CN108678727A - Annular protective liquid liquid replenishing method and device - Google Patents
Annular protective liquid liquid replenishing method and device Download PDFInfo
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- CN108678727A CN108678727A CN201810430897.XA CN201810430897A CN108678727A CN 108678727 A CN108678727 A CN 108678727A CN 201810430897 A CN201810430897 A CN 201810430897A CN 108678727 A CN108678727 A CN 108678727A
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- volume
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- protective liquid
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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
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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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
Abstract
A kind of annular protective liquid liquid replenishing method of present invention offer and device, wherein this approach includes the following steps：Obtain the basic data of annular space fluid infusion well；Obtain the liquid level of annular protective liquid；According to the liquid level of the basic data and the annular protective liquid of the annular space fluid infusion well, natural gas volume in oil jacket annular space is determined；According to natural gas volume in the oil jacket annular space, the volume and concentration of required filling annular protective liquid are determined；Fluid infusion operation is carried out according to the volume and concentration of required filling annular protective liquid.Due to the program by level gauging, annular space natural gas volume calculate, filling protection liquid product and concentration calculate and etc.; ensure that protection fluidity can be consistent with design objective in entire annular space after filling; improve protective effect of the annular protective liquid to tubing and casing; ensure gas well and injection-production well tubing string safety, ensures gas field and gas storage safe operation.
Description
Technical field
The present invention relates to gas recovery technical field, more particularly to a kind of annular protective liquid liquid replenishing method and device.
Background technology
With natural gas fast development, more and more complexity gas field input exploitations.It is situated between containing corrosion such as carbon dioxide
In the gas well and gas storage injection-production well of matter, downhole packer is installed mostly, insulates oil jacket annular space, casing is avoided to bear high pressure,
And annular protective liquid is filled in oil jacket annular space, avoid casing from being corroded.Field practice is found, due to tubing string or downhole tool silk
Button or ontology leak, and the liquid level of annular protective liquid can be caused to reduce, even all leakages.If the liquid level of annular protective liquid
Far below design height, it more than liquid level is inevitably full of natural gas, the corrosive mediums such as carbon dioxide in natural gas will be straight
The internal surface of sleeve pipe and oil-pipe external wall for contacting liquid level or more, will cannot get the protection of annular protective liquid, there is corrosion and lose
Imitate risk.In addition, if liquid level is too low, annular protective liquid will be unable to inside and outside active balance packer or more pressure difference and oil pipe
Pressure threatens packer and tubing safety.Reach the well of balance for annular space leakage, annulus liquid level is basicly stable, annular space fluid infusion
Annulus liquid level can be improved and be less than security risk caused by design height.Dosing method is direct filling original formulation annular space protection at present
Liquid.But due to entering natural gas in oil jacket annular space, the corrosive mediums such as carbon dioxide therein can inevitably with annular space
Ingredient in protection liquid reacts, so as to cause the reduction or failure of the performance of annular protective liquid, if filling original formulation annular space
Liquid is protected, cannot ensure that protection fluidity can be consistent with design objective in entire annular space after filling, thus cannot be well to oil jacket
The protective effect of pipe.
Invention content
An embodiment of the present invention provides a kind of annular protective liquid liquid replenishing method and device, required filling annular space is specifically calculated
The volume and concentration for protecting liquid improve ring which ensures that protecting fluidity can be consistent with design objective in entire annular space after filling
Protective effect of the sky protection liquid to tubing and casing.
The annular protective liquid liquid replenishing method includes：
Obtain the basic data of annular space fluid infusion well；
Obtain the liquid level of annular protective liquid；
According to the liquid level of the basic data and the annular protective liquid of the annular space fluid infusion well, determine in oil jacket annular space
Natural gas volume；
According to natural gas volume in the oil jacket annular space, the volume and concentration of required annular protective liquid are determined；
Fluid infusion operation is carried out according to the volume and concentration of the required annular protective liquid.
The annular protective liquid liquid supply device includes：
Basic data acquisition module, the basic data for obtaining annular space fluid infusion well；
Liquid level acquisition module, the liquid level for obtaining annular protective liquid；
Natural gas volume determining module, for according to the basic data of the annular space fluid infusion well and the annular protective liquid
Liquid level determines natural gas volume in oil jacket annular space；
The volume and concentration determination module for protecting liquid, needed for according to natural gas volume in the oil jacket annular space, determining
Annular protective liquid volume and concentration；
Fluid infusion control and operation module, for carrying out fluid infusion behaviour according to the volume and concentration of the required annular protective liquid
Make.
In embodiments of the present invention, it is obtained by the basic data of annular space fluid infusion well, the liquid level of annular protective liquid is surveyed
Amount, annular space natural gas volume calculate, filling protection liquid product and concentration calculate and etc., it is ensured that protected in entire annular space after filling
Fluidity can be consistent with design objective, improves protective effect of the annular protective liquid to tubing and casing.
Description of the drawings
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 technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of annular protective liquid liquid replenishing method flow chart provided in an embodiment of the present invention；
Fig. 2 is a kind of annular protective liquid liquid supply device structure diagram provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
In embodiments of the present invention, a kind of annular protective liquid liquid replenishing method is provided, as shown in Figure 1, this method includes：
Step 101：Obtain the basic data of annular space fluid infusion well；
Step 102：Obtain the liquid level of annular protective liquid；
Step 103：According to the liquid level of the basic data and the annular protective liquid of the annular space fluid infusion well, oil is determined
The aerial natural gas volume of lantern ring；
Step 104：According to natural gas volume in the oil jacket annular space, the volume of required annular protective liquid and dense is determined
Degree；
Step 105：Fluid infusion operation is carried out according to the volume and concentration of the required annular protective liquid.
When it is implemented, the basic data of annular space fluid infusion well is collected, including：Well data, creation data and protection liquid data.
Well data refer mainly to the pipe aperture of well, oil pipe outer diameter, sleeve outer and pipe thickness, annular space nitrogen height (works as gas storage well
Annular space fill nitrogen cushion when) and the group of oil jacket annular pressure and production fluid grade；Creation data refers mainly to a certain stabilization
Stage wellhead temperature, well head pressure, bottom hole temperature (BHT), pay zone depth, gas production and Liquid output etc.；Protection liquid data refer mainly to match
Side, includes the mass percent of each component.
When it is implemented, after having obtained above-mentioned data, the liquid level (step 102) for measuring annular protective liquid is needed.
Specifically, in well head, using liquid level test device, the liquid level of annular protective liquid is measured.Liquid level test device
Have very much, using easy, to meet required precision test device.
When it is implemented, calculating natural gas volume (step 103) in oil jacket annular space in the following way.
First, according to oil pipe outer diameter, sleeve outer and pipe thickness, it may be determined that the cross-sectional area of oil jacket annular space：
Wherein：A-annular space cross-sectional area, m2；
D-sleeve outer, m；
τ-casing pipe thickness, m；
φt- oil pipe outer diameter, m.
In conjunction with annulus liquid level height is measured, volume of the annular space top containing headroom can be obtained：
V1=Ah (2)
Wherein：V1- gassiness annular volume, m3；
A-annular space cross-sectional area, m2；
H-annulus liquid level height, m.
Then, by professional multiphase flow software for calculation (pipesim etc.), pipe aperture, wellhead temperature, well head pressure are utilized
The data such as power, bottom hole temperature (BHT), fluid components, gas production and Liquid output calculate oil jacket annular space temperature.Specifically, oil jacket annular space temperature
Can be determined according to from well head to the temperature profile of annular protective liquid liquid level, can also be according to from well head to annular protective liquid
The temperature of any point determines in level range.If it is inconvenient that measuring temperature section obtains, wellhead temperature replacement can also be used.Take well
Pressure of the mouth pressure as entire gassiness annular space.
Finally, according to the volume of oil jacket annular pressure, oil jacket annular space top containing headroom and oil jacket annular space temperature according to gas
Body state equation obtains volume of the gas in the case where marking condition in gassiness annular space.By the equation of gas state it is found that the amount gas of certain substance
Body is when from a state change to another state, the ratio of the product and temperature and volume deviation coefficient product of pressure and volume
Value remains unchanged, and corresponding the method for the present invention can obtain：
Wherein：
P1- annular pressure, MPa；
V1- gassiness annular volume, m3；
z1- volume deviation coefficient, zero dimension；
T1- annular space temperature, K；
P2- atmospheric pressure, 0.1MPa；
V2- mark condition lower volume, m3；
T2- room temperature, 273K；
z2- mark condition lower volume deviation factor, zero dimension.
