CN113445967A - Throttling method and device for two-stage oil nozzle - Google Patents
Throttling method and device for two-stage oil nozzle Download PDFInfo
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- CN113445967A CN113445967A CN202010213137.0A CN202010213137A CN113445967A CN 113445967 A CN113445967 A CN 113445967A CN 202010213137 A CN202010213137 A CN 202010213137A CN 113445967 A CN113445967 A CN 113445967A
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The embodiment of the invention provides a throttling method and a throttling device of a secondary oil nozzle, which are applied to a secondary oil nozzle, wherein the secondary oil nozzle comprises a first-stage oil nozzle and a second-stage oil nozzle arranged below the first-stage oil nozzle, when the flow is distributed to the first-stage oil nozzle and the second-stage oil nozzle in the secondary oil nozzle, the first current state of the first-stage oil nozzle and the second current state of the second-stage oil nozzle are respectively determined, and the flow is distributed to the first-stage oil nozzle and the second-stage oil nozzle in the secondary oil nozzle according to the first current state of the first-stage oil nozzle and the second current state of the second-stage oil nozzle, so that the throttling of the secondary oil nozzle is realized.
Description
Technical Field
The invention relates to the technical field of gas production of oil and gas fields, in particular to a throttling method and a throttling device for a secondary oil nozzle.
Background
The underground throttling process technology has been widely and successfully applied in Liaohe, Sichuan, Changqing, North China and Daqing. The Tarim oil field successfully applies the underground throttling technology to a DH12 well for the first time in 26 months 6 and 2011. By the end of 2019, 8 months, 22 wells have been performed cumulatively. In the application of the downhole throttling technology to the Tarim oil field, a 'safe' nozzle tip is often installed on the ground Christmas tree. In this way, a secondary restriction of the nozzle tip is created.
In the prior art, when a secondary nozzle tip is adopted, no relevant research is carried out on how to throttle the secondary nozzle tip, so that how to throttle the secondary nozzle tip is a problem to be solved urgently by technical personnel in the field
Disclosure of Invention
The embodiment of the invention provides a throttling method and a throttling device of a secondary oil nozzle.
In a first aspect, an embodiment of the present invention provides a throttling method for a secondary nozzle tip, where the throttling method is applied to a secondary nozzle tip, where the secondary nozzle tip includes a first-stage nozzle tip and a second-stage nozzle tip disposed below the first-stage nozzle tip, and the method may include:
respectively determining a first current state of the first-stage oil nozzle and a second current state of the second-stage oil nozzle; wherein the current state is a critical state or a subcritical state;
and distributing flow for the first-stage oil nozzle and the second-stage oil nozzle according to the first current state and the second current state.
Optionally, obtaining the current iteration number of the first oil nozzle; the current iteration times are times of a process of determining the current state of a first oil nozzle, and the first oil nozzle is any one of the first-stage oil nozzle and the second-stage oil nozzle;
and determining the current state of the first oil nozzle according to the current iteration times of the first oil nozzle.
Optionally, if the current iteration number is greater than or equal to a first threshold, determining that the current state of the first oil nozzle is a critical state;
if the current iteration number is smaller than a first threshold value, acquiring the mass critical flow of the first oil nozzle; and determining the current state of the first oil nozzle according to the mass critical flow of the first oil nozzle.
Optionally, if the mass critical flow of the first nozzle tip is greater than or equal to the mass flow of the well, determining that the current state of the first nozzle tip is a subcritical state;
and if the mass critical flow of the first oil nozzle is smaller than the mass flow of the well, determining that the current state of the first oil nozzle is a critical state.
Optionally, respectively determining wellhead back pressure and the pressure behind the second-stage choke;
and if the absolute value of the difference value between the post-nozzle pressure of the second-stage nozzle tip and the wellhead back pressure is smaller than a second threshold value, determining that the second current state is the current state of the second-stage nozzle tip.
