CN103452548B - Experimental device and method for evaluating rock characteristics of steam reforming reservoir - Google Patents
Experimental device and method for evaluating rock characteristics of steam reforming reservoir Download PDFInfo
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- CN103452548B CN103452548B CN201310346555.7A CN201310346555A CN103452548B CN 103452548 B CN103452548 B CN 103452548B CN 201310346555 A CN201310346555 A CN 201310346555A CN 103452548 B CN103452548 B CN 103452548B
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- 239000011435 rock Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000629 steam reforming Methods 0.000 title abstract 2
- 238000012544 monitoring process Methods 0.000 claims abstract description 44
- 238000011156 evaluation Methods 0.000 claims abstract description 30
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 29
- 230000009466 transformation Effects 0.000 claims abstract description 29
- 239000011229 interlayer Substances 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 230000007797 corrosion Effects 0.000 claims abstract description 17
- 238000005260 corrosion Methods 0.000 claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 16
- 239000011148 porous material Substances 0.000 claims abstract description 11
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- -1 ether ether ketone Chemical class 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003203 everyday effect Effects 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 5
- 238000013170 computed tomography imaging Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 8
- 230000000007 visual effect Effects 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a steam reforming reservoir rock characteristic evaluation experimental device and a method, wherein the experimental device comprises a model system, a steam injection system, a steam extraction system, a confining pressure control system, an overlying pressure control system, a vacuumizing system, a fluid analysis system and an image acquisition and analysis system; steam is injected from the steam chamber to provide a high-temperature and high-pressure contact environment for the bottom of the full-diameter core of the actual core, the steam monitoring chamber provides the actual oil deposit overburden pressure, and the steam is used for simulating the transformation of the pore structure of the core at the upper part of the steam injection well and the corrosion action on the interlayer core in the steam injection process in the actual oil deposit; sampling and analyzing fluid at the top of the rock core in a steam monitoring chamber, and monitoring the steam breakthrough condition of different rock core samples in time; and the industrial CT imaging scans the rock core at proper time, analyzes the corrosion and breakthrough conditions of different rock core samples under different steam injection conditions, and provides key operation parameters for the steam injection development of the heterogeneous oil reservoir with a large amount of developed interlayers.
Description
Technical field
The invention relates to rock characteristic evaluation experimental device and method in field of oil development, particularly relate to a kind of steam of high temperature and high pressure steam to the corrosion of dissimilar rock and reformation characteristics description and Visual evaluation that can be used for and transform reservoir petrologic characteristic evaluation experimental device and method.
Background technology
By continental deposit ambient influnence, China's HEAVY OIL RESERVOIR non-homogeneity is general stronger, grow in reservoir and have a large amount of interlayers, wherein, interlayer refers to the interlayer be made up of part mud stone, siltstone or calcareous mineralogical composition, interlayer inside has certain permeability, and usual permeability is 1 ~ 0.0001 × 10
-3um
2.In steam flooding of heavy oil reservoir process, because interlayer permeability is very low, the growth of interlayer on vapor chamber is played and is significantly blocked impact, stop the upwards onlap of vapor chamber in reservoir inside to a certain extent and outwards continue expansion, thus having influence on effectively the employing of interlayer top oil reservoir reserves, the yield level of steam injection development oil reservoir and ultimate recovery.But meet high-temperature steam condensed water due to the shale composition in interlayer can occur to dissolve and corrosion, and in steam injection process, pressure and the temperature of injecting steam all can produce material impact to the corrosion speed of interlayer, therefore, by carrying out the corrosion laboratory experiment of dissimilar interlayer under steam injection condition, the speed of the dissimilar interlayer of steam corrosion can be obtained, the important parameters such as the operating pressure of steam corrosion interlayer the best and temperature, and steam finally breaks through the time that interlayer continues upwards to expand, interlayer is broken through for instructing Oil Field steam injection, realize the expansion of vapor chamber Quick uniform to have great importance with high-efficiency mining.
