CN103573264A - Heterogeneous reservoir water injection commingling interlayer disturbance simulation system and detection method - Google Patents
Heterogeneous reservoir water injection commingling interlayer disturbance simulation system and detection method Download PDFInfo
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Abstract
The invention belongs to the field of physical experiment equipment of petroleum and natural gas exploitation, and particularly relates to a heterogeneous reservoir water injection commingling interlayer disturbance simulation system. The system comprises a constant-flux pump, a plurality of containers, a five-way valve, a core holding unit, an X-ray tube, a detector and a data processing and imaging system. The constant-flux pump is connected with the inlet of each container through pipelines; the inlet of the five-way valve is respectively connected with the outlet of each container through pipelines. A left sealing cover of the core holding unit is provided with an injection port, the right sealing cover of the core holding unit is provided with an output port, the inner sides of the left sealing cover and the right sealing cover are sequentially provided with a core end cap rubber mat, a core end cap and a sealing rubber mat from outside to inside, a plurality of circular holes are formed in the core end cap rubber mat, and the core end cap and the sealing rubber mat are provided with a plurality of layer chambers. A plurality of layers of heterogeneous reservoir slab models are arranged in a sealing rubber sleeve. The outlet of the five-way valve is connected with the injection port, and fluid passes through the output port and enters a measuring cylinder. The heterogeneous reservoir water injection commingling layer disturbance simulation system can reflect layer disturbance degree through the composition and size of liquid amount at the output end, and visualized analysis is achieved.
Description
Technical field
The invention belongs to the Physical Experiment apparatus field of oil and gas exploitation, particularly, relate to the water filling of a kind of multilayer heterogeneous reservoir and close and adopt interlayer interference and water plugging and profile controlling research simulation system and detection method.
Background technology
The non-homogeneity of reservoir is the key factor of restriction Development Response of Oilfield, and the contradictions such as interlayer interference, the individual layer occurring in oil field development advanced by leaps and bounds, voidage-injection imbalance are all that the non-homogeneity due to reservoir causes.In heterogeneous reservoir, heterogeneity is the heterogeneous body the most macroscopical, level is minimum.Heterogeneity represents can there be a plurality of reservoirs on same oil field longitudinally, and between these reservoirs, physical property difference may be very large, and for terrestrial facies oil-gas reservoir, combination pool reservoir, heterogeneous body is even more serious especially.Heterogeneity mainly contains following performance in waterflooding extraction: multilayer is closed in the water injection well of notes, and under identical water injection pressure, each layer of unit thickness water absorbing capacity differs greatly, and the layer position water absorbing capacity that permeability is high is high, and the layer position water absorbing capacity that permeability is low is low; Startup pressure reduction during different oil-bearing stratum flooding is also different; In producing well, different layers position output, pressure differ greatly.Corresponding interlayer recovery percent of reserves, the ability of employing differ greatly thus.Therefore, the water filling of research multilayer heterogeneous reservoir close adopt and water plugging and profile controlling process in rule of interlayer interference for Oilfield adjustment water filling, improve recovery ratio tool and be of great significance.
At present, in laboratory, carrying out heterogeneous reservoir water filling closes the system of adopting interlayer interference physical analogy and has crosslinked displacement of reservoir oil dynamic analog device and long tube model in parallel.The deficiency of these two kinds of models is that the rock core of different permeabilities is placed on respectively in basket separately, and this just can not embody interlayer interference, and basket simulation is that one dimension flows in addition, and actual conditions are Three-dimensional Flow, so error is very large.Meanwhile, simulation system high temperature resistant, high pressure only can lean on the composition of output end liquid measure and volume to carry out annoyance level between conversion zone at present, cannot and involve degree to each layer of water absorption rate and carry out visual analyzing, has restricted the depth of investigation and the application of interlayer interference.
Summary of the invention
For overcoming the defect of prior art, the invention provides a kind of heterogeneous reservoir water filling closes and adopts interlayer interference simulation system and detection method, this heterogeneous reservoir water filling is closed and is adopted heterogeneous reservoir water filling between interlayer interference simulation system energy simulation layer and close the process of adopting interlayer interference process and simulation water plugging and profile controlling, by data processing and imaging system, to whole simulation process, realizes visual.
