CN103556994A - Experimental detecting system and detecting method for distribution of remaining oil in fracture-cavity reservoir bed - Google Patents
Experimental detecting system and detecting method for distribution of remaining oil in fracture-cavity reservoir bed Download PDFInfo
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Abstract
The invention relates to an experimental detecting system and method for distribution of remaining oil in a fracture-cavity reservoir bed. The experimental detecting system comprises a constant-flux pump, a container containing formation water, a container containing compounded crude oil, a container containing a contrast agent, a four-way valve, a fracture-cavity reservoir bed flat model, a core holder, an X-ray tomoscan system and a data processing and imaging system, wherein the container containing formation water, the container containing the compounded crude oil and the container containing the contrast agent are connected with the three inlets of the four-way valve through a first pipeline, a second pipeline and a third pipeline respectively; the outlet of the four-way valve is connected with the injection opening of the core holder through a pumping pipeline; the output opening of the core holder is used for outputting a liquid; the liquid output from the output opening of the core holder is collected in a measuring cylinder. According to the experimental detecting system and method, the oil-water displacement process under a formation condition is simulated actually, and the percolation mechanism and the remaining oil distribution rule are similar to practical water injection in a mine, so that the detection conclusion has a guiding significance in mine application, and the problem that the water injection and oil displacement process cannot be visual is solved.
Description
Technical field
The Physical Experiment apparatus field that the invention belongs to oil and gas exploitation, concrete, relate to a kind of experiment detecting system and method for stitching hole type reservoir remaining oil distribution.
Background technology
Along with developing rapidly of petroleum industry, oil and gas prospect field constantly expands, and carbonate rock hydrocarbon reservoir is found in a large number.According to statistics, more than 50% oil-gas reservoir in the whole world is Carbonate Reservoir.Carbonate rock fractured cave type reservoir reservoir space is mainly even solution cavity of hole, corrosion hole.A kind of with for the conventional sandstone reservoir of micron order intergranular or intragranular pore or microcrack with respect to only having, seam hole type reservoir be a kind ofly have that porosity type is various, pore scale large (grade and even Centimeter Level) oily porous media.It is low that such reservoir waterflooding water drive involves degree, and after water drive, oil water relation is further complicated, and remaining oil distribution pattern is variation.Seam hole type oil reservoir remaining oil micro Distribution rule, genesis mechanism and controlled factordisease become water flooding regime optimization, waterflood project adjustment and improve the bottleneck that seam hole type reservoir water drive recovery ratio is needed breakthrough badly.
At present, the laboratory experiment method of research remaining oil micro Distribution rule mainly contains core analysis, microphysics model and three kinds of methods of flat plate model.Wherein, core analysis, microphysics model belong to microphysics experiment, and flat plate model experiment belongs to macroscopical Physical Experiment.Core analysis technology is the method that application oil-containing sheet is determined remaining oil saturation, and the method can be carried out water flooding degree and remaining oil saturation evaluation to core hole region.But the method displacement process is not visible, cannot carry out data acquisition and graphical analysis and image and process, can not to the problem occurring in experimentation and experimental data, make and judge accurately and process to quicklook.Microphysics model is the microcosmic oil drive mechanism that the microcosmic oil drive on the emulation glass model based on light-chemical etching tests to study water drive oil, and the image of experimentation can calculate result by image analysis system input computer.But owing to adopting light-chemical etching fabrication techniques, its cost of manufacture and producing device are had relatively high expectations, and this class model is generally two dimensional surface form, cannot study vertical upper Remaining Oil Distribution; Simultaneously, solid skeletal is the materials such as glass plate, the macroscopical flat plate model that causes model Petrographic Features, wetability feature and moulded dimension and actual rock to be made differs larger, cannot show exactly water drive process and Remaining Oil Distribution on larger area reservoir model.
The process that application back-up sand method making flat plate model is simulated displacement of reservoir oil by filling water is a kind of experimental study means that generally adopt in current macroscopical physics displacement test.The method has that modelling cost is lower, and moulded dimension is relatively large, can reflect the advantage of plane and vertical upper displacement of reservoir oil by filling water process and remaining oil distributed in three dimensions rule.But the many oil production by the metering port of export of current experimental system are calculated oil displacement efficiency, or rely on the variation that is arranged in the electrode measurement resistivity on model, the variation of oil saturation in indirect reaction model, for researcher, its whole displacement process cannot be realized visual, and cannot quantitative assessment water drive occurrence status and the controlled factordisease of remaining oil in hole, dissolution pore later, restricted flat plate model seam hole type reservoir waterflooding extraction microscopic remaining oil distribution rule detect and Enrichment Mode research in application.