Optionally, if the absolute value of the difference between the post-nozzle pressure of the second-stage choke and the wellhead back pressure is greater than or equal to a second threshold, adjusting the flow rate of the well or adjusting the additional pressure drop of the first-stage choke according to the first current state of the first-stage choke.
Optionally, if the pressure behind the nozzle of the second-stage choke is greater than the wellhead back pressure, and the first current state is a subcritical state, increasing the flow rate of the well; if the pressure behind the nozzle of the second-stage nozzle tip is greater than the return pressure of the wellhead and the first current state is a critical state, increasing the additional pressure drop of the first-stage nozzle tip;
if the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a subcritical state, reducing the flow of the well; and if the pressure behind the nozzle of the second-stage nozzle tip is smaller than the return pressure of the well mouth and the first current state is a critical state, reducing the additional pressure drop of the first-stage nozzle tip.
Optionally, calculating a wellbore pressure drop from the multiphase flow relationship; wherein the multiphase flow relationship is used to indicate a relationship between oil, gas, and water;
and determining the pressure after the nozzle of the second-stage nozzle according to the pressure drop of the well bore.
In a second aspect, an embodiment of the present invention provides a throttling device for a secondary oil nozzle, which is applied to a secondary oil nozzle, where the secondary oil nozzle includes a first-stage oil nozzle and a second-stage oil nozzle disposed below the first-stage oil nozzle, and the device includes:
the determining module is used for respectively determining a first current state of the first-stage oil nozzle and a second current state of the second-stage oil nozzle; wherein the current state is a critical state or a subcritical state;
and the distribution module is used for distributing flow for the first-stage oil nozzle and the second-stage oil nozzle according to the first current state and the second current state.
Optionally, the determining module is specifically configured to obtain a current iteration number of the first nozzle tip; the current iteration times are times of a process of determining the current state of a first oil nozzle, and the first oil nozzle is any one of the first-stage oil nozzle and the second-stage oil nozzle; and determining the current state of the first oil nozzle according to the current iteration times of the first oil nozzle.
Optionally, the determining module is specifically configured to determine that the current state of the first nozzle tip is a critical state if the current iteration number is greater than or equal to a first threshold; if the current iteration number is smaller than a first threshold value, acquiring the mass critical flow of the first oil nozzle; and determining the current state of the first oil nozzle according to the mass critical flow of the first oil nozzle.
Optionally, the determining module is specifically configured to determine that the current state of the first nozzle tip is a subcritical state if the mass critical flow of the first nozzle tip is greater than or equal to the mass flow of the well; and if the mass critical flow of the first oil nozzle is smaller than the mass flow of the well, determining that the current state of the first oil nozzle is a critical state.
Optionally, the apparatus further comprises a processing module: the processing module is used for respectively determining wellhead back pressure and the pressure behind the second-stage oil nozzle; and if the absolute value of the difference value between the post-nozzle pressure of the second-stage nozzle tip and the wellhead back pressure is smaller than a second threshold value, determining that the second current state is the current state of the second-stage nozzle tip.
Optionally, the processing module is further configured to adjust a flow rate of the well or adjust an additional pressure drop of the first-stage choke according to a first current state of the first-stage choke if an absolute value of a difference between a post-choke pressure of the second-stage choke and a wellhead back pressure is greater than or equal to a second threshold.
Optionally, the processing module is specifically configured to increase a flow rate of the well if the post-nozzle pressure of the second stage choke is greater than a wellhead back pressure, and the first current state is a subcritical state; if the pressure behind the nozzle of the second-stage nozzle tip is greater than the return pressure of the wellhead and the first current state is a critical state, increasing the additional pressure drop of the first-stage nozzle tip; if the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a subcritical state, reducing the flow of the well; and if the pressure behind the nozzle of the second-stage nozzle tip is smaller than the return pressure of the well mouth and the first current state is a critical state, reducing the additional pressure drop of the first-stage nozzle tip.
Optionally, the processing module is specifically configured to calculate a wellbore pressure drop according to a multiphase flow relationship; wherein the multiphase flow relationship is indicative of a relationship between oil, gas, and water in a wellbore; and determining the pressure after the nozzle of the second-stage nozzle according to the pressure drop of the well bore.
