CN109209347A - Oil well annular space gas-liquid interface measuring method and device - Google Patents
Oil well annular space gas-liquid interface measuring method and device Download PDFInfo
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- CN109209347A CN109209347A CN201811177629.8A CN201811177629A CN109209347A CN 109209347 A CN109209347 A CN 109209347A CN 201811177629 A CN201811177629 A CN 201811177629A CN 109209347 A CN109209347 A CN 109209347A
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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 present invention provides a kind of oil well annular space gas-liquid interface measuring methods and device, the method to include: injecting nitrogen into oil well annular space, and monitors gas pressure change data in the oil well annular space；Acquisition annular volume data are calculated by the equation of gas state according to the gas pressure change data and the volume for injecting nitrogen；The position height for obtaining gas-liquid interface in oil well annular space is calculated according to the tubing string parameter of oil well and the annular volume data.The present invention have the characteristics that construction is simple, quickly, not by annular space medium interference and suitable annular space hp-ht well monitor.
Description
Technical field
The present invention relates to technical field of petroleum extraction, especially a kind of oil well of the measurement of adaptation hp-ht well gas-liquid interface
The measuring method and device of annular space gas-liquid interface.
Background technique
Oil jacket annulus liquid level monitoring method main method includes echo method, floating drum method, pressure gauge method of testing and shows function at present
Figure method etc..Echo method principle is in well head using medicine bullet explosion sounding or high pressure gas cylinder as sound source, and the vibration wave of generation is along oil
Annular space in pipe, casing is propagated downwards, is encountered liquid level and is generated back wave, is received back wave using well head microphone and is calculated
The depth of liquid level.Floating drum method is limited using floating drum detection liquid level technique by floating drum weight and float volume, generally can only be
Oil sets annular space does not have the use of the operation well of the annular of pressure and unlimited well head.Pressure gauge detects oil well liquid level method
It is essentially identical with pressure testing method, gas-liquid interface is determined by barometric gradient mutation value, but it is complicated, test period length to there is construction
Disadvantage.And indicator diagram method utilizes law of connected vessels, this method is easy to operate, at low cost, but that there are later data processing difficulties is big,
Error is larger.Using the method for air injection there are security risk, need selectively to use for specific oil well conditions.
There is numerous thick oil thermal extractions at present, this general annular space of well is all high temperature and pressure, and temperature is at 200 DEG C or more, ring
Pneumatics power is up to 10MPa or so, and conventional liquid level monitoring method is from operational safety, difficulty of construction, construction cost, measuring accuracy side
Face is all difficult to reach requirement.It is therefore desirable to propose the stronger oil well annular space gas-liquid interface method of adaptability.
Summary of the invention
It is an object of that present invention to provide a kind of method and devices for measuring oil well annular space gas-liquid interface, in order to which simplification is applied
Work, while being suitble to annular space hp-ht well, the measurement and monitoring of oil well annular space gas-liquid interface are not completed by annular space medium interference.
In order to achieve the above object, oil well annular space gas-liquid interface measuring method provided by the present invention, specifically includes: to oil well ring
Nitrogen is injected in empty, and monitors gas pressure change data in the oil well annular space；According to the gas pressure change data and
The volume for injecting nitrogen is calculated by the equation of gas state obtains annular volume data；According to the tubing string parameter of oil well and the ring
Hollow body volume data calculates the position height for obtaining gas-liquid interface in oil well annular space.
In above-mentioned oil well annular space gas-liquid interface measuring method, it is preferred that inject nitrogen into oil well annular space, and monitor institute
Stating gas pressure change data in oil well annular space includes: injecting nitrogen into the oil well by nitrogen cylinder and passes through electron pressure
Meter monitors gas pressure change data in the oil well annular space.
In above-mentioned oil well annular space gas-liquid interface measuring method, it is preferred that the volume of the injection nitrogen passes through following public affairs
Formula, which calculates, to be obtained: P0×V0=P1×V；P0×V0=n0R0T0；P1× V=n0R0T0；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0For
Nitrogen pressure；V0To inject nitrogen volume flow；n0For the molal quantity of the gas of injection nitrogen；R0Enter gas for air compressor machine
Case constant；V1For the aerial volume of nitrogen injection front ring；T0Enter the absolute temperature of gas for air compressor machine；V is the body for injecting nitrogen
Product.