In calculating process, if obtained from well head to the range of temperature of annular protective liquid liquid level at ± 10 DEG C, it can use
Temperature of the average value as entire gassiness annular space.If the temperature change that well head and annulus liquid level go out is larger, integral can be used
Mode calculates, i.e. segmentation calculates, and finally obtains volume of the gas in the case where marking condition in entire gassiness annular space.
What gassiness described above referred to only contains natural gas, then what gassiness annular volume referred to is exactly the body of annular space containing natural gas
Product, what mark condition lower volume referred to is exactly volume of the natural gas in the case where marking condition.When gas storage well fills 100-200m or so in annular space
Nitrogen cushion when, the gas in gassiness annular space just refers to including the natural gas and nitrogen for entering annular space by tubing leak.At this time
It needs to obtain volume of the nitrogen cushion in the case where marking condition using formula (3).It can thus be concluded that going out in gassiness annular space natural gas in the case where marking condition
Volume：
V=V2-VN2 (4)
Wherein：Volume of the natural gas in the case where marking condition, m in V-gassiness annular space3；
V2Volume of the gas in the case where marking condition, m in-gassiness annular space3；
VN2Volume of-nitrogen cushion the nitrogen in the case where marking condition, m3。
When it is implemented, determining the volume and concentration (step 104) of required annular protective liquid in the following way.
If being not added with nitrogen injection pad at the beginning of beginning, needs can be obtained in conjunction with the liquid level for measuring annular protective liquid
The depth of filling protection liquid；If filling nitrogen cushion at the beginning of beginning, in conjunction with the liquid level and original for measuring annular protective liquid
Design nitrogen cushion length, you can obtain the depth for needing to fill protection liquid；Then, according to the cross-sectional area of oil jacket annular space and required
The depth of annular protective liquid is filled, determines the volume of required filling annular protective liquid；According to natural gas in oil jacket annular space in mark condition
Under volume, the mass percent of the volume and each component in the annular protective liquid of required filling annular protective liquid, determine institute
The concentration of annular protective liquid need to be filled.
According to most conservative estimation, it is believed that natural gas reacts with annular protective liquid and consumes protection liquid in gassiness annular space
In active ingredient.Here it is mainly the corrosive mediums such as carbon dioxide.The volume of the corrosive mediums such as carbon dioxide can be according to ring
The volume and gas component of natural gas obtain in sky.According to the formula of annular protective liquid, the corrosion such as the volumes carbon dioxide are calculated
The consumable active ingredient of medium.Computational methods according to the corrosive mediums such as each ingredient and carbon dioxide chemical equation meter
It calculates.Formula of liquid is protected in conjunction with original, then can obtain the concentration of filling annular protective liquid：
Wherein：η-filling annular protective liquid constituent concentration, kg/m3；
m1The quality of gas consumption ingredient, kg in-annular space；
m2The quality of certain ingredient, kg in-original annular protective liquid；
V3The volume of-filling annular protective liquid, m3。
So far, according to the concentration that each ingredient is calculated, the volume filled as required reconfigures annular space protection
Liquid.
Finally, dark according to if under type is according to the volume and concentration of required annular protective liquid progress fluid infusion operation (step
105)。
Annular protective liquid is filled from oil jacket annular space using small displacement (less than the discharge capacity for just replacing annular protective liquid), until will be complete
The annular protective liquid filling of portion's design is completed.From annular space it is counter beat nitrogen to design pressure (i.e. final annular space needs reserved pressure,
Generally 5MPa or so), head valve is closed, protection liquid filling is completed.The step can be automatically performed by control device,
Can also be to be completed with by technical staff's manual operations.
Based on same inventive concept, a kind of annular protective liquid liquid supply device is additionally provided in the embodiment of the present invention, it is such as following
Embodiment described in.Since the principle that annular protective liquid liquid supply device solves the problems, such as is similar to annular protective liquid liquid replenishing method, because
The implementation of this annular protective liquid liquid supply device may refer to the implementation of annular protective liquid liquid replenishing method, and overlaps will not be repeated.
Used below, the combination of the software and/or hardware of predetermined function may be implemented in term " unit " or " module ".Although with
Device described in lower embodiment is preferably realized with software, but the realization of the combination of hardware or software and hardware
It may and be contemplated.
Fig. 2 is a kind of structure diagram of the annular protective liquid liquid supply device of the embodiment of the present invention, as shown in Fig. 2, including：
Basic data acquisition module 201, the basic data for obtaining annular space fluid infusion well；
Liquid level acquisition module 202, the liquid level for obtaining annular protective liquid；
Natural gas volume determining module 203, for being protected according to the basic data of the annular space fluid infusion well and the annular space
The liquid level of liquid determines natural gas volume in oil jacket annular space；
The volume and concentration determination module 204 for protecting liquid, for according to natural gas volume in the oil jacket annular space, determining institute
The volume and concentration of the annular protective liquid needed；
Fluid infusion control and operation module 205, for carrying out fluid infusion according to the volume and concentration of the required annular protective liquid
Operation.
The structure is illustrated below.
When it is implemented, the basic data includes well data, creation data and annular protective liquid data；
The well data include pipe aperture, oil pipe outer diameter, sleeve outer and pipe thickness, oil jacket annular pressure and life
Produce the component of fluid；
The creation data includes the wellhead temperature of stabilization sub stage, well head pressure, bottom hole temperature (BHT), pay zone depth, gas production
And Liquid output；
The annular protective liquid data include the mass percent of each component in annular protective liquid.
When it is implemented, the natural gas volume determining module 203 is specifically used for：
According to oil pipe outer diameter, sleeve outer and pipe thickness, the cross-sectional area of oil jacket annular space is determined；
According to the liquid level of the cross-sectional area of oil jacket annular space and annular protective liquid, determine that oil jacket annular space top contains headroom
Volume；
According to pipe aperture and the creation data, oil jacket annular space temperature is determined；
According to the volume of oil jacket annular pressure, oil jacket annular space top containing headroom and oil jacket annular space temperature, oil jacket ring is determined
Aerial volume of the natural gas in the case where marking condition.
When it is implemented, the volume and concentration determination module 204 of the protection liquid are specifically used for：
According to the liquid level of the annular protective liquid, the depth of required filling annular protective liquid is determined；
According to the depth of the cross-sectional area of oil jacket annular space and required filling annular protective liquid, determine that required filling annular space is protected
The volume of liquid；
According to volume, the volume of required filling annular protective liquid and the annular space of the natural gas in oil jacket annular space in the case where marking condition
The mass percent of each component in liquid is protected, determines the concentration of required filling annular protective liquid.
Further include oil jacket annular space in the well data when it is implemented, when gas storage well fills nitrogen cushion in annular space
Middle nitrogen cushion height, volume of the oil jacket annular space top containing headroom include natural gas volume and nitrogen cushion volume；
The natural gas volume determining module 203 is specifically used for：
According to the temperature of oil jacket annular pressure, oil jacket annular space the top volume containing headroom and oil jacket annular space, gassiness is determined
Gas is in the volume of volume and nitrogen cushion in the case where marking condition under marking condition in annular space；
Volume of the nitrogen cushion in the case where marking condition is subtracted in the volume under marking condition with gas in gassiness annular space, is obtained in oil jacket annular space
Volume of the natural gas in the case where marking condition；
The volume and concentration determination module 204 of the protection liquid are specifically used for：
According to the liquid level of the annular protective liquid and the nitrogen cushion height, required filling annular protective liquid is determined
Depth.
When it is implemented, the natural gas volume determining module 203 is specifically used for：Oil jacket annular space is determined according to formula (1)
Cross-sectional area；Volume of the annular space top containing headroom is determined according to formula (2).
When it is implemented, the volume and concentration determination module 204 of the protection liquid are specifically used for：It is determined according to formula (5)
The concentration of required filling annular protective liquid.
In conclusion the present invention is calculated by liquid level gauging, annular space natural gas volume, liquid concentration is protected in filling and uses gauge
It calculates, annular space fluid infusion, it is ensured that protect fluidity can be consistent with design objective in entire annular space after filling, raising annular protective liquid
Protective effect to tubing and casing, it is ensured that gas well and injection-production well tubing string safety ensure gas field and gas storage safe operation, solves existing
The problem that protection fluidity can be consistent with design objective in entire annular space after having annular space liquid replenishing method to cannot ensure filling.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer
The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made by
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of annular protective liquid liquid replenishing method, which is characterized in that including：
Obtain the basic data of annular space fluid infusion well；
Obtain the liquid level of annular protective liquid；
According to the liquid level of the basic data and the annular protective liquid of the annular space fluid infusion well, determine natural in oil jacket annular space
Air volume；
According to natural gas volume in the oil jacket annular space, the volume and concentration of required filling annular protective liquid are determined；
Fluid infusion operation is carried out according to the volume and concentration of required filling annular protective liquid.
2. annular protective liquid liquid replenishing method as described in claim 1, which is characterized in that the basic data include well data,
Creation data and annular protective liquid data；
The well data include pipe aperture, oil pipe outer diameter, sleeve outer and pipe thickness, oil jacket annular pressure and production stream
The component of body；
The creation data includes wellhead temperature, well head pressure, bottom hole temperature (BHT), pay zone depth, gas production and the production of stabilization sub stage
Liquid measure；
The annular protective liquid data include the mass percent of each component in annular protective liquid.
3. annular protective liquid liquid replenishing method as claimed in claim 2, which is characterized in that according to the basis of the annular space fluid infusion well
The liquid level of data and the annular protective liquid determines natural gas volume in oil jacket annular space, including：
According to oil pipe outer diameter, sleeve outer and pipe thickness, the cross-sectional area of oil jacket annular space is determined；
According to the liquid level of the cross-sectional area of oil jacket annular space and annular protective liquid, body of the oil jacket annular space top containing headroom is determined
Product；
According to pipe aperture and the creation data, oil jacket annular space temperature is determined；
According to the volume of oil jacket annular pressure, oil jacket annular space top containing headroom and oil jacket annular space temperature, determine in oil jacket annular space
Volume of the natural gas in the case where marking condition.
4. annular protective liquid liquid replenishing method as claimed in claim 3, which is characterized in that according to natural gas in the oil jacket annular space
Volume determines the volume and concentration of required filling annular protective liquid, including：
According to the liquid level of the annular protective liquid, the depth of required filling annular protective liquid is determined；
According to the depth of the cross-sectional area of oil jacket annular space and required filling annular protective liquid, required filling annular protective liquid is determined
Volume；
According to volume, the volume of required filling annular protective liquid and annular space protection of the natural gas in oil jacket annular space in the case where marking condition
The mass percent of each component in liquid determines the concentration of required filling annular protective liquid.
5. annular protective liquid liquid replenishing method as claimed in claim 4, which is characterized in that when gas storage well fills nitrogen in annular space
Further include nitrogen cushion height in oil jacket annular space, volume of the oil jacket annular space top containing headroom when air cushion, in the well data
Including natural gas volume and nitrogen cushion volume；
According to the volume of oil jacket annular pressure, oil jacket annular space top containing headroom and oil jacket annular space temperature, determine in oil jacket annular space
Volume of the natural gas in the case where marking condition, including：
According to the temperature of oil jacket annular pressure, oil jacket annular space the top volume containing headroom and oil jacket annular space, gassiness annular space is determined
Interior gas is in the volume of volume and nitrogen cushion in the case where marking condition under marking condition；
Volume of the nitrogen cushion in the case where marking condition is subtracted in the volume under marking condition with gas in gassiness annular space, is obtained natural in oil jacket annular space
Volume of the gas in the case where marking condition；
According to the liquid level of the annular protective liquid, the depth of required filling annular protective liquid is determined, including：
According to the liquid level of the annular protective liquid and the nitrogen cushion height, the depth of required filling annular protective liquid is determined
Degree.
6. annular protective liquid liquid replenishing method as claimed in claim 3, which is characterized in that determine oil jacket annular space according to following formula
Cross-sectional area：
Wherein, A indicates annular space cross-sectional area, m2；D indicates sleeve outer, m；τ indicates casing pipe thickness, m；φtIndicate oil pipe
Outer diameter, m；
Volume of the annular space top containing headroom is determined according to following formula：
V1=Ah；
Wherein：V1Indicate volume of the oil jacket annular space top containing headroom, m3；A indicates annular space cross-sectional area, m2；H indicates annular space liquid
Face height, m.
7. annular protective liquid liquid replenishing method as claimed in claim 4, which is characterized in that determine required filling according to following formula
The concentration of annular protective liquid：
Wherein, η indicates the concentration of any of filling annular protective liquid ingredient, kg/m3；m1Indicate gas consumption phase in annular space
Answer the quality of ingredient, kg；m2Indicate the quality of corresponding ingredient in former annular protective liquid, kg；V3Indicate the body of filling annular protective liquid
Product, m3。
8. a kind of annular protective liquid liquid supply device, which is characterized in that including：
Basic data acquisition module, the basic data for obtaining annular space fluid infusion well；
Liquid level acquisition module, the liquid level for obtaining annular protective liquid；
Natural gas volume determining module is used for the liquid level of the basic data and the annular protective liquid according to the annular space fluid infusion well
Highly, natural gas volume in oil jacket annular space is determined；
The volume and concentration determination module for protecting liquid, for according to natural gas volume in the oil jacket annular space, determining required filling
The volume and concentration of annular protective liquid；
Fluid infusion control and operation module, for carrying out fluid infusion operation according to the volume and concentration of required filling annular protective liquid.
9. annular protective liquid liquid supply device as claimed in claim 8, which is characterized in that the basic data include well data,
Creation data and annular protective liquid data；
The well data include pipe aperture, oil pipe outer diameter, sleeve outer and pipe thickness, oil jacket annular pressure and production stream
The component of body；
The creation data includes wellhead temperature, well head pressure, bottom hole temperature (BHT), pay zone depth, gas production and the production of stabilization sub stage
Liquid measure；
The annular protective liquid data include the mass percent of each component in annular protective liquid.
10. annular protective liquid liquid supply device as claimed in claim 9, which is characterized in that the natural gas volume determining module
It is specifically used for：
According to oil pipe outer diameter, sleeve outer and pipe thickness, the cross-sectional area of oil jacket annular space is determined；
According to the liquid level of the cross-sectional area of oil jacket annular space and annular protective liquid, body of the oil jacket annular space top containing headroom is determined
Product；
According to pipe aperture and the creation data, oil jacket annular space temperature is determined；
According to the volume of oil jacket annular pressure, oil jacket annular space top containing headroom and oil jacket annular space temperature, determine in oil jacket annular space
Volume of the natural gas in the case where marking condition.
11. annular protective liquid liquid supply device as claimed in claim 10, which is characterized in that the volume and concentration of the protection liquid
Determining module is specifically used for：
According to the liquid level of the annular protective liquid, the depth of required filling annular protective liquid is determined；
According to the depth of the cross-sectional area of oil jacket annular space and required filling annular protective liquid, required filling annular protective liquid is determined
Volume；
According to volume, the volume of required filling annular protective liquid and annular space protection of the natural gas in oil jacket annular space in the case where marking condition
The mass percent of each component in liquid determines the concentration of required filling annular protective liquid.
12. annular protective liquid liquid supply device as claimed in claim 11, which is characterized in that when gas storage well fills in annular space
Further include nitrogen cushion height in oil jacket annular space, body of the oil jacket annular space top containing headroom when nitrogen cushion, in the well data
Product includes natural gas volume and nitrogen cushion volume；
The natural gas volume determining module is specifically used for：
According to the temperature of oil jacket annular pressure, oil jacket annular space the top volume containing headroom and oil jacket annular space, gassiness annular space is determined
Interior gas is in the volume of volume and nitrogen cushion in the case where marking condition under marking condition；
Volume of the nitrogen cushion in the case where marking condition is subtracted in the volume under marking condition with gas in gassiness annular space, is obtained natural in oil jacket annular space
Volume of the gas in the case where marking condition；
The volume and concentration determination module of the protection liquid are specifically used for：
According to the liquid level of the annular protective liquid and the nitrogen cushion height, the depth of required filling annular protective liquid is determined
Degree.
13. annular protective liquid liquid supply device as claimed in claim 10, which is characterized in that the natural gas volume determining module
It is specifically used for：
The cross-sectional area of oil jacket annular space is determined according to following formula：
Wherein, A indicates annular space cross-sectional area, m2；D indicates sleeve outer, m；τ indicates casing pipe thickness, m；φtIndicate oil pipe
Outer diameter, m；
Volume of the annular space top containing headroom is determined according to following formula：
V1=Ah；
Wherein：V1Indicate volume of the oil jacket annular space top containing headroom, m3；A indicates annular space cross-sectional area, m2；H indicates annular space liquid
Face height, m.
14. annular protective liquid liquid supply device as claimed in claim 11, which is characterized in that the volume and concentration of the protection liquid
Determining module is specifically used for：
The concentration of required filling annular protective liquid is determined according to following formula：
Wherein, η indicates the concentration of any of filling annular protective liquid ingredient, kg/m3；m1Indicate gas consumption phase in annular space
Answer the quality of ingredient, kg；m2Indicate the quality of corresponding ingredient in former annular protective liquid, kg；V3Indicate the body of filling annular protective liquid
Product, m3。
Priority Applications (1)
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| CN113006743A (en) * | 2021-03-23 | 2021-06-22 | 西南石油大学 | Automatic coating process for gas recovery well corrosion inhibition liquid |
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