CN109506850A - A kind of salt well method for testing tightness - Google Patents
A kind of salt well method for testing tightness Download PDFInfo
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- CN109506850A CN109506850A CN201811375731.9A CN201811375731A CN109506850A CN 109506850 A CN109506850 A CN 109506850A CN 201811375731 A CN201811375731 A CN 201811375731A CN 109506850 A CN109506850 A CN 109506850A
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- test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to old, discarded salt well reutilization technology fields, disclose a kind of salt well method for testing tightness, comprising: step 1, well group gangs up test；Step 2, well group leak-off-test；Step 3, well group voltage-withstand test.The beneficial effect comprise that 1, successive process gangs up test, leak-off-test and voltage-withstand test, test method is reasonable；2, test data sampling is more, and sampled point science, test evaluation is according to effectively；3, test process pay attention to salt cave thermal balance, avoid rock salt corrosion and avoid salt well plastic deformation etc., test result is accurate.The beneficial effect comprise that 1, successive process gangs up test, leak-off-test and voltage-withstand test, test method is reasonable；2, test data sampling is more, and sampled point science, test evaluation is according to effectively；3, test process pay attention to salt cave thermal balance, avoid rock salt corrosion and avoid salt well plastic deformation etc., test result is accurate.
Description
Technical field
The present invention relates to old, discarded salt well reutilization technology fields, more particularly, to a kind of salt well performing leak test side
Method.
Background technique
Extracted by way of well-digging subsurface brine (naturally occur or salt mine water filling after generate), manufactured salt is just well
Salt, the vertical shaft for producing well salt are just salt well or halogen mining well.Main source one of of the well salt as salt raw material, is widely deployed and answers
With.But the ability that a bite salt well produces salt is limited, and long-term bittern exploitation can leave largely discarded salt well.Discarded salt well can not only be made
It is wasted at land resource, also suffers from into the limitation of well, technique of shunting in a well, subsurface brine and natural gas, sulfur dioxide, hydrogen sulfide etc.
Pernicious gas is easily gone here and there along discarded pit shaft, is even overflowed earth's surface into superficial part water-bearing layer, is caused sky gas and water, soil pollution.It will give up
Abandon salt well be transformed into the recyclings mode such as gas storage, can not only pollution remission, economize the land resource, moreover it is possible to reduce recycle when before
The cost of phase.But currently without properly effectively to the method for old being sealed property of the chamber test of salt well formation, estimation of stability.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, a kind of salt well method for testing tightness is proposed, solve existing
The technical issues of lacking in technology to the test of being sealed property of salt well, estimation of stability.
To reach above-mentioned technical purpose, technical solution of the present invention provides a kind of salt well method for testing tightness, including such as
Lower step:
Step 1, well group gangs up test, stops test well group and the adjacent well group to adopt and empty to no brine and return out, to test
Well group water filling, if adjacent well group has brine to return out, the test well group is to alter to lead to or alter a layer well group；If adjacent well group Halogen water
It returns out, then the test well group is independent well group；
Step 2, well group leak-off-test, the test well group that Xiang Shangshu regards as independent well group continue to fill the water, record note
Water flow a and row halogen flow b, and compare injection flow a and arrange ratio of the halogen flow b difference relative to injection flow a, that is, it misses
AmountIf θ≤10%, the test well group is intact well group；If θ > 10%, the testing well
Group is leakage well group；If θ > 30%, the test well group is severe leakage well group；
Step 3, well group voltage-withstand test includes the following steps:
Step 3.1, by the above-mentioned several days of test well group halt production for regarding as intact well group, make salt cave thermal balance.
Step 3.2, to test well group multipass injection brine boosting, brine injection rate and period are during which recorded
Pressure value variation；
Step 3.3, it draws wastage and changes over time curve graph, if leakage is smaller and smaller, and be lower than setting value, then institute
The leakproofness for stating test well group is good；If wastage is always held at θ > 10%, illustrate the leakproofness of the test well group
Difference.
The present invention also provides a kind of test equipment of any of the above-described the method, including both ends pass through respectively threeway with it is described
The pressure testing manifold of the production flow line connection of well group is tested, the pump truck on the pressure testing manifold is set to the production flow line
With several gate valves at each node of pressure testing manifold, for detecting the ultrasonic flowmeter of brine parameter, temperature in the production flow line
Degree meter and densitometer, and the pressure gauge for detecting the test well group internal pressure force value.
Compared with prior art, the beneficial effect comprise that 1, successive process gangs up test, leak-off-test and pressure resistance
Test, test method are reasonable；2, test data sampling is more, and sampled point science, test evaluation is according to effectively；3, test process pays attention to
Salt cave thermal balance, avoid rock salt corrosion and avoid salt well plastic deformation etc., test result is accurate.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Fig. 2 is that test well group internal pressure power changes over time curve；
Fig. 3 is the leakage of test well group and sealing correlation curve；
Fig. 4 is the structural schematic diagram of test equipment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention provides a kind of salt well method for testing tightness, as shown in Figure 1, including the following steps:
Step 1, well group gangs up test, stops test well group and the adjacent well group to adopt and empty to no brine and return out, to test
Well group water filling, if adjacent well group has brine to return out, the test well group is to alter to lead to or alter a layer well group；If adjacent well group Halogen water
It returns out, then the test well group is independent well group.
Step 2, well group leak-off-test, the test well group that Xiang Shangshu regards as independent well group continue to fill the water, record note
Water flow a and row halogen flow b, and compare injection flow a and arrange ratio of the halogen flow b difference relative to injection flow a, that is, it misses
AmountIf θ≤10%, the test well group is intact well group；If θ > 10%, the testing well
Group is leakage well group；If θ > 30%, the test well group is severe leakage well group；Concretely:
Step 2.1, site inspection confirms that the water filling of well group to be measured and row's halogen process are unimpeded；
Step 2.2, two ultrasonic flowmeters are demarcated and is recorded；
Step 2.3, respectively in test well group inlet and outlet installation ultrasonic flowmeter, the recording flowmeter truth of a matter；
Step 2.4, water filling records the instantaneous flow value of 1 inlet and outlet flowmeter per hour and adds up after stable conditions
Flow value, the inlet and outlet difference in flow holding of integrated flow value terminate test after stablizing 8 hours.
Step 3, well group voltage-withstand test.After old chamber water filling boosting, the principal element for influencing pressure change has: thermal diffusion, rock
Salt creep, rock salt corrosion, the compressibility of cavity, the permeability of rock salt.In order to improve measuring accuracy, well group voltage-withstand test includes such as
Lower step:
Step 3.1, by the above-mentioned several days of test well group halt production for regarding as intact well group, the off-time is preferably
10 days, make salt cave thermal balance；
Step 3.2, to test well group multipass injection brine boosting repeatedly boosting, transient creep (plasticity is avoided
Deformation) and rock salt boosting after permeation effects, during which record brine injection rate and the pressure value of period and change, as shown in Fig. 2, empty
Line is the pressure curve for having leakage phenomena, and solid line is the pressure curve without leakage phenomena, what the direct ratio straightway in solid line indicated
Brine boosting is injected, what the glide in realization indicated is that pressure caused by cavity transient creep, infiltration, brine compressibility becomes
Change；
Step 3.3, it draws wastage and changes over time curve graph, as shown in figure 3, if leakage is smaller and smaller, and be lower than
Setting value, then the leakproofness of the test well group is good；If wastage is always held at setting value or more (i.e. θ > 10%),
Illustrate that the leakproofness of the test well group is poor.
Preferably, using saturated bittern or high concentration halogen when boosting to the test well group in the step 3.2
Water avoids rock salt corrosion.
Preferably, in the step 3.2, after boosting to test pressure value for the first time to the test well group, waiting 2~
3 days, and record brine injection rate and the variation of the pressure value of period；Each boosting later, for interval, was during which recorded with 24 hours
Brine injection rate and pressure value variation.Wastage is calculated, number of repetition is The more the better, is generally at least repeated 10 times, and enrolls 10
Wastage.
Preferably, each boost process gradually boosts stage by stage in the step 3.2.
The present invention also provides a kind of test equipments of any of the above-described the method, as shown in figure 4, including that both ends pass through respectively
The pressure testing manifold 2 that threeway 6 is connected to the production flow line 1 of the test well group, the pump truck 3 on the pressure testing manifold 2, setting
Several gate valves 4 at the production flow line 1 and each node of pressure testing manifold 2, for detecting brine parameter in the production flow line 1
Ultrasonic flowmeter, thermometer and densitometer, and for detect it is described test well group internal pressure force value pressure gauge 5.Ultrasonic wave
The preferable high-accuracy portable of flowmeter, it is mounted on the pipeline of water injection well and row's halogen well, comparative reading is poor after stablizing.
Preferably, the junction of the pressure testing manifold 2 and the production flow line 1 is equipped with flange 7 and gate valve 4.
The above described specific embodiments of the present invention are not intended to limit the scope of the present invention..Any basis
Any other various changes and modifications that technical concept of the invention is made should be included in the guarantor of the claims in the present invention
It protects in range.
Claims (7)
1. a kind of salt well method for testing tightness, includes the following steps:
Step 1, well group gangs up test, stops test well group and the adjacent well group to adopt and empty to no brine and return out, to test well group
Water filling, if adjacent well group has brine to return out, the test well group is to alter to lead to or alter a layer well group；If adjacent well group Halogen water returns
Out, then the test well group is independent well group；
Step 2, well group leak-off-test, the test well group that Xiang Shangshu regards as independent well group continue to fill the water, and record water injection manifold
A and row halogen flow b are measured, and compares injection flow a and arranges ratio of the halogen flow b difference relative to injection flow a, i.e. wastageIf θ≤10%, the test well group is intact well group；If θ > 10%, the test well group
To miss well group；If θ > 30%, the test well group is severe leakage well group；
Step 3, well group voltage-withstand test includes the following steps:
Step 3.1, by the above-mentioned several days of test well group halt production for regarding as intact well group, make salt cave thermal balance；
Step 3.2, to test well group multipass injection brine boosting, the pressure of brine injection rate and period is during which recorded
Value variation；
Step 3.3, it draws wastage and changes over time curve graph, if leakage is smaller and smaller, and be lower than setting value, the then survey
The leakproofness of well testing group is good；If wastage is always held at θ > 10%, illustrate that the leakproofness of the test well group is poor.
2. a kind of salt well method for testing tightness according to claim 1, it is characterised in that: in the step 3.1, stop production
Time is 10 days.
3. a kind of salt well method for testing tightness according to claim 1, it is characterised in that: in the step 3.2, to institute
Using saturated bittern or High Concentration Brine when stating test well group boosting.
4. a kind of salt well method for testing tightness according to claim 1, it is characterised in that: in the step 3.2, to institute
It states after test well group boosts to test pressure value for the first time, waits 2~3 days, and record brine injection rate and the pressure value of period and become
Change；Each boosting later, for interval, during which recorded brine injection rate and pressure value variation with 24 hours.
5. a kind of salt well method for testing tightness according to claim 1, it is characterised in that: in the step 3.2, every time
Boost process gradually boosts stage by stage.
6. a kind of test equipment using any the method for Claims 1 to 55, it is characterised in that: pass through respectively including both ends
The pressure testing manifold that threeway is connected to the production flow line of the test well group, the pump truck on the pressure testing manifold, is set to institute
Several gate valves at production flow line and each node of pressure testing manifold are stated, for detecting the ultrasonic wave of brine parameter in the production flow line
Flowmeter, thermometer and densitometer, and the pressure gauge for detecting the test well group internal pressure force value.
7. a kind of test equipment according to claim 6, it is characterised in that: the pressure testing manifold and the production flow line
Junction is equipped with flange and gate valve.
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| CN201811375731.9A CN109506850A (en) | 2018-11-19 | 2018-11-19 | A kind of salt well method for testing tightness |
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| CN201811375731.9A CN109506850A (en) | 2018-11-19 | 2018-11-19 | A kind of salt well method for testing tightness |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117917291A (en) * | 2023-12-08 | 2024-04-23 | 江苏苏盐井神股份有限公司 | Method for disposing oil-based drilling waste by using abandoned salt cavern |
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| CN103902827A (en) * | 2014-04-03 | 2014-07-02 | 刘鑫 | Flow unit division method of carbonate-rock horizontal wells |
| CN104481541A (en) * | 2014-11-27 | 2015-04-01 | 中盐勘察设计院有限公司 | One-inclined multi-vertical cascaded well group salt mine mining method |
| CN205027324U (en) * | 2015-09-24 | 2016-02-10 | 中国石油天然气股份有限公司 | Measuring tool for communicating shape and volume of salt cavern cavity |
| CN108507734A (en) * | 2017-02-28 | 2018-09-07 | 中国石油天然气股份有限公司 | Method for detecting sealing performance of salt cavern |
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2018
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| GB1435855A (en) * | 1973-08-28 | 1976-05-19 | Bayer Ag | Process for consolidating radioactive waste solutions |
| CN102798507A (en) * | 2012-07-06 | 2012-11-28 | 中国石油大学(华东) | Testing device and testing method for tightness of underground salt cavern gas storage |
| CN103902827A (en) * | 2014-04-03 | 2014-07-02 | 刘鑫 | Flow unit division method of carbonate-rock horizontal wells |
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| CN205027324U (en) * | 2015-09-24 | 2016-02-10 | 中国石油天然气股份有限公司 | Measuring tool for communicating shape and volume of salt cavern cavity |
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| CN117917291A (en) * | 2023-12-08 | 2024-04-23 | 江苏苏盐井神股份有限公司 | Method for disposing oil-based drilling waste by using abandoned salt cavern |
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