Summary of the invention
For overcoming defect of the prior art, the invention provides a kind of experiment detecting system and method for stitching hole type reservoir remaining oil distribution, for the laboratory of seam hole type reservoir three dimensions water drive oil migration rule and remaining oil distribution, detect a kind of new system and method is provided.
For achieving the above object, the present invention adopts following proposal:
A kind of experiment detecting system that stitches hole type reservoir remaining oil distribution, comprise: constant-flux pump, containing the container of formation water, containing the container of composite crude oil, containing container, cross valve, seam hole type reservoir flat plate model, core holding unit, x-ray tomography scanning system, data processing and the imaging system of contrast medium, is characterized in that:
In constant-flux pump, be full of distilled water and produce stable pressure driving container containing formation water, containing the container of composite crude oil with containing the fluid in the container of contrast medium as displacing medium;
Cross valve has three entrances and an outlet, containing the container of formation water, containing the container of composite crude oil, be connected with three entrances of cross valve by the first pipeline, the second pipeline, the 3rd pipeline respectively containing the container of contrast medium;
The outlet of cross valve connects the inlet of core holding unit by pumping into pipeline, containing the container of formation water, the container that contains composite crude oil, the fluid containing in the container of contrast medium, from the inlet of core holding unit, enter, through rock core plug, enter seam hole type reservoir flat plate model, then the rock core plug that passes through to produce exit is by output mouth output, the manufacturing process of simulation producing well, institute's output liquid is collected in graduated cylinder;
X-ray tomography scanning system comprises X-ray tube and probe;
Seam hole type flat plate model and core holding unit integral body are placed between the X-ray tube and probe of x-ray tomography scanning system, the probe of x-ray tomography scanning system is connected with data processing and imaging system by data line, 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.
Further, constant-flux pump by pipeline Fen San road respectively through the first valve, the second valve, the 3rd valve and containing the container of formation water, be connected with the container containing contrast medium containing the container of composite crude oil.
Further, the described contrast medium containing filling in the container of contrast medium is iodized oil contrast medium, and iodized oil contrast medium is the bonding agent of poppy seed oil and iodine, and what iodized oil contrasted is 40% containing iodine concentration.
Further, pump into pipeline and be provided with the 4th valve.
Further, core holding unit is hollow cuboid, and core holding unit comprises front capping, rear seal-cover, left sealing cap, right aling cap, upper cover, lower capping, between six cappings of core holding unit, is tightly connected; Left sealing cap, right aling cap at core holding unit are established respectively inlet and output mouth, and upper cover arranges hydraulic pressure outlet, and lower capping arranges hydraulic pressure entrance.
Further, at rock core, add and hold the left sealing cap of device, the inner side of right aling cap is equipped with the rock core plug of hollow; Rock core plug is shaped as annular cuboid, and cavity is rectangle, and the size size horizontal with rock core is corresponding consistent.
Further, cartridge is hollow cuboid, left and right uncovered, and the liquid being entered by hydraulic pressure entrance can pressurize to four faces in the upper and lower front and back of cartridge; Seam hole type reservoir flat plate model is set in cartridge;
Between rock core plug inner side and cartridge, be provided with seal gasket and seal, seal gasket shape is annular rectangular shape, and cavity size is consistent with rock core correspondingly-sized; Rock core plug will stitch the dull and stereotyped rock core of hole type reservoir by seal gasket and compress.
Further, between rock core plug and core holding unit, pass through rock core plug elastic mounting, sealing, centered by described rock core plug rubber cushion, position is drilled with the cuboid seal gasket of a circular hole, and by middle part circular hole, the inlet of core holding unit is connected with upstream line.The outside length and width size of rock core plug rubber cushion and rock core plug, core holding unit lateral cross section inside dimension are consistent.