For achieving the above object, the present invention adopts following proposal:
A kind of heterogeneous reservoir water filling is closed and is adopted interlayer interference simulation system, comprise: constant-flux pump, containing the container of formation water, containing the container of composite crude oil, containing the container of contrast medium, containing container, five-way valve, core holding unit, x-ray tomography system, data processing and the imaging system of profile control agent, x-ray tomography system comprises X-ray tube and probe;
Constant-flux pump by pipeline Fen Si road respectively through the first valve, the second valve, the 3rd valve, the 4th valve and containing the container of formation water, containing the container of composite crude oil, containing the container of contrast medium, be connected containing the entrance of the container of profile control agent;
Five-way valve has four entrances and an outlet, and four entrances are respectively by the first pipeline, the second pipeline, the 3rd pipeline, the 4th pipeline and containing the container of formation water, containing the container of composite crude oil, containing the container of contrast medium, be connected containing the outlet of the container of profile control agent;
Core holding unit is hollow cuboid, and core holding unit is enclosed and formed by front capping, rear seal-cover, left sealing cap, right aling cap, upper cover, lower capping;
Left sealing cap at core holding unit arranges a plurality of inlets from top to bottom along vertical axis direction, and in the vertical axis, right aling cap edge of core holding unit, direction arranges a plurality of output mouths from top to bottom;
Upper cover center arranges hydraulic pressure outlet, and lower capping center arranges hydraulic pressure entrance; Upper cover is provided with pressure gauge; Hydraulic pressure entrance is connected with hydraulic conveyor by pipeline, and hydraulic pressure exit is provided with by-pass valve control;
At the left sealing cap of core holding unit, the inner side ecto-entad of right aling cap is all provided with rock core plug rubber cushion, rock core plug and seal gasket successively; Rock core plug rubber cushion is provided with a plurality of circular holes, and rock core plug is provided with a plurality of floor chamber, and seal gasket is provided with a plurality of floor chamber;
Cartridge is hollow cuboid, left and right uncovered; In cartridge, be provided with three layers of heterogeneous reservoir flat plate model; Three layers of heterogeneous reservoir flat plate model are three stacked forming of reservoir flat plate model with different permeabilities;
The outlet of five-way valve connects respectively the inlet of core holding unit by many pipelines, on each pipeline, be respectively equipped with by-pass valve control;
Fluid is entered in graduated cylinder by a plurality of output mouths after by core holding unit;
Core holding unit, between the X-ray tube and probe of x-ray tomography scanning system, is opened scanning system in experimentation, the fluid distribution in three layers of heterogeneous reservoir flat plate model of real time record; The probe of x-ray tomography scanning system is connected with data processing and imaging system by data line, and the photosignal of scanning is transferred to data processing and imaging system, and the whole process of water drive oil is recorded and imaging demonstration;
The circular hole number of the number of the number of the number of inlet, output mouth, heterogeneous reservoir flat plate model, rock core plug rubber cushion, the pipeline number of inlet that the outlet of the floor chamber number of rock core plug, the floor chamber number of seal gasket, five-way valve connects respectively core holding unit is all identical.
With respect to prior art, the present invention has following beneficial effect:
1, the present invention puts the rock core of different permeabilities in same core holding unit into, has better simulated the distribution situation between subsurface reservoir, has realized the process that in water drive oil process, interlayer disturbs mutually.
2, the present invention has guaranteed fluid flowing for Three-dimensional Flow in flat plate model, more tallies with the actual situation.
3, this present invention can not only carry out annoyance level between conversion zone by composition and the volume of output end liquid measure, and can close and adopt simulation process and realize visual analyzing whole water filling.
Accompanying drawing explanation
Fig. 1 is that heterogeneous reservoir water filling is closed and adopted interlayer interference simulation system structural representation;
Fig. 2 is that three layers of heterogeneous reservoir flat plate model core holding unit are along inlet-output mouth vertical section schematic diagram;
Fig. 3 is flat plate model core holding unit A-A sectional drawing;
Fig. 4 is flat plate model core holding unit B-B sectional drawing;
Fig. 5 a is flat plate model core holding unit left view;
Fig. 5 b is flat plate model core holding unit right view;
Fig. 5 c is flat plate model left sealing cap schematic three dimensional views
Fig. 6 a is rock core plug rubber cushion left view;
Fig. 6 b is rock core plug rubber cushion sectional drawing;
Fig. 6 c is rock core plug rubber cushion schematic three dimensional views
Fig. 7 a is rock core plug left view;
Fig. 7 b is rock core plug sectional drawing;
Fig. 7 c is rock core plug schematic three dimensional views
Fig. 8 a is seal gasket left view;
Fig. 8 b is seal gasket sectional drawing;
Fig. 8 c is seal gasket schematic three dimensional views
In Fig. 1,1, constant-flux pump, 2, the first valve, 3, the second valve, 4, the 3rd valve, 5, the 4th valve, 6, containing the container of formation water, 7, containing the container of composite crude oil, 8, containing the container of contrast medium, 9, containing the container of profile control agent, 10, five-way valve, 111, the 5th valve, 112, the 6th valve, 113, the 7th valve, 12, core holding unit, 13, pressure gauge, 14, X-ray tube, 151, the first graduated cylinder, 152, the second graduated cylinder, 153, the 3rd graduated cylinder, 16, probe, 17, data processing and imaging system, 181, core holding unit top inlet, 182, core holding unit middle part inlet, 183, core holding unit bottom inlet, 191, core holding unit top output mouth, 192, core holding unit middle part output mouth, 193, core holding unit bottom output mouth, 21, core holding unit capping, 22, rock core plug rubber cushion, 23, rock core plug, 24, seal gasket, 25, cartridge, 26, three layers of heterogeneous reservoir flat plate model, 27, hydraulic pressure entrance, 28, hydraulic conveyor, 29, hydraulic pressure outlet, 30, by-pass valve control.
