CN108843302A - A kind of gas well yield splits a point method - Google Patents
A kind of gas well yield splits a point method Download PDFInfo
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- CN108843302A CN108843302A CN201810732752.5A CN201810732752A CN108843302A CN 108843302 A CN108843302 A CN 108843302A CN 201810732752 A CN201810732752 A CN 201810732752A CN 108843302 A CN108843302 A CN 108843302A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 235000020681 well water Nutrition 0.000 claims abstract description 21
- 239000002349 well water Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000004457 water analysis Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims 14
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- 238000004364 calculation method Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
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Abstract
The invention discloses a kind of gas well yields to split a point method, it is equal to the adduction of all individual well ionic weights using the total amount of each ion of gas gathering station, gas gathering station water yield is split and assigns to every mouthful of individual well, assuming that the same gas gathering station have under its command individual well water-gas ratio it is identical under the premise of, gas gathering station total gas production is split in proportion according to individual well water yield and assigns to every mouthful of individual well.Gas well yield of the present invention splits point method and utilizes material balance rule, by solving multi head linear equation group, and then it splits and gets every mouthful of single well yield, calculation method is simple, it is easily achieved, the gas well for more wells concatenation, big well from concatenation metering or without metering, yield determination provides a kind of reasonable calculation method, it can be accurately obtained gas well yield, provide technical support for single well analysis and gas well precision management.
Description
Technical field
The invention belongs to gas reservoir engineering technical fields, and in particular to a kind of gas well yield splits a point method, be suitable for well head without
The well yield of metering determines.
Background technique
Sulige gas field large-scale low-cost of reviving is developed, and gas well mostly uses collecting well group, and individual well well head does not install flowmeter,
Gas well total output is uniformly measured by gas gathering station, causes that gas output per well is unknown, is unfavorable for the analysis and management of gas well.Soviet Union at present
Sulige gas field well yield is split point mainly using open-flow capacity method, and this method is according to individual well gas testing open-flow capacity by gas gathering station
Total gas production is split in proportion assigns to each well, and part individual well is verified using Single Gas Well.This complete foundation of method split point
The good correlation of the accuracy of Absolute Open Flow of Gas Wells and open-flow capacity and yield, but revive Sulige gas field individual well open-flow capacity
Calculating is inaccurate, and revive Sulige gas field individual well open-flow capacity and the correlation of gas well yield it is very poor, open-flow capacity can not
Gas well capacity is represented, so split that point error is very big to gas well yield using open-flow capacity, the knot that causes gas well yield to split point
Fruit is inaccurate.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of suitable for well
Mouth production split method of the individual well without metering, by the corresponding relationship of individual well salinity and gas gathering station total salinity, by gas gathering station
Total output accurately split and assign to every mouth individual well, achieve the purpose that implement every implication well well yield, be provided for single well analysis
Foundation lays the foundation for gas well precision management.
The present invention uses following technical scheme：
A kind of gas well yield splits a point method, and the adduction of all individual well ionic weights is equal to using the total amount of each ion of gas gathering station,
Gas gathering station water yield is split and assigns to every mouthful of individual well, assuming that the same gas gathering station have under its command individual well water-gas ratio it is identical under the premise of, press
Gas gathering station total gas production is split in proportion according to individual well water yield and assigns to every mouthful of individual well.
Specifically, including the following steps：
S1, in gas gathering station water yield it is known that establishing gas gathering station water yield S equation under individual well water yield unknown situation；
S2, dynamic monitoring information, foundation gas gathering station and individual well water analysis, using same mass of ion conservation original are utilized
Then, according to gas gathering station water yield S establishing equation equation group in step S1, equation quantity is n+1, S1, the S2 ... being calculated
Sn value；
S3, assuming that S1, S2 ... the Sn being calculated in the identical situation of each well water-gas ratio of gas gathering station by step S2
Value, converts each gas output per well Qn in proportion, obtains each well yield.
Further, in step S1, gas gathering station water yield S is specific as follows：
S=S1+S2+ ... Sn
Wherein, S1 indicates the 1st mouthful of well water yield；S2 indicates the 2nd mouthful of well water yield；Sn indicates n-th mouthful of well water yield；N table
Show gas gathering station individual well quantity.
Further, in step S2, if ionic species measured by water analysis is x, as x >=n-1, solving equations are obtained
To S1, S2 ... Sn value.
Further, equation group is specific as follows：
Wherein, a indicates a ion gas gathering station total salinity；A1 indicates a ion in the 1st mouthful of well salinity；A2 indicates a ion
In the 2nd mouthful of well salinity；An indicates a ion in n-th mouthful of well salinity；B indicates b ion gas gathering station total salinity；B1 indicate b from
Son is in the 1st mouthful of well salinity；B2 indicates b ion in the 2nd mouthful of well salinity；Bn indicates b ion in n-th mouthful of well salinity；Y is indicated
Y ion gas gathering station total salinity；Y1 indicates y ion in the 1st mouthful of well salinity；Y2 indicates y ion in the 2nd mouthful of well salinity；yn
Indicate y ion in n-th mouthful of well salinity.
Further, in step S3, n-th mouthful of well yield Qn is specific as follows：
Wherein, Sn indicates the water yield of n-th mouthful of well；Q indicates gas gathering station total gas production；S indicates the total water yield of gas gathering station.
Compared with prior art, the present invention at least has the advantages that：
Gas well yield of the present invention splits point method using material balance rule, is calculated by gas well output water intermediate ion amount conservation
The water yield of every implication well, and then split and get every mouthful of single well yield, this method principle is reliable, by solving polynary first power
Journey group, calculation method are simple, it is easy to accomplish.
Further, the present invention splits the well yield got, and accuracy rate is higher than to split by open-flow capacity and get
Yield, for Single Gas Well analysis and gas well management have important directive significance.
Further, gas gathering station water yield S is set, according to certain ion total salinity of gas gathering station, can be calculated each
The total amount of kind ion establishes gas gathering station total ion concentration equal to each individual well total ion concentration adduction then according to material balance legal system
Equation provides equation for equation group, solves each individual well and splits a point yield.
Further, S1, S2 ... Sn are set, characterizes the gas gathering station and has individual well water yield under its command, obtained by solve system of equation
To the water yield of each individual well, the same gas gathering station have under its command individual well water-gas ratio it is identical under the premise of, pass through obtained individual well and produce water
What amount accounting solved to obtain individual well splits a point yield.
Further, well head production Q n is that individual well finally splits the yield got, and is by solving multi head linear equation group
After obtaining individual well water yield, according to water yield accounting, the gas output per well got is split, to realize that gas gathering station well yield is split
Point.
In conclusion gas well yield of the present invention splits point method using material balance rule, by solving multi head linear equation
Group, and then split and get every mouthful of single well yield, calculation method is simple, it is easy to accomplish, it is measured for more wells concatenation, big well from concatenation
Or the gas well without metering, yield determination provide a kind of reasonable calculation method, can be accurately obtained gas well yield, are single
Well analysis and gas well precision management provide technical support.
Below by embodiment, technical scheme of the present invention will be described in further detail.
Specific embodiment
The present invention provides a kind of gas well yields to split a point method, utilizes material balance rule, the total amount of each ion of gas gathering station
Equal to the adduction of all individual well ionic weights, gas gathering station water yield is split according to this method and assigns to every mouthful of individual well, assuming that same
A gas gathering station have under its command individual well water-gas ratio it is identical under the premise of, gas gathering station total gas production is split point in proportion according still further to individual well water yield
Onto every mouthful of individual well.
A kind of gas well yield of the present invention splits a point method, includes the following steps：
S1, in gas gathering station water yield it is known that establishing equation under individual well water yield unknown situation
S=S1+S2+ ... Sn (1)
Wherein, S indicates gas gathering station water yield (L)；S1 indicates the 1st mouthful of well water yield (L)；S2 indicates the 2nd mouthful of well water yield
(L)；Sn indicates n-th mouthful of well water yield (L)；N indicates gas gathering station individual well quantity.
S2, dynamic monitoring information, foundation gas gathering station and individual well water analysis, using same mass of ion conservation original are utilized
Then, simultaneous formula 1, establishes equation group, and equation quantity is n+1.
Wherein, a indicates a ion gas gathering station total salinity (mg/L)；A1 indicates a ion in the 1st mouthful of well salinity (mg/L)；
A2 indicates a ion in the 2nd mouthful of well salinity (mg/L)；An indicates a ion in n-th mouthful of well salinity (mg/L)；B indicates b ion
Gas gathering station total salinity (mg/L)；B1 indicates b ion in the 1st mouthful of well salinity (mg/L)；B2 indicates b ion in the 2nd mouthful of Jing Kuang
Change degree (mg/l)；Bn indicates b ion in n-th mouthful of well salinity (mg/L)；Y indicates y ion gas gathering station total salinity (mg/L)；y1
Indicate y ion in the 1st mouthful of well salinity (mg/L)；Y2 indicates y ion in the 2nd mouthful of well salinity (mg/L)；Yn indicates that y ion exists
N-th mouthful of well salinity (mg/L)；
If ionic species measured by water analysis is x, Sn value that solving equations obtain S1, S2 as x >=n-1 ....
S3, assuming that S1, the S2 ... being calculated in the identical situation of each well water-gas ratio of gas gathering station by solving equations 2
Sn value converts each gas output per well Qn (n-th mouthful of well production) according to formula 3 in proportion, obtains each well yield；
Wherein, Qn indicates n-th mouthful of well yield (104m3/d)；Sn indicates the water yield (L) of n-th mouthful of well；Q indicates gas gathering station
Total gas production (104m3/d)；S indicates the total water yield of gas gathering station (L).
It is as follows that each individual well that calculation method is calculated through the invention splits point rate schedule：
| Serial number | Pound sign | Calculate gas output per well (104m3/d) |
| 1 | Soviet Union's X-X well | 1.27 |
| 2 | Soviet Union's X-X well | 1.03 |
| 3 | Soviet Union's X-X well | 0.41 |
| 4 | Soviet Union's X-X well | 2.38 |
| 5 | Soviet Union's X-X well | 1.07 |
| 6 | Soviet Union's X-X well | 0.99 |
| 7 | Soviet Union's X-X well | 0.62 |
| 8 | Soviet Union's X-X well | 1.72 |
| 9 | Soviet Union's X-X well | 0.94 |
| 10 | Soviet Union's X-X well | 1.15 |
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.The component of the embodiment of the present invention being described and shown in usually here can pass through a variety of different configurations
To arrange and design.Therefore, the detailed description of the embodiment of the present invention of offer is not intended to limit below claimed
The scope of the present invention, but it is merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
Assuming that certain gas gathering station shares 5 mouthfuls of individual well, gas gathering station produces water 100L daily, and gas gathering station produces tolerance 10 × 10 daily4m3/ d, collection
Gas station individual well and gas gathering station Analysis Results of Water Quality such as table 1 split point according to table 1 to gas gathering station well yield.
Table 1 is gas gathering station individual well salinity and gas gathering station total salinity
The first step：It is established an equation group according to salinity table
6000 × a+9000 × b+3000 × c+4000 × d+5000 × e=100 × 5550 are 1.
8000 × a+12000 × b+2000 × c+3000 × d+7000 × e=100 × 6550 are 2.
400 × a+1000 × b+200 × c+300 × d+200 × e=100 × 445 are 3.
10 × a+5 × b+2 × c+10 × d+10 × e=100 × 7.8 are 4.
A+b+c+d+e=100 is 5.
Second step：Above equation group is solved, is obtained：
A=30, b=20, c=15, d=25, e=10；
In formula：A, b, c, d, e respectively indicate the water yield per day of corresponding individual well.
Third step：A well yield is solved, result is obtained：
Qa=30/100 × 10=3 × 104m3/d；
Qb=20/100 × 10=2 × 104m3/d；
Qc=15/100 × 10=1.5 × 104m3/d；
Qd=25/100 × 10=2.5 × 104m3/d；
Qe=10/100 × 10=1 × 104m3/d；
It revives the * * gas gathering station experimental result table of comparisons, which has 10 mouthfuls of individual wells, and calculation method is split point respectively through the invention
Gas output per well obtains result；Single amount is carried out to each individual well simultaneously, obtaining gas well, actually accurate gas output per well, the two are right
Than discovery, the result that the present invention calculates differs very little with actual result, and error is within 10%, it was demonstrated that calculating side of the invention
Method can carry out production split to gas gathering station gas well.
Each individual well of gas gathering station utilizes the principle of material balance in the case where no well head measures through the invention, can be with
Gas gathering station yield is split respectively and assigns to each individual well up, individual well has been accurately obtained and has split a point yield；This method principle is simple, is easy to
It realizes, provides technical support for single well analysis.Following table is verified to the method for the present invention as a result, by every test parameter column side
Journey group carries out production split to 10 mouthfuls of individual wells of the gas gathering station, specific as follows：
Show that point result is split in calculating through the invention according to the calculated result of upper table to differ with practical gas well list amount actual value
Within 10%, the present invention has very high accuracy, it was demonstrated that the present invention splits point with good applicability gas gathering station individual well.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (6)
1. a kind of gas well yield splits a point method, which is characterized in that be equal to all individual well ions using the total amount of each ion of gas gathering station
Gas gathering station water yield is split and assigns to every mouthful of individual well by the adduction of amount, assuming that the same gas gathering station to have individual well water-gas ratio under its command identical
Under the premise of, gas gathering station total gas production is split in proportion according to individual well water yield and assigns to every mouthful of individual well.
2. a kind of gas well yield according to claim 1 splits a point method, which is characterized in that include the following steps：
S1, in gas gathering station water yield it is known that establishing gas gathering station water yield S equation under individual well water yield unknown situation；
S2, using dynamic monitoring information, according to gas gathering station and individual well water analysis, using same mass of ion conserva-tion principle,
According to gas gathering station water yield S establishing equation equation group in step S1, equation quantity is n+1, S1, S2 ... the Sn being calculated
Value；
S3, assuming that S1, S2 ... the Sn value being calculated in the identical situation of each well water-gas ratio of gas gathering station by step S2, are pressed
Ratio converts each gas output per well Qn, obtains each well yield.
3. a kind of gas well yield according to claim 2 splits a point method, which is characterized in that in step S1, gas gathering station produces water
It is specific as follows to measure S：
S=S1+S2+ ... Sn
Wherein, S1 indicates the 1st mouthful of well water yield；S2 indicates the 2nd mouthful of well water yield；Sn indicates n-th mouthful of well water yield；N indicates collection
Gas station individual well quantity.
4. a kind of gas well yield according to claim 2 splits a point method, which is characterized in that in step S2, if water analysis
Measured ionic species is x, Sn value that solving equations obtain S1, S2 as x >=n-1 ....
5. a kind of gas well yield according to claim 4 splits a point method, which is characterized in that equation group is specific as follows：
S × a=S1 × a1+S2 × a2+ ... Sn × an
S × b=S1 × b1+S2 × b2+ ... Sn × bn
S × y=S1 × y1+S2 × y2+ ... Sn × yn
S=S1+S2+ ... Sn
Wherein, a indicates a ion gas gathering station total salinity；A1 indicates a ion in the 1st mouthful of well salinity；A2 indicates a ion the 2nd
Mouth well salinity；An indicates a ion in n-th mouthful of well salinity；B indicates b ion gas gathering station total salinity；B1 indicates that b ion exists
1st mouthful of well salinity；B2 indicates b ion in the 2nd mouthful of well salinity；Bn indicates b ion in n-th mouthful of well salinity；Y indicate y from
Sub- gas gathering station total salinity；Y1 indicates y ion in the 1st mouthful of well salinity；Y2 indicates y ion in the 2nd mouthful of well salinity；Yn is indicated
Y ion is in n-th mouthful of well salinity.
6. a kind of gas well yield according to claim 2 splits a point method, which is characterized in that in step S3, the production of n-th mouthful of well
It is specific as follows to measure Qn：
Wherein, Sn indicates the water yield of n-th mouthful of well；Q indicates gas gathering station total gas production；S indicates the total water yield of gas gathering station.
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