CN104062214A - Well-bore sulfur deposit visual experiment device and well-bore sulfur deposit visual experiment method - Google Patents
Well-bore sulfur deposit visual experiment device and well-bore sulfur deposit visual experiment method Download PDFInfo
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Abstract
The invention discloses a well-bore sulfur deposit visual experiment device. The well-bore sulfur deposit visual experiment device comprises a displacement system, a well-bore sulfur deposit analog system, an image collecting system and a waste gas treating system, wherein the displacement system comprises a constant-speed constant-pressure pump (1), a middle container (3), a gas injection pump (4), a sampler (6), a vacuum pump (8), a back pressure pump (20), a back pressure valve (22) and a throttle valve (23); the well-bore deposit analogue system comprises a visual device (14), a visual window (16), a bracket (28) and a multifunctional oven (29); the image collecting system comprises a high-power microscope (15) and a computer (19). The invention further discloses an experiment method adopting the experiment device. The device and the method disclosed by the invention have beneficial effects of being capable of simulating well-bore production conditions, and realizing real-time observation of the whole microscopic dynamic process including an elemental sulfur separation way, elemental sulfur deposition, a crystal growth microscopic dynamic process, deposition morphology, and the like.
Description
Technical field
The present invention relates to exploitation of oil-gas field technical field, particularly sulphur deposition in wellhole visual experimental apparatus and method.
Background technology
It is widely distributed that high sour gas is ensconced the world.Along with deepening continuously of China's oil-gas field development, increasing high sulfur-bearing or extra-high-speed sulfur Gas Fields are found in China in succession.The sulfur-bearing gas reservoir of China is mainly distributed in Ordos Basin, the Sichuan Basin, Bohai gulf basin and Tarim Basin etc.High sulfur-bearing gas reservoir is the special gas reservoir of a class, in high sulfur-bearing gas reservoir because H
2the existence of S, make its physical property characteristic and conventional gas have larger difference, and the difference of high sulfur-bearing gas reservoir and normal gas pools maximum is just, in gas well recovery process, along with the variation of temperature and pressure, can undergo phase transition, in gas, separate out elemental sulfur, in the time that elemental sulfur can not be carried away by gas, will produce sulphur depositional phenomenon.In high sulfur-bearing gas reservoir recovery process, in stratum, pit shaft and uphole equipment, all may there is sulphur deposition, cause the obstruction of gas channel, cause gas well deliverability sharply to decline, even stop production.Be deposited on corrosion and destruction that the sulphur on pipeline also can cause tubing.The deposition of elemental sulfur in pit shaft is ubiquitous difficulties in high sulfur-bearing gas reservoir performance history, is one of bottleneck of the high sulfur-bearing gas reservoir exploitation of restriction.At present, both at home and abroad on sulphur the dissolving in rock gas and separate out, the deposition position of sulphur, the aspect such as factor that affect sulphur deposition have certain research, but the separate out mode of shortage to sulphur crystal, separates out form and the intensive research of the growth pattern of sulphur on the borehole wall.Therefore, sulphur deposition in wellhole experimental provision has been proposed to new requirement, having comprised: 1) can characterize wellbore conditions; 2) can realize the mode of separating out, elemental sulfur deposition and the crystal growth micro dynamic course of elemental sulfur in pit shaft, the Real Time Observation of deposition morphology.At present also there is no to realize the device of sulphur deposition in wellhole microcosmic visualized experiment.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, a kind of sulphur deposition in wellhole visual experimental apparatus and method that in pit shaft, elemental sulfur is observed online from precipitateing into the whole micro dynamic course of growth deposition that realize is provided.
