CN105484733B - Gas-liquid interface depth test method and device - Google Patents
Gas-liquid interface depth test method and device Download PDFInfo
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- CN105484733B CN105484733B CN201510923352.9A CN201510923352A CN105484733B CN 105484733 B CN105484733 B CN 105484733B CN 201510923352 A CN201510923352 A CN 201510923352A CN 105484733 B CN105484733 B CN 105484733B
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- gas
- oil well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
- E21B47/047—Liquid level
Abstract
The embodiment of the present application discloses a kind of gas-liquid interface depth test method and device.The described method includes: obtaining the structural parameters of oil well annular space；The pressure of first gas is obtained, the first gas is the gas of the oil well annular space to be implanted；The pressure of second gas is obtained, the second gas is the gas before injecting first gas in the oil well annular space, and the pressure of the first gas is greater than the pressure of the second gas；The first gas of preset vol is injected into the oil well annular space；The pressure of third gas is obtained, the third gas is first gas and the mixed gas of second gas in the oil well annular space after injecting the first gas of preset vol；According to the structural parameters of the oil well annular space, the pressure of the first gas, the pressure of the second gas, the pressure of the preset vol and the third gas, the depth of gas-liquid interface in the oil well annular space is obtained.
Description
Technical field
This application involves oil exploration technology field, in particular to a kind of gas-liquid interface depth test method and device.
Background technique
Generally, space oil well middle sleeve and instlated tubular or casing and oil pipe formed is as the annular space of oil well.
During oil exploitation, need to test the interface depth of gas and liquid in oil well annular space, to the oil
The operational parameter and mining method of well are adjusted.Currently, mainly using echo method to the gas-liquid interface in oil well annular space
Depth is tested.Its detailed process is general are as follows: in the well head explosive and microphone of oil well.Utilize the sounding of explosive charge
As sound source, the time of explosive charge is recorded.The sound wave issued by the sound source is downward along annular space since the well head of oil well
It propagates, generates back wave after encountering the liquid-gas interface in annular space.The back wave is along annular space to the well head side of oil well
To propagation.The back wave for propagating to well head is received using microphone, and records the time for receiving back wave for the first time.Pass through calculating
Explosive charge and microphone receive the time difference of back wave, determine the depth of gas-liquid interface in annular space.
During realizing the application, at least there are the following problems in the prior art for inventor's discovery:
During being tested using echo method the gas-liquid interface depth in oil well annular space, test site is usual
With more noise jamming, but the sensitivity of microphone is not usually high, can not accurately tell the back wave for propagating to well head,
The back wave time inaccuracy received for the first time for causing record, so that the finally accuracy of determining gas-liquid interface depth
It is not high.In addition, the explosion of explosive has risk, above-mentioned echo method is usually unable to satisfy the needs of safe operation.
Summary of the invention
The purpose of the embodiment of the present application is to provide a kind of gas-liquid interface depth test method and device, is meeting safe operation
Property while, improve gas-liquid interface depth test result accuracy.
In order to solve the above technical problems, it is this that the embodiment of the present application, which provides a kind of gas-liquid interface depth test method and device,
What sample was realized:
A kind of gas-liquid interface depth test method, comprising:
Obtain the structural parameters of oil well annular space；
The pressure of first gas is obtained, the first gas is the gas of the oil well annular space to be implanted；
The pressure of second gas is obtained, the second gas is the gas before injecting first gas in the oil well annular space
Body, the pressure of the first gas are greater than the pressure of the second gas；
The first gas of preset vol is injected into the oil well annular space；
The pressure of third gas is obtained, the third gas is the oil well ring after injecting the first gas of preset vol
First gas and the mixed gas of second gas in shape space；
According to the structural parameters of the oil well annular space, the pressure of the first gas, the pressure of the second gas,
The pressure of the preset vol and the third gas obtains the depth of gas-liquid interface in the oil well annular space.
A kind of gas-liquid interface depth test and device, comprising:
First obtains module, for obtaining the structural parameters of oil well annular space；
Second obtains module, and for obtaining the pressure of first gas, the first gas is the oil well annular to be implanted
The gas in space；
Third obtains module, and for obtaining the pressure of second gas, the second gas is described before injecting first gas
Gas in oil well annular space, the pressure of the first gas are greater than the pressure of the second gas；
Injection module, for injecting the first gas of preset vol into the oil well annular space；
4th obtains module, and for obtaining the pressure of third gas, the third gas is inject preset vol first
After gas, first gas and the mixed gas of second gas in the oil well annular space；
5th obtains module, for according to the structural parameters of the oil well annular space, the pressure of the first gas, institute
The pressure of second gas, the pressure of the preset vol and the third gas are stated, gas-liquid in the oil well annular space is obtained
The depth at interface.
As can be seen from the technical scheme provided by the above embodiments of the present application, the embodiment of the present application can be according to oil well annular space
Structural parameters, first gas pressure, the pressure of second gas, the pressure of preset vol and third gas, obtain the oil
The depth of gas-liquid interface in well annular space.Compared with prior art, the method for the embodiment of the present application does not need quick-fried using explosive
It is fried to issue sound wave, and do not need to receive the back wave for propagating to well head using microphone, so as to meet safe operation
Property while, improve gas-liquid interface depth test result accuracy.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, 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 only this
The some embodiments recorded in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart of the embodiment of the present application gas-liquid interface depth test method；
Fig. 2 is the schematic diagram of the embodiment of the present application gas-liquid interface depth test method；
Fig. 3 is the functional block diagram of the embodiment of the present application gas-liquid interface depth test device.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without creative efforts
Range.
Generally, after the completion of oil gas well drilling, cave-in blocks well head in order to prevent, can consolidate to oil/gas well
Well.The process of well cementation be usually casing is lowered into the wellhole of oil/gas well, then between casing and the borehole wall joints cement with
Fixation is sealed to the space between casing and the borehole wall.The finally tripping in oil pipe in casing.In this way, can be by oil well inner sleeve
Annular space of the space formed with oil pipe as oil well.
But it is heat-insulated in order to realize for the oil/gas well of heavy crude producing, usually can also in casing tripping in instlated tubular, and
Filled media in the annular space that instlated tubular and casing are formed, such as water or air etc., to reduce the loss of heat.Instlated tubular is logical
Often it is made of inner and outer tubes.Be heat insulation layer between the inner and outer tubes of instlated tubular, inside can be vacuum, or can be with
Filled with heat-insulating material.In this way, the space that oil well inner sleeve and instlated tubular can be formed is as the annular space of oil well.
Generally, the top of oil well annular space is gas, and lower part is liquid.The liquid can be oil or oil mixing with water
Object.Gas and liquid in annular space can form an interface.The gas-liquid interface depth test method of the embodiment of the present application,
The depth of gas-liquid interface in oil well annular space can be tested.As shown in Figure 1, this method comprises:
S101: the structural parameters of oil well annular space are obtained.
In some embodiments, the space that instlated tubular in oil well and casing can be formed is empty as the annular of oil well
Between.So, the structural parameters of the oil well annular space may include the diameter of heat-insulated pipe outer wall and the diameter of internal surface of sleeve pipe.
In other embodiments, the space that oil pipe in oil well and casing can be formed is empty as the annular of oil well
Between.So, the structural parameters of the oil well annular space may include the diameter of oil-pipe external wall and the diameter of internal surface of sleeve pipe.
S102: obtaining the pressure of first gas, and the first gas is the gas of the oil well annular space to be implanted.
The first gas can be located in the device of storage gas, such as can be the gases such as nitrogen.The storage gas
The device of body can be nitrogen cylinder etc..
S103: obtaining the pressure of second gas, and the second gas is the oil well annular space before injection first gas
Interior gas, the pressure of the first gas are greater than the pressure of the second gas.
The pressure that device for pressure measurement obtains gas in oil well annular space before injection first gas can be used.Wherein,
The pressure of the first gas is greater than the pressure of the second gas.In this way, in subsequent step S104, it can be to oil well ring
First gas is injected in shape space.
The first gas of injection preset vol in S104: Xiang Suoshu oil well annular space.
Specifically, the device that storage gas can be used injects first gas into oil well annular space.In injection first
During gas, the volume of first gas in flowmeter metering injection annular space can be used.When in injection annular space
After the volume of first gas is equal to preset vol, it can stop injecting first gas.
It should be noted that the preset vol is under the pressure state of the first gas, injection oil well annular is empty
The volume of interior first gas.
S105: obtaining the pressure of third gas, and the third gas is the oil after injecting the first gas of preset vol
First gas and the mixed gas of second gas in well annular space.
The pressure of first gas is greater than the pressure of second gas.Therefore, first gas is being injected into oil well annular space
During, the pressure of gas can increase in annular space.After the first gas of injection preset vol, pressure survey can be used
Measure the pressure of third gas in device measure annular space.
S106: according to the structural parameters of the oil well annular space, the pressure of the first gas, the second gas
The pressure of pressure, the preset vol and the third gas obtains the depth of gas-liquid interface in the oil well annular space.
It can be according to the pressure of the first gas, the pressure of the second gas, the preset vol and the third
The pressure of gas obtains the volume of third gas in oil well annular space.Then according to the volume of the third gas, Yi Jisuo
The structural parameters for stating oil well annular space obtain the depth of gas-liquid interface in the oil well annular space.
Specifically, the gas on annular space top can be considered as perfect gas.In this way, it is based on the equation of gas state, and
It, can according to the pressure of the first gas, the pressure of the second gas, the pressure of the preset vol and the third gas
To obtain the volume of third gas in oil well annular space by following formula (1).
In formula (1),
V1For the volume of third gas in oil well annular space；
P1For the pressure of second gas；
P2For the pressure of third gas；
V is that the first gas of preset vol in pressure is P1Volume under state.
It is possible to further obtain V value by following formula (2).
In formula (2),
P0For the pressure of first gas；
V0For preset vol.
It, can be by following according to the volume of the third gas and the structural parameters of the oil well annular space
Formula (3) obtains the depth of gas-liquid interface in the oil well annular space.
In formula (3),
H is the depth of gas-liquid interface in oil well annular space, and unit is rice (m)；
φ1For the diameter of internal surface of sleeve pipe, unit is millimeter (mm)；
φ2For the diameter of heat-insulated pipe outer wall or the diameter of oil-pipe external wall, unit is millimeter (mm).
Specifically, for above-mentioned formula (3), when the sky that the annular space of oil well is instlated tubular and casing composition in oil well
Between when, φ2It can be the diameter of instlated tubular outer wall.When the space that the annular space of oil well is oil pipe and casing composition in oil well
When, φ2It can be the diameter of oil-pipe external wall.
Fig. 2 shows the schematic diagrams of the gas-liquid interface depth test method of the embodiment of the present application.Wherein, 1 is nitrogen cylinder, 2
It is the inner wall of casing for flowmeter, 3,4 be instlated tubular or the outer wall of oil pipe, and 5 be annular space, and 6 be the gas-liquid in annular space
Interface.
The gas-liquid interface depth test method of the embodiment of the present application, can be according to the structural parameters of oil well annular space,
Pressure, the pressure of second gas, the pressure of preset vol and third gas of one gas, obtain gas in the oil well annular space
The depth at liquid interface.Compared with prior art, the method for the embodiment of the present application does not need to issue sound wave using explosive charge, and
It does not need to receive the back wave for propagating to well head using microphone, so as to improve gas while meeting operational safety
The accuracy of liquid interface depth test result.
Further, the method for the embodiment of the present application is a kind of method of indirectly testing gas-liquid interface depth, is tested every time
When only need to inject a small amount of gas into oil well annular space, the depth of gas-liquid interface in producing well annular space can be calculated, pass through
Practical and application of helping is convenient, so as to reduce the construction cost of test gas-liquid interface depth.
The embodiment of the present application also provides a kind of gas-liquid interface depth test device, as shown in Figure 3, comprising:
First obtains module 301, for obtaining the structural parameters of oil well annular space；
Second obtains module 302, and for obtaining the pressure of first gas, the first gas is the oil well ring to be implanted
The gas in shape space；
Third obtains module 303, and for obtaining the pressure of second gas, the second gas is institute before injection first gas
The gas in oil well annular space is stated, the pressure of the first gas is greater than the pressure of the second gas；
Injection module 304, for injecting the first gas of preset vol into the oil well annular space；
4th obtains module 305, and for obtaining the pressure of third gas, the third gas be the of injection preset vol
After one gas, first gas and the mixed gas of second gas in the oil well annular space；
5th obtains module 306, for the pressure according to the structural parameters of the oil well annular space, the first gas
Power, the pressure of the second gas, the pressure of the preset vol and the third gas, obtain in the oil well annular space
The depth of gas-liquid interface.
System, device, module or the unit that above-described embodiment illustrates can specifically realize by computer chip or entity,
Or it is realized by the product with certain function.
For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each unit can be realized in the same or multiple software and or hardware when application.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.
The application can be used in numerous general or special purpose computing system environments or configuration.Such as: personal computer, clothes
Business device computer, handheld device or portable device, laptop device, multicomputer system, microprocessor-based system, set
Top box, programmable consumer-elcetronics devices, network PC, minicomputer, mainframe computer including any of the above system or equipment
Distributed computing environment etc..
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application's
Spirit.
Claims (4)
1. a kind of gas-liquid interface depth test method characterized by comprising
The structural parameters of oil well annular space are obtained, the oil well annular space is the space of instlated tubular and casing composition in oil well
Or the space of oil pipe and casing composition；
The pressure of first gas is obtained, the first gas is the gas of the oil well annular space to be implanted, first gas
Body is nitrogen；
The pressure of second gas is obtained, the second gas is the gas before injecting first gas in the oil well annular space,
The pressure of the first gas is greater than the pressure of the second gas；
The first gas of preset vol is injected into the oil well annular space；
The pressure of third gas is obtained, the third gas is after injecting the first gas of preset vol, and the oil well annular is empty
Interior first gas and the mixed gas of second gas；
According to the pressure of the first gas, the pressure of the second gas, the pressure of the preset vol and the third gas
Power passes through formulaObtain the volume of third gas in oil well annular space；Wherein, V1For in oil well annular space
The volume of third gas, P1For the pressure of second gas, P2For the pressure of third gas, V is that the first gas of preset vol is being pressed
Power is P1Volume under state,P0For the pressure of first gas, V0For preset vol；
According to the volume of the third gas and the structural parameters of the oil well annular space, it is empty to obtain the oil well annular
The depth of interior gas-liquid interface；Specifically, obtaining the depth of gas-liquid interface in the oil well annular space by following formula:
Wherein,
H is the depth of gas-liquid interface in oil well annular space, and unit is rice；
φ1For the diameter of internal surface of sleeve pipe, unit is millimeter；
φ2For the diameter of heat-insulated pipe outer wall or the diameter of oil-pipe external wall, unit is millimeter.
2. the method as described in claim 1, which is characterized in that the structural parameters of the oil well annular space include in oil well every
The diameter of heat pipe outer wall and the diameter of internal surface of sleeve pipe.
3. the method as described in claim 1, which is characterized in that the structural parameters of the oil well annular space include oily well oil
The diameter of pipe outer wall and the diameter of internal surface of sleeve pipe.
4. a kind of gas-liquid interface depth test device characterized by comprising
First obtains module, and for obtaining the structural parameters of oil well annular space, the oil well annular space is heat-insulated in oil well
The space or oil pipe of pipe and casing composition and the space of casing composition；
Second obtains module, and for obtaining the pressure of first gas, the first gas is the oil well annular space to be implanted
Gas, the first gas be nitrogen；
Third obtains module, and for obtaining the pressure of second gas, the second gas is the oil well before injection first gas
Gas in annular space, the pressure of the first gas are greater than the pressure of the second gas；
Injection module, for injecting the first gas of preset vol into the oil well annular space；
4th obtains module, and for obtaining the pressure of third gas, the third gas is to inject the first gas of preset vol
Afterwards, first gas and the mixed gas of second gas in the oil well annular space；
5th obtain module, for according to the pressure of the first gas, the pressure of the second gas, the preset vol and
The pressure of the third gas, passes through formulaObtain the volume of third gas in oil well annular space；Wherein, V1
For the volume of third gas in oil well annular space, P1For the pressure of second gas, P2For the pressure of third gas, V is default body
Long-pending first gas is P in pressure1Volume under state,P0For the pressure of first gas, V0For preset vol；Root
According to the volume of the third gas and the structural parameters of the oil well annular space, gas in the oil well annular space is obtained
The depth at liquid interface；Specifically, obtaining the depth of gas-liquid interface in the oil well annular space by following formula:
Wherein,
H is the depth of gas-liquid interface in oil well annular space, and unit is rice；
φ1For the diameter of internal surface of sleeve pipe, unit is millimeter；
φ2For the diameter of heat-insulated pipe outer wall or the diameter of oil-pipe external wall, unit is millimeter.
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Families Citing this family (2)
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| CN109209347A (en) * | 2018-10-10 | 2019-01-15 | 中国石油天然气股份有限公司 | Oil well annular space gas-liquid interface measuring method and device |
| CN113738346A (en) * | 2020-05-27 | 2021-12-03 | 中国石油天然气股份有限公司 | Method and device for acquiring working fluid level depth of heavy oil well |
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| CN2296931Y (en) * | 1997-04-29 | 1998-11-11 | 刘军 | Air pressure meter for water level of borehole |
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