), the first small graphite annulus(26), the second gravelstone Mo Huan(28)And steel pipe(29)Sealed, high temperature and high pressure kettle(1)Using flexible big graphite annulus(24)Sealed, deformation is passed Sensor(23)Positioned at rock core outside, for realizing the monitoring to rock core deformation.
3. mud stone, drilling fluid interaction analogue experiment installation under formation condition according to claim 2, it is characterized in that: The push-down head(21)Centre be provided with circular channel, be used to be delivered to drilling fluid in rock core, realize the flowing of fluid;Push Head(21)Upper end section upper band it is fluted, be easy to drilling fluid in the flowing of core entry end face.
4. mud stone, drilling fluid interaction analogue experiment installation under formation condition according to claim 2, it is characterized in that: The seaming chuck(22)Centre be provided with circular channel, and from seaming chuck(22)Side wall draw, form L-shaped channel design, use It is delivered in rock core from seaming chuck outer wall with by drilling fluid, realizes the flowing of fluid;Seaming chuck(22)Lower end surface section on With fluted, it is easy to drilling fluid in the flowing of rock core exit end face.
5. mud stone, drilling fluid interaction analogue experiment installation under formation condition according to claim 2, it is characterized in that: The steel pipe(29)By thick-walled rigid material is made, tube wall surrounding is provided with some apertures, it is ensured that confined pressure can act on copper sheathing (25)On, transmission confined pressure is to rock core(20), while making deformation-sensor(23)Steel pipe can be passed through by aperture(29)With copper sheathing (25)It is connected, realizes the monitoring of rock core deformation.
6. mud stone, drilling fluid interaction analogue experiment installation under formation condition according to claim 2, it is characterized in that: The copper sheathing(25)Wall thickness be less than 0.2mm, formed by red copper bar turnery processing.
7. mud stone, drilling fluid interaction analogue experiment installation under formation condition according to claim 2, it is characterized in that: The seaming chuck(22)Top and push-down head(21)Bottom fill the first small graphite annulus respectively(26), the second small graphite annulus (28), and the first small graphite annulus(26)Top install upper pressing cap(27), the second small graphite annulus(28)Bottom install
Lower pressing cap(30).
8. mud stone, drilling fluid interaction analogue experiment installation under formation condition according to claim 1, it is characterized in that: The high temperature and high pressure kettle(1)In confined pressure fluid use high temperature resistant silicone oil.
9. mud stone, drilling fluid interaction simulated experiment are filled under a kind of formation condition as any one of claim 1-8 The application method put, it is characterized in that including following experimental procedure:
(1)Prepare rock core(20), and rock core both ends of the surface are parallel;
(2)Will rock core be tested(20)Mounted in copper sheathing(25)In, then by rock core(20)And copper sheathing(25)It is put into steel pipe(29)It is interior, Seaming chuck(22)Top and push-down head(21)Bottom install the first small graphite annulus respectively(26), the second small graphite annulus(28), Upper pressing cap is installed afterwards(27)And lower pressing cap(30);
(3)Using upper pressing cap(27), lower pressing cap(30)Will be with the first small graphite annulus(26), the second small graphite annulus(28)Upper pressure Head(22), push-down head(21)Press-in copper sheathing(25)It is interior, make rock core(20)In copper sheathing(25)And steel pipe(29)Middle position, will be upper Pressure cap(27)And lower pressing cap(30)Simultaneously to the first small graphite annulus(26), the second small graphite annulus(28)Extruding, makes the first small graphite Ring(26), the second small graphite annulus(28)Deformation, small graphite annulus after deformation is by copper sheathing(25)Close pressure holding is in steel pipe(29)On;
(4)Rock core outside is installed into deformation-sensor system(23)Afterwards, it is placed in high temperature and high pressure kettle(1)It is interior;
(5)Open confined pressure system(3), make high temperature and high pressure kettle(1)In be full of high temperature resistant silicone oil;
(6)By the second atmospheric valve(12)Open, be connected with vavuum pump, vacuumize;
(7)Using computer system(4)Control confined pressure system(3)To high temperature and high pressure kettle(1)Interior applying confined pressure, sets when confined pressure reaches During definite value, keep confined pressure constant using servo-control system;Computer system is used again(4)Control borehole fluid system(2)To high temperature Autoclave(1)Interior rock core(20)Apply drilling liquid pressure, when drilling liquid pressure reaches setting value, and utilize servo-control system Maintain drilling liquid pressure constant;
(8)Open temperature control box(17), and target temperature is set, to high temperature and high pressure kettle(1)Interior fluid is heated, until temperature reaches Keep each pressure constant to setting value, in heating process;Ensure that temperature, each pressure are protected in whole experiment process after the completion of heating Hold constant;
(9)Using computer system(4)The change axially and radially deformed with rock core and drilling fluid time of contact of record rock core Rule;
(10)After the interaction time of rock core and drilling fluid reaches setting value, increase the axial stress of rock core, until rock core (20)Destroy, measure the mechanics parameter of rock core after being reacted with drilling fluid, so as to draw immersion drilling fluid for rock core Mechanics parameter influence;
(11)High temperature and high pressure kettle temperature is reduced, less than 100 DEG C are cooled to, then starts to unload drilling liquid pressure, confined pressure, release simultaneously After open the first atmospheric valve(7), the second atmospheric valve(12), dismantle high temperature and high pressure kettle(1), take out deformation-sensor(23)And experiment Rock core(20), experiment completion.
10. mud stone, the user of drilling fluid interaction analogue experiment installation under formation condition according to claim 9 Method, it is characterized in that:In step 1, the standard of rock core is diameter 25mm, height 50mm;In addition, in step 6, the second atmospheric valve (12)Open, be connected with vavuum pump, vacuumize 4h.
CN201710010420.1A 2017-01-06 2017-01-06 Mud stone, drilling fluid interaction imitative experimental appliance and method under formation condition CN106680106B (en)

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