Object of the present invention is achieved through the following technical solutions: sulphur deposition in wellhole visual experimental apparatus, it comprises displacement system, sulphur deposition in wellhole simulation system, image capturing system and exhaust treatment system, described displacement system comprises constant speed and constant pressure pump, intermediate receptacle, gas inject pump, sample device, vacuum pump, backpressure pump, check valve and throttling valve, constant speed and constant pressure delivery side of pump connects end entrance under intermediate receptacle by pipeline, under connection constant speed and constant pressure delivery side of pump and intermediate receptacle, on the pipeline of end entrance, be provided with valve A, gas inject delivery side of pump connects the entrance of sample device by pipeline, on the pipeline of the entrance of connection gas inject delivery side of pump and sample device, be provided with valve B, the endpiece of vacuum pump is connected with the upper end entrance of intermediate receptacle by pipeline, the upper end entrance of the outlet of sample device and intermediate receptacle is all connected with the entrance point of sulphur deposition in wellhole simulation system by pipeline A, the outlet of sample device is provided with valve C, the endpiece of vacuum pump is provided with valve D, the upper end entrance of intermediate receptacle is provided with valve E, the endpiece of sulphur deposition in wellhole simulation system is connected by pipeline with the inlet end of check valve, the endpiece of check valve is connected with the inlet end of throttling valve by pipeline, check valve is connected by pipeline with backpressure pump, and be provided with valve F on the pipeline of connection check valve and backpressure pump.
Described pit shaft deposition simulation system comprises visualization device, visualization window, support and Multifunctional oven, intermediate receptacle, visualization device and support are all arranged in Multifunctional oven, visualization window is arranged on the body of Multifunctional oven and is positioned at the top of Multifunctional oven, visualization device by stent support to Multifunctional oven top, and align with visualization window in the center of visualization device, the inlet end of visualization device is connected with the outlet of intermediate receptacle upper end by pipeline A, the endpiece of visualization device is connected with the inlet end of check valve by pipeline, the inlet end of visualization device is respectively arranged with tensimeter A and valve G, the endpiece of visualization device is respectively arranged with valve H and tensimeter B.
Described image capturing system comprises high-power microscope and computing machine, high-power microscope be placed in visualization window directly over, computing machine is connected with the output terminal of high-power microscope by data line.
Described exhaust treatment system comprises sulfur recovery unit, gas treatment equipment and exhaust fan, the inlet end of sulfur recovery unit is connected with the endpiece of throttling valve by pipeline, the endpiece of sulfur recovery unit is connected with the inlet end of gas treatment equipment by pipeline, the endpiece of gas treatment equipment is connected with exhaust fan by pipeline, and the endpiece of gas treatment equipment is provided with valve I.
Described visualization device surrounds at the bottom of by sapphire glass top cover, high pressure tempering side wall glass and steel, on high pressure tempering side wall glass, is symmetrically arranged with air intake opening and gas outlet.
Described visualization window comprises taking over a business, chassis and connecting hole A, take over a business with chassis and be provided with central through hole, the periphery that the top of taking over a business is positioned at central through hole is provided with groove, in groove, place slide, connecting hole A runs through to take over a business and chassis successively, the top of baking oven is provided with top circular hole, is drilled with the connecting hole B matching with connecting hole A on the peripheral baking oven of top circular hole, takes over a business with chassis and is fixed by bolts to multi-function baking box top.
The sulphur deposition in wellhole microcosmic visualized experiment method that adopts described sulphur deposition in wellhole visual experimental apparatus, it comprises the following steps:
S1, cleaning pipeline;
S2, in sample device, carry out sample again according to prime stratum condition, according to prime stratum condition, a certain proportion of gaseous sample is injected to sample device;
S3, claim elemental sulfur powder, put into intermediate receptacle, and intermediate receptacle is evacuated with vacuum pump; Then with supercharge pump to supercharging in intermediate receptacle; Then close all valves;
