CN103048261B - Device and method for researching rock physical property parameter change under action of acid fluid - Google Patents
Device and method for researching rock physical property parameter change under action of acid fluid Download PDFInfo
- Publication number
- CN103048261B CN103048261B CN201310021884.4A CN201310021884A CN103048261B CN 103048261 B CN103048261 B CN 103048261B CN 201310021884 A CN201310021884 A CN 201310021884A CN 103048261 B CN103048261 B CN 103048261B
- Authority
- CN
- China
- Prior art keywords
- volume pump
- pressure
- ball valve
- reactor
- acidic fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a device and a method for researching rock physical property parameter change under the action of an acid fluid. The method comprises the steps of wrapping a cylindrical test sample and a porous gasket by using a sealing material; putting into a reaction kettle; vacuumizing a system; saturating water to the system after being vacuumized; preparing the acid fluid according to demands and sampling and analyzing; keeping a system pipeline at constant temperature; exerting confining pressure and backpressure to the reaction kettle; exerting porous pressure; and measuring permeation coefficients and displacement pressure of the material in real time. The device is excellent in antiseptic property; due to a liquid preparation relay device, the difficulty of preparing a large-capacity acid fluid under high pressure condition is solved, and the contact area of the acid fluid with the device is reduced as much as possible; and a sealing structure of a rock core end part is in a mode that a bandage is adopted to be tightly tied and sealed with a side surface sealing material at a sharp ring of an end part gasket, so that the device is simple and economic, and at the same time, anti-corrosion and sealing are realized.
Description
Technical field
The present invention relates to rock type porous media material and the interactional research field of outside fluid, more specifically relate to a kind of device studying petrophysical parameter change under acidic fluid effect, also relate to a kind of method studying petrophysical parameter change under acidic fluid effect, be applicable to the interaction of rock type porous media material and outside fluid, the impact that carbon dioxide and the long chemical reaction of hydrogen sulfide solution as sandstone and injection develop on physical parameters such as sandstone infiltration coefficient, replacement pressures.
Background technology
Adopt (ECBM), shale gas exploitation along with coal-seam gas increases, (EOR) is adopted in crude oil increasing, deep earth heart exploits the development of deep part of Industrial Engineering and the Requirement and developments of safety evaluation project such as (EGS), and in recent years to CO
2the active demand of geological storage (CCS), acid gas re-injection (AGI), nuclear waste storage, underground energy deposit, landfill disposal equal energy source and discarded object geological storage technology with develop rapidly, fluid to inject after deep formation the risk assessment on this stratum as the most important thing of geological storage engineering feasibility study, has attracted the attention of numerous researchist and engineering decision person.And the chemical reaction of rock and fluid is on the impact of petrophysical parameter, especially on the impact that rock seepage characteristic and long-term mechanical characteristic develop, become one of difficult problem of wherein urgently capturing.
Inject fluid and rock interaction can accelerate rock forming mineral dissolving, move and precipitate and rock interior micro-crack breed expansion, thus change the percolation path of rock in whole storage convering system, integrality and mechanical characteristic for a long time thereof.The interaction of outside fluid and rock is on the impact of reservoir sandstone, specifically, the change of seepage characteristic may worsen because rock permeability coefficient near Injection Well reduces the stratum property noted caused, and affects greatly on injecting fluid flowing in the earth formation especially with migration; The evolution of rock replacement pressure may cause reservoir and cap interface place replacement pressure are less than reservoir pressure gradually and inject fluid (as supercritical CO
2) buoyancy, can not stop fluid infiltrate, penetrate cap rock, reservoir loses residual gas isolating power gradually; Long-term chemical reaction affects the mechanical characteristic of rock, and reservoir pressure also raises because of the continuous injection of fluid, may cause a part of rock failure damage or stratum globality unstability, even Tectonic earthquake.
Rock with inject the interaction of fluid, its chemical reaction occurred changes the micro hole structure of rock, thus on the impact that the seepage characteristic of rock, replacement pressure and mechanical characteristic develop, is one of key scientific problems evaluating its underground sequestration engineering success or failure.Apparatus and method of the present invention are science and technology support and tachnical storages that following China carries out engineering mimoir urgent need.
Therefore, chemical reaction between this study of rocks and fluid is to the method and apparatus of the physical parameter changes such as rock permeability coefficient, replacement pressure, convection cell injection stratum process flowing migration-chemical reaction-mechanical response coupling scientific research strong experiment can be provided to support, carbon dioxide (CO can be widely used in
2) the geological storage field such as geological storage, acid gas re-injection, sour water re-injection, rock gas subsurface reservoir.
Summary of the invention
The object of the invention is the needs be for the defect existed in prior art and scientific research and engineering, a kind of device studying petrophysical parameter change under acidic fluid effect is provided, specifically can measure the acidic fluid that formed by hydrogen sulfide gas, carbon dioxide and distilled water proportioning and sandstone circulates for a long time and after chemical reaction, the change of sandstone infiltration coefficient, replacement pressure.
Additionally provide a kind of method studying petrophysical parameter change under acidic fluid effect, chemical reaction between external (acidity) fluid and rock type porous media material can be analyzed on the impact of its material property parameter.
The invention provides a kind of Novel dispensing relay, the jumbo acidic fluid of disposable preparation on condition of high voltage can be realized, and decrease the contact area of acidic fluid and device substantially.
Present invention also offers a kind of novel core end seal structure, by the ingenious structure at the arc tip in the middle of the cushion block of end, briefly realize sealing and anticorrosion economically simultaneously.
Study a device for petrophysical parameter change under acidic fluid effect, comprise reactor, also comprise vacuum pump, vacuum meter, water tank, liquor room, sulfuretted hydrogen gas cylinder and dioxide bottle,
Vacuum pump and vacuum meter are communicated with the first four-way respectively, first four-way is communicated with the second four-way by the first ball valve, second four-way is communicated with water tank by the 3rd ball valve, second four-way is communicated with the 3rd four-way by the 4th ball valve, second four-way is connected with liquor room head end by the first volume pump, 3rd four-way is connected with the 3rd volume pump by the 5th ball valve, 3rd volume pump is connected with sulfuretted hydrogen gas cylinder and dioxide bottle respectively, 3rd four-way is connected with the first tail washings handling member, 3rd four-way is connected with the second tail washings handling member by the 8th ball valve, 3rd four-way is connected with liquor room tail end and passes through the 12 ball valve and is connected with reactor head end, reactor tail end is connected with the second tail washings handling member and the 4th volume pump respectively by the 14 ball valve,
Also comprise the first pressure transducer for measuring the first volume pump pressure, for measuring the second pressure transducer of the second volume pump pressure, for measuring the 3rd pressure transducer of reactor head end pressure, for measuring the 4th pressure transducer of reactor tail end pressure, for measuring the differential pressure gauge of reactor head end and tail end pressure differential
Also comprise the data collector be connected with the first volume pump, the second volume pump, the 3rd volume pump, the 4th volume pump, the first pressure transducer, the second pressure transducer, the 3rd pressure transducer, the 4th pressure transducer and differential pressure gauge respectively.
The head end of reactor as above is connected with the tail end of reactor with the second filtrator by the first filtrator, the tenth ball valve, differential pressure gauge, the 11 ball valve successively.
First tail washings handling member as above comprises the first tail washings process mouth be communicated with the 3rd four-way by the first needle-valve, and the first tail washings handling member also comprises the second needle-valve be connected with the 3rd four-way by the 16 ball valve,
The second described tail washings handling member comprises the second tail washings process mouth be communicated with the 14 ball valve by the 3rd needle-valve, and the second tail washings handling member also comprises the 4th needle-valve be connected with the 14 ball valve by the 19 ball valve.
First volume pump as above is imported and exported, the second volume pump is imported and exported, the 3rd volume pump is imported and exported and the import and export of the 4th volume pump are provided with ball valve.
Liquor room as above comprises liquor room urceolus and is arranged on the dosing relay in the urceolus of liquor room, dosing relay comprises the movable plate, air bag and the fixed head that are successively set on from top to bottom in the urceolus of liquor room, wherein fixed head is fixedly connected with liquor room urceolus, movable plate is connected with the top of air bag, and movable plate can under the effect of the pressure along liquor room urceolus extruding gasbag.
Reactor as above comprises reactor urceolus, also comprise the upper end cushion block be successively set on from top to bottom in reactor urceolus, upper porous gasket, core, lower porous gasket and bottom cushion block, upper end cushion block, upper porous gasket, core, lower porous gasket and bottom cushion block adopt encapsulant to wrap, circumference in the middle part of upper end cushion block and bottom cushion block is provided with arc point ring, arc point ring is wound with elastoplast, wherein, upper end cushion block, bottom cushion block, encapsulant and elastoplast form core end seal structure.
Study a method for petrophysical parameter change under acidic fluid effect, comprise the following steps:
Step 1, measured material is processed into cylindrical core, physical property measurement and rock mineral composition analysis are carried out to core;
Step 2, the first volume pump and the 3rd volume pump piston are pushed into top;
Step 3, startup vacuum pump, carry out airtight test to device, vacuumize device;
Step 4, to water tank topping-up, first to the pipeline of whole device, full water is carried out again to liquor room water of satisfying by the first volume pump, get rid of the gas in pipeline and impurity;
Step 5, open sulfuretted hydrogen gas cylinder and dioxide bottle, hydrogen sulfide gas and carbon dioxide are injected into the liquor room of full water by the 3rd volume pump with constant flow pattern, its amount presses component requirements preparation acidic fluid, is analyzed by the acidic fluid composition of the first tail washings handling member sampling to preparation;
Step 6, fill hydraulic oil in reactor, applied the confined pressure stress preset by the second volume pump, confined pressure stress value is determined according to the actual formation pressure of simulation;
Step 7, device is placed in isoperibol, temperature value is determined according to the formation temperature of realistic simulation;
The acidic fluid in liquor room, by the Pore Pressure force value of setting, is pressed into reactor with constant voltage mode, the core of the saturated distilled water of displacement by step 8, the first volume pump;
Step 9, the 4th volume pump apply constant back pressure stress, maintain reactor tail end, i.e. the force value of core rear end; No longer rise until the registration of the 4th pressure transducer keeps stable, record flow and the force value of the first volume pump, the second volume pump, the 3rd volume pump and the 4th volume pump, record the registration of the first pressure transducer, the second pressure transducer, the 3rd pressure transducer, the 4th pressure transducer and differential pressure gauge;
Step 10, utilize the second tail washings handling member to sample the acidic fluid by core, and contrast with the component of the acidic fluid in step 5, obtain the situation of change of acidic fluid component before and after testing;
Step 11, to circulate wash mill with distilled water in the first tail washings handling member and second tail washings handling member place's emptying acidic fluid, close each ball valve and power supply;
Step 12, physical property measurement analysis and rock mineral composition analysis are carried out to the core after experiment, and to contrast with the petrophysical parameter in step 1 and mineralogical composition, the change of rock mineral composition and acidic fluid component before and after analysis design mothod.