The specific embodiment
As shown in Figure 1, heterogeneous reservoir water filling is closed and is adopted interlayer interference simulation system, comprise: constant-flux pump 1, containing the container 6 of formation water, containing the container 7 of composite crude oil, containing the container 8 of contrast medium, containing container 9, five-way valve 10, core holding unit 12, x-ray tomography system, data processing and the imaging system 17 of profile control agent, x-ray tomography system comprises X-ray tube 14 and probe 16.
Constant-flux pump 1 by pipeline Fen Si road respectively through the first valve 2, the second valve 3, the 3rd valve 4, the 4th valve 5 and containing the container 6 of formation water, containing the container 7 of composite crude oil, containing the container 8 of contrast medium, be connected containing the entrance of the container 9 of profile control agent; In constant-flux pump, be full of distilled water and produce stable pressure driving container 6 containing formation water, containing the container 7 of composite crude oil, containing the container 8 of contrast medium, containing the fluid of the container 9 of profile control agent as displacing medium.Switch by the first valve 2, the second valve 3, the 3rd valve 4 and the 4th valve 5 can selectively be pumped into the fluid in constant-flux pump 1 container 6 containing formation water, containing the container 7 of composite crude oil, containing the container 8 of contrast medium or containing the container 9 of profile control agent.
The described contrast medium containing filling in the container 8 of contrast medium is iodized oil contrast medium, iodized oil contrast medium is the bonding agent of poppy seed oil and iodine, what iodized oil contrasted is 40% containing iodine concentration, iodine is nonpolar molecule, and vegetable oil has long nonpolar group, therefore iodine can be dissolved in vegetable oil, in vegetable oil, there is in addition undersaturated carbon-carbon bond, therefore also can with halogen iodine generation addition reaction, so iodized oil can be dissolved in crude oil.
Five-way valve 10 has four entrances and an outlet, and four entrances are respectively by the first pipeline, the second pipeline, the 3rd pipeline, the 4th pipeline and containing the container 6 of formation water, containing the container 7 of composite crude oil, containing the container 8 of contrast medium, be connected containing the outlet of the container 9 of profile control agent.The first pipeline, the second pipeline, the 3rd pipeline, the 4th pipeline are the inflow line of five-way valve 10.
As shown in Figure 2, core holding unit is hollow cuboid, and core holding unit 12 is enclosed and formed by capping 21, capping 21 comprises front capping, rear seal-cover, left sealing cap, right aling cap, upper cover, lower capping (as shown in fig. 1, left side is left sealing cap, and right side is right aling cap, and upside is upper cover, downside is lower capping, the outside of paper is front capping, and the inner side of paper is rear seal-cover, and left and right directions is horizontal, vertical paper direction is that longitudinally short transverse is vertical).Between the front capping of core holding unit, rear seal-cover, left sealing cap, right aling cap, upper cover, lower capping, be tightly connected.
As shown in Fig. 2, Fig. 5 a and Fig. 5 c, in the vertical axis, left sealing cap edge of core holding unit 12, direction sets gradually three inlets from top to bottom: core holding unit top inlet 181, core holding unit middle part inlet 182, core holding unit bottom inlet 183.The second inlet 182 is positioned at the geometric center point place of left sealing cap, and core holding unit top inlet 181 and core holding unit bottom inlet 183 are arranged symmetrically with up and down about core holding unit middle part inlet 182.As shown in Fig. 2 and Fig. 5 b, in the vertical axis, right aling cap edge of core holding unit 12, direction sets gradually three output mouths from top to bottom: core holding unit top output mouth 191, core holding unit middle part output mouth 192, core holding unit bottom output mouth 193.The second output mouth 192 is at the geometric center point place of right aling cap, and the first output mouth 191 and tertiary industry outlet 193 are arranged symmetrically with up and down about the second output mouth 192.The first inlet 181 equates with the distance between the second output mouth 192 with distance and the first output mouth 191 between the second inlet 182; Be that left sealing cap, right aling cap are symmetrical arranged about the longitudinal axis of core holding unit.Upper cover center arranges hydraulic pressure outlet 29, and lower capping center arranges hydraulic pressure entrance 27; Upper cover is also provided with pressure gauge 13.
At the left sealing cap of core holding unit 12, the inner side ecto-entad of right aling cap is all provided with rock core plug rubber cushion 22, rock core plug 23 and seal gasket 24 successively.Rock core plug 23 seals by seal gasket 24 with cartridge 25, and rock core plug 23 is fixed three layers of heterogeneous reservoir flat plate model 26 by seal gasket 24., sealing fixing by rock core plug rubber cushion 22 between rock core plug 23 and the capping of core holding unit left/right.