Further, core holding unit upper cover and lower capping left and right end portions are parallel is provided with bolt, and the external screw thread of bolt is connected cooperation with the internal thread of rock core plug; Core holding unit upper cover is connected and fixes with rock core plug by connecting bolt with lower capping, and the one that realizes the dull and stereotyped rock core of core holding unit, rock core plug and hole type reservoir is fixed-type; The rubber tube that the hydraulic pressure entrance of the pipeline of hydraulic conveyor by core holding unit adds to rock core the sealing seam hole type reservoir flat plate model of holding in device pressurizes, and can simulate Different Strata stress level; Rock core adds the hydraulic pressure exit of holding device and is provided with the 5th valve, by the switch of the 5th valve, can realize the ring of opposite joint hole type reservoir flat plate model and press regulation and control.
Stitch an experiment detection method for hole type reservoir remaining oil distribution, apply the experiment detecting system of above-mentioned seam hole type reservoir remaining oil distribution, step is as follows:
Step 1: adopt the seam hole type rock sample with hole and corrosion hole that is taken from surface occurence district to cut, polish according to the demand of research size, prepare seam hole type reservoir flat plate model;
Step 2: will stitch hole type flat plate model and clean, and rock sample be 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 the seam hole type flat plate model of known quality is inserted to add and held device, and then connect the pipeline vacuumizing, close the 4th valve, find time 2～8 hours, open the first valve and the 4th valve, start constant-flux pump, with the flow velocity of 0.01ml/min, saturation water is pumped into seam hole type flat plate model through inlet in core holding unit, make flat plate model fully saturated by water;
Step 4: close the first valve, the inlet of core holding unit is opened, open the second valve, the 3rd valve simultaneously, start constant-flux pump, 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 into seam hole type flat plate model, regulate the force value of the hydraulic conveyor of core holding unit, simulated formation pressure, the water yield that simultaneously measures the core holding unit output mouth of core holding unit is saturated oil mass, observe graduated cylinder and displace the water yield while no longer increasing, close constant-flux pump;
Step 5: open x-ray tomography system ray tube opposite joint hole type flat plate model and scan, by connecting signal data line input data processing and the imaging system of probe, demonstration is dissolved with contrast medium crude oil original oil-containing distribution situation in the type reservoir flat plate model of seam hole;
Step 6: start model internal construction scanning system, valve-off the second valve and the 3rd valve, open the first 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 the data line of connection probe, will see through photosignal input data processing and the imaging system of seam hole type reservoir flat plate model, the oil migration process that in the type flat plate model internal void of demonstration seam hole, water drive contains contrast medium in real time and the variation of remaining oil distribution situation; The liquid of the output in the core holding unit output mouth of graduated cylinder collection core holding unit, because profit does not dissolve each other, in graduated cylinder, present the lower water distribution situation that oils, by cylinder scale, measure respectively the volume of oil, water in production fluid volume, moisture while reaching 98% in graduated cylinder, close constant-flux pump, calculate graduated cylinder cumulative oil production
Step 7: 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, can opposite joint hole type reservoir flat plate model water drive oil process carry out visual, simultaneously, in conjunction with the port of export by displacement, gone out crude quality, realize opposite joint hole type reservoir the water drive later quantitatively characterizing of inner Remaining Oil Distribution and the qualitative evaluation of origin mechanism.
With respect to prior art, beneficial effect of the present invention is as follows: owing to having adopted compared with large scale seam hole type reservoir flat plate model and having added ring pressure device to carry out simulating oil deposit pressure, adopt formation water displacement containing the composite crude oil of dissolved gas in oil, simulated really the water drive oil process under formation condition, its seepage flow mechanism and Remaining Oil Distribution are close with actual mining site water filling, and for mining site, application has larger directive significance to test result; Simultaneously, composite crude oil is dissolved with X ray contrast medium, by x-ray tomography system, displacement of reservoir oil by filling water overall process is carried out to real time scan and in imaging display system, realize visually, the displacement of reservoir oil by filling water process based on the true rock flat plate model of large scale at present that solved cannot realize a visual difficult problem.
Accompanying drawing explanation
Fig. 1 is the structural representation of the experiment detecting system of seam hole type reservoir remaining oil distribution;
Fig. 2 has to add seam hole type reservoir flat plate model core holding unit that ring presses 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 rock core plug left view;
Fig. 5 b is rock core plug sectional drawing;
Fig. 6 a is seal gasket left view;
Fig. 6 b is seal gasket sectional drawing;
Fig. 7 a is rock core plug rubber cushion left view;
Fig. 7 b is rock core plug rubber cushion sectional drawing;
In figure, 1, constant-flux pump, 2, the first valve, 3, the second valve, 4, the 3rd valve, 5, container containing formation water, 6, container containing composite crude oil, 7, container containing contrast medium, 8, cross valve, 9, the 4th valve, 10, seam hole type reservoir flat plate model, 11, graduated cylinder, 12, core holding unit, 13, X-ray tube, 14, probe, 15, data processing and imaging system, 16, core holding unit inlet, 17, core holding unit output mouth, 18, rock core plug, 19, cartridge, 20, hydraulic conveyor, 21, hydraulic pressure entrance, 22, hydraulic pressure outlet, 23, the 5th valve, 24, seal gasket, 25, rock core plug rubber cushion, 26, bolt, 27, pressure meter.
The specific embodiment
As shown in Figure 1, the experiment detecting system of seam hole type reservoir remaining oil distribution, comprise: constant-flux pump 1, the container 5 containing formation water, the container 6 containing composite crude oil, the container 7 that contains contrast medium, cross valve 8, seam hole type reservoir flat plate model 10, core holding unit 12, x-ray tomography scanning system, data processing and imaging system 15, x-ray tomography scanning system comprises X-ray tube 13 and probe 14.
Constant-flux pump 1 by pipeline Fen San road respectively through the first valve 2, the second valve 3, the 3rd valve 4 and containing the container 5 of formation water, be connected with the container 7 containing contrast medium containing the container 6 of composite crude oil; In constant-flux pump, be full of distilled water and produce stable pressure driving container 5 containing formation water, containing the container 6 of composite crude oil with containing the fluid in the container 7 of contrast medium as displacing medium.By controlling the switch of the first valve 2, the second valve 3, the 3rd valve 4, the fluid in constant-flux pump 1 optionally can be pumped into container 5 containing formation water, containing the container 6 of composite crude oil, containing the container 7 of contrast medium.
The described contrast medium containing filling in the container 7 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.
Cross valve 8 has three entrances and an outlet, containing the container 5 of formation water, containing the container 6 of composite crude oil, be connected with three entrances of cross valve 8 by the first pipeline, the second pipeline, the 3rd pipeline respectively containing the container 7 of contrast medium.
As shown in Figure 2, core holding unit is hollow cuboid, and core holding unit 12 comprises front capping, rear seal-cover, left sealing cap, right aling cap, upper cover, lower capping (in this article, left and right refers to laterally, paper inward-outward direction refers to longitudinally, lower same).Between six cappings of core holding unit, be tightly connected; Left sealing cap, right aling cap at core holding unit 12 are established respectively inlet 16 and output mouth 17, and upper cover arranges hydraulic pressure outlet 22, and lower capping arranges hydraulic pressure entrance 21.
At rock core, add and hold the left sealing cap of device 12, the inner side of right aling cap is equipped with the rock core plug 18 of hollow.As shown in Figure 5, rock core plug 18 is shaped as annular cuboid, and cavity is rectangle, and size is corresponding consistent longitudinally with rock core for size.
Between rock core plug 18 inner sides and cartridge 19, be provided with seal gasket 24 and seal, as shown in Figure 6, seal gasket 24 shapes are annular rectangular shapes, and cavity size is consistent with rock core correspondingly-sized.Rock core plug 18 will stitch the dull and stereotyped rock core 10 of hole type reservoir by seal gasket 24 and compress.
, sealing fixing by rock core plug rubber cushion 25 between rock core plug 18 and core holding unit 12.As shown in Figure 7, centered by described rock core plug rubber cushion 25, position is drilled with the cuboid seal gasket of a circular hole, and by middle part circular hole, the inlet 16 of core holding unit 12 is connected with upstream line.The outside length and width size of rock core plug rubber cushion 25 and rock core plug 18, core holding unit 12 longitudinal cross-section inside dimensions are consistent, can guarantee fluid by time realize sealing.
The rubber tube 19 that the pipeline of hydraulic conveyor 20 21 pairs of rock cores of hydraulic pressure entrance by core holding unit 12 add the sealing seam hole type reservoir flat plate model 10 of holding in device 12 pressurizes, by pressure meter 27, can show different pressures value, thus simulation Different Strata stress level.Rock core adds the hydraulic pressure of holding device 12 and exports 22 places and be provided with the 5th valve 23, by the switch of the 5th valve 23, can realize the ring of opposite joint hole type reservoir flat plate model 10 and press regulation and control.
