CN103352680B - Foam based on the integration of pit shaft oil reservoir is handled up sediment outflow experimental facilities and method - Google Patents
Foam based on the integration of pit shaft oil reservoir is handled up sediment outflow experimental facilities and method Download PDFInfo
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- CN103352680B CN103352680B CN201310280949.7A CN201310280949A CN103352680B CN 103352680 B CN103352680 B CN 103352680B CN 201310280949 A CN201310280949 A CN 201310280949A CN 103352680 B CN103352680 B CN 103352680B
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Abstract
The present invention is that a kind of foam based on the integration of pit shaft oil reservoir is handled up sediment outflow experimental facilities and method; This experimental facilities to be communicated with the 4th fill out sand tube for simulating oil deposit cushion space to be formed by being provided with the core holding unit of artificial core, the second fill out sand tube in order to simulation wellbore hole, the first fill out sand tube with simulation wellbore hole cushion space; The arrival end of the second fill out sand tube is communicated with the outlet chamber of a piston type stirred vessel, and this outlet chamber is also communicated with a nitrogen cylinder, is provided with multiple valve and multiple pressure sensor in the connecting pipeline of above-mentioned parts; Each pressure sensor is connected with a data acquisition unit.This experimental facilities is the theory based on pit shaft and oil reservoir integration, and fully take into account the damping characteristics of pit shaft and oil reservoir, that considers pit shaft preserves effect, can simulate foam from the whole technological process being injected into displacement.
Description
Technical field
The invention relates to a kind of foam to handle up sediment outflow experimental facilities, particularly relate to a kind of foam based on the integration of pit shaft oil reservoir and to handle up sediment outflow experimental facilities and method.
Background technology
For the problem of near wellbore zone blocking in development process, utilize the characteristic of aerated fluid self, handled up by foam, circulation mixing, near wellbore zone sand grains is discharged together with obstruction, thus reaches the object removed near wellbore zone compound blocking, improve perforation holes, improve gravel filling sand prevention effect, improve near wellbore zone seepage flow situation.Foam mixing stimulation technology is mainly used in two class oil wells, and a class is the old well that in manufacturing process, blocking occurs near wellbore zone, and another kind of is the new well being about to go into operation; Old well is mainly used in removing the blocking of organic and inorganic compound, improves sand controlling result; New well is mainly used in removing pollution in drilling process, improves perforation holes, improves near wellbore zone seepage flow situation, improves gravel filling sand prevention effect.Foam mixing stimulation technology effect in oil development is remarkable, generally applies as conventional measure technique.
In order to improve foam mixing stimulation technology further, foam flooding is adopted to carry out foam flooding for simulated experiment for experimental facilities at present.As shown in Figure 5, existing foam flooding is formed by with lower part for experimental facilities 9, injection pump 91, three intermediate receptacles 92, six-way valve 93, nitrogen cylinder 94, flow meter 941, pressure meter 95, two core holding units 96, back-pressure valve 97, eliminator 98, they are arranged in a baking oven 99.Three intermediate receptacles 92 are equipped with frother, oil and formation water respectively and are arranged in parallel, and two core holding units 96 are equipped with two blocks of rock cores respectively, injection pump 91 and three intermediate receptacles that frother, oil and formation water are housed are together in series.The experimental technique that foam flooding replaces is, by injection pump, the oil pump in intermediate receptacle is entered in basket to make rock core saturated oils; Then formation water is pumped into rock core, water drive is to pressure stability; Finally foaming agent solution and nitrogen mixed by six-way valve and inject rock core, the pressure reduction change at record rock core two ends, until pressure stability.
The feature of above-mentioned prior art is, under different oil-containing condition, carries out foam flooding for seepage flow characteristics research, can replace seepage flow mechanism by deep enough understanding foam flooding; But also there is following shortcoming in above-mentioned prior art:
(1) analog type is single:
Can only foam flooding, cannot flow behavior in simulation wellbore hole for seepage flow characteristics in simulated formation, thus can not full simulation from the whole flow process being injected into displacement;
(2) assumed condition is too idealized:
Actual oil reservoir has compressibilty, and only to carry out simulating oil deposit with core holding unit be well to experience the compressibilty of oil reservoir;
(3) experiment condition is too simplified:
Foam and nitrogen are mixed in six-way valve, what can not mix is very even, likely occurs slug, that is: one section of frother, one section of nitrogen;
(4) experiment purpose is simple:
Only be used to understanding liquid foams drainage feature, do not combine with practical application.
Thus, the present inventor relies on and is engaged in experience and the practice of relevant industries for many years, proposes a kind of foam based on the integration of pit shaft oil reservoir and to handle up sediment outflow experimental facilities and method, to overcome the defect of prior art.
Summary of the invention
A kind of foam based on the integration of pit shaft oil reservoir is the object of the present invention is to provide to handle up sediment outflow experimental facilities and method, this experimental facilities is based on the thought of pit shaft oil reservoir integration, fully take into account the damping characteristics of pit shaft and oil reservoir, that considers pit shaft preserves effect, to realize simulation foam from the whole technological process being injected into displacement, study the multiple research objects from pit shaft to oil reservoir.
The object of the present invention is achieved like this, and a kind of foam based on the integration of pit shaft oil reservoir is handled up sediment outflow experimental facilities; Described experimental facilities comprises a core holding unit, arranges the artificial core being used for simulating oil deposit in core holding unit; This core holding unit one end is communicated with in order to the sidewall of the second fill out sand tube of simulation wellbore hole with one by the 9th valve, the sidewall of this second fill out sand tube is also communicated with one in order to one end of the first fill out sand tube of simulation wellbore hole cushion space, this end of first fill out sand tube is provided with the second pressure sensor, and the other end of the first fill out sand tube is provided with the 6th valve with air conducting; The arrival end of described second fill out sand tube is communicated with the outlet chamber of a piston type stirred vessel by the 4th valve, the arrival end of this second fill out sand tube is also provided with the first pressure sensor, and the port of export of this second fill out sand tube is provided with the 3rd pressure sensor and the 7th valve with air conducting; The outlet chamber of this piston type stirred vessel is also communicated with a nitrogen cylinder by the 3rd valve, and this outlet chamber also passes through the 5th valve and air conducting; The entrance chamber of this piston type stirred vessel is by the second valve and air conducting; Described core holding unit one end is provided with the 4th pressure sensor; The other end of described core holding unit is communicated with the 4th fill out sand tube for simulating oil deposit cushion space by the 14 valve, and the other end of the 4th fill out sand tube is by the 15 valve and air conducting; The other end of described core holding unit is also provided with the 6th pressure sensor; Described each pressure sensor is connected with a data acquisition unit.
In a better embodiment of the present invention, the sidewall of described core holding unit connects a hand ring pressure delivery side of pump by the 12 valve, and the first reservoir of liquid is equipped with in the import of this hand ring press pump by the 13 valve and one; The sidewall of core holding unit is provided with the 5th pressure sensor.
In a better embodiment of the present invention, the second container that the entrance chamber of this piston type stirred vessel is equipped with liquid by the first valve and constant-flux pump and is communicated with.
In a better embodiment of the present invention, described 9th valve in parallel is provided with one the 3rd fill out sand tube, and the 3rd fill out sand tube two ends are respectively equipped with the 8th valve and the 11 valve, and the tube wall of the 3rd fill out sand tube is provided with the tenth valve with air conducting.
In a better embodiment of the present invention, described artificial core is axially made up of upper end layer, lower end layer and intermediate course along it; The man-made fracture that one axially runs through described upper end layer, lower end layer and intermediate course is provided with in described artificial core; Described upper and lower end layer is the glued layer be made up of epoxy resin and glass microballoon.
In a better embodiment of the present invention, described intermediate course is non-glued layer.
In a better embodiment of the present invention, described intermediate course is part glued layer or whole glued layer.
