CN104062214B - Sulphur deposition in wellhole visual experimental apparatus and method - Google Patents
Sulphur deposition in wellhole visual experimental apparatus and method Download PDFInfo
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- CN104062214B CN104062214B CN201410244003.XA CN201410244003A CN104062214B CN 104062214 B CN104062214 B CN 104062214B CN 201410244003 A CN201410244003 A CN 201410244003A CN 104062214 B CN104062214 B CN 104062214B
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Abstract
The invention discloses sulphur deposition in wellhole visual experimental apparatus, it comprises displacement system, sulphur deposition in wellhole simulation system, image capturing system and exhaust treatment system, 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), pit shaft deposition simulation system comprises visualization device (14), visualization window (16), support (28) and Multifunctional oven (29), image capturing system comprises high-power microscope (15) and computing machine (19), also disclose the experimental technique adopting described experimental provision.The invention has the beneficial effects as follows: energy wellbore hole simulator working condition, realize the Real Time Observation that elemental sulfur in pit shaft separates out the whole micro dynamic course such as mode, elemental sulfur deposition, crystal growth micro dynamic course and deposition morphology.
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
Acid gas reservoir is widely distributed in the world.Along with deepening continuously of China's oil-gas field development, increasing high sulfur-bearing or extra-high sulfur Gas Fields find in China in succession.The sour gas reservoir of China is mainly distributed in Ordos Basin, the Sichuan Basin, Bohai gulf basin and Tarim Basin etc.Acid gas reservoir is the special gas reservoir of a class, because H in acid gas reservoir
2the existence of S, its physical property characteristic and conventional gas is made to have larger difference, and acid gas reservoir and the maximum difference of normal gas pools are just, in gas well recovery process, along with the change of temperature and pressure, can undergo phase transition, in gas, separate out elemental sulfur, when elemental sulfur can not be carried away by gas, sulphur depositional phenomenon will be produced.In acid gas reservoir recovery process, in stratum, pit shaft and uphole equipment, all may occur that sulphur deposits, and causes the blocking of gas channel, causes gas well deliverability sharply to decline, even stops production.The sulphur be deposited on pipeline also can cause corrosion and the destruction of tubing.Elemental sulfur deposition is in the wellbore ubiquitous difficulties in acid gas reservoir performance history, is one of bottleneck of restriction acid gas reservoir exploitation.At present, both at home and abroad on the deposition position of the dissolving of sulphur in rock gas and precipitation, sulphur, affect sulphur deposition factor etc. in have certain research, but lack precipitation mode to sulphur crystal, precipitation form and the intensive research of the growth pattern of sulphur on the borehole wall.Therefore, new requirement is proposed to sulphur deposition in wellhole experimental provision, comprising: 1) can wellbore conditions be characterized; 2) Real Time Observation of the precipitation mode of elemental sulfur in pit shaft, elemental sulfur deposition and crystal growth micro dynamic course, deposition morphology can be realized.Also there is no the device that can realize sulphur deposition in wellhole microcosmic visualized experiment at present.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, provide a kind of and realize elemental sulfur in pit shaft from precipitateing into the sulphur deposition in wellhole visual experimental apparatus and method that the whole micro dynamic course of growth deposition observes online.
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 intermediate receptacle lower inlet by pipeline, the pipeline of connection constant speed and constant pressure delivery side of pump and intermediate receptacle lower inlet is provided with valve A, gas inject delivery side of pump connects the entrance of sample device by pipeline, the pipeline of the entrance of connection gas inject delivery side of pump and sample device is provided with valve B, the endpiece of vacuum pump is connected with the upper end entrance of intermediate receptacle by pipeline, the outlet of sample device is all connected with the entrance point of sulphur deposition in wellhole simulation system by pipeline A with the upper end entrance of intermediate receptacle, 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 the pipeline of connection check valve and backpressure pump is provided with valve F.
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, the body that visualization window is arranged at Multifunctional oven is positioned at the top of Multifunctional oven, visualization device is supported to multi-function baking box top by support, and align with visualization window in the center of visualization device, the inlet end of visualization device is connected with intermediate receptacle upper end outlet 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, and high-power microscope is placed in directly over visualization window, and 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 by the bottom of sapphire glass top cover, high pressure tempering side wall glass and steel, and 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 and be provided with central through hole with chassis, the periphery that the top of taking over a business is positioned at central through hole is provided with groove, slide is placed in groove, connecting hole A runs through to take over a business and chassis successively, the top of baking oven is provided with top circular hole, the baking oven of the periphery of top circular hole is drilled with the connecting hole B matched with connecting hole A, takes over a business and be fixed by bolts to multi-function baking box top with chassis.
The sulphur deposition in wellhole microcosmic visualized experiment method of the sulphur deposition in wellhole visual experimental apparatus described in employing, 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 sample device;
S3, title elemental sulfur powder, put into intermediate receptacle, and be evacuated by intermediate receptacle with vacuum pump; Then with supercharge pump to supercharging in intermediate receptacle; Then all valves are closed;
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 in wellbore of temperature to required simulation of Multifunctional oven, 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, the pressure of setting constant speed and constant pressure pump, gas sample in the slow displacement intermediate receptacle of constant speed and constant pressure pump, gas is by visualization device and reduced pressure by throttling valve, high-power microscope and visualization window is utilized to observe precipitation form, the deposition process of sulphur, the growth course of sulphur crystal of sulphur in visualization device, and test picture by connected computer acquisition, utilize sulfur recovery unit and gas treatment equipment to process experiment residual gas;
S512, change temperature by Multifunctional oven, observe precipitation form, the deposition process of sulphur, the growth course of sulphur crystal of sulphur in visualization device under same pressure differential condition of different temperatures, and test picture by connected computer acquisition, 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, repeat step S511;
The pressure of S514, step by step increase constant speed and constant pressure pump, observe precipitation form, the deposition process of sulphur, the growth course of sulphur crystal of sulphur in visualization device under the different pressure reduction of identical temperature, and test picture by connected computer acquisition, utilize sulfur recovery unit and gas treatment equipment to process experiment residual gas;
S515, reset the pressure of backpressure pump, namely change visualization device outlet pressures, the sulphur deposition conditions of wellbore hole simulator diverse location, repeat experimental procedure S1 ~ S3, carry out organizing experiment more;
During 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, the pressure of setting constant speed and constant pressure pump, gas sample in the slow displacement intermediate receptacle of constant speed and constant pressure pump, gas is by visualization device and reduced pressure 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 precipitation form, the deposition process of sulphur, the growth course of sulphur crystal of sulphur in visualization device, and test picture by connected computer acquisition.
The present invention has the following advantages: energy wellbore hole simulator condition of the present invention, realize the Real Time Observation of the precipitation mode of elemental sulfur in pit shaft, elemental sulfur deposition and crystal growth micro dynamic course, deposition morphology, realize elemental sulfur in pit shaft from the online observation precipitateing into the whole micro dynamic course of growth deposition.
Accompanying drawing explanation
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 intermediate receptacle 3 lower inlet by pipeline, connect on the outlet of constant speed and constant pressure pump 1 and the pipeline of intermediate receptacle 3 lower inlet and be provided with valve A2, the outlet of gas inject pump 4 connects the entrance of sample device 6 by pipeline, the pipeline of the outlet of connection gas inject pump 4 and the entrance of sample device 6 is provided with valve B5, the endpiece of vacuum pump 8 is connected with the upper end entrance of intermediate receptacle 3 by pipeline, the outlet of sample device 6 is all connected with the entrance point of sulphur deposition in wellhole simulation system by pipeline A with the upper end entrance of intermediate receptacle 3, namely 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 by the inlet end of pipeline with throttling valve 23, check valve 22 is connected by pipeline with backpressure pump 20, and connection check valve 22 and the pipeline of backpressure pump 20 are provided with valve F21,
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, is driven the piston of intermediate receptacle 3 by constant speed and constant pressure pump 1, will be placed in the sour gas sample displacement of intermediate receptacle 3 to sulphur deposition in wellhole simulation system; Gas inject pump 4, for by the gas inject intermediate receptacle 3 in 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 for being evacuated in intermediate receptacle 3, Exhaust Gas; Backpressure pump 20 and check valve 22 can control the output end pressure of sulphur deposition in wellhole simulation system; Throttling valve 23 can control 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, the body that visualization window 16 is arranged at Multifunctional oven 29 is positioned at the top of Multifunctional oven 29, the circular hole of certain size is opened at Multifunctional oven 29 top, visualization window 16 is placed in Multifunctional oven 29 outer circle hole, seal fixing with 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 intermediate receptacle 3 upper end outlet by pipeline A, the endpiece of visualization device 14 is connected by the inlet end of pipeline with check valve 22, 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 observed and shooting sulphur deposition process for online outside Multifunctional oven 29, support 28 is for being fixed on Multifunctional oven 29 top by visualization device 14, Multifunctional oven 29 is for providing temperature in wellbore condition for test,
Described image capturing system comprises high-power microscope 15 and computing machine 19, high-power microscope 15 is placed in directly over visualization window 16, high-power microscope 15 is fixedly installed in the top of Multifunctional oven 29 by microscope stand 12, and computing machine 19 is connected by the output terminal of data line with high-power microscope 15.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: precipitation mode, the elemental sulfur of elemental sulfur deposit and crystal growth micro dynamic course, deposition morphology etc.
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 by the endpiece of pipeline with throttling valve 23, the endpiece of sulfur recovery unit 24 is connected by the inlet end of pipeline with gas treatment equipment 25, 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.Sulfur recovery unit 24 li is equipped with the chemical reagent such as toluene, for the recovery of sulphur in waste gas; Gas treatment equipment 25, for processing waste gas, reduces environmental pollution.Exhaust fan is used for the gas processed to be discharged in air.
As shown in Figure 2, described visualization device 14, by 33 surrounding at the bottom of sapphire glass top cover 30, high pressure tempering side wall glass 31 and steel, high pressure tempering side wall glass 31 is symmetrically arranged with air intake opening 34 and gas outlet 32.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 at the bottom of N80-1 steel, 33, four sides are high pressure tempered glass, 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, the periphery that the top of taking over a business 36 is positioned at central through hole is provided with groove 35, slide is placed in 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, the baking oven of the periphery of top circular hole is drilled with the connecting hole B matched with connecting hole A38, take over a business 36 and chassis 37 be fixed by bolts to Multifunctional oven 29 top.Groove 35, at Multifunctional oven 29 top Near Circular Hole In A, drills Multifunctional oven 29 top 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 hole.
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 cleaning intermediate receptacle 3 and all experiment pipelines thereof;
S2, gas sample owing to fetching from scene, the comparatively existing larger change of formation condition of its temperature and pressure, gas sample phase is caused to change, need in sample device 6, to carry out sample again according to prime stratum condition, experimentally need, by prime stratum condition, a certain proportion of gaseous sample is injected sample device 6;
S3, take the elemental sulfur powder of 5g, put into intermediate receptacle 3, and with vacuum pump 8, intermediate receptacle 3 is evacuated; Then with supercharge pump to supercharging in intermediate receptacle 3; Described sulphur deposition in wellhole visual experimental apparatus is connected, then closes 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 the temperature in wellbore 150 DEG C of simulation, 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 is by visualization device 14 and reduced pressure by throttling valve 23, high-power microscope 15 and visualization window 16 is utilized to observe the precipitation form 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, sulfur recovery unit 24 and gas treatment equipment 25 is utilized to process experiment residual gas,
S512, change temperature by Multifunctional oven 29, arranging step-length is 5 DEG C, observe precipitation form, the deposition process of sulphur, the growth course of sulphur crystal of sulphur in visualization device 14 under same pressure differential condition of different temperatures, 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 150 DEG C of required simulation, and keep stable, repeat step S511, namely the pressure 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 is by visualization device 14 and reduced pressure by throttling valve 23, high-power microscope 15 and visualization window 16 is utilized to observe the precipitation form 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, sulfur recovery unit 24 and gas treatment equipment 25 is utilized to process experiment residual gas,
The pressure of S514, step by step increase constant speed and constant pressure pump 1, the registration difference of tensimeter A11 and tensimeter B18 is changed between 0.1MPa ~ 0.5MPa, such as 40.2MPa, 40.3MPa, 40.4MPa, 40.5MPa, observe precipitation form, the deposition process of sulphur, the growth course of sulphur crystal on N80-1 carbon steel coupon of sulphur in visualization device 14 under the different pressure reduction of identical temperature, 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 resetting backpressure pump 20 are respectively 30MPa, 20MPa, namely change visualization device 14 outlet pressures, the sulphur deposition conditions of wellbore hole simulator diverse location, repeat experimental procedure S1 ~ S3, carry out organizing experiment more;
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 cleaning intermediate receptacle 3 and all experiment pipelines thereof;
S2, gas sample owing to fetching from scene, the comparatively existing larger change of formation condition of its temperature and pressure, gas sample phase is caused to change, need in sample device 6, to carry out sample again according to prime stratum condition, experimentally need, by prime stratum condition, a certain proportion of gaseous sample is injected sample device 6;
S3, take the elemental sulfur powder of 5g, put into intermediate receptacle 3, and with vacuum pump 8, intermediate receptacle 3 is evacuated; Then with supercharge pump to supercharging in intermediate receptacle 3; Described sulphur deposition in wellhole visual experimental apparatus is connected, then closes 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 in wellbore 150 DEG C of temperature to required simulation of Multifunctional oven 29, 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 is by visualization device 14 and reduced pressure 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 precipitation form, the deposition process of 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.
Above two examples are simulated opening well and making production and closing well state well-sinking sulphur deposition process respectively, achieve the Real Time Observation of different production system well-sinking sulphur deposition microprocess.
Claims (3)
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 intermediate receptacle (3) lower inlet by pipeline, connect on the outlet of constant speed and constant pressure pump (1) and the pipeline of intermediate receptacle (3) lower inlet and be provided with valve A(2), the outlet of gas inject pump (4) connects the entrance of sample device (6) by pipeline, the pipeline of the outlet of connection gas inject pump (4) and the entrance of sample device (6) is provided with valve B(5), the endpiece of vacuum pump (8) is connected by the upper end entrance of pipeline with intermediate receptacle (3), the outlet of sample device (6) is all connected with the entrance point of sulphur deposition in wellhole simulation system by pipeline A with the upper end entrance of intermediate receptacle (3), 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 by the inlet end of pipeline with throttling valve (23), check valve (22) is connected by pipeline with backpressure pump (20), and connection check valve (22) and the pipeline of backpressure pump (20) are 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), the body that visualization window (16) is arranged at Multifunctional oven (29) 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 intermediate receptacle (3) upper end outlet by pipeline A, the endpiece of visualization device (14) is connected by the inlet end of pipeline with check valve (22), 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), and high-power microscope (15) is placed in directly over visualization window (16), and computing machine (19) is connected by the output terminal of data line with high-power microscope (15);
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 by the endpiece of pipeline with throttling valve (23), the endpiece of sulfur recovery unit (24) is connected by the inlet end of pipeline with gas treatment equipment (25), 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);
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) are 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), slide is placed in groove (35), 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, the baking oven of the periphery of top circular hole is drilled with and connecting hole A(38) the connecting hole B that matches, take over a business (36) and chassis (37) are fixed by bolts to Multifunctional oven (29) top.