In addition, steam directly has influence on the growth of vapor chamber to the transformation of reservoir rock, to low permeability reservoir rock, long period of soaking in a steam ambient, because rock degree of consolidation, wetability etc. are along with the change of hot conditions, the crucial physical property such as reservoir internal pore structure, permeability can change thereupon, and quantitative description and analysis steam, to the transformation effect of reservoir rock, are formulated most important to the regulation measure that the vapor chamber of heterogeneous reservoir is evenly grown.
Systematic method and apparatus is not also had for high temperature and high pressure steam, the transformation of dissimilar reservoir rock and Dissolution Characteristics to be described to the Visual evaluation of process at present.
Thus, the present inventor relies on experience and the practice of being engaged in relevant industries for many years, proposes a kind of steam transformation reservoir petrologic characteristic evaluation experimental device and method, to overcome the defect of prior art.
Summary of the invention
The object of the present invention is to provide a kind of steam to transform reservoir petrologic characteristic evaluation experimental device and method, for high temperature and high pressure steam, process is described to the transformation of dissimilar reservoir rock and Dissolution Characteristics and carry out Visual evaluation.
The object of the present invention is achieved like this, a kind of steam transformation reservoir petrologic characteristic evaluation experimental device, and described experimental facilities comprises:
Model system, described model system is made up of the rock core arranged in the clamper be fixedly installed in a hyperbaric chamber and clamper thereof; Described clamper comprises tubular body, and the sealing of these tubular body two ends is provided with the end and blocks up, and described rock core is fixedly installed in the middle part of tubular body, at the bottom of described side stifled with rock core between form steam and monitor room, block up at the bottom of described opposite side and form vaporium between rock core;
Steam injection system, described steam injection system is made up of steam generator and the first one way valve, and this steam injection system passes through line seal conducting in vaporium;
Steam extraction system, described steam extraction system is made up of the second one way valve, condenser, back-pressure valve, and this steam extraction system passes through line seal conducting in vaporium;
Confined pressure control system, described confined pressure control system is made up of the first gas cylinder, the first gas flow controller, the first gas boosting pump, the 3rd one way valve, and this confined pressure control system passes through line seal conducting in hyperbaric chamber;
Burden pressure control system, described burden pressure control system is made up of the second gas cylinder, the second gas flow controller, the second gas boosting pump, the 4th one way valve, and this burden pressure control system monitors room by line seal conducting in steam;
Pumped vacuum systems, described pumped vacuum systems is made up of vacuum pump and the 5th one way valve be arranged in parallel, the 6th one way valve and the 7th one way valve, and described 5th, the 6th and the 7th one way valve monitors room respectively by line seal conducting in hyperbaric chamber, vaporium, steam;
Fluid analytical systems, described fluid analytical systems is made up of sampler, gas collection bottle, condensation water collection bottle, the 8th one way valve, and this fluid analytical systems monitors room by line seal conducting in steam;
IMAQ and analytical system, it is made up of industry CT and computer; Described hyperbaric chamber is arranged in the scanning cabin of industry CT movably.
In a better embodiment of the present invention, described clamper is in vertically placing, and rock core top is steam monitoring room, and rock core bottom is vaporium; The end of upper/lower terminal is stifled is that thread seal is connected with tubular body; Corresponding line seal was blocked up through the described upper and lower end.
In a better embodiment of the present invention, between described rock core both sides and the upper and lower end are stifled, be sequentially provided with grommet, support ring and joint ring.
In a better embodiment of the present invention, be equipped with a sealing-plug respectively during the described upper and lower end is stifled, described sealing-plug and the end, blocked up as being threaded; Corresponding line seal monitors room or vaporium through described sealing-plug conducting in the steam of correspondence.
In a better embodiment of the present invention, described two support ring wall thickness are 1/4 of described clamper internal diameter, and described two grommet internal diameters are 1/2 of described clamper internal diameter.
In a better embodiment of the present invention, described hyperbaric chamber, clamper and the grommet of inside thereof, the material of support ring are the heat resisting and pressure resisting ether ether ketone for CT transmission scan; The most high-temperature resistant 250 DEG C of described clamper, described clamper and the highest withstand voltage 12 ~ 13MPa of hyperbaric chamber.
