CN101250995A - Middle-low pressure gas collection technique - Google Patents
Middle-low pressure gas collection technique Download PDFInfo
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- CN101250995A CN101250995A CN 200710079036 CN200710079036A CN101250995A CN 101250995 A CN101250995 A CN 101250995A CN 200710079036 CN200710079036 CN 200710079036 CN 200710079036 A CN200710079036 A CN 200710079036A CN 101250995 A CN101250995 A CN 101250995A
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Abstract
The invention relates to a gas transmission device for a gas field, in particular to a method for a middle and low pressure gas collecting process, comprising a gas well, a wellhead device (1), a gas transmission pipeline, a gas collecting station (5) and a central processing plant. The invention is characterized in that the pressure of a wellhead is reduced to a middle pressure or a low pressure through an underground throttleer (12), is directly subject to a gas-liquid separation and a gas supercharging through a gas collecting pipeline (4) being connected to the gas collecting station (5), and is transmitted to a central processing mechanism (17) for deoiling and dewatering through a gas collecting branch trunk (16). The method for the middle and low pressure gas collecting process achieves aims of reducing blockage probability of hydrate in a pitshaft, increasing the property of liquid carrying, reducing the operating pressure of the pipeline and protecting a reservoir through underground throttling.
Description
Technical field
The present invention relates to a kind of gas field air delivery device, particularly a kind of mesolow gas collection technique.
Background technology
As described in Figure 1, in the treatment process of the gas field of common process, because directly the natural gas air pressure of exporting in the well is very high, carries out gas-liquid separation for safety is transferred to gas gathering station 5 with natural gas, by gas collection service main 6 with natural gas transport to central treatment plant 7 deoiling, dewaterings.
After natural gas in the well is received wellhead assembly 1 by pipeline, need to be connected with heating furnace 3, make the natural gas air pressure step-down of well head by choke valve 2 and heating furnace 3 by choke valve 2 backs.And then be transferred to gas gathering station 5 by gas production main 4 and handle, well head need inject hydrate inhibitor to prevent that pipeline from freezing stifled simultaneously.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.
Summary of the invention
The purpose of this invention is to provide a kind of mesolow gas collection technique, it can save cost, simplify under the situation of technology, do not need well head heating furnace 3 and inject hydrate inhibitor, the natural gas safe transmission in the well is handled to central treatment plant 7 at well head.
The object of the present invention is achieved like this, the mesolow gas collection technique, it comprises gas well, wellhead assembly 1, gas pipeline, gas gathering station 5, central treatment plant, it is characterized in that: press or low pressure in by underground throttle device 12 well head pressure being dropped to, directly receive gas gathering station 5 then and carry out gas-liquid separation and natural gas boosting, deliver to central-processor organization 17 by gas collection service main 16 again and carry out deoiling, dewatering by flow line 4.
Distance is at 1500 meters-3000 meters between described underground throttle device 12 and the wellhead assembly 1.
Described wellhead assembly 1 is reserved and is imported and exported pipeline 15, is connected with the well head pipeline by flange.
Described gas collection service main 16 and central-processor organization 17 have the natural gas boosting device, carry out a supercharging and secondary booster respectively.
Described underground throttle device 12 is fixed in sleeve pipe 14 inner oil tubes 13 chambeies, shake bar 9 and be connected with adding by rope socket 8 with lengthening steel wire 7, add the lower end that shakes bar 9 and connect bumper jar 10, bumper jar 10 is to connect one to throw in instrument 11, by input instrument 11 underground throttle device 12 is fixed in oil pipe 13 chambeies.
Characteristics of the present invention are: make full use of bottom hole temperature (BHT), by underground throttle device, well head pressure is dropped to middle the pressure or low pressure, well head is not established heating furnace, does not annotate alcohol, and pipeline is not incubated, and maintenance workload is little, convenient management, and device is simple, invests low; Utilize heating furnace heating throttling step-down to drive a well, remove heating furnace after production is normal.Adopt heating furnace heating throttling, produced about 10 days, eliminating pit shaft raffinate, find out gas well deliverability after, throw in restriction choke again.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.
Description of drawings
The present invention will be further described below in conjunction with the embodiment accompanying drawing.
Fig. 1 is conventional individual well gas producing technology schematic diagram;
Fig. 2 is an embodiment of the invention structural representation;
Fig. 3 is wellhead assembly 1 structural representation of gas well and gas well mouth.
