CN111980635A - Magnetic targeting hydrate inhibitor transportation system and method - Google Patents
Magnetic targeting hydrate inhibitor transportation system and method Download PDFInfo
- Publication number
- CN111980635A CN111980635A CN202010962286.7A CN202010962286A CN111980635A CN 111980635 A CN111980635 A CN 111980635A CN 202010962286 A CN202010962286 A CN 202010962286A CN 111980635 A CN111980635 A CN 111980635A
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- underwater
- hydrate inhibitor
- separator
- magnetic
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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
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/40—Separation associated with re-injection of separated materials
Abstract
The invention discloses a magnetic targeting hydrate inhibitor transportation system and a method, which belong to the technical field of flow guarantee of an underwater production system in the development of deepwater oil gas and hydrate resources, can realize the targeted transportation and controllable release of a hydrate inhibitor, and ensure the accurate and efficient control of the hydrate, and comprise a storage tank, an injection pump, a controller, a separator and a recoverer, wherein the storage tank is positioned above the water surface, the storage tank is communicated with the injection pump, the injection pump is communicated with an underwater Christmas tree and provides the magnetic targeting hydrate inhibitor for the underwater Christmas tree, and the injection pump is connected with the controller; the separator is communicated with the subsea production tree, one end of the recoverer is communicated with the separator to obtain liquid in the separator, and the other end of the recoverer is communicated with the storage tank.
Description
Technical Field
The invention belongs to the technical field of flow guarantee of an underwater production system in deepwater oil gas and hydrate resource development, and particularly relates to a magnetic targeting hydrate inhibitor transportation system and a method.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the development of deepwater oil gas and hydrate resources, an underwater production system must effectively deal with the risk of hydrate flow obstacle. Hydrate blockage at any part of the production system can obviously influence the normal operation of the whole production system. Hydrate inhibitor injection is an essential means of hydrate control in production systems. The underwater production system has complex composition and comprises an underwater wellhead, an underwater Christmas tree, a jumper pipe, an umbilical cable, an underwater manifold, a long-distance pipeline and the like. The evolution mechanism of the hydrate flow obstacle at different positions is obviously different. For a throttle valve, the temperature is seriously reduced due to throttling, and the hydrate generation condition is easily met; for a dead leg, the fluid mobility is poor, the temperature is reduced due to serious heat loss, and hydrate generation is induced; for a flowing pipeline, the low-temperature-high-pressure environment in a certain pipeline range caused by temperature accumulation loss caused by long-distance transportation is beneficial to generating the hydrate. The hydrate risk degree of each component is greatly different, and the required effective concentration of the hydrate inhibitor is different.
However, the inventors have found that with existing hydrate control technologies, the delivery of hydrate inhibitors is entirely dependent on multiphase flow systems within the production system. On the one hand, hydrate inhibitors cannot be transported to areas with poor mobility, such as dead legs; on the other hand, the difference in the properties of the hydrate inhibitor and the liquid phase results in the hydrate inhibitor not being transported synchronously with the liquid phase, for example, condensed water exists at the top of the flow pipeline and the inhibitor cannot be condensed synchronously. In the prior art, the transport effect of hydrate inhibitors is poor, and the transport degree of the hydrate inhibitors in an underwater production system is difficult to match with the risk degree of the hydrates.
In order to achieve effective prevention and treatment concentration, a large-dose injection mode is adopted at present, so that the defects of 'integral excess and local deficiency' of injection of hydrate inhibitors are caused. The whole process is excessive, so that the operation and economic cost is increased, and the process parameter characteristics of a production system are influenced; local deficiency causes local risk to be prominent, and the prevention and treatment effect of the hydrate inhibitor is seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a magnetic targeted hydrate inhibitor transportation system and a method for guaranteeing the flow of an underwater production system, aiming at realizing the matching of the transportation degree of a hydrate inhibitor in the whole production system and the distribution of the hydrate risk degree, realizing the targeted transportation and the controllable release of the hydrate inhibitor and ensuring the accurate and efficient prevention and treatment of the hydrate.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a magnetic targeting hydrate inhibitor transportation system, which comprises a storage tank, an injection pump, a controller, a separator and a recoverer, wherein the storage tank is positioned above the water surface; the separator is communicated with the subsea production tree, one end of the recoverer is communicated with the separator to obtain liquid in the separator, and the other end of the recoverer is communicated with the storage tank.