Object of the present invention can also realize like this, and the foam based on the integration of pit shaft oil reservoir is handled up sediment outflow experimental technique, and described experimental technique comprises the following steps:
(1) making artificial rock core artificial core is put into core holding unit, closes all valves;
(2) foam is prepared:
Frother and distilled water are added in the outlet chamber of piston type stirred vessel, open the 3rd valve and add nitrogen in the outlet chamber of piston type stirred vessel, close the 3rd valve afterwards;
(3) add ring pressure and inject foam to artificial core:
Open the 12 valve, the 13 valve, add ring pressure by hand ring press pump to core holding unit; Open the first, the 4th, the 9th and the 14 valve, unlatching constant-flux pump pressurizes to the entrance chamber of piston type stirred vessel, pumps into foam by the outlet chamber of piston type stirred vessel to core holding unit; Observe the force value change of the 6th pressure sensor;
(4) open flow:
When the 6th pressure sensor force value reaches on the pressure drafted, closedown first and the 4th valve, close constant-flux pump afterwards, slowly open the 6th valve and carry out open flow, the sand collected open flow liquid and carry out, and the force value change noting observation the first ~ six pressure sensor; The timing of open flow process;
(5) pressure release take out artificial core:
When the open flow time reaches design time, close the 6th valve; Open the second valve, the 5th valve, the 6th valve, the 7th valve and the 15 valve successively and carry out pressure release, while ballast line pressure, by hand ring press pump unloading ring pressure; After pressure is all down to atmospheric pressure, open core holding unit, removal of core, rock core is taken pictures, observe; Open the first fill out sand tube, the second fill out sand tube, collect foamover gravel out;
(6) gravel of collection is dried, weighed; Sub-elect the gravel of different-grain diameter again with screen cloth, weigh respectively.
In a better embodiment of the present invention, in step (1), according to the displacement pressure of experiment and the ratio of ring forcing up the targets allotment epoxy resin and glass microballoon; The man-made fracture that one axially runs through described upper end layer, lower end layer and intermediate course is provided with in described artificial core; This man-made fracture is by inserting copper sheet and the gap stayed after extracting copper sheet out rock core when rock core is completely not cementing and obtaining in the rock core of compacting.
From the above mentioned, the foam that the present invention is based on the integration of pit shaft oil reservoir is handled up sediment outflow experimental facilities and method, it is the theory based on pit shaft and oil reservoir integration, fully take into account the damping characteristics of pit shaft and oil reservoir, that considers pit shaft preserves effect, can simulate foam from the whole technological process being injected into displacement.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1: for the foam that the present invention is based on the integration of pit shaft oil reservoir is handled up the structural representation of sediment outflow experimental facilities.
Fig. 2 A: be the cross sectional representation of artificial core in the present invention.
Fig. 2 B: be A-A cross-sectional view in Fig. 2 A.
Fig. 3: be the structural representation of piston type stirred vessel in the present invention.
Fig. 4: be the 4th fill out sand tube structural representation for simulating oil deposit cushion space in the present invention.
Fig. 5: for existing foam flooding is for the structural representation of experimental facilities.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.