As shown in Fig. 6 a, Fig. 6 b and Fig. 6 c, described rock core plug rubber cushion 22 is the cuboid that vertical axis of symmetry is provided with three circular holes.Core holding unit top inlet 181, core holding unit middle part inlet 182, core holding unit bottom inlet 183 are corresponding with three circular holes of rock core plug rubber cushion 22 respectively.The longitudinal cross-section external dimensions of rock core plug rubber cushion 22, the longitudinal cross-section external dimensions of rock core plug 23 are identical with core holding unit 12 longitudinal cross-section inside dimensions, guarantee fluid by time realize sealing.
As shown in Fig. 7 a, Fig. 7 b and Fig. 7 c, rock core plug 23 is provided with three floor chambers, and three floor chambers are rectangle, and three layer chamber sizes are identical.Rock core plug 23 is made by rigid material, plays rock core and the fixedly effect of rock core supported.
As shown in Fig. 8 a, Fig. 8 b and Fig. 8 c, seal gasket 24 is provided with three floor chambers, and three floor chambers are rectangle, and three layer chamber sizes are identical; Three floor chambers of rock core plug 23 are identical with three floor chamber sizes of seal gasket 24 respectively, and three floor chambers of rock core plug 23 are corresponding with three floor chambers of seal gasket 24 respectively.
Cartridge 25 is hollow cuboid, left and right uncovered.In cartridge 25, be provided with three layers of heterogeneous reservoir flat plate model 26; Three layers of heterogeneous reservoir flat plate model 26 are respectively the first flat plate model K1, the second flat plate model K2, the 3rd flat plate model K3 from top to bottom, and the first flat plate model, the second flat plate model, the 3rd flat plate model are cuboid slabbed construction, and measure-alike.The permeability of the first flat plate model is K1, and the permeability of the second flat plate model is K2, and the permeability of the 3rd flat plate model is K3.The first flat plate model K1, the second flat plate model K2, the 3rd flat plate model K3 be three layers of heterogeneous reservoir flat plate model 26 described in stacked composition from top to bottom.
The outlet of five-way valve 10 connects core holding unit top inlet 181, core holding unit middle part inlet 182, core holding unit bottom inlet 183 by the 5th pipeline, the 6th pipeline, the 7th pipeline respectively; On the 5th pipeline, the 6th pipeline, the 7th pipeline, be respectively equipped with the 5th by-pass valve control 111, the 6th by-pass valve control 112 and the 7th by-pass valve control 113; By the 5th by-pass valve control 111, the 6th by-pass valve control 112 and the 7th by-pass valve control 113, control arbitrary layer that fluid enters heterogeneous reservoir flat plate model 26, can simulate the mining site techniques such as seperated layer water injection, profile control and water plugging, further expand the function of apparatus of the present invention.Simultaneously, in heterogeneous reservoir flat plate model 26 Preparatory work of experiment vacuumizing phase, by the 5th by-pass valve control 111, the 6th by-pass valve control 112 and the 7th by-pass valve control 113, can close pipeline, prevent containing the container 6 of formation water, containing the container 7 of composite crude oil, containing the container 8 of contrast medium and enter under differential pressure action in three layers of heterogeneous reservoir flat plate model 26 when model vacuumizes containing the fluid in the container 9 of profile control agent.
By five switches of five-way valve 10 can control container 6 containing formation water, containing the container 7 of composite crude oil, containing the container 8 of contrast medium and enter smoothly rock core by the first pipeline, the second pipeline, the 3rd pipeline, the 4th pipeline and the 5th pipeline, the 6th pipeline, the 7th pipeline respectively containing the fluid of the container 9 of profile control agent and add and hold device 12, and then enter three layers of heterogeneous reservoir flat plate model 26, and prevent that fluid is at the container 6 containing formation water, containing the container 7 of composite crude oil, containing the container 8 of contrast medium and containing channelling mutually between the container 9 of profile control agent.
Three floor chambers of rock core plug 23, three floor chambers of seal gasket 24, three inlets 183 of core holding unit 12, the vertical center of the output mouth of core holding unit lay respectively on sustained height.
The fluid being flowed out by five-way valve 10 flows out core holding units 12 by core holding unit top output mouth 191, core holding unit middle part output mouth 192 and core holding unit bottom output mouth 193 after by core holding unit 12: the fluid being flowed out by core holding unit top output mouth 191 flows in the first graduated cylinder 151; The fluid being flowed out by core holding unit middle part output mouth 192 flows in the second graduated cylinder 152; The fluid being flowed out by core holding unit bottom output mouth 193 flows in the 3rd graduated cylinder 153.Because profit does not dissolve each other, in graduated cylinder 15, present the lower water distribution situation that oils, by graduated cylinder 15 scales, measure respectively the volume of oil, water in production fluid volume.In three graduated cylinders, there is one to occur moisturely while reaching 98% situation, close constant-flux pump 1, calculate the oil production of accumulating in each graduated cylinder.
