CN202001836U - Medium-pressure gas collection device based on cluster well - Google Patents
Medium-pressure gas collection device based on cluster well Download PDFInfo
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- CN202001836U CN202001836U CN 201120057944 CN201120057944U CN202001836U CN 202001836 U CN202001836 U CN 202001836U CN 201120057944 CN201120057944 CN 201120057944 CN 201120057944 U CN201120057944 U CN 201120057944U CN 202001836 U CN202001836 U CN 202001836U
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Abstract
The utility model relates to a gas field gas transmission device based on a cluster well, in particular to a medium-pressure gas collection device based on the cluster well. The medium-pressure gas collection device comprises various gas wells in a cluster well group, gas production branch lines, a gas production main pipe and a gas collection station, wherein an underground throttler is arranged in each gas well. The medium-pressure gas collection device is characterized in that: wellhead devices of the various gas wells in the cluster well group are gathered through the gas production branch lines; the cluster well group is gathered and then is connected with the gas collection station through the gas production main pipe; alcohol injection pipelines are laid in the same ditches as the gas production branch lines; and one end of each alcohol injection pipeline is connected with a corresponding wellhead device, and the other end of the alcohol injection pipeline is connected with an alcohol injection device. In the medium-pressure gas collection device based on the cluster well, heating furnaces are not required to be arranged on wellheads or the gas collection station and compressors are not required to be arranged on the gas collection station under the condition of saving the cost and simplifying processes, and natural gas in the well can be securely transported to a central treatment factory for treatment by fully utilizing stratum pressure.
Description
Technical field
The utility model relates to a kind of gas field air delivery device based on cluster well, particularly a kind of middle pressure gas-collecting device based on cluster well.
Background technique
Gas field gas collection method commonly used has high-pressure gas collection method and mesolow gas collection method.
The high-pressure gas collection method, mainly be applicable to output height, the gas field that production rate-maintenance capability is strong, because directly the rock gas air pressure of exporting in the well is very high, for being transferred to gas gathering station with rock gas, safety carries out gas-liquid separation, by the gas collection service main natural gas transport is arrived central treatment plant deoiling, dewatering again, it is stifled to prevent that pipeline from freezing hydrate inhibitor methyl alcohol to be injected well head from gas gathering station.The well number is many when the gas field, well spacing is little, and under the low situation of well yield, above-mentioned technology is obviously given and produced and management brings many inconveniences, has increased cost of production.
Generally adopt the mesolow gas collection method for the low yield gas field, well head is provided with oven, is lower than the pressure that gas production pipeline operating conditions hydrate forms with being throttled to after the heating of well head rock gas, and the rock gas mesolow is delivered to gas gathering station; Perhaps the patent No. of application is before the applicant: 200710079036.3, and mesolow gas collection method patent adopts underground throttle device to make the gas pressure of exporting in the well be lower than the pressure that gas production pipeline operating conditions hydrate forms at gas well.
Along with the development of technology, many advantages such as the cluster well development technique is low because of investing, floor space is little, management point is few are popularized in an all-round way in the gas field is built.Cluster well is promptly built number implication well in 1 well site, be generally 3～9 mouthfuls, well group output height, pressure decline is slow relatively, and above-mentioned mesolow gas collection method will cause rock gas in the well head throttling, in the gas gathering station supercharging, gas gathering station is provided with compressor in advance, is unfavorable for the utilization of strata pressure; The flow line caliber increases, and has increased construction investment and operating cost.If adopt the high-pressure gas collection method, because stable yields time relative high yield gas field is shorter, piping design pressure is high and discarded too early; Annotate alcohol in gas gathering station, cause annotating pure pipeline designs pressure height, pipeline is long, and investment is high, and macroeconomy is poor.
Summary of the invention
The purpose of this utility model provides a kind of at the saving cost, simplify under the situation of technology, do not need well head or gas gathering station that oven is set, do not need to be provided with compressor in gas gathering station, make full use of strata pressure, just can make the rock gas safe transmission in the well handle the middle pressure gas-collecting device that factory and office manage based on cluster well to central authorities.
The purpose of this utility model is to realize like this, design a kind of middle pressure gas-collecting device based on cluster well, it comprises each gas well, gas production branch line, gas production main, gas gathering station in the cluster well group, underground throttle device is arranged in the gas well, it is characterized in that: the wellhead assembly of each gas well compiles by the gas production branch line in the cluster well group, each cluster well group is compiled the back and is connected with gas gathering station by the gas production main, the laying in one ditch of gas production branch line has the pure pipeline of notes, annotate pure pipeline one end and be connected with wellhead assembly, the other end of annotating pure pipeline is connected with annotates pure device.
Described wellhead assembly comprises well head block valve, flowmeter, rock gas block valve, safety check, methyl alcohol block valve, methyl alcohol header, rock gas header, the well head punishment of gas well is two pipelines, wherein one connects and composes natural gas line with well head block valve, flowmeter, the rock gas block valve back of connecting successively with the rock gas header, and the rock gas header compiles the back with the natural gas line of other gas well of cluster well group and is connected with the gas production branch line; Connect and compose the pure pipeline of notes with the methyl alcohol header after another is connected safety check, methyl alcohol block valve successively, be connected with the pure pipeline of notes behind the notes alcohol pipe influx of methyl alcohol header with other gas well of cluster well group.
The pure device of described notes is made up of methyl alcohol storage tank, alchol-injection pump, methyl alcohol flowmeter, filter, and the notes alcohol pipeline that each gas well connects is connected to the outlet end of methyl alcohol storage tank respectively successively by alchol-injection pump, methyl alcohol flowmeter, filter.
Described gas gathering station is connected with central treatment plant by the gas collection branch line, and gas gathering station is provided with gas-liquid separator.
Distance is at 1500 meters-3000 meters between described underground throttle device and the wellhead assembly.
Described cluster well group is made up of 3～9 mouthfuls of rock gas gas wells.
The utility model has the advantages that: this gas collection technique fully combines the advantage of high-pressure gas collection and mesolow gas collection technique, makes full use of bottom hole temperature (BHT), by underground throttle device, well head pressure is dropped to middle pressure, makes full use of stratum energy; Pipeline is not incubated, and well head is annotated alcohol, guarantees not form in natural gas transport hydrate; The middle gas collection of pressing avoids gas gathering station that compressor is set in advance, also reduces the notes alcohol amount of well head; Maintenance workload is little, convenient management, and device is simple, invests low; Reach reduction pit shaft hydrate by downhole choke and stop up probability, improve fluid-carrying capability, reduce the pipeline operating pressure, the purpose of protection reservoir; Adopt and annotate the technology that alcohol suppresses hydrate, can adjust the injection amount of alcohol according to production status, adjust flexibly, the operating mode adaptive capacity is strong, has improved the ability that the gas field steadily produces; Press operation in the pipeline, the gas transmission ability is strong, has reduced the flow line caliber, reduces construction investment.The pressure that methyl alcohol injects has reduced the power of methyl alcohol and the design pressure and the wall thickness of the pure pipeline of notes much smaller than the high-pressure gas collection station, has promptly reduced energy consumption, has reduced construction investment again.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified:
Fig. 1 is the utility model structural representation;
Fig. 2 is a cluster well well site structural representation.
Among the figure: 1, cluster well group, 2, wellhead assembly, 3, the gas production branch line, 4, annotate pure pipeline, 5, annotate pure device, 6, the gas production main, 7, gas gathering station, 8, the gas collection branch line, 9, central treatment plant; 10, methyl alcohol storage tank; 11, gas well, 12, the well head block valve, 13, flowmeter, 14, the rock gas block valve, 15, safety check, 16, the methyl alcohol block valve, 17, the methyl alcohol header, 18, the rock gas header, 19, alchol-injection pump, 20, the methyl alcohol flowmeter, 21, filter.
Embodiment
Shown in the structural representation of pressing gas-collecting device in the basis of Fig. 1, Fig. 2, it comprises cluster well group 1, wellhead assembly 2, gas production branch line 3, annotates pure pipeline 4, annotates pure device 5, gas production main 6, gas gathering station 7, gas collection branch line 8, central treatment plant 9.
The wellhead assembly 2 of each gas well 11 compiles by gas production branch line 3 in the cluster well group 1, each cluster well group 1 is compiled the back and is connected with gas gathering station 7 by gas production main 6,3 layings in one ditch of gas production branch line have the pure pipeline 4 of notes, annotate pure pipeline 4 one ends and be connected with wellhead assembly 2, the other end of annotating pure pipeline 4 is connected with annotates pure device 5.
Annotate pure pipeline 4 along 3 layings in one ditch of gas production branch line and annotate alcohol to each cluster well group 1, make rock gas in course of conveying, not form hydrate, guarantee the gas field smooth running, annotate pure device 5 and can annotate alcohol to this well group and peripheral well group simultaneously by annotating pure device 5.
This gas collection technique fully combines the advantage of high-pressure gas collection and mesolow gas collection technique, and pipeline is not incubated, and maintenance workload is little, avoids gas gathering station that compressor is set, convenient management, and device is simple, invests low; Compare with the mesolow gas collection method, it is characterized in that: 1, the well site is the cluster well group; 2, be provided with the pure device of notes in the cluster well group of compiling, prevent that to this well group and peripheral well group injection methyl alcohol hydrate from generating; 3, each cluster well group is laid the gas production branch line separately to the cluster well group of compiling; 4, gas gathering station does not establish compressor, directly utilizes strata pressure that raw natural gas is delivered to central treatment plant.
Embodiment 3
The methyl alcohol that is positioned at methyl alcohol storage tank 10 filters metering through filter 21, methyl alcohol flowmeter 20, after annotate pure pipeline 4 methyl alcohol of methyl alcohol storage tank 10 is being injected gas well 11 through alchol-injection pump 19 pressurization, methyl alcohol enters gas production branch line 3 with rock gas through the natural gas line of wellhead assembly 2.
Embodiment 4
Gas gathering station 7 among the embodiment 1 is provided with gas-liquid separator, and virgin gas is carried out transporting to 9 processing of central treatment plant by gas collection branch line 8 after the gas-liquid separation, and gas gathering station 7 does not establish compressor, makes full use of strata pressure virgin gas is delivered to central treatment plant 9.
Adopt the downhole choke technology, reduced well head pressure, gathering system pressure decreases, annotate the alcohol amount and only need guarantee that rock gas does not form hydrate in conveying, so winter, the methyl alcohol injection amount reduced significantly, only need a small amount of methyl alcohol that injects in summer, when the ground temperature of pipelining place is higher than hydrate-formation temperature, can not annotate alcohol.
Annotate alcohol by well head, press gas collection in the employing, avoided gas gathering station 7 and middle pressures treatment plant 9 two places supercharging modes, not only avoid gas gathering station 7 that compressor is set, the reduction construction investment has made things convenient for production management; Make full use of strata pressure simultaneously, reduced cost of production and gas consumption.
Press operation in the flow line 3, improved the gas transmission ability, reduced the flow line caliber, reduced construction investment.
Annotate pure pressure and also reduce to middle pressure, reduced the methyl alcohol injection pressure, reduced the power of alchol-injection pump, reduce the investment and the energy consumption of pump by high pressure.Annotate the design pressure of pure pipeline and reduce to middle pressure, reduced the wall thickness of annotating pure pipeline, reduced construction investment by high pressure.
The application's middle pressure gas-collecting device and see the following form in the main distinction of the mesolow gas-collecting device of first to file:
| Sequence number | Project | The middle gas-collecting device of pressing | The mesolow gas- |
| 1 | Operating pressure | Well head 5.0MPa, the 3.6MPa of gas gathering station | Press well head 4.0MPa, the 3.6MPa of gas gathering station in summer; Winter low pressure, well head 1.3MPa, the 1.0MPa of gas gathering station is pressurized to 3.6 |
| 2 | Hydrate suppresses technology | Downhole choke+compile well group to concentrate notes methyl alcohol | Downhole choke+gas gathering station supercharging |
| 3 | Technology characteristics | Press to 5.0MPa(by downhole choke), generate for preventing hydrate, in gathering together, injects in well methyl alcohol, press operation in the flow line, to reduce the caliber of flow line; Carry out gas-liquid separation in gas gathering station, do not need supercharging to fail outward; Alchol-injection pump and pipeline are also reduced to middle pressure. | By downhole choke to 4.0MPa(summer) or 1.3MPa(winter), make the pipeline operating pressure be lower than hydrate-formation temperature, do not form hydrate when normally moving, beyond preventing, the well site is provided with the oven interface, can heat throttling under the situations such as flow controller inefficacy; Flow line low pressure operation in winter, defeated outside after gas gathering station carries out gas-liquid separation and supercharging |
| 4 | The main distinction | The middle gas collection of pressing is annotated methyl alcohol and is carried out the hydrate inhibition, and the flow line caliber is little, and gas gathering station does not establish compressor | Determine the operating pressure of pipe network according to temperature, the oven position is reserved in the well site, and gas gathering station is provided with |
| 5 | Advantage | Make full use of strata pressure, it is directly outer defeated that gas gathering station does not establish compressor, reduces construction investment and operating cost, energy-saving and cost-reducing; Press operation in the flow line,, can effectively reduce the caliber of flow line, reduce construction investment for the high gas field of output; Adopt to annotate pure technology, mature and reliable can be annotated the alcohol amount according to the variation of temperature, the variation adjustment of gas well output, adjusts flexibly, is convenient to adjust the throughput in gas field, winter during emergency peak regulation particularly, strengthens and annotates pure amount and can ensure that the gas field high and stable yields produces. | Do not need to be provided with and annotate pure system, pipe network system is comparatively simple |
| 6 | Should scope | Well site quantity is few, and well spacing is bigger, the gas field that output and production rate-maintenance capability are stronger | Well site quantity is many, and well spacing is short, the gas field of gas well output and production rate-maintenance capability difference |
The middle pressure gas collection technique that this shows the application is to annotate a kind of technological method that methyl alcohol combines between high-pressure gas collection and mesolow gas collection downhole choke and well being gathered together, mainly be applicable to well site, gas field number, well spacing, well group output, production rate-maintenance capability etc. all under the situation of intermediate value, simple and cost is low with respect to the high-pressure gas collection technological method; With respect to the mesolow gas collection technique, identical caliber gas transmission ability increases by 2～3 times, and the gas transmission ability is strong; Identical throughput rate flow line caliber reduces by 30%～50%, has reduced construction investment; And gas gathering station is not provided with compressor, has promptly reduced equipment and has reduced construction investment, reduces fuel gas consumption again, reduces operation, administration cost.
Claims (6)
1. middle pressure gas-collecting device based on cluster well, it comprises each gas well (11) in the cluster well group (1), gas production branch line (3), gas production main (6), gas gathering station (7), gas well has underground throttle device in (11), it is characterized in that: the wellhead assembly (2) of each gas well (11) compiles by gas production branch line (3) in the cluster well group (1), each cluster well group (1) is compiled the back and is connected with gas gathering station (7) by gas production main (6), gas production branch line (3) laying in one ditch has the pure pipeline (4) of notes, annotate pure pipeline (4) one ends and be connected with wellhead assembly (2), the other end of annotating pure pipeline (4) is connected with annotates pure device (5).