In a better embodiment of the present invention, the first gas cylinder in described confined pressure control system is nitrogen cylinder.
In a better embodiment of the present invention, described hyperbaric chamber, vaporium and steam monitoring indoor are respectively equipped with temperature and pressure monitor.
Object of the present invention can also realize like this, and a kind of steam transformation reservoir petrologic characteristic evaluation experimental method, said method comprising the steps of:
A, pipeline and model connect;
The tubular body of described clamper erect and place, its bottom adopts external screw thread stifled at the bottom of internal thread and bottom to be tightly connected, and at the bottom of described bottom, stifled also employing with described sealed bottom plug is threaded; At the bottom of the bottom of described clamper, block side put a joint ring, put a support ring on sealing ring top, put a grommet on this support ring top, on this grommet, place testing rock core; Another grommet is placed on described rock core top, another support ring is placed on this another grommet top, another joint ring is placed on this another support ring top, adopt internal thread be tightly connected with external screw thread stifled at the bottom of top and seal on described clamper top, be threaded blocking up at the bottom of described top to adopt with described top seal plug and seal; The described clamper connected is utilized and is bolted to hyperbaric chamber inside, and close hyperbaric chamber;
B, model vacuumize;
The vacuum pump of described pumped vacuum systems is utilized vaporium, steam monitoring room and hyperbaric chamber to be vacuumized;
C, injection steam;
Open steam generator, open the first one way valve, in vaporium, inject steam by respective line;
D, burden pressure control;
Open the second gas cylinder, the second gas flow controller, the second gas boosting pump, the 4th one way valve, the second gas boosting pump is utilized to monitor indoor nitrogen injection to steam, and utilize the temperature and pressure monitor timely monitor vaporium of vaporium and steam monitoring indoor and the pressure change of steam monitoring indoor, steam room pressure monitors room pressure a little more than steam, and both differences are no more than 0.5MPa;
E, confined pressure control;
Open the first gas cylinder, the first gas flow controller, the first gas boosting pump, the 3rd one way valve, utilize described first gas boosting pump to nitrogen injection in hyperbaric chamber, to produce confined pressure to model; Utilize confined pressure pressure in the temperature and pressure monitor timely monitor hyperbaric chamber in hyperbaric chamber, control confined pressure a little less than described steam monitoring chamber pressure, both differences are no more than 0.2Mpa;
F, extraction steam;
When steam monitoring room pressure is elevated to experiment test pressure, close the 4th one way valve of described upper-coated pressure system, open the second one way valve of described steam extraction system, be experiment test pressure by described back-pressure valve pressure setting, continue to inject steam by described steam injection system, control steam rate of withdrawal and pressure, to guarantee that in described vaporium, pressure and temp is constant by back-pressure valve simultaneously;
G, rock core Top fluidic are analyzed;
At set intervals, open the 8th one way valve of described fluid analytical systems, utilize described sampler from described steam monitoring room samples fluid, whether have condensed water to occur in observation condensation water collection bottle, thus judge that steam breaks through the time of rock core; While every sub-sampling, open the 4th one way valve of described upper-coated pressure system, supplement nitrogen to described steam monitoring is indoor, to balance the pressure of described steam monitoring room;
H, rock core pore structure change scanning and analysis;
Utilize the industry CT of described IMAQ and analytical system to scan and imaging model, under in good time analyzing high temperature steam environments, different temperature and pressure condition are to the variation characteristic of the reformation characteristics of rock core pore structure and steam corrosion interlayer rock.
In a better embodiment of the present invention, in step G: sample frequency is: once/per hour ~ once/every day; For accurately judging that condensed water appears in steam monitoring indoor, do not cause again steam to monitor indoor pressure oscillation, the fluid volume of every sub-sampling is 0.1 ~ 0.2 liter simultaneously.
In a better embodiment of the present invention, in steph: scan frequency be 2 ~ 6 hours once.