The present invention compared with prior art, has the following advantages and effect:
1) the inventive method is by the change of acidic fluid and rock interaction mineral constituent before and after test, attempts determining that main mineral chemistry is reacted, and analyzes the impact that this chemical reaction changes the physical parameter such as infiltration coefficient, replacement pressure of rock.Provide a kind of real-time analysis method of attainable many field intensity coupling (particularly seepage flow-chemistry-Coupling with Mechanics), principle is distinct.
2) apparatus of the present invention antiseptic property is remarkable.Material is said, the Hastelloy material (C276) that the part that device directly contacts acidic fluid all adopts ability hydrogen sulfide solution to corrode, as the elements such as pipe valve and the parts such as liquor room and reactor.The problem of this device resistance to hydrogen sulfide solution corrosion under solving condition of high voltage well, reaches the international leading level;
3) apparatus of the present invention structural design has originality and novelty, as a kind of Novel dispensing relay that inside, liquor room provides, the preparation of the acidic fluid needing long-time continuous to inject under ensure that condition of high voltage, and the contact area decreasing acidic fluid and device substantially; As the novel core end seal structure of one that reactor inside provides, briefly solve the anticorrosion of core end and sealing problem economically simultaneously.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention;
Fig. 2 is the structural representation in liquor room of the present invention;
Fig. 3 is the structural representation of reactor of the present invention.
In figure: 1-water tank; 2-liquor room; 2a-movable plate (Hastelloy material); 2b-air bag; 2c-fixed head (Hastelloy sheet material), 2d-liquor room urceolus (stainless steel); 3-sulfuretted hydrogen gas cylinder; 4-dioxide bottle; 5-reactor; 5a-1-upper end cushion block, 5a-2-bottom cushion block (adopt Hastelloy material, middle outstanding certain radian is used for end part seal); 5b-core; The upper porous gasket of 5c-1-, porous gasket (dispersing fluid forms equal uniform flow) under 5c-2-; 5d-encapsulant (available heat-shrinkable tube, heat is shunk, acid resistance flow-induced corrosion); 5e-elastoplast (be placed in the hydraulic oil in reactor, from outside tighten heat-shrinkable tube and cushion block prominence, end, enhanced leaktightness effect); 601-first volume pump; 602-second volume pump; 603-the 3rd volume pump; 604-the 4th volume pump; 701-first ball valve; 702-second ball valve; 703-the 3rd ball valve; 704-the 4th ball valve; 705-the 5th ball valve; 706-the 6th ball valve; 707-the 7th ball valve; 708-the 8th ball valve; 709-the 9th ball valve; 710-the tenth ball valve; 711-the 11 ball valve; 712-the 12 ball valve; 713-the 13 ball valve; 714-the 14 ball valve; 715-first needle-valve; 716-the 16 ball valve; 717-second needle-valve; 718-the 3rd needle-valve; 719-the 19 ball valve; 720-the 4th needle-valve; 801-first pressure transducer; 802-second pressure transducer; 803-the 3rd pressure transducer; 804-the 4th pressure transducer; 901-first four-way; 902-second four-way; 903-the 3rd four-way; 10-vacuum pump; 11-vacuum meter; 12-first filtrator; 13-differential pressure gauge; 14-second filtrator; 15-second tail washings process mouth; 16-first tail washings process mouth;
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Embodiment 1:
As shown in Fig. 1 ~ 3, a kind of device studying petrophysical parameter change under acidic fluid effect,
Comprise water tank 1, liquor room 2, sulfuretted hydrogen gas cylinder 3, dioxide bottle 4, reactor 5, volume pump (601-604), valve (701-720), pressure transducer (801-804), four-way (901-903), vacuum pump 10, vacuum meter 11, first filtrator 12, differential pressure gauge 13, second filtrator 14, first tail washings process mouth 15 and the second tail washings process mouth 16.
The region dosing function being core with liquor room 2, type of attachment is that vacuum pump 10 is communicated with the first four-way 901 respectively with vacuum meter 11, first four-way 901 is communicated with the second four-way 902 by the first ball valve 701, and the first four-way 901 is connected with water tank 1 by the second ball valve 702; Second four-way 902 is communicated with the 3rd four-way 903 by the 4th ball valve 704; 3rd four-way 903 accesses the front end of the second tail washings handling member by the 8th ball valve 708, and the structure that said elements is constructed can be revealed for systems axiol-ogy and vacuumize.
Second four-way 902 is communicated with water tank 1 by the 3rd ball valve 703, and the second four-way 902 is connected with the head end in liquor room 2 by the first volume pump 601; 3rd four-way 903 is connected with the tail end in liquor room 2, and is connected with the 3rd volume pump 603 by the 5th ball valve 705; 3rd volume pump 603 is connected with sulfuretted hydrogen gas cylinder 3 and dioxide bottle 4 respectively, 3rd four-way 903 is connected with the first tail washings handling member, and the structure that said elements is constructed can realize preparing acidic fluid in proportion by hydrogen sulfide gas, carbon dioxide and distilled water.
The region being core with reactor 5 loads and monitoring function, type of attachment is that the first volume pump 601 connects liquor room 2, liquor room 2 is connected to the front end of reactor 5 by the 12 ball valve 712, and reactor 5 tail end is connected with the second tail washings handling member and the 4th volume pump 604 respectively by the 14 ball valve 714.This series of elements, particularly around multiple volume pumps of reactor, has constructed the value-added tax function of system.
Also comprise the first pressure transducer 801 for measuring the first volume pump 601 pressure, for measuring the second pressure transducer 802 of the second volume pump 602 pressure, for measuring the 3rd pressure transducer 803 of reactor 5 head end pressure, for measuring the 4th pressure transducer 804 of reactor 5 tail end, for measuring the differential pressure gauge 13 of reactor 5 head end and tail end pressure differential
Also comprise the data collector be connected with the first volume pump 601, second volume pump 602, the 3rd volume pump 603 and the 4th volume pump 604, first pressure transducer 801, second pressure transducer 802, the 3rd pressure transducer 803, the 4th pressure transducer 804 and differential pressure gauge 13 respectively.These pressure transducers and volume pump are connected to computer by data collector, and this series of elements has constructed the monitoring function of system, gather the force value of system in loading procedure and flow value.
Wherein the branch road connected mode at differential pressure gauge 13 place is that the head end of reactor 5 is connected with the tail end of reactor with the second filtrator 14 by the first filtrator 12, the tenth ball valve 710, differential pressure gauge the 13, the 11 ball valve 711 successively.
First tail washings handling member is comprised the first tail washings process mouth 16, the first tail washings handling member be communicated with the 3rd four-way 903 by the first needle-valve 715 and also comprises the second needle-valve 717 be connected with the 3rd four-way 903 by the 16 ball valve 16.
Second tail washings handling member is comprised the second tail washings process mouth 15, the second tail washings handling member be communicated with the 14 ball valve 714 by the 3rd needle-valve 718 and also comprises the 4th needle-valve 720 be connected with the 14 ball valve 714 by the 19 ball valve 719.
Inside, liquor room 2 comprises movable plate 2a, air bag 2b, fixed head 2c and liquor room urceolus 2d.Wherein movable plate 2a, the Embedded air bag 2b in middle part of upper end and the fixed head 2c of bottom form one-piece construction, and air bag 2b internal circulation acidic fluid is distilled water between air bag 2b and liquor room urceolus 2d.
Liquor room 2 is high pressure vessel (withstand voltage be greater than 20MPa), and air bag 2b volume 5L(ensures the amount that the required acidic fluid of once experiment is enough), liquor room urceolus 2d adopts stainless steel processing; Top in the urceolus 2d of liquor room is provided with movable plate 2a, bottom in the urceolus 2d of liquor room is provided with fixed head 2c, air bag 2b is arranged between movable plate 2a and fixed head 2c, can test preparation acidic liquid used in air bag 2b, circulate between air bag 2b and liquor room urceolus 2d distilled water, first volume pump 601 loads and causes the pressure in the urceolus of liquor room to increase, thus cause movable plate 2a extruding gasbag 2b, the pressure of air bag 2b side also can increase simultaneously, further extruding gasbag 2b, makes the acidic liquid in air bag 2b can flow in reactor 5.
Reactor 5 comprises reactor urceolus, also comprises the upper end cushion block 5a-1 be successively set on from top to bottom in reactor urceolus, upper porous gasket 5c-1, core 5b, lower porous gasket 5c-2 and bottom cushion block 5a-2.Upper end cushion block 5a-1, upper porous gasket 5c-1, core 5b, lower porous gasket 5c-2 and bottom cushion block 5a-2 adopt encapsulant 5d to wrap, and adopting elastoplast 5e to tightly wrap in the most advanced and sophisticated place of arc of upper and lower end parts cushion block (5a-1,5a-2), bottom cushion block 5a-2 is fixed in reactor urceolus.
Upper and lower end parts cushion block (5a-1, 5a-2) circumference at middle part is provided with arc point ring, arc point ring can select heat-shrinkable tube as encapsulant 5d() structure that seals of side and reactor urceolus, and adopt elastoplast 5e by upper and lower end parts cushion block (5a-1, arc point ring 5a-2) and encapsulant 5d(heat-shrinkable tube) be wound around and tighten, interior outer fluid is at end cushion block (5a-1, the most advanced and sophisticated place of arc 5a-2) realizes dot encapsulation, namely acidic liquid only flows through porous gasket 5c-1 successively, core 5b, lower porous gasket 5c-2, and the oil pressure that the second volume pump 602 produces between encapsulant and reactor urceolus applies confined pressure to core 5b.
Embodiment 2:
As shown in Figure 1, a kind of method studying petrophysical parameter change under acidic fluid effect, comprises following steps:
Step 1, measured material is processed into cylindrical core 5b, diameter 50 ± 2mm, length 100 ± 2mm, carries out physical property measurement (factor of porosity test, true triaxial experiment, acoustic emission experiment) and rock mineral composition analysis (scanning electron microscope sem, X-ray diffraction XRD) to core 5b before testing, before circulation reaction experiment, (namely before chemical reaction) tests basic physical properties parameter and the mineralogical composition of rock.
