CN210153558U - Simulation device for long-distance pipeline - Google Patents
Simulation device for long-distance pipeline Download PDFInfo
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- CN210153558U CN210153558U CN201920914331.4U CN201920914331U CN210153558U CN 210153558 U CN210153558 U CN 210153558U CN 201920914331 U CN201920914331 U CN 201920914331U CN 210153558 U CN210153558 U CN 210153558U
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Abstract
The utility model provides a long-distance pipeline's analogue means, through designing analogue means to application flow simulation software HYSYS simulates analogue means, monitors the actual running state of pipeline, carries out analog computation to the data of monitoring through HYSYS software, obtains fluidic flow, temperature, pressure and natural gas component etc. simulation result, and the simulation result plays to guide and regulate and control the effect to actual production, especially has important guide meaning to the equipment lectotype of low reaches natural gas secondary processing.
Description
Technical Field
The utility model belongs to the defeated field of natural gas collection, concretely relates to analogue means of long defeated pipeline, in particular to analogue means of long defeated pipeline of natural gas.
Background
The long-distance pipeline refers to a pipeline used for conveying commodity medium in a production place, a storage house and a unit using room. Generally, natural gas produced by a gas well is intensively conveyed to a gas collecting station through a long-distance pipeline, the gas collecting station is intensively conveyed to a purification plant for treatment after being collected, before the natural gas is purified, adjacent production processes are mutually conditioned, and the aspects of working parameters, running states, production safety and the like are mutually related and mutually influenced, and the former process is a necessary condition for realizing the latter process when the former process is normally and smoothly carried out and the expected requirement is met.
The natural gas gathering and transportation is completed through a gathering and transportation pipe network (the gathering and transportation pipe network is a large-area net-shaped pipeline structure formed by metal or nonmetal pipelines with different pipe diameters and different wall thicknesses), the natural gas gathering and transportation pipe network is a net-shaped pipeline system formed by a gas production pipeline from a gas well mouth to a gas collecting station and a feed gas conveying pipeline from the gas collecting station, a single well station to a natural gas treatment plant (including a natural gas purification plant) in a gas field or a certain gas production area, and the net-shaped pipeline system is an essential production facility in the ground production process of natural gas.
In natural gas gathering and transportation, because a gathering and transportation pipe network lacks of a simulation device and simulation calculation, the flow, temperature and pressure of fluid cannot be accurately obtained in the gathering and transportation process, and even in pipe transportation, due to the fact that the temperature in a pipeline is reduced, hydrates are generated, and equipment such as a downstream compressor and a heat exchanger are seriously influenced.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a simulation apparatus and a simulation method for a long distance pipeline, so as to overcome the above technical defects.
In order to solve the technical problem, the utility model provides a long defeated pipeline's analogue means, its characterized in that: the gas well comprises four groups of gas wells, namely a first gas well, a second gas well, a third gas well and a fourth gas well;
the well head of the first gas well is connected with the inlet end of the first gas transmission pipeline, the well head of the second gas well is connected with the inlet end of the second gas transmission pipeline, the well head of the third gas well is connected with the inlet end of the third gas transmission pipeline, and the fourth gas well is connected with the inlet end of the fourth gas transmission pipeline;
the outlet end of the first gas transmission pipeline and the outlet end of the second gas transmission pipeline are both connected to the inlet of the same gas gathering station A, the outlet of the gas gathering station A is connected with the inlet end of the mixing pipeline A, the outlet end of the mixing pipeline A and the outlet end of the third gas transmission pipeline are both connected to the inlet of the same gas gathering station B, the outlet of the gas gathering station B is connected with the inlet end of the mixing pipeline B, the outlet end of the mixing pipeline B and the outlet end of the fourth gas transmission pipeline are both connected to the inlet of the same gas gathering station C, the outlet of the gas gathering station C is connected with the inlet end of the mixing pipeline C, and the outlet end.
Preferably, the first gas pipeline is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 150 meters, the altitude is 645 meters, and the height difference is +6 meters; the length of the pipe section II is 125 meters, the altitude is 636.5 meters, and the altitude difference is-8.5 meters; the length of the pipe section III is 100 meters, the altitude is 637 meters, and the height difference is +0.5 meter; the ground surface burial depths of the three pipe sections are all 1 meter.
Further, the second gas pipeline consists of a pipe section, the length of the pipe section is 200 meters, the altitude is 637 meters, the altitude difference is +23 meters, and the ground surface burial depth is 1 meter.
Preferably, the third gas pipeline is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 160 meters, the altitude is 648 meters, and the height difference is +12.5 meters; the length of the pipe section II is 100 meters, the altitude is 634 meters, and the height difference is-14 meters; the length of the pipe section III is 205 meters, the altitude is 633 meters, and the height difference is-4 meters; the ground surface burial depths of the three pipe sections are all 1 meter.
Preferably, the fourth gas transmission pipeline is formed by connecting two pipe sections, wherein the length of the pipe section I is 180 meters, the altitude is 625 meters, and the elevation difference is-7.5 meters; the length of the pipe section II is 165 meters, the altitude is 617 meters, and the elevation difference is-8 meters; the ground surface burial depths of the two pipe sections are both 1 meter.
Further, the mixing pipeline A consists of a pipe section with the length of 355 meters, the altitude of 633 meters and the height difference of-1 meter; the buried depth of the ground surface of the pipe section is 1 meter.
Further, the mixing pipeline B consists of a pipe section, the length of the pipe section is 300 meters, the altitude is 617 meters, and the height difference is-16 meters; the buried depth of the ground surface of the pipe section is 1 meter.
Preferably, the mixing pipeline C consists of a pipe section, the length of the pipe section is 340 meters, the altitude is 604 meters, the elevation difference is-13 meters, and the surface burial depth of the pipe section is 1 meter.
The utility model has the advantages as follows: the utility model discloses a long-distance pipeline's analogue means, through designing analogue means, and utilize flow simulation software HYSYS to simulate analogue means, monitor the actual running state of pipeline, carry out analog computation to the data of monitoring through HYSYS software, through analog computation, obtain the fluid flow that each branch was come out, pressure, the simulation result such as the natural gas component of temperature and every branch, the simulation result plays to guide and regulate and control the effect to actual production, especially has important guide meaning to the equipment lectotype that low reaches natural gas secondary processing handled.
In order to make the above and other objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic structural diagram of a simulation device of a long-distance pipeline.
Description of reference numerals:
1. gas well number one; 2. a second gas well; 3. a third gas well; 4. a number four gas well; 5. a gas collecting station A; 6. a mixing line A; 7. a gas collecting station B; 8. a mixing line B; 9. a gas gathering station C; 10. a mixing line C; 11. a purification plant;
101. a gas line I; 201. a second gas line; 301. a third gas line; 401. gas line number four.
Detailed Description
The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.
It should be noted that, in the present invention, the upper, lower, left, and right in the drawings are regarded as the upper, lower, left, and right of the simulation apparatus for a long distance pipeline described in this specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the first embodiment of the utility model relates to a simulation device of a long-distance pipeline, which comprises four groups of gas wells, namely a gas well 1, a gas well 2, a gas well 3 and a gas well 4;
the wellhead of the first gas well 1 is connected with the inlet end of a first gas transmission pipeline 101, the wellhead of the second gas well 2 is connected with the inlet end of a second gas transmission pipeline 201, the wellhead of the third gas well 3 is connected with the inlet end of a third gas transmission pipeline 301, and the fourth gas well 4 is connected with the inlet end of a fourth gas transmission pipeline 401;
the outlet end of the first gas line 101 and the outlet end of the second gas line 201 are both connected to the inlet of the same gas station A5, the outlet of the gas station A5 is connected to the inlet end of a mixing line A6, the outlet end of the mixing line A6 and the outlet end of the third gas line 301 are both connected to the inlet of the same gas station B7, the outlet of the gas station B7 is connected to the inlet end of a mixing line B8, the outlet end of the mixing line B8 and the outlet end of the fourth gas line 401 are both connected to the inlet of the same gas station C9, the outlet of the gas station C9 is connected to the inlet end of the mixing line C10, and the outlet end of the mixing line C10 is connected to the purification plant.
The working process of the simulation device for the long conveying pipeline in the embodiment is as follows:
the natural gas produced by the four gas wells is transported through a first gas line 101, a second gas line 201, a third gas line 301 and a fourth gas line 401 respectively, specifically, the first gas line 101 and the second gas line 201 transport the natural gas to a gas collecting station A5 respectively, the natural gas sent by each gas well in the gas collecting station A5 is throttled and depressurized, free liquid and other mechanical impurities in the gas are separated, the gas is metered into a mixing pipeline A6, the natural gas in the mixing pipeline A6 and the natural gas of the third gas line 301 are connected to a gas collecting station B7, and after throttling and depressurization and metering, the natural gas and the natural gas are simultaneously input into a mixing pipeline C10 through a mixing pipeline B8 and the fourth gas line 401, are connected to a purification plant 11 through a mixing pipeline C10, and enter the purification plant 11 for purification treatment.
It should be noted that the gas gathering station refers to a transfer station for collecting and processing natural gas. The gas wells with more than two holes are respectively connected to a gas collecting station from a well mouth by pipelines, natural gas sent by each gas well is respectively throttled and depressurized in the station, free liquid and other mechanical impurities in the gas are separated, the yield of the gas well is measured, and then the gas of each gas well is converged and then is input into a gas collecting trunk line from the gas collecting station. Because the gas is throttled and depressurized and the gas temperature is reduced at the same time, if the gas pressure and temperature conditions are in a hydrate generation area, a gas heating device is required to be arranged at the upstream of the throttling and depressurization to avoid the generation of hydrates to block pipelines. The gas gathering station mainly comprises 6 systems, namely a natural gas pressure regulating and metering system, a natural gas purification system, a natural gas compression system, a natural gas storage system, a CNG (compressed natural gas) filling system and a control system. The natural gas delivered to the gas filling station is subjected to pressure stabilization and metering, enters a purification treatment device for purification treatment, is pressurized by a compressor, is subjected to high-pressure dehydration and then is sent to a gas storage system through a sequence control panel, and finally is filled with gas by a gas filling machine in an external metering manner.
The simulation device provided by the embodiment is used for simulating a natural gas gathering and transportation pipe network, simulating a gas field gathering and transportation pipeline by using process simulation software HYSYS according to the natural gas gathering and transportation pipe network, monitoring the actual running state of the pipeline, acquiring data such as temperature, pressure and flow of fluid in the gathering and transportation process, determining the diameter of the gathering and transportation pipeline according to the distance and the elevation of a gas well from a gas collecting station, estimating the composition, the temperature and the pressure of the natural gas which is externally transported to the downstream, and having important guiding significance for the type selection of equipment for secondary processing of the downstream natural gas.
Example 2:
a second embodiment of the present invention relates to a simulation apparatus for a long-distance pipeline, as shown in fig. 1, including four gas wells, i.e., a first gas well 1, a second gas well 2, a third gas well 3, and a fourth gas well 4;
the wellhead of the first gas well 1 is connected with the inlet end of a first gas transmission pipeline 101, the wellhead of the second gas well 2 is connected with the inlet end of a second gas transmission pipeline 201, the wellhead of the third gas well 3 is connected with the inlet end of a third gas transmission pipeline 301, and the fourth gas well 4 is connected with the inlet end of a fourth gas transmission pipeline 401;
the outlet end of the first gas line 101 and the outlet end of the second gas line 201 are both connected to the inlet of the same gas station A5, the outlet of the gas station A5 is connected to the inlet end of a mixing line A6, the outlet end of the mixing line A6 and the outlet end of the third gas line 301 are both connected to the inlet of the same gas station B7, the outlet of the gas station B7 is connected to the inlet end of a mixing line B8, the outlet end of the mixing line B8 and the outlet end of the fourth gas line 401 are both connected to the inlet of the same gas station C9, the outlet of the gas station C9 is connected to the inlet end of the mixing line C10, and the outlet end of the mixing line C10 is connected to the purification plant.
Specifically, the present embodiment preferably gives the optimum data values of the simulation apparatus, with reference to the following:
the first gas transmission pipeline 101 is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 150 meters, the altitude is 645 meters, and the height difference is +6 meters; the length of the pipe section II is 125 meters, the altitude is 636.5 meters, and the altitude difference is-8.5 meters; the length of the pipe section III is 100 meters, the altitude is 637 meters, and the height difference is +0.5 meter; the ground surface burial depths of the three pipe sections are all 1 meter.
The second gas transmission pipeline 201 is composed of a pipe section, the length of the pipe section is 200 meters, the altitude is 637 meters, the altitude difference is +23 meters, and the ground surface burial depth is 1 meter.
The third gas transmission pipeline 301 is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 160 meters, the altitude is 648 meters, and the altitude difference is +12.5 meters; the length of the pipe section II is 100 meters, the altitude is 634 meters, and the height difference is-14 meters; the length of the pipe section III is 205 meters, the altitude is 633 meters, and the height difference is-4 meters; the ground surface burial depths of the three pipe sections are all 1 meter.
The fourth gas transmission pipeline 401 is formed by connecting two pipe sections, wherein the length of the pipe section I is 180 meters, the altitude is 625 meters, and the elevation difference is-7.5 meters; the length of the pipe section II is 165 meters, the altitude is 617 meters, and the elevation difference is-8 meters; the ground surface burial depths of the two pipe sections are both 1 meter.
It should be noted that the altitude, also called as absolute height, refers to the height difference between a certain ground and the sea level, and is usually calculated by taking the average sea level as a standard, which indicates the vertical distance from the certain ground to the sea level; the height difference is the height difference between two points, namely the terminal point elevation minus the starting point elevation.
Example 3:
referring to fig. 1, a third embodiment of the present invention relates to a simulation apparatus for a long-distance pipeline, including four gas wells, i.e., a first gas well 1, a second gas well 2, a third gas well 3, and a fourth gas well 4;
the wellhead of the first gas well 1 is connected with the inlet end of a first gas transmission pipeline 101, the wellhead of the second gas well 2 is connected with the inlet end of a second gas transmission pipeline 201, the wellhead of the third gas well 3 is connected with the inlet end of a third gas transmission pipeline 301, and the fourth gas well 4 is connected with the inlet end of a fourth gas transmission pipeline 401;
the outlet end of the first gas line 101 and the outlet end of the second gas line 201 are both connected to the inlet of the same gas station A5, the outlet of the gas station A5 is connected to the inlet end of a mixing line A6, the outlet end of the mixing line A6 and the outlet end of the third gas line 301 are both connected to the inlet of the same gas station B7, the outlet of the gas station B7 is connected to the inlet end of a mixing line B8, the outlet end of the mixing line B8 and the outlet end of the fourth gas line 401 are both connected to the inlet of the same gas station C9, the outlet of the gas station C9 is connected to the inlet end of the mixing line C10, and the outlet end of the mixing line C10 is connected to the purification plant.
Specifically, the present embodiment preferably gives the optimum data values of the simulation apparatus, with reference to the following:
the first gas transmission pipeline 101 is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 150 meters, the altitude is 645 meters, and the height difference is +6 meters; the length of the pipe section II is 125 meters, the altitude is 636.5 meters, and the altitude difference is-8.5 meters; the length of the pipe section III is 100 meters, the altitude is 637 meters, and the height difference is +0.5 meter; the ground surface burial depths of the three pipe sections are all 1 meter.
The second gas transmission pipeline 201 is composed of a pipe section, the length of the pipe section is 200 meters, the altitude is 637 meters, the altitude difference is +23 meters, and the ground surface burial depth is 1 meter.
The third gas transmission pipeline 301 is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 160 meters, the altitude is 648 meters, and the altitude difference is +12.5 meters; the length of the pipe section II is 100 meters, the altitude is 634 meters, and the height difference is-14 meters; the length of the pipe section III is 205 meters, the altitude is 633 meters, and the height difference is-4 meters; the ground surface burial depths of the three pipe sections are all 1 meter.
The fourth gas transmission pipeline 401 is formed by connecting two pipe sections, wherein the length of the pipe section I is 180 meters, the altitude is 625 meters, and the elevation difference is-7.5 meters; the length of the pipe section II is 165 meters, the altitude is 617 meters, and the elevation difference is-8 meters; the ground surface burial depths of the two pipe sections are both 1 meter.
The mixing pipeline A6 consists of a pipe section with the length of 355 meters, the altitude of 633 meters and the height difference of-1 meter; the buried depth of the ground surface of the pipe section is 1 meter.
The mixing pipeline B8 consists of a pipe section, the length of the pipe section is 300 meters, the altitude is 617 meters, and the height difference is-16 meters; the buried depth of the ground surface of the pipe section is 1 meter.
The hybrid pipeline C10 is composed of a pipe section with a length of 340 m, an altitude of 604 m and a height difference of-13 m, and the surface buried depth of the pipe section is 1 m.
Example 4:
the embodiment provides a simulation method of a simulation device of a long-distance pipeline, which comprises the following steps:
step one, establishing a simulation device of a long-distance pipeline by using HYSYS software, wherein the simulation device of the long-distance pipeline comprises four groups of gas wells, namely a first gas well 1, a second gas well 2, a third gas well 3 and a fourth gas well 4;
the wellhead of the first gas well 1 is connected with the inlet end of a first gas transmission pipeline 101, the wellhead of the second gas well 2 is connected with the inlet end of a second gas transmission pipeline 201, the wellhead of the third gas well 3 is connected with the inlet end of a third gas transmission pipeline 301, and the fourth gas well 4 is connected with the inlet end of a fourth gas transmission pipeline 401;
the outlet end of the first gas line 101 and the outlet end of the second gas line 201 are both connected to the inlet of the same gas station A5, the outlet of the gas station A5 is connected to the inlet end of a mixing line A6, the outlet end of the mixing line A6 and the outlet end of the third gas line 301 are both connected to the inlet of the same gas station B7, the outlet of the gas station B7 is connected to the inlet end of a mixing line B8, the outlet end of the mixing line B8 and the outlet end of the fourth gas line 401 are both connected to the inlet of the same gas station C9, the outlet of the gas station C9 is connected to the inlet end of the mixing line C10, and the outlet end of the mixing line C10 is connected to the purification plant.
Specifically, the present embodiment preferably gives the optimum data values of the simulation apparatus, with reference to the following:
the first gas transmission pipeline 101 is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 150 meters, the altitude is 645 meters, and the height difference is +6 meters; the length of the pipe section II is 125 meters, the altitude is 636.5 meters, and the altitude difference is-8.5 meters; the length of the pipe section III is 100 meters, the altitude is 637 meters, and the height difference is +0.5 meter; the ground surface burial depths of the three pipe sections are all 1 meter. The second gas transmission pipeline 201 is composed of a pipe section, the length of the pipe section is 200 meters, the altitude is 637 meters, the altitude difference is +23 meters, and the ground surface burial depth is 1 meter. The third gas transmission pipeline 301 is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 160 meters, the altitude is 648 meters, and the altitude difference is +12.5 meters; the length of the pipe section II is 100 meters, the altitude is 634 meters, and the height difference is-14 meters; the length of the pipe section III is 205 meters, the altitude is 633 meters, and the height difference is-4 meters; the ground surface burial depths of the three pipe sections are all 1 meter. The fourth gas transmission pipeline 401 is formed by connecting two pipe sections, wherein the length of the pipe section I is 180 meters, the altitude is 625 meters, and the elevation difference is-7.5 meters; the length of the pipe section II is 165 meters, the altitude is 617 meters, and the elevation difference is-8 meters; the ground surface burial depths of the two pipe sections are both 1 meter.
The mixing pipeline A6 consists of a pipe section with the length of 355 meters, the altitude of 633 meters and the height difference of-1 meter; the buried depth of the ground surface of the pipe section is 1 meter. The mixing pipeline B8 consists of a pipe section, the length of the pipe section is 300 meters, the altitude is 617 meters, and the height difference is-16 meters; the buried depth of the ground surface of the pipe section is 1 meter. The hybrid pipeline C10 is composed of a pipe section with a length of 340 m, an altitude of 604 m and a height difference of-13 m, and the surface buried depth of the pipe section is 1 m.
Next, corresponding parameters, such as temperature values and pressure values of the fluid in each pipeline in the simulation device, are input or selected in the HYSYS software:
step one, establishing a simulation device of a long-distance pipeline by using HYSYS software, and inputting temperature values and pressure values of four gas wells in the HYSYS software: the temperature of natural gas produced by the first gas well 1 is 49 ℃, the pressure is 4135kPa, the temperature of natural gas produced by the second gas well 2 is 45 ℃, the pressure is 3450kPa, the temperature of natural gas produced by the third gas well 3 is 40 ℃, the pressure is 3497kPa, the temperature of natural gas produced by the fourth gas well 4 is 35 ℃, and the pressure is 4395 kPa;
step two, simulating a simulation device of the long-distance pipeline by HYSYS software according to the input temperature value and the input pressure value, monitoring the actual running state of the long-distance pipeline, and recording a simulation result, wherein the simulation result comprises the flow, the temperature and the pressure of the fluid and the natural gas component, and the specific simulation result is obtained as follows: obtaining the temperature of the natural gas output by the first gas transmission pipeline 101 to be 35.4 ℃, the pressure to be 3269kPa and the flow to be 425 kmole/h; the temperature of the natural gas output by the second gas transmission line 201 is 43.3 ℃, the pressure is 3276kPa, and the flow rate is 375 kmole/h; the natural gas output by the first gas pipeline 101 and the natural gas output by the second gas pipeline 201 enter a gas collecting station A5 together to be mixed, and the temperature of the material flow output by the gas collecting station A5 is 36.3 ℃, the pressure is 3269kPa, and the flow is 800 kgmole/h; the output material flow enters a mixing pipeline A6, the temperature of the material flow output by the mixing pipeline A6 is 5 ℃, the pressure is 2754kPa, and the flow rate is 800 kgmole/h;
the temperature of the natural gas output by the third gas transmission pipeline 301 is 4.8 ℃, the pressure is 2044kPa, and the flow rate is 575 kgmole/h; the natural gas output by the third gas line 301 and the material flow output by the mixing line A6 enter a gas collecting station B7 to be mixed, and the temperature of the material flow output by the gas collecting station B7 is 1.1 ℃, the pressure is 2044kPa, and the flow is 1375 kgmole/h; the output material flow enters a mixing pipeline B8, the temperature of the material flow output by the mixing pipeline B8 is 4.9 ℃, the pressure is 1797kPa, and the flow rate is 1375 kgmole/h;
the temperature of the natural gas output by the fourth gas transmission pipeline 401 is 4.9 ℃, the pressure is 2946kPa, and the flow rate is 545 kgmole/h; the natural gas output by the fourth gas line 401 and the material flow output by the mixing line B8 enter the gas gathering station C9 together to be mixed, the temperature of the natural gas output by the gas gathering station C9 is 5.6 ℃, the pressure is 1797kPa, the temperature of the material flow output by the mixing line C10 is 4.9 ℃, the pressure is 1596kPa, and the flow rate is 1920kgmole/h, and the natural gas and the material flow are directly input into the purification plant 11.
It is to be noted that the above-mentioned flow units kgmole/h and kmole/h are the same meaning and both indicate kmole per hour.
Specifically, the molar composition of the natural gas for the four gas wells calculated according to the HYSYS software is as follows:
TABLE 1 gas well 1 gas mol composition TABLE
| Components | C1 | C2 | C3 | i-c4 | n-c4 | i-c5 | n-c5 | C6 | N2 | H2S | CO2 | H2O |
| Composition of | 72.5% | 8.2% | 4.6% | 1.5% | 1.8% | 1.2% | 1.3% | 0.9% | 0 | 4.1% | 1.5% | 0 |
Table 2 gas well 2 gas mol composition table
| Components | C1 | C2 | C3 | i-c4 | n-c4 | i-c5 | n-c5 | C6 | N2 | H2S | CO2 | H2O |
| Composition of | 68% | 19.2% | 7.1% | 1.2% | 0.9% | 0.4% | 0.2% | 0 | 0.3% | 2.4% | 0.5% | 0 |
Table 3 gas well 3 natural gas mole composition table
| Components | C1 | C2 | C3 | i-c4 | n-c4 | i-c5 | n-c5 | C6 | N2 | H2S | CO2 | H2O |
| Composition of | 56.6% | 25.5% | 1.5% | 0.4% | 0.8% | 0.4% | 0.4% | 0.6% | 0.5% | 1.4% | 2.1% | 9% |
Table 4 gas well 4 natural gas molar composition table
| Components | C1 | C2 | C3 | i-c4 | n-c4 | i-c5 | n-c5 | C6 | N2 | H2S | CO2 | H2O |
| Composition of | 41.8% | 8.9% | 7.1% | 1.5% | 3.8% | 1.3% | 1.6% | 0 | 1% | 0 | 0.4% | 0 |
TABLE 5 Natural gas molar composition Table for purification plant
| Components | C1 | C2 | C3 | i-c4 | n-c4 | i-c5 | n-c5 | C6 | N2 | H2S | CO2 | H2O |
| Composition of | 58.2% | 15.7% | 4.8% | 1.1% | 1.9% | 0.8% | 0.9% | 0.4% | 0.5% | 1.8% | 1.1% | 2.7% |
From the molar composition tables of natural gas in tables 1 to 5, it can be inferred that as natural gas flows in the pipeline, the other components do not change greatly, and the water composition is reduced from the original 9% to 2.7%, because the water composition in the pipeline changes with the temperature change of the long-distance pipeline, and most of the water composition is evaporation loss due to the temperature gradient after mixing of each branch line.
The utility model discloses a long defeated pipeline's analog system and method be according to when two-phase flow flows in the pipeline, the temperature and the pressure of the fluid that heat loss that the temperature of natural gas in the pipeline and external environment's temperature difference arouse calculated. The temperature and pressure changes of the fluid are also related to the heat transfer coefficient of the inner wall of the pipe, the heat insulation material, the heat conductivity coefficient of the material, the soil type, the heat conductivity coefficient of the soil and the burial depth. The simulation system and method of the long-distance pipeline can determine the diameter of the gathering and transportation pipeline according to the composition of the raw material gas and the distance and the elevation of the gas well from the gas gathering station, estimate the composition, the temperature and the pressure of the natural gas which is externally transported to the downstream, and have important guiding significance for the equipment type selection of the secondary processing treatment of the downstream natural gas.
It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.
Claims (8)
1. The utility model provides a simulation device of long distance pipeline which characterized in that: the gas well comprises four groups of gas wells, namely a first gas well (1), a second gas well (2), a third gas well (3) and a fourth gas well (4);
the wellhead of the first gas well (1) is connected with the inlet end of a first gas transmission pipeline (101), the wellhead of the second gas well (2) is connected with the inlet end of a second gas transmission pipeline (201), the wellhead of the third gas well (3) is connected with the inlet end of a third gas transmission pipeline (301), and the fourth gas well (4) is connected with the inlet end of a fourth gas transmission pipeline (401);
the outlet end of the first gas pipeline (101) and the outlet end of the second gas pipeline (201) are connected to the inlet of the same gas station A (5), the outlet of the gas station A (5) is connected with the inlet end of a mixing pipeline A (6), the outlet end of the mixing pipeline A (6) and the outlet end of the third gas pipeline (301) are connected to the inlet of the same gas station B (7), the outlet of the gas station B (7) is connected with the inlet end of a mixing pipeline B (8), the outlet end of the mixing pipeline B (8) and the outlet end of the fourth gas pipeline (401) are connected to the inlet of the same gas station C (9), the outlet of the gas station C (9) is connected with the inlet end of a mixing pipeline C (10), and the outlet end of the mixing pipeline C (10) is connected to a purification plant (11).
2. The simulation device of a long distance pipeline according to claim 1, wherein: the first gas transmission pipeline (101) is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 150 meters, the altitude is 645 meters, and the height difference is +6 meters; the length of the pipe section II is 125 meters, the altitude is 636.5 meters, and the altitude difference is-8.5 meters; the length of the pipe section III is 100 meters, the altitude is 637 meters, and the height difference is +0.5 meter; the ground surface burial depths of the three pipe sections are all 1 meter.
3. The simulation device of a long distance pipeline according to claim 1, wherein: the second gas transmission pipeline (201) is composed of a pipe section, the length of the pipe section is 200 meters, the altitude is 637 meters, the altitude difference is +23 meters, and the ground surface burial depth is 1 meter.
4. The simulation device of a long distance pipeline according to claim 1, wherein: the third gas transmission pipeline (301) is formed by sequentially connecting three pipe sections, wherein the length of the pipe section I is 160 meters, the altitude is 648 meters, and the altitude difference is +12.5 meters; the length of the pipe section II is 100 meters, the altitude is 634 meters, and the height difference is-14 meters; the length of the pipe section III is 205 meters, the altitude is 633 meters, and the height difference is-4 meters; the ground surface burial depths of the three pipe sections are all 1 meter.
5. The simulation device of a long distance pipeline according to claim 1, wherein: the fourth gas transmission pipeline (401) is formed by connecting two pipe sections, wherein the length of the pipe section I is 180 meters, the altitude is 625 meters, and the elevation difference is-7.5 meters; the length of the pipe section II is 165 meters, the altitude is 617 meters, and the elevation difference is-8 meters; the ground surface burial depths of the two pipe sections are both 1 meter.
6. A simulation device of a long transport pipeline according to claim 1, 2 or 3, characterized in that: the mixing pipeline A (6) consists of a pipe section, the length of the pipe section is 355 meters, the altitude is 633 meters, and the altitude difference is-1 meter; the buried depth of the ground surface of the pipe section is 1 meter.
7. The simulation device of a long distance pipeline according to claim 1, wherein: the mixing pipeline B (8) consists of a pipe section, the length of the pipe section is 300 meters, the altitude is 617 meters, and the height difference is-16 meters; the buried depth of the ground surface of the pipe section is 1 meter.
8. The simulation device of a long distance pipeline according to claim 1, wherein: the mixed pipeline C (10) is composed of a pipeline section, the length of the pipeline section is 340 meters, the altitude is 604 meters, the elevation difference is minus 13 meters, and the ground surface burial depth of the pipeline section is 1 meter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110207012A (en) * | 2019-06-18 | 2019-09-06 | 西安长庆科技工程有限责任公司 | A kind of simulator and analogy method of long distance pipeline |
| CN110207012B (en) * | 2019-06-18 | 2024-03-01 | 西安长庆科技工程有限责任公司 | Simulation device and simulation method for long-distance pipeline |
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