The outlet of cross valve 8 connects the inlet 16 of core holding unit 12 by pumping into pipeline, pump into pipeline and be provided with the 4th valve 9, the 4th valve 9 can be closed pipeline, prevents that the container 5 containing formation water, the container 6 that contains composite crude oil, the fluid containing in the container 7 of contrast medium from entering seam hole type reservoir flat plate model 10 when model vacuumizes under differential pressure action.Four switches by cross valve 8 can guarantee container 5 containing formation water, containing the container 6 of composite crude oil, enter respectively seam hole type reservoir flat plate model 10 containing container 7 fluid of containing of contrast medium, and prevent that fluid is at the container 5 containing formation water, containing the container 6 of composite crude oil, containing mutual channelling between the container 7 of contrast medium.Containing the container 5 of formation water, the container 6 that contains composite crude oil, the fluid containing in the container 7 of contrast medium, from the inlet 16 of core holding unit 12, enter, through rock core plug 18, enter seam hole type reservoir flat plate model 10, then the rock core plug 18 that passes through output mouth 17 places is by output mouth 17 outputs, the manufacturing process of simulation producing well, institute's output liquid is collected in graduated cylinder 11.
Seam hole type flat plate model 10 and core holding unit 12 integral body are placed between the X-ray tube 13 and probe 14 of x-ray tomography scanning system, and experiment is carried out in process, open scanning system, the fluid distribution in real time record seam hole type flat plate model 10.
The probe 14 of x-ray tomography scanning system is connected with data processing and imaging system 15 by data line, and the photosignal of scanning is transferred to data processing and imaging system 15, and the whole process of water drive oil is recorded and imaging demonstration.
Stitch the detection method of remaining oil micro Distribution rule in the type reservoir displacement in flooding process of hole, apply the experiment detecting system of above-mentioned seam hole type reservoir remaining oil distribution, step is as follows:
Step 1: adopt the seam hole type rock sample with hole and corrosion hole that is taken from surface occurence district to cut, polish according to the demand of research size, prepare seam hole type reservoir flat plate model;
Step 2: will stitch hole type flat plate model and clean, and rock sample be 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 the seam hole type flat plate model 10 of known quality is inserted to add and held device 12, and then connect the pipeline vacuumizing, close the 4th valve 9, find time 2～8 hours, open the first valve 2 and the 4th valve 9, start constant-flux pump 1, with the flow velocity of 0.01ml/min, saturation water is pumped into seam hole type flat plate model 10 through inlet in core holding unit 12, make flat plate model fully saturated by water;
Step 4: close the first valve, the inlet of core holding unit 12 is opened, open the second valve 3, the 3rd valve 4 simultaneously, start constant-flux pump 1, composite crude oil containing in the container 6 of composite crude oil and the contrast medium fluid-mixing that contains the container 7 of contrast medium are pumped into seam hole type flat plate model 10, regulate the force value of the hydraulic conveyor 20 of core holding unit 12, simulated formation pressure, the water yield that simultaneously measures the core holding unit output mouth 17 of core holding unit 12 is saturated oil mass, observe graduated cylinder 11 and displace the water yield while no longer increasing, close constant-flux pump 1.
Step 5: open x-ray tomography system ray tube 13 opposite joint hole type flat plate models 10 and scan, by connecting signal data line input data processing and the imaging system 15 of probe 14, demonstration is dissolved with contrast medium crude oil original oil-containing distribution situation in the type reservoir flat plate model 10 of seam hole.
Step 6: start model internal construction scanning system, valve-off the second valve 3 and the 3rd valve 4, open the first valve 2, start constant-flux pump 1, carry out displacement of reservoir oil by filling water experiment, the X-ray tube 13 of scanning system produces ray scanning flat plate model 10, by the data line of connection probe 14, will see through photosignal input data processing and the imaging system 15 of seam hole type reservoir flat plate model 10, the oil migration process that in type flat plate model 10 internal voids of demonstration seam hole, water drive contains contrast medium in real time and the variation of remaining oil distribution situation.The liquid of the output in the core holding unit output mouth 17 of graduated cylinder 11 collection core holding units 12, because profit does not dissolve each other, in graduated cylinder 11, present the lower water distribution situation that oils, by graduated cylinder 11 scales, measure respectively the volume of oil, water in production fluid volume, moisture while reaching 98% in graduated cylinder 11, close constant-flux pump 1, calculate graduated cylinder 11 cumulative oil productions.