The hydraulic pressure entrance 27 of core holding unit 12 is connected with hydraulic conveyor 28 by pipeline, the liquid being entered by hydraulic pressure entrance 27 can pressurize by upper and lower to cartridge, forward and backward four direction, the cartridge 25 that rock core is added to three layers of heterogeneous reservoir flat plate model 26 of sealing of holding in device 12 is pressurizeed, and by pressure meter 13, shows stress levels.Rock core adds the hydraulic pressure of holding device 12 and exports 29 places and be provided with by-pass valve control 30, by the switch of by-pass valve control 30, can press size by adjustable ring, can realize the ring of three layers of heterogeneous reservoir flat plate model 26 is pressed to regulation and control, pressure value is read by pressure meter 13, thus simulation Different Strata stress level.
The method of adopting interlayer interference experimental simulation is closed in heterogeneous reservoir water filling, applies above-mentioned simulation system, and concrete steps are as follows:
Step 1: adopt the rock sample that is taken from surface occurence district to cut, polish, combine according to the demand of research size, prepare three layers of heterogeneous reservoir flat plate model with different permeabilities;
Step 2: three layers of heterogeneous reservoir flat plate model 26 are cleaned, model is inserted to temperature and be controlled in the temperature control oven of 100～105 ℃ and dry and weigh, recording quality;
Step 3: will clean, dry and three layers of heterogeneous reservoir flat plate model 26 of known quality are inserted to add and held device 12, then the pipeline vacuumizing is divided three to be connected respectively on core holding unit rock top output mouth 191, core holding unit middle part output mouth 192, core holding unit bottom output mouth 193, close the 5th valve 111, the 6th valve 112, the 7th valve 113, finds time 2～8 hours;
Step 4: open the first valve 2 and the 5th valve 111, the 6th valve 112, the seven valves 113, start constant-flux pump 1, flow velocity with 0.01ml/min pumps into three layers of heterogeneous plate models 26 by saturation water through inlet in core holding unit 12, makes flat plate model fully saturated by water; In saturation water process, for anti-sealing flows out from high permeability formation, that low-permeability layer is failed is saturated, in simulation, adopt the saturated way of layering, first open the 5th valve 111, close the 6th valve 112 and the 7th valve 113, and block core holding unit middle part output mouth 192 and core holding unit bottom output mouth 193 with plug, water filling 2～8 hours, makes first floor fully saturated by water; Then close the 5th valve 111 and the 7th valve 113, open the 6th valve 112, and with plug, block core holding unit and produce top outlet 191 and core holding unit product lower part outlet 193, water filling 2～8 hours, makes the second layer fully saturated by water; Finally close the 5th valve 111 and the 6th valve 112, open the 7th valve 113, and block core holding unit top output mouth 191, core holding unit middle part output mouth 192 with plug, water filling 2～8 hours, make the 3rd layer fully saturated by water;
Wherein, water injection time is determined according to the permeability size of note layer position, judge that certain one deck position is whether by water saturated method: after water filling a period of time, measure the volume that within half an hour, in corresponding graduated cylinder, water increases, with volume, divided by the time, can obtain speed, the injection rate 0.01ml/min comparison of the speed of trying to achieve and constant-flux pump, approach or illustrate equal time this one deck rock is moisture to reach capacity.
Step 5: close the first valve 2, core holding unit top inlet 181, core holding unit middle part inlet 182, core holding unit bottom inlet 183 are all opened, the composite crude oil containing in the container 7 of composite crude oil and the contrast medium fluid-mixing that contains the container 8 of contrast medium are pumped in three layers of heterogeneous plate models 26; In order to make saturated oils process not be subject to the impact of each layer model permeability difference in size, adopt the layering saturation history described in step 4, detailed process is with reference to step 4;
Regulate the force value of the hydraulic conveyor 28 of core holding unit 12, simulated formation pressure, while observing last one deck injection, in corresponding the 3rd graduated cylinder 153, displace the water yield while no longer increasing, illustrate that three layers of non-homogeneous model are saturated by oil, measure the water yield of displacing of 153 li, the first graduated cylinder 151, the second graduated cylinder 152 and the 3rd graduated cylinder, can arrive the initial oil saturation of three layers of non-homogeneous model, close constant-flux pump 1;
Step 6: open 14 pairs of three layers of heterogeneous plate models 26 of x-ray tomography system ray tube and scan, by connecting signal data line input data processing and the imaging system 17 of probe 16, show and be dissolved with contrast medium crude oil original oil-containing distribution situation in three layers of heterogeneous reservoir flat plate model 26;
Step 7: start model internal construction scanning system, close the second valve 3 and the 3rd valve 4, open the first valve 2, open the 5th valve 111, the 6th valve 112, the 7th valve 113, start constant-flux pump 1, carry out displacement of reservoir oil by filling water experiment, the X-ray tube 14 of scanning system produces three layers of heterogeneous reservoir flat plate model 26 of ray scanning, by connecting the data line of probe 16, photosignal input data processing and the imaging system 17 of three layers of heterogeneous reservoir flat plate model 26 will be seen through, the oil migration process that in the hole of three layers of heterogeneous plate models of demonstration, 26 inner each layers, water drive contains contrast medium in real time, the nowed forming of injected water between three layers of heterogeneous reservoir, the interactional process of water drive oil and the variation of remaining oil distribution situation between layers, three graduated cylinders 15 are collected respectively the liquid of output in 12 3 output mouths 19 of core holding unit, because profit does not dissolve each other, present the lower water distribution situation that oils in graduated cylinder 15, measure respectively the volume of oil, water in production fluid volume by graduated cylinder 15 scales.In three graduated cylinders, there is one to occur moisturely while reaching 98% situation, close constant-flux pump 1, calculate the oil production of accumulating in each graduated cylinder.