Step 2, core 5b two ends contact with lower porous gasket 5c-2 with upper porous gasket 5c-1 respectively, and are connected with device pipeline by upper and lower end parts cushion block (5a-1,5a-2).One-piece construction is made up of upper end cushion block 5a-1, upper porous gasket 5c-1, core 5b, lower porous gasket 5c-2 and bottom cushion block 5a-2, this integrally-built side adopts encapsulant 5d to wrap, bottom is fixed in reactor 5 by bottom cushion block 5a-2, thus core fixing in finishing device.First volume pump 601 and the 3rd volume pump 603 piston are pushed into top;
Step 3, startup vacuum pump 10, carry out airtight test to system.Gauge 11(Germany import Baumer Y91253B59R) registration close-1 time system by leak detection test, then whole system is vacuumized, close vacuum pump 10, first ball valve 701, second ball valve 702, the 4th ball valve 704 and the 8th ball valve 708 when vacuum meter 11 registration is-1, thus complete twin installation vacuumize process;
Step 4, to water tank 1 topping-up, first satisfied water (being namely saturated distilled water to fill, not containing gas) in liquor room 2 by the first volume pump 601, fuller water is carried out to the pipeline of whole device, guarantee in all pipelines of device not containing gas and impurity;
Step 5, open sulfuretted hydrogen gas cylinder 3 and dioxide bottle 4, hydrogen sulfide gas and carbon dioxide are injected into the liquor room 2 of full water by the 3rd volume pump 603 with constant flow pattern, its amount presses component requirements preparation (during experiment, in acid gas, sulfuretted hydrogen accounts for the 1%-50% of total gas volume, and be fully dissolved in distilled water), and analyzed by the acidic fluid composition that the first sampling needle-valve 715 samples preparing, if do not met the demands, preparation is readjusted (as on the low side in component sulfuretted hydrogen after calculating the composition of each component, then quantitative hydrogen sulfide gas is refilled to liquor room).After reaching requirement, record its each component proportion.Complete the preparation of acidic fluid thus;
Step 6, to filling hydraulic oil (the confined pressure Transfer Medium in reactor) in reactor 5, the confined pressure stress preset is applied by the second volume pump 602, confined pressure stress value is determined according to the actual formation pressure of simulation, is less than 50MPa, records confined pressure stress value by the second pressure transducer 802;
Step 7, device are placed in isoperibol, and temperature value is determined according to the formation temperature of realistic simulation, is less than 100 DEG C;
The acidic fluid in liquor room 2, by the Pore Pressure force value (being less than 20MPa) of setting, is pressed into reactor 5 with constant voltage mode, the core of the saturated distilled water of displacement by step 8, the first volume pump 601;
Step 9, the 4th volume pump 604 apply constant back pressure stress (being less than 20MPa), maintain reactor 5 tail end, i.e. the force value of core rear end; No longer rise until the registration of the 4th pressure transducer 804 keeps stable, record flow and the force value of the first volume pump 601, second volume pump 602, the 3rd volume pump 603 and the 4th volume pump 604, record the registration of the first pressure transducer 801, second pressure transducer 802, the 3rd pressure transducer 803, the 4th pressure transducer 804 and differential pressure gauge 13;
Step 10, in course of reaction, utilize the second sampling needle-valve 718 to sample the acidic fluid by core, and contrast with the component of the acidic fluid in step 5, obtain the situation of change of acidic fluid component before and after testing;
Step 11, at the first tail washings process mouth 16 and second tail washings process mouth 15 place's emptying device inner acidic fluid and with distilled water circulation washing, close each ball valve and power supply.
Step 12, again physical property measurement analysis and rock mineral composition analysis are carried out to the core after experiment, and to contrast with the petrophysical parameter in step 1 and mineralogical composition.The main chemical reactions that before and after analysis design mothod, the change and then determine of rock mineral composition and acidic fluid component occurs in experimentation;
The infiltration coefficient recorded by this device and replacement pressure changing value, and the additional physical parameter (factor of porosity, mechanical strength, characteristics of Acoustic Emission) that above-mentioned physical property measurement is analyzed, the change of petrophysical parameter before and after analytical chemistry reaction, thus realize the coupling analysis of seepage flow-chemistry-mechanics.
The concrete steps wherein surveying core replacement pressure are:
After operation above-mentioned steps 1 ~ step 4, device is in water-saturated state, and acidic fluid not yet starts preparation.Valve-off (701,702 and 703) opens valve (705,712), the 3rd volume pump 603 with the pattern of slowly pressurizeing by the CO in dioxide bottle 707
2gas passes into reactor 5, i.e. CO
2the core of the saturated distilled water of gas displacement.And the environment temperature needed is maintained by step 7, step 6 pair core applies confined pressure stress, and step 9 pair core tail end applies back pressure stress.
The force value of Real-time Collection the 3rd volume pump 603 and the differential pressure value of differential pressure gauge 13.When differential pressure gauge 13 registration rapid drawdown, show that carbon dioxide breaks through core, the force value of the now display of the 3rd volume pump 603 is the replacement pressure of core.
The concrete steps wherein surveying core infiltration coefficient are:
After operation above-mentioned steps 1 ~ step 9, the acidic fluid in liquor room 2 is loaded into reactor 5 with the pattern of constant flow by the first volume pump 601, and the 4th volume pump 604 maintains the pressure of core tail end.After stable experiment (being steady flow in pipeline), record the loading speed V of the first volume pump and the pressure difference of differential pressure gauge (13), solved the infiltration coefficient obtaining core by Darcy's law.
Principle of work of the present invention:
1) main chemical reactions of rock and acidic fluid is first determined, by carrying out mineralogical composition analysis (as scanning electron microscope sem, X-ray diffraction XRD etc.) to rock before and after test; Real time sample analysis is carried out to acidic fluid composition, and change before and after contrast, determine main chemical reaction type and reaction rate thereof.
2) the secondly related property Parameters variation of rock in measured test process, carry out real-time testing permeability and replacement pressure test to rock in process of the test, observe the real-time evolution of this physical parameter, concrete principle is as follows:
Replacement pressure is the build-in attribute of rock type porous media material, numerically equal the breakthrough pressure of material, react material behavior and interior microscopic pore texture, be defined as in porous media material the minimum critical pressure infiltrating phase fluid and started needed for breakthrough/displacement mutually by non-infiltration.Continuity method is adopted to measure the replacement pressure of rock type porous medium herein.During test, core upstream volume pump slowly carries out pressure-loaded continuously, observes the sandstone core of saturated distilled water by CO
2or H
2during S gas breakthrough (microbubble flows out, downstream pressure sensor registration become the phenomenon such as large), now the on-load pressure value of upstream volume pump is the replacement pressure value of the saturated distilled water of this material acid gas displacement.
The infiltration coefficient of porous media material adopts two volume pump method to measure.Upstream and downstream volume pump constant pressure differential Δ P(volume pump constant flow pattern is kept to inject, differential pressure gauge actual measurement obtains the pressure differential at core two ends), the propelling speed V of monitoring upstream volume pump piston, conversion fluid volume flow, adopts Darcy's law to calculate the osmotic coefficient k of material.
Darcy's law:
The constant loss of flood peak:
In formula:
Q-unit interval seepage flow, advances speed V to convert by volume pump and tries to achieve, known quantity;
A-discharge section area, cylindrical core diameter 50mm, known quantity;
H-gross head loses, and tried to achieve by conversion formula, pressure differential Δ P is recorded by differential pressure gauge;
L-percolation path length is core length 100mm herein, known quantity;
ρ g-fluid density and acceleration of gravity, known quantity;
K-infiltration coefficient, amount to be asked, is obtained by above-mentioned solving simultaneous equation.
3) carry out additional testing experiment to rock, as carried out pressure mercury experiment gaging hole porosity, the true triaxial test ergometry intensity of band acoustic emission system and Cracks Evolution, in-depth analysis rock and fluid chemistry react the impact on its seepage characteristic, mechanical characteristic.
4) analysis design mothod data, attempt setting up chemical reaction in process of the test and, on the stable relation of petrophysical parameter evolution impact, consider the new constitutive relation of rock material saturation degree under proposing chemical affect.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the protection domain of the application.
Claims (6)
1. study the device of petrophysical parameter change under acidic fluid effect for one kind, comprise reactor (5), it is characterized in that, also comprise vacuum pump (10), vacuum meter (11), water tank (1), liquor room (2), sulfuretted hydrogen gas cylinder (3) and dioxide bottle (4)
Vacuum pump (10) is communicated with the first four-way (901) respectively with vacuum meter (11), first four-way (901) is communicated with the second four-way (902) by the first ball valve (701), second four-way (902) is communicated with water tank (1) by the 3rd ball valve (703), second four-way (902) is communicated with the 3rd four-way (903) by the 4th ball valve (704), second four-way (902) is connected with liquor room (2) head end by the first volume pump (601), 3rd four-way (903) is connected with the 3rd volume pump (603) by the 5th ball valve (705), 3rd volume pump (603) is connected with sulfuretted hydrogen gas cylinder (3) and dioxide bottle (4) respectively, 3rd four-way (903) is connected with the first tail washings handling member, 3rd four-way (903) is connected with the second tail washings handling member by the 8th ball valve (708), 3rd four-way (903) is connected with liquor room (2) tail end and passes through the 12 ball valve (712) and is connected with reactor (5) head end, reactor (5) tail end is connected with the second tail washings handling member and the 4th volume pump (604) respectively by the 14 ball valve (714)
Also comprise the first pressure transducer (801) for measuring the first volume pump (601) pressure, for measuring second pressure transducer (802) of the second volume pump (602) pressure, for measuring the 3rd pressure transducer (803) of reactor (5) head end pressure, for measuring the 4th pressure transducer (804) of reactor (5) tail end pressure, for measuring the differential pressure gauge (13) of reactor (5) head end and tail end pressure differential
Also comprise the data collector be connected with the first volume pump (601), the second volume pump (602), the 3rd volume pump (603), the 4th volume pump (604), the first pressure transducer (801), the second pressure transducer (802), the 3rd pressure transducer (803), the 4th pressure transducer (804) and differential pressure gauge (13) respectively
The first described tail washings handling member comprises the first tail washings process mouth (16) be communicated with the 3rd four-way (903) by the first needle-valve (715), first tail washings handling member also comprises the second needle-valve (717) be connected with the 3rd four-way (903) by the 16 ball valve (716)
The second described tail washings handling member comprises the second tail washings process mouth (15) be communicated with the 14 ball valve (714) by the 3rd needle-valve (718), and the second tail washings handling member also comprises the 4th needle-valve (720) be connected with the 14 ball valve (714) by the 19 ball valve (719).
2. a kind of device studying petrophysical parameter change under acidic fluid effect according to claim 1, is characterized in that:
The head end of described reactor (5) is connected with the tail end of the second filtrator (14) with reactor (5) by the first filtrator (12), the tenth ball valve (710), differential pressure gauge (13), the 11 ball valve (711) successively.