2. sulphur deposition in wellhole visual experimental apparatus according to claim 1, it is characterized in that: described visualization device (14) is surrounded by (33) at the bottom of sapphire glass top cover (30), high pressure tempering side wall glass (31) and steel, high pressure tempering side wall glass (31) is symmetrically arranged with air intake opening (34) and gas outlet (32).
3. adopt the sulphur deposition in wellhole microcosmic visualized experiment method of sulphur deposition in wellhole visual experimental apparatus as claimed in claim 1, it 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 sample device (6);
S3, title elemental sulfur powder, put into intermediate receptacle (3), and be evacuated by intermediate receptacle (3) with vacuum pump (8); Then with supercharge pump to intermediate receptacle (3) interior supercharging; Then all valves are closed;
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 in wellbore of temperature to required simulation of Multifunctional oven (29), 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, the pressure of setting backpressure pump (20), open valve A(2), valve E(10), valve G(13), valve H(17), valve F(21), valve I(26), the pressure of setting 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, high-power microscope (15) and visualization window (16) is utilized to observe the precipitation form of sulphur in visualization device (14), the deposition process of sulphur, the growth course of sulphur crystal, and gather experiment picture by connected computing machine (19), sulfur recovery unit (24) and gas treatment equipment (25) is utilized to process experiment residual gas,
S512, by Multifunctional oven (29) change temperature, precipitation form, the deposition process of sulphur, the growth course of sulphur crystal of the middle sulphur of visualization device (14) under observation same pressure differential condition of different temperatures, 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, repeat step S511;
The pressure of S514, increase constant speed and constant pressure pump (1) step by step, observe precipitation form, the deposition process of sulphur, the growth course of sulphur crystal of sulphur in visualization device (14) under the different pressure reduction of identical temperature, 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), namely change visualization device (14) outlet pressures, the sulphur deposition conditions of wellbore hole simulator diverse location, repeat experimental procedure S1 ~ S3, carry out organizing experiment more;
During 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), the pressure of setting 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 passes through 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 precipitation form, the deposition process of sulphur, the growth course of sulphur crystal of sulphur in visualization device (14), and gather experiment picture by connected computing machine (19).
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| CN104483227A (en) * | 2014-12-12 | 2015-04-01 | 西南石油大学 | Sulfur deposition device based on magnetic suspension balance |
| CN109060616B (en) * | 2018-07-23 | 2021-02-02 | 西南石油大学 | High-precision visual testing device and method for pit shaft sulfur deposition influence factors |
| CN110905457B (en) * | 2018-08-27 | 2024-04-30 | 中国石油天然气股份有限公司 | CO2Device and method for simulating scaling of gas-driven shaft |
| CN111044427B (en) * | 2018-10-15 | 2022-08-30 | 中国石油天然气股份有限公司 | Core sulfur analysis system |
| CN110346403B (en) * | 2019-08-15 | 2020-12-08 | 西南石油大学 | Visual fluid phase change observation device and method |
| CN111899624A (en) * | 2020-06-30 | 2020-11-06 | 河海大学 | Device and method for simulating influence of external environment change on occurrence of sulfur element in sediment |
| CN111794729B (en) * | 2020-08-13 | 2022-09-30 | 重庆科技学院 | Sulfur-containing gas well production simulation device and method based on fixed-yield production |
| CN112014261B (en) * | 2020-09-04 | 2022-04-26 | 西南石油大学 | Device and method for measuring content of adsorbed sulfur based on solvent dissolution principle |
| CN112945812B (en) * | 2021-01-31 | 2022-06-07 | 西南石油大学 | Sulfur deposition testing device for sulfur-containing natural gas gathering and transportation pipeline |
| CN113310876B (en) * | 2021-06-01 | 2022-02-01 | 西南石油大学 | High-temperature high-pressure sulfur deposition microscopic seepage visual experiment device and method |
| CN114624419B (en) * | 2022-03-15 | 2023-10-10 | 广东石油化工学院 | Visual development simulation device and experimental method for hydrate |
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