CN210239658U

CN210239658U - Elemental sulfur deposition simulation device for high-sulfur-content gas

Info

Publication number: CN210239658U
Application number: CN201921415759.0U
Authority: CN
Inventors: Zhichao Yang; 杨智超; Jianyi Liu; 刘建仪
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-04-03
Anticipated expiration: 2029-08-29

Abstract

The utility model discloses a high sulphur gas element sulphur deposit analogue means that contains relates to high sulphur gas reservoir development technical field. Including containing sulphur gas pitcher, booster pump and tail gas absorption tank, contain sulphur gas pitcher and connect gradually booster pump, pressure-cooker, step-down deposition system and tail gas absorption tank, step-down deposition system is equipped with the array, can take the connected mode parallelly connected or establish ties as required, step-down deposition system is including the backpressure valve and the sedimentation tank that connect gradually, the backpressure valve is connected with the backpressure valve controller, pressure-cooker one end still is equipped with the pressurization case, the pressurization case is divided into two parts about by the piston, the incasement left side of pressurizing is equipped with the dog, pressurization case left side still is connected with pressure equipment, and pressure equipment passes through the piston and pressurizes to the high sulphur gas that contains in the pressure-cooker, can measure the deposit law of sulphur gas under the temperature, the pressure condition of difference through this device, guides for the development that the high sulphur gas is stored.

Description

Elemental sulfur deposition simulation device for high-sulfur-content gas

Technical Field

The utility model relates to a high sulphur gas reservoir development technical field, concretely relates to high sulphur gas element sulphur deposit analogue means that contains.

Background

The high sulfur content gas reservoir is a special gas reservoir, and the special reaction of the high sulfur content gas reservoir is in many aspects, wherein sulfur deposition is considered to be one of three major problems in the development of the high sulfur content gas reservoir. The sulfur deposition process is a complex process, when the elemental sulfur dissolved in the sulfur-containing acid gas reaches saturation, the solubility of the elemental sulfur in the acid gas is reduced along with the reduction of pressure and temperature, the elemental sulfur is precipitated, if the temperature is higher than the freezing point of the elemental sulfur under the pressure, the precipitated sulfur is in a liquid state, the liquid elemental sulfur can be carried out of the stratum by the high-speed airflow, the influence on the stratum is avoided, if the temperature of the stratum is lower than the freezing point of the sulfur, the precipitated sulfur is solid particles, one part of the precipitated sulfur particles move along with the airflow, the other part of the precipitated sulfur particles are deposited on the surfaces of pores, the sulfur particles deposited on the surfaces of the pores occupy the space of the pores, the pore structure of the stratum is changed, the permeability of the stratum is changed, the productivity of a gas well is influenced, the stratum is seriously blocked. Actually, sulfur deposition is a process of dissolving, separating out, transporting and depositing elemental sulfur in a sour gas containing sulfur, and a sulfur deposition phenomenon is generated when separated solid sulfur cannot be carried and transported by gas, so that pore throats are blocked, stratums are damaged, and the productivity of a high-sulfur-containing gas well is seriously influenced.

Chinese patent CN 104483227A discloses a sulfur deposition device based on a magnetic suspension balance, which can realize the simulation of a real stratum high-temperature high-pressure high-sulfur-containing environment, greatly improve the test precision of the sulfur deposition amount, calculate the viscosity, the volume coefficient and the deviation factor of gas in real time, and measure the dynamic change of the permeability of a rock core caused by sulfur deposition in real time on line; chinese patent CN 206638565U discloses an experimental apparatus for evaluating the damage of sulfur deposition in a high-sulfur-content gas reservoir to a fractured reservoir, which monitors the flow of high-sulfur-content gas passing through a fractured rock sample by simulating a high-temperature and high-pressure environment of the stratum, and can quickly and accurately evaluate the damage degree of the sulfur deposition to the fractured rock sample.

However, the above technical solutions do not consider the deposition of sulfur in the high sulfur-containing gas during the temperature and pressure variation process.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problem, an object of the present invention is to provide a high sulfur content gas element sulfur deposition simulation apparatus, which provides an apparatus for implementing sulfur deposition experiment under different temperature and pressure environments.

The utility model adopts the following technical scheme:

the utility model provides a high sulphur gas element sulphur deposit analogue means that contains, including containing sulphur gas pitcher, booster pump and tail gas absorption tank, contain sulphur gas pitcher and connect gradually booster pump, pressure-reducing deposition system and tail gas absorption tank, pressure-reducing deposition system is equipped with the array, can take the connected mode parallelly connected or establish ties as required, pressure-reducing deposition system is including the backpressure valve and the sedimentation tank that connect gradually, the backpressure valve is connected with the backpressure valve controller, pressure-increasing tank one end still is equipped with the pressurization case, the pressurization case is divided into left and right sides two parts by the piston, the pressurization incasement left side is equipped with the dog, pressurization case left side still is connected with the pressurized equipment, and the pressurized equipment passes through the piston and pressurizes to the high sulphur gas that contains in the pressure-increasing tank, and the pressurized equipment is one of hydraulic equipment or atmospheric pressure equipment.

Furthermore, the high-pressure tank is arranged in the constant temperature box, the heat exchange layer is arranged outside the deposition tank, the pipelines between the high-pressure tank and the deposition tank and the pipelines between the depressurization deposition systems are both provided with heat insulation layers, and the high-pressure tank and the deposition tank are both provided with temperature sensors.

Furthermore, the deposition tank is filled with absorbent cotton and used for collecting the elemental sulfur deposited due to pressure and temperature changes, the elemental sulfur deposited on the absorbent cotton is easy to take out and observe, the crystal form and the structure of the elemental sulfur are not easy to damage, and the deposited elemental sulfur is convenient to further observe.

Furthermore, be equipped with the valve between booster pump and the high-pressure tank, be equipped with the valve between high-pressure tank and the back pressure valve.

Furthermore, a pressure gauge is arranged on the high-pressure tank, and the pressure gauge is arranged on the left part of the pressurizing box.

Furthermore, a sampling branch pipe is arranged on the high-pressure tank, and a sampling branch pipe is arranged on an outlet pipe of the sedimentation tank.

Furthermore, the pressure tank all is equipped with the pressure release pipeline of connecting the tail gas absorption jar, all be equipped with the flowmeter on the pressure release pipeline.

Furthermore, the booster pump is also connected with a nitrogen tank for purging the whole equipment after the test is completed, so that the potential safety hazard caused by hydrogen sulfide during the disassembly of the equipment is reduced.

The utility model has the advantages that:

by arranging a plurality of depressurization deposition systems, the sulfur deposition conditions of the sulfur-containing gas under different temperature and pressure conditions are simulated, so that the deposition rule of the sulfur-containing gas under different temperature and pressure conditions is obtained, and theoretical guidance is provided for the development of a high sulfur-containing gas reservoir; through setting up the absorbent cotton in the sedimentation tank for sedimentary elemental sulphur adsorbs on the absorbent cotton, when carrying out further analysis to elemental sulphur, is difficult for destroying crystal form, the structure of sedimentary sulphur itself, makes technical support for perfecting the high sulphur gas deposit sulphur deposit's theory.

Drawings

FIG. 1 is a general schematic view of the present invention;

in the figure, 1, a pressurizing tank, 2, a high-pressure tank, 3, a deposition tank, 4, a sulfur-containing gas tank, 5, a tail gas absorption tank, 6, a pressurizing pump, 7, a piston, 8, a stop block, 9, a back pressure valve, 10, a back pressure valve controller, 11, a constant temperature box, 12, a pressure gauge, 13, a sampling branch pipe, 14, absorbent cotton, 15, pressurizing equipment, 16, a heat exchange layer, 17, a temperature sensor, 18, a nitrogen tank, 19 and a flowmeter.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

Example (b):

the utility model provides a high sulphur gas element sulphur deposit analogue means that contains, include nitrogen gas jar 18 and the sulphur gas pitcher 4 that the parallel connection set up, nitrogen gas jar 18 and the 4 exports of sulphur gas pitcher connect gradually the booster pump 6, high-pressure tank 2, step-down deposition system and tail gas absorption tank 5, step-down deposition system is equipped with the array, back pressure valve 9 and sedimentation tank 3 including connecting gradually, back pressure valve 9 is connected with back

pressure valve controller

10, 3 intussuseption of sedimentation tank are filled with

cotton wool

14, 2 one end of high-pressure tank still are equipped with pressurization case 1, pressurization case 1 is cut apart into by piston 7 and is controlled two parts, pressurization case 1 is equipped with dog 8 in the left side, pressurization case 1 left side still is connected with hydraulic pressure.

In thermostated container 11 was located to

pressure vessel

2, 3 external heat exchange layers 16 that are equipped with of sedimentation tank, all be equipped with the heat preservation on the pipeline between pipeline, the step-down deposition system between pressure vessel 2 and the sedimentation tank 3, all be equipped with temperature sensor 17 on pressure vessel 2 and the sedimentation tank 3, be equipped with the valve between booster pump 6 and the pressure vessel 2, be equipped with the valve between pressure vessel 2 and the back pressure valve 9. Be equipped with manometer 12 on the high-pressure tank 2, 1 left part of pressurized tank is equipped with manometer 12, is equipped with sample branch pipe 13 on the high-pressure tank 2, is equipped with sample branch pipe 13 on the 3 outlet pipes of sedimentation tank, and pressurized tank 1 all is equipped with the pressure release pipeline of connecting tail gas absorption tank 5, all is equipped with flowmeter 19 on the pressure release pipeline.

The utility model discloses during the use, divide into 2 stages.

Simulating sulfur deposition in a formation pressure gas production stage: close the valve between high-pressure tank 2 and the backpressure valve 9, open booster pump 6, carry the sulphur gas who contains in the sulphur gas jar 4 to high-pressure tank 2 and pressure boost to the stratum initial pressure, close the valve between booster pump 6 and high-pressure tank 2, set up the temperature of thermostated container 11, and set up the pressure that each backpressure valve 9 corresponds, heat exchange layer 16's temperature on each deposition tank 3, when treating that the temperature rises to the settlement temperature, open the valve between high-pressure tank 2 and the backpressure valve 9, make sulphur gas get into after each deposition tank 3, from the pressure release pipeline entering hydrogen sulfide absorption tank 5 of last deposition tank 3.

Simulating sulfur deposition in water injection or gas injection displacement stage: when the pressure in the high-pressure tank 2 is reduced to be lower than the set pressure of the back-pressure valve 9 directly connected with the high-pressure tank 2 or the flowmeter 19 has no flow value, the sulfur-containing gas in the high-pressure tank 2 needs to be pressurized at the moment, the hydraulic pressurizing equipment 15 is opened, pressurization is carried out at a certain pressurization speed, when the numerical value of the pressure gauge 12 on the high-pressure tank 2 reaches the simulated displacement pressure, pressurization is stopped, whether the flowmeter 19 has flow or not is observed, and the flow test of the flowmeter 19 is finished.

In the experimental process, if the sulfur deposition condition in the test needs to be monitored, sampling from each sampling branch pipe 13 at intervals to measure the content of hydrogen sulfide, and if the displacement needs to be simulated for multiple times, pressurizing for multiple times through a hydraulic pressurizing device 15; if it is desired to simulate the sulfur deposition of a high sulfur containing gas under aqueous conditions, a quantity of formation water may be added to the bomb 2.

After the experiment is finished, the nitrogen in the nitrogen tank 18 is used for purging the hydrogen sulfide in the whole device, so that the influence of the hydrogen sulfide gas in the device on the body health of experimenters when the device is opened is prevented. After the experiment was completed, the absorbent cotton 14 in each of the settling tanks 3 was taken out to further analyze the deposited sulfur attached to the absorbent cotton 14.

In order to ensure that sulfur deposition cannot happen in time due to the fact that the flow speed of sulfur-containing gas is too fast in the experimental process, the valve between the high-pressure tank 2 and the back-pressure valve 9 is controlled to be in a small opening degree.

In the description of the present invention, it should be noted that the terms "left", "right", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims

1. The utility model provides a high sulphur gas element sulphur deposit analogue means that contains, including containing sulphur gas pitcher, booster pump and tail gas absorption tank, its characterized in that, contain sulphur gas pitcher and connect gradually booster pump, pressure-cooker, step-down deposition system and tail gas absorption tank, step-down deposition system is equipped with the array, including the back pressure valve and the deposition tank that connect gradually, the back pressure valve is connected with the back pressure valve controller, pressure-cooker one end still is equipped with the case that adds, the case that adds is divided into two parts about by the piston, it is equipped with the dog to add the incasement left side, it still is connected with compression equipment to add the case left side.

2. The elemental sulfur deposition simulation device of claim 1, wherein the high-pressure tank is disposed in a thermostat, a heat exchange layer is disposed outside the deposition tank, and an insulating layer is disposed on a pipeline between the high-pressure tank and the deposition tank and a pipeline between the depressurization deposition systems.

3. The elemental sulfur deposition simulation apparatus of claim 2, wherein the high-pressure tank and the deposition tank are provided with temperature sensors.

4. The elemental sulfur deposition simulation device according to claim 1, wherein the deposition tank is filled with absorbent cotton.

5. The elemental sulfur deposition modeling apparatus of claim 1 wherein a valve is located between said booster pump and said high pressure tank, and a valve is located between said high pressure tank and said back pressure valve.

6. The elemental sulfur deposition simulation apparatus according to claim 1, wherein a pressure gauge is provided on the high pressure tank, and a pressure gauge is provided on the left portion of the pressure tank.

7. The elemental sulfur deposition simulation apparatus according to claim 1, wherein a sampling branch pipe is provided on the high-pressure tank, and a sampling branch pipe is provided on an outlet pipe of the deposition tank.

8. The elemental sulfur deposition simulation device according to claim 1, wherein the pressure tanks are provided with pressure relief lines connected to the tail gas absorption tank, and the pressure relief lines are provided with flow meters.

9. The elemental sulfur deposition simulation apparatus of claim 1 wherein a nitrogen tank is further connected to the booster pump.