CN109505588A - Failure detection method for water injection valve of gravity flow water injection well - Google Patents
Failure detection method for water injection valve of gravity flow water injection well Download PDFInfo
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- CN109505588A CN109505588A CN201710831984.1A CN201710831984A CN109505588A CN 109505588 A CN109505588 A CN 109505588A CN 201710831984 A CN201710831984 A CN 201710831984A CN 109505588 A CN109505588 A CN 109505588A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 169
- 238000002347 injection Methods 0.000 title claims abstract description 129
- 239000007924 injection Substances 0.000 title claims abstract description 129
- 238000001514 detection method Methods 0.000 title abstract description 5
- 230000005484 gravity Effects 0.000 title abstract description 4
- 239000012530 fluid Substances 0.000 claims abstract description 73
- 239000002349 well water Substances 0.000 claims abstract description 14
- 235000020681 well water Nutrition 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 35
- 238000005259 measurement Methods 0.000 claims description 20
- 230000002950 deficient Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 23
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009469 supplementation Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Measuring Volume Flow (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a failure detection method for a water injection valve of a gravity flow water injection well. The invention provides a failure detection method of a self-flowing water injection well water injection valve, which comprises the following steps: closing a water injection valve of the self-flowing water injection well, and measuring a first temperature gradient value of fluid in the well bore within a set depth range from the water injection valve, wherein the temperature gradient value represents a ratio between a temperature change and a depth change of the fluid; and if the first temperature gradient value exceeds the normal temperature gradient range of the fluid in the shaft, determining that the water injection valve is invalid. The invention provides a failure detection method for a water injection valve of a self-flowing water injection well, which realizes the purpose of conveniently and quickly judging whether the water injection valve fails or not.
Description
Technical field
The present invention relates to oil extraction in oil field field of engineering technology more particularly to a kind of failure detections of dumpflood well water injection valve
Method.
Background technique
Flood suction refers to that being injected into another from one of water-bearing layer Cai Shui of oil well requires supplementation with strata pressure
In oil reservoir, to keep a kind of technology of reservoir pressure.Flood suction technology be particularly suitable for flooding pattern is not perfect, edge oil reservoir with
And the oilfield exploitation in the scarcity of fresh water resources area such as desert, sea.Flood suction technical operation is simple, is not necessarily to ground installation, well
Lower tubular column is simple and water filling is very fast, is a kind of cost-effective oil reservoir energy supplement mode, as one kind of conventional waterflooding
Alternative is widely used.
In order to control waterflood timing and injection flow of the water from water-bearing layer injection oil reservoirs, setting water injection valve (106) is carried out
Control.As shown in Figure 1, when needed, opening water injection valve (106), in condition properly and in the higher situation of aqueous stressor layer, greatly
The water of amount injects oil reservoirs from water-bearing layer, and by grease Gravity Separation, bottom water improves crude output to pop-up oil.Pass through water filling
It when reservoir pressure being made to make it, needs to close water injection valve (106), stops water filling.During oil extraction, it is also desirable to
It closes water injection valve (106).
In use, water injection valve (106) may be caused to fail due to various reasons, however the prior art can not judge
Whether water injection valve fails, and can only solve the problems, such as this by way of periodic replacement.If replacement is excessively frequent, certainly will will increase dramatically
Unnecessary cost；If replacement is not in time, may be failed due to water injection valve (106) causes to leak, so that the crude oil of exploitation contains
Water rate is higher, increases later period separation costs.Therefore, a kind of easily and efficiently method is needed to judge whether water injection valve (106) loses
Effect.
Summary of the invention
The present invention provides a kind of abatement detecting method of dumpflood well water injection valve, to solve not judging in the prior art
The problem of whether water injection valve fails.
The present invention provides a kind of abatement detecting method of dumpflood well water injection valve, comprising:
The water injection valve of dumpflood well is closed, is measured away from the first temperature of fluid in pit shaft within the scope of water injection valve set depth
Gradient value, wherein temperature gradient value indicates the ratio between fluid temperature variations and change in depth；
If the first temperature gradient value exceeds the normal temperature gradients range of the downhole well fluid, it is determined that water filling defective valve.
Optionally, if the first temperature gradient value is within the scope of normal temperature gradients, it is determined that water injection valve is effective.
Further, the above method further include:
The water injection valve of dumpflood well is opened, is measured away from the fluid second temperature in pit shaft within the scope of water injection valve set depth
Gradient value, wherein temperature gradient value indicates the ratio between fluid temperature variations and change in depth；
If second temperature gradient value is within the scope of normal temperature gradients, it is determined that water filling defective valve.
Optionally, if second temperature gradient value exceeds normal temperature gradients range, it is determined that water injection valve is effective.
Further, in some alternative embodiments, it measures away from the pit shaft within the scope of set depth above water injection valve
Interior fluid the first temperature gradient value；Alternatively,
Measurement is away from the first temperature gradient of fluid within the scope of set depth above water injection valve and within the scope of the set depth of lower section
Value.
Optionally, the first temperature gradient value includes the temperature gradient value of multiple equidistant depth within the scope of set depth.
Further, in some alternative embodiments, it measures away from the pit shaft within the scope of set depth above water injection valve
Interior fluid second temperature gradient value；Alternatively,
Measurement is away from the fluid second temperature gradient within the scope of set depth above water injection valve and within the scope of the set depth of lower section
Value.
Optionally, second temperature gradient value includes the temperature gradient value of multiple equidistant depth within the scope of set depth.
The present invention provides a kind of abatement detecting method of dumpflood well water injection valve, by measuring away from water injection valve set depth
The temperature gradient value of fluid in range in pit shaft, and the normal temperature gradients range of itself and the downhole well fluid is compared
Compared with can be convenient and efficiently judge whether dumpflood well water injection valve fails.It realizes and judges whether water injection valve fails,
And the method for the invention is easy to operate, at low cost, and accuracy is high.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the diagrammatic cross-section of dumpflood well；
Fig. 2 is the flow chart of one embodiment of abatement detecting method of dumpflood well water injection valve of the present invention；
Fig. 3 is the flow chart of another embodiment of abatement detecting method of dumpflood well water injection valve of the present invention.
Description of symbols:
101: steel wire；
102: oil pipe；
103: surface pipe；
104: protective casing；
105: test device；
106: water injection valve；
107: perforation；
108: packer；
109: reservoir.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Hereinafter, the part term in the present invention is explained, in order to those skilled in the art understand that.
1) flood suction refers to that being injected into another from the wherein at least one water-bearing layer Cai Shui of oil well requires supplementation with stratum
In the oil reservoir of pressure, to keep a kind of technology of reservoir pressure.In order to control waterflood timing and water injection rate, need to pass through water injection valve
Come the open and close filled the water.
2) temperature gradient is that temperature in nature, water temperature or the soil moisture change with land height or waters and depth of soil
And the step increments that occur or the phenomenon that successively decrease.Temperature gradient in the application refers to the temperature change value and depth of downhole well fluid
The ratio between changing value is spent, the unit of the temperature gradient value in the application is DEG C/100 meters.For example, being surveyed at 3000 meters of well depth
The fluid temperature (F.T.) measured is 76 DEG C, and it is 82 DEG C that obtained fluid temperature (F.T.) is measured 3300 meters of well depth at, then at 3300 meters of well depth
Temperature gradient be denoted as 2 DEG C/100 meters.
3) " multiple " refer to two or more.
4) " first " and " second " in the application only plays mark action, is not understood to indicate or imply sequence and closes
System, relative importance or the quantity for implicitly indicating indicated technical characteristic.
5) " one embodiment " or " embodiment " that specification is mentioned in the whole text means related with embodiment specific
Feature, structure or characteristic include at least one embodiment of the application.Therefore, the whole instruction occur everywhere "
In one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific features, structure
Or characteristic can combine in any suitable manner in one or more embodiments.
The embodiment of the present invention is described with reference to the accompanying drawings of the specification.
Fig. 1 is the diagrammatic cross-section of dumpflood well.As shown in Figure 1, crude oil passes through oil pipe during oil extraction
(102) it is transmitted on ground, with the progress of exploitation, the reservoir pressure in reservoir (109) can be gradually decreased, and will lead to oil field
Yield decline.At this time, it may be necessary to be pressurized by being filled the water to reservoir (109) to oil reservoir, since the density of oil is less than the close of water
Degree, therefore oil reservoir is located above water layer, by grease Gravity Separation, the water positioned at lower layer is to pop-up oil, to improve crude output.
It is suitable for carrying out water filling using flood suction technology for oil in some water resources shortage areas.
Oil well will usually drill at least one water-bearing layer and an oil reservoirs, and flood suction is by wherein at least one water-bearing layer
Water be injected into another and require supplementation in the oil reservoir of strata pressure.As shown in Figure 1, surface pipe (103) is located at protective casing
(104) outside is arranged perforation (107) at the corresponding water layer of protective casing (104), the water in the water-bearing layer is introduced into packer
(108) at the position above, when needing to be pressurized reservoir (109), water injection valve (106) is opened and are filled the water；It is pre- when being pressurized to
If when target, pressure, closing water injection valve (106), stop water filling.It should be noted that the position of perforation (107) and quantity in Fig. 1
Only play signal, specific location and quantity is not limited.The position according to water-bearing layer, aqueous is needed in actual production
Layer water content and specific production environment comprehensively consider, determine specifically where be arranged perforation (107), determine specifically from
Several water-bearing layers carry out adopting water etc..
When realizing the application specific embodiment, a survey can be fixed using one end in steel wire (101) as shown in Figure 1
Trial assembly is set (105) and is measured, to obtain related data；Or it is obtained in some temperature sensors of inner wall setting of oil pipe (102)
Take related data.
Fig. 2 is the flow chart of one embodiment of abatement detecting method of dumpflood well water injection valve of the present invention.As shown in Fig. 2,
The method of the present embodiment may include:
Step 201: closing the water injection valve of dumpflood well, measure away from the fluid in pit shaft within the scope of water injection valve set depth
First temperature gradient value, wherein temperature gradient value indicates the ratio between fluid temperature variations and change in depth.
When water injection valve works normally, after water filling, after closing the water injection valve of dumpflood well, the temperature of downhole well fluid
Value gradually rises with the increase of depth；Fluid temperature gradient value slowly declines with the increase of depth.If filling the water defective valve,
It can be leaked after closing, the water of leakage enters in pit shaft the temperature value that will affect fluid near water injection valve.It will lead to water injection valve
Neighbouring fluid temperature values reduce, and then fluid temperature gradient value is caused to mutate.Therefore, in the case where water injection valve is closed,
It can judge whether water injection valve fails by the fluid temperature gradient value near observation water injection valve.
Water injection valve for dumpflood well is check valve, i.e., only allows the liquid outside pit shaft to flow into pit shaft, without permitting
Perhaps the liquid outflow in pit shaft.The opening and closing of water injection valve can be controlled by sliding sleeve.
It can be using the first temperature gradient value of various ways measurement downhole well fluid.Such as: it can be in wirerope one end
A storing electronic thermometer is fixed, water injection valve is transferred to and nearby carries out one-point measurement；Alternatively, one can be arranged in tube inner wall
A little temperature sensors, obtain temperature value in real time.
In the case where water injection valve is closed, measurement is away from fluid the first temperature ladder in pit shaft within the scope of water injection valve set depth
Angle value.Specifically, measurement sets deep away within the scope of set depth above the water injection valve and lower section in a kind of achievable mode
Spend fluid the first temperature gradient value in range.Set depth range can specifically be set according to specific production environment,
It should not be too large, because exceeding a certain range, with the progress of heat exchange, even if leakage occurs for water injection valve to the shadow of temperature gradient value
Sound can also weaken.
Fluid the first temperature gradient value in 100 meters away from water injection valve depth bounds can be measured.Between being taken when measurement etc.
It is a little measured away from taking, then the first temperature gradient value includes the temperature gradient value of multiple equidistant depth within the scope of set depth.
For example, can fathom fluid temperature (F.T.) within the scope of 5450 meters to 5550 meters, between setting if depth locating for water injection valve is 5500 meters
Away from being 3 meters, then measured at depth " ... 5491,5494,5497,5500,5503,5506,5509 ... ".
In process of production, if water injection valve leaks, the water of leakage can flow away upwards with crude oil, influence water injection valve
The temperature gradient value of top.At this point it is possible to measure the first temperature of fluid in the pit shaft above water injection valve within the scope of set depth
Gradient value.
Step 202: if the first temperature gradient value exceeds the normal temperature gradients range of the downhole well fluid, it is determined that water filling
Defective valve.
Although temperature can change with the variation of season, weather etc., temperature gradient value can be more stable.?
In the present embodiment, the temperature in pit shaft in 0 to 7000 meters of depth bounds can be measured, calculate in 0 to 7000 meters of depth it is each not
With the temperature gradient value of depth.For example, can be after installation water injection valve for the first time, it is ensured that when water injection valve is effective, obtain each depth
Temperature gradient value at degree, in this, as normal temperature gradients range.Why temperature 0 to 7000 meters depth gamut in is measured
Degree, rather than intercept a certain depth bounds and measure, is on the one hand to be comprehensively considered, reject it is some due to instrument or
Error value caused by human factor keeps the normal temperature gradients range obtained accurate and reliable；It on the other hand is 0 to arrive in order to obtain
The temperature gradient value of each depth in 7000 meters of depth, to have at respective depth when water injection valve is in different depth
Normal temperature gradients range is for comparing.
In the case where water injection valve is closed, if water injection valve leaks, the water of leakage will affect the temperature of downhole well fluid
Gradient value.Therefore, in the case where water injection valve is closed, if normal temperature ladder of the first temperature gradient value beyond the downhole well fluid
Range is spent, then can determine water filling defective valve；Conversely, if the first temperature gradient value within the scope of the normal temperature gradients, can
Determine that water injection valve is effective.
Table 1 is that a Gas Company in process of production measures downhole well fluid temperature, pressure and density, acquisition
The table of related data.At this point, water injection valve is in close state, water injection valve is located at about 5600 meters of well depth.To be convenient for
It is bright, the value in 0 to 5780 meters of depth bounds is contained in table 1.As shown in table 1, with the increase of depth, fluid temperature values are gradually
It increases, fluid temperature gradient value slowly declines.However, as shown in thickened portion numerical value in table 1, about in 5583 meters to 5610 meters depths
Place, fluid temperature gradient value are abnormal, and have exceeded the normal temperature gradients range of the downhole well fluid.It is possible thereby to determine,
Defective valve is filled the water, is leaked, the temperature within the scope of the water injection valve of the water currents in pit shaft or more certain depth is leaked into
Gradient value.
It as shown in table 1, can be quasi- in time by fluid temperature gradient value abnormal within the scope of certain depth above and below water injection valve
Really determine water filling defective valve.Relevant information is provided for production process in time, to take corresponding technical measures to solve the problems, such as.
Table 1
The present embodiment passes through in the case that measurement water injection valve is closed away from the fluid in pit shaft within the scope of water injection valve set depth
Temperature gradient value, and it is compared with the normal temperature gradients range of the downhole well fluid, it is efficiently right to can be convenient
Whether dumpflood well water injection valve, which occurs leakage loss, is judged.The present embodiment the method is easy to operate, at low cost, accurately
Degree is high.It is asked it is possible to prevente effectively from oil-producing moisture content is excessively high caused by being leaked in process of production due to water filling defective valve generation
Topic.
Fig. 3 is the flow chart of another embodiment of abatement detecting method of dumpflood well water injection valve of the present invention.Such as Fig. 3 institute
Show, the method for the present embodiment can also include: on the basis of the above embodiments
Step 301: opening the water injection valve of dumpflood well, measure away from the fluid in pit shaft within the scope of water injection valve set depth
Second temperature gradient value, wherein temperature gradient value indicates the ratio between fluid temperature variations and change in depth.
When needing to carry out reservoir water filling increase, the water injection valve for needing to open dumpflood well is filled the water.Work as water filling
When valve is effective, a large amount of water is had via in water injection valve injection pit shaft.Will lead to water injection valve, nearby fluid temperature values reduce, in turn
Fluid temperature gradient value is caused to mutate.It therefore, can be by observing near water injection valve in the case where water injection valve is opened
Whether fluid temperature gradient value mutates determine whether water injection valve is effective.
In the case where water injection valve is opened, measurement is away from the fluid second temperature ladder in pit shaft within the scope of water injection valve set depth
Angle value.Specifically, measurement is away from the fluid first within the scope of set depth above the water injection valve and within the scope of the set depth of lower section
Temperature gradient value, alternatively, measurement is away from the fluid second temperature gradient value in the pit shaft within the scope of set depth below water injection valve.If
Determining depth bounds can specifically be set according to specific production environment.
Fluid second temperature gradient value in 100 meters away from water injection valve depth bounds can be measured.Between being taken when measurement etc.
It is a little measured away from taking, then second temperature gradient value includes the temperature gradient value of multiple equidistant depth within the scope of set depth.
Step 302: if second temperature gradient value is within the scope of normal temperature gradients, it is determined that water filling defective valve.
Normal temperature gradients value range can be obtained according to the method for above-described embodiment.It is filled the water opening water injection valve
When, the water of injection will affect the temperature gradient value of downhole well fluid.Therefore, in the case where water injection valve is opened, if second temperature
Gradient value then can determine water filling defective valve, water filling failure within the scope of normal temperature gradients；Conversely, if second temperature gradient value
Beyond normal temperature gradients range, then it can determine that water injection valve is effective, fills the water successfully.
Table 2 be a Gas Company open water injection valve carry out flood suction during to downhole well fluid temperature, pressure and
Density measures, the table of the related data of acquisition.At this point, water injection valve is in the open state, water injection valve is located at well depth about
At 5600 meters.For ease of explanation, the value in 0 to 5780 meters of depth bounds is contained in table 1.As shown in table 1, with depth
Increase, fluid temperature values gradually rise, and fluid temperature gradient value slowly declines.However, such as thickened portion numerical value institute in table 1
Show, about 5601 meters to 5610 meters depths, fluid temperature gradient value is abnormal, and has exceeded the normal temperature of the downhole well fluid
Gradient scope.It is possible thereby to determine, water injection valve is effective, fills the water successfully, injects next on the water injection valve of the water currents in pit shaft
Determine the temperature gradient value in depth bounds.
Table 2
The present embodiment passes through in the case that measurement water injection valve is opened away from the fluid in pit shaft within the scope of water injection valve set depth
Temperature gradient value, and it is compared with the normal temperature gradients range of the downhole well fluid, it is efficiently right to can be convenient
Whether dumpflood well water injection valve, which is opened, is successfully judged.The present embodiment the method is easy to operate, at low cost, accuracy
It is high.It is possible to prevente effectively from the problem of opening water filling failure caused by failure due to water injection valve in process of production.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of abatement detecting method of dumpflood well water injection valve characterized by comprising
The water injection valve of dumpflood well is closed, is measured away from the first temperature of fluid in pit shaft within the scope of the water injection valve set depth
Gradient value, wherein temperature gradient value indicates the ratio between fluid temperature variations and change in depth；
If the first temperature gradient value exceeds the normal temperature gradients range of the downhole well fluid, it is determined that the water injection valve loses
Effect.
2. the method according to claim 1, wherein the method also includes:
If the first temperature gradient value is within the scope of the normal temperature gradients, it is determined that the water injection valve is effective.
3. the method according to claim 1, wherein the method also includes:
The water injection valve of dumpflood well is opened, is measured away from the fluid second temperature in pit shaft within the scope of the water injection valve set depth
Gradient value, wherein temperature gradient value indicates the ratio between fluid temperature variations and change in depth；
If the second temperature gradient value is within the scope of the normal temperature gradients, it is determined that the water filling defective valve.
4. according to the method described in claim 3, it is characterized in that, the method also includes:
If the second temperature gradient value exceeds the normal temperature gradients range, it is determined that the water injection valve is effective.
5. method according to claim 1 or 2, which is characterized in that the measurement is away from the water injection valve set depth range
Fluid the first temperature gradient value in interior pit shaft, comprising:
Measurement is away from fluid the first temperature gradient value in the pit shaft within the scope of set depth above the water injection valve；Alternatively,
Measurement is away from the first temperature gradient of fluid within the scope of set depth above the water injection valve and within the scope of the set depth of lower section
Value.
6. according to the method described in claim 5, it is characterized in that, the first temperature gradient value includes the set depth model
Enclose the temperature gradient value of interior multiple equidistant depth.
7. the method according to claim 3 or 4, which is characterized in that the measurement is away from the water injection valve set depth range
Fluid second temperature gradient value in interior pit shaft, comprising:
Measurement is away from the fluid second temperature gradient value in the pit shaft within the scope of set depth below the water injection valve；Alternatively,
Measurement is away from the fluid second temperature gradient within the scope of set depth above the water injection valve and within the scope of the set depth of lower section
Value.
8. the method according to the description of claim 7 is characterized in that the second temperature gradient value includes the set depth model
Enclose the temperature gradient value of interior multiple equidistant depth.
9. the method according to claim 1, wherein the normal temperature gradients range of the downhole well fluid is
Temperature gradient in pit shaft in 0 to 7000 meters of depth bounds.
10. the method according to claim 1, wherein the measurement is away within the scope of the water injection valve set depth
Fluid the first temperature gradient value in pit shaft, comprising:
Measure fluid the first temperature gradient value in 100 meters away from water injection valve depth bounds.
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| CN201710831984.1A CN109505588B (en) | 2017-09-15 | 2017-09-15 | Failure detection method for water injection valve of gravity flow water injection well |
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| CN201710831984.1A CN109505588B (en) | 2017-09-15 | 2017-09-15 | Failure detection method for water injection valve of gravity flow water injection well |
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