Among the figure: 1, wellhead assembly; 2, choke valve; 3, heating furnace; 4, flow line; 5, gas gathering station; 6, flow line; 7, steel wire; 8, rope socket; 9, add the shake bar; 10, bumper jar; 11, input instrument; 12, underground throttle device; 13, oil pipe; 14, sleeve pipe; 15, import and export pipeline; 16, gas collection service main; 17, central-processor organization.
The specific embodiment
As shown in Figure 1, it is the gas field treatment process of common process, natural gas in the gas well is received wellhead assembly 1 by pipeline, directly the natural gas air pressure of exporting in the well is very high, it will be connected with heating furnace 3 by choke valve 2 backs, makes natural gas air pressure step-down, in this technology, need control system to adjust various valves, need to measure flow, temperature, pressure.Receive gas gathering station 5 by flow line 4 then and handle, well head need inject hydrate inhibitor and prevents that pipeline from freezing stifled or pipeline is incubated simultaneously.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.
As shown in Figure 2, in order to make full use of bottom hole temperature (BHT), the present invention drops to middle pressure to well head pressure by underground throttle device, and well head is not established heating furnace, does not annotate alcohol, and pipeline is not incubated, and maintenance workload is little, convenient management, and device is simple, invests low.It is to have saved and will be connected with heating furnace 3 by choke valve 2 backs with Fig. 1 difference, makes the process of natural gas air pressure step-down, does not need control system to adjust various valves, does not need also to prevent that pipeline from freezing stifled and the pipeline insulation.Directly receive gas gathering station 5 and carry out gas-liquid separation and natural gas boosting, deliver to central-processor organization 17 by gas collection service main 16 again and carry out deoiling, dewatering by flow line 4.Need to prove that gas collection service main 16 and central-processor organization 17 have the natural gas boosting device respectively, realize secondary booster.
Fig. 3 is concrete underground throttle device 12 mounting structure schematic diagrames, underground throttle device 12 can be fixed on underground throttle device 12 in sleeve pipe 14 inner oil tubes 13 chambeies by following input instrument 11, and input instrument 11 comprises lengthening steel wire 7, rope socket 8, adds shake bar 9, bumper jar 10.Lengthening steel wire 7 by rope socket 8 with add shake bar 9 and be connected, add the lower end connection bumper jar 10 that shakes bar 9.By with in oil pipe 13 chambeies between the underground throttle device 12 stuck-at-500-3000 rice, natural gas is by the gap between sleeve pipe 14 and the oil pipe 13 or pass underground throttle device 12, rises to the wellhead assembly 1 of well head by oil pipe 13.By flow line 6 adjacent wellhead assembly is concatenated into gas production main 4 by wellhead assembly 1, delivers to gas gathering station 5 then and handle.
The input degree of depth of underground throttle device 12 is generally at underground 1500m～3000m, very high in this degree of depth sub-surface temperature, behind the downhole choke, reduced wellbore pressure, gas temperature decreases, utilize formation temperature that gas is heated, make after the throttling gas temperature can return to temperature before the throttling substantially, prevented the generation of pit shaft and well head pipeline hydrate.
Adopt the downhole choke technology, improved the gas well fluid-carrying capability, suppressed the generation of pit shaft and well head pipeline hydrate.Adopt the downhole choke technology, reduced well head pressure, gathering system pressure decreases, and injects the big degree of quantity of methyl alcohol and reduces, and in summer, need not inject methyl alcohol substantially; In the winter time, the pure method of the interim notes of employing prevents that hydrate from generating and influence production.Through evidence, need not inject methyl alcohol substantially in the gas well manufacturing process.
Adopt the downhole choke technology, the defeated process of collection needn't be provided with heating furnace.Before the restriction choke bringing normally into operation, adopt interim well head heating means, prevent to collect the generation of defeated process water compound.Therefore, the well head natural gas is very short heat time heating time, has reduced the heating furnace load, has simplified greatly to prevent that hydrate from generating technology.
Adopt the downhole choke technology, during gathering and transportation technology adopts, the low pressure gas collection, 2～3 ℃ of piping laying degree of depth place environment temperatures, therefore 1.5 ℃ of hydrate-formation temperatures, suppress hydrate in the defeated process of collection and generate technology, need not adopt heat preservation method.
Behind downhole choke, when well head pressure was 1.3MPa, well head did not heat, and flow line 6 is not incubated, does not annotate alcohol, and flow line 6 is embedded in the following gas collection technique of frost line, and well head can reach unmanned like this.When summer, ground temperature was higher, also pressure can be increased to the 4.0MPa operation, make full use of gas well pressure, stop compressor operating, save operating cost, it is 1.3MPa that the gas production main comes the gas pressure that enters the station, and comes gas to converge in the total office of entering the station of gas gathering station, be transported to central treatment plant after gas-liquid separation, supercharging, metering, transmission ﹠ distribution are given downstream user after central treatment plant deoiling, dewatering, supercharging.
By downhole choke and gas gathering station and treatment plant's two places supercharging mode, not only improved the recovery ratio of gas well, prolong the productive life of gas well, and improved the flexibility of manufacturing process, made things convenient for production management, reduced cost of production and energy consumption.
Cause the down-stream system superpressure for preventing that underground throttle device lost efficacy, only reserve and import and export pipeline 15, be connected with the well head pipeline, well head high-low pressure quick action emergency valve has been installed simultaneously, guaranteed pipeline safety by flange.Integral body can drag another well site from a well site with dolly.Lost efficacy as underground throttle device, added the interim heating furnace that goes into operation on the pipeline reserving to import and export, utilized heating furnace heating throttling step-down, and waited and remove heating furnace after fixing a breakdown.
In addition, reserve and import and export pipeline, when going into operation, also need.When going into operation, adopt heating furnace heating throttling step-down, produced about 10 days, eliminating pit shaft raffinate, find out gas well deliverability after, throw in restriction choke again.Go into operation heating furnace, Throttle needle valve and personal tracheae remittance etc., skid is on trailer.
The part that do not elaborate among the present invention is because what adopt is the technological means that industry technician uses always, and the parts that have are commercially available external members, so be not described further at this.
Claims (5)
1. mesolow gas collection technique, it comprises gas well, wellhead assembly (1), gas pipeline, gas gathering station (5), central treatment plant, it is characterized in that: press or low pressure in by underground throttle device (12) well head pressure being dropped to, directly receive gas gathering station (5) then and carry out gas-liquid separation and natural gas boosting, deliver to central-processor organization (17) by gas collection service main (16) again and carry out deoiling, dewatering by flow line (4).
2. mesolow gas collection technique according to claim 1 is characterized in that: distance is at 1500 meters-3000 meters between described underground throttle device (12) and the wellhead assembly (1).
3. mesolow gas collection technique according to claim 1 is characterized in that: described wellhead assembly (1) is reserved and is imported and exported pipeline (15), is connected with the well head pipeline by flange.
4. mesolow gas collection technique according to claim 1 is characterized in that: described gas collection service main (16) and central-processor organization (17) have the natural gas boosting device, carry out a supercharging and secondary booster respectively.
5. mesolow gas collection technique according to claim 1, it is characterized in that: described underground throttle device (12) is fixed in sleeve pipe (14) inner oil tube (13) chamber, shake bar (9) and be connected with adding by rope socket (8) with lengthening steel wire (7), the lower end that adds shake bar (9) connects bumper jar (10), bumper jar (10) is an integrative-structure with input instrument (11), by input instrument (11) underground throttle device (12) is fixed in oil pipe (13) chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710079036 CN101250995A (en) | 2006-12-28 | 2007-02-09 | Middle-low pressure gas collection technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620164887 | 2006-12-28 | ||
| CN200620164887.9 | 2006-12-28 | ||
| CN 200710079036 CN101250995A (en) | 2006-12-28 | 2007-02-09 | Middle-low pressure gas collection technique |
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| CN101250995A true CN101250995A (en) | 2008-08-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100235A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Gathering and transportation skid-mounted device for gas injection and production of salt cavern gas storage and process method |
| CN114183119A (en) * | 2021-12-09 | 2022-03-15 | 中石化中原石油工程设计有限公司 | Oil removing process for produced gas of underground gas storage with high condensate oil content |
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2007
- 2007-02-09 CN CN 200710079036 patent/CN101250995A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100235A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Gathering and transportation skid-mounted device for gas injection and production of salt cavern gas storage and process method |
| CN104100235B (en) * | 2013-04-03 | 2016-06-08 | 中国石油天然气股份有限公司 | A kind of salt hole air reserved storeroom note defeated skid of gas production collection is put and process |
| CN114183119A (en) * | 2021-12-09 | 2022-03-15 | 中石化中原石油工程设计有限公司 | Oil removing process for produced gas of underground gas storage with high condensate oil content |
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Application publication date: 20080827 |