S4, intermediate receptacle is heated to design temperature, and keep stable, open valve B, valve C, valve E, by the gas inject intermediate receptacle in sample device, after container inner pressure is stable, stop injecting valve-off B, valve C, valve E, regulate the temperature of Multifunctional oven to the temperature in wellbore of required simulation, and keep stable;
Sulphur deposition in wellhole microcosmic visualized experiment step when sulphur deposition in wellhole microcosmic visualized experiment step or closing well in S5, opening well and making production process;
In described opening well and making production process, sulphur deposition in wellhole microcosmic visualized experiment step comprises following sub-step:
The pressure of S511, setting backpressure pump, open valve A, valve E, valve G, valve H, valve F, valve I, set the pressure of constant speed and constant pressure pump, gas sample in the slow displacement intermediate receptacle of constant speed and constant pressure pump, gas reduces pressure by visualization device and by throttling valve, utilize high-power microscope and visualization window to observe the deposition process of separating out form, sulphur of sulphur in visualization device, the growth course of sulphur crystal, and by connected computer acquisition experiment picture, utilize sulfur recovery unit and gas treatment equipment to process experiment residual gas;
S512, change temperature by Multifunctional oven, observe under same pressure differential condition of different temperatures the deposition process of separating out form, sulphur of sulphur, the growth course of sulphur crystal in visualization device, and by connected computer acquisition experiment picture, utilize sulfur recovery unit 24 and gas treatment equipment 25 to process experiment residual gas;
S513, reset the temperature of Multifunctional oven, reach the temperature in wellbore of required simulation, and keep stable, repeating step S511;
S514, increase step by step the pressure of constant speed and constant pressure pump, observe under the different pressure reduction of uniform temp the deposition process of separating out form, sulphur of sulphur, the growth course of sulphur crystal in visualization device, and by connected computer acquisition experiment picture, utilize sulfur recovery unit and gas treatment equipment to process experiment residual gas;
S515, reset the pressure of backpressure pump, change visualization device endpiece pressure, the sulphur deposition situation of wellbore hole simulator diverse location, repeats experimental procedure S1 ~ S3, carries out many group experiments;
When described closing well, sulphur deposition in wellhole microcosmic visualized experiment step comprises following sub-step:
The pressure of S521, setting backpressure pump, open valve A, valve E, valve G, valve H, valve F, valve I, set the pressure of constant speed and constant pressure pump, gas sample in the slow displacement intermediate receptacle of constant speed and constant pressure pump, gas reduces pressure by visualization device and by throttling valve, keeps steady flow certain hour;
S522, valve-off A, valve E, valve G, valve H, simulation closing well state well-sinking sulphur deposition, utilize high-power microscope and visualization window to observe the deposition process of separating out form, sulphur of sulphur in visualization device, the growth course of sulphur crystal, and by connected computer acquisition experiment picture.
The present invention has the following advantages: energy wellbore hole simulator condition of the present invention, realize the mode of separating out, elemental sulfur deposition and the crystal growth micro dynamic course of elemental sulfur in pit shaft, the Real Time Observation of deposition morphology, realize elemental sulfur in pit shaft and deposit the online observation of whole micro dynamic course from precipitateing into grow.
Brief description of the drawings
Fig. 1 is structural representation of the present invention
Fig. 2 is the structural representation of visualization device of the present invention
Fig. 3 is the structural representation of visualization window of the present invention
Fig. 4 is the cut-open view of Fig. 3 along A-A cross section
In figure, 1-constant speed and constant pressure pump, 2-valve A, 3-intermediate receptacle, 4-gas inject pump, 5-valve B, 6-sample device, 7-valve C, 8-vacuum pump, 9-valve D, 10-valve E, 11-tensimeter A, 12-microscope stand, 13-valve G, 14-visualization device, 15-high-power microscope, 16-visualization window, 17-valve H, 18-tensimeter B, 19-computing machine, 20-backpressure pump, 21-valve F, 22-check valve, 23-throttling valve, 24-sulfur recovery unit, 25-gas treatment equipment, 26-valve I, 27-exhaust outlet, 28-support, 29-Multifunctional oven, 30-sapphire glass top cover, 31-high pressure tempering side wall glass, 32-gas outlet, at the bottom of 33-steel, 34-air intake opening, 35-groove, 36-takes over a business, 37-chassis, 38-connecting hole A.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, and protection scope of the present invention is not limited to the following stated:
As shown in Figure 1, sulphur deposition in wellhole visual experimental apparatus, it comprises displacement system, sulphur deposition in wellhole simulation system, image capturing system and exhaust treatment system, described displacement system comprises constant speed and constant pressure pump 1, intermediate receptacle 3, gas inject pump 4, sample device 6, vacuum pump 8, backpressure pump 20, check valve 22 and throttling valve 23, the outlet of constant speed and constant pressure pump 1 connects 3 times end entrances of intermediate receptacle by pipeline, connect on the outlet of constant speed and constant pressure pump 1 and the pipeline of 3 times end entrances of intermediate receptacle and be provided with valve A2, the outlet of gas inject pump 4 connects the entrance of sample device 6 by pipeline, on the pipeline of the outlet of connection gas inject pump 4 and the entrance of sample device 6, be provided with valve B5, the endpiece of vacuum pump 8 is connected with the upper end entrance of intermediate receptacle 3 by pipeline, the upper end entrance of the outlet of sample device 6 and intermediate receptacle 3 is all connected with the entrance point of sulphur deposition in wellhole simulation system by pipeline A, be that the outlet of sample device 6 and the upper end entrance of intermediate receptacle 3 are also interconnected, the outlet of sample device 6 is provided with valve C7, the endpiece of vacuum pump 8 is provided with valve D9, the upper end entrance of intermediate receptacle 3 is provided with valve E10, the endpiece of sulphur deposition in wellhole simulation system is connected by pipeline with the inlet end of check valve 22, the endpiece of check valve 22 is connected with the inlet end of throttling valve 23 by pipeline, check valve 22 is connected by pipeline with backpressure pump 20, and be provided with valve F21 on the pipeline of connection check valve 22 and backpressure pump 20,
Constant speed and constant pressure pump 1 is for providing the steady flow of fluid constant speed, constant voltage; Intermediate receptacle 3 is piston type, for depositing sour gas sample, drives the piston of intermediate receptacle 3 by constant speed and constant pressure pump 1, by the sour gas sample displacement that is placed in intermediate receptacle 3 to sulphur deposition in wellhole simulation system; Gas inject pump 4, for by the gas inject intermediate receptacle 3 of sample device 6, mixes with the sulphur powder in intermediate receptacle 3; Sample device 6 is for the sample of test(ing) medium; Vacuum pump 8 is for being evacuated in intermediate receptacle 3, Exhaust Gas; Backpressure pump 20 and check valve 22 can be controlled the output end pressure of sulphur deposition in wellhole simulation system; Throttling valve 23 can be controlled output pressure and the flow of displacement system, reduces the flow velocity of gas;
Described pit shaft deposition simulation system comprises visualization device 14, visualization window 16, support 28 and Multifunctional oven 29, intermediate receptacle 3, visualization device 14 and support 28 are all arranged in Multifunctional oven 29, visualization window 16 is arranged on the body of Multifunctional oven 29 and is positioned at the top of Multifunctional oven 29, open the circular hole of certain size at Multifunctional oven 29 tops, visualization window 16 is placed on the outer circular hole of Multifunctional oven 29, fixing with Multifunctional oven 29 sealings, visualization device 14 is supported to Multifunctional oven 29 tops by support 28, and align with visualization window 16 in the center of visualization device 14, the inlet end of visualization device 14 is connected with intermediate receptacle 3 upper end outlets by pipeline A, the endpiece of visualization device 14 is connected with the inlet end of check valve 22 by pipeline, the inlet end of visualization device 14 is respectively arranged with tensimeter A11 and valve G13, the endpiece of visualization device 14 is respectively arranged with valve H17 and tensimeter B18, visualization device 14 is for the visual observation of sulphur deposition process, visualization window 16 is in the outer online observation of Multifunctional oven 29 with take sulphur deposition process, support 28 is for being fixed on visualization device 14 at Multifunctional oven 29 tops, Multifunctional oven 29 is used to test that temperature in wellbore condition is provided,
Described image capturing system comprises high-power microscope 15 and computing machine 19, high-power microscope 15 be placed in visualization window 16 directly over, high-power microscope 15 is fixedly installed in the top of Multifunctional oven 29 by microscope stand 12, computing machine 19 is connected with the output terminal of high-power microscope 15 by data line.The image that high-power microscope 15 is observed is exported by computing machine 19, realizes the Real Time Observation of the sulphur deposition microprocess in visualization device 14, comprising: the mode of separating out, elemental sulfur deposition and crystal growth micro dynamic course, the deposition morphology etc. of elemental sulfur.