3. a kind of device studying petrophysical parameter change under acidic fluid effect according to claim 1, is characterized in that:
Described the first volume pump (601) is imported and exported, the second volume pump (602) is imported and exported, the 3rd volume pump (603) is imported and exported and the import and export of the 4th volume pump (604) are provided with ball valve.
4. a kind of device studying petrophysical parameter change under acidic fluid effect according to claim 1, is characterized in that:
The dosing relay that described liquor room (2) comprises liquor room urceolus (2d) and is arranged in liquor room urceolus (2d), dosing relay comprises the movable plate (2a) be successively set on from top to bottom in liquor room urceolus (2d), air bag (2b) and fixed head (2c), wherein fixed head (2c) is fixedly connected with liquor room urceolus (2d), movable plate (2a) is connected with the top of air bag (2b), and movable plate (2a) can under the effect of the pressure along liquor room urceolus (2d) extruding gasbag (2b).
5. a kind of device studying petrophysical parameter change under acidic fluid effect according to claim 1, is characterized in that:
Described reactor (5) comprises reactor urceolus, also comprise the upper end cushion block (5a-1) be successively set on from top to bottom in reactor urceolus, upper porous gasket (5c-1), core (5b), lower porous gasket (5c-2) and bottom cushion block (5a-2), upper end cushion block (5a-1), upper porous gasket (5c-1), core (5b), lower porous gasket (5c-2) and bottom cushion block (5a-2) adopt encapsulant (5d) to wrap, the circumference at upper end cushion block (5a-1) and bottom cushion block (5a-2) middle part is provided with arc point ring, arc point ring is wound with elastoplast (5e), wherein, upper end cushion block (5a-1), bottom cushion block (5a-2), encapsulant (5d) and elastoplast (5e) form core end seal structure.
6. utilize device described in claim 1 to carry out studying a method for petrophysical parameter change under acidic fluid effect, it is characterized in that, comprise the following steps:
Step 1, measured material is processed into cylindrical core (5b), physical property measurement and rock mineral composition analysis are carried out to core (5b);
Step 2, the first volume pump (601) and the 3rd volume pump (603) piston are pushed into top;
Step 3, startup vacuum pump (10), carry out airtight test to device, vacuumize device;
Step 4, to water tank (1) topping-up, first to the pipeline of whole device, full water is carried out again to liquor room (2) full water by the first volume pump (601), get rid of the gas in pipeline and impurity;
Step 5, open sulfuretted hydrogen gas cylinder (3) and dioxide bottle (4), hydrogen sulfide gas and carbon dioxide are injected into the liquor room (2) of full water by the 3rd volume pump (603) with constant flow pattern, its amount presses component requirements preparation acidic fluid, is analyzed by the acidic fluid composition of the first tail washings handling member sampling to preparation;
Step 6, fill hydraulic oil in reactor (5), applied the confined pressure stress preset by the second volume pump (602), confined pressure stress value is determined according to the actual formation pressure of simulation;
Step 7, device is placed in isoperibol, temperature value is determined according to the formation temperature of realistic simulation;
The acidic fluid of liquor room (2), by the Pore Pressure force value of setting, is pressed into reactor (5) with constant voltage mode, the core of the saturated distilled water of displacement by step 8, the first volume pump (601);
Step 9, the 4th volume pump (604) apply constant back pressure stress, maintain reactor (5) tail end, the i.e. force value of core rear end; No longer rise until the registration of the 4th pressure transducer (804) keeps stable, record flow and the force value of the first volume pump (601), the second volume pump (602), the 3rd volume pump (603) and the 4th volume pump (604), record the registration of the first pressure transducer (801), the second pressure transducer (802), the 3rd pressure transducer (803), the 4th pressure transducer (804) and differential pressure gauge (13);
Step 10, utilize the second tail washings handling member to sample the acidic fluid by core, and contrast with the component of the acidic fluid in step 5, obtain the situation of change of acidic fluid component before and after testing;
Step 11, to circulate wash mill with distilled water in the first tail washings handling member and second tail washings handling member place's emptying acidic fluid, close each ball valve and power supply;
Step 12, physical property measurement analysis and rock mineral composition analysis are carried out to the core after experiment, and to contrast with the petrophysical parameter in step 1 and mineralogical composition, the change of rock mineral composition and acidic fluid component before and after analysis design mothod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310021884.4A CN103048261B (en) | 2013-01-21 | 2013-01-21 | Device and method for researching rock physical property parameter change under action of acid fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310021884.4A CN103048261B (en) | 2013-01-21 | 2013-01-21 | Device and method for researching rock physical property parameter change under action of acid fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103048261A CN103048261A (en) | 2013-04-17 |
| CN103048261B true CN103048261B (en) | 2014-12-31 |
Family