The embodiment of the invention provides a throttling method and a throttling device of a secondary oil nozzle, which are applied to a secondary oil nozzle, wherein the secondary oil nozzle comprises a first-stage oil nozzle and a second-stage oil nozzle arranged below the first-stage oil nozzle, when the flow is distributed to the first-stage oil nozzle and the second-stage oil nozzle in the secondary oil nozzle, the first current state of the first-stage oil nozzle and the second current state of the second-stage oil nozzle are respectively determined, and the flow is distributed to the first-stage oil nozzle and the second-stage oil nozzle in the secondary oil nozzle according to the first current state of the first-stage oil nozzle and the second current state of the second-stage oil nozzle, so that the throttling of the secondary oil nozzle is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic flow chart of a throttling method for a two-stage choke provided in an embodiment of the present application;
FIG. 2 is a schematic flow chart illustrating another method for throttling a secondary nozzle tip according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a throttling device of a two-stage nozzle tip according to an embodiment of the present invention;
FIG. 4 is a schematic view of another two-stage nozzle tip throttling arrangement according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the present invention, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The throttling method of the secondary nozzle tip provided by the embodiment can be applied to the secondary nozzle tip, and in the application practice of the underground throttling technology in a Tarim oil field, in order to prevent the impact of the failure of the underground nozzle tip on a ground system, a 'safe' nozzle tip is often installed on a ground Christmas tree. In this way, a two-stage throttling of the oil nozzle is formed, but at present, no research on the throttling of the two-stage oil nozzle exists, and the embodiment of the invention provides a throttling method of the two-stage oil nozzle. When the throttling of the secondary oil nozzle is carried out, the flow of the primary oil nozzle and the flow of the secondary oil nozzle are distributed according to the respective states of the primary oil nozzle and the secondary oil nozzle by respectively calculating the respective states of the primary oil nozzle and the secondary oil nozzle, so that the throttling of the secondary oil nozzle is realized.
The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a throttling method of a secondary nozzle tip according to an embodiment of the present application, and as shown in fig. 1, the throttling method of the secondary nozzle tip is applied to a secondary nozzle tip, where the secondary nozzle tip includes a first-stage nozzle tip and a second-stage nozzle tip disposed below the first-stage nozzle tip, for example, referring to fig. 1, the throttling method of the secondary nozzle tip may include:
s101, respectively determining a first current state of a first-stage oil nozzle and a second current state of a second-stage oil nozzle.
Wherein the current state is a critical state or a subcritical state.
It should be noted that the combination of the first current state of the first stage nozzle tip and the second current state of the second stage nozzle tip may have the following four states: the first-stage nozzle tip is in a critical state and the second-stage nozzle tip is in a subcritical state; the first-stage nozzle tip is in a subcritical state and the second-stage nozzle tip is in a critical state; the first-stage oil nozzle and the second-stage oil nozzle are in critical states; the first stage nozzle tip and the second stage nozzle tip are both in subcritical state.
It should be noted that, in the embodiment of the present invention, when determining the first current state of the first-stage nozzle tip and the second current state of the second-stage nozzle tip, respectively, the determination method of the first current state of the first-stage nozzle tip and the determination method of the second current state of the second-stage nozzle tip are similar, and therefore, for convenience of description, how to determine the first current state of the first-stage nozzle tip and the second current state of the second-stage nozzle tip may be described by taking any one of the first-stage nozzle tip and the second-stage nozzle tip, for example, the first nozzle tip as an example.
For example, when determining the current state of the first nozzle tip, the current iteration number of the first nozzle tip may be obtained first; and determining the current state of the first oil nozzle according to the current iteration times of the first oil nozzle. If the current iteration times are larger than or equal to a first threshold value, determining that the current state of the first oil nozzle is a critical state; if the current iteration number is smaller than a first threshold value, acquiring the mass critical flow of the first oil nozzle; and determining the current state of the first nozzle tip according to the mass critical flow of the first nozzle tip. And the current iteration times are the times of the process of determining the current state of the first oil nozzle.