From the above mentioned, steam of the present invention transformation reservoir petrologic characteristic evaluation experimental device and method, may be used for high temperature and high pressure steam and describes process to the transformation of dissimilar reservoir rock and Dissolution Characteristics and carry out Visual evaluation; Described vaporium is utilized to inject steam for providing the contact environment of a HTHP bottom the actual full-hole core getting core, utilize steam to monitor room and actual oil reservoir burden pressure is provided, can simulate in actual oil reservoir in steam injection process, inject steam to the transformation of steam injection aboveground portion rock core pore structure and the corrosion to interlayer rock core; Utilize from the indoor rock core Top fluidic sample analysis of described steam monitoring, the steam of the different rock core sample of timely monitor can break through situation; Utilize industry CT imaging in good time to rock core scanning, can analyze the corrosion of different rock core sample under different steam injection condition and breakthrough situation, the heterogeneous reservoir steam injection development of growing in a large number for interlayer provides the operating parameter of key.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1: be the structural representation of steam transformation reservoir petrologic characteristic evaluation experimental device of the present invention.
Fig. 2: be the clamper internal construction schematic diagram of experimental facilities of the present invention.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.
As shown in Figure 1 and Figure 2, the present invention proposes a kind of steam transformation reservoir petrologic characteristic evaluation experimental device 100, and described experimental facilities 100 comprises: model system 1, steam injection system 2, steam extraction system 3, confined pressure control system 4, burden pressure control system 5, pumped vacuum systems 6, fluid analytical systems 7 and IMAQ and analytical system 8;
Described model system 1 is made up of the rock core 12 arranged in the clamper 11 be fixedly installed in a hyperbaric chamber 13 and clamper 11 thereof; As shown in Figure 2, in the present embodiment, described clamper 11 is in vertically placing, described clamper 11 comprises cylindrical-shaped main body 111, the sealing of this cylindrical-shaped main body 111 upper/lower terminal is provided with the end stifled 112,113, described rock core 12 is fixedly installed in the middle part of cylindrical-shaped main body 111, stifledly at the bottom of described upside forms steam between 112 and rock core 12 and monitor room 114, blocks up and form vaporium 115 between 113 and rock core 12 at the bottom of described downside; Situation is broken through for the steam at timely monitor reservoir core top in described steam monitoring room 114; Described vaporium 115 for for providing constant temperature and pressure steam ambient bottom reservoir core, with corrosion reservoir core; Grommet 116, support ring 117 and joint ring 118 is sequentially provided with at described rock core 12 both sides and the upper and lower end stifled 112,113; A sealing-plug 119 is equipped with respectively at the described upper and lower end stifled 112,119;
Described steam injection system 2 is made up of steam generator 21 and the first one way valve 22, and this steam injection system 2 passes through line seal conducting in vaporium 115;
Described steam extraction system 3 is made up of the second one way valve 31, condenser 32, back-pressure valve 33, and this steam extraction system 3 passes through line seal conducting in vaporium 115;
Described confined pressure control system 4 is made up of the first gas cylinder 41, first gas flow controller 42, first gas boosting pump 43, the 3rd one way valve 44, and this confined pressure control system 4 passes through line seal conducting in hyperbaric chamber 13;
Described burden pressure control system 5 is made up of the second gas cylinder 51, second gas flow controller 52, second gas boosting pump 53, the 4th one way valve 54, and this burden pressure control system 5 monitors room 114 by line seal conducting in steam;
Described pumped vacuum systems 6 is made up of vacuum pump 61 and the 5th one way valve 62 be arranged in parallel, the 6th one way valve 63 and the 7th one way valve 64, and described 5th, the 6th and the 7th one way valve monitors room 114 respectively by line seal conducting in hyperbaric chamber 13, vaporium 115, steam;
Described fluid analytical systems 7 is made up of sampler 71, gas collection bottle 72, condensation water collection bottle 73, the 8th one way valve 74, and this fluid analytical systems 7 monitors room 114 by line seal conducting in steam; The sample tap of described sampler 71 is close to reservoir core top in steam monitoring room 114, utilize described sampler to extract steam monitoring fluid inside sample in good time, analyze condensed water content, the steam break through of different-thickness reservoir core can be monitored, and carry out that vaporium stress level and pressure pulse break through steam affect quantitative analysis;
IMAQ and analytical system 8 are made up of industry CT 81 and computer 82; Described hyperbaric chamber 13 is arranged in the scanning cabin of industry CT 81 movably.In the present embodiment, described hyperbaric chamber 13 external dimensions is less than the scanning cabin of described industry CT, to carry out on-line continuous scanning to described model system in described industry CT, and utilize described computer to analyze scan image, visual accurate description can be carried out to the Dissolution Characteristics of the pore structure variation characteristic of reservoir core and steam.