Step 7: 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 15, can opposite joint hole type reservoir flat plate model 10 water drive oil processes carry out visual, simultaneously, in conjunction with the port of export by displacement, gone out crude quality, realize opposite joint hole type reservoir the water drive later quantitatively characterizing of inner Remaining Oil Distribution and the qualitative evaluation of origin mechanism.
Claims (10)
1. an experiment detecting system that stitches hole type reservoir remaining oil distribution, comprise: constant-flux pump, containing the container of formation water, containing the container of composite crude oil, containing container, cross valve, seam hole type reservoir flat plate model, core holding unit, x-ray tomography scanning system, data processing and the imaging system of contrast medium, is characterized in that:
In constant-flux pump, be full of distilled water and produce stable pressure driving container containing formation water, containing the container of composite crude oil with containing the fluid in the container of contrast medium as displacing medium;
Cross valve has three entrances and an outlet, containing the container of formation water, containing the container of composite crude oil, be connected with three entrances of cross valve by the first pipeline, the second pipeline, the 3rd pipeline respectively containing the container of contrast medium;
The outlet of cross valve connects the inlet of core holding unit by pumping into pipeline, containing the container of formation water, the container that contains composite crude oil, the fluid containing in the container of contrast medium, from the inlet of core holding unit, enter, through rock core plug, enter seam hole type reservoir flat plate model, then the rock core plug that passes through to produce exit is by output mouth output, the manufacturing process of simulation producing well, institute's output liquid is collected in graduated cylinder;
X-ray tomography scanning system comprises X-ray tube and probe;
Seam hole type flat plate model and core holding unit integral body are placed between the X-ray tube and probe of x-ray tomography scanning system, the probe of x-ray tomography scanning system is connected with data processing and imaging system by data line, 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.
2. the experiment detecting system of seam according to claim 1 hole type reservoir remaining oil distribution, it is characterized in that, constant-flux pump by pipeline Fen San road respectively through the first valve, the second valve, the 3rd valve and containing the container of formation water, be connected with the container containing contrast medium containing the container of composite crude oil.
3. according to the experiment detecting system of the seam hole type reservoir remaining oil distribution described in claim 1-2, it is characterized in that, the described contrast medium containing filling in the container of contrast medium is iodized oil contrast medium, iodized oil contrast medium is the bonding agent of poppy seed oil and iodine, and what iodized oil contrasted is 40% containing iodine concentration.
4. according to the experiment detecting system of the seam hole type reservoir remaining oil distribution described in claim 1-3, it is characterized in that, pump into pipeline and be provided with the 4th valve.
5. according to the experiment detecting system of the seam hole type reservoir remaining oil distribution described in claim 1-4, it is characterized in that, core holding unit is hollow cuboid, core holding unit comprises front capping, rear seal-cover, left sealing cap, right aling cap, upper cover, lower capping, between six cappings of core holding unit, is tightly connected; Left sealing cap, right aling cap at core holding unit are established respectively inlet and output mouth, and upper cover arranges hydraulic pressure outlet, and lower capping arranges hydraulic pressure entrance.
6. according to the experiment detecting system of the seam hole type reservoir remaining oil distribution described in claim 1-5, it is characterized in that, at rock core, add and hold the left sealing cap of device, the inner side of right aling cap is equipped with the rock core plug of hollow; Rock core plug is shaped as annular cuboid, and cavity is rectangle, and the size size horizontal with rock core is corresponding consistent.
7. according to the experiment detecting system of the seam hole type reservoir remaining oil distribution described in claim 1-6, it is characterized in that, cartridge is hollow cuboid, left and right uncovered, and the liquid being entered by hydraulic pressure entrance can pressurize to four faces in the upper and lower front and back of cartridge; Seam hole type reservoir flat plate model is set in cartridge;
Between rock core plug inner side and cartridge, be provided with seal gasket and seal, seal gasket shape is annular rectangular shape, and cavity size is consistent with rock core correspondingly-sized; Rock core plug will stitch the dull and stereotyped rock core of hole type reservoir by seal gasket and compress.