As shown in Figure 1, the present invention proposes a kind of foam based on the integration of pit shaft oil reservoir and to handle up sediment outflow experimental facilities 100; Described experimental facilities 100 comprises a core holding unit 1, arranges the artificial core 11 being used for simulating oil deposit in core holding unit 1; This core holding unit 1 one end is communicated with in order to the sidewall of the second fill out sand tube 22 of simulation wellbore hole with one by the 9th valve 809, the sidewall of this second fill out sand tube 22 is also communicated with one in order to one end of the first fill out sand tube 21 of simulation wellbore hole cushion space, the other end that first this end of fill out sand tube 21 is provided with the second pressure sensor 72, first fill out sand tube 21 is provided with the 6th valve 806 with air conducting; The arrival end of described second fill out sand tube 22 is communicated with by the outlet chamber 31 of the 4th valve 804 with a piston type stirred vessel 3, the arrival end of this second fill out sand tube 22 is also provided with the first pressure sensor 71, and the port of export of this second fill out sand tube 22 is provided with the 3rd pressure sensor 73 and the 7th valve 807 with air conducting; The outlet chamber 31 of this piston type stirred vessel 3 is also communicated with a nitrogen cylinder 4 by the 3rd valve 803, and this outlet chamber 31 also passes through the 5th valve 805 and air conducting; The entrance chamber 32 of this piston type stirred vessel 3 is by the second valve 802 and air conducting; Described core holding unit 1 one end is provided with the 4th pressure sensor 74; The other end of described core holding unit 1 is communicated with the 4th fill out sand tube 24 for simulating oil deposit cushion space by the 14 valve 814, and the other end of the 4th fill out sand tube 24 is by the 15 valve 815 and air conducting; The other end of described core holding unit 1 is also provided with the 6th pressure sensor 76; Described each pressure sensor is connected with a data acquisition processing device (not shown); The sidewall of described core holding unit 1 connects the outlet of a hand ring press pump 5 by the 12 valve 812, the first container 61 that the import of this hand ring press pump 5 is equipped with liquid by the 13 valve 813 and is communicated with; The sidewall of core holding unit 1 is provided with the 5th pressure sensor 75; The second container 62 that the entrance chamber 32 of this piston type stirred vessel 3 is equipped with liquid by the first valve 801 and constant-flux pump 63 and is communicated with.
In existing artificial core, only prepare the artificial core with certain permeability by epoxy gluing glass microballoon technique, the condition that flowing sand appears in inside, stratum can not be realized, therefore, the rule of formation sand production in whole recovery process can not be reflected more truly; In the present embodiment, devise the cementing monomer experimental model of layering, cast stratum physical model by epoxy gluing glass microballoon technique and layering cementation process, can the condition of flowing sand to realize that inside, stratum occurs.As shown in Fig. 2 A, Fig. 2 B, described artificial core 11 is axially made up of upper end layer 111, lower end layer 113 and intermediate course 112 along it; The man-made fracture 114 that one axially runs through described upper end layer 111, lower end layer 113 and intermediate course 112 is provided with in described artificial core 11; Described upper and lower end layer 111,113 is the glued layer be made up of epoxy resin and glass microballoon; Described intermediate course 112 is non-glued layer, is simulated the mobility of sand grains by man-made fracture 114 and intermediate course 112; Described intermediate course 112 also can be part glued layer or whole glued layer.In the present embodiment, according to the displacement pressure of experiment and the ratio of ring forcing up the targets allotment epoxy resin and glass microballoon; Described man-made fracture is by inserting copper sheet and the gap stayed after extracting copper sheet out rock core when rock core is completely not cementing and obtaining in the rock core of compacting.
In existing foam displacement test, foam normally directly injects, and not through mixing; In the present embodiment, as shown in Figure 1, Figure 3, piston type stirred vessel 3(piston type stirred vessel is adopted to be prior art, therefore its structure is repeated no more), mounted motor 33 below piston type stirred vessel 3, motor uniform motion, impeller is at the uniform velocity stirred, and makes the foams mix in container even; Thus, make the more even of the foams mix prepared, thus foam mixing process that is virtually reality like reality.
In existing foam mixing experiment, just go displacement to clamp rock core with foam simply, simulating oil deposit does not arrange cushion space; And the cushion space of simulation wellbore hole and simulation wellbore hole is not set in experimental facilities yet; Because formation rock has compressibilty, pressure raises and its space is increased, thus the space of foam filling is greater than the original void space in stratum; Therefore, existing experimental facilities cannot stratum that is virtually reality like reality.And in present embodiment, the 4th fill out sand tube 24(of the second fill out sand tube 22 of simulation wellbore hole, the first fill out sand tube 21 of simulation wellbore hole cushion space and simulating oil deposit cushion space is provided with as shown in Figure 4 in described experimental facilities, described each fill out sand tube is existing structure, for two ends have the tubular structure of blind end), the filling space of foam is increased by design cushion space, the space of having more than needed out due to compression in simulation actual formation, for the open flow process of mixing experiment provides lasting pressure, thus, the real processes of foam mixing is explored.
In foam displacement test in the past, the collection of data mostly is artificial collection, and then artificial or computer process, and such result often causes inefficiency, error to increase.In the present embodiment, adopt a set of Data Acquisition & Processing Software---foam mixing simulation softward system, this software can realize three functions: 1, each measuring point pressure of timely monitor model; 2, pressure-plotting is shown, and real-time snap shot; 3, gathering the data obtained can Auto-Memory; Obtain the Pressure Variation of whole foam mixing overall process.These software systems comprise six parts such as operating system, data display, real-time curve, data readback, curve playback, proving operation.The major function of operating system is serial ports between opening/closing and sensor, realizes the transmission of signal, conversion, and the voltage signal of reception is automatically converted to pressure signal; Data display unit major function is real time data, pressure distribution and the voltage signal that display gathers; Real-time curve part mainly shows the pressure history of each measuring point in whole experimentation; Data readback and curve playback section major function carry out specimens preserving to the data gathered, image; The Main Function of proving operation is the transformational relation determined between voltage signal and pressure signal, realizes the automatic conversion between signal.
As shown in Figure 1, also propose a kind of foam based on the integration of pit shaft oil reservoir in the present embodiment and to handle up sediment outflow experimental technique, described experimental technique comprises the following steps:
(1) making artificial rock core artificial core is put into core holding unit, closes all valves;
(2) foam is prepared:
Frother and distilled water are added in the outlet chamber of piston type stirred vessel, open the 3rd valve and add nitrogen in the outlet chamber of piston type stirred vessel, close the 3rd valve afterwards;
(3) add ring pressure and inject foam to artificial core:
Open the 12 valve, the 13 valve, add ring pressure by hand ring press pump to core holding unit; Open the first, the 4th, the 9th and the 14 valve, unlatching constant-flux pump pressurizes to the entrance chamber of piston type stirred vessel, pumps into foam by the outlet chamber of piston type stirred vessel to core holding unit; Observe the force value change of the 6th pressure sensor;
(4) open flow:
When the 6th pressure sensor force value reaches on the pressure drafted, closedown first and the 4th valve, close constant-flux pump afterwards, slowly open the 6th valve and carry out open flow, the sand collected open flow liquid and carry out, and the force value change noting observation the first ~ six pressure sensor; The timing of open flow process;
(5) pressure release take out artificial core:
When the open flow time reaches design time, close the 6th valve; Open the second valve, the 5th valve, the 6th valve, the 7th valve and the 15 valve successively and carry out pressure release, while ballast line pressure, by hand ring press pump unloading ring pressure; After pressure is all down to atmospheric pressure, open core holding unit, removal of core, rock core is taken pictures, observe; Open the first fill out sand tube, the second fill out sand tube, collect foamover gravel out;
(6) gravel of collection is dried, weighed; Sub-elect the gravel of different-grain diameter again with screen cloth, weigh respectively.
In the present embodiment, in order to the sand amount that goes out entrained by Real-Time Monitoring mixing experiment, as shown in Figure 1, described 9th valve 809 two ends parallel connection is provided with one the 3rd fill out sand tube 23,3rd fill out sand tube 23 two ends are respectively equipped with the 8th valve the 808 and the 11 valve 811, and the tube wall of the 3rd fill out sand tube 23 is provided with the tenth valve 810 with air conducting.The use procedure of the 3rd fill out sand tube 23 is, in the open flow of above-mentioned steps (4), the 9th valve 809 is closed, slowly open the tenth valve the 810 and the 11 valve 811, the fluid of open flow is made to carry out open flow, with the sand collecting open flow liquid and carry out through the 3rd fill out sand tube 23; In open flow process, closedown one order per minute 11 valves 811, take off the 3rd fill out sand tube 23, collect the liquid in its drain and storage sand tube and sand body, realize Real-Time Monitoring sand production rate; Load onto the 3rd fill out sand tube 23, open the 11 valve 811, after no liquid is discharged again, open the second valve, the 5th valve, the 6th valve, the 7th valve and the 15 valve successively and carry out pressure release.
In existing foam mixing experiment, do not consider that fine silt discharges degree to the impact of near wellbore permeability, the rule often drawn is too unilateral; And in the experimental technique of present embodiment, can adopt in step (1), the artificial core of known permeability and degree of porosity is put into clamper; And after step (6), write down sand production rate now and measure permeability and the degree of porosity of this current rock core; Afterwards, then this rock core is put into core holding unit, repeat experimentation; Operation like this can obtain different sand production rate (namely fine silt the discharges degree) impacts near wellbore permeability.Thus, present embodiment, has taken into full account that fine silt discharges the factor such as degree, content to the impact of oil well production effect; The fine silt of different-grain diameter is near wellbore zone Permeability; The discharge of different content fine silt is near wellbore zone Permeability.
From the above mentioned, the foam that the present invention is based on the integration of pit shaft oil reservoir is handled up sediment outflow experimental facilities and method, it is the theory based on pit shaft and oil reservoir integration, fully take into account the damping characteristics of pit shaft and oil reservoir, that considers pit shaft preserves effect, can simulate foam from the whole technological process being injected into displacement.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.
Claims (9)
1. the foam based on the integration of pit shaft oil reservoir is handled up sediment outflow experimental facilities; It is characterized in that: described experimental facilities comprises a core holding unit, the artificial core being used for simulating oil deposit is set in core holding unit; This core holding unit one end is communicated with in order to the sidewall of the second fill out sand tube of simulation wellbore hole with one by the 9th valve, the sidewall of this second fill out sand tube is also communicated with one in order to one end of the first fill out sand tube of simulation wellbore hole cushion space, this end of first fill out sand tube is provided with the second pressure sensor, and the other end of the first fill out sand tube is provided with the 6th valve with air conducting; The arrival end of described second fill out sand tube is communicated with the outlet chamber of a piston type stirred vessel by the 4th valve, the arrival end of this second fill out sand tube is also provided with the first pressure sensor, and the port of export of this second fill out sand tube is provided with the 3rd pressure sensor and the 7th valve with air conducting; The outlet chamber of this piston type stirred vessel is also communicated with a nitrogen cylinder by the 3rd valve, and this outlet chamber also passes through the 5th valve and air conducting; The entrance chamber of this piston type stirred vessel is by the second valve and air conducting; Described core holding unit one end is provided with the 4th pressure sensor; The other end of described core holding unit is communicated with the 4th fill out sand tube for simulating oil deposit cushion space by the 14 valve, and the other end of the 4th fill out sand tube is by the 15 valve and air conducting; The other end of described core holding unit is also provided with the 6th pressure sensor; Described each pressure sensor is connected with a data acquisition unit.
2. to handle up sediment outflow experimental facilities based on the foam of pit shaft oil reservoir integration as claimed in claim 1, it is characterized in that: the sidewall of described core holding unit connects a hand ring pressure delivery side of pump by the 12 valve, and the first reservoir of liquid is equipped with in the import of this hand ring press pump by the 13 valve and one; The sidewall of core holding unit is provided with the 5th pressure sensor.
3. to handle up sediment outflow experimental facilities based on the foam of pit shaft oil reservoir integration as claimed in claim 1, it is characterized in that: the second container that the entrance chamber of this piston type stirred vessel is equipped with liquid by the first valve and constant-flux pump and is communicated with.
4. to handle up sediment outflow experimental facilities based on the foam of pit shaft oil reservoir integration as claimed in claim 1, it is characterized in that: described 9th valve in parallel is provided with one the 3rd fill out sand tube, 3rd fill out sand tube two ends are respectively equipped with the 8th valve and the 11 valve, and the tube wall of the 3rd fill out sand tube is provided with the tenth valve with air conducting.
5. to handle up sediment outflow experimental facilities based on the foam of pit shaft oil reservoir integration as claimed in claim 1, it is characterized in that: described artificial core is axially made up of upper end layer, lower end layer and intermediate course along it; The man-made fracture that one axially runs through described upper end layer, lower end layer and intermediate course is provided with in described artificial core; Described upper and lower end layer is the glued layer be made up of epoxy resin and glass microballoon.
6. to handle up sediment outflow experimental facilities based on the foam of pit shaft oil reservoir integration as claimed in claim 5, it is characterized in that: described intermediate course is non-glued layer.
7. to handle up sediment outflow experimental facilities based on the foam of pit shaft oil reservoir integration as claimed in claim 5, it is characterized in that: described intermediate course is part glued layer or whole glued layers.
8. utilize any one of the claims 1 ~ 7 to handle up the method that sediment outflow experimental facilities carries out testing based on the foam of pit shaft oil reservoir integration, described experimental technique comprises the following steps:
(1) making artificial rock core artificial core is put into core holding unit, closes all valves;
(2) foam is prepared:
Frother and distilled water are added in the outlet chamber of piston type stirred vessel, open the 3rd valve and add nitrogen in the outlet chamber of piston type stirred vessel, close the 3rd valve afterwards;
(3) add ring pressure and inject foam to artificial core:
Open the 12 valve, the 13 valve, add ring pressure by hand ring press pump to core holding unit; Open the first, the 4th, the 9th and the 14 valve, unlatching constant-flux pump pressurizes to the entrance chamber of piston type stirred vessel, pumps into foam by the outlet chamber of piston type stirred vessel to core holding unit; Observe the force value change of the 6th pressure sensor;
(4) open flow:
When the 6th pressure sensor force value reaches on the pressure drafted, closedown first and the 4th valve, close constant-flux pump afterwards, slowly open the 6th valve and carry out open flow, the sand collected open flow liquid and carry out, and the force value change noting observation the first ~ six pressure sensor; The timing of open flow process;
(5) pressure release take out artificial core:
When the open flow time reaches design time, close the 6th valve; Open the second valve, the 5th valve, the 6th valve, the 7th valve and the 15 valve successively and carry out pressure release, while ballast line pressure, by hand ring press pump unloading ring pressure; After pressure is all down to atmospheric pressure, open core holding unit, removal of core, rock core is taken pictures, observe; Open the first fill out sand tube, the second fill out sand tube, collect foamover gravel out;
(6) gravel of collection is dried, weighed; Sub-elect the gravel of different-grain diameter again with screen cloth, weigh respectively.
9. to handle up the method that sediment outflow experimental facilities carries out testing based on the foam of pit shaft oil reservoir integration as claimed in claim 8, it is characterized in that: in step (1), according to the displacement pressure of experiment and the ratio of ring forcing up the targets allotment epoxy resin and glass microballoon; The man-made fracture that one axially runs through described upper end layer, lower end layer and intermediate course is provided with in described artificial core; This man-made fracture is by inserting copper sheet and the gap stayed after extracting copper sheet out rock core when rock core is completely not cementing and obtaining in the rock core of compacting.
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| CN201810294U (en) * | 2010-10-14 | 2011-04-27 | 中国石油天然气股份有限公司 | Indoor simulation experiment device for high temperature gas well foaming drainage |
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| CN203335049U (en) * | 2013-07-05 | 2013-12-11 | 中国石油大学(北京) | Foam taking-in and sending-out sand discharging experimental device based on shaft and oil reservoir integration |
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| US4643252A (en) * | 1985-06-24 | 1987-02-17 | Atlantic Richfield Company | Carbon dioxide miscible displacement process |
| CN101012743A (en) * | 2007-02-02 | 2007-08-08 | 中国石油大学(华东) | Loose sand oil accumulation replacement sand prevention method |
| CN201818292U (en) * | 2010-06-02 | 2011-05-04 | 中国石油化工股份有限公司 | Foam generator for displacement experiment |
| CN201810294U (en) * | 2010-10-14 | 2011-04-27 | 中国石油天然气股份有限公司 | Indoor simulation experiment device for high temperature gas well foaming drainage |
| CN203335049U (en) * | 2013-07-05 | 2013-12-11 | 中国石油大学(北京) | Foam taking-in and sending-out sand discharging experimental device based on shaft and oil reservoir integration |
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