WO2017133588A1 - 一种油气水三相流量计 - Google Patents

一种油气水三相流量计 Download PDF

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WO2017133588A1
WO2017133588A1 PCT/CN2017/072454 CN2017072454W WO2017133588A1 WO 2017133588 A1 WO2017133588 A1 WO 2017133588A1 CN 2017072454 W CN2017072454 W CN 2017072454W WO 2017133588 A1 WO2017133588 A1 WO 2017133588A1
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gas
phase
liquid
flowmeter
oil
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PCT/CN2017/072454
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English (en)
French (fr)
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卢玖庆
王良贵
卢嘉骏
王红春
丁勇彬
朱峰
周琪
王彬臣
何宇
寇晓东
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新疆中元天能油气科技股份有限公司
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Priority to US15/525,586 priority Critical patent/US20180073903A1/en
Publication of WO2017133588A1 publication Critical patent/WO2017133588A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F7/00—Volume-flow measuring devices with two or more measuring ranges; Compound meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow

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  • the invention belongs to the technical field of measurement of multiphase flow, in particular to oil and gas water three-phase flowmeter of oil and gas field.
  • the integrated gas-liquid two-phase flowmeter is small in size, cost-effective, and has a very strong market competitiveness. It has been promoted and applied in the gas-liquid two-phase flow market and is well received by users, especially for condensing natural gas and liquid.
  • the gas-liquid two-phase flow measurement of shale gas and thin oil wells is promising, but the current multi-phase flow measurement products have a relatively small measurement range.
  • the general range ratio is 6:1 or 10:1, and the gas-liquid volume ratio is 10 -100:1, far from meeting the requirements of process measurement.
  • some users need three-phase flow measurement of oil, gas and water. If the traditional sampling gas-liquid separation method is used and the oil is measured, it needs to be equipped with multiple electric valves.
  • the utility model is also a pressure vessel, has high safety hazard, high management cost and large volume, especially for measuring high-pressure medium; if other forms are used to measure the phase fraction of oil, gas and water online, the structure is complicated, the cost is high, and the stability is poor. And most of the products are also equipped with radioactive sensors, many users are unwilling to accept, this patent is a good solution to the above two problems.
  • the object of the present invention is to provide a wide range of gas-liquid two-phase flowmeter and a small sampling and measuring oily water-containing device combined with the oil-gas-water three-phase flowmeter, the gas-liquid volume ratio of the three-phase flowmeter is 1000:1, With a range ratio of up to 300:1, it has the characteristics of small size and high cost performance.
  • the present invention adopts the following technical solutions:
  • An oil-gas-water three-phase flowmeter comprising a main line, a mixer, a pressure sensor and a gas-liquid two-phase flowmeter are arranged in sequence on a horizontal straight pipe section of the main line, and a flow computer is arranged on the gas-liquid two-phase flow meter head a sampling bypass pipe is connected to the horizontal straight pipe section of the main line between the mixer and the gas-liquid two-phase flow meter, and a flow regulating valve and a column type cyclone separator are arranged in sequence on the sampling bypass pipe, and the pipe string is arranged The top gas phase line of the cyclone separator is connected with the gas flow meter, and the bottom of the tube-type cyclone separator is connected with the liquid phase outlet line, and the mass flow meter or the oil water meter and the liquid phase are arranged on the horizontal straight pipe section of the liquid phase outlet line.
  • Flow meter; the flow computer is connected to the pressure sensor, the mass flow meter or the oil water meter and the liquid phase flow meter through the data
  • a differential pressure switch valve is connected to the output end of the gas-liquid two-phase flowmeter on the main line, and a small-caliber small-flow flowmeter is connected in parallel on both ends of the differential pressure switch valve, and the small-caliber small-flow flowmeter passes data.
  • the line is connected to the flow computer.
  • the small-caliber small-flow flowmeter is a throttle flowmeter, a speed flowmeter or an ultrasonic flowmeter.
  • the volumetric and pressure product of the column-type cyclone separator is less than 2.5 MPa, and the sensor housing of the mass flow meter is set to a horizontal direction.
  • the sampling bypass pipe is connected to the column-type cyclone separator inlet A point higher than the liquid phase outlet line and the gas phase pipeline junction access tray-line inlet B point 1-1000 mm.
  • the invention adopts the above structure, and the gas-liquid two-phase flow rate is measured by the gas-liquid two-phase flow meter on the main line, and the liquid phase and the gas phase are separated by the small gas-liquid separation tube in the bypass line, and the mass flow meter is used in the liquid phase and the density method is used.
  • the water content of the oil is measured or the oil water content is measured by the oil water meter and the liquid phase flow meter, and finally the three-phase flow rate of the oil and gas is obtained by the flow computer.
  • the differential pressure switch valve is closed.
  • the gas-liquid mixed flow rate in the main line is measured by the small-diameter small flow meter, and the gas in the main line is controlled.
  • the liquid mixing density is still measured by the gas-liquid two-phase flow meter.
  • the gas-liquid two-phase flow can still be calculated by the flow computer.
  • the differential pressure switch valve is opened.
  • the gas-liquid mixed flow rate and the gas-liquid mixed density are separately measured by the gas-liquid two-phase flowmeter, and the small-caliber small-flow flowmeter does not participate in the measurement, thereby ensuring that the entire measuring device can ensure measurement within a wide measurement range.
  • the invention is not a pressure vessel, has small volume and high cost performance, and the gas-liquid volume ratio of the three-phase flowmeter working condition is 1000:1, the range ratio is up to 300:1, and the measuring range is greatly improved, which is an ideal multiphase flow product.
  • Figure 1 is a schematic view of the present invention
  • FIG. 2 is a schematic view of another embodiment of the present invention.
  • the oil-gas-water three-phase flowmeter of the present invention comprises a main line 1, and a mixer 2, a pressure sensor 3 and a gas-liquid two-phase flowmