CN104730089B - Flow in parallel core foam fractionation imaging detection device and method of work thereof - Google Patents
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Abstract
The present invention relates in a kind of parallel core the foam fractionation imaging detection device that flows, comprise foam injection systems, parallel core displacement system, pressure-measuring system, computing machine and tomography apparatus.Foam injection systems is for providing the fluid condition of foam mold draft experiment; Parallel core displacement system is for simulating the flow event of foam in porous medium; Pressure-measuring system is for monitoring the pressure change in liquid foams drainage process; Tomography apparatus is for realizing the collection of froth images in liquid foams drainage process.The present invention can the measurement of gas phase saturation and gas phase shunt volume in complete independently different permeability rock core foam flow process; The present invention is practical, gas phase saturation is obtained by tomography scan image segmentation and three-dimensional reconstruction, gas phase shunt volume is obtained, for the migration rule of research foam in porous medium provides technical support, for describing the distribution situation of gas saturation in rock core by gas-liquid separation.
Description
Technical field
The present invention relates in parallel core flow foam fractionation imaging detection device and method of work thereof, belong to technical field of petrochemical industry.
Background technology
Because foam has higher apparent viscosity in the earth formation, meet oily froth breaking, chance water is stablized, at the position that water saturation is higher, there is higher filtrational resistance, effective shutoff can be carried out to most permeable zone, the displacement intensity at hyposmosis position in effectively increasing, aerated fluid is able to widespread use in oil-gas mining.
The gas phase saturation of foam and gas phase shunt volume are two important parameters of characterization of foam profile modification, and what the size of their values all reflected gas in rock core retains situation.The difference of different permeability rock core gas phase saturation and gas phase shunt volume size, reflects the difference of foam to the different permeability rock core mechanism of action.
At present, measurement mechanism and the method for existing parallel core gas phase saturation and gas phase shunt volume have following limitation: one is, have the apparatus and method measuring gas phase saturation and gas phase shunt volume respectively, but can not measure this two parameters simultaneously; Two are, generally can only obtain the average gas phase saturation of rock core, can not describe the distribution of its gas phase saturation in rock core to the measurement of gas phase saturation.
Summary of the invention
For the deficiencies in the prior art, the invention discloses in parallel core the foam fractionation imaging detection device that flows;
The invention also discloses the method for work of said apparatus;
The present invention utilizes gas and the large feature of fluid density difference, the segmentation of laminated imaging device combining image and three-dimensional rebuilding method is adopted to obtain gas phase saturation, gas phase shunt volume is obtained by gas-liquid separation, measure while achieving gas phase saturation distribution and gas phase shunt volume, for the migration rule of research foam in porous medium provides technical support.
Terminological interpretation:
1. gas phase saturation: the ratio referring to contained gas volume and rock pore volume in rock core.
2. gas phase shunt volume: refer to that foam is in parallel core flow process, height ooze rock core, in ooze the gas volume that rock core and low permeability cores export.
Gas phase saturation and gas phase shunt volume reflect the resident situation of gas in different permeability rock core.
Technical scheme of the present invention is:
Flow in parallel core foam fractionation imaging detection device, described device comprises foam injection systems, parallel core displacement system, pressure-measuring system, computing machine and tomography apparatus, described foam injection systems connects described parallel core displacement system, described pressure-measuring system connects described computing machine, and described parallel core displacement system is fixedly installed on described tomography apparatus;
Described foam injection systems comprises gas cylinder, gas quality flow rate controller and frothing agent source, and described gas cylinder connects described gas quality flow rate controller, and described gas quality flow rate controller connects described frothing agent source;
Described parallel core displacement system comprises water source, stratum, basket one, basket two, basket three, check valve one, check valve two, check valve three, wobble pump, produced fluid measuring apparatus one, produced fluid measuring apparatus two, produced fluid measuring apparatus three, gasometer one, gasometer two, gasometer three, wide-necked bottle one, wide-necked bottle two, wide-necked bottle three, described basket one, described basket two, described basket three is connected in parallel, and water source, described stratum connects described basket one, described basket two, the entrance of described basket three, described basket one, described check valve one, described produced fluid measuring apparatus one, described gasometer one, described wide-necked bottle one connects successively, described basket two, described check valve two, described produced fluid measuring apparatus two, described gasometer two, described wide-necked bottle two connects successively, described basket three, described check valve three, described produced fluid measuring apparatus three, described gasometer three, described wide-necked bottle three connects successively,
Described measuring system comprises pressure transducer and tensimeter, and described tensimeter is arranged on the endpiece of described basket one, described basket two, described basket three, and described tensimeter connects described wobble pump;
Described frothing agent source is used for providing frothing agent for described basket one, described basket two, described basket three; Water source, described stratum provides local water for described basket one, described basket two, described basket three; Described pressure transducer is for monitoring the pressure of inlet end of described basket one, described basket two, described basket three; Described tensimeter is for monitoring the pressure of endpiece of described basket one, described basket two, described basket three.
Described check valve one, described check valve two and described check valve three is by described wobble pump controlled pressure.
Preferred according to the present invention, described frothing agent source comprises the intermediate receptacle and constant-flux pump that hold frothing agent, connect described constant-flux pump bottom the described intermediate receptacle holding frothing agent, described in hold frothing agent intermediate receptacle endpiece connect described gas quality flow rate controller; Water source, described stratum comprises the intermediate receptacle and described constant-flux pump that hold local water, described in hold local water intermediate receptacle bottom connect described constant-flux pump; Described gas quality flow rate controller and described in hold the intermediate receptacle of frothing agent endpiece connect the entrance of described parallel core displacement system respectively by six-way valve.
Preferred according to the present invention, described basket one, described basket two, described basket three are connected in parallel by measuring point.
Described basket one, described basket two, described basket three are for simulating layer cross flow.
The method of work of above-mentioned detection device, concrete steps comprise:
(1) simulation stratum condition, select the silica sand of different-grain diameter to fill and present described basket one, described basket two and described basket three respectively, and gas surveys the permeability of described basket one, described basket two and described basket three respectively;
(2) respectively the described basket one processed through step (1), described basket two and described basket three are vacuumized;
(3) by water source, stratum respectively to the described basket one processed through step (2), described basket two and the saturated local water of described basket three, the volume of described basket one, described basket two and the saturated local water of described basket three is the volume of voids of described basket one, described basket two and described basket three, and the volume of voids sum of described basket one, described basket two and described basket three is 1pv;
(4) control described wobble pump, regulate described check valve one, described check valve two and described check valve three to simulated formation pressure;
(5) described gas quality flow rate controller is regulated, by basket one described in the gas inject in described gas cylinder, described basket two and described basket three, by described frothing agent source, frothing agent is injected described basket one, described basket two and described basket three, gas and frothing agent are respectively at described basket one, described basket two and described basket three mix generation foam, starting to inject frothing agent to stopping injecting in the frothing agent time period, by the not described basket one in the same time that described pressure transducer real time record detects, described basket two, the inlet port pressure of described basket three, starting to inject frothing agent to stopping injecting in the frothing agent time period, real time record is by described gasometer one, the not described basket one in the same time that described gasometer two and described gasometer three detect respectively, described basket two, the endpiece gaseous phase volume of described basket three, calculate difference and the ratio of mistiming of adjacent moment gaseous phase volume, be gas phase shunt volume, starting to inject frothing agent to stopping injecting in the frothing agent time period, to not in the same time described basket one, described basket two, described basket three carry out tomography scanning, obtain its scan image,
(6) scan image that step (5) obtains is converted into gray-scale map;
(7) gray-scale map that step (6) obtains is carried out scanning, splitting;
(8) core model 3-D data volume is set up.
Preferred according to the present invention, vacuumize 3 ~ 4 hours to the described basket one processed through step (1), described basket two and described basket three by vacuum machine, described vacuum machine negative pressure is 0.1MPa.
Preferred according to the present invention, in step (3), by constant-flux pump, the described local water held in the intermediate receptacle of local water is pumped into described basket one, described basket two and described basket three.
Preferred according to the present invention, in step (5), by constant-flux pump, the described frothing agent held in the intermediate receptacle of frothing agent is pumped into described basket one, described basket two and described basket three.
Preferred according to the present invention, in step (5), frothing agent pumps into the speed of described basket one, described basket two and described basket three for (0.5 ~ 3) ml/min; Gas and frothing agent mix at described basket one, described basket two and described basket three respectively, and mixed volume ratio is (0.3:1) ~ (3:1); Gas and frothing agent mix at described basket one, described basket two and described basket three respectively and produce foam, and the cumulative volume producing foam is (0.2 ~ 5) PV.
Preferred according to the present invention, described the scan image that step (5) obtains is converted into gray-scale map, refer to: setting contrast is carried out, except hot-tempered pre-service to scan image step (5) obtained, strengthen the contrast of hole and matrix, by the experiment stain in hot-tempered removal image, scan image is converted into only containing the gray-scale map of brightness.
Preferred according to the present invention, described scan image segmentation, refer to: adopt indicator Kriging method to carry out binary conversion treatment to the gray-scale map that step (6) obtains, distinguish hole and matrix, again adopt indicator Kriging method to carry out binary conversion treatment to hole, gas phase and liquid phase region are separated.
Wherein, described indicator Kriging method is existing method, specifically can see list of references: A.N.Houston; W.Otten; P.C.Baveye; S.Hapca.Adaptive-windowindicatorkriging:Athresholdingmet hodforcomputedtomographyimagesofporousmedia.Computers & Geosciences, 54 (1): 239-248).
Preferred according to the present invention, describedly set up core model 3-D data volume, refer to: the gray-scale map after step (7) scanning, segmentation is superposed, form 3 d data field, obtain the three-dimensional reconstruction result of model pore space, add up gray-scale value that gas phase is not corresponding in the same time, obtain not gas phase saturation in the same time.
Beneficial effect of the present invention is:
1, utilize device of the present invention can the measurement of gas phase saturation and gas phase shunt volume in complete independently different permeability rock core foam flow process;
2, the present invention is practical, gas phase saturation is obtained by tomography scan image segmentation and three-dimensional reconstruction, gas phase shunt volume is obtained, for the migration rule of research foam in porous medium provides technical support, for describing the distribution situation of gas saturation in rock core by gas-liquid separation.
Accompanying drawing explanation
Fig. 1 is the structural representation of measurement mechanism of the present invention;
Wherein, 1, gas cylinder; 2, gas quality flow rate controller; 3, the intermediate receptacle of frothing agent is held; 4, the intermediate receptacle of local water is held; 5, constant-flux pump; 6, computing machine; 7, six-way valve; 8, pressure transducer; 9, basket one; 10, basket two; 11, basket three; 12, tomography apparatus; 13, check valve one; 14, check valve two; 15, check valve three; 16, tensimeter; 17, wobble pump; 18, produced fluid measuring apparatus one; 19, produced fluid measuring apparatus two; 20, produced fluid measuring apparatus three; 21, gasometer one; 22, gasometer two; 23, gasometer three; 24, wide-necked bottle one; 25, wide-necked bottle two; 26, wide-necked bottle three; 27, measuring point.
Fig. 2 is the volume of foam is the 2PV moment scan the scan image obtained;
Fig. 3 is the image that in Fig. 2, annotate portions obtains after carrying out scan image segmentation;
Fig. 4 is for utilizing measuring method of the present invention, and the parallel core gas phase saturation of acquisition is with the change curve of foam injected slurry volume;
Fig. 5 is for utilizing measuring method of the present invention, and the parallel core gas phase shunt volume of acquisition is with the change curve of foam injected slurry volume.
Embodiment
Below in conjunction with Figure of description and embodiment, the present invention is further qualified, but is not limited thereto.
Embodiment 1
Flow in parallel core foam fractionation imaging detection device, described device comprises foam injection systems, parallel core displacement system, pressure-measuring system, computing machine 6 and tomography apparatus 12, described foam injection systems connects described parallel core displacement system, described pressure-measuring system connects described computing machine 6, and described parallel core displacement system is fixedly installed on described tomography apparatus 12;
Described foam injection systems comprises gas cylinder 1, gas quality flow rate controller 2 and frothing agent source, and described gas cylinder 1 connects described gas quality flow rate controller 2, and described gas quality flow rate controller 2 connects described frothing agent source;
Described parallel core displacement system comprises water source, stratum, basket 1, basket 2 10, basket 3 11, check valve 1, check valve 2 14, check valve 3 15, wobble pump 17, produced fluid measuring apparatus 1, produced fluid measuring apparatus 2 19, produced fluid measuring apparatus 3 20, gasometer 1, gasometer 2 22, gasometer 3 23, wide-necked bottle 1, wide-necked bottle 2 25, wide-necked bottle 3 26, described basket 1, described basket 2 10, described basket 3 11 is connected in parallel, and water source, described stratum connects described basket 1, described basket 2 10, the entrance of described basket 3 11, described basket 1, described check valve 1, described produced fluid measuring apparatus 1, described gasometer 1, described wide-necked bottle 1 connects successively, described basket 2 10, described check valve 2 14, described produced fluid measuring apparatus 2 19, described gasometer 2 22, described wide-necked bottle 2 25 connects successively, described basket 3 11, described check valve 3 15, described produced fluid measuring apparatus 3 20, described gasometer 3 23, described wide-necked bottle 3 26 connects successively,
Described measuring system comprises pressure transducer 8 and tensimeter 16, and described tensimeter 16 is arranged on the endpiece of described basket 1, described basket 2 10, described basket 3 11, and described tensimeter 16 connects described wobble pump 17;
Described frothing agent source is used for providing frothing agent for described basket 1, described basket 2 10, described basket 3 11; Water source, described stratum provides local water for described basket 1, described basket 2 10, described basket 3 11; Described pressure sensing 8 device is for monitoring the pressure of inlet end of described basket 1, described basket 2 10, described basket 3 11; Described tensimeter 16 is for monitoring the pressure of endpiece of described basket 1, described basket 2 10, described basket 3 11;
Described check valve 1, described check valve 2 14 and described check valve 3 15 is by described wobble pump 17 controlled pressure.
Embodiment 2
Pick-up unit according to embodiment 1, its difference is, described frothing agent source comprises the intermediate receptacle 3 and constant-flux pump 5 that hold frothing agent, connect described constant-flux pump 5 bottom the described intermediate receptacle 3 holding frothing agent, described in hold frothing agent intermediate receptacle 3 endpiece connect described gas quality flow rate controller 2; Water source, described stratum comprises the intermediate receptacle 4 and described constant-flux pump 5 that hold local water, described in hold local water intermediate receptacle 4 bottom connect described constant-flux pump 5; Described gas quality flow rate controller 2 and described in hold the intermediate receptacle 3 of frothing agent endpiece connect the entrance of described parallel core displacement system respectively by six-way valve 7.
Described basket 1, described basket 2 10, described basket 11 3 are connected in parallel by measuring point 27.
Described basket 1, described basket 2 10, described basket 3 11 are for simulating layer cross flow.
As shown in Figure 1.
Embodiment 3
The method of work of pick-up unit according to embodiment 1 or 2, concrete steps comprise:
(1) simulation stratum condition, select the silica sand of different-grain diameter to fill and present described basket 1, described basket 2 10 and described basket 3 11 respectively, and gas survey the permeability of described basket 1, described basket 2 10 and described basket 3 11 respectively; Wherein, described basket 1 length 30cm, internal diameter 3.8cm, the length of described basket 2 10 and described basket 3 11 is identical with described basket 1 with internal diameter;
(2) respectively 3 ~ 4 hours are vacuumized to the described basket 1 processed through step (1), described basket 2 10 and described basket 3 11, wherein, described in vacuumize vacuum machine negative pressure used be 0.1MPa;
(3) by water source, stratum respectively to the described basket 1 processed through step (2), described basket 2 10 and the saturated local water of described basket 3 11, the volume according to saturated local water records: the volume of voids of described basket 1 is 108.8cm
3, factor of porosity is 0.32; The volume of voids of described basket 2 10 is 102.1cm
3, factor of porosity is 0.30; The volume of voids of described basket 3 11 is 95.3cm
3, factor of porosity is 0.28;
(4) control described wobble pump 17, regulate described check valve 1, described check valve 2 14 and described check valve 3 15 to simulated formation pressure 12.0MPa;
(5) described gas quality flow rate controller 2 is regulated, by basket 1 described in the gas inject in described gas cylinder 1, described basket 2 10 and described basket 3 11, by described frothing agent source, frothing agent is injected described basket 1 with the speed of 1.5ml/min, described basket 2 10 and described basket 3 11, gas and frothing agent are respectively at described basket 1, described basket 2 10 and described basket 3 11 mix generation foam, producing foam cumulative volume is 5PV, gas and frothing agent are respectively at described basket 1, described basket 2 10 and described basket 3 11 mix, the volume ratio of mixing is all 1:1, starting to inject frothing agent to stopping injecting in the frothing agent time period, by the not described basket 1 in the same time that described pressure transducer 8 real time record detects, described basket 2 10, the inlet port pressure of described basket 3 11, starting to inject frothing agent to stopping injecting in the frothing agent time period, real time record is by described gasometer 1, the not described basket 1 in the same time that described gasometer 2 22 and described gasometer 3 23 detect respectively, described basket 2 10, the endpiece gaseous phase volume of described basket 3 11, calculate difference and the ratio of mistiming of adjacent moment gaseous phase volume, be gas phase shunt volume, starting to inject frothing agent to stopping injecting in the frothing agent time period, to described basket 1, described basket 2 10, described basket 3 11 do not carry out tomography scanning in the same time, obtain its scan image, Fig. 2 is the volume of foam is the 2PV moment scan the scan image obtained,
(6) scan image that step (5) obtains is converted into gray-scale map; Specifically refer to: setting contrast is carried out to scan image step (5) obtained, except hot-tempered pre-service, strengthens the contrast of hole and matrix, by the experiment stain in hot-tempered removal image, scan image is converted into only containing the gray-scale map of brightness;
(7) gray-scale map that step (6) obtains is carried out scanning, splitting; Refer to: adopt indicator Kriging method to carry out binary conversion treatment to the gray-scale map that step (6) obtains, distinguish hole and matrix, again adopt indicator Kriging method to carry out binary conversion treatment to hole, gas phase and liquid phase region are separated.Fig. 3 is the image that in Fig. 2, annotate portions obtains after carrying out scan image segmentation.
Wherein, described indicator Kriging method is existing method, specifically can see list of references: A.N.Houston; W.Otten; P.C.Baveye; S.Hapca.Adaptive-windowindicatorkriging:Athresholdingmet hodforcomputedtomographyimagesofporousmedia.Computers & Geosciences, 54 (1): 239-248).
(8) core model 3-D data volume is set up, refer to: the gray-scale map after step (7) scanning, segmentation is superposed, form 3 d data field, obtain the three-dimensional reconstruction result of model pore space, add up gray-scale value that gas phase is not corresponding in the same time, obtain not gas phase saturation in the same time.
Wherein, Fig. 4 is for utilizing measuring method of the present invention, and the parallel core gas phase saturation of acquisition is with the change curve of foam injected slurry volume;
Fig. 5 is for utilizing measuring method of the present invention, and the parallel core gas phase shunt volume of acquisition is with the change curve of foam injected slurry volume.
As can be seen from Fig. 4, Fig. 5, after starting to inject frothing agent, the gas phase shunt volume of basket 1 (height oozes rock core) increases sharply, after foam injection is a certain amount of, basket 2 10 (in ooze rock core) and basket 3 11 (low permeability cores) shunt volume ascending velocity are accelerated, illustrate that the foam in basket 1 (height oozes rock core) serves stronger plugging action, shunting action is remarkable.
Claims (9)
1. flow in parallel core the method for work of foam fractionation imaging detection device, it is characterized in that, described device comprises foam injection systems, parallel core displacement system, pressure-measuring system, computing machine and tomography apparatus, described foam injection systems connects described parallel core displacement system, described pressure-measuring system connects described computing machine, and described parallel core displacement system is fixedly installed on described tomography apparatus;
Described foam injection systems comprises gas cylinder, gas quality flow rate controller and frothing agent source, and described gas cylinder connects described gas quality flow rate controller, and described gas quality flow rate controller connects described frothing agent source;
Described parallel core displacement system comprises water source, stratum, basket one, basket two, basket three, check valve one, check valve two, check valve three, wobble pump, produced fluid measuring apparatus one, produced fluid measuring apparatus two, produced fluid measuring apparatus three, gasometer one, gasometer two, gasometer three, wide-necked bottle one, wide-necked bottle two, wide-necked bottle three, described basket one, described basket two, described basket three is connected in parallel, and water source, described stratum connects described basket one, described basket two, the entrance of described basket three, described basket one, described check valve one, described produced fluid measuring apparatus one, described gasometer one, described wide-necked bottle one connects successively, described basket two, described check valve two, described produced fluid measuring apparatus two, described gasometer two, described wide-necked bottle two connects successively, described basket three, described check valve three, described produced fluid measuring apparatus three, described gasometer three, described wide-necked bottle three connects successively,
Described measuring system comprises pressure transducer and tensimeter, and described tensimeter is arranged on the endpiece of described basket one, described basket two, described basket three, and described tensimeter connects described wobble pump;
Described frothing agent source is used for providing frothing agent for described basket one, described basket two, described basket three; Water source, described stratum provides local water for described basket one, described basket two, described basket three; Described pressure transducer is for monitoring the pressure of inlet end of described basket one, described basket two, described basket three; Described tensimeter is for monitoring the pressure of endpiece of described basket one, described basket two, described basket three; Concrete steps comprise:
(1) simulation stratum condition, select the silica sand of different-grain diameter to fill and present described basket one, described basket two and described basket three respectively, and gas surveys the permeability of described basket one, described basket two and described basket three respectively;
(2) respectively the described basket one processed through step (1), described basket two and described basket three are vacuumized;
(3) by water source, stratum respectively to the described basket one processed through step (2), described basket two and the saturated local water of described basket three, the volume of described basket one, described basket two and the saturated local water of described basket three is the volume of voids of described basket one, described basket two and described basket three, and the volume of voids sum of described basket one, described basket two and described basket three is 1pv;
(4) control described wobble pump, regulate described check valve one, described check valve two and described check valve three to simulated formation pressure;
(5) described gas quality flow rate controller is regulated, by basket one described in the gas inject in described gas cylinder, described basket two and described basket three, by described frothing agent source, frothing agent is injected described basket one, described basket two and described basket three, gas and frothing agent are respectively at described basket one, described basket two and described basket three mix generation foam, starting to inject frothing agent to stopping injecting in the frothing agent time period, by the not described basket one in the same time that described pressure transducer real time record detects, described basket two, the inlet port pressure of described basket three, starting to inject frothing agent to stopping injecting in the frothing agent time period, real time record is by described gasometer one, the not described basket one in the same time that described gasometer two and described gasometer three detect respectively, described basket two, the endpiece gaseous phase volume of described basket three, calculate difference and the ratio of mistiming of adjacent moment gaseous phase volume, be gas phase shunt volume, starting to inject frothing agent to stopping injecting in the frothing agent time period, to not in the same time described basket one, described basket two, described basket three carry out tomography scanning, obtain its scan image,
(6) scan image that step (5) obtains is converted into gray-scale map;
(7) gray-scale map that step (6) obtains is carried out scanning, splitting;
(8) core model 3-D data volume is set up.
2. method of work according to claim 1, it is characterized in that, described frothing agent source comprises the intermediate receptacle and constant-flux pump that hold frothing agent, connect described constant-flux pump bottom the described intermediate receptacle holding frothing agent, described in hold frothing agent intermediate receptacle endpiece connect described gas quality flow rate controller; Water source, described stratum comprises the intermediate receptacle and described constant-flux pump that hold local water, described in hold local water intermediate receptacle bottom connect described constant-flux pump; Described gas quality flow rate controller and described in hold the intermediate receptacle of frothing agent endpiece connect the entrance of described parallel core displacement system respectively by six-way valve.
3. method of work according to claim 1, it is characterized in that, described basket one, described basket two, described basket three are connected in parallel by measuring point.
4. method of work according to claim 1, it is characterized in that, vacuumize 3 ~ 4 hours to the described basket one processed through step (1), described basket two and described basket three by vacuum machine, described vacuum machine negative pressure is 0.1MPa.
5. method of work according to claim 2, is characterized in that, in step (3), by constant-flux pump, the described local water held in the intermediate receptacle of local water is pumped into described basket one, described basket two and described basket three.
6. method of work according to claim 2, is characterized in that, in step (5), by constant-flux pump, the described frothing agent held in the intermediate receptacle of frothing agent is pumped into described basket one, described basket two and described basket three; In step (5), frothing agent pumps into the speed of described basket one, described basket two and described basket three for (0.5 ~ 3) ml/min; Gas and frothing agent mix at described basket one, described basket two and described basket three respectively, and mixed volume ratio is (0.3:1) ~ (3:1); Gas and frothing agent mix at described basket one, described basket two and described basket three respectively and produce foam, and the cumulative volume producing foam is (0.2 ~ 5) PV.
7. method of work according to claim 1, it is characterized in that, described the scan image that step (5) obtains is converted into gray-scale map, refer to: setting contrast is carried out, except hot-tempered pre-service to scan image step (5) obtained, strengthen the contrast of hole and matrix, by the experiment stain in hot-tempered removal image, scan image is converted into only containing the gray-scale map of brightness.
8. method of work according to claim 1, it is characterized in that, described the gray-scale map that step (6) obtains is carried out scanning, splitting, refer to: adopt indicator Kriging method to carry out binary conversion treatment to the gray-scale map that step (6) obtains, distinguish hole and matrix, again adopt indicator Kriging method to carry out binary conversion treatment to hole, gas phase and liquid phase region are separated.
9. method of work according to claim 1, it is characterized in that, describedly set up core model 3-D data volume, refer to: the gray-scale map after step (7) scanning, segmentation is superposed, form 3 d data field, obtain the three-dimensional reconstruction result of model pore space, add up gray-scale value that gas phase is not corresponding in the same time, obtain not gas phase saturation in the same time.
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| US4426879A (en) * | 1982-06-21 | 1984-01-24 | Mobil Oil Corporation | Method and apparatus for determining the foaming characteristics of crude oil |
| US5157960A (en) * | 1990-02-06 | 1992-10-27 | Massachusetts Institute Of Technology | Method and apparatus for transient measurement of gas permeability in closed-cell foam insulation |
| CN102865898A (en) * | 2012-08-27 | 2013-01-09 | 中国石油大学(华东) | Device and method for measuring parallel core foam flooding gas-phase shunt volume |
| CN104076046A (en) * | 2013-03-28 | 2014-10-01 | 中国石油化工股份有限公司 | Method for collecting and quantitatively characterizing microcosmic distribution images of remaining oil in porous media |
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