Further, as shown in Figure 2, the end of upper/lower terminal, blocks up 112,113 with cylindrical-shaped main body 111 for thread seal is connected; Described sealing-plug 119 is stifled also for being threaded with each end; Corresponding line seal monitors room 114 or vaporium 115 through the conducting of described upper and lower sealing-plug 119 in the steam of correspondence; Described sealing-plug, for introducing described filling line and monitoring pipeline, is tightly connected with high temperature high voltage resistant rubber and sealing-plug outside corresponding pipeline.
In the present embodiment, described two support ring 117 wall thickness are 1/4 of described clamper internal diameter, and described two grommet 116 internal diameters are 1/2 of described clamper internal diameter; Described grommet 116 effect is fixing test rock core 12, in case rock core collapses suddenly in corrosion process; The position of described lower support ring 117 inner hollow forms vaporium 115, and the position of upper support ring 117 inner hollow forms steam monitoring room 114.
In the present embodiment, described hyperbaric chamber 13, clamper 11 and the grommet 116 of inside thereof, the material of support ring 117 are can for heat resisting and pressure resisting ether ether ketone (PEEK) material of CT transmission scan; The most high-temperature resistant 250 DEG C of described clamper 11, described clamper 11 and the highest withstand voltage 12 ~ 13MPa of hyperbaric chamber 13.
The first gas cylinder 41 in described confined pressure control system 4 is nitrogen cylinder, because nitrogen has good heat-proof quality, therefore adiabatic heat-insulation effect can be played to clamper 11, simultaneously because gas has better mobility, therefore use nitrogen as confined pressure gas, can realize exerting pressure to clamper each position equilibrium.
In the present embodiment, temperature and pressure monitor 9 is respectively equipped with in described hyperbaric chamber 13, vaporium 115 and steam monitoring room 114.
The present invention also provides a kind of method utilizing above-mentioned steam transformation reservoir petrologic characteristic evaluation experimental device 100 to carry out evaluation experimental, said method comprising the steps of:
A, pipeline and model connect;
The tubular body 111 of described clamper 11 is erect placement, and its bottom adopts the external screw thread blocking up 113 at the bottom of internal thread and bottom to be tightly connected, and blocks up 113 and also adopt with described sealed bottom plug 119 and be threaded at the bottom of described bottom; Put a joint ring 118 block up 113 at the bottom of the bottom of described clamper on the upside of, put a support ring 117 on sealing ring 118 top, put a grommet 116 on this support ring top, on this grommet 116, place testing rock core 12; Another grommet 116 is placed on described rock core 12 top, another support ring 117 is placed on this another grommet 116 top, another joint ring 118 is placed on this another support ring 117 top, adopt internal thread be tightly connected with the external screw thread blocking up 112 at the bottom of top and seal on described clamper top, to adopt with described top seal plug 119 and be threaded by blocking up 112 at the bottom of described top and seal; Utilized by the described clamper 11 connected bolt (four equally distributed bolts) to be fixed on hyperbaric chamber 13 inner, and close hyperbaric chamber 13;
B, model vacuumize;
The vacuum pump 61 of described pumped vacuum systems 6 is utilized vaporium 115, steam monitoring room 114 and hyperbaric chamber 13 to be vacuumized;
C, injection steam;
Open steam generator 21, open the first one way valve 22, in vaporium 115, inject steam by respective line;
D, burden pressure control;
Open the second gas cylinder 51, second gas flow controller 52, second gas boosting pump 53, the 4th one way valve 54, utilize the second gas boosting pump 53 to nitrogen injection in steam monitoring room 114, and utilize the pressure of the temperature and pressure monitor 9 timely monitor vaporium in vaporium 115 and steam monitoring room 114 and steam monitoring indoor to change, in vaporium 115, pressure is a little more than pressure in steam monitoring room 114, and both differences are no more than 0.5MPa;
E, confined pressure control;
Open the first gas cylinder 41, first gas flow controller 42, first gas boosting pump 43, the 3rd one way valve 44, utilize described first gas boosting pump 43 to nitrogen injection in hyperbaric chamber 13, to produce confined pressure to model; Utilize confined pressure pressure in the temperature and pressure monitor 9 timely monitor hyperbaric chamber in hyperbaric chamber, control confined pressure a little less than described steam monitoring room 114 pressure, both differences are no more than 0.2Mpa;
F, extraction steam;
When steam monitoring room pressure is elevated to experiment test pressure, close the 4th one way valve 54 of described upper-coated pressure system 5, open the second one way valve 31 of described steam extraction system 3, be experiment test pressure by described back-pressure valve 33 pressure setting, continue to inject steam by described steam injection system 2, control steam rate of withdrawal and pressure by back-pressure valve 33, to guarantee that in described vaporium 115, pressure and temp is constant simultaneously;
G, rock core Top fluidic are analyzed;
At set intervals, open the 8th one way valve 74 of described fluid analytical systems 7, utilize described sampler 71 from described steam monitoring room 114 samples fluid, sample frequency is: once/per hour ~ once/every day; Whether there is condensed water to occur in observation condensation water collection bottle 72, thus judge that steam breaks through the time of rock core; For accurately judging to occur condensed water in steam monitoring room 114, do not cause again steam to monitor indoor pressure oscillation, the fluid volume of every sub-sampling is 0.1 ~ 0.2 liter simultaneously; While every sub-sampling, open the 4th one way valve 54 of described upper-coated pressure system 5, in described steam monitoring room 114, supplement nitrogen, to balance the pressure of described steam monitoring room;
H, rock core pore structure change scanning and analysis;
Utilize industry CT 81 pairs of models of described IMAQ and analytical system to scan and imaging, scan frequency be 2 ~ 6 hours once; Under in good time analysis high temperature steam environments, different temperature and pressure condition are to the variation characteristic of the reformation characteristics of rock core pore structure and steam corrosion interlayer rock.
From the above mentioned, steam of the present invention transformation reservoir petrologic characteristic evaluation experimental device and method, may be used for high temperature and high pressure steam and describes process to the transformation of dissimilar reservoir rock and Dissolution Characteristics and carry out Visual evaluation; Described vaporium is utilized to inject steam for providing the contact environment of a HTHP bottom the actual full-hole core getting core, utilize steam to monitor room and actual oil reservoir burden pressure is provided, can simulate in actual oil reservoir in steam injection process, inject steam to the transformation of steam injection aboveground portion rock core pore structure and the corrosion to interlayer rock core; Utilize from the indoor rock core Top fluidic sample analysis of described steam monitoring, the steam of the different rock core sample of timely monitor can break through situation; Utilize industry CT imaging in good time to rock core scanning, can analyze the corrosion of different rock core sample under different steam injection condition and breakthrough situation, the heterogeneous reservoir steam injection development of growing in a large number for interlayer provides the operating parameter of key.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.