As a further technical scheme, the injection pump is communicated with an underwater distribution integration, the underwater distribution integration is connected with an underwater control module and an electromagnetic short joint, and the underwater control module and the electromagnetic short joint are both connected with the underwater Christmas tree.
As a further technical scheme, the injection pump and the controller are communicated with the underwater distribution integration through an umbilical cable, the underwater distribution integration is connected with an underwater control module through an underwater electro-hydraulic flying line, and the underwater distribution integration is connected with an electromagnetic short joint used for controlling the flow rate of a pipeline through an underwater electric flying line.
As a further technical scheme, the electromagnetic short joint comprises a shell and an electromagnetic coil positioned in the shell.
In a second aspect, the invention further provides a magnetic targeted hydrate inhibitor transportation method, wherein the magnetic targeted hydrate inhibitor transportation system according to the first aspect is used, the magnetic targeted hydrate inhibitor is injected into the underwater Christmas tree through an injection pump, and the injection pump is regulated and controlled during injection to realize quantitative injection of the magnetic targeted hydrate inhibitor; the magnetic targeting hydrate inhibitor in the produced liquid is recovered by the recoverer and is injected into the storage tank, so that the recycling of the magnetic targeting hydrate inhibitor is realized.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
1) according to the invention, the injection pump is controlled, so that the targeted transportation of the hydrate inhibitor can be realized, the concentration of the hydrate inhibitor in a local risk part is improved, the consistency of the transportation degree of the hydrate inhibitor in an underwater production system and the distribution of the hydrate risk degree is realized, and the application effect of the hydrate inhibitor is ensured.
2) According to the invention, an electric control mode is adopted, the device is simple, the operation is convenient, the hydrate risk faced by a hydraulic mode control device is avoided, and the reliability and the safety of the device are high.
3) The invention has high control precision, can realize the fixed-point medicine storage, the directional transportation and the quantitative medicine release of the hydrate inhibitor, and ensures the formulation of an accurate control scheme of the hydrate.
4) The invention is convenient to install, can realize the installation on the basis of the existing underwater production system, and has small investment; the working energy consumption is low, and the operation cost is low; the hydrate inhibitor can be recycled, the economic cost is low, and the pollution to oil gas products is avoided; is beneficial to reducing cost and improving efficiency, and realizes green environmental protection.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Figure 1 is an overall system configuration diagram of the present invention in accordance with one or more embodiments,
in the figure, 1, a storage tank; 2. an injection pump; 3. a controller; 4. an umbilical cable; 5. underwater distribution integration; 6. underwater electro-hydraulic flying line; 7. an underwater control module; 8. an underwater Christmas tree; 9. an underwater manifold; 10. underwater electric flying wire; 11. an electromagnetic nipple; 12. a pipeline; 13. a separator; 14. a gas line; 15. a liquid line; 16. a recoverer; 17. and (6) recovering the pipeline.
In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up" and "down" when used herein are intended to refer only to the directions of up, down, left and right in the drawings themselves, and are not intended to limit the structure, but merely to facilitate description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Term interpretation section: the terms "mounting," "connecting," "fixing," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounting," "connecting," "fixing," and the like may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
Aiming at the defects in the prior art, the invention provides a magnetic targeted hydrate inhibitor transportation system and a method for guaranteeing the flow of an underwater production system, aiming at realizing the matching of the transportation degree of a hydrate inhibitor in the whole production system and the distribution of the hydrate risk degree, realizing the targeted transportation and the controllable release of the hydrate inhibitor and ensuring the accurate and efficient prevention and treatment of the hydrate.
The noun explains:
the underwater control module: an underwater control module (SCM) is a key component of an underwater control system, and controls the opening and the closing of a hydraulic valve inside the SCM by receiving an upper-end main control module MCS or a ground control signal to realize the opening and the closing of various functional valves installed in a Christmas tree, and simultaneously transmits various sensing signals distributed in the Christmas tree and a process to the upper-end main control module MCS after centralized processing, wherein the various signals comprise wellhead pressure and temperature in the Christmas tree, valve position switching signals, the flow of chemical reagents and the like. In order to ensure the reliability of the system, besides the adoption of elements with reliable performance, the redundancy design is also a characteristic of the design of the underwater control module. According to project requirements, the underwater control module can also undertake monitoring and transmission functions of other regional signals.
Underwater distribution integration: the underwater distribution system generally refers to an electro-hydraulic combined type underwater distribution system, which comprises an umbilical cable terminal and an underwater distribution unit, wherein the underwater distribution unit consists of a hydraulic distribution unit and an electric distribution unit, and the umbilical cable terminal is connected with an umbilical cable to realize distribution and transmission of hydraulic and electric pipelines from the water surface to the underwater. The hydraulic distribution unit is connected with the umbilical cable terminal head through a hydraulic flying line, and high-pressure hydraulic liquid and low-pressure hydraulic liquid at the input end and various chemical agents are distributed and conveyed to the output end of the hydraulic distribution unit on the internal metal pipeline, so that the functions of providing hydraulic power for the control equipment and providing chemical agents for the underwater production equipment are realized. The electric distribution unit also adopts a mode that an electric flying wire is connected with an umbilical cable terminal, the electric distribution unit realizes branch output on input photoelectric signals and electric power through a junction box so as to realize the function of providing control signals and electric power for each underwater control module, and the electric distribution system must be provided with an electric circuit isolation device so as to realize the function of isolating a fault circuit.
Example 1
In a typical embodiment of the present invention, as shown in fig. 1, the present embodiment discloses a magnetic targeting hydrate inhibitor transportation system for flow assurance of an underwater production system, which includes an injection mechanism, a regulation mechanism and a recovery mechanism connected to each other.
Wherein, injection mechanism includes: the underwater oil production system comprises a storage tank 1, an injection pump 2, an underwater control module 7, an underwater Christmas tree 8 and an underwater manifold 9, wherein the specific connection relationship of the injection mechanism is that the storage tank 1 is communicated with the injection pump 2 through a pipeline, the injection pump 2 is communicated with an underwater distribution assembly 5 through an umbilical cable 4, the underwater distribution assembly 5 is electrically connected with the underwater control module 7 through an underwater electro-hydraulic flying line 6, the underwater control module 7 is electrically connected with the underwater Christmas tree 8, the underwater Christmas tree 8 is communicated with the underwater manifold 9 through a pipeline, and the underwater manifold 9 is communicated to a production platform through a pipeline.
In the deepwater oil and gas production process, a well bore is required to be drilled for production, fluid products from an oil and gas reservoir reach an underwater Christmas tree 8 through the well bore, are gathered to a pipeline through an underwater manifold 9, are subjected to gas-liquid separation through a separator 13 after flowing to a production platform, a gas phase which does not contain the magnetic targeted hydrate inhibitor and is obtained by the separator 13 is output through a gas pipeline 14, and a liquid phase which contains the magnetic targeted hydrate inhibitor is output through a liquid pipeline 15.
The magnetic targeted hydrate inhibitor is stored in a storage tank 1 on a production platform, the injection pump 2 pumps the magnetic targeted hydrate inhibitor to an underwater distribution integration 5 through a medicament pipeline in an umbilical cable 4, and then the magnetic targeted hydrate inhibitor is distributed to an underwater Christmas tree 8 of each well through an underwater electro-hydraulic flying line 6; the injection rate of the magnetic targeting hydrate inhibitor required by the underwater production system is determined according to the hydrate flow guarantee scheme, the designed injection rate is achieved by adjusting the injection pump 2, the distribution amount of the magnetic targeting hydrate inhibitor of each well is regulated and controlled by the underwater control module 7, and the magnetic targeting hydrate inhibitor injected by the underwater Christmas tree 8 is mixed with fluid produced by a shaft and enters a downstream underwater manifold 9 and a pipeline.
Wherein, regulation and control mechanism includes: the underwater electric flying cable comprises an electromagnetic pup joint 11, an above-water controller 3, an underwater distribution assembly 5, an underwater electric flying cable 10 and an electromagnetic pup joint 11, wherein the electromagnetic pup joint 11, the above-water controller 3 is connected with the underwater distribution assembly 5 through an umbilical cable 4, and the underwater electric flying cable 10, through which the underwater distribution assembly 5 passes, is connected with the electromagnetic pup joint 11; it will be appreciated that the connections between the components of the conditioning mechanism are all electrically connected and are in the form of a waterproof electrical connection, such as a cable wrapped with a sealing tube.