Described exhaust treatment system comprises sulfur recovery unit 24, gas treatment equipment 25 and exhaust fan, the inlet end of sulfur recovery unit 24 is connected with the endpiece of throttling valve 23 by pipeline, the endpiece of sulfur recovery unit 24 is connected with the inlet end of gas treatment equipment 25 by pipeline, the endpiece of gas treatment equipment 25 is connected with exhaust fan by pipeline, and the endpiece of gas treatment equipment 25 is provided with valve I26.24 li of sulfur recovery units are equipped with the chemical reagent such as toluene, for the recovery of waste gas sulphur; Gas treatment equipment 25, for waste gas is processed, reduces environmental pollution.Exhaust fan is for being discharged to atmosphere by the gas of processing.
As shown in Figure 2, described visualization device 14 33 surrounds at the bottom of by sapphire glass top cover 30, high pressure tempering side wall glass 31 and steel, is symmetrically arranged with air intake opening 34 and gas outlet 32 on high pressure tempering side wall glass 31.Visualization device 14 is rectangular structure, and the top of rectangular parallelepiped is sapphire glass top cover 30, and the end of rectangular parallelepiped is that 33, four sides are high pressure tempered glass at the bottom of N80-1 steel, is air intake opening 34 and gas outlet 32 at the both-side opening of rectangular parallelepiped.
As shown in Figure 3, Figure 4, described visualization window 16 comprises taking over a business 36, chassis 37 and connecting hole A38, take over a business 36 and chassis 37 be provided with central through hole, take over a business the periphery that 36 top is positioned at central through hole and be provided with groove 35, the interior placement slide of groove 35, connecting hole A38 runs through to take over a business 36 and chassis 37 successively, the top of baking oven is provided with top circular hole, on the peripheral baking oven of top circular hole, be drilled with the connecting hole B matching with connecting hole A38, take over a business 36 and chassis 37 be fixed by bolts to Multifunctional oven 29 tops.Groove 35, at Multifunctional oven 29 top Near Circular Hole In As, drills Multifunctional oven 29 tops according to the position of connecting hole A38 and size, and groove 35 is communicated with to take over a business 36, chassis 37 and Multifunctional oven 29 top circular holes.
embodiment 1:
The sulphur deposition in wellhole microcosmic visualized experiment method of the sulphur deposition in wellhole visual experimental apparatus described in described employing, it comprises the following steps:
S1, use alcohol, sherwood oil clean intermediate receptacle 3 and all experiment pipelines thereof;
S2, due to the gas sample of fetching from scene, its temperature and pressure is compared with the existing larger variation of formation condition, cause gas sample phase to change, need in sample device 6, carry out according to prime stratum condition sample again, according to experiment needs, by prime stratum condition, a certain proportion of gaseous sample is injected to sample device 6;
S3, take the elemental sulfur powder of 5g, put into intermediate receptacle 3, and intermediate receptacle 3 is evacuated with vacuum pump 8; Then with supercharge pump to the interior supercharging of intermediate receptacle 3; Described sulphur deposition in wellhole visual experimental apparatus is connected, then close all valves;
S4, intermediate receptacle 3 is heated to 130 DEG C, and stablize 3～4 hours, open valve B5, valve C7, valve E10, by the gas inject intermediate receptacle 3 in sample device 6, after container inner pressure is stable, stop injecting valve-off B5, valve C7, valve E10, regulate the temperature of Multifunctional oven 29 to 150 DEG C of the temperature in wellbore of simulating, and stablize 3～4 hours;
Sulphur deposition in wellhole microcosmic visualized experiment step in S5, opening well and making production process, it comprises following sub-step:
S511, the pressure of setting backpressure pump 20 is 40MPa, open valve A2, valve E10, valve G13, valve H17, valve F21, valve I26, the pressure of setting constant speed and constant pressure pump 1 is 40.1MPa, gas sample in the slow displacement intermediate receptacle 3 of constant speed and constant pressure pump 1, gas reduces pressure by visualization device 14 and by throttling valve 23, utilize high-power microscope 15 and visualization window 16 to observe the form of separating out of sulphur in visualization device 14, the deposition process of sulphur, the growth course of sulphur crystal on N80-1 carbon steel coupon, and gather experiment picture by connected computing machine 19, utilize sulfur recovery unit 24 and gas treatment equipment 25 to process experiment residual gas,
S512, change temperature by Multifunctional oven 29, it is 5 DEG C that step-length is set, observe under same pressure differential condition of different temperatures the deposition process of separating out form, sulphur of sulphur, the growth course of sulphur crystal in visualization device 14, and gather experiment picture by connected computing machine 19, utilize sulfur recovery unit 24 and gas treatment equipment 25 to process experiment residual gas;
S513, reset the temperature of Multifunctional oven 29, reach 150 DEG C of the temperature in wellbore of required simulation, and keep stable, repeating step S511, the pressure of setting backpressure pump 20 is 40MPa, open valve A2, valve E10, valve G13, valve H17, valve F21, valve I26, the pressure of setting constant speed and constant pressure pump 1 is 40.1MPa, gas sample in the slow displacement intermediate receptacle 3 of constant speed and constant pressure pump 1, gas reduces pressure by visualization device 14 and by throttling valve 23, utilize high-power microscope 15 and visualization window 16 to observe the form of separating out of sulphur in visualization device 14, the deposition process of sulphur, the growth course of sulphur crystal on N80-1 carbon steel coupon, and gather experiment picture by connected computing machine 19, utilize sulfur recovery unit 24 and gas treatment equipment 25 to process experiment residual gas,
S514, increase step by step the pressure of constant speed and constant pressure pump 1, the registration difference of tensimeter A11 and tensimeter B18 is changed between 0.1MPa ~ 0.5MPa, for example 40.2MPa, 40.3MPa, 40.4MPa, 40.5MPa, observe under the different pressure reduction of uniform temp the deposition process of separating out form, sulphur, the growth course of sulphur crystal on N80-1 carbon steel coupon of sulphur in visualization device 14, and gather experiment picture by connected computing machine 19, utilize sulfur recovery unit 24 and gas treatment equipment 25 to process experiment residual gas;
S515, the pressure that resets backpressure pump 20 are respectively 30MPa, 20MPa, change visualization device 14 endpiece pressure, and the sulphur deposition situation of wellbore hole simulator diverse location, repeats experimental procedure S1 ~ S3, carries out many group experiments;
embodiment 2:
The sulphur deposition in wellhole microcosmic visualized experiment method of the sulphur deposition in wellhole visual experimental apparatus described in described employing, it comprises the following steps:
S1, use alcohol, sherwood oil clean intermediate receptacle 3 and all experiment pipelines thereof;
S2, due to the gas sample of fetching from scene, its temperature and pressure is compared with the existing larger variation of formation condition, cause gas sample phase to change, need in sample device 6, carry out according to prime stratum condition sample again, according to experiment needs, by prime stratum condition, a certain proportion of gaseous sample is injected to sample device 6;
S3, take the elemental sulfur powder of 5g, put into intermediate receptacle 3, and intermediate receptacle 3 is evacuated with vacuum pump 8; Then with supercharge pump to the interior supercharging of intermediate receptacle 3; Described sulphur deposition in wellhole visual experimental apparatus is connected, then close all valves;
S4, intermediate receptacle 3 is heated to 130 DEG C, and stablize 3～4 hours, open valve B5, valve C7, valve E10, by the gas inject intermediate receptacle 3 in sample device 6, after container inner pressure is stable, stop injecting valve-off B5, valve C7, valve E10, regulate the temperature of Multifunctional oven 29 to 150 DEG C of the temperature in wellbore of required simulation, and stablize 3～4 hours;
Sulphur deposition in wellhole microcosmic visualized experiment step when S5, closing well, it comprises following sub-step:
The pressure of S521, setting backpressure pump 20 is 40MPa, open valve A2, valve E10, valve G13, valve H17, valve F21, valve I26, the pressure of setting constant speed and constant pressure pump 1 is 40.1MPa, gas sample in the slow displacement intermediate receptacle 3 of constant speed and constant pressure pump 1, gas reduces pressure by visualization device 14 and by throttling valve 23, keeps steady flow certain hour;
S522, valve-off A2, valve E10, valve G13, valve H17, simulation closing well state well-sinking sulphur deposition, within a certain period of time, utilize high-power microscope 15 and visualization window 16 to observe the deposition process of separating out form, sulphur of sulphur in visualization device 14, the growth course of sulphur crystal on N80-1 carbon steel coupon, and gather experiment picture by connected computing machine 19.
Above two examples are simulated opening well and making production and closing well state well-sinking sulphur deposition process respectively, have realized the Real Time Observation of different production system well-sinking sulphur deposition microprocesses.
Claims (4)
1. sulphur deposition in wellhole visual experimental apparatus, it is characterized in that: it comprises displacement system, sulphur deposition in wellhole simulation system, image capturing system and exhaust treatment system, described displacement system comprises constant speed and constant pressure pump (1), intermediate receptacle (3), gas inject pump (4), sample device (6), vacuum pump (8), backpressure pump (20), check valve (22) and throttling valve (23), the outlet of constant speed and constant pressure pump (1) connects end entrance under intermediate receptacle (3) by pipeline, connect on the outlet of constant speed and constant pressure pump (1) and the pipeline of the lower end entrance of intermediate receptacle (3) and be provided with valve A(2), the outlet of gas inject pump (4) connects the entrance of sample device (6) by pipeline, on the pipeline of the outlet of connection gas inject pump (4) and the entrance of sample device (6), be provided with valve B(5), the endpiece of vacuum pump (8) is connected with the upper end entrance of intermediate receptacle (3) by pipeline, the upper end entrance of the outlet of sample device (6) and intermediate receptacle (3) is all connected with the entrance point of sulphur deposition in wellhole simulation system by pipeline A, the outlet of sample device (6) is provided with valve C(7), the endpiece of vacuum pump (8) is provided with valve D(9), the upper end entrance of intermediate receptacle (3) is provided with valve E(10), the endpiece of sulphur deposition in wellhole simulation system is connected by pipeline with the inlet end of check valve (22), the endpiece of check valve (22) is connected with the inlet end of throttling valve (23) by pipeline, check valve (22) is connected by pipeline with backpressure pump (20), and on the pipeline of connection check valve (22) and backpressure pump (20), be provided with valve F(21),
Described pit shaft deposition simulation system comprises visualization device (14), visualization window (16), support (28) and Multifunctional oven (29), intermediate receptacle (3), visualization device (14) and support (28) are all arranged in Multifunctional oven (29), visualization window (16) is arranged on the body of Multifunctional oven (29) and is positioned at the top of Multifunctional oven (29), visualization device (14) is supported to Multifunctional oven (29) top by support (28), and align with visualization window (16) in the center of visualization device (14), the inlet end of visualization device (14) is connected with the outlet of intermediate receptacle (3) upper end by pipeline A, the endpiece of visualization device (14) is connected with the inlet end of check valve (22) by pipeline, the inlet end of visualization device (14) is respectively arranged with tensimeter A(11) and valve G(13), the endpiece of visualization device (14) is respectively arranged with valve H(17) and tensimeter B(18),
Described image capturing system comprises high-power microscope (15) and computing machine (19), high-power microscope (15) be placed in visualization window (16) directly over, computing machine (19) is connected with the output terminal of high-power microscope (15) by data line;
Described exhaust treatment system comprises sulfur recovery unit (24), gas treatment equipment (25) and exhaust fan, the inlet end of sulfur recovery unit (24) is connected with the endpiece of throttling valve (23) by pipeline, the endpiece of sulfur recovery unit (24) is connected with the inlet end of gas treatment equipment (25) by pipeline, the endpiece of gas treatment equipment (25) is connected with exhaust fan by pipeline, and the endpiece of gas treatment equipment (25) is provided with valve I(26).
2. sulphur deposition in wellhole visual experimental apparatus according to claim 1, it is characterized in that: described visualization device (14) by sapphire glass top cover (30), high pressure tempering side wall glass (31) and steel at the bottom of (33) surround, on high pressure tempering side wall glass (31), be symmetrically arranged with air intake opening (34) and gas outlet (32).