Claims (11)
1. a steam transformation reservoir petrologic characteristic evaluation experimental device, is characterized in that: described experimental facilities comprises:
Model system, described model system is made up of the rock core arranged in the clamper be fixedly installed in a hyperbaric chamber and clamper thereof; Described clamper comprises tubular body, and the sealing of these tubular body two ends is provided with the end and blocks up, and described rock core is fixedly installed in the middle part of tubular body, at the bottom of described side stifled with rock core between form steam and monitor room, block up at the bottom of described opposite side and form vaporium between rock core;
Steam injection system, described steam injection system is made up of steam generator and the first one way valve, and this steam injection system passes through line seal conducting in vaporium;
Steam extraction system, described steam extraction system is made up of the second one way valve, condenser, back-pressure valve, and this steam extraction system passes through line seal conducting in vaporium;
Confined pressure control system, described confined pressure control system is made up of the first gas cylinder, the first gas flow controller, the first gas boosting pump, the 3rd one way valve, and this confined pressure control system passes through line seal conducting in hyperbaric chamber;
Burden pressure control system, described burden pressure control system is made up of the second gas cylinder, the second gas flow controller, the second gas boosting pump, the 4th one way valve, and this burden pressure control system monitors room by line seal conducting in steam;
Pumped vacuum systems, described pumped vacuum systems is made up of vacuum pump and the 5th one way valve be arranged in parallel, the 6th one way valve and the 7th one way valve, and described 5th, the 6th and the 7th one way valve monitors room respectively by line seal conducting in hyperbaric chamber, vaporium, steam;
Fluid analytical systems, described fluid analytical systems is made up of sampler, gas collection bottle, condensation water collection bottle, the 8th one way valve, and this fluid analytical systems monitors room by line seal conducting in steam;
IMAQ and analytical system, it is made up of industry CT and computer; Described hyperbaric chamber is arranged in the scanning cabin of industry CT movably.
2. steam transformation reservoir petrologic characteristic evaluation experimental device as claimed in claim 1, is characterized in that: described clamper is in vertically placing, and rock core top is steam monitoring room, and rock core bottom is vaporium; The end of upper/lower terminal is stifled is that thread seal is connected with tubular body; Corresponding line seal was blocked up through the described upper and lower end.
3. steam transformation reservoir petrologic characteristic evaluation experimental device as claimed in claim 2, is characterized in that: described rock core both sides and the upper and lower end stifled between be sequentially provided with grommet, support ring and joint ring.
4. steam transformation reservoir petrologic characteristic evaluation experimental device as claimed in claim 3, is characterized in that: be equipped with a sealing-plug respectively during the described upper and lower end is stifled, described sealing-plug and the end are blocked up as being threaded; Corresponding line seal monitors room or vaporium through described sealing-plug conducting in the steam of correspondence.
5. steam transformation reservoir petrologic characteristic evaluation experimental device as claimed in claim 3, it is characterized in that: described two support ring wall thickness are 1/4 of described clamper internal diameter, described two grommet internal diameters are 1/2 of described clamper internal diameter.
6. steam transformation reservoir petrologic characteristic evaluation experimental device as claimed in claim 4, is characterized in that: described hyperbaric chamber, clamper and the grommet of inside thereof, the material of support ring are the heat resisting and pressure resisting ether ether ketone for CT transmission scan; The most high-temperature resistant 250 DEG C of described clamper, described clamper and the highest withstand voltage 12 ~ 13MPa of hyperbaric chamber.
7. steam transformation reservoir petrologic characteristic evaluation experimental device as claimed in claim 1, is characterized in that: the first gas cylinder in described confined pressure control system is nitrogen cylinder.
8. steam transformation reservoir petrologic characteristic evaluation experimental device as claimed in claim 1, is characterized in that: described hyperbaric chamber, vaporium and steam monitoring indoor are respectively equipped with temperature and pressure monitor.