In above-mentioned oil well annular space gas-liquid interface measuring method, it is preferred that the volume of the injection nitrogen passes through following public affairs
Formula, which calculates, to be obtained:
P1×(V1+ V)=P2×V1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1For
The aerial volume of nitrogen injection front ring；V is the volume for injecting nitrogen.
In above-mentioned oil well annular space gas-liquid interface measuring method, it is preferred that the pressure of the aerial gas of nitrogen injection front ring
With the pressure of gas is calculated by the following formula acquisition in annular space after the nitrogen injection:
P1×(V1+ V)=n1R1T1；P2×V1=n1R1T1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1For
The aerial volume of nitrogen injection front ring；n1For the molal quantity of gas total in annular space after injection；R1For the case constant of gas in annular space；
T1For the absolute temperature of gas in annular space.
In above-mentioned oil well annular space gas-liquid interface measuring method, it is preferred that the tubing string parameter according to oil well and described
The position height that annular volume data calculate gas-liquid interface in acquisition oil well annular space includes: being calculated by the following formula acquisition oil well
The position height of gas-liquid interface in annular space:
In above formula, h is the position height of gas-liquid interface in oil well annular space；φ1For the tubing string internal diameter of oil well；φ2For oil well
Tubing string outer diameter；V1For the aerial volume of nitrogen injection front ring.
In above-mentioned oil well annular space gas-liquid interface measuring method, it is preferred that monitor gas pressure in the oil well annular space and become
Change data also includes later: judging that the nitrogen amount injected in oil well annular space is with gas pressure in oil well annular space by linear formula
It is no linear；When meeting linear formula, pass through gas according to the gas pressure change data and the volume for injecting nitrogen
Body state equation, which calculates, obtains annular volume data；
The linear formula includes:
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0
For nitrogen pressure；V0To inject nitrogen volume flow；V1For the aerial volume of nitrogen injection front ring.
The present invention also provides a kind of oil well annular space gas-liquid interface measurement device, described device includes nitrogen cylinder, electron pressure
Meter and computing module；The nitrogen cylinder is for injecting nitrogen into oil well annular space；The electronic pressure gauge is for monitoring the oil
Gas pressure change data in well annular space；The computing module is used for according to the gas pressure change data and injects nitrogen
Volume is calculated by the equation of gas state and obtains annular volume data；And tubing string parameter and the annular volume according to oil well
Data calculate the position height for obtaining gas-liquid interface in oil well annular space.
In above-mentioned oil well annular space gas-liquid interface measurement device, it is preferred that the computing module includes metering units, described
Metering units are used to be calculated by the following formula the volume for obtaining injection nitrogen: P0×V0=P1×V；P0×V0=n0R0T0；P1×
V=n0R0T0；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0For
Nitrogen pressure；V0To inject nitrogen volume flow；n0For the molal quantity of the gas of injection nitrogen；R0Enter gas for air compressor machine
Case constant；V1For the aerial volume of nitrogen injection front ring；T0Enter the absolute temperature of gas for air compressor machine；V is the body for injecting nitrogen
Product.
In above-mentioned oil well annular space gas-liquid interface measurement device, it is preferred that the computing module includes detection unit, described
Detection unit is used to be calculated by the following formula the volume for obtaining injection nitrogen:
P1×(V1+ V)=P2×V1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1For
The aerial volume of nitrogen injection front ring；V is the volume for injecting nitrogen.
In above-mentioned oil well annular space gas-liquid interface measurement device, it is preferred that the detection unit is also used to through following public affairs
Formula calculates the pressure of gas in annular space after the pressure for obtaining the aerial gas of nitrogen injection front ring and the nitrogen injection:
P1×(V1+ V)=n1R1T1；P2×V1=n1R1T1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1For
The aerial volume of nitrogen injection front ring；n1For the molal quantity of gas total in annular space after injection；R1For the case constant of gas in annular space；
T1For the absolute temperature of gas in annular space.
