CN113738346A - Method and device for acquiring working fluid level depth of heavy oil well - Google Patents
Method and device for acquiring working fluid level depth of heavy oil well Download PDFInfo
- Publication number
- CN113738346A CN113738346A CN202010460869.XA CN202010460869A CN113738346A CN 113738346 A CN113738346 A CN 113738346A CN 202010460869 A CN202010460869 A CN 202010460869A CN 113738346 A CN113738346 A CN 113738346A
- Authority
- CN
- China
- Prior art keywords
- working fluid
- fluid level
- depth
- pressure
- oil well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
Abstract
The invention relates to a method and a device for acquiring the working fluid level depth of a heavy oil well. The method comprises the steps of obtaining the annular volume of an oil sleeve above a working fluid level; acquiring the inner diameter of the sleeve; acquiring the outer diameter of an oil pipe; and obtaining the working fluid level of the heavy oil well through the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve and the outer diameter of the oil pipe. The viscous oil well working fluid level obtained by the method provided by the embodiment of the application has high accuracy, and the problems that field technicians manually interpret the error by using conventional sound wave tests, cannot interpret the position of the fluid level and cannot measure the working fluid level or cannot measure the working fluid level are solved.
Description
Technical Field
The invention relates to the technical field of oil extraction in the petroleum industry, in particular to a method and a device for acquiring the working fluid level depth of a heavy oil well.
Background
The working fluid level is the fluid level formed by the oil pipe and the annular space of the casing pipe when the heavy oil well is normally produced. The working fluid level depth can be expressed in terms of depth from the wellhead or height from the middle of the reservoir. The oil reservoir dynamic liquid level standards are different for different reservoir blocks due to different physical properties of reservoir strata and different oil properties. The liquid supply capacity of the heavy oil well can be analyzed by calculating the submergence degree according to the working fluid level depth and referring to production parameters such as the diameter of a pump, the oil reservoir pressure and an indicator diagram, and the energy condition of a production layer is further reflected. The working fluid level depth of the heavy oil well directly reflects the liquid supply condition of an oil layer and the underground supply and discharge relation, and is one of key data for evaluating and optimizing the adaptability of the oil extraction process.
According to the traditional dynamic liquid level depth testing method, sound waves are emitted to the thick oil well, and then the returned sound waves are analyzed and processed to obtain the dynamic liquid level depth of the thick oil well.
However, the method is difficult to measure the working fluid level depth or cannot directly measure the working fluid level depth when aiming at the heavy oil well, and the screw pump positioned in the heavy oil well is very easy to evacuate and damage.
Disclosure of Invention
The embodiment of the invention provides a method and a device for acquiring the working fluid level depth of a heavy oil well, which can solve the technical problems that the working fluid level parameters are difficult to measure or the working fluid level can not be directly measured when the heavy oil well is used, and a screw pump positioned in the heavy oil well is very easy to evacuate and damage. The specific technical scheme is as follows:
in one aspect, a method for acquiring the dynamic liquid level depth of a heavy oil well is provided, and the method comprises the following steps:
acquiring the annular volume of the oil sleeve above the working fluid level;
acquiring the inner diameter of the sleeve;
acquiring the outer diameter of an oil pipe;
and obtaining the working fluid level depth of the heavy oil well through the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve and the outer diameter of the oil pipe.
In an alternative embodiment, said obtaining said heavy oil well working fluid level depth from said oil casing annulus volume above said working fluid level, said casing inner diameter, and said tubing outer diameter comprises: and obtaining the depth of the working fluid level of the heavy oil well according to the following formula by the inner diameter of the casing and the outer diameter of the oil pipe:
wherein, V2Is the annular volume of the oil sleeve above the working fluid level, pi is a constant, D1Is the inner diameter of the casing, D2The outer diameter of the oil pipe is H, and the working fluid level depth of the heavy oil well is H.
In an optional embodiment, the obtaining the annular volume of the oil jacket above the working fluid level comprises:
acquiring an initial pressure of the test container;
acquiring the volume of the test container;
filling gas into the oil sleeve annulus for the first time through the test container, so that the gas in the oil sleeve annulus reaches micro-positive pressure, and obtaining first pressure when the oil sleeve annulus is filled with the gas for the first time;
obtaining the residual pressure of the test container after the oil sleeve annulus is filled with gas for the first time, so that the pressure in the oil sleeve annulus is greater than the first pressure;
acquiring a second pressure when the oil sleeve annulus is inflated for the second time;
and obtaining the annular volume of the oil sleeve above the working fluid level according to the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure and the second pressure.
In an optional embodiment, the deriving the above-working fluid level oil jacket annular volume from the initial pressure of the test vessel, the volume of the test vessel, the first pressure, the residual pressure, and the second pressure comprises: obtaining the annular volume of the oil sleeve above the working fluid level according to the following formula by using the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure and the second pressure:
wherein, P0Is the initial pressure of the test vessel; p1The first pressure; p2Is the residual pressure; p3Is the second pressure, V1Is the volume of the test vessel, V2The annular volume of the oil sleeve above the working fluid level is represented by pi which is a constant.
In an optional embodiment, after obtaining the viscous oil well working fluid level depth from the oil casing annulus volume above the working fluid level, the casing inner diameter, and the tubing outer diameter, the method further comprises:
acquiring the depth of a screw pump in a heavy oil well;
acquiring the depth of the screw pump entering the working fluid level;
if the dynamic liquid level of the heavy oil well is smaller than the depth of the screw pump in the heavy oil well, taking the dynamic liquid level depth of the heavy oil well as the target dynamic liquid level depth of the heavy oil well;
and if the dynamic liquid level of the heavy oil well is greater than the depth of the screw pump in the heavy oil well, taking the sum of the depth of the screw pump in the heavy oil well and the depth of the screw pump in the dynamic liquid level as the target dynamic liquid level depth of the heavy oil well.
In an optional embodiment, if the thick oil well dynamic fluid level is greater than the depth of the screw pump lowered into the thick oil well, taking the sum of the depth of the screw pump lowered into the thick oil well and the depth of the screw pump lowered dynamic fluid level as the thick oil well target dynamic fluid level depth comprises: and obtaining the target working fluid level depth of the heavy oil well according to the following formula by using the volume of the test container, the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve, the outer diameter of the oil pipe, the depth of the screw pump in the heavy oil well and the depth of the screw pump in the working fluid level:
H＝H1+H2；
wherein, V1Is the volume of the test vessel, V2Is the annular volume of the oil jacket above the working fluid level, D1Is the inner diameter of the casing, D2Is the outer diameter of the oil pipe, pi is a constant, H1The depth of the screw pump in the heavy oil well, H2The depth of the screw pump entering the working fluid level is H, and the depth of the target working fluid level of the heavy oil well is H.
In another aspect, there is provided a thick oil well working fluid level depth acquisition apparatus, the apparatus including:
the first acquisition unit is used for acquiring the annular volume of the oil sleeve above the working fluid level;
the second acquisition unit is used for acquiring the inner diameter of the sleeve;
the third obtaining unit is used for obtaining the outer diameter of the oil pipe;
and the fourth acquisition unit is used for acquiring the working fluid level depth of the heavy oil well through the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve and the outer diameter of the oil pipe.
In an optional embodiment, the fourth obtaining unit is configured to obtain the viscous oil well dynamic liquid level depth according to a formula through the casing inner diameter, the oil pipe outer diameter, and the viscous oil well dynamic liquid level:
wherein, V2Is the annular volume of the oil sleeve above the working fluid level, pi is a constant, D1Is the inner diameter of the casing, D2The outer diameter of the oil pipe is H, and the working fluid level depth of the heavy oil well is H.
In an optional implementation, the first obtaining unit includes:
a first acquiring subunit, configured to acquire an initial pressure of the test container;
a second acquiring subunit that acquires a volume of the test container;
the third acquiring subunit is used for filling gas into the oil sleeve annulus for the first time through the test container to acquire first pressure when the oil sleeve annulus is filled with the gas for the first time;
the fourth acquiring subunit is used for acquiring the residual pressure of the test container after the oil sleeve annulus is filled with gas for the first time;
the fifth acquiring subunit is used for acquiring a second pressure when the oil sleeve annulus is inflated with gas for the second time;
and the sixth obtaining subunit is configured to obtain an oil jacket annular volume above the working fluid level according to the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure, and the second pressure.
In an optional embodiment, the fifth obtaining subunit is configured to obtain, from the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure, and the second pressure, an oil jacket annulus volume above the working fluid level according to the following formula:
wherein, P0Is the initial pressure of the test vessel; p1The first pressure; p2Is the residual pressure; p3Is the second pressure, V1Is the volume of the test vessel, V2The annular volume of the oil sleeve above the working fluid level is represented by pi which is a constant.
Optionally, after the fourth obtaining unit, the apparatus further includes:
and the fifth acquisition unit is used for acquiring the depth of the screw pump in the heavy oil well.
And the sixth acquisition unit is used for acquiring the depth of the screw pump entering the working fluid level.
A seventh obtaining unit, configured to, if the dynamic liquid level of the heavy oil well is smaller than the depth of the screw pump lowered into the heavy oil well, use the dynamic liquid level depth of the heavy oil well as the target dynamic liquid level of the heavy oil well; and if the dynamic liquid level of the heavy oil well is greater than the depth of the screw pump in the heavy oil well, taking the sum of the depth of the screw pump in the heavy oil well and the depth of the screw pump in the dynamic liquid level as the target dynamic liquid level depth of the heavy oil well.
Optionally, the seventh obtaining unit is configured to obtain the target working fluid level depth of the heavy oil well according to the following formula by using the volume of the test container, the annular volume of the oil casing above the working fluid level, the inner diameter of the casing, the outer diameter of the oil pipe, the depth of the screw pump in the heavy oil well, and the depth of the working fluid level of the screw pump in the heavy oil well:
H＝H1+H2；
wherein, V1Is the volume of the test vessel, V2Is the annular volume of the oil jacket above the working fluid level, D1Is the inner diameter of the casing, D2Is the outer diameter of the oil pipe, pi is a constant, H1The depth of the screw pump in the heavy oil well, H2The depth of the screw pump entering the working fluid level is H, and the depth of the target working fluid level of the heavy oil well is H.