9. utilize any one of claim 1 ~ 8 experimental facilities to carry out a method for steam transformation reservoir petrologic characteristic evaluation experimental, said method comprising the steps of:
A, pipeline and model connect;
The tubular body of described clamper erect and place, its bottom adopts external screw thread stifled at the bottom of internal thread and bottom to be tightly connected, and at the bottom of described bottom, stifled also employing with described sealed bottom plug is threaded; At the bottom of the bottom of described clamper, block side put a joint ring, put a support ring on sealing ring top, put a grommet on this support ring top, on this grommet, place testing rock core; Another grommet is placed on described rock core top, another support ring is placed on this another grommet top, another joint ring is placed on this another support ring top, adopt internal thread be tightly connected with external screw thread stifled at the bottom of top and seal on described clamper top, be threaded blocking up at the bottom of described top to adopt with described top seal plug and seal; The described clamper connected is utilized and is bolted to hyperbaric chamber inside, and close hyperbaric chamber;
B, model vacuumize;
The vacuum pump of described pumped vacuum systems is utilized vaporium, steam monitoring room and hyperbaric chamber to be vacuumized;
C, injection steam;
Open steam generator, open the first one way valve, in vaporium, inject steam by respective line;
D, burden pressure control;
Open the second gas cylinder, the second gas flow controller, the second gas boosting pump, the 4th one way valve, the second gas boosting pump is utilized to monitor indoor nitrogen injection to steam, and utilize the temperature and pressure monitor timely monitor vaporium of vaporium and steam monitoring indoor and the pressure change of steam monitoring indoor, steam room pressure monitors room pressure a little more than steam, and both differences are no more than 0.5MPa;
E, confined pressure control;
Open the first gas cylinder, the first gas flow controller, the first gas boosting pump, the 3rd one way valve, utilize described first gas boosting pump to nitrogen injection in hyperbaric chamber, to produce confined pressure to model; Utilize confined pressure pressure in the temperature and pressure monitor timely monitor hyperbaric chamber in hyperbaric chamber, control confined pressure a little less than described steam monitoring chamber pressure, both differences are no more than 0.2Mpa;
F, extraction steam;
When steam monitoring room pressure is elevated to experiment test pressure, close the 4th one way valve of described upper-coated pressure system, open the second one way valve of described steam extraction system, be experiment test pressure by described back-pressure valve pressure setting, continue to inject steam by described steam injection system, control steam rate of withdrawal and pressure, to guarantee that in described vaporium, pressure and temp is constant by back-pressure valve simultaneously;
G, rock core Top fluidic are analyzed;
At set intervals, open the 8th one way valve of described fluid analytical systems, utilize described sampler from described steam monitoring room samples fluid, whether have condensed water to occur in observation condensation water collection bottle, thus judge that steam breaks through the time of rock core; While every sub-sampling, open the 4th one way valve of described upper-coated pressure system, supplement nitrogen to described steam monitoring is indoor, to balance the pressure of described steam monitoring room;
H, rock core pore structure change scanning and analysis;
Utilize the industry CT of described IMAQ and analytical system to scan and imaging model, under in good time analyzing high temperature steam environments, different temperature and pressure condition are to the variation characteristic of the reformation characteristics of rock core pore structure and steam corrosion interlayer rock.
10. steam transformation reservoir petrologic characteristic evaluation experimental method as claimed in claim 9, is characterized in that: in step G: sample frequency is: once/per hour ~ once/every day; For accurately judging that condensed water appears in steam monitoring indoor, do not cause again steam to monitor indoor pressure oscillation, the fluid volume of every sub-sampling is 0.1 ~ 0.2 liter simultaneously.
11. steam as claimed in claim 9 transformation reservoir petrologic characteristic evaluation experimental methods, is characterized in that: in steph: scan frequency be 2 ~ 6 hours once.
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| CN103775070B (en) * | 2014-01-10 | 2016-05-04 | 西南石油大学 | A kind of full-scale wellbore stability simulator |
| CN105911253B (en) * | 2016-05-23 | 2018-06-12 | 中国科学院武汉岩土力学研究所 | Rock salt cavern interlayer collapses simulation test device and simulation experiment method |
| CN106801603B (en) * | 2016-12-27 | 2020-05-08 | 中国石油天然气股份有限公司 | Method and device for physically simulating heterogeneous oil reservoir |
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| CN112557199B (en) * | 2019-09-25 | 2022-10-04 | 中国石油天然气股份有限公司 | Rock gas breakthrough pressure measuring device suitable for high-temperature and high-pressure conditions |
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| CN111707599B (en) * | 2020-07-14 | 2023-05-09 | 中国石油大学(华东) | Device and method for accurately characterizing pore structure characteristics of steam flooding or hot water flooding reservoir rock based on CT in-situ experiment |
| CN113669054A (en) * | 2020-12-15 | 2021-11-19 | 中国石油大学(北京) | Reservoir simulation system |
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