8. according to the experiment detecting system of the seam hole type reservoir remaining oil distribution described in claim 1-7, it is characterized in that, between rock core plug and core holding unit, pass through rock core plug elastic mounting, sealing, centered by described rock core plug rubber cushion, position is drilled with the cuboid seal gasket of a circular hole, by middle part circular hole, the inlet of core holding unit is connected with upstream line.The outside length and width size of rock core plug rubber cushion and rock core plug, core holding unit lateral cross section inside dimension are consistent.
9. according to the experiment detecting system of the seam hole type reservoir remaining oil distribution described in claim 1-8, it is characterized in that, core holding unit upper cover and lower capping left and right end portions are parallel is provided with bolt, and the external screw thread of bolt is connected cooperation with the internal thread of rock core plug; Core holding unit upper cover is connected and fixes with rock core plug by connecting bolt with lower capping, and the one that realizes the dull and stereotyped rock core of core holding unit, rock core plug and hole type reservoir is fixed-type; The rubber tube that the hydraulic pressure entrance of the pipeline of hydraulic conveyor by core holding unit adds to rock core the sealing seam hole type reservoir flat plate model of holding in device pressurizes, and can simulate Different Strata stress level; Rock core adds the hydraulic pressure exit of holding device and is provided with the 5th valve, by the switch of the 5th valve, can realize the ring of opposite joint hole type reservoir flat plate model and press regulation and control.
10. stitch an experiment detection method for hole type reservoir remaining oil distribution, application rights requires the experiment detecting system of 1-9 seam hole type reservoir remaining oil distribution, and step is as follows:
Step 1: adopt the seam hole type rock sample with hole and corrosion hole that is taken from surface occurence district to cut, polish according to the demand of research size, prepare seam hole type reservoir flat plate model;
Step 2: will stitch hole type flat plate model and clean, and rock sample be 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 the seam hole type flat plate model of known quality is inserted to add and held device, and then connect the pipeline vacuumizing, close the 4th valve, find time 2～8 hours, open the first valve and the 4th valve, start constant-flux pump, with the flow velocity of 0.01ml/min, saturation water is pumped into seam hole type flat plate model through inlet in core holding unit, make flat plate model fully saturated by water;
Step 4: close the first valve, the inlet of core holding unit is opened, open the second valve, the 3rd valve simultaneously, start constant-flux pump, 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 into seam hole type flat plate model, regulate the force value of the hydraulic conveyor of core holding unit, simulated formation pressure, the water yield that simultaneously measures the core holding unit output mouth of core holding unit is saturated oil mass, observe graduated cylinder and displace the water yield while no longer increasing, close constant-flux pump;
Step 5: open x-ray tomography system ray tube opposite joint hole type flat plate model and scan, by connecting signal data line input data processing and the imaging system of probe, demonstration is dissolved with contrast medium crude oil original oil-containing distribution situation in the type reservoir flat plate model of seam hole;
Step 6: start model internal construction scanning system, valve-off the second valve and the 3rd valve, open the first 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 the data line of connection probe, will see through photosignal input data processing and the imaging system of seam hole type reservoir flat plate model, the oil migration process that in the type flat plate model internal void of demonstration seam hole, water drive contains contrast medium in real time and the variation of remaining oil distribution situation; The liquid of the output in the core holding unit output mouth of graduated cylinder collection core holding unit, because profit does not dissolve each other, in graduated cylinder, present the lower water distribution situation that oils, by cylinder scale, measure respectively the volume of oil, water in production fluid volume, moisture while reaching 98% in graduated cylinder, close constant-flux pump, calculate graduated cylinder cumulative oil production
Step 7: 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, can opposite joint hole type reservoir flat plate model water drive oil process carry out visual, simultaneously, in conjunction with the port of export by displacement, gone out crude quality, realize opposite joint hole type reservoir the water drive later quantitatively characterizing of inner Remaining Oil Distribution and the qualitative evaluation of origin mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310585823.0A CN103556994B (en) | 2013-11-19 | 2013-11-19 | The experiment detecting system of fractured-vuggy reservoir remaining oil distribution and detection method |
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| CN201310585823.0A CN103556994B (en) | 2013-11-19 | 2013-11-19 | The experiment detecting system of fractured-vuggy reservoir remaining oil distribution and detection method |
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| CN103556994A true CN103556994A (en) | 2014-02-05 |
| CN103556994B CN103556994B (en) | 2016-11-23 |
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