Wet saturated steam gas-liquid two-phase comparison measurement system

Abstract

The utility model relates to the technical field of heavy oil recovery in alpine regions, in particular to a wet saturated steam gas-liquid two-phase ratio measuring system which comprises a main pipeline, a sampling cooler and a control system. The sampling cooler is provided with a cooling liquid inlet pipeline, a cooling liquid outlet pipeline, a sample feeding pipeline and a sample discharging pipeline; a metering pump and a first temperature transmitter are arranged on the cooling liquid inlet pipeline; a third temperature transmitter is arranged on the cooling liquid outlet pipeline; the sample introduction pipeline is connected with the main pipeline; a second temperature transmitter and a flow meter are arranged on the sample outlet pipeline; a pressure transmitter is arranged on the main pipeline; and the control system is respectively in communication connection with each device and instrument. The system can measure the gas-liquid two-phase ratio of the wet steam injected in the thickened oil recovery process, so that the gas-liquid two-phase ratio of the wet steam can be monitored and controlled in real time, and energy conservation and consumption reduction are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heavy oil exploitation in alpine regions, and particularly relates to a wet saturated steam gas-liquid two-phase ratio measuring system. BACKGROUND

[0002] In heavy oil exploitation, high-temperature and high-pressure wet steam with high water content is often injected into the ground, and the steam-liquid ratio of the wet steam is crucial to energy saving and consumption reduction. The steam-liquid ratio of the two-phase system is often controlled during the exploitation process, and the premise of the control is measurement. Therefore, it is necessary to develop a wet saturated steam gas-liquid two-phase ratio measuring system.

[0003] In view of this, the utility model is provided. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a wet saturated steam gas-liquid two-phase ratio measuring system, which can measure the wet steam gas-liquid two-phase ratio injected in the heavy oil exploitation process, so as to monitor and control the steam-liquid two-phase ratio of the wet steam in real time, and is beneficial to energy saving and consumption reduction.

[0005] The utility model provides a wet saturated steam gas-liquid two-phase ratio measuring system, which comprises a main pipeline and further comprises a sampling cooler and a control system.

[0006] Preferably, one end of the cooling liquid inlet pipeline is connected to a buffer tank for storing cooling liquid, and a metering pump and a first temperature transmitter are sequentially arranged on the cooling liquid inlet pipeline according to the liquid inlet direction of the cooling liquid.

[0007] Preferably, a third temperature transmitter and an air cooler are sequentially arranged on the cooling liquid outlet pipeline according to the liquid outlet direction of the cooling liquid.

[0008] Preferably, the outlet end of the cooling liquid outlet pipeline is connected to the buffer tank.

[0009] Preferably, a sampling valve is arranged on the sampling pipeline.

[0010] Preferably, a flow restrictor is arranged on the sampling pipeline, and the sampling valve and the flow restrictor are sequentially arranged according to the sampling direction.

[0011] Preferably, a second temperature transmitter and a flow meter are arranged in sequence on the sample outlet pipeline in the sample outlet direction.

[0012] Preferably, the outlet end of the sample outlet pipeline is connected with a condensate water collecting device.

[0013] Preferably, a bypass heat exchange pipeline is arranged in the sample cooler, and the sampled sample in the heat exchange pipeline exchanges heat with the cooling liquid outside the heat exchange pipeline.

[0014] Preferably, the control system adopts a PLC control system.

[0015] Preferably, the system is used in the measurement of the gas-liquid two-phase ratio of steam injection in high-cold regions.

[0016] Preferably, in order to meet the antifreeze requirements of high-cold environments, the cold source of the sample cooler adopts an antifreeze cooling liquid, and the freezing point of the cooling liquid is selected according to the local outdoor environment.

[0017] The utility model has at least the following beneficial effects:

[0018] The wet saturated steam gas-liquid two-phase ratio measurement system can measure the wet steam gas-liquid two-phase ratio injected in the thick oil exploitation process, so as to realize real-time monitoring and control of the wet steam gas-liquid two-phase ratio, and is beneficial to energy saving and consumption reduction. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0020] Figure 1 The wet saturated steam gas-liquid two-phase ratio measurement system provided by the utility model is shown in the structure diagram.