2. a kind of middle pressure gas-collecting device according to claim 1 based on cluster well, it is characterized in that: described wellhead assembly (2) comprises well head block valve (12), flowmeter (13), rock gas block valve (14), safety check (15), methyl alcohol block valve (16), methyl alcohol header (17), rock gas header (18), the well head punishment of gas well (11) is two pipelines, wherein one with well head block valve (12), flowmeter (13), rock gas block valve (14) back of connecting successively connects and composes natural gas line with rock gas header (18), and rock gas header (18) compiles the back with the natural gas line of other gas well (11) of cluster well group (1) and is connected with gas production branch line (3); Connect and compose the pure pipeline of notes with methyl alcohol header (17) after another is connected safety check (15), methyl alcohol block valve (16) successively, be connected with the pure pipelines of notes (4) behind the notes alcohol pipe influx of methyl alcohol header (17) with other gas well (11) of cluster well group (1).
3. a kind of middle pressure gas-collecting device according to claim 1 based on cluster well, it is characterized in that: the pure device of described notes (5) is made up of methyl alcohol storage tank (10), alchol-injection pump (19), methyl alcohol flowmeter (20), filter (21), and the notes alcohol pipelines (4) that each gas well (11) connects are connected to the outlet end of methyl alcohol storage tank (10) respectively successively by alchol-injection pump (19), methyl alcohol flowmeter (20), filter (21).
4. a kind of middle pressure gas-collecting device based on cluster well according to claim 1 is characterized in that: described gas gathering station (7) is connected with central treatment plant (9) by gas collection branch line (8), and gas gathering station (7) is provided with gas-liquid separator.
5. a kind of middle pressure gas-collecting device based on cluster well according to claim 1 is characterized in that: distance is at 1500 meters-3000 meters between described underground throttle device and the wellhead assembly.
6. a kind of middle pressure gas-collecting device based on cluster well according to claim 1, it is characterized in that: described cluster well group (1) is made up of 3～9 mouthfuls of rock gas gas wells (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120057944 CN202001836U (en) | 2011-03-08 | 2011-03-08 | Medium-pressure gas collection device based on cluster well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120057944 CN202001836U (en) | 2011-03-08 | 2011-03-08 | Medium-pressure gas collection device based on cluster well |
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| CN202001836U true CN202001836U (en) | 2011-10-05 |
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| CN 201120057944 Expired - Fee Related CN202001836U (en) | 2011-03-08 | 2011-03-08 | Medium-pressure gas collection device based on cluster well |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674054A (en) * | 2014-11-17 | 2016-06-15 | 罗纳德·格兰特·肖莫迪 | Treatment and transport of exhaust gases to conserve resources and reduce emissions |
| CN106917960A (en) * | 2017-03-09 | 2017-07-04 | 中国石油大学(华东) | The stifled prevention robot control system(RCS) of point defeated station pressure regulator valve ice |
| CN111520108A (en) * | 2020-04-30 | 2020-08-11 | 成都百胜野牛科技有限公司 | Well group energy management method |
-
2011
- 2011-03-08 CN CN 201120057944 patent/CN202001836U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674054A (en) * | 2014-11-17 | 2016-06-15 | 罗纳德·格兰特·肖莫迪 | Treatment and transport of exhaust gases to conserve resources and reduce emissions |
| CN106917960A (en) * | 2017-03-09 | 2017-07-04 | 中国石油大学(华东) | The stifled prevention robot control system(RCS) of point defeated station pressure regulator valve ice |
| CN106917960B (en) * | 2017-03-09 | 2018-05-29 | 中国石油大学(华东) | Point defeated station field pressure regulator valve ice blocks up prevention robot control system(RCS) |
| CN111520108A (en) * | 2020-04-30 | 2020-08-11 | 成都百胜野牛科技有限公司 | Well group energy management method |
| CN111520108B (en) * | 2020-04-30 | 2022-05-24 | 成都百胜野牛科技有限公司 | Well group energy management method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20170308 |
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| CF01 | Termination of patent right due to non-payment of annual fee |