The mass critical flow of the first nozzle tip is the maximum mass flow passing through the first nozzle tip.
It should be noted that the first threshold may be set according to actual needs. For example, in the embodiment of the present application, the first threshold may be 30, and here, the embodiment of the present application is only described by taking the first threshold may be 30 as an example, but it does not mean that the embodiment of the present application is limited thereto. For example: when the current state of the first oil nozzle is determined according to the current iteration times of the first oil nozzle, comparing whether the current iteration times of the first oil nozzle exceeds 30, and if the current iteration times is greater than or equal to 30, determining that the current state of the first oil nozzle is a critical state; if the current iteration number is less than 30, acquiring the mass critical flow of the first oil nozzle; and determining the current state of the first nozzle tip according to the mass critical flow of the first nozzle tip. And the current iteration times are the times of the process of determining the current state of the first oil nozzle.
For example, when the current state of the first nozzle tip is determined according to the mass critical flow of the first nozzle tip, if the mass critical flow of the first nozzle tip is greater than or equal to the mass flow of the well, the current state of the first nozzle tip is determined to be a subcritical state; and if the mass critical flow of the first oil nozzle is smaller than the mass flow of the well, determining that the current state of the first oil nozzle is a critical state.
It should be noted that, after the state of the first nozzle tip is determined by the above method, the state of the other nozzle tip excluding the first nozzle tip from the two-stage nozzle tips needs to be determined, and the method of determining the state of the other nozzle tip excluding the first nozzle tip from the two-stage nozzle tips is similar to the above method of determining the state of the first nozzle tip.
After determining the first current state of the first stage nozzle tip and the second current state of the second stage nozzle tip, respectively, the following S102 may be performed for allocating the flow rates to the first stage nozzle tip and the second stage nozzle tip according to the first current state and the second current state:
and S102, distributing flow to the first-stage oil nozzle and the second-stage oil nozzle according to the first current state and the second current state.
For example, when the flow rates are allocated to the first stage nozzle tip and the second stage nozzle tip according to the first current state and the second current state, the flow rates may be allocated to the first stage nozzle tip and the second stage nozzle tip with reference to table 1 obtained from the historical data.
TABLE 1 sensitivity analysis data table with the same size of front and rear oil nozzles
As can be seen from table 1, when the size of the first stage nozzle tip is the same as that of the second stage nozzle tip, the first stage nozzle tip is only in a subcritical state, and the second stage nozzle tip may be in a critical state or a subcritical state; if the first-stage oil nozzle and the second-stage oil nozzle are in subcritical states, the throttling pressure drop can be distributed more evenly, otherwise, the distribution is extremely unbalanced; and the after-mouth temperature of the second stage can be kept constant when the after-mouth pressure of the second stage nozzle tip is constant.
It can also be seen from table 1 that when the sizes of the front and rear secondary nozzles are close, the throttling pressure drop can be distributed on the first-stage nozzle and the second-stage nozzle relatively uniformly, and when the pressure behind the second-stage nozzle is constant, the temperature behind the second-stage nozzle can be kept constant, i.e. the outflow temperature is also kept constant.
It will be appreciated that the combination of different sized nozzles has in common: although the sizes of the two-stage oil nozzles are different, the temperature of the wellhead can be kept constant when the wellhead back pressure is fixed.
It should be noted that to achieve a more balanced distribution of the throttling pressure drop over the first stage nozzle tip and the second stage nozzle tip, 2 conditions need to be satisfied: the sizes of the first-stage oil nozzle and the second-stage oil nozzle are close; the first stage nozzle tip and the second stage nozzle tip are both in a subcritical state. In the throttling of the secondary nozzle tip, the critical primary nozzle tip bears most of the pressure drop, and the throttling device of the secondary nozzle tip is influenced to adjust the flow.
Therefore, according to the throttling method of the secondary nozzle tip provided by the embodiment of the invention, when the flow rate is distributed to the first-stage nozzle tip and the second-stage nozzle tip in the secondary nozzle tip, the first current state of the first-stage nozzle tip and the second current state of the second-stage nozzle tip are respectively determined, and the flow rate is distributed to the first-stage nozzle tip and the second-stage nozzle tip in the secondary nozzle tip according to the first current state of the first-stage nozzle tip and the second current state of the second-stage nozzle tip, so that the throttling of the secondary nozzle tip is realized.
Based on the embodiment shown in fig. 1, when the second current state of the oil nozzle is the subcritical state, it may further be determined whether the determined second current state of the second stage oil nozzle is accurate, which may be specifically referred to the description in the following second embodiment.
Fig. 2 is a schematic flow chart of another throttling method for a secondary nozzle tip according to an embodiment of the present application, for example, please refer to fig. 2, where the throttling method for the secondary nozzle tip may further include:
s201, respectively determining wellhead back pressure and the pressure behind the second-stage oil nozzle.
It should be noted that the wellhead back pressure is the resistance of the down-flow pipeline to the wellhead oil flow, and this resistance is the back pressure and is obtained by a pressure gauge for measuring the back pressure. And a pressure gauge for measuring back pressure is arranged on an oil well oil transportation main line. The connection is located near the Christmas tree nozzle. Wellhead back pressure reflects the resistance to flow in the surface line from the well to the metering station. If the measured back pressure is high, the oil viscosity is high or the wax is precipitated and attached to the pipe wall because the wax content in the oil is high, and the oil flow is blocked.
For example, when determining the after-mouth pressure of the second stage nozzle tip, the wellbore pressure drop may be calculated according to the multiphase flow relationship, and then the after-mouth pressure of the second stage nozzle tip may be determined according to the wellbore pressure drop. Wherein the multiphase flow relationship is indicative of a relationship between oil, gas, and water in the wellbore.
And verifying and determining whether the second current state of the second-stage choke is correct or not by comparing the magnitude relation between the wellhead back pressure and the choke back pressure of the second-stage choke, and determining how to adjust the flow or the pressure drop so as to more uniformly distribute the flow to the first-stage choke and the second-stage choke.
S202, if the absolute value of the difference value between the post-nozzle pressure of the second-stage oil nozzle and the wellhead back pressure is smaller than a second threshold value, determining that the second current state is the current state of the second-stage oil nozzle.
The second threshold may be specifically set according to actual needs, and herein, the embodiment of the present application is not specifically limited.
It should be noted that, if the absolute value of the difference between the post-nozzle pressure of the second-stage nozzle tip and the wellhead back pressure is smaller than the second threshold, it is determined that the second current state of the second nozzle tip is a subcritical state, and the second current state is the current state of the second-stage nozzle tip, at this time, if the first state of the first-stage nozzle tip is also a subcritical state, the throttling pressure drop can be more evenly distributed on the first-stage nozzle tip and the second-stage nozzle tip, so that the throttling of the second-stage nozzle tip is realized.
Conversely, if the absolute value of the difference between the post-nozzle pressure of the second stage choke and the wellhead back pressure is greater than or equal to the second threshold, the flow rate of the well or the additional pressure drop of the first stage choke is adjusted according to the first current state of the first stage choke.
It should be noted that, if the absolute value of the difference between the post-nozzle pressure of the second stage nozzle and the wellhead back pressure is greater than or equal to the second threshold, it is indicated that the second current state of the second stage nozzle is not the current state of the second stage nozzle, that is, the second stage nozzle does not reach the subcritical state, the flow of the well needs to be adjusted or the additional pressure drop of the nozzle needs to be adjusted so that the state of the nozzle reaches the subcritical state, so that the flow is relatively evenly distributed to the two stages of nozzles, and the magnitude of the post-nozzle pressure of the second stage nozzle and the wellhead back pressure is compared to determine how to adjust the flow of the well or the additional pressure drop of the nozzle.
For example, if the post-nozzle pressure of the second stage nozzle tip is greater than the wellhead back pressure and the first current state is a subcritical state, the flow rate of the well is increased; and if the nozzle back pressure of the second-stage choke is greater than the wellhead back pressure and the first current state is a critical state, increasing the additional pressure drop of the first-stage choke.
If the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a subcritical state, reducing the flow of the well; and if the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a critical state, reducing the additional pressure drop of the first-stage oil nozzle.
Therefore, in the embodiment of the invention, the wellhead back pressure and the pressure behind the second-stage choke are respectively determined; if the absolute value of the difference value between the post-nozzle pressure of the second-stage nozzle tip and the wellhead back pressure is smaller than a second threshold value, determining that a second current state is the current state of the second-stage nozzle tip; if the absolute value of the difference between the post-nozzle pressure of the second-stage choke and the wellhead back pressure is greater than or equal to a second threshold value, adjusting the flow of the well or adjusting the extra pressure drop of the first-stage choke according to the first current state of the first-stage choke; if the pressure behind the nozzle of the second-stage oil nozzle is greater than the return pressure of the well mouth and the first current state is a subcritical state, increasing the flow of the well; if the pressure behind the nozzle of the second-stage oil nozzle is greater than the return pressure of the well mouth and the first current state is a critical state, increasing the additional pressure drop of the first-stage oil nozzle; if the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a subcritical state, reducing the flow of the well; and if the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a critical state, reducing the additional pressure drop of the first-stage oil nozzle. Whether the second current state is the subcritical state or not can be determined by judging whether the difference value between the pressure behind the nozzle and the return pressure of the wellhead is within an error range or not, so that whether the flow or the volume of the well is regulated is determined to be pressure drop or not, the second current state is the subcritical state, and therefore when the first current state is the subcritical state, the throttling pressure drop can be distributed to the first-stage oil nozzle and the second-stage oil nozzle in a balanced mode, and throttling of the second-stage oil nozzle is achieved.
Fig. 3 is a schematic view of a throttling device of a two-stage nozzle tip according to an embodiment of the present invention, and as shown in fig. 3, a throttling device 30 of a two-stage nozzle tip according to an embodiment of the present invention includes: a determination module 301 and an allocation module 302.
The determining module 301 is configured to determine a first current state of the first-stage nozzle tip and a second current state of the second-stage nozzle tip respectively; wherein the current state is a critical state or a subcritical state.
The distribution module 302 is configured to distribute flow rates to the first-stage nozzle tip and the second-stage nozzle tip according to the first current state and the second current state.
Optionally, the determining module 301 is specifically configured to obtain a current iteration number of the first nozzle tip; the current iteration times are times of a process of determining the current state of a first oil nozzle, and the first oil nozzle is any one of a first-stage oil nozzle and a second-stage oil nozzle; and determining the current state of the first oil nozzle according to the current iteration times of the first oil nozzle.
Optionally, the determining module 301 is specifically configured to determine that the current state of the first nozzle tip is a critical state if the current iteration number is greater than or equal to a first threshold; if the current iteration number is smaller than a first threshold value, acquiring the mass critical flow of the first oil nozzle; and determining the current state of the first nozzle tip according to the mass critical flow of the first nozzle tip.
Optionally, the determining module 301 is specifically configured to determine that the current state of the first nozzle tip is a subcritical state if the mass critical flow of the first nozzle tip is greater than or equal to the mass flow of the well; and if the mass critical flow of the first oil nozzle is smaller than the mass flow of the well, determining that the current state of the first oil nozzle is a critical state.
Optionally, fig. 4 is a schematic view of another throttling device for a secondary nozzle tip according to an embodiment of the present invention, and as shown in fig. 4, the throttling device 30 for a secondary nozzle tip further includes a processing module 303:
optionally, the processing module 303 is configured to determine a wellhead back pressure and a post-nozzle pressure of the second stage nozzle tip, respectively; and if the absolute value of the difference value between the post-nozzle pressure of the second-stage oil nozzle and the wellhead back pressure is smaller than a second threshold value, determining that the second current state is the current state of the second-stage oil nozzle.