ID=48060981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310021884.4A Active CN103048261B (en) | 2013-01-21 | 2013-01-21 | Device and method for researching rock physical property parameter change under action of acid fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103048261B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388249B (en) * | 2014-09-03 | 2017-10-17 | 中国石油天然气股份有限公司 | Device and method for testing flow conductivity of acid-etched crack |
| CN104459084A (en) * | 2014-12-01 | 2015-03-25 | 中国石油大学(北京) | Rock anisotropy detection system |
| CN104597219B (en) * | 2014-12-26 | 2017-10-13 | 西南交通大学 | A kind of water rock chemical kinetic reaction dual system experimental rig |
| CN104675396B (en) * | 2015-02-12 | 2018-03-27 | 中国石油大学(北京) | A kind of evaluating apparatus of stratiform hard brittle shale hydration characteristics |
| CN105628500B (en) | 2016-02-17 | 2017-06-23 | 中国科学院南海海洋研究所 | A kind of temperature coefficient test system of rock thermal insulation STRESS VARIATION |
| CN110879271B (en) * | 2019-12-13 | 2021-08-20 | 大连理工大学 | CO under simulated formation condition2Experimental device and method for water-rock reaction |
| CN113738378B (en) * | 2021-09-07 | 2022-10-21 | 西南交通大学 | Chemical rock breaking medium and chemical auxiliary rock breaking method |
| CN113791027B (en) * | 2021-11-16 | 2022-02-08 | 华北科技学院(中国煤矿安全技术培训中心) | Long-term etching device for damaged rock sample |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0750022B2 (en) * | 1992-03-13 | 1995-05-31 | 石油公団 | Organic substance analysis method and apparatus using portable structure |
| CN2188205Y (en) * | 1993-10-22 | 1995-01-25 | 西南石油学院 | Rock physical property parameter testing device |
| CN1081327C (en) * | 1996-02-12 | 2002-03-20 | 青岛海洋大学 | Device for contactless continuous measuring core pore structure |
| CN1310026C (en) * | 2004-10-12 | 2007-04-11 | 中国科学院广州能源研究所 | Method and device for in-site measuring gas hydrate and deposit sediment heat stability containing hydrate |
| CN101532936B (en) * | 2009-04-14 | 2013-01-09 | 中国地质大学（武汉） | Method and device for evaluating inhibiting ability of drilling fluid on formation and decomposition of hydrate |
| CN101718725B (en) * | 2009-12-08 | 2011-09-14 | 中国科学院广州能源研究所 | Device for measuring sample thermo-physical property in situ |
| CN201730615U (en) * | 2010-06-26 | 2011-02-02 | 大庆油田有限责任公司 | Evacuating saturation device for testing rock porosity |
| CN202102631U (en) * | 2011-01-18 | 2012-01-04 | 中国地质大学（北京） | Carbon dioxide transfer physical simulation platform under geological storage conditions |
| CN102841046B (en) * | 2012-09-20 | 2014-10-29 | 中国石油大港油田勘探开发研究院 | Method for measuring rock porosity and measuring device |
| CN102879546B (en) * | 2012-09-25 | 2014-08-06 | 成都理工大学 | Method for testing acidic rock reaction dynamic parameters for simulating flat-plate flow |
-
2013
- 2013-01-21 CN CN201310021884.4A patent/CN103048261B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103048261A (en) | 2013-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103048261B (en) | Device and method for researching rock physical property parameter change under action of acid fluid | |
| CN104535426B (en) | The triaxial stress of CT real time scans, seepage flow, chemical Coupling rheological test system | |
| Zhao et al. | CO2 breakthrough pressure and permeability for unsaturated low-permeability sandstone of the Ordos Basin | |
| CN111122416A (en) | Test system for measuring gas permeation parameters of ultra-low permeability medium under multi-field multi-phase coupling condition | |
| CN201716256U (en) | Soil mass permeability testing device | |
| CN102053141B (en) | Method for testing desorption characteristic of externally added water on gas-containing coal body | |
| Xu et al. | Gas breakthrough in saturated compacted GaoMiaoZi (GMZ) bentonite under rigid boundary conditions | |
| CN105203411A (en) | Slit shear-seepage coupling test system of triaxial cell and test method | |
| Cui et al. | Investigation on gas migration in saturated bentonite using the residual capillary pressure technique with consideration of temperature | |
| CN104897543A (en) | Multi-phase permeameter and rock permeability determination method | |
| CN103558137B (en) | A kind of device measuring porous medium air water two-phase relative permeability | |
| CN103411869A (en) | Negative pressure osmosis test device | |
| CN113075109B (en) | Underground gas storage reservoir drying salting-out blocking injury experiment simulation system and method | |
| CN203929557U (en) | A kind of gas bearing shale crack develops and seepage flow characteristics proving installation | |
| CN202956329U (en) | Indoor grouting test device under action of simulated complex stress | |
| CN105784567B (en) | Equipment and method for testing relative permeability of rock core | |
| CN110044792B (en) | Multifunctional low-permeability medium gas permeability testing device and testing method | |
| CN105334142A (en) | Experiment device for simulating shield mud membrane formation | |
| Zhou et al. | Laboratory investigations of the hydro-mechanical–chemical coupling behaviour of sandstone in CO 2 storage in aquifers | |
| CN110924907B (en) | Multi-section pressure measurement water-gas alternating oil extraction experimental device and method for CT scanning | |
| CN217332081U (en) | CO in rock chemical corrosion environment 2 Triaxial seepage test system | |
| CN103983533A (en) | Test device and test method for crack evolution and seepage characteristic of gas-containing shale | |
| CN112858156A (en) | Bentonite erosion simulation test device and test method | |
| CN114460120A (en) | Simulation experiment device and method for dense oil imbibition replacement based on nuclear magnetic resonance | |
| CN113740196A (en) | Device and method for measuring carbon sequestration amount of in-situ pyrolysis organic mineral layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |