CN214425686U - Normal temperature gathering and transporting system suitable for low-yield low-permeability oil field high-water-content oil well - Google Patents
Normal temperature gathering and transporting system suitable for low-yield low-permeability oil field high-water-content oil well Download PDFInfo
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- CN214425686U CN214425686U CN202120457728.2U CN202120457728U CN214425686U CN 214425686 U CN214425686 U CN 214425686U CN 202120457728 U CN202120457728 U CN 202120457728U CN 214425686 U CN214425686 U CN 214425686U
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Abstract
The utility model relates to a normal atmospheric temperature profit of old district oil field is thoughtlessly defeated system of collection. A normal temperature gathering and transporting system suitable for a high water content oil well in a low-yield low-permeability oil field comprises a well site and a well mouth positioned in the well site; the method is characterized in that: the system comprises a normal liquid production system of a well site and an intermittent liquid production system of the well site; the normal liquid production system comprises a wellhead, a mixed oil pipe, a well site mixed outlet, a transfer station, a well site oil storage tank and a combined station; the inlet end of the mixed oil pipe is connected with each well mouth, and the outlet end of the mixed oil pipe is respectively connected with the inlet end of a well site mixed outlet and the inlet end of a well site oil storage tank; the outlet end of the well site oil storage tank is connected to the united station; the intermittent liquid production system comprises a wellhead, a well site oil storage tank and a combined station which are sequentially connected. This system is through the moisture content in the defeated system of control collection for the moisture content of the oil water mixture liquid in the pipeline is higher than the moisture content of phase inversion point, makes the process of producing liquid from the well head transportation to receiving and transferring the station, transports the joint station again and can realize the normal atmospheric temperature collection and defeated.
Description
Technical Field
The utility model belongs to the technical field of the defeated technique of oil field ground collection, a normal atmospheric temperature profit of old district oil field is thoughtlessly defeated collection and transportation system is related to. The method is suitable for the oil well plot area of the low-yield low-permeability oil field in the medium and high water content stage under the topographic condition of the mountain area in northern Shaanxi.
Background
The oil field ground engineering comprises five major systems, namely a mechanical recovery system, a gathering and transportation system, a water injection system, a thermodynamic system and a power distribution system, wherein the oil gas gathering and transportation system is a core part of ground production. The construction investment is huge, generally accounts for 60% -70% of the whole oil field ground engineering and accounts for about 40% of the whole oil field engineering. This cost includes primarily the initial capital investment for the gathering and transportation yard, the transportation system, and the cost of the later transportation. In order to reduce the construction investment and the production energy consumption, the optimization of the oil field ground engineering is very necessary, and the hauling and the gathering are changed into the main components of the optimization.
Compared with oil pulling in well sites, the crude oil gathering and transportation can improve the transportation efficiency, reduce the production and operation cost, reduce the loss of crude oil in transportation and provide possibility for realizing comprehensive automatic control. With the development of water injection of old oil wells, the water content of the oil wells is gradually increased, and the possibility is brought to the adjustment and construction of oil field ground engineering and the improvement of pipe transmission rate.
At present, heating and gathering are relatively common in oil fields throughout the country, especially in northern areas. Along with the fact that many oil fields in China enter the middle and later periods of exploitation and enter the stage with high water content and medium water content, the liquid production amount gradually rises, and the specific heat capacity of water is about 2 times of that of crude oil, so that the total specific heat capacity of the produced liquid rises, and the energy consumption of gathering, transportation and heating is increased. The water content of the oil well is obviously increased, the fluidity of produced liquid is improved, and seasonal unheated gathering and transportation of part of the oil well is realized under certain conditions. If the normal temperature operation of part of the high water content oil field gathering and transportation system can be realized, the gathering and transportation cost can be greatly reduced.
The ground gathering and transportation system is very common in oil-water mixed transportation, and oil-water mixtures form fine liquid drops under the shearing action of pipelines, pumps, valves and the like, so that emulsion is formed. When the water content in the oil-water emulsion system is low, the water-in-oil emulsion is adopted, and when the water content in the system is gradually increased and reaches a certain value, phase transformation occurs, so that the emulsion is changed from a water-in-oil type to an oil-in-water type. Near the phase inversion point, the flow characteristic of the emulsion can be changed sharply, the viscosity of the mixed liquid is reduced sharply, normal-temperature gathering and transportation can be realized to a certain degree, and the energy consumption is reduced.
Disclosure of Invention
The utility model discloses aim at solving to the aforesaid and increase the difficult problem that makes the defeated energy consumption of collection increase of moisture content, provide a normal atmospheric temperature profit thoughtlessly defeated collection system suitable for low yield hyposmosis old zone oil field.
The technical scheme of the utility model lies in:
a normal temperature gathering and transporting system suitable for a high water content oil well in a low-yield low-permeability oil field comprises a well site and a well mouth positioned in the well site; the system comprises a normal liquid production system of a well site and an intermittent liquid production system of the well site;
the normal liquid production system comprises a wellhead, a mixed oil pipe, a well site mixed outlet, a transfer station, a well site oil storage tank and a combined station;
the inlet end of the mixed oil pipe is connected with each well mouth, and the outlet end of the mixed oil pipe is respectively connected with the inlet end of a well site mixed outlet and the inlet end of a well site oil storage tank; the outlet end of the well site oil storage tank is connected to the united station;
the device also comprises a first metering pipeline, and a metering device for measuring the water content of the liquid production amount is also arranged on the first metering pipeline; the inlet end of the first metering pipeline is connected to the mixing oil pipe, and the outlet end of the first metering pipeline is connected to the inlet end of the wellsite mixing outlet and the inlet end of the wellsite oil storage tank;
the transfer station comprises a station entering main mechanism, a second metering pipeline and a pressurization outward conveying system which are sequentially connected, wherein the second metering pipeline is used for measuring the flow, the temperature and the water content of incoming liquid;
the intermittent liquid production system comprises a wellhead, a well site oil storage tank and a combined station which are sequentially connected.
The device also comprises a separation buffer tank, wherein the inlet end of the separation buffer tank is connected with the outlet end of the second metering pipeline, and the outlet end of the separation buffer tank is connected with the inlet end of the pressurization output system.
The ball collecting system is arranged in parallel with the second metering pipeline, the inlet end of the ball collecting system is connected with the outlet end of the station entering main mechanism, and the outlet end of the ball collecting system and the outlet end of the second metering pipeline are connected to the inlet end of the separation buffer tank after being mixed.
The pressurization output system comprises an oil transfer pump.
The pressurization output system further comprises a heating device, the heating device is a heat exchanger, the inlet end of the heat exchanger is connected to the outlet end of the separation buffer tank, and the outlet end of the heat exchanger is connected to the oil transfer pump.
The second metering pipeline comprises a metering oil tank and is also connected with a pressure relief branch.
And the wellsite mixed outlet and the transfer station are subjected to pipe transmission in a serial or parallel mode.
The technical effects of the utility model reside in that:
this system is through the moisture content in the defeated system of control collection for the moisture content of the oil water mixture liquid in the pipeline is higher than the moisture content of phase inversion point, makes the process of producing liquid from the well head transportation to receiving and transferring the station, transports the joint station again and can realize the normal atmospheric temperature collection and defeated.
Drawings
FIG. 1 is a schematic diagram of the system connection at the wellsite of example 1.
FIG. 2 is a schematic diagram of the system connection of the wellsite system of this embodiment 2.
Fig. 3 is a schematic diagram of system connection from the relay station to the cooperative station in this embodiment 2.
Fig. 4 is a schematic diagram of system connection from the relay station to the cooperative station in this embodiment 3.
Reference numerals: 1-a first well head, 2-a second well head, 3-a third well head, 4-a metering device, 5-a well site oil storage tank, 6-a well site mixing outlet, 7-a first well site mixing outlet, 8-a second well site mixing outlet, 9-a third well site mixing outlet, 10-a fourth well site mixing outlet, 11-a station entering main, 12-a ball collecting system, 13-a metering oil tank, 14-a vent gas pipeline, 15-a separation sewage pipeline, 16-a separation buffer tank, 17-a heat exchanger, 18-an oil transfer pump, 19-a combined station, 20-a well site and 21-a transfer receiving station.
Detailed Description
Example 1-Normal production at well site 20
When the well site 20 normally produces liquid, the oil-water mixed output liquid of each well head is collected into an oil pipe in the well site 20 through a mixed oil pipe, and meanwhile, a first metering pipeline is laid and connected into the mixed oil pipe for measuring the water content of the oil-water mixed output liquid; and when the water content does not reach the set value, the outlet end of the mixed oil pipe is connected to the inlet end of the well site oil storage tank 5, and the mixed oil pipe is heated in the well site oil storage tank 5 and then conveyed to the combined station 19.
Example 2-Normal production at well site 20
On the basis of the embodiment 1, when the water content reaches a set value or above, the outlet end of the mixed oil pipe is sequentially connected with the wellsite mixed outlet 6 and the transfer station 21, so that the combined station 19 is communicated. The attached figure of the outlet end of the mixed oil pipe connected with the wellsite mixed outlet 6 is shown in figure 2;
the figure of the transfer station 21 in communication with the union station 19 is shown in figure 3;
the mixing outlets 6 of the wellsites are converged in a transfer station 21, and the transfer station 21 boosts and outputs the liquid produced by the wellsites 20;
the mixed export 6 of each well site comes liquid and collects in the master of entering station 11 at first, gets into the second measurement pipeline, and flow, temperature and the moisture content that the mixed export 6 of each well site came liquid are measured, when the pressure was too high in the plumbing equipment flow, in time release pressure through the bypass switch, in addition, and to the mixed export 6 of well site comes liquid and carry out preliminary dehydration separation in measurement oil tank 13, when the moisture content was in the settlement scope, directly carry out the mixed export 6 of well site come liquid to the pressure boost defeated system defeated outward to the combination station 19.
Example 3 well head Normal production
On the basis of example 2, the figure of the transfer station 21 communicating with the combination station 19 is shown in FIG. 4;
if the water content is not in the set range, the wellsite mixing outlet 6 is used for conveying the liquid into the separation buffer tank 16.
When the pigging is needed, the pigging system 12 is also included, and the pigging system 12 receives the pigging from each well site 20; one end of the second metering pipeline and ball collecting system 12 is connected to the station entering main mechanism 11, and the other end is respectively connected to the separation buffer tank 16; the liquid coming from the second metering pipeline and the ball collecting system 12 enters a separation buffer tank 16 for partial dehydration; wherein, the gas separated from the separation buffer tank 16 enters an air vent pipeline 14 for venting; the water removed is transported via a separate sewer line 15 to a water injection station located at a distance from the outside and is treated before entering the external water injection system. Wherein, the water content of the produced liquid in the separation buffer tank 16 is sampled and measured for a plurality of times, and when the measured value is in a set range, the oil-water mixture without part of water is pressurized by the oil transfer pump 18 and is output to the combined station 19.
When the outdoor temperature is too low and the inlet temperature of the oil transfer pump 18 does not meet the requirement, the incoming liquid firstly passes through the heat exchanger 17 and then enters the oil transfer pump 18, and the incoming liquid is firstly heated by the heat exchanger 17 before entering the pressurization external transmission system, so that the normal operation of the oil transfer pump 18 is ensured.
When the distance, the height difference and the terrain between the well site 20 and the transfer station 21 are smaller than set values, a single pipe is adopted to directly enter the transfer station 21; when any one of the distance between the well site 20 and the transfer station 21 and the height difference is larger than a set value, the well site 20 is connected in series for pipe conveying on the premise of meeting the terrain, and the well site 20 is conveyed to the transfer station 21 after the closer well group is converged.
Example 4-intermittent production at well site 20
When the well site 20 produces liquid intermittently, the oil-water mixed produced liquid at each well head is directly connected to the inlet end of the well site oil storage tank 5, and is conveyed to the combined station 19 after primary separation and dehydration are realized in the well site oil storage tank 5. Each wellsite storage tank 5 is provided with a bypass line to prevent the series wellsite 20 metering system from needing to be serviced and otherwise. The heat preservation through the pipeline outer wall keeps warm in transportation process for the output fluid can keep well head oil production waste heat.
Examples of specific applications
When the oil field areas of the old area enter a high water content stage, liquid is continuously produced, and when the liquid production amounts of the first wellsite mixed outlet 7, the second wellsite mixed outlet 8, the third wellsite mixed outlet 9 and the fourth wellsite mixed outlet 10 are respectively 10m3/d、8 m3/d、12 m3/d、10m3And d, measuring that the water content of a phase inversion point is 60% after indoor research on crude oil in the area, wherein the terrain from the second wellsite mixed outlet 8 to the first wellsite mixed outlet 7 is from high to low, the altitude difference is 30m, the actual distance is 0.8m, the actual distances from the first wellsite mixed outlet 7, the third wellsite mixed outlet 9 and the fourth wellsite mixed outlet 10 to the transfer station 21 are 1.2m, 0.8m and 1.2m respectively, the distance from the transfer station 21 to the combined station 19 is 2m, and the water source of a water injection station in the wellsite is sufficient.
According to the situation, the terrain among the well sites 20 is changed from high to low, the distance is less than 2km, and the normal liquid production system of the well sites 20 is adopted at this time. As shown in fig. 2, the oil-water mixed output liquid of the first wellhead 1, the second wellhead 2 and the third wellhead 3 is collected in a mixed oil pipe in a well site 20, the mixed oil pipe is connected to a first metering pipeline, the water content of the oil-water mixed output liquid is periodically measured, and when the water content does not reach 60%, the oil-water mixed output liquid is transported into a well site oil storage tank 5 to be heated and then is transported to a combined station 19; when the water content reaches or exceeds 60 percent, the oil-water mixed output liquid is directly conveyed to the transfer station 21 by a pipe.
The mixed outlets 6 of each well field are collected in the station-entering main mechanism 11 in the transfer station 21, the pipeline is divided into two paths, one pipeline enters a second metering pipeline, the flow, the temperature and the water content of the liquid coming from the mixed outlets 6 of each well field are measured, and the measured flow is 30m3D, when the pressure in the pipeline equipment flow is too high and exceeds the design pressure by 2.5MPa, timely releasing the pressure through the pressure release branch; in addition, the metering oil tank 13 carries out preliminary dehydration and separation on the incoming liquid, and then the incoming liquid enters the oil transfer pump 18 for pressurization and external transportation; the other pipeline firstly enters a ball collecting system 12, collects the spherical pig in the liquid pipeline from a first wellsite mixing outlet 7, a second wellsite mixing outlet 8, a third wellsite mixing outlet 9 and a fourth wellsite mixing outlet 10, the outdoor temperature is too low in winter, and in order to enable the oil transfer pump 18 and the pipeline to normally operate, the pipeline enters the oil transfer pump 18 for pressurization and is output to a combined station 19.
Claims (7)
1. A normal temperature gathering and transporting system suitable for a high water content oil well in a low-yield low-permeability oil field comprises a well site and a well mouth positioned in the well site; the method is characterized in that: the system comprises a normal liquid production system of a well site and an intermittent liquid production system of the well site;
the normal liquid production system comprises a wellhead, a mixed oil pipe, a well site mixed outlet, a transfer station, a well site oil storage tank and a combined station;
the inlet end of the mixed oil pipe is connected with each well mouth, and the outlet end of the mixed oil pipe is respectively connected with the inlet end of a well site mixed outlet and the inlet end of a well site oil storage tank; the outlet end of the well site oil storage tank is connected to the united station;
the device also comprises a first metering pipeline, and a metering device for measuring the water content of the liquid production amount is also arranged on the first metering pipeline; the inlet end of the first metering pipeline is connected to the mixing oil pipe, and the outlet end of the first metering pipeline is connected to the inlet end of the wellsite mixing outlet and the inlet end of the wellsite oil storage tank;
the transfer station comprises a station entering main mechanism, a second metering pipeline and a pressurization outward conveying system which are sequentially connected, wherein the second metering pipeline is used for measuring the flow, the temperature and the water content of incoming liquid;
the intermittent liquid production system comprises a wellhead, a well site oil storage tank and a combined station which are sequentially connected.
2. The normal temperature gathering and transportation system suitable for the oil well with high water content in the low-yield and low-permeability oil field according to claim 1 is characterized in that: the device also comprises a separation buffer tank, wherein the inlet end of the separation buffer tank is connected with the outlet end of the second metering pipeline, and the outlet end of the separation buffer tank is connected with the inlet end of the pressurization output system.
3. The normal temperature gathering and transportation system suitable for the oil well with high water content in the low-yield and low-permeability oil field as claimed in claim 2 is characterized in that: the ball collecting system is arranged in parallel with the second metering pipeline, the inlet end of the ball collecting system is connected with the outlet end of the station entering main mechanism, and the outlet end of the ball collecting system and the outlet end of the second metering pipeline are connected to the inlet end of the separation buffer tank after being mixed.
4. The normal temperature gathering and transportation system suitable for the oil well with high water content in the low-yield and low-permeability oil field is characterized in that: the pressurization output system comprises an oil transfer pump.
5. The normal temperature gathering and transportation system suitable for the oil well with high water content in the low-yield and low-permeability oil field is characterized in that: the pressurization output system further comprises a heating device, the heating device is a heat exchanger, the inlet end of the heat exchanger is connected to the outlet end of the separation buffer tank, and the outlet end of the heat exchanger is connected to the oil transfer pump.
6. The normal temperature gathering and transportation system suitable for the oil well with high water content in the low-yield and low-permeability oil field is characterized in that: the second metering pipeline comprises a metering oil tank and is also connected with a pressure relief branch.
7. The normal temperature gathering and transportation system suitable for the oil well with high water content in the low-yield and low-permeability oil field is characterized in that: and the wellsite mixed outlet and the transfer station are subjected to pipe transmission in a serial or parallel mode.
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|---|---|---|---|
| CN202120457728.2U CN214425686U (en) | 2021-03-03 | 2021-03-03 | Normal temperature gathering and transporting system suitable for low-yield low-permeability oil field high-water-content oil well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120457728.2U CN214425686U (en) | 2021-03-03 | 2021-03-03 | Normal temperature gathering and transporting system suitable for low-yield low-permeability oil field high-water-content oil well |
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