[0021] Mark explanation: 1, main pipeline;2, pressure transmitter;3, sampling valve;4, flow limiting orifice plate;5, sampling cooler;6, first temperature transmitter;7, metering pump;8, buffer tank;9, third temperature transmitter;10, air cooler;11, second temperature transmitter;12, flow meter;13, condensate water collecting device;14, control system. DETAILED DESCRIPTION

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example

[0026] like Figure 1 As shown, this embodiment provides a wet saturated steam-liquid two-phase measurement system, including: a main pipeline 1, and further including: a sampling cooler 5 and a control system 14; the sampling cooler 5 is provided with a coolant inlet pipeline, a coolant outlet pipeline, a sample inlet pipeline and a sample outlet pipeline; a metering pump 7 and a first temperature transmitter 6 are provided on the coolant inlet pipeline; a third temperature transmitter 9 is provided on the coolant outlet pipeline; the sample inlet pipeline is connected to the main pipeline 1; a second temperature transmitter 11 and a flow meter 12 are provided on the sample outlet pipeline; a pressure transmitter 2 is provided on the main pipeline 1; the control system 14 is communicatively connected to the first temperature transmitter 6, the second temperature transmitter 11, the third temperature transmitter 9, the metering pump 7, the flow meter 12 and the pressure transmitter 2 respectively.

[0027] In the embodiment, one end of the cooling liquid inlet pipeline is connected with the buffer tank 8 for storing the cooling liquid, and the metering pump 7 and the first temperature transmitter 6 are sequentially arranged on the cooling liquid inlet pipeline according to the liquid inlet direction of the cooling liquid.

[0028] In the embodiment, the third temperature transmitter 9 and the air cooler 10 are sequentially arranged on the cooling liquid outlet pipeline according to the liquid outlet direction of the cooling liquid. In the high-cold region, water is easily frozen and cannot be used; if air is directly cooled, the heat is not easy to measure; therefore, the antifreezing cooling liquid is used for cooling, and the air cooler 10 is used for cooling the cooling liquid, which is more suitable for the actual application in the high-cold region.

[0029] In the embodiment, the outlet end of the cooling liquid outlet pipeline is connected with the buffer tank 8.

[0030] In the embodiment, the sampling valve 3 is arranged on the sample inlet pipeline.

[0031] In the embodiment, the flow restrictor 4 is arranged on the sample inlet pipeline, and the sampling valve 3 and the flow restrictor 4 are sequentially arranged according to the sample inlet direction.

[0032] In the embodiment, the second temperature transmitter 11 and the flow meter 12 are sequentially arranged on the sample outlet pipeline according to the sample outlet direction.

[0033] In the embodiment, the outlet end of the sample outlet pipeline is connected with the condensate water collecting device 13.

[0034] In the embodiment, the bypass heat exchange pipeline is arranged in the sampling cooler 5, and the sampled sample in the heat exchange pipeline exchanges heat with the cooling liquid outside the heat exchange pipeline.

[0035] In the embodiment, the control system 14 adopts the PLC control system.

[0036] The working principle and working process of the utility model are as follows:

[0037] When heavy oil is exploited, the high-speed flowing wet saturated steam is usually in a turbulent state under most actual working conditions, the sample of the wet saturated steam is branched from the main pipeline 1 by the sampling valve 3, enters the sampling cooler 5, and is cooled to below 100 DEG C by the cooling liquid, so that the wet saturated steam is converted into liquid water and leaves the cooler. The second temperature transmitter 11 and the flow meter 12 arranged on the sample outlet pipeline after the cooler read T3 and M1 respectively.

[0038] Since the medium in the main pipeline 1 is in saturated state, the enthalpy values of saturated water and saturated steam under the pressure measured by the pressure transmitter 2 arranged in the main pipeline 1 can be found, which are h and H respectively. The readings of the metering pump 7 arranged in the cooling liquid inlet pipeline and the first temperature transmitter 6 and the third temperature transmitter 9 arranged in the cooling liquid inlet pipeline and the cooling liquid outlet pipeline are M2, T2 and T1 respectively. The cooling liquid absorbs the heat of the sample after passing through the cooler and is then cooled again by using the external environment, i.e. the air cooler 10. The cooling liquid part and the sample water part in the system should be made of the same material and the external contact area should be controlled to be approximate so as to ensure that the heat loss is offset.

[0039] According to the total heat absorption of the cooling liquid = the total heat release of the sample, the total heat release of the gas phase in the sample is obtained through the heat balance analysis, and then the gas-liquid two-phase ratio in the sample is calculated.

[0040] The liquid phase mass ratio of the sample is X, which is obtained through the heat balance analysis.

[0041] X = {M2C2(T2-T1) + M1C1T3-HM1} / ((h-H)M1)

[0042] Wherein,

[0043] M1 is the accumulated flow of the flowmeter condensate, unit: kg;

[0044] M2 is the accumulated flow of the metering pump cooling liquid, unit: kg;

[0045] T1 is the reading of the third temperature transmitter, unit: ℃;

[0046] T2 is the reading of the first temperature transmitter, unit: ℃;

[0047] T3 is the reading of the second temperature transmitter, unit: ℃;

[0048] h is the enthalpy value of saturated water under the reading of the pressure transmitter, unit: kj / kg;

[0049] H is the enthalpy value of saturated steam under the reading of the pressure transmitter, unit: kj / kg;

[0050] C1 is the specific heat of the condensate, unit: kj / (kg ℃);

[0051] C2 is the specific heat of the cooling liquid, unit: kj / (kg ℃).

[0052] The PLC calculator arranged in the control system 14 inputs the enthalpy values of the gas phase and the liquid phase under different pressures and the specific heat of the cooling liquid into the calculator, and inputs the measurement results into the PLC control system in real time, so that the gas-liquid ratio can be displayed in real time, achieving the effect of automation.

[0053] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wet-saturation steam gas-liquid two-phase ratio measurement system, comprising: The main pipeline is characterized in that it further comprises a sampling cooler and a control system; the sampling cooler is provided with a cooling liquid inlet pipeline, a cooling liquid outlet pipeline, a sample inlet pipeline and a sample outlet pipeline; the cooling liquid inlet pipeline is provided with a metering pump and a first temperature transmitter; the cooling liquid outlet pipeline is provided with a third temperature transmitter; the sample inlet pipeline is connected with the main pipeline; the sample outlet pipeline is provided with a second temperature transmitter and a flow meter; the main pipeline is provided with a pressure transmitter; and the control system is in communication connection with each device and instrument respectively.

2. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 1, wherein, One end of the cooling liquid inlet pipeline is connected with a buffer tank for storing cooling liquid, and a metering pump and a first temperature transmitter are sequentially arranged on the cooling liquid inlet pipeline in the direction of the inlet of the cooling liquid.

3. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 1, wherein, A third temperature transmitter and an air cooler are sequentially arranged on the cooling liquid outlet pipeline in the direction of the outlet of the cooling liquid.

4. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 2, wherein, The outlet end of the cooling liquid outlet pipeline is connected with the buffer tank.

5. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 1, wherein, A sampling valve is arranged on the sample inlet pipeline.

6. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 5, wherein, A flow restrictor is arranged on the sample inlet pipeline, and the sampling valve and the flow restrictor are sequentially arranged in the direction of the sample inlet.

7. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 1, wherein, A second temperature transmitter and a flow meter are sequentially arranged on the sample outlet pipeline in the direction of the sample outlet.

8. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 1, wherein, The outlet end of the sample outlet pipeline is connected with a condensate water collecting device.

9. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 1, wherein, A circuitous heat exchange pipeline is arranged in the sampling cooler, and the sampled sample inside the heat exchange pipeline exchanges heat with the cooling liquid outside the heat exchange pipeline.

10. The wet-saturation steam gas-liquid two-phase ratio measurement system of claim 1, wherein, The control system adopts a PLC control system.

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