Step 8: start to finish to flood pot test process from step 5, the omnidistance scanning of x-ray tomography system, by the real-time demonstration water drive oil migration characteristics of data processing and imaging system 17, can carry out three layers of heterogeneous reservoir flat plate model, 26 water drive oil processes visually, observe three layers of water filling and close rule of interlayer interference when adopting.
If also need to continue to do the simulation of water plugging and profile controlling process, first by previous action, determine high permeability formation, determine the layer position that will carry out profile control, the kind of injection profile agent, position, time that profile control agent injects etc.At this, we will inject first floor by profile control agent at hypothesis, then with this hypothesis, according to following steps, carry out:
Step 9: start model internal construction scanning system, close the first valve 1, open the 4th valve 4, open and need corresponding the 5th valve 111 in the layer of injection profile agent position, close the 6th valve 112 and the 7th valve 113, start constant-flux pump 1, to the layer position injection profile agent of required profile control.Inject after a period of time, close the 4th valve 4 and the 5th valve 111, after static a period of time, then open the first valve 1 and the 5th valve 111, the six valve 112, the seven valves 113, carry out flood pot test, detailed process and step 7,8 consistent.Relatively the cumulative oil production before and after profile control changes, and in conjunction with the procedural image of X-ray scanning system scan, just can evaluate profile control effect.
Be more than that three layers of heterogeneous reservoir water filling are closed and adopted interlayer interference and water plugging and profile controlling simulation process and detection method, utilize this experimental system also can carry out one deck, two layers, four layers even more multi-layered simulated experiment, only the left and right capping of core holding unit, rock core plug rubber cushion need to be changed into corresponding access number.
Meanwhile, the liquid that the liquid in intermediate receptacle 9 is changed into other kinds just can be realized other some functions.Such as changing polymer into, process that so just can simulating oil deposit tertiary oil recovery; Or intermediate receptacle is changed into five, and wherein two are filled with respectively blocking agent, just can simulate many rounds of inhomogeneous formation water plugging and profile controlling process etc.And this simulation system can be visual to three-dimensional flat plate modeling process implementation, so this simulation system has multi-functional, simulation threedimensional model and the visual feature of simulation process.
Claims (10)
1. a heterogeneous reservoir water filling is closed and is adopted interlayer interference simulation system, comprise: constant-flux pump, containing the container of formation water, containing the container of composite crude oil, containing the container of contrast medium, containing container, five-way valve, core holding unit, x-ray tomography system, data processing and the imaging system of profile control agent, x-ray tomography system comprises X-ray tube and probe; It is characterized in that:
Constant-flux pump by pipeline Fen Si road respectively through the first valve, the second valve, the 3rd valve, the 4th valve and containing the container of formation water, containing the container of composite crude oil, containing the container of contrast medium, be connected containing the entrance of the container of profile control agent;
Five-way valve has four entrances and an outlet, and four entrances are respectively by the first pipeline, the second pipeline, the 3rd pipeline, the 4th pipeline and containing the container of formation water, containing the container of composite crude oil, containing the container of contrast medium, be connected containing the outlet of the container of profile control agent;
Core holding unit is hollow cuboid, and core holding unit is enclosed and formed by front capping, rear seal-cover, left sealing cap, right aling cap, upper cover, lower capping;
Left sealing cap at core holding unit arranges a plurality of inlets from top to bottom along vertical axis direction, and in the vertical axis, right aling cap edge of core holding unit, direction arranges a plurality of output mouths from top to bottom;
Upper cover center arranges hydraulic pressure outlet, and lower capping center arranges hydraulic pressure entrance; Upper cover is provided with pressure gauge; Hydraulic pressure entrance is connected with hydraulic conveyor by pipeline, and hydraulic pressure exit is provided with by-pass valve control;
At the left sealing cap of core holding unit, the inner side ecto-entad of right aling cap is all provided with rock core plug rubber cushion, rock core plug and seal gasket successively; Rock core plug rubber cushion is provided with a plurality of circular holes, and rock core plug is provided with a plurality of floor chamber, and seal gasket is provided with a plurality of floor chamber;
Cartridge is hollow cuboid, left and right uncovered; In cartridge, be provided with three layers of heterogeneous reservoir flat plate model; Three layers of heterogeneous reservoir flat plate model are three stacked forming of reservoir flat plate model with different permeabilities;
