CN111105091A - Method for determining daily peak regulation yield of underground gas storage - Google Patents
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Abstract
The invention relates to a method for determining daily peak regulation yield of an underground gas storage, which comprises the following steps: step S1, acquiring h groups of original peak shaving data, wherein h is a positive integer greater than or equal to 1; step S2, calculating the h groups of original peak-shaving data to obtain m peak-to-valley ratios, wherein m is a positive integer greater than or equal to 1; step S3, selecting any one group of the original peak shaving data to calculate to obtain the total gas production; step S4, calculating the Mandarin coefficient values of n gas production cycles of each peak-to-valley ratio by using a trial and error method; step S5, obtaining the lowest daily gas production rate corresponding to each peak-to-valley ratio according to the total gas production rate, the gas production period and the yield coefficient value; and step S6, determining daily average gas production rate of each gas production cycle according to the lowest daily gas production rate and the formation coefficient value. The invention realizes the maximization of the productivity and the optimization of the air supply capacity.
Description
Technical Field
The invention relates to the technical field of peak shaving of underground gas storage, in particular to a method for determining daily peak shaving yield of underground gas storage.
Background
The construction history of the underground gas storage in China is only 20 years, and the original gas reservoir is generally utilized to reconstruct the underground gas storage. Designers often continue a habitual design concept of 'high and stable yield' of the gas field, the peak shaving yield per day of design often adopts an average yield value, obvious deviation from the yield required by the market is caused, and the gas reservoir efficiency is reduced because the real peak gas production capacity of the gas reservoir is not exerted in practice; the design concept of the underground gas storage is completely different from the gas field development concept, and the corresponding design method is unique.
At present, the design of daily peak regulation yield of underground gas storage in China has the following three problems, which directly cause design errors.
(1) The operation mode of the gas storage does not accord with the market demand rule; the currently set operation mode of the gas storage is simple and adopts a linear type or a step type, or adopts a monthly uneven coefficient statistical method, and in practice, the gas utilization market often generates extra-high peak gas utilization and hump gas utilization in 10 days before and after spring festival according to the temperature and coldness degree in winter and the gas utilization habit. Even 1-2 humps of gas consumption appear in the gas production period due to sudden cold of weather or sudden reduction of gas sources.
(2) The daily peak regulation yield calculation unit of the gas storage is overlarge; the peak-shaving yield calculation unit of the currently set gas storage is calculated according to the average monthly basis, and actually, the peak-shaving extra-high value area of the gas storage is usually 3 to 5 days and does not exceed 10 days at most.
(3) The daily peak regulation yield calculation formula of the gas storage is deficient; the existing gas storage peak regulation yield calculation method comprises a numerical simulation method and a gas storage engineering method, but the calculation result is inaccurate due to the inaccuracy of an operation mode and a calculation unit.
Disclosure of Invention
The invention aims to provide a method for determining daily peak shaving yield of an underground gas storage with maximized productivity and optimized gas supply capacity.
In order to achieve the purpose, the invention provides the following scheme:
a method for determining daily peak shaving yield of underground gas storage comprises the following steps:
step S1, acquiring h groups of original peak shaving data, wherein h is a positive integer greater than or equal to 1;
step S2, calculating the h groups of original peak-shaving data to obtain m peak-to-valley ratios, wherein m is a positive integer greater than or equal to 1;
step S3, selecting any one group of the original peak shaving data to calculate to obtain the total gas production;
step S4, calculating the Mandarin coefficient values of n gas production cycles of each peak-to-valley ratio by using a trial and error method;
step S5, obtaining the lowest daily gas production rate corresponding to each peak-to-valley ratio according to the total gas production rate, the gas production period and the yield coefficient value;
and step S6, determining daily average gas production rate of each gas production cycle according to the lowest daily gas production rate and the formation coefficient value.
Preferably, the step of calculating the h groups of original peak shaving data to obtain m peak-to-valley ratios specifically comprises:
according to the formula
M peak-to-valley ratios are calculated;
in the formula: a is the peak-to-valley ratio, Qmax' and Qmin' is the maximum daily gas production and the minimum daily gas production in the same set of the original peak shaving data.
Preferably, the total gas production amount is obtained by the following specific formula:
in the formula: gWIs total gas production rate, n' is total gas production period number of original peak regulation data, Qi' is the average daily gas production rate, delta t, of the ith gas production cycle of the original peak shaving datai' is the ith gas production period of the original peak regulation data.
Preferably, the specific formula of the obtained lowest daily gas production corresponding to each peak-to-valley ratio is as follows:
in the formula: qminIs the lowest daily gas production, GWIs total gas production rate, n is total number of gas production cycles, delta tiFor the ith gas production cycle, MiThe value of the martensite coefficient of the ith gas production cycle.
Preferably, the determining the daily average gas production rate of each gas production cycle according to the lowest daily gas production rate and the formation coefficient value specifically includes:
according to formula Qi＝Mi*QminCalculating to obtain daily average gas production rate of each gas production period; in the formula: qminIs the lowest daily gas production, MiThe value of the martensite coefficient of the ith gas production cycle.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
firstly, h groups of original peak-shaving data are obtained, and then m peak-to-valley ratios are obtained by calculating the h groups of original peak-shaving data; selecting any one group of the original peak shaving data to calculate to obtain the total gas production; calculating by using a trial and error method to obtain the yield coefficient values of the n gas production periods of each peak-to-valley ratio; obtaining the lowest daily gas production rate corresponding to each peak-to-valley ratio according to the total gas production rate, the gas production period and the formation coefficient value; and finally, determining the daily average gas production rate of each gas production period according to the lowest daily gas production rate and the formation coefficient value. The method has the advantages of clear principle, clear process, simple and convenient calculation and accurate result; the capacity maximization and the air supply capacity optimization are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of a method for determining daily peak shaver production of an underground gas storage according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a method for determining daily peak shaving yield of an underground gas storage reservoir with maximized productivity and optimized gas supply capacity.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in FIG. 1, the invention discloses a method for determining daily peak shaving yield of underground gas storage, which comprises the following steps:
and step S1, h groups of original peak shaving data are obtained, wherein h is a positive integer greater than or equal to 1.
And step S2, calculating the h groups of original peak shaving data to obtain m peak-to-valley ratios, wherein m is a positive integer greater than or equal to 1.
And step S3, selecting any one group of the original peak shaving data to calculate to obtain the total gas production.
And step S4, calculating by using a trial and error method to obtain the value of the Mandarin coefficient of each peak-to-valley ratio in the n gas production cycles.
And step S5, obtaining the lowest daily gas production rate corresponding to each peak-to-valley ratio according to the total gas production rate, the gas production period and the yield coefficient value.
And step S6, determining daily average gas production rate of each gas production cycle according to the lowest daily gas production rate and the formation coefficient value.
As an optional implementation manner, the calculating the h sets of original peak-to-valley data to obtain m peak-to-valley ratios specifically includes:
according to the formula
M peak-to-valley ratios are calculated;
in the formula: a is the peak-to-valley ratio, Qmax' and Qmin' is the maximum daily gas production and the minimum daily gas production in the same set of the original peak shaving data.
As an alternative embodiment, the total gas production obtained according to the present invention has the following specific formula:
in the formula: gWIs total gas production rate, n' is total gas production period number of original peak regulation data, Qi' is the average daily gas production rate, delta t, of the ith gas production cycle of the original peak shaving datai' is the original peak shaving dataThe ith gas production period.
As an optional implementation manner, the specific formula of the lowest daily gas production rate corresponding to each peak-to-valley ratio obtained in the present invention is as follows:
in the formula: qminIs the lowest daily gas production, GWIs total gas production rate, n is total number of gas production cycles, delta tiFor the ith gas production cycle, MiThe value of the martensite coefficient of the ith gas production cycle.
As an optional implementation manner, the determining the daily average gas production rate of each gas production cycle according to the lowest daily gas production rate and the formation coefficient value specifically includes:
according to formula Qi＝Mi*QminCalculating to obtain daily average gas production rate of each gas production period; in the formula: qminIs the lowest daily gas production, MiThe value of the martensite coefficient of the ith gas production cycle.
The invention specifically discloses the following beneficial effects:
1) the method for determining the daily peak regulation output of the gas storage according with the market demand rule is established, and 100% coincidence of the demand rule is realized.
2) And design errors caused by the fact that other methods do not consider the operation mode are avoided. The method comprises the following steps that actual working gas quantity cannot be supported due to the fact that daily peak regulation yield is high, or the actual working gas quantity cannot be fully extracted due to the fact that daily peak regulation yield is low.
3) The method has the advantages of clear principle, clear process, simple and convenient calculation and accurate result. The adverse factors such as a numerical simulation method and the like, which need more data, influence factors, result multi-solution, complex principle and formula and difficult operation are avoided. Is the most convenient and applicable method at home at present.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. A method for determining daily peak shaving yield of underground gas storage is characterized by comprising the following steps:
step S1, acquiring h groups of original peak shaving data, wherein h is a positive integer greater than or equal to 1;
step S2, calculating the h groups of original peak-shaving data to obtain m peak-to-valley ratios, wherein m is a positive integer greater than or equal to 1;
step S3, selecting any one group of the original peak shaving data to calculate to obtain the total gas production;
step S4, calculating the Mandarin coefficient values of n gas production cycles of each peak-to-valley ratio by using a trial and error method;
step S5, obtaining the lowest daily gas production rate corresponding to each peak-to-valley ratio according to the total gas production rate, the gas production period and the yield coefficient value;
and step S6, determining daily average gas production rate of each gas production cycle according to the lowest daily gas production rate and the formation coefficient value.
2. The method for determining daily peak shaver yield of underground gas storage according to claim 1, wherein the step of calculating the h groups of original peak shaver data to obtain m peak-to-valley ratios specifically comprises:
according to the formula
M peak-to-valley ratios are calculated;
in the formula: a is the peak-to-valley ratio, Qmax' and Qmin' is the maximum daily gas production rate and the minimum daily gas production rate in the same group of the original peak shaving dataAmount of the compound (A).
3. The method for determining daily peak shaver yield of underground gas storage according to claim 1, wherein the total gas yield is obtained by the following formula:
in the formula: gWIs total gas production rate, n' is total gas production period number of original peak regulation data, Qi' is the average daily gas production rate, delta t, of the ith gas production cycle of the original peak shaving datai' is the ith gas production period of the original peak regulation data.
4. The method for determining the daily peak shaver yield of the underground gas storage according to claim 1, wherein the lowest daily gas production rate corresponding to each peak-to-valley ratio is obtained by the following formula:
in the formula: qminIs the lowest daily gas production, GWIs total gas production rate, n is total number of gas production cycles, delta tiFor the ith gas production cycle, MiThe value of the martensite coefficient of the ith gas production cycle.
5. The method for determining the daily peak shaver yield of the underground gas storage according to claim 1, wherein the daily average gas production rate of each gas production cycle is determined according to the lowest daily gas production rate and the formation coefficient value, and specifically comprises the following steps:
according to formula Qi＝Mi*QminCalculating to obtain daily average gas production rate of each gas production period; in the formula: qminIs the lowest daily gas production, MiThe value of the martensite coefficient of the ith gas production cycle.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130248483A1 (en) * | 2012-03-23 | 2013-09-26 | Hitachi High-Tech Science Corporation | Method for fabricating emitter |
| CN106522903A (en) * | 2015-09-14 | 2017-03-22 | 陈信平 | Natural gas long-period peak adjusting method |
| CN110516850A (en) * | 2019-08-02 | 2019-11-29 | 中国石油天然气股份有限公司 | Gas storage operation model optimization method based on historical learning mode |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130248483A1 (en) * | 2012-03-23 | 2013-09-26 | Hitachi High-Tech Science Corporation | Method for fabricating emitter |
| CN106522903A (en) * | 2015-09-14 | 2017-03-22 | 陈信平 | Natural gas long-period peak adjusting method |
| CN110516850A (en) * | 2019-08-02 | 2019-11-29 | 中国石油天然气股份有限公司 | Gas storage operation model optimization method based on historical learning mode |
Non-Patent Citations (1)
| Title |
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| 马小明等: ""地下储气库调峰产量与采气井数设计技术"", 《天然气工业》 * |
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Effective date of registration: 20201204 Address after: 100000 Beijing city Dongcheng District No. 16 Andrew Applicant after: PetroChina Company Limited Address before: 300280 no.1278, Xingfu Road, Dagang Oilfield, Binhai New Area, Tianjin Applicant before: DAGANG OIL FIELD OF CNPC |
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