The position of the electromagnetic short section 11 in the pipeline is determined by the design of an early-stage deep water flowing guarantee scheme; the electromagnetic short joint 11 is connected with the underwater distribution integration 5 of the umbilical cable 4 through an underwater electric flying line 10 to obtain electric power required by operation; the electromagnetic pup joint 11 waterborne controller 3 sequentially establishes a signal channel with the electromagnetic pup joint 11 through an umbilical cable 4, an underwater distribution integration 5, an underwater electric flying line 10 and the electromagnetic pup joint 11, transmits a control signal to the electromagnetic pup joint 11, and regulates and controls magnetic field parameters in the electromagnetic pup joint 11, so that the distribution of the magnetic targeted hydrate inhibitor in a flow field in the electromagnetic pup joint 11 is regulated and controlled, fixed-point medicine storage, directional transportation and quantitative medicine release are realized, and the concentration distribution of the magnetic targeted hydrate inhibitor in a pipeline at the downstream of the electromagnetic pup joint 11 in the axial direction and the radial direction of the pipeline; the regulation and control strategy of the electromagnetic pup joint 11 water controller 3 is determined according to the hydraulic parameter change characteristics in the underwater production system.
The recovery mechanism comprises a separator 13, a gas pipeline 14, a liquid pipeline 15, a recoverer 16 and a recovery pipeline 17, the specific connection relationship is that the separator 13 is communicated with the electromagnetic nipple 11 through a pipeline 12 so as to achieve the purpose that the separator 13 is communicated with the subsea Christmas tree 8, and the separator 13 is communicated with the recoverer 16 through the liquid pipeline 15; the recoverer 16 is communicated with the storage tank 1 through a recovery pipeline 17; in addition, the separator 13 is communicated with a gas pipeline 14, and the gas pipeline 14 conveys the separated gas without the magnetic targeted hydrate inhibitor to downstream processing equipment.
The phase state characteristics of the magnetic targeting hydrate inhibitor cause that the magnetic targeting hydrate inhibitor can only be distributed in a liquid phase and can not enter a gas phase; after the multiphase fluid containing the magnetic targeted hydrate inhibitor in the pipeline reaches a production platform, gas-liquid separation is carried out through a separator 13; the gas pipeline 14 conveys the separated gas without the magnetic targeted hydrate inhibitor to downstream processing equipment, and the liquid pipeline 15 conveys the liquid with the magnetic targeted hydrate inhibitor to a recoverer 16; the recoverer 16 determines working parameters according to the injection rate of the injection pump 2 and the control strategy of the electromagnetic pup joint 11 waterborne controller 3, and realizes the complete recovery of the magnetic targeted hydrate inhibitor in the liquid phase; the recovered magnetic targeted hydrate inhibitor is transported to the storage tank 1 through a recovery pipeline 17, so that the cyclic utilization of the magnetic targeted hydrate inhibitor is realized.
It is to be understood that the umbilical cable 4 in this embodiment is an umbilical cable 4 commonly used in the art; the underwater electro-hydraulic flying line 6, the underwater electric flying line and the underwater manifold 9 in the embodiment are common technologies in the prior art; the separator 13 in this embodiment is a gas-liquid separator 13, and the recoverer 16 is a liquid recoverer 16, which are common technical means in the prior art.
Example 2
The invention discloses a magnetic targeting hydrate inhibitor transportation method for flow assurance of an underwater production system, which is characterized in that the magnetic targeting hydrate inhibitor transportation system for flow assurance of the underwater production system is used, the magnetic targeting hydrate inhibitor is injected into an underwater Christmas tree 8 through an injection pump 2, and the injection pump 2 is regulated and controlled during injection to realize quantitative injection of the magnetic targeting hydrate inhibitor; the magnetic targeting hydrate inhibitor in the produced liquid is recovered through the recoverer 16 on the platform, so that the recycling of the magnetic targeting hydrate inhibitor is realized.
More specifically, the injection device adopts an injection pump 2 to inject the magnetic targeted hydrate inhibitor into an underwater Christmas tree 8 through a medicament pipeline, an underwater distribution assembly 5 and an underwater electro-hydraulic flying line 6 in an umbilical cable 4, so as to realize the quantitative injection of the magnetic targeted hydrate inhibitor;
the regulation and control device realizes the regulation of the working parameters of the electromagnetic short section 11 through the waterborne controller 3 of the electromagnetic short section 11 positioned on the platform, thereby regulating the parameters of a magnetic field generated by the electromagnetic short section 11 and realizing the regulation and control of the transportation of the magnetic targeted hydrate inhibitor;
the recovery device recovers the magnetic targeting hydrate inhibitor in the output liquid through a recoverer 16 on the platform, so that the recycling of the magnetic targeting hydrate inhibitor is realized.