The outlet of five-way valve connects respectively the inlet of core holding unit by many pipelines, on each pipeline, be respectively equipped with by-pass valve control;
Fluid is entered in graduated cylinder by a plurality of output mouths after by core holding unit;
Core holding unit, between the X-ray tube and probe of x-ray tomography scanning system, is opened scanning system in experimentation, the fluid distribution in three layers of heterogeneous reservoir flat plate model of real time record; The probe of x-ray tomography scanning system is connected with data processing and imaging system by data line, and the photosignal of scanning is transferred to data processing and imaging system, and the whole process of water drive oil is recorded and imaging demonstration;
The circular hole number of the number of the number of the number of inlet, output mouth, heterogeneous reservoir flat plate model, rock core plug rubber cushion, the pipeline number of inlet that the outlet of the floor chamber number of rock core plug, the floor chamber number of seal gasket, five-way valve connects respectively core holding unit is all identical.
2. heterogeneous reservoir water filling according to claim 1 is closed and is adopted interlayer interference simulation system, it is characterized in that: the circular hole number of the number of the number of inlet, output mouth, the number of heterogeneous reservoir flat plate model, rock core plug rubber cushion, the pipeline number that the outlet of the floor chamber number of rock core plug, the floor chamber number of seal gasket, five-way valve connects respectively the inlet of core holding unit is three.
3. according to the heterogeneous reservoir water filling described in claim 1-2, close and adopt interlayer interference simulation system, it is characterized in that: three inlets of three floor chambers of rock core plug, three floor chambers of seal gasket, core holding unit, the corresponding vertical center of three output mouths of core holding unit lay respectively on sustained height.
4. according to the heterogeneous reservoir water filling described in claim 1-3, close and adopt interlayer interference simulation system, it is characterized in that: three layers of heterogeneous reservoir flat plate model are respectively the first flat plate model, the second flat plate model, the 3rd flat plate model from top to bottom, the first flat plate model, the second flat plate model, the 3rd flat plate model are cuboid slabbed construction, and measure-alike; The permeability of the first flat plate model, the permeability of the second flat plate model, the permeability of the 3rd flat plate model is identical or different.
5. according to the heterogeneous reservoir water filling described in claim 1-4, close and adopt interlayer interference simulation system, it is characterized in that: be followed successively by from top to bottom core holding unit top inlet, core holding unit middle part inlet, core holding unit bottom inlet; The second inlet is positioned at the geometric center point place of left sealing cap, and core holding unit top inlet and core holding unit bottom inlet are arranged symmetrically with up and down about core holding unit middle part inlet; Right aling cap at core holding unit arranges three output mouths from top to bottom along vertical axis direction, is followed successively by core holding unit top output mouth, core holding unit middle part output mouth, core holding unit bottom output mouth; The second output mouth is at the geometric center point place of right aling cap, and the first output mouth and tertiary industry outlet are arranged symmetrically with up and down about the second output mouth; Left sealing cap, right aling cap are symmetrical arranged about the longitudinal axis of core holding unit.
6. according to the heterogeneous reservoir water filling described in claim 1-5, close and adopt interlayer interference simulation system, it is characterized in that: described rock core plug rubber cushion is the cuboid that vertical axis of symmetry is provided with three circular holes; Core holding unit top inlet, core holding unit middle part inlet, core holding unit bottom inlet are corresponding with three circular holes of rock core plug rubber cushion respectively; The longitudinal cross-section external dimensions of rock core plug rubber cushion, the longitudinal cross-section external dimensions of rock core plug, core holding unit longitudinal cross-section inside dimension are identical; Rock core plug is provided with three floor chambers, and three floor chambers are rectangle, and three layer chamber sizes are identical; Rock core plug is made by rigid material; Seal gasket is provided with three floor chambers, and three floor chambers are rectangle, and three layer chamber sizes are identical; Three floor chambers of rock core plug are corresponding with three floor chambers of seal gasket respectively, and three floor chambers of rock core plug are identical with three floor chamber sizes of seal gasket respectively.
7. according to the heterogeneous reservoir water filling described in claim 1-6, close and adopt interlayer interference simulation system, it is characterized in that: the outlet of five-way valve connects respectively top inlet, middle part inlet and the bottom inlet of core holding unit by the 5th pipeline, the 6th pipeline, the 7th pipeline; On the 5th pipeline, the 6th pipeline, the 7th pipeline, be respectively equipped with by-pass valve control.
8. according to the heterogeneous reservoir water filling described in claim 1-7, close and adopt interlayer interference simulation system, it is characterized in that: fluid flows out core holding unit by core holding unit top output mouth, core holding unit middle part output mouth and core holding unit bottom output mouth after by core holding unit: the fluid being flowed out by core holding unit top output mouth flows in the first graduated cylinder; The fluid being flowed out by core holding unit middle part output mouth flows in the second graduated cylinder; The fluid being flowed out by core holding unit bottom output mouth flows in the 3rd graduated cylinder.
9. according to the heterogeneous reservoir water filling described in claim 1-7, close and adopt interlayer interference simulation system, it is characterized in that: the described contrast medium containing filling in the container of contrast medium is iodized oil contrast medium; Between the front capping of core holding unit, rear seal-cover, left sealing cap, right aling cap, upper cover, lower capping, be tightly connected.
10. a method of adopting interlayer interference experimental simulation is closed in heterogeneous reservoir water filling, adopts heterogeneous reservoir water filling described in claim 1-9 to close and adopts interlayer interference simulation system, it is characterized in that, concrete steps are as follows
Step 1: adopt the rock sample that is taken from surface occurence district to cut, polish, combine according to the demand of research size, prepare the reservoir flat plate model of three layers of different permeability;
Step 2: three layers of heterogeneous plate models are cleaned, rock sample is inserted to temperature and be controlled in the temperature control oven of 100～105 ° of C and dry and weigh, recording quality;
Step 3: will clean, dry and the three layer flat plate model of known quality is inserted to add and held device, then the pipeline vacuumizing is divided three to be connected respectively on core holding unit top output mouth, core holding unit middle part output mouth, core holding unit bottom output mouth, close the 5th valve, the 6th valve, the 7th valve, finds time 2～8 hours;
Step 4: open the first valve the 5th valve, the 6th valve, the 7th valve, starts constant-flux pump, with the flow velocity of 0.01ml/min, saturation water is pumped into three layers of heterogeneous plate models through inlet in core holding unit, makes flat plate model fully saturated by water;
Step 5: close the first valve, the top of core holding unit, middle part, three of bottoms inlet are all opened, the composite crude oil containing in the container of composite crude oil and the contrast medium fluid-mixing that contains the container of contrast medium are pumped in three layers of heterogeneous plate models;
Regulate the force value of the hydraulic conveyor of core holding unit, simulated formation pressure, while observing last one deck injection, corresponding graduated cylinder is displaced the water yield while no longer increasing, measure the water yield of displacing in three graduated cylinders, can arrive the initial oil saturation of three layers of non-homogeneous model, close constant-flux pump;
Step 6: open x-ray tomography system ray tube three layers of heterogeneous plate models are scanned, by connecting signal data line input data processing and the imaging system of probe, show and be dissolved with contrast medium crude oil original oil-containing distribution situation in three layers of heterogeneous reservoir flat plate model;
Step 7: start model internal construction scanning system, close the second valve and the 3rd valve, open the first valve, open the 5th valve, the 6th valve, the 7th valve, start constant-flux pump, carry out displacement of reservoir oil by filling water experiment, the X-ray tube of scanning system produces ray scanning flat plate model, by connecting the data line of probe, photosignal input data processing and the imaging system of three layers of heterogeneous reservoir flat plate model will be seen through, the oil migration process that in the hole of inner each layers of three layers of heterogeneous plate models of demonstration, water drive contains contrast medium in real time, the nowed forming of injected water between three layers of heterogeneous reservoir, the interactional process of water drive oil and the variation of remaining oil distribution situation between layers, three graduated cylinders are collected respectively the liquid of output in three output mouths of core holding unit, have one to occur moisturely while reaching 98% situation in three graduated cylinders, close constant-flux pump, calculate the oil production of accumulating in each graduated cylinder,
Step 8: start to finish to flood pot test process from step 5, the omnidistance scanning of x-ray tomography system, by the real-time demonstration water drive oil migration characteristics of data processing and imaging system, three layers of heterogeneous reservoir flat plate model water drive oil process are carried out visual, observe three layers of water filling and close rule of interlayer interference when adopting:
Step 9: start model internal construction scanning system, close the first valve, open the 4th valve, open and need corresponding the 5th valve in the layer of injection profile agent position, close the 6th valve and the 7th valve, start constant-flux pump, to the layer position injection profile agent of required profile control; Inject after a period of time, close the 4th valve and the 5th valve, after static a period of time, then open the first valve and the 5th valve, the 6th valve, the 7th valve, carries out flood pot test; Relatively the cumulative oil production before and after profile control changes, and in conjunction with the procedural image of X-ray scanning system scan, profile control effect is evaluated.
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