The processing module 303 is further configured to adjust the flow rate of the well or adjust an additional pressure drop of the first-stage choke according to a first current state of the first-stage choke if an absolute value of a difference between a post-choke pressure of the second-stage choke and a wellhead back pressure is greater than or equal to a second threshold.
Optionally, the processing module 303 is specifically configured to increase the flow rate of the well if the post-nozzle pressure of the second-stage choke is greater than the wellhead back pressure and the first current state is the subcritical state; if the pressure behind the nozzle of the second-stage oil nozzle is greater than the return pressure of the well mouth and the first current state is a critical state, increasing the additional pressure drop of the first-stage oil nozzle; if the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a subcritical state, reducing the flow of the well; and if the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a critical state, reducing the additional pressure drop of the first-stage oil nozzle.
Optionally, the processing module 303 is specifically configured to calculate a wellbore pressure drop according to the multiphase flow relationship; wherein the multiphase flow relationship is used to indicate the relationship between oil, gas, and water; and determining the pressure behind the nozzle of the second-stage nozzle according to the pressure drop of the shaft.
The throttling device 30 of the secondary oil nozzle according to the embodiment of the present invention may implement the technical solution of the throttling method of the secondary oil nozzle in any one of the embodiments shown in the above drawings, and the implementation principle and the beneficial effects thereof are similar to those of the throttling method of the secondary oil nozzle, and are not described herein again.
Fig. 5 is a schematic structural diagram of a throttling device of a two-stage nozzle tip according to an embodiment of the present invention, and for example, referring to fig. 5, the throttling device 50 of the two-stage nozzle tip may include a memory 501 and a processor 502.
A memory 501 for storing a computer program;
the processor 502 is configured to read the computer program stored in the memory 501, and execute the method for throttling the secondary nozzle according to any of the embodiments described above according to the computer program in the memory 501.
Alternatively, the memory 501 may be separate or integrated with the processor 502. When the memory 501 is a device separate from the processor 502, the electronic apparatus may further include: a bus for connecting the memory 501 and the processor 502.
Optionally, this embodiment further includes: a communication interface that may be coupled to the processor 502 via a bus. The processor 502 may control the communication interface to implement the receiving and transmitting functions of the electronic device described above.
The electronic device 50 shown in the embodiment of the present invention may implement the technical solution of the throttling method for the secondary nozzle tip in any one of the embodiments shown in the above drawings, and the implementation principle and the beneficial effects thereof are similar to those of the throttling method for the secondary nozzle tip, and are not described herein again.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the method for throttling a secondary oil nozzle according to any of the above embodiments is implemented, and an implementation principle and beneficial effects of the method for throttling a secondary oil nozzle are similar to those of the method for throttling a secondary oil nozzle, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present invention are not limited to only one bus or one type of bus.
The computer-readable storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A method of throttling a secondary nozzle tip, the method being applied to a secondary nozzle tip, the secondary nozzle tip comprising a first stage nozzle tip and a second stage nozzle tip disposed below the first stage nozzle tip, the method comprising:
respectively determining a first current state of the first-stage oil nozzle and a second current state of the second-stage oil nozzle; wherein the current state is a critical state or a subcritical state;
and distributing flow for the first-stage oil nozzle and the second-stage oil nozzle according to the first current state and the second current state.
2. The method of claim 1, wherein said separately determining a first current state of said first stage nozzle tip and a second current state of said second stage nozzle tip comprises:
acquiring the current iteration times of the first oil nozzle; the current iteration times are times of a process of determining the current state of a first oil nozzle, and the first oil nozzle is any one of the first-stage oil nozzle and the second-stage oil nozzle;
and determining the current state of the first oil nozzle according to the current iteration times of the first oil nozzle.
3. The method of claim 2, wherein said determining a current state of the first nozzle tip based on a current number of iterations of the first nozzle tip comprises:
if the current iteration times are larger than or equal to a first threshold value, determining that the current state of the first oil nozzle is a critical state;
if the current iteration number is smaller than a first threshold value, acquiring the mass critical flow of the first oil nozzle; and determining the current state of the first oil nozzle according to the mass critical flow of the first oil nozzle.
4. The method of claim 3, wherein said determining a current state of said first nozzle tip based on a mass critical flow of said first nozzle tip comprises:
if the mass critical flow of the first nozzle tip is larger than or equal to the mass flow of the well, determining that the current state of the first nozzle tip is a subcritical state;
and if the mass critical flow of the first oil nozzle is smaller than the mass flow of the well, determining that the current state of the first oil nozzle is a critical state.
5. The method of any of claims 1-4, wherein, if the second current state is a subcritical state, after determining the first current state of the first stage nozzle tip and the second current state of the second stage nozzle tip, respectively, further comprising:
respectively determining wellhead back pressure and the pressure behind the second-stage choke;
and if the absolute value of the difference value between the post-nozzle pressure of the second-stage nozzle tip and the wellhead back pressure is smaller than a second threshold value, determining that the second current state is the current state of the second-stage nozzle tip.
6. The method of claim 5, further comprising:
and if the absolute value of the difference value between the post-nozzle pressure of the second-stage choke and the wellhead back pressure is greater than or equal to a second threshold value, adjusting the flow of the well or adjusting the extra pressure drop of the first-stage choke according to the first current state of the first-stage choke.
7. The method of claim 6, wherein adjusting the flow rate of the well or adjusting the additional pressure drop of the first stage choke based on the first current state of the first stage choke if the absolute value of the difference between the post-choke pressure and the wellhead back pressure of the second stage choke is greater than or equal to a second threshold comprises:
if the pressure behind the nozzle of the second-stage oil nozzle is greater than the return pressure of the well mouth and the first current state is a subcritical state, increasing the flow of the well; if the pressure behind the nozzle of the second-stage nozzle tip is greater than the return pressure of the wellhead and the first current state is a critical state, increasing the additional pressure drop of the first-stage nozzle tip;
if the pressure behind the nozzle of the second-stage oil nozzle is smaller than the return pressure of the well mouth and the first current state is a subcritical state, reducing the flow of the well; and if the pressure behind the nozzle of the second-stage nozzle tip is smaller than the return pressure of the well mouth and the first current state is a critical state, reducing the additional pressure drop of the first-stage nozzle tip.
8. The method of claim 5, wherein determining the after-mouth pressure of the second stage nozzle tip comprises:
calculating the wellbore pressure drop according to the multiphase flow relationship; wherein the multiphase flow relationship is indicative of a relationship between oil, gas, and water in a wellbore;
and determining the pressure after the nozzle of the second-stage nozzle according to the pressure drop of the well bore.
9. The utility model provides a throttling arrangement of second grade glib talker, its characterized in that is applied to the second grade glib talker, the second grade glib talker includes first order glib talker and sets up the second grade glib talker of first order glib talker below, the device includes:
the determining module is used for respectively determining a first current state of the first-stage oil nozzle and a second current state of the second-stage oil nozzle; wherein the current state is a critical state or a subcritical state;
and the distribution module is used for distributing flow for the first-stage oil nozzle and the second-stage oil nozzle according to the first current state and the second current state.
10. The throttling device of the two-stage oil nozzle is characterized by comprising a memory and a processor;
a memory for storing a computer program;
a processor for reading the computer program stored in the memory and executing the method of throttling a secondary nozzle tip according to any one of claims 1 to 8 in accordance with the computer program in the memory.
11. A computer-readable storage medium having computer-executable instructions stored thereon which, when executed by a processor, implement the method of throttling a secondary nozzle as claimed in any one of claims 1 to 8.
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| CN202010213137.0A CN113445967B (en) | 2020-03-24 | 2020-03-24 | Throttling method and device for secondary oil nozzle |
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| CN202010213137.0A CN113445967B (en) | 2020-03-24 | 2020-03-24 | Throttling method and device for secondary oil nozzle |
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