In above-mentioned oil well annular space gas-liquid interface measurement device, it is preferred that the computing module also includes: passing through following public affairs
Formula calculates the position height for obtaining gas-liquid interface in oil well annular space:
In above formula, h is the position height of gas-liquid interface in oil well annular space；φ1For the tubing string internal diameter of oil well；φ2For oil well
Tubing string outer diameter；V1For the aerial volume of nitrogen injection front ring.
In above-mentioned oil well annular space gas-liquid interface measurement device, it is preferred that described device also includes calibration module, the school
Quasi-mode block is used to judge by linear formula that whether gas pressure to be at line in the nitrogen amount and oil well annular space that inject in oil well annular space
Sexual intercourse；When meeting linear formula, the gas pressure change data and the volume for injecting nitrogen are transferred into the calculating mould
Block, which calculates, obtains annular volume data；
The linear formula includes:
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0
For nitrogen pressure；V0To inject nitrogen volume flow；V1For the aerial volume of nitrogen injection front ring.
The present invention also provides a kind of computer equipment, including memory, processor and storage on a memory and can located
The computer program run on reason device, the processor realize the above method when executing the computer program.
The present invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage has in execution
State the computer program of method.
Oil well annular space gas-liquid interface measuring method provided by the present invention and device be rapidly injected using nitrogen, high-velocity electrons
Pressure gauge sampling carries out analysis to the data on discharge capacity pressure characteristic curve using the equation of gas state and obtains hydrodynamic face data,
Have the characteristics that construction is simple, quickly, not by annular space medium interference and suitable annular space hp-ht well monitor.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Constitute limitation of the invention.In the accompanying drawings:
Fig. 1 is the flow diagram of oil well annular space gas-liquid interface measuring method provided by the present invention；
Fig. 2 is that annular space discharge capacity pressure provided by one embodiment of the invention changes over time situation schematic diagram；
Fig. 3 is oil well annular space hydrops situation schematic diagram provided by one embodiment of the invention；
Fig. 4 is annular space gas compression schematic diagram provided by one embodiment of the invention；
Fig. 5 is the structural schematic diagram of oil well annular space gas-liquid interface measurement device provided by the present invention；
Fig. 6 is the structural schematic diagram of oil well annular space gas-liquid interface measurement device provided by one embodiment of the invention.
Specific embodiment
Understand in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below with reference to embodiment and attached
Figure, is described in further details the present invention.Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention,
But it is not as a limitation of the invention.
Please refer to shown in Fig. 1, oil well annular space gas-liquid interface measuring method provided by the present invention specifically includes: S101 to
Nitrogen is injected in oil well annular space, and monitors gas pressure change data in the oil well annular space；S102 is according to the gas pressure
Delta data and the volume for injecting nitrogen are calculated by the equation of gas state obtains annular volume data；S103 is according to the pipe of oil well
Column parameter and the annular volume data calculate the position height for obtaining gas-liquid interface in oil well annular space.In this embodiment,
Theoretical basis derives from the equation of gas state, considers short time monitoring process, annular space gas is considered as perfect gas；Specifically,
In actual operation, nitrogen cylinder (adding flowmeter) can be used to annular space moment injection nitrogen, nitrogen cylinder internal pressure compares
Height can satisfy the test request of different stage oil well；Due to the injection of nitrogen, annular space gas pressure can be increased instantaneously, be used
High-velocity electrons pressure gauge continuously monitors annular space gas pressure.Since annulus liquid level height is to become the variation with gas pressure and become
Change, that is to say, that the variation of gas pressure and the variation of annulus liquid level height influence each other, pressure, discharge capacity and the liquid of annular space
It will form a kind of equilibrium state between the height of face, as shown in Figure 2；As a result, by using being rapidly injected and high speed pressure meter
Sampling thus can accurately obtain gaseous state amount of the liquid level when generation not is mobile, that is, the pressure monitored with
The linear relationship that injection gas flow has before annulus liquid level does not change；It, then can be in its line when having linear relationship
Property changes phase, is calculated by the equation of gas state, can obtain annular volume size；Then further according to instlated tubular or oil pipe
Outer diameter and casing internal diameter, calculate annular space gas-liquid interface position height；This method have construction is simple, quickly, not by ring
The characteristics of empty medium interference and suitable annular space hp-ht well monitor.
In the above-described embodiments, the volume of the injection nitrogen can be calculated by the following formula acquisition: P0×V0=P1×V；
P0×V0=n0R0T0；P1× V=n0R0T0；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0For
Nitrogen pressure；V0To inject nitrogen volume flow；n0For the molal quantity of the gas of injection nitrogen；R0Enter gas for air compressor machine
Case constant；V1For the aerial volume of nitrogen injection front ring；T0Enter the absolute temperature of gas for air compressor machine；V is the body for injecting nitrogen
Product.
Certainly, such as the related data of position nitrogen cylinder, the body for obtaining the injection nitrogen can also be calculated by the following formula
Product:
P1×(V1+ V)=P2×V1；
In the above-described embodiments, gas in annular space after the pressure of the aerial gas of nitrogen injection front ring and the nitrogen injection
Pressure can be calculated by the following formula acquisition:
P1×(V1+ V)=n1R1T1；P2×V1=n1R1T1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1For
The aerial volume of nitrogen injection front ring；n1For the molal quantity of gas total in annular space after injection；R1For the case constant of gas in annular space；
T1For the absolute temperature of gas in annular space；V is the volume for injecting nitrogen.
In above-mentioned oil well annular space gas-liquid interface measuring method, it is preferred that the tubing string parameter according to oil well and described
The position height that annular volume data calculate gas-liquid interface in acquisition oil well annular space includes: being calculated by the following formula acquisition oil well
The position height of gas-liquid interface in annular space:
In above formula, h is the position height of gas-liquid interface in oil well annular space；φ1For the tubing string internal diameter of oil well；φ2For oil well
Tubing string outer diameter；V1For the aerial volume of nitrogen injection front ring.
For the accuracy for guaranteeing the oil well annular space gas-liquid interface measurement, also reply is oily before calculating the annular volume
The nitrogen amount injected in well annular space with whether gas pressure in oil well annular space linear is verified, for this purpose, in the present invention
In one embodiment, can be judged by linear formula in the nitrogen amount injected in oil well annular space and oil well annular space gas pressure whether at
Linear relationship；When meeting linear formula, pass through gas shape according to the gas pressure change data and the volume for injecting nitrogen
State equation calculation obtains annular volume data；
Wherein, the linear formula includes:
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0
For nitrogen pressure；V0To inject nitrogen volume flow；V1For the aerial volume of nitrogen injection front ring.
To understand above-described embodiment provided by the present invention convenient for clearer, entirety does above-mentioned calculation method below
It is described in detail, please refers to shown in Fig. 3, annular space middle and upper part point is air, and lower part is liquid (oil or water), only it is to be understood that upper part
The volume of gas can be obtained by the depth location in gas-liquid face by calculating.
For this purpose, please referring to shown in Fig. 4, above-mentioned portion gas calculation method of physical volume is as follows:
Step 1:
Before injecting nitrogen to annular space, it is assumed that upper part annular volume is V1, pressure P1It (can be obtained according to well head pressure gauge
Know)；By opening nitrogen cylinder to annular space moment injection nitrogen, while high-velocity electrons pressure gauge being utilized to carry out annular space gas pressure prison
It surveys；It is assumed that volume of the injected slurry volume conversion to before injecting when annular pressure state will inject nitrogen since temperature change is little for V
The process of gas is considered as the isothermal change procedure of gas compression, sees Fig. 2.
State one:
P1×(V1+ V)=n1R1T1； (1)
State two:
P2×V1=n1R1T1； (2)
According to gas Isothermal State Equation:
P1×(V1+ V)=P2×V1； (3)
In above formula: P1The pressure of the aerial gas of-nitrogen injection front ring, MPa；P2After-nitrogen injection in annular space gas pressure,
MPa；V1The aerial volume of-nitrogen injection front ring, m3；V-injection nitrogen volume (conversion state to before infusing), m3(translation method is detailed
See step 3)；n1The molal quantity of gas total in annular space, mol after-injection；R1The case constant of gas in-annular space, it is no because
It is secondary；T1The absolute temperature of gas, K in-annular space.
It can be seen that P from above conclusion1、V、P2It is known quantity, is all live actual test value, wherein P2By high speed electricity
Sub- pressure gauge monitoring show that specific obtaining value method is shown in step 4.Therefore the injection aerial gas volume V of front ring can simply be obtained1
Size.
Step 2:
About wellbore effusion depth computing method, then gas-liquid position, specific convert formula can be converted into according to shaft structure
Are as follows:
In above formula: h-annular space gas-liquid depth (from well head to liquid level), m；φ1- casing inner diameter, mm；φ2- heat-insulated
Pipe or oil pipe outer diameter, mm.
Step 3:
About injection nitrogen amount translation method
It is assumed that the injection gas volume that nitrogen cylinder provides is V0, pressure P0, the gas volume after being injected into oil well annular space is
V, pressure P1(wellbore environment), passes through isothermal changes of state.
State one:
P0×V0=n0R0T0； (5)
State two:
P1× V=n0R0T0； (6)
According to gas Isothermal State Equation:
P0×V0=P1×V； (7)
In above formula: P0- nitrogen pressure (on-the-spot test obtains), MPa；V0- injection nitrogen volume flow (bottleneck flow
Measurement examination obtains), m3；n0The molal quantity of the gas of-injection nitrogen, mol；R0- air compressor machine enters the case constant of gas, nothing
Dimension；T0- air compressor machine enters the absolute temperature (standard state) of gas, K.
It can be seen that, P0、V0、P1It is known quantity, therefore can simply obtains the size of injection nitrogen amount V.In conjunction with formula (3)
(7) it can obtain:
Step 4:
Test obtaining value method
According to above formula, it can be deduced that before annulus liquid level change in location, inject nitrogen amount V0With ring after nitrogen injection
The pressure P of aerial gas2It is linear:
Wherein, P1For known quantity, V1For unknown quantity (being fixed value before annulus liquid level variation), P0It is stabilized for nitrogen cylinder
Pressure (fixed value) when nitrogen.Therefore, according to formula (9), it is known that, inject nitrogen amount V0With gas in annular space after nitrogen injection
Pressure P2Between relationship be linear.When testing at the scene, oil when high-velocity electrons pressure gauge monitoring moment injection nitrogen is utilized
The pressure value of well annular space gas can obtain the curve of note a nitrogen quantity and oil well annular space gas pressure.Meeting when this curve starts
There are one section of linearity curve, oil well annulus liquid level position does not change in time period, arbitrarily takes one in linearity curve section
Point, in conjunction with above-mentioned calculation formula, so that it may convert the position of producing well annular space gas-liquid interface.
It please refers to shown in Fig. 5, the present invention also provides a kind of oil well annular space gas-liquid interface measurement device, described device includes nitrogen
Gas cylinder, electronic pressure gauge and computing module；The nitrogen cylinder is for injecting nitrogen into oil well annular space；The electronic pressure gauge is used
In gas pressure change data in the monitoring oil well annular space；The computing module is used for according to the gas pressure change data
And the volume of injection nitrogen is calculated by the equation of gas state and obtains annular volume data；And according to the tubing string parameter of oil well and
The annular volume data calculate the position height for obtaining gas-liquid interface in oil well annular space.
It please refers to shown in Fig. 6, in above-mentioned oil well annular space gas-liquid interface measurement device, the computing module includes that metering is single
Member, the metering units are used to be calculated by the following formula the volume for obtaining injection nitrogen: P0×V0=P1×V；P0×V0=
n0R0T0；P1× V=n0R0T0；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0For
Nitrogen pressure；V0To inject nitrogen volume flow；n0For the molal quantity of the gas of injection nitrogen；R0Enter gas for air compressor machine
Case constant；V1For the aerial volume of nitrogen injection front ring；T0Enter the absolute temperature of gas for air compressor machine；V is the body for injecting nitrogen
Product.
In an embodiment of the present invention, the computing module includes detection unit, and the detection unit is used for by following
Formula calculates the volume for obtaining injection nitrogen:
P1×(V1+ V)=P2×V1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1For
The aerial volume of nitrogen injection front ring；V is the volume for injecting nitrogen.Wherein, the detection unit is also used to be calculated by the following formula
Obtain the aerial gas of nitrogen injection front ring pressure and the nitrogen injection after in annular space gas pressure:
P1×(V1+ V)=n1R1T1；P2×V1=n1R1T1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1For
The aerial volume of nitrogen injection front ring；n1For the molal quantity of gas total in annular space after injection；R1For the case constant of gas in annular space；
T1For the absolute temperature of gas in annular space.
In an embodiment of the present invention, the computing module also includes: being calculated by the following formula and obtains in oil well annular space
The position height of gas-liquid interface:
In above formula, h is the position height of gas-liquid interface in oil well annular space；φ1For the tubing string internal diameter of oil well；φ2For oil well
Tubing string outer diameter；V1For the aerial volume of nitrogen injection front ring.
In an embodiment of the present invention, described device also includes calibration module, and the calibration module is used for by linear public
Formula judges whether the nitrogen amount and gas pressure in oil well annular space that inject in oil well annular space are linear；When meeting linear formula
When, transfer to the computing module to calculate acquisition annular volume number the gas pressure change data and the volume for injecting nitrogen
According to；
The linear formula includes:
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0
For nitrogen pressure；V0To inject nitrogen volume flow；V1For the aerial volume of nitrogen injection front ring.
The present invention also provides a kind of computer equipment, including memory, processor and storage on a memory and can located
The computer program run on reason device, the processor realize the above method when executing the computer program.
The present invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage has in execution
State the computer program of method.
Oil well annular space gas-liquid interface measuring method provided by the present invention and device be rapidly injected using nitrogen, high-velocity electrons
Pressure gauge sampling carries out analysis to the data on discharge capacity pressure characteristic curve using the equation of gas state and obtains hydrodynamic face data,
Have the characteristics that construction is simple, quickly, not by annular space medium interference and suitable annular space hp-ht well monitor.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide 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, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or 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 counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (15)
1. a kind of oil well annular space gas-liquid interface measuring method, which is characterized in that the method includes:
Nitrogen is injected into oil well annular space, and monitors gas pressure change data in the oil well annular space；
Acquisition annular volume is calculated by the equation of gas state according to the gas pressure change data and the volume for injecting nitrogen
Data；
The position height for obtaining gas-liquid interface in oil well annular space is calculated according to the tubing string parameter of oil well and the annular volume data.
2. oil well annular space gas-liquid interface measuring method according to claim 1, which is characterized in that injected into oil well annular space
Nitrogen, and monitor gas pressure change data in the oil well annular space and include: nitrogen is injected into the oil well by nitrogen cylinder
And gas pressure change data in the oil well annular space are monitored by electronic pressure gauge.
3. oil well annular space gas-liquid interface measuring method according to claim 2, which is characterized in that the body of the injection nitrogen
Product is calculated by the following formula acquisition:
P0×V0=P1×V；
P0×V0=n0R0T0；
P1× V=n0R0T0；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0For nitrogen
Bottle pressure；V0To inject nitrogen volume flow；n0For the molal quantity of the gas of injection nitrogen；R0Enter the shape of gas for air compressor machine
State constant；V1For the aerial volume of nitrogen injection front ring；T0Enter the absolute temperature of gas for air compressor machine；V is the volume for injecting nitrogen.
4. oil well annular space gas-liquid interface measuring method according to claim 1, which is characterized in that the body of the injection nitrogen
Product is calculated by the following formula acquisition:
P1×(V1+ V)=P2×V1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1To infuse nitrogen
The aerial volume of gas front ring；V is the volume for injecting nitrogen.
5. oil well annular space gas-liquid interface measuring method according to claim 4, which is characterized in that annular space before the nitrogen injection
The pressure of gas is calculated by the following formula acquisition in annular space after the pressure of middle gas and the nitrogen injection:
P1×(V1+ V)=n1R1T1；
P2×V1=n1R1T1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1To infuse nitrogen
The aerial volume of gas front ring；n1For the molal quantity of gas total in annular space after injection；R1For the case constant of gas in annular space；T1For
The absolute temperature of gas in annular space.
6. oil well annular space gas-liquid interface measuring method according to claim 1, which is characterized in that the pipe according to oil well
The position height that column parameter and the annular volume data calculate gas-liquid interface in acquisition oil well annular space includes: passing through following formula
Calculate the position height for obtaining gas-liquid interface in oil well annular space:
In above formula, h is the position height of gas-liquid interface in oil well annular space；φ1For the tubing string internal diameter of oil well；φ2For the tubing string of oil well
Outer diameter；V1For the aerial volume of nitrogen injection front ring.
7. oil well annular space gas-liquid interface measuring method according to any one of claim 1 to 6, which is characterized in that monitoring
Also include after gas pressure change data in the oil well annular space: judging the nitrogen injected in oil well annular space by linear formula
It measures whether linear with gas pressure in oil well annular space；When meeting linear formula, according to the gas pressure change number
According to and injection nitrogen volume by the equation of gas state calculate acquisition annular volume data；
The linear formula includes:
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0For nitrogen
Storage pressure；V0To inject nitrogen volume flow；V1For the aerial volume of nitrogen injection front ring.
8. a kind of oil well annular space gas-liquid interface measurement device, which is characterized in that described device include nitrogen cylinder, electronic pressure gauge and
Computing module；
The nitrogen cylinder is for injecting nitrogen into oil well annular space；
The electronic pressure gauge is for monitoring gas pressure change data in the oil well annular space；
The computing module is used to pass through the equation of gas state according to the volume of the gas pressure change data and injection nitrogen
It calculates and obtains annular volume data；And it is calculated according to the tubing string parameter of oil well and the annular volume data and obtains oil well annular space
The position height of interior gas-liquid interface.
9. oil well annular space gas-liquid interface measurement device according to claim 8, which is characterized in that the computing module includes
Metering units, the metering units are used to be calculated by the following formula the volume for obtaining injection nitrogen:
P0×V0=P1×V；
P0×V0=n0R0T0；
P1× V=n0R0T0；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0For nitrogen
Bottle pressure；V0To inject nitrogen volume flow；n0For the molal quantity of the gas of injection nitrogen；R0Enter the shape of gas for air compressor machine
State constant；V1For the aerial volume of nitrogen injection front ring；T0Enter the absolute temperature of gas for air compressor machine；V is the volume for injecting nitrogen.
10. oil well annular space gas-liquid interface measurement device according to claim 8, which is characterized in that the computing module packet
Containing detection unit, the detection unit is used to be calculated by the following formula the volume for obtaining injection nitrogen:
P1×(V1+ V)=P2×V1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1To infuse nitrogen
The aerial volume of gas front ring；V is the volume for injecting nitrogen.
11. oil well annular space gas-liquid interface measurement device according to claim 10, which is characterized in that the detection unit is also
For be calculated by the following formula obtain the aerial gas of nitrogen injection front ring pressure and the nitrogen injection after in annular space gas pressure
Power:
P1×(V1+ V)=n1R1T1；
P2×V1=n1R1T1；
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；V1To infuse nitrogen
The aerial volume of gas front ring；n1For the molal quantity of gas total in annular space after injection；R1For the case constant of gas in annular space；T1For
The absolute temperature of gas in annular space.
12. oil well annular space gas-liquid interface measurement device according to claim 8, which is characterized in that the computing module is also
Include: being calculated by the following formula the position height for obtaining gas-liquid interface in oil well annular space:
In above formula, h is the position height of gas-liquid interface in oil well annular space；φ1For the tubing string internal diameter of oil well；φ2For the tubing string of oil well
Outer diameter；V1For the aerial volume of nitrogen injection front ring.
13. the oil well annular space gas-liquid interface measurement device according to any one of claim 8 to 12, which is characterized in that institute
Stating device also includes calibration module, the calibration module be used to judge by linear formula in oil well annular space the nitrogen amount of injection and
Whether gas pressure is linear in oil well annular space；When meeting linear formula, by the gas pressure change data and note
The volume for entering nitrogen transfers to the computing module to calculate and obtains annular volume data；
The linear formula includes:
In above formula, P1For the pressure of the aerial gas of nitrogen injection front ring；P2For the pressure of gas in annular space after nitrogen injection；P0For nitrogen
Storage pressure；V0To inject nitrogen volume flow；V1For the aerial volume of nitrogen injection front ring.
14. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor realizes any side of claim 1 to 7 when executing the computer program
Method.
15. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has perform claim
It is required that the computer program of 1 to 7 any the method.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| US11629990B2 (en) | 2020-05-21 | 2023-04-18 | Saudi Arabian Oil Company | System and method to measure mud level in a wellbore annulus |
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