3. sulphur deposition in wellhole visual experimental apparatus according to claim 1, it is characterized in that: described visualization window (16) comprises taking over a business (36), chassis (37) and connecting hole A(38), take over a business (36) and chassis (37) and be provided with central through hole, the periphery that the top of taking over a business (36) is positioned at central through hole is provided with groove (35), in groove (35), place slide, connecting hole A runs through to take over a business (36) and chassis (37) successively, the top of baking oven is provided with top circular hole, on the peripheral baking oven of top circular hole, be drilled with and connecting hole A(38) the connecting hole B that matches, take over a business (36) and chassis (37) and be fixed by bolts to Multifunctional oven (29) top.
4. the sulphur deposition in wellhole microcosmic visualized experiment method that adopts sulphur deposition in wellhole visual experimental apparatus as claimed in claim 1, is characterized in that: it comprises the following steps:
S1, cleaning pipeline;
S2, in sample device (6), carry out sample again according to prime stratum condition, according to prime stratum condition, a certain proportion of gaseous sample is injected to sample device (6);
S3, claim elemental sulfur powder, put into intermediate receptacle (3), and intermediate receptacle (3) is evacuated with vacuum pump (8); Then with supercharge pump to the interior supercharging of intermediate receptacle (3); Then close all valves;
S4, intermediate receptacle (3) is heated to design temperature, and keep stable, open valve B(5), valve C(7), valve E(10), by the gas inject intermediate receptacle (3) in sample device (6), after container inner pressure is stable, stop injecting valve-off B(5), valve C(7), valve E(10), regulate the temperature of Multifunctional oven (29) to the temperature in wellbore of required simulation, and keep stable;
Sulphur deposition in wellhole microcosmic visualized experiment step when sulphur deposition in wellhole microcosmic visualized experiment step or closing well in S5, opening well and making production process;
In described opening well and making production process, sulphur deposition in wellhole microcosmic visualized experiment step comprises following sub-step:
S511, set the pressure of backpressure pump (20), open valve A(2), valve E(10), valve G(13), valve H(17), valve F(21), valve I(26), set the pressure of constant speed and constant pressure pump (1), gas sample in the slow displacement intermediate receptacle (3) of constant speed and constant pressure pump (1), gas is by visualization device (14) and by throttling valve (23) decompression, utilize high-power microscope (15) and visualization window (16) to observe the form of separating out of the middle sulphur of visualization device (14), the deposition process of sulphur, the growth course of sulphur crystal, and gather experiment picture by connected computing machine (19), utilize sulfur recovery unit (24) and gas treatment equipment (25) to process experiment residual gas,
S512, by Multifunctional oven (29) change temperature, observe the deposition process of separating out form, sulphur of the middle sulphur of visualization device (14) under same pressure differential condition of different temperatures, the growth course of sulphur crystal, and gather experiment picture by connected computing machine (19), utilize sulfur recovery unit (24) and gas treatment equipment (25) to process experiment residual gas;
S513, reset the temperature of Multifunctional oven (29), reach the temperature in wellbore of required simulation, and keep stable, repeating step S511;
S514, increase step by step the pressure of constant speed and constant pressure pump (1), observe the deposition process of separating out form, sulphur of the middle sulphur of visualization device (14) under the different pressure reduction of uniform temp, the growth course of sulphur crystal, and gather experiment picture by connected computing machine (19), utilize sulfur recovery unit (24) and gas treatment equipment (25) to process experiment residual gas;
S515, reset the pressure of backpressure pump (20), change visualization device (14) endpiece pressure, the sulphur deposition situation of wellbore hole simulator diverse location, repeats experimental procedure S1 ~ S3, carries out many group experiments;
When described closing well, sulphur deposition in wellhole microcosmic visualized experiment step comprises following sub-step:
The pressure of S521, setting backpressure pump (20), open valve A(2), valve E(10), valve G(13), valve H(17), valve F(21), valve I(26), set the pressure of constant speed and constant pressure pump (1), gas sample in the slow displacement intermediate receptacle (3) of constant speed and constant pressure pump (1), gas, by visualization device (14) and by throttling valve (23) decompression, keeps steady flow certain hour;
S522, valve-off A(2), valve E(10), valve G(13), valve H(17), simulation closing well state well-sinking sulphur deposition, utilize high-power microscope (15) and visualization window (16) to observe the deposition process of separating out form, sulphur of sulphur in visualization device (14), the growth course of sulphur crystal, and gather experiment picture by connected computing machine (19).
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