CN104614131A - Underground oil and gas storage cavern airtightness test method - Google Patents
Underground oil and gas storage cavern airtightness test method Download PDFInfo
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- CN104614131A CN104614131A CN201410811007.1A CN201410811007A CN104614131A CN 104614131 A CN104614131 A CN 104614131A CN 201410811007 A CN201410811007 A CN 201410811007A CN 104614131 A CN104614131 A CN 104614131A
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Abstract
The invention discloses an underground oil and gas storage cavern airtightness test method; the method comprises the following steps: alternately compressing tracing gas and air which are mixed by a preset proportion and pressure into the storage cavern to be tested; respectively placing a plurality of tracing gas qualitative leakage detectors at the junction portion of the manual structure inside the storage cavern and the underground rock mass, implementing detections; executing qualitative analysis to the detection result, determining the leakage point of the storage cavern; implementing seal construction again to the leakage points; using the tracing gas qualitative leakage detectors again for detections, until the whole storage cavern airtightness meets the gas storage standard. The underground oil and gas storage cavern airtightness test method has the advantages that the purpose of detecting the airtightness of the storage cavern is achieved by combining the tracing gas with the qualitative leakage detectors as well as the leakage detector qualitative analyzing technology, thereby being able to provide a basis for the possibly existed subsequent leakage point sealing construction.
Description
Technical field
This method relates to a kind of method for testing tightness, particularly relates to a kind of method of underground oil and gas bank performing leak test.
Background technology
Large Underground oil-gas depot has the features such as memory space is large, emergency capability strong, long service life because of it, has become a kind of important form of oil and gas reserve, has been known as " warehouse with height strategic security " by the whole world.The sealing propertytest of bank must be carried out before bank commencement of commercial operation, after preventing storing oil gas, because of the oil gas volatilization that poor sealing causes, cause safety and environmental accident.Due to subsurface geology complicated condition, uncertain factor is many, does not still have good detection method at present.
Traditional sealing propertytest often adopts following several method: 1. ultrasonic Detection Method 2. packer permeability test 3. is calmed the anger test.
Often there is following shortcoming in these methods:
1. hole location difficulty, irrational cloth hole is difficult to detect hidden danger position.
2. testing amount is large, and cost is high, and the cycle is long.
Summary of the invention
Object of the present invention is exactly to solve the problems of the technologies described above, provide a kind of underground oil and gas bank method for testing tightness, the performing leak test that the method adopts the form detecting tracer gas to carry out, by the detection of leak locator, the sealing situation of bank can be known, can position leakage point accurately, for corresponding construction in later period provides foundation simultaneously.
To achieve these goals, the present invention adopts following technical scheme:
A kind of underground oil and gas bank method for testing tightness, comprises the following steps:
(1) in the bank that will detect, press-in is intersected to set tracer gas and the air of ratio pressure mixing;
(2) in described bank, artificial structure and subterranean body binding site place the qualitative leak locator of some tracer gass respectively, detect;
(3) qualitative analysis is carried out to testing result, determine the leak point of bank;
(4) again seal construction is carried out to leak point, again utilize the qualitative leak locator of tracer gas to detect, until whole bank sealing reaches gas storage standard.
Tracer gas in described step (1) includes but not limited to SF
6, F
6, F
12.
The concrete grammar of described step (1) is:
First in the bank that will detect, inject the tracer gas of certain mass, in described bank, then inject the air of equal in quality, whether the gaseous tension detected in described bank reaches the air pressure standard of setting, if reached, stops gas inject; Otherwise, refill tracer gas and air according to the method described above, until the gaseous tension in described bank reaches the air pressure standard of setting.
Described to carry out qualitative analysis to testing result be alarm sound, illumination mode according to the qualitative leak locator of tracer gas, determines accurate location and the size of leak point; Concrete grammar is:
If the alarm of the qualitative leak locator of tracer gas is not reported to the police, then underground oil and gas bank sealing reaches the standard of gas storage;
If when there is poor sealing place in underground oil and gas bank, the tracer gas leaked is close to the qualitative leak locator of tracer gas, alarm sends alerting signal, and speed and the frequency of alarm sound strengthen with the increase of amount of leakage, and luminotron also changes illumination mode according to the change of concentration;
Utilize the qualitative leak locator of tracer gas to position leak point, determine that the point that trace gas concentration is the highest is leak point.
Beneficial effect of the present invention:
The inventive method adopts tracer gas to combine and leak locator Technique of Qualitative Analysis with qualitative leak locator, and to reach the object detecting bank sealing, the shutoff leak point construction that simultaneously may be able to exist for the later stage provides foundation.
Tracer gas selected by this method has that cost of manufacture is low, stable chemical nature, to features such as environmental impact are little.Qualitative leak locator has simple to operate, is easy to carry, highly sensitive, the features such as good stability.
Utilize this method can between detection period the leak case of Real-time Collection artificial structure and subterranean body binding site gas, by the detection analysis of leak locator, can know whether bank exists gas leakage, can position, for corresponding construction in later period provides foundation the size of leakage point, position accurately simultaneously.Because this method can select the kind of tracer gas and qualitative leak locator according to the concrete condition at scene, therefore can use under different testing conditions.
Accompanying drawing explanation
Fig. 1 is this method schematic diagram;
Fig. 2 is that certain underground oil-gas depot detects position simulation drawing.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
As shown in Figure 1, a kind of method of underground oil and gas bank performing leak test is divided into following three steps:
1. after tracer gas gas storage cylinder being connected to pneumatic pump, being pressed into the bank that will detect, and then utilizing pneumatic pump pressing part air, two kinds of gases intersect successively and are pressed into.According to the chemical property of selected tracer gas, determine the number of use amount, thus determine pressure.The effect of press-in air is diluted tracer gas, makes tracer gas can be full of bank uniformly, when bank internal gas pressure standard-required, stops inflation.
Concrete grammar is the tracer gas that first injects certain mass in the bank that will detect, then in described bank, inject the air of equal in quality, the sensor gaseous tension detected in described bank is used whether to reach the air pressure standard of setting, generally get 2 atmospheric pressure, if reached, stop gas inject; Otherwise, again intersect according to the method described above and inject tracer gas and air, until the gaseous tension in described bank reaches the air pressure standard of setting.
2. respectively the qualitative leak locator of these tracer gass several is positioned over artificial structure and subterranean body binding site, for certain underground oil-gas depot, it detects position and focuses mostly in positions such as construction tunnel, technique vertical shaft, ventilating shafts.Note keeping the clean and dry of instrument surface.Qualitative leakage detecting instrument test is qualitative analysis, and operating personnel only need open switch, and this detector will be programmed, and can search for corresponding gas at once.
If 3. alarm is not reported to the police, illustrate that bank sealing is good, reach the standard of gas storage.When bank exists poor sealing place, the tracer gas of leakage is close to leak locator, and alarm just sends alerting signal, and speed and the frequency of alarm sound strengthen with the increase of amount of leakage, and the change according to concentration is also changed illumination mode by luminotron.Utilize leak locator to position leak point, concentration highest point is gas leakage point, needs with the higher position of qualitative leak locator determination concentration.Again to carrying out seal construction herein, and then utilizing leak locator to detect, until alarm is not reported to the police, illustrating that whole bank sealing is good, reaching gas storage standard.
Concentration near leak point is higher, and from leak point, comparatively distant positions concentration can reduce.For the qualitative leak locator of XP-1A, it defines 18 warning levels, can clearly indicate relative leak sizes and intensity, the warning level instruction increased is close to source of leaks (maximum concentration), level is indicated by LED each time, one in green, orange, the red trichromatism of LED display, start display screen from left to right green light, then with the increase revealing gas concentration, LED can from left to right send out light orange, replaces green glow successively, finally at every turn, LED can from left to right glow, and replaces orange light successively at every turn.
Tracer gas should have following principal character: 1. stable chemical nature, does not react, do not have radioactivity with oil gas.2. do not burn in atmosphere, not combustion-supporting, sterling is nontoxic.3. in air, content is low, and environmental pollution is little.According to concrete field condition, select corresponding tracer gas.Such as SF
6, F
6, F
12deng, they are harmless to human non-toxic, do not have radioactivity, are the inert gases that in air, content is low, have not burn, not combustion-supporting character.
The choice criteria of bank internal pressure after tracer gas dosage, concentration and gas storage, can determine according to the chemical property of the capacity of underground storage, instrument detection sensitivity and selected gas.
The intersection plunging adopted during test, this kind of method is that the air-flow utilizing pneumatic pump to produce makes tracer gas evenly can be full of bank under its effect, avoids some position in bank to occur the situation that trace gas concentration is excessive or too small.
Test detects position and mainly concentrates on artificial structure and subterranean body binding site, the positions such as such as construction tunnel, technique vertical shaft, ventilating shaft.Detect duration and should make corresponding adjustment according to the change of bank internal pressure.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (4)
1. a underground oil and gas bank method for testing tightness, is characterized in that, comprises the following steps:
(1) in the bank that will detect, press-in is intersected to set tracer gas and the air of ratio pressure mixing;
(2) in described bank, artificial structure and subterranean body binding site place the qualitative leak locator of some tracer gass respectively, detect;
(3) qualitative analysis is carried out to testing result, determine the leak point of bank;
(4) again seal construction is carried out to leak point, again utilize the qualitative leak locator of tracer gas to detect, until whole bank sealing reaches gas storage standard.
2. a kind of underground oil and gas bank method for testing tightness as claimed in claim 1, it is characterized in that, the tracer gas in described step (1) includes but not limited to SF
6, F
6, F
12.
3. a kind of underground oil and gas bank method for testing tightness as claimed in claim 1, it is characterized in that, the concrete grammar of described step (1) is:
First in the bank that will detect, inject the tracer gas of certain mass, in described bank, then inject the air of equal in quality, whether the gaseous tension detected in described bank reaches the air pressure standard of setting, if reached, stops gas inject; Otherwise, refill tracer gas and air according to the method described above, until the gaseous tension in described bank reaches the air pressure standard of setting.
4. a kind of underground oil and gas bank method for testing tightness as claimed in claim 1, it is characterized in that, described to carry out qualitative analysis to testing result be alarm sound, illumination mode according to the qualitative leak locator of tracer gas, determines accurate location and the size of leak point; Concrete grammar is:
If the alarm of the qualitative leak locator of tracer gas is not reported to the police, then underground oil and gas bank sealing reaches the standard of gas storage;
If when there is poor sealing place in underground oil and gas bank, the tracer gas leaked is close to the qualitative leak locator of tracer gas, alarm sends alerting signal, and speed and the frequency of alarm sound strengthen with the increase of amount of leakage, and luminotron also changes illumination mode according to the change of concentration;
Utilize the qualitative leak locator of tracer gas to position leak point, determine that the point that trace gas concentration is the highest is leak point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410811007.1A CN104614131A (en) | 2014-12-22 | 2014-12-22 | Underground oil and gas storage cavern airtightness test method |
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| CN201410811007.1A CN104614131A (en) | 2014-12-22 | 2014-12-22 | Underground oil and gas storage cavern airtightness test method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389275A (en) * | 2017-08-04 | 2017-11-24 | 大唐东北电力试验研究所有限公司 | Heat exchangers for district heating leakage detection system and method |
| CN108507734A (en) * | 2017-02-28 | 2018-09-07 | 中国石油天然气股份有限公司 | The detection method of salt cave leakproofness |
| CN108533968A (en) * | 2018-05-09 | 2018-09-14 | 北京市燃气集团有限责任公司 | Steel gas pipe underground leak point positioning method based on search gas |
| CN109521164A (en) * | 2018-12-28 | 2019-03-26 | 上海勘察设计研究院(集团)有限公司 | Thick wall body crosscutting concern detection system and method |
| CN109991142A (en) * | 2017-12-30 | 2019-07-09 | 中国人民解放军63653部队 | Earth-boring airtightness in-situ detection method |
| CN110455464A (en) * | 2019-08-22 | 2019-11-15 | 贵州师范大学 | A kind of method of efficient detection container intracavity leakage |
| CN110987307A (en) * | 2019-11-11 | 2020-04-10 | 首钢环境产业有限公司 | Method for detecting airtightness of garbage storage |
| CN113135381A (en) * | 2020-01-18 | 2021-07-20 | 天津大港油田圣达科技有限公司 | Technology for determining gas storage tightness by tracer |
| CN113551849A (en) * | 2021-06-23 | 2021-10-26 | 国网福建省电力有限公司南平供电公司 | Photoacoustic analysis device for preventing small animal from blocking wall by adopting trace gas to jet cable duct |
| CN115656011A (en) * | 2022-12-27 | 2023-01-31 | 中国电建集团西北勘测设计研究院有限公司 | Underground gas storage cavern rock mass airtightness in-situ test system and test method |
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| CN202080134U (en) * | 2011-01-26 | 2011-12-21 | 长城汽车股份有限公司 | Automobile instrument with oil tank cover sealing and monitoring function |
| CN103091053A (en) * | 2011-11-07 | 2013-05-08 | 中国广东核电集团有限公司 | Nuclear power plant generator whole air tight test method |
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| JPS60222741A (en) * | 1984-04-20 | 1985-11-07 | Kawasaki Heavy Ind Ltd | Gas leak detector of low temperature double-shell tank |
| EP1764601A1 (en) * | 2005-09-15 | 2007-03-21 | Air Products and Chemicals, Inc. | Gas sensor array system and method of detecting gas leaks at a connecting joint |
| CN202080134U (en) * | 2011-01-26 | 2011-12-21 | 长城汽车股份有限公司 | Automobile instrument with oil tank cover sealing and monitoring function |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507734A (en) * | 2017-02-28 | 2018-09-07 | 中国石油天然气股份有限公司 | The detection method of salt cave leakproofness |
| CN108507734B (en) * | 2017-02-28 | 2020-01-03 | 中国石油天然气股份有限公司 | Method for detecting sealing performance of salt cavern |
| CN107389275A (en) * | 2017-08-04 | 2017-11-24 | 大唐东北电力试验研究所有限公司 | Heat exchangers for district heating leakage detection system and method |
| CN109991142A (en) * | 2017-12-30 | 2019-07-09 | 中国人民解放军63653部队 | Earth-boring airtightness in-situ detection method |
| CN108533968A (en) * | 2018-05-09 | 2018-09-14 | 北京市燃气集团有限责任公司 | Steel gas pipe underground leak point positioning method based on search gas |
| CN109521164A (en) * | 2018-12-28 | 2019-03-26 | 上海勘察设计研究院(集团)有限公司 | Thick wall body crosscutting concern detection system and method |
| CN110455464A (en) * | 2019-08-22 | 2019-11-15 | 贵州师范大学 | A kind of method of efficient detection container intracavity leakage |
| CN110987307A (en) * | 2019-11-11 | 2020-04-10 | 首钢环境产业有限公司 | Method for detecting airtightness of garbage storage |
| CN113135381A (en) * | 2020-01-18 | 2021-07-20 | 天津大港油田圣达科技有限公司 | Technology for determining gas storage tightness by tracer |
| CN113551849A (en) * | 2021-06-23 | 2021-10-26 | 国网福建省电力有限公司南平供电公司 | Photoacoustic analysis device for preventing small animal from blocking wall by adopting trace gas to jet cable duct |
| CN113551849B (en) * | 2021-06-23 | 2024-01-19 | 国网福建省电力有限公司南平供电公司 | Photoacoustic analysis device for small animal blocking wall prevention by adopting tracer gas jet cable trench |
| CN115656011A (en) * | 2022-12-27 | 2023-01-31 | 中国电建集团西北勘测设计研究院有限公司 | Underground gas storage cavern rock mass airtightness in-situ test system and test method |
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Application publication date: 20150513 |