CN102322568B - Natural gas and gas condensate metering and distribution method - Google Patents
Natural gas and gas condensate metering and distribution method Download PDFInfo
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- CN102322568B CN102322568B CN 201110127451 CN201110127451A CN102322568B CN 102322568 B CN102322568 B CN 102322568B CN 201110127451 CN201110127451 CN 201110127451 CN 201110127451 A CN201110127451 A CN 201110127451A CN 102322568 B CN102322568 B CN 102322568B
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Abstract
The invention relates to a natural gas distribution system, in particular to a natural gas and gas condensate metering and distribution method. The natural gas and gas condensate metering and distribution method is characterized in that: the output end of a block gas collection unit communicates with the input end of a block preseparator, the output end of the block preseparator respectively communicates with the input end of a block raw natural gas metering and component analysis unit and the input end of a gas condensate stabilization unit, the output end of the block raw natural gas metering and component analysis unit communicates with the input end of a natural gas purification unit, the output end of the natural gas purification unit communicates with the input end of a marketable natural gas metering and component analysis unit, the output end of the marketable natural gas metering and component analysis unit communicates with a marketable natural gas conveying pipeline, and the output end of the gas condensate stabilization unit communicates with the input end of a stabilized gas condensate metering unit. The natural gas and gas condensate metering and distribution method effectively solves the problem on how to meter and distribute marketable natural gas and gas condensate as byproduct, expands the scale, reduces the cost, and increases the benefit.
Description
Technical field
The present invention relates to a kind of natural gas distribution device, particularly a kind of rock gas, condensate-oil metering distribution method.
Background technique
Along with socioeconomic development, rock gas is as clean energy resource, and demand is increasing, and the construction of natural gas fields also enters the fast-developing phase, the injection of domestic, international funds, and the domestic cooperation of rock gas and international cooperation exploration project are more and more.
The pattern of natural gas cooperation exploitation generally is in same gas field, marks off several and has the zone that exploitation is worth, and is invested and developed by different investors.Each investor independently builds natural gas extraction, processing, the needed every facility of conveying, makes exploitation rock gas out be sold to downstream user under the condition that satisfies national commodity gas index.
Therefore, at same gas field Cooperative District, generally there are two and above investor to develop, because geological condition is basic identical, natural gas processing, outer communication system process program, the technology path built separately are basic identical, cause processings, the outer facility repeated construction such as defeated or construction scale little, and how investment is high, the construction period is long, the management point problem such as, be unfavorable for investor's maximizing the benefits, affect the Economy of project.
Summary of the invention
The objective of the invention is: a kind of rock gas, condensate-oil metering distribution method are provided, effectively solve metering, the allocation problem of commercial natural gas and by-product condensate.
Technological scheme of the present invention is: relate to a kind of rock gas, the condensate-oil metering distribution method, it comprises block gas collection unit, the block preseparator, block raw natural gas metering component analysis unit, the natural gas purification processing unit, commercial natural gas metering component analysis unit, the commercial natural gas conveyance conduit, condensate stabilization unit and stabilized condensate batching unit, it is characterized in that: block gas collection unit output terminal is communicated with block preseparator input end, block preseparator output terminal is communicated with respectively with block raw natural gas metering component analysis unit input end and condensate stabilization unit input end, block raw natural gas metering component analysis unit output terminal is communicated with natural gas purification processing unit input end, natural gas purification processing unit output terminal is communicated with commercial natural gas metering component analysis unit input end, and commercial natural gas metering component analysis unit is inputted out to hold in the commercial natural gas conveyance conduit and is communicated with; Condensate stabilization unit output terminal is communicated with stabilized condensate batching unit input end; Natural gas purification processing unit and condensate stabilization unit interconnect.
Described block gas collection unit, block preseparator and block raw natural gas metering component analysis unit arrange according to number of blocks, and the block preseparator output terminal of each block is communicated with end with the input of condensate stabilization unit and interconnects respectively; The block raw natural gas metering component analysis unit output terminal of each block is communicated with end with the input of natural gas purification processing unit and interconnects.
Described block raw natural gas metering component analysis unit is made of natural gas flowmeter and the connection of full constituent ANALYZER.
Described commercial natural gas metering component analysis unit is made of natural gas flowmeter and the connection of full constituent ANALYZER.
Described stabilized condensate batching unit comprises the condensate flowmeter.
Block gas collection unit, block preseparator and block raw natural gas metering component analysis unit are arranged according to block, and the condensation oil mass of i block is O
C* O
i/ (O
1+ O
2+ O
3+ ...); The i block calculates condensation oil mass O
i=G
i* (W
I4* M
I4+ W
I5* M
I5+ W
I6* M
I6)-(G
i* G
C/ (G
1+ G
2+ G
3+ ... )) * (W
C4* M
C4+ W
C5* M
C5+ W
C6* M
C6), O
CBe total stabilized condensate amount of selling, W refers at the metering of gas field raw natural gas and component analysis device, the gas volume percentage that the full constituent ANALYZER of commercial natural gas metering and component analysis device gathers, and M refers to the density of the gas under the corresponding operating mode.
The metering of described condensate, distribution adopt " theory of computation condensation oil mass, distribution stabilized condensate amount " principle to carry out, according to the theoretical condensation oil mass that the raw natural gas amount that measures and calculation go out, the stabilized condensate amount that distribution and computation goes out.
The metering of described rock gas, distribute to adopt " metering virgin gas, distribute commodity gas " principle to carry out, the commodity gas that measures according to the pro rate of the virgin gas that measures.
Described natural gas distribution mode is, a total quantity I block counts, and the commercial natural gas of i block is G
i* G
C/ (G
1+ G
2+ G
3+ ...), G
iBe block material gas quantity, G
CBe total commodity tolerance.
Characteristics of the present invention are: the present invention has solved metering, the allocation problem of commercial natural gas and by-product condensate effectively, can realize the construction of many investor's joint investments, common processing, the outer defeated facility of using, to improve unit scale, avoid overlapping construction, the method of salary distribution is accurate, simple, easy operating, reduce Investment in Gas Field Development, increase economic efficiency.
Description of drawings
The present invention will be further described below in conjunction with embodiment's accompanying drawing:
Fig. 1 is rock gas, condensate-oil metering dispensing device structural representation.
Fig. 2 is rock gas, the condensate-oil metering dispensing device structural representation in two zones.
Fig. 3 is rock gas, the condensate-oil metering dispensing device structural representation in three zones.
Among the figure: 1, block gas collection unit, 2, the block preseparator; 3, block raw natural gas metering component analysis unit; 4, natural gas purification processing unit; 5, commercial natural gas metering component analysis unit; 6, commercial natural gas conveyance conduit; 7, condensate stabilization unit; 8, stabilized condensate batching unit.
Embodiment
Embodiment 1
As shown in Figure 1, block gas collection unit output terminal 1 is communicated with block preseparator 2 input ends, block preseparator 2 output terminals are communicated with respectively with block raw natural gas metering component analysis unit 3 input ends and condensate stabilization unit 7 input ends, block raw natural gas metering component analysis unit 3 output terminals are communicated with natural gas purification processing unit 4 input ends, natural gas purification processing unit 4 output terminals are communicated with commercial natural gas metering component analysis unit 5 input ends, and commercial natural gas metering component analysis unit 5 is inputted out to hold in commercial natural gas conveyance conduit 6 and is communicated with; Condensate stabilization unit 7 output terminals are communicated with stabilized condensate batching unit 8 input ends; Natural gas purification processing unit 4 interconnects with condensate stabilization unit 7.
Block raw natural gas metering component analysis unit 3 is made of natural gas flowmeter and the connection of full constituent ANALYZER.
Commercial natural gas metering component analysis unit 5 is made of natural gas flowmeter and the connection of full constituent ANALYZER.The commodity gas tolerance of commercial natural gas metering component analysis unit 5 accurate-meterings through pooling together after processing is as dividing distribution capacity and real-time in-line testing, analysis gas component.
Stabilized condensate batching unit 8 comprises the condensate flowmeter, and the export sales of stabilized condensate batching unit 8 accurate-metering stabilized condensates is as the final sendout of gas by-products.
The metering of rock gas, distribute to adopt " metering virgin gas, distribute commodity gas " principle to carry out, the commodity gas that measures according to the pro rate of the virgin gas that measures; The metering of condensate, distribution adopt " theory of computation condensation oil mass, distribution stabilized condensate amount " principle to carry out, according to the theoretical condensation oil mass that the raw natural gas amount that measures and calculation go out, the stabilized condensate amount that distribution and computation goes out.
The magnitude setting of block gas collection unit 1, block preseparator 2 and block raw natural gas metering component analysis unit 3 is 1.
When only having a block, commercial natural gas is G
1* G
C/ G
1=G
C, the condensation oil mass is O
C* O
1/ O
1=O
C
Block comes gas to pass through respectively block preseparator 2, then respectively the virgin gas after separating is measured and component analysis through raw natural gas metering component analysis device 3, obtains respectively block material gas quantity G
1With component T
1Virgin gas after the metering is after installing 4 purified treatment, and commercial natural gas enters metering and component analysis device 5 measures and analyzes, and obtains the commodity gas G that block adds up to
CWith component T
CSo, be G owing to only have a block to add up to commodity gas
1, component is T
1
The condensate that block preseparator 2 and natural gas purification processing unit 4 are separated after reaching relevant national standard and requiring, enters 8 meterings of stabilized condensate batching unit after condensate stabilization unit 7 is stable, obtain the stabilized condensate O that block adds up to
C
Embodiment 2
As shown in Figure 2, take 2 blocks as example, be respectively A district and B district, present embodiment and embodiment's 1 structure is basic identical, different is each block is respectively arranged with block gas collection unit 1, block preseparator 2 and block raw natural gas metering component analysis unit 3 each one.
In each block, block gas collection unit 1 output terminal is communicated with block preseparator 2 input ends, and block preseparator 2 output terminals are communicated with block raw natural gas metering component analysis unit 3 input ends; Each block preseparator 2 output terminal is communicated with condensate stabilization unit 7 input ends, and each block raw natural gas metering component analysis unit 3 is communicated with natural gas purification processing unit 4 input ends.Satisfied the raw natural gas of natural gas processing requirement, classification is delivered to the natural gas treatment plant that shares under the same operating.
The rock gas in A district and B district, the concrete method of salary distribution of condensate are as follows:
1, natural gas distribution mode
Because it is little that same gas field rock gas forms difference, and the domestic volume metering method that all adopts, metering distributes the difference that can not consider gas component, and A, B two block commercial natural gas amounts are:
1. commercial natural gas=the G of A block
A* G
C/ (G
A+ G
B);
2. commercial natural gas=the G of B block
B* G
C/ (G
A+ G
B).
2, the condensate method of salary distribution
Condensate generally adopts Weighing, and gas component is larger to the assignment affects of condensate, need to consider the impact of component in minute timing.
Because the full constituent ANALYZER is generally measured C1～C6+, condensate component after stable is C4～C6+, calculate respectively first the total amount of A, B block raw natural gas C4～C6+ and compile after the total amount of commercial natural gas C4～C6+, calculate respectively in theory isolated condensation oil mass of A, B block, carry out export trade stabilized condensate O with the ratio of this amount of calculation
CDistribution.That is:
1. the condensation oil mass=O of A block
C* O
A/ (O
A+ O
B);
2. the condensation oil mass=O of B block
C* O
B/ (O
A+ O
B).
In the formula,
The A block calculates condensation oil mass O
A=G
A* (W
A4* M
A4+ W
A5* M
A5+ W
A6* M
A6)-(G
A* G
C/ (G
A+ G
B)) * (W
C4* M
C4+ W
C5* M
C5+ W
C6* M
C6)
The B block calculates condensation oil mass O
B=G
B* (W
B4* M
B4+ W
B5* M
B5+ W
B6* M
B6)-(G
B* G
C/ (G
A+ G
B)) * (W
C4* M
C4+ W
C5* M
C5+ W
C6* M
C6)
Following formula W refers to the gas volume percentage that the full constituent ANALYZER in gas field raw natural gas metering component analysis device 3A, 3B and commercial natural gas metering component analysis unit 5 gathers, such as W
A4Refer to A block virgin gas (A in the formula), in the C4(formula 4) percentage by volume.
Following formula M refers to that under the corresponding operating mode, the density of gas is such as M
A4Refer to A block preseparator outlet port (A in the formula), in the C4(formula 4) density.
The computing cycle of W and mode: device 3A, 3B and 5 amounts to the full constituent ANALYZER at 3 places and measures 1 gas component (data acquiring frequency can according to circumstances be adjusted) at the integral point of every day simultaneously, gather simultaneously the instantaneous flow at 3 places of this moment, the mean value that calculates one month (time can according to circumstances be adjusted) according to average weighted mode measures distribution as the value of this month W.
During operation, (distribute two blocks as example take metering, be respectively A block and B block), A, B block come gas to pass through respectively preseparator 2A, 2B, then respectively the virgin gas after separating is measured and component analysis with component analysis device 3A, 3B through the raw natural gas metering, obtain respectively A block material gas quantity G
AWith component T
AAnd B block material gas quantity G
BWith component T
BVirgin gas after the metering is after installing 4 purified treatment, and commercial natural gas enters metering and component analysis device 5 measures and analyzes, and obtains the commodity gas G of A, B two blocks total
CWith component T
C
The condensate that preseparator 2A, 2B and natural gas purification processing unit 4 are separated is after condensate stabilization unit 7 is stablized, after reaching the relevant national standard requirement, enter 8 meterings of stabilized condensate batching unit, obtain the stabilized condensate O of A, B two blocks total
C
Embodiment 3
As shown in Figure 3, take three blocks as example, present embodiment and embodiment's 1 structure are basic identical, different is according to number of blocks, three block gas collection unit 1, three block preseparators 2 and three block raw natural gas are set to be measured and component analysis device 3, a block gas collection unit 1 is communicated with 2, one block preseparators 2 and is communicated with 3 with a block raw natural gas metering and component analysis device with a block preseparator.
Each block preseparator 2 output terminal is communicated with condensate stabilization unit 7 input ends, and condensate stabilization unit 7 output terminals are communicated with stabilized condensate batching unit 8 input ends.
Each block raw natural gas metering component analysis unit 3 output terminal is communicated with natural gas purification processing unit 4 input ends, is communicated with commercial natural gas metering and component analysis device 5, commercial natural gas conveyance conduit 6 successively behind the natural gas purification processing unit 4.
In sum, block gas collection of the present invention unit 1, block preseparator 2 and block raw natural gas metering component analysis unit 3 arrange according to number of blocks, share a cover natural gas purification processing unit 4, commercial natural gas metering component analysis unit 5, commercial natural gas conveyance conduit 6, condensate stabilization unit 7 and stabilized condensate batching unit 8
Each block natural gas distribution mode, parameter be in the following manner:
Commercial natural gas: G
i* G
C/ (G
1+ G
2+ G
3+ ...);
Condensation oil mass: O
C* O
i/ (O
1+ O
2+ O
3+ ...);
Calculate condensation oil mass: O
i=G
i* (W
I4* M
I4+ W
I5* M
I5+ W
I6* M
I6)-(G
i* G
C/ (G
1+ G
2+ G
3+ ... )) * (W
C4* M
C4+ W
C5* M
C5+ W
C6* M
C6).
Wherein, O
CBe total stabilized condensate amount of selling, W refers at the metering of gas field raw natural gas and component analysis device, the gas volume percentage that the full constituent ANALYZER of commercial natural gas metering and component analysis device gathers, and M refers to the density of the gas under the corresponding operating mode.
Claims (7)
1. rock gas, the condensate-oil metering distribution method, it comprises block gas collection unit (1), block preseparator (2), block raw natural gas metering component analysis unit (3), natural gas purification processing unit (4), commercial natural gas metering component analysis unit (5), commercial natural gas conveyance conduit (6), condensate stabilization unit (7) and stabilized condensate batching unit (8), it is characterized in that: block gas collection unit output terminal (1) is communicated with block preseparator (2) input end, block preseparator (2) output terminal is communicated with respectively with block raw natural gas metering component analysis unit (3) input end and condensate stabilization unit (7) input end, block raw natural gas metering component analysis unit (3) output terminal is communicated with natural gas purification processing unit (4) input end, natural gas purification processing unit (4) output terminal is communicated with commercial natural gas metering component analysis unit (5) input end, and commercial natural gas metering component analysis unit (5) input end is communicated with commercial natural gas conveyance conduit (6); Condensate stabilization unit (7) output terminal is communicated with stabilized condensate batching unit (8) input end; Natural gas purification processing unit (4) interconnects with condensate stabilization unit (7).
2. a kind of rock gas according to claim 1, condensate-oil metering distribution method, it is characterized in that: described block gas collection unit (1), block preseparator (2) and block raw natural gas metering component analysis unit (3) arrange according to number of blocks, and block preseparator (2) output terminal of each block and condensate stabilization unit (7) input end interconnect respectively; Block raw natural gas metering component analysis unit (3) output terminal and natural gas purification processing unit (4) input end of each block interconnect.
3. a kind of rock gas according to claim 1, condensate-oil metering distribution method is characterized in that: described block raw natural gas metering component analysis unit (3) is communicated with by natural gas flowmeter and full constituent ANALYZER and consists of.
4. a kind of rock gas according to claim 1, condensate-oil metering distribution method is characterized in that: described commercial natural gas metering component analysis unit (5) is communicated with by natural gas flowmeter and full constituent ANALYZER and consists of.
5. a kind of rock gas according to claim 1, condensate-oil metering distribution method, it is characterized in that: described stabilized condensate batching unit (8) comprises the condensate flowmeter.
6. a kind of rock gas according to claim 5, condensate-oil metering distribution method, it is characterized in that: the metering of condensate, distribution adopt " theory of computation condensation oil mass, distribution stabilized condensate amount " principle to carry out, according to the theoretical condensation oil mass that the raw natural gas amount that measures and calculation go out, the stabilized condensate amount that distribution and computation goes out.
7. according to claim 3 or 4 described a kind of rock gases, condensate-oil metering distribution method, it is characterized in that: the metering of rock gas, distribute to adopt " metering raw natural gas, distribute commercial natural gas " principle to carry out, the commercial natural gas that measures according to the pro rate of the raw natural gas that measures.
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| CN102777767B (en) * | 2012-08-08 | 2014-07-02 | 中国海洋石油总公司 | Dry and wet natural gas combined transportation energy metering and distributing method and system |
| CN104806889A (en) * | 2015-04-22 | 2015-07-29 | 中国石油大学(北京) | Monitoring method and monitoring device for pipeline transmission loss of gas long-distance transmission pipeline |
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