CN1135012A - Method and apparatus for secondery obtg. gas from natural gas well - Google Patents
Method and apparatus for secondery obtg. gas from natural gas well Download PDFInfo
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- CN1135012A CN1135012A CN 96116237 CN96116237A CN1135012A CN 1135012 A CN1135012 A CN 1135012A CN 96116237 CN96116237 CN 96116237 CN 96116237 A CN96116237 A CN 96116237A CN 1135012 A CN1135012 A CN 1135012A
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Abstract
A repressurizing device composed of compressor and power source is installed between the first level separator and the convergence pipe of the original gas extracting system. The pressure of natural gas it self in the natural gas well is utilized to make it enter the repressurizing device to boost the low pressure natural gas, by said invention, 99% of the low pressure natural gas which is 40-50% of the total reserves in the well before extracting, can be extracted, so that the economic benefit is great.
Description
The present invention relates to natural gas well gas production method and device thereof, particularly natural gas well secondary gas recovery method and device thereof.
At present, the exploitation of the natural gas well is the gas pressure that utilizes in the natural gas well, directly the natural gas via pressure pipe is pressed into the method for gas production system, then outwards carries by pipeline.Used gas production system as shown in Figure 4, connects institute successively by christmas tree 1, pressure regulator valve 2, heating furnace 3, primary separator 4, header 5, second-stage separator 6 and efferent duct 7 and forms (as shown in Figure 4).
Because the natural gas well, through one section long period exploitation, reserves reduce gradually, strata pressure, bottom pressure, well head pressure all constantly descend, the output of gas well also constantly reduces, when well head pressure during less than gas collection header back pressure, just do not have natural gas and exported, this well is commonly referred to as low-pressure gas well, and low-pressure gas well just means that its no commercial mining has been worth.And well in the natural gas storage capacity, still for this well when unminding gross reserves 40～50% more than.Low-pressure gas well is to be developed by high-pressure gas well, and more and more many, so, and wouldn't is every mouthful of low-pressure gas well retained so a large amount of natural gas, can not waste for people benefit, be very unfortunate?
In view of this, purpose of the present invention is come out the natural gas extraction in the low-pressure gas well, benefits the people.
For reaching aforementioned purpose, the present invention is achieved in that
Natural gas well secondary gas recovery method is: utilize the gas pressure in the low pressure natural gas well, turn down pressure behind the christmas tree rear nozzle stage by stage, make it that suitable gas production be arranged, to self be pressed in the supercharging device, by natural gas compressor its compression is boosted, when boosting to greater than the header back pressure, natural gas can be pressed in the header of gas production system, export through pipeline again.
The device of natural gas well secondary gas recovery method: utilize original gas production system, only establish a supercharging device between a separator in this system and the header, this supercharging device comprises natural gas compressor and power source; Power source is a natural gas engine, or diesel engine, gasoline engine, motor etc., this supercharging device can utilize self pressure to be pressed into to compress to the natural gas of supercharging device and boost low pressure natural gas, make in its header that can be pressed into the gas production system and go, the setting pressure of header inlet is 19～30 atmospheric pressures, exports through second separator to efferent duct.Natural gas compressor import minimum pressure in the supercharging device is an atmospheric pressure.Therefore, the present invention can exploit out 99% more than again with retaining in the low-pressure gas well in the gas reserves of gross reserves 40～50% when unminding in the former well, then in the low-pressure gas well natural gas also there is not much left.
The present invention confirms through the test of certain oil field one gas production team: (1). in the gas reserves of the gross reserves of retaining in to low-pressure gas well 40～50%, extraction 99% more than again, is achieved.(2). the device of natural gas well secondary gas recovery method, in the process of boosting to low pressure natural gas, the amount of natural gas that is consumed is 1%～3% of a secondary gas recovery institute extraction amount of natural gas.
Advantage of the present invention:
1. the natural gas extraction of raw natural gas well can only get about 50% of its gross reserves, and the reserves about second half is worth because of no commercial mining, is shut and scraps.But the present invention can exploit out 99% more than again with nearly half the gross reserves natural gas of retaining in the raw natural gas well, that is to say: the natural gas gross reserves of raw natural gas well, can only get in the past its half about, and now 99% of desirable its gross reserves, former a bite natural gas well has just become two mouthfuls of natural gas wells.
2. how many low-pressure gas wells existing how many high-pressure gas wells in the whole nation then in the future just have, and new gas well successively constantly exploitation increase, then low-pressure gas well also constantly increases, should be in ten thousand more than its quantity; Therefore, economic benefit of the present invention is very huge, and in other words: originally the value of the natural gas of gas well exploitation is 1, again through the value of the present invention's natural gas that secondary recovery goes out in the raw natural gas well, and former no better than value of exploiting out natural gas 1.The natural gas of secondary recovery of the present invention makes the wealth of country be fully used on the one hand, avoids waste, benefits the people on the other hand, so social benefit is also not insignificant.
The present invention can also obtain further instruction from the following drawings and embodiment:
Fig. 1 is a natural gas well secondary gas recovery system schematic of the present invention.
Fig. 2 is a supercharging device schematic diagram among Fig. 1.
Fig. 3 is the schematic top plan view of Fig. 2.
Fig. 4 is existing with natural gas gas production system schematic.
The drawing explanation:
The 1-christmas tree, 2-pressure regulator valve, 3-heating furnace, 4-one eliminator, the 5-header, 6-second-stage separator, 7-efferent duct, 8-supercharging device, the 9-power source, 10-natural gas compressor, 11, the 19-low-voltage tube, 12,15-high-voltage tube, 13-battery group, 14-common base, the 16-filter core, 17-natural gas air inlet filter, 18-fuel air pipe, the 20-bypass valve, 21-elastic coupling, 22-engine fuel air inlet tube of pressure-stabilizing.
Below in conjunction with accompanying drawing embodiments of the invention are described in detail:
The present invention is a kind of natural gas well secondary gas recovery method and device thereof,
One, natural gas well secondary gas recovery method:
1. see also shown in Figure 1, open the pressure regulator valve 2 on the christmas tree 1, and turn down pressure behind christmas tree 1 rear nozzle, if the natural gas well mouth pressure of this low-pressure gas well be 5 atmospheric pressures (because the well head pressure of each low-pressure gas well is different or be 1,2,3,4,6 ... 10 atmospheric pressures), through heating furnace 3 and primary separator 4, enter secondary in the supercharging device 10 horizontal (perhaps vertical, one-level, three grades) natural gas compressor 10.
2. secondary horizontal (perhaps vertical, one-level, three grades) 10 pairs of low pressure natural gas that enter of natural gas compressor are compressed and are boosted, when 5 atmospheric pressures of low pressure natural gas well head are pressurized to greater than 19 (perhaps 20,21,22 ... 30) individual atmospheric pressure, promptly greater than the back pressure of header 5, go out secondary horizontal (perhaps vertical, one-level, three grades) natural gas compressor 10 and enter header 5, through second-stage separator 6 to efferent duct 7 outputs.
Two, the device of natural gas well secondary gas recovery method: a cover gas production system that utilizes original (high pressure gas production), only between the primary separator 4 of this system and header 5, establish a supercharging device 8, just formed " natural gas well secondary gas recovery system (as shown in Figure 1) of the present invention.This gas production system is by christmas tree 1, pressure regulator valve 2, heating furnace 3, primary separator 4, supercharging device 8, header 5, second-stage separator 6, efferent duct 7 and valve, instrument, by pipeline successively mutually polyphone form.Supercharging device 8 (shown in Fig. 2,3), by secondary horizontal (or secondary is vertical, one-level, three grades) natural gas compressor 10, be connected as a body through elastic coupling 21 and natural gas engine (or diesel engine, gasoline engine, motor) 9, and be contained in it with on the base 14; Secondary horizontal (or secondary is vertical, one-level, three grades) import of natural gas compressor 10 and the gas outlet of primary separator 4, fused by low-voltage tube 11, the outlet of secondary horizontal (or secondary is vertical, one-level, three grades) natural gas compressor 10 is connected through the import of high-voltage tube 12 with header 5; If the natural gas compressor of this embodiment 10 inlet pressures are 5 (perhaps 1,2,3,4,6 ... 10) individual atmospheric pressure, the back pressure of header 5 is 19 (perhaps 20,21,22 ... 30) individual atmospheric pressure, when 5 atmospheric pressure of low pressure natural gas are raised to greater than 19 atmospheric pressures, just enter in the header 5 by secondary horizontal (perhaps, vertical, one-level, three grades) natural gas compressor 10 outlets, again through second-stage separator 6 to efferent duct 7 outputs; On the low-voltage tube 19 of secondary horizontal (or secondary is vertical, one-level, three grades) natural gas compressor 10, be provided with natural gas air inlet filter 17, and filter core 16 also is housed in the natural gas air inlet filter 17; Fuel air pipe 18 1 terminates on the end of natural gas air inlet filter 17 of low-voltage tube 19, its other end is connected on the engine fuel air inlet tube of pressure-stabilizing 22, between air inlet tube of pressure-stabilizing 22 and natural gas engine 9, be provided with fuel air pipe 18, natural gas to air inlet tube of pressure-stabilizing 22, then enters the work done of burning in the natural gas engine 9 by engine fuel air inlet pipe 18; On the connecting leg of low-pressure inlet pipe 19 and high-pressure pipe 15, establish bypass pipe 20; Battery group 13 links to each other with the starter motor of natural gas engine 9.This is embodiment 1.
Embodiment 2: embodiment 2 is on the basis of embodiment 1, between the import of the outlet of primary separator 4 and secondary horizontal (or vertical, one-level, three grades) natural gas compressor 10, adorns a pressurizer tank, other device and embodiment 1 and 2 complete with.If the effect of pressurizer tank, be to make low pressure natural gas before entering secondary horizontal (or secondary is vertical, one-level) natural gas compressor 10, carry out a voltage stabilizing earlier, then enter secondary horizontal (or vertical, one-level) natural gas compressor 10 and compress and boost, this works more favourable to natural gas compressor 10 stably.
Claims (8)
1. natural gas well secondary gas recovery method: gas extraction is the pressure that utilizes the natural gas self in the natural gas well, open the pressure regulator valve (2) on the christmas tree (1), directly natural gas is pressed into gas producing device, then outwards carry by pressure pipeline, it is characterized in that: open the pressure regulator valve (2) on the christmas tree (1) of low pressure natural gas gas well, turn down pressure behind christmas tree (1) rear nozzle, utilize the pressure of low pressure natural gas self in the well, make it enter supercharging device (8) from primary separator (4), supercharging device (8) compresses the low pressure natural gas that has entered and boosts, boost to the inlet setting pressure of header (5) when low pressure natural gas after, then boosted natural gas goes out supercharging device (8) and enters header (5), through second-stage separator (6) to efferent duct (7).
2. natural gas well secondary gas recovery method according to claim 1 is characterized in that: header (5) inlet setting pressure is between 19～30 atmospheric pressure.
3. natural gas well secondary gas recovery method according to claim 1 is characterized in that: the import minimum pressure of the natural gas compressor (10) of supercharging device (8) is an atmospheric pressure.
4. the device for realization natural gas well secondary gas recovery method comprises primary separator (4) and header (5), it is characterized in that: between primary separator (4) and header (5), be provided with supercharging device (8).
5. the device of natural gas well secondary gas recovery method according to claim 4, it is characterized in that: supercharging device (8) comprising: natural gas compressor (10) and power source (9), the gas outlet of the import of natural gas compressor (10) and primary separator (4), fuse through low-voltage tube (11), and the outlet of natural gas compressor (10) is connected by the import of high-voltage tube (12) with header (5).
6. the device of natural gas well secondary gas recovery method according to claim 4 is characterized in that: natural gas compressor (10) is the horizontal natural gas compressor of secondary or secondary vertical natural gas compressor, one-level natural gas compressor, three grades of natural gas compressors.
7. the device of natural gas well secondary gas recovery method according to claim 4 is characterized in that: power source (9) is natural gas engine or diesel engine, gasoline engine, motor.
8. the device of natural gas well secondary gas recovery method according to claim 4 is characterized in that: also pressurizer tank can be housed between the import of the gas outlet of primary separator (4) and natural gas compressor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96116237 CN1135012A (en) | 1996-02-01 | 1996-02-01 | Method and apparatus for secondery obtg. gas from natural gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96116237 CN1135012A (en) | 1996-02-01 | 1996-02-01 | Method and apparatus for secondery obtg. gas from natural gas well |
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| Publication Number | Publication Date |
|---|---|
| CN1135012A true CN1135012A (en) | 1996-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 96116237 Pending CN1135012A (en) | 1996-02-01 | 1996-02-01 | Method and apparatus for secondery obtg. gas from natural gas well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460747C (en) * | 2007-07-13 | 2009-02-11 | 辽河石油勘探局 | Natural gas unloading system pipe network improving and released cold quantity utilizing technology |
| CN103912253A (en) * | 2014-03-20 | 2014-07-09 | 西安长庆科技工程有限责任公司 | Gas well single well gas recovery system and low-pressure recovery method thereof |
-
1996
- 1996-02-01 CN CN 96116237 patent/CN1135012A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460747C (en) * | 2007-07-13 | 2009-02-11 | 辽河石油勘探局 | Natural gas unloading system pipe network improving and released cold quantity utilizing technology |
| CN103912253A (en) * | 2014-03-20 | 2014-07-09 | 西安长庆科技工程有限责任公司 | Gas well single well gas recovery system and low-pressure recovery method thereof |
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