The injection pump 2 meets the pumping requirement of the magnetic targeting hydrate inhibitor, and does not influence the structure and distribution of the magnetic targeting hydrate inhibitor.
The electromagnetic short joint 11 is connected with the underwater distribution integration 5 through an underwater electric flying wire 10 to realize the transmission of electric power and signals; the electromagnetic short section 11 consists of a shell and an electromagnetic coil positioned in the shell, and when liquid flows through the electromagnetic coil, the electromagnetic short section 11 can detect the flow of the liquid; the shell is made of stainless steel non-magnetic-conductive material; the electromagnetic nipple 11 is connected with the pipeline through a flange.
The electromagnetic pup joint 11 water controller 3 controls the working parameters of the electromagnetic pup joint 11 through cables in the umbilical cable 4.
The retriever 16 retrieves the magnetically targeted hydrate inhibitor in the liquid phase by magnetic field force.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A magnetic targeting hydrate inhibitor transportation system is characterized by comprising a storage tank, an injection pump, a controller, a separator and a recoverer, wherein the storage tank is positioned above the water surface; the separator is communicated with the subsea production tree, one end of the recoverer is communicated with the separator to obtain liquid in the separator, and the other end of the recoverer is communicated with the storage tank.
2. The system for transporting a magnetic targeted hydrate inhibitor according to claim 1, wherein the injection pump is connected with an underwater distribution integration, the underwater distribution integration is connected with an underwater control module and an electromagnetic nipple, and the underwater control module and the electromagnetic nipple are both connected with the underwater Christmas tree.
3. The magnetically targeted hydrate inhibitor delivery system according to claim 2, wherein the controller is connected to the electromagnetic sub and the subsea control module.
4. The magnetic targeted hydrate inhibitor transport system of claim 1, wherein the separator is a gas-liquid separator and the recuperator is a liquid recuperator.
5. The magnetically targeted hydrate inhibitor delivery system according to claim 1, wherein the separator is connected to a gas line and a liquid line, the separator being in communication with the storage tank via the liquid line.
6. The magnetically targeted hydrate inhibitor delivery system according to claim 5, wherein the gas line communicates with a process facility.
7. The system for transporting a magnetic targeted hydrate inhibitor according to claim 1, wherein the injection pump and the controller are communicated with the underwater distribution assembly through an umbilical, the underwater distribution assembly is connected with an underwater control module through an underwater electro-hydraulic flying line, and the underwater distribution assembly is connected with an electromagnetic short joint for controlling the flow rate of a pipeline through the underwater electro-hydraulic flying line.
8. The system for transporting a magnetic targeted hydrate inhibitor according to claim 1, wherein the subsea tree is connected to a subsea manifold, the subsea manifold is connected to the separator through a pipeline, and an electromagnetic nipple is arranged on the pipeline.
9. The magnetically targeted hydrate inhibitor delivery system according to claim 2, 3 or 8, wherein the electromagnetic sub comprises a housing and an electromagnetic coil located within the housing.
10. The method for transporting the magnetic targeted hydrate inhibitor is characterized in that the magnetic targeted hydrate inhibitor is injected into an underwater Christmas tree through an injection pump by using the magnetic targeted hydrate inhibitor transportation system as claimed in any one of claims 1 to 9, and the injection pump is regulated and controlled during injection to realize quantitative injection of the magnetic targeted hydrate inhibitor; the magnetic targeting hydrate inhibitor in the produced liquid is recovered by the recoverer and is injected into the storage tank, so that the recycling of the magnetic targeting hydrate inhibitor is realized.
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| CN113072922A (en) * | 2021-04-01 | 2021-07-06 | 大连理工大学 | Magnetic hydrate inhibitor, slurry and preparation method thereof |
| CN114777033A (en) * | 2022-04-28 | 2022-07-22 | 大连理工大学 | Carbon dioxide pipeline transportation guarantee system and method applying recyclable inhibitor |
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| CN111980635B (en) | 2022-10-18 |
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