The technical scheme of the invention at least has the following beneficial effects:
the depth of the working fluid level of the heavy oil well obtained by the method provided by the embodiment of the application is high in accuracy, and the problems that field technicians manually interpret the error by utilizing conventional sound wave tests, cannot interpret the position of the working fluid level and cannot measure the working fluid level or cannot measure the working fluid level are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for acquiring the working fluid level depth of a heavy oil well according to an embodiment of the invention;
FIG. 2 is a schematic flow chart of a method for acquiring the working fluid level depth of a heavy oil well according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a device for acquiring the depth of the working fluid level of the heavy oil well according to the embodiment of the present invention.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
At present, the dynamic liquid level test of the heavy oil well adopting the screw pump is divided into two types of sound wave test and sleeve water filling. The sound wave test is manual interpretation, and because the screw pump can generate noise with complex frequency spectrum in the operation process, the error of the dynamic liquid level test result of the heavy oil well is larger, and even the position of the dynamic liquid level can not be interpreted. For thick oil wells with no dynamic liquid level measurement, whether the supply and discharge relationship is coordinated or not is not known, working parameters cannot be formulated accurately, extraction liquid yield increase measures cannot be formulated, small parameter production is adjusted to ensure safe production and prevent the screw pump in a deep well from being pumped out to cause failure, and even a part of thick oil wells adopting the screw pumps are forced to be switched on or switched off to stop production, so that the yield reduction is influenced. In view of this, the embodiment of the present application provides a method and an apparatus for obtaining a working fluid level depth of a heavy oil well, which aim to solve the above technical problems.
In one aspect, a method for acquiring the working fluid level depth of a heavy oil well is provided, as shown in fig. 1, and the method comprises the following steps:
and S11, acquiring the annular volume of the oil sleeve above the working fluid level.
Alternatively, as shown in fig. 2, S11 includes:
and S21, acquiring the initial pressure of the test container.
It can be understood that the volume of the oil jacket annulus above the working fluid level is difficult to obtain through measurement, and therefore, the volume above the working fluid level oil jacket annulus is obtained through testing the container in the embodiment of the application. For example, the pressure of the oil jacket annulus above the working fluid level may be obtained by a pressure measuring instrument, and the volume and pressure of the test container are known, i.e., when the volume of the test container is constant, the initial pressure of the test container may be measured by a pressure sensor. Therefore, pressure can be injected into the oil jacket annulus through the test vessel, and when the pressure in the oil jacket annulus and the pressure in the test vessel are balanced, PV ═ nRT, (PV) can be passedOil sleeve annulus＝(PV)Test containerAnd obtaining the volume of the oil sleeve annulus above the working fluid level, wherein P is the pressure, V is the volume, n is the number of molecules, and R is a constant.
Further, the initial pressure of the test container is firstly measured through the pressure sensor, when the pressure is injected into the oil casing annulus through the test container, the pressure in the test container is reduced, and the pressure injected into the oil casing annulus can be obtained through the final pressure and the initial pressure of the test container.
And S22, acquiring the volume of the test container.
The volume of the test container can be measured in certain cases. The method for measuring the test container is not limited in the embodiments of the present application.
It should be noted that, the method provided by the related art needs to acquire the volume of the gas injected into the oil jacket annulus, and the volume of the gas injected into the oil jacket annulus is an ideal state, and the gas is difficult to acquire after being injected into the oil jacket annulus. Compared with the related art, the working fluid level testing efficiency is improved, and the testing difficulty is reduced.
S23, filling gas into the oil sleeve annulus for the first time through the test container, and obtaining a first pressure when the oil sleeve annulus is filled with the gas for the first time.
It should be noted that, after the gas is injected into the oil casing annulus for the first time and a certain pressure is maintained in the oil casing annulus, the gas is continuously injected into the oil casing annulus, so that the pressure in the oil casing annulus is the same as the pressure in the test container. At this point, the pressure in the oil jacket annulus, i.e., the pressure of the test vessel at this point, is obtained.
As an example, the test container provided in this embodiment of the present application may be a compressed gas cylinder, and the compressed gas cylinder filled with inert gas fills the oil jacket annular space with inert gas, so that the pressure in the oil jacket annular space reaches a reference value, for example, when the pressure in the oil jacket annular space reaches 0.1MPa, the inert gas is stopped being injected, so that the pressure in the oil jacket annular space reaches a slight positive pressure, and the test obtains the content of the residual gas in the compressed gas cylinder, that is, the first pressure provided in this embodiment of the present application.
And S24, obtaining the residual pressure of the container after the oil sleeve annulus is filled with gas for the first time.
And when the pressure in the oil sleeve annulus reaches the micro-positive pressure, gas is continuously filled into the oil sleeve annulus, so that the micro-positive pressure is kept in the oil sleeve annulus, and then the residual pressure of the test container is obtained. In the above step S11, the initial pressure of the test container is obtained, and the residual pressure of the test container after the first gas filling into the oil jacket annulus is obtained, and the difference between the residual pressure and the initial pressure value of the test container is the pressure injected into the oil jacket annulus.
And S25, filling gas into the oil sleeve annulus for the second time through the test container, and obtaining a second pressure when the oil sleeve annulus is filled with the gas for the second time.
It should be noted that, by testing the pressure injected into the oil jacket annulus for the second time by the container, the pressure in the test container may be obtained by a pressure sensor or a pressure test instrument, and the second pressure is obtained by the difference between the pressure and the residual pressure, or when the oil jacket annulus is filled with gas for the second time by the test container, the pressure in the test container may be obtained by the pressure sensor in advance, and the pressure in the test container may be measured after the gas is filled into the oil jacket annulus for the second time, and the difference between the pressure in the test container when the gas is filled for the second time and the pressure filled into the oil jacket annulus for the second time is used as the second pressure. The method for measuring the test container is not limited in the embodiments of the present application.
And S26, obtaining the annular volume of the oil jacket above the working fluid level according to the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure and the second pressure.
Optionally, S26 includes: the annular volume of the oil sleeve above the working fluid level is obtained through the following formulas of the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure and the second pressure:
wherein, P0Is the initial pressure of the test vessel; p1A first pressure; p2Is the residual pressure; p3Is a pressure of two, V1For testing the volume of the container, V2The annular volume of the oil sleeve above the working fluid level is shown, and pi is a constant.
I.e. V obtained when the two sides of the above equation are equal2Is the annular volume of the oil sleeve above the working fluid level.
It should be noted that the universal gas law is a state equation describing the relationship between pressure, volume, amount of substance, and temperature when an ideal gas is in an equilibrium state. It is established on the empirical laws of Boyle-Mariotte's law, Charles ' law, Geiger-Lusaka's law, etc. The equation is pV ═ nRT. This equation has 4 variables: p refers to the pressure of the ideal gas, V is the volume of the ideal gas, n represents the amount of gaseous species, and T represents the thermodynamic temperature of the ideal gas; there is also a constant: r is an ideal gas constant.
That is to say, in the method provided in the embodiment of the present application, when gas is injected into the oil jacket annulus above the working fluid level through the test container, a closed space is formed above the test container and the working fluid level, at this time, the total amount of molecules above the working fluid level is equal to that in the test container, and on the premise that the temperatures are equal, the product of the pressure and the volume of the oil jacket annulus above the working fluid level is equal to the product of the pressure and the volume in the test container. Namely, as long as the pressure and the volume of the test container are obtained, the volume of the oil sleeve annulus above the working fluid level can be obtained when the pressure above the test container and the pressure above the oil sleeve annulus are equal.
And S12, acquiring the inner diameter of the sleeve.
The inside diameter of the casing can be obtained by measurement. The embodiment of the application does not limit the inner diameter obtaining mode of the sleeve.
And S13, acquiring the outer diameter of the oil pipe.
The outer diameter of the tubing can be obtained by measurement. The embodiment of the application does not limit the inner diameter obtaining mode of the sleeve.
And S14, obtaining the working fluid level depth of the viscous oil well through the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve and the outer diameter of the oil pipe.
It should be noted that according to the law of conservation of energy, the total energy in a closed (isolated) system is kept constant. The total energy is not only the sum of kinetic energy and potential energy, but also the total amount of static energy (inherent energy), kinetic energy and potential energy. May be given by the formula V ═ π R2H, where V is the volume, π is a constant, R is the radius, and H is the height.
In the space formed by the heavy oil well, namely the space energy conservation formed by the annular space formed by the oil pipe and the casing and the oil sleeve annular space above the working fluid level, therefore, the depth of the working fluid level of the heavy oil well can be obtained according to the energy conservation after the inner diameter of the casing, the outer diameter of the oil pipe and the volume of the oil sleeve annular space above the working fluid level are obtained.
Optionally, S14 includes: the dynamic liquid level depth of the heavy oil well is obtained by the following formula:
wherein, V2Is the annular volume of the oil sleeve above the working fluid level, pi is a constant, D1Is the inner diameter of the casing, D2The outer diameter of the oil pipe is H, and the working fluid level depth of the heavy oil well is H.
And substituting the obtained annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve and the outer diameter of the oil pipe into the formula to obtain the working fluid level depth of the heavy oil well.
Optionally, after S14, the method provided in the embodiment of the present application further includes:
and S31, acquiring the depth of the screw pump in the heavy oil well.
It should be noted that the screw pump is not easy to have the rod pipe eccentric wear problem in the heavy oil well lifting process. The screw pump unit puts the motor, the winding shaft of the speed reducer and the screw pump, namely the cable, into the well, and the screw pump is connected with the oil pipe and the ground pipeline. After the ground power supply is connected through the transformer, the control cabinet and the junction box, the electric energy is transmitted to the underground motor through the cable, the motor rotates to drive the screw pump through the flexible shaft, and the purpose of lifting well fluid in the oil well is achieved.
In view of this, the depth of the screw pump lowered into the heavy oil well can be obtained through actual measurement, and the measurement method is not limited in the embodiment of the application.
And S32, acquiring the depth of the screw pump entering the working fluid level.
It should be noted that the depth of the screw pump entering the working fluid level can be estimated in advance according to empirical values. As an example, the depth of the screw pump entering the working fluid level can be estimated according to an empirical value in the normal operation process, and the calculation can also be performed according to a theoretical formula, and the calculation mode is not limited in the embodiment of the application.
And S33, if the dynamic liquid level of the thick oil well is smaller than the depth of the screw pump in the thick oil well, taking the dynamic liquid level depth of the thick oil well as the target dynamic liquid level depth of the thick oil well.
And S34, if the dynamic liquid level depth of the heavy oil well is greater than the depth of the screw pump in the heavy oil well, taking the sum of the depth of the screw pump in the heavy oil well and the depth of the screw pump in the dynamic liquid level as the target dynamic liquid level depth of the heavy oil well.
It should be noted that if the working fluid level depth of the heavy oil well is greater than the depth of the screw pump inserted into the heavy oil well, it indicates that an error occurs in the calculation process, and at this time, the sum of the depth of the screw pump inserted into the heavy oil well and the depth of the screw pump inserted into the working fluid level is used as the target working fluid level of the heavy oil well.
It should be noted that the working fluid level depth of the heavy oil well is not greater than the depth of the screw pump inserted into the heavy oil well, and therefore, when the working fluid level depth obtained by the above formula is greater than the depth of the screw pump inserted into the heavy oil well, the obtained working fluid level depth needs to be corrected, that is, the depth of the screw pump inserted into the heavy oil well and the depth of the screw pump inserted into the working fluid level are taken as the working fluid level depth.
Optionally, S34 includes: the target working fluid level depth of the heavy oil well is obtained according to the following formula by testing the volume of the container, the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve, the outer diameter of the oil pipe, the depth of the screw pump in the heavy oil well and the depth of the screw pump in the working fluid level:
H＝H1+H2；
wherein, V1Is the volume of the test vessel, V2Is the annular volume of the oil jacket above the working fluid level, D1Is the inner diameter of the casing, D2Is the outer diameter of the oil pipe, pi is a constant, H1The depth of the screw pump in the heavy oil well, H2The depth of the screw pump entering the working fluid level is H, and the depth of the target working fluid level of the heavy oil well is H.
It should be noted that the depth of the screw pump inserted into the heavy oil well can be obtained through actual measurement, and the depth of the screw pump inserted into the working fluid level can also be obtained through calculation according to actual operation experience.
The method provided by the embodiment of the application has at least the following beneficial effects:
the method for obtaining the working fluid level depth of the heavy oil well overcomes the problems that field technicians manually interpret the error by using conventional sound wave tests, cannot interpret the position of the fluid level, and cannot measure the working fluid level depth or cannot measure the working fluid level depth.
The method provided by the embodiment of the application is used for carrying out actual operation, the on-site application is carried out on more than 10 wells, the success rate is 90%, a large amount of manual testing workload is saved, and guidance is provided for daily management of the screw pump well.
On the other hand, this application embodiment still provides a thick oil well working fluid level depth obtains device, as shown in fig. 3, the device includes:
the first obtaining unit 301 is used for obtaining the annular volume of the oil sleeve above the working fluid level;
a second obtaining unit 302 for obtaining the inner diameter of the casing;
a third obtaining unit 303, configured to obtain an outer diameter of the oil pipe;
and the fourth obtaining unit 304 is used for obtaining the working fluid level depth of the heavy oil well through the annular volume of the oil casing above the working fluid level, the inner diameter of the casing and the outer diameter of the oil pipe.
Optionally, the fourth obtaining unit 304 is configured to obtain the viscous oil well dynamic liquid level depth through the casing inner diameter, the oil pipe outer diameter, and the viscous oil well dynamic liquid level according to the following formula:
wherein V2 is the annular volume of the oil sleeve above the working fluid level, pi is a constant, D1 is the inner diameter of the sleeve, D2 is the outer diameter of the oil pipe, and H is the working fluid level depth of the heavy oil well.
Optionally, the first obtaining unit 301 includes:
the first acquisition subunit is used for acquiring the initial pressure of the test container.
And the second acquiring subunit is used for acquiring the volume of the test container.
And the third acquisition subunit is used for filling gas into the oil sleeve annulus for the first time through the test container to acquire the first pressure when the oil sleeve annulus is filled with the gas for the first time.
And the fourth acquiring subunit is used for acquiring the residual pressure of the testing container after the oil sleeve annulus is filled with gas for the first time.
And the fifth acquiring subunit is used for filling gas into the oil sleeve annulus for the second time through the test container to acquire a second pressure when the oil sleeve annulus is filled with gas for the second time.
And the sixth acquiring subunit is used for acquiring the annular volume of the oil sleeve above the working fluid level according to the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure and the second pressure.
Optionally, the sixth obtaining subunit is configured to obtain the annular volume of the oil jacket above the working fluid level according to the following formula by using the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure, and the second pressure:
wherein, P0Is the initial pressure of the test vessel; p1A first pressure; p2Is the residual pressure; p3Is a second pressure, V1For testing the volume of the container, V2The annular volume of the oil sleeve above the working fluid level is shown, and pi is a constant.
Optionally, after the fourth obtaining unit 304, the apparatus further includes:
and the fifth acquisition unit is used for acquiring the depth of the screw pump in the heavy oil well.
And the sixth acquisition unit is used for acquiring the depth of the screw pump entering the working fluid level.
A seventh obtaining unit, configured to, if the dynamic liquid level depth of the heavy oil well is smaller than the depth of the screw pump lowered into the heavy oil well, take the dynamic liquid level depth of the heavy oil well as the target dynamic liquid level depth of the heavy oil well; and if the working fluid level depth of the heavy oil well is greater than the depth of the screw pump in the heavy oil well, taking the sum of the depth of the screw pump in the heavy oil well and the depth of the screw pump in the working fluid level as the target working fluid level depth of the heavy oil well.
Optionally, the seventh obtaining unit is configured to obtain the target working fluid level depth of the heavy oil well according to the following formula by testing the volume of the container, the annular volume of the oil jacket above the working fluid level, the inner diameter of the casing, the outer diameter of the oil pipe, the depth of the screw pump entering the heavy oil well, and the depth of the screw pump entering the working fluid level:
H＝H1+H2；
wherein, V1Is the volume of the test vessel, V2Is the annular volume of the oil jacket above the working fluid level, D1Is the inner diameter of the casing, D2Is the outer diameter of the oil pipe, pi is a constant, H1The depth of the screw pump in the heavy oil well, H2The depth of the screw pump entering the working fluid level is H, and the depth of the target working fluid level of the heavy oil well is H.
The device provided by the embodiment of the application has the following beneficial effects:
the viscous oil well working fluid level obtained by the method provided by the embodiment of the application overcomes the problems that field technicians manually interpret the error by using conventional sound wave tests, can not interpret the position of the working fluid level, and can not measure the working fluid level or the working fluid level. And the device provided by the embodiment of the application is used for carrying out actual operation, and is applied on site in more than 10 wells, the success rate is 90%, a large amount of manual testing workload is saved, and guidance is provided for daily management of the screw pump well. The methods provided herein are further described below by way of optional examples:
example 1: step 1, obtaining the inner diameter of a casing of a heavy oil well; obtaining the outer diameter of an oil pipe, and establishing a model:
if H < H1Then H ═ H3；P0×V1-P2×V1＝P3×V2-P1×V2
In the formula: v2 is the annular volume of the oil casing above the working fluid level, pi is a constant, D1 is the inner diameter of the casing, D2 is the outer diameter of the oil pipe, H is the working fluid level depth of the heavy oil well, P is the inner diameter of the casing, and0is the initial pressure of the test vessel; p1Pressure when the oil jacket annulus is filled with gas; p2After the oil sleeve annulus is filled with gas, the residual pressure of the container is tested after the gas is continuously filled into the oil sleeve annulus; p3After the oil sleeve annulus is filled with gas, the pressure of the oil sleeve annulus is continuously filled with the gas; v1Is the volume of the test container; v2The annular volume of the oil sleeve above the working fluid level; and pi is a constant.
If H > H1Then H ═ H1+H2；P0×V1-P2×V1＝P3×V2-P1×V2
In the formula: v2 is the annular volume of the oil casing above the working fluid level, pi is a constant, D1 is the inner diameter of the casing, D2 is the outer diameter of the oil pipe, H is the working fluid level depth of the heavy oil well, P is the inner diameter of the casing, and0is the initial pressure of the test vessel; p1The first pressure; p2Is the residual pressure; p3The second pressure; v1Is the volume of the test container; v2The annular volume of the oil sleeve above the working fluid level; and pi is a constant. H1The depth of the screw pump in the heavy oil well, H2The depth of the screw pump entering the working fluid level is H, and the depth of the target working fluid level of the heavy oil well is H.
Step 2, carrying out pressure test on the 1-port heavy oil well for 6 times to obtain P0、P1、P2、P3(ii) a And the casing inside diameter D1 and tubing outside diameter D2 were determined as shown in table 1.
TABLE 1
And 3, calculating the working fluid level of the heavy oil well according to the data in the table 1 through a formula I.
P0×V1-P2×V1＝P3×V2-P1×V2①
The calculation results are shown in table 2:
TABLE 2
| Serial number | V1 | V2 | H |
| 1 | 6 | 4.928875 | 165 |
| 2 | 6 | 4.922973 | 166 |
| 3 | 6 | 4.970195 | 158 |
| 4 | 6 | 4.828527 | 182 |
| 5 | 6 | 4.911167 | 168 |
| 6 | 6 | 4.799013 | 187 |
And 4, checking the result. Comparing the result with the pump-down depth of the oil well, and averaging H
Less than the pump depth H of the well11000m, the actual working fluid level measured by the well
Example 2: the method adopted in the examples of the application is applied by taking the example of Zeze 70-15X.
Taking a 70-15X well as an example, a screw pump is adopted for production, the pump-down depth is 1000m, the production parameters of the oil well are adjusted within 3 months and 1 day in 2019, the rotating speed is adjusted from 80r/min to 60r/min, and in order to ensure the normal production of the oil well, according to the dynamic liquid level testing method of the heavy oil well provided by the embodiment of the application, the dynamic liquid level of the oil well is measured to be 314.6m and is smaller than the pump depth of the oil well, and the oil well can normally produce. The working fluid level of the irrigation test by adopting the sleeve is 310m, and the error is 1.5 percent.
Therefore, the working fluid level obtained by the method provided by the embodiment of the application has high accuracy, and the problems that field technicians manually interpret the error by using conventional sound wave tests, cannot interpret the position of the fluid level and cannot measure the working fluid level or cannot measure the working fluid level are solved.
The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The method for acquiring the dynamic fluid depth of the heavy oil well is characterized by comprising the following steps of:
acquiring the annular volume of the oil sleeve above the working fluid level;
acquiring the inner diameter of the sleeve;
acquiring the outer diameter of an oil pipe;
and obtaining the working fluid level depth of the heavy oil well through the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve and the outer diameter of the oil pipe.
2. The method for acquiring the working fluid level depth of the heavy oil well according to claim 1, wherein the obtaining the working fluid level depth of the heavy oil well from the oil jacket annular volume above the working fluid level, the casing inner diameter, and the tubing outer diameter comprises: and obtaining the working fluid level depth of the heavy oil well according to the following formula by the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve and the outer diameter of the oil pipe:
wherein, V2Is the annular volume of the oil sleeve above the working fluid level, pi is a constant, D1Is the inner diameter of the casing, D2The outer diameter of the oil pipe is H, and the working fluid level depth of the heavy oil well is H.
3. The method for acquiring the working fluid level depth of the heavy oil well according to claim 1, wherein the acquiring of the annular volume of the oil jacket above the working fluid level comprises:
acquiring an initial pressure of the test container;
acquiring the volume of the test container;
filling gas into the oil sleeve annulus for the first time through the test container, so that the gas in the oil sleeve annulus reaches micro-positive pressure, and obtaining first pressure when the oil sleeve annulus is filled with the gas for the first time;
obtaining the residual pressure of the test container after the oil sleeve annulus is filled with gas for the first time;
filling gas into the oil sleeve annulus for the second time through the test container, so that the pressure in the oil sleeve annulus is greater than the first pressure, and obtaining a second pressure when the oil sleeve annulus is filled with the gas for the second time;
and obtaining the annular volume of the oil sleeve above the working fluid level according to the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure and the second pressure.
4. The method for obtaining the working fluid level depth of the heavy oil well according to claim 3, wherein the obtaining the annular volume of the oil jacket above the working fluid level according to the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure and the second pressure comprises: obtaining the annular volume of the oil sleeve above the working fluid level according to the following formula by using the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure and the second pressure:
wherein, P0Is the initial pressure of the test vessel; p1The first pressure; p2Is the residual pressure; p3Is the second pressure, V1Is the volume of the test vessel, V2The annular volume of the oil sleeve above the working fluid level is represented by pi which is a constant.
5. The method for acquiring the working fluid level depth of the heavy oil well according to claim 1, wherein after the working fluid level depth of the heavy oil well is obtained by the oil jacket annular volume above the working fluid level, the casing inner diameter, and the tubing outer diameter, the method further comprises:
acquiring the depth of a screw pump in a heavy oil well;
acquiring the depth of the screw pump entering the working fluid level;
if the dynamic liquid level of the heavy oil well is smaller than the depth of the screw pump in the heavy oil well, taking the dynamic liquid level depth of the heavy oil well as the target dynamic liquid level depth of the heavy oil well;
and if the dynamic liquid level of the heavy oil well is greater than the depth of the screw pump in the heavy oil well, taking the sum of the depth of the screw pump in the heavy oil well and the depth of the screw pump in the dynamic liquid level as the target dynamic liquid level depth of the heavy oil well.
6. The method for acquiring the working fluid level depth of the heavy oil well according to claim 5, wherein the setting the sum of the depth of the screw pump lowered into the heavy oil well and the depth of the screw pump lowered working fluid level as the target working fluid level depth of the heavy oil well, if the working fluid level of the heavy oil well is greater than the depth of the screw pump lowered into the heavy oil well, comprises: and obtaining the target working fluid level depth of the heavy oil well according to the following formula by using the volume of the test container, the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve, the outer diameter of the oil pipe, the depth of the screw pump in the heavy oil well and the depth of the screw pump in the working fluid level:
H＝H1+H2；
wherein H1The depth of the screw pump in the heavy oil well, H2The depth of the screw pump entering the working fluid level is H, and the depth of the target working fluid level of the heavy oil well is H.
7. An apparatus for obtaining a working fluid level depth of a heavy oil well, the apparatus comprising:
the first acquisition unit is used for acquiring the annular volume of the oil sleeve above the working fluid level;
the second acquisition unit is used for acquiring the inner diameter of the sleeve;
the third obtaining unit is used for obtaining the outer diameter of the oil pipe;
and the fourth acquisition unit is used for acquiring the working fluid level depth of the heavy oil well through the annular volume of the oil sleeve above the working fluid level, the inner diameter of the sleeve and the outer diameter of the oil pipe.
8. The thick oil well working fluid level depth acquisition apparatus according to claim 7, wherein the fourth acquisition unit is configured to obtain the thick oil well working fluid level depth from the oil jacket annular volume above the working fluid level, the casing inner diameter, the tubing outer diameter, and the thick oil well working fluid level according to the following formula:
wherein, V2Is the annular volume of the oil sleeve above the working fluid level, pi is a constant, D1Is the inner diameter of the casing, D2The outer diameter of the oil pipe is H, and the working fluid level depth of the heavy oil well is H.
9. The thick oil well working fluid level depth acquisition apparatus according to claim 7, wherein the first acquisition unit includes:
a first acquiring subunit, configured to acquire an initial pressure of the test container;
a second acquiring subunit that acquires a volume of the test container;
the third acquiring subunit is used for filling gas into the oil sleeve annulus for the first time through the test container to acquire first pressure when the oil sleeve annulus is filled with the gas for the first time;
the fourth acquiring subunit is used for acquiring the residual pressure of the test container after the oil sleeve annulus is filled with gas for the first time;
the fifth acquiring subunit is used for acquiring a second pressure when the oil sleeve annulus is inflated with gas for the second time;
and the sixth obtaining subunit is configured to obtain an oil jacket annular volume above the working fluid level according to the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure, and the second pressure.
10. The thick oil well working fluid level depth obtaining apparatus according to claim 9, wherein the fifth obtaining subunit is configured to obtain the oil jacket annular volume above the working fluid level from the initial pressure of the test container, the volume of the test container, the first pressure, the residual pressure, and the second pressure according to the following formula:
wherein, P0Is the initial pressure of the test vessel; p1The first pressure; p2Is the residual pressure; p3The second pressure; v1Is the volume of the test vessel; v2The annular volume of the oil sleeve above the working fluid level; and pi is a constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460869.XA CN113738346A (en) | 2020-05-27 | 2020-05-27 | Method and device for acquiring working fluid level depth of heavy oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460869.XA CN113738346A (en) | 2020-05-27 | 2020-05-27 | Method and device for acquiring working fluid level depth of heavy oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113738346A true CN113738346A (en) | 2021-12-03 |
Family
ID=78723728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010460869.XA Pending CN113738346A (en) | 2020-05-27 | 2020-05-27 | Method and device for acquiring working fluid level depth of heavy oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738346A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080536A (en) * | 2010-12-03 | 2011-06-01 | 中国石油天然气股份有限公司 | Test method and device of working fluid level of oil well |
| CN105089591A (en) * | 2015-06-19 | 2015-11-25 | 中国石油天然气股份有限公司 | Method for determining annular gas-liquid interface of steam injection well |
| CN105484733A (en) * | 2015-12-14 | 2016-04-13 | 中国石油天然气股份有限公司 | Method and device for testing depth of gas-liquid interface |
| 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 |
-
2020
- 2020-05-27 CN CN202010460869.XA patent/CN113738346A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080536A (en) * | 2010-12-03 | 2011-06-01 | 中国石油天然气股份有限公司 | Test method and device of working fluid level of oil well |
| CN105089591A (en) * | 2015-06-19 | 2015-11-25 | 中国石油天然气股份有限公司 | Method for determining annular gas-liquid interface of steam injection well |
| CN105484733A (en) * | 2015-12-14 | 2016-04-13 | 中国石油天然气股份有限公司 | Method and device for testing depth of gas-liquid interface |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9476742B2 (en) | System, method, and computer readable medium for calculating well flow rates produced with electrical submersible pumps | |
| CN111307690B (en) | Packing performance testing device and method for annular cement ring of oil-gas well cylinder | |
| CN108691536B (en) | Horizontal effective ground stress testing method and device | |
| US20020066308A1 (en) | Borehole testing system | |
| RU111190U1 (en) | OIL PRODUCING WELL WITH ARTIFICIAL INTELLIGENCE | |
| CN103926184A (en) | Detection method for gas logging porosity of core and detection device thereof | |
| CN105089591A (en) | Method for determining annular gas-liquid interface of steam injection well | |
| CN107939378B (en) | Method for acquiring working fluid level of ground drive screw pump well in real time | |
| CN109184661B (en) | Monitoring method and system for identifying high-yield liquid position of bottom water reservoir horizontal well | |
| CN105257281A (en) | Method for detecting casing leakage | |
| CN202789517U (en) | Oil-producing control device of screw pump on basis of underground multi-parameter real-time monitoring | |
| CN113738346A (en) | Method and device for acquiring working fluid level depth of heavy oil well | |
| WO2016180785A1 (en) | Measuring device | |
| CN105136406A (en) | High-temperature pressure testing device for downwell tool and pressure testing method thereof | |
| CN111088977B (en) | Experimental device and experimental method for well cementation annular pressurization | |
| CN111963154A (en) | Casing damage oil well leakage point identification method | |
| CN217877897U (en) | Geothermal well liquid level measuring structure | |
| CN109682738B (en) | Surveying device and surveying method for mineral resource permeability | |
| CN204312059U (en) | Oil field welldrilling drill bit sniffer | |
| CN105445270A (en) | Apparatus for monitoring fluid phase behavior changes in porous medium | |
| MXPA03007913A (en) | Method for measuring formation properties with a time-limited formation test. | |
| CN207406334U (en) | Capillary pressure measuring device | |
| CN113607620A (en) | Supercritical carbon dioxide fracturing and permeability testing integrated experimental device and method | |
| CN109459371B (en) | Rock material gas permeability testing device and testing method thereof | |
| CN106837309A (en) | A kind of method based on the vertical buckling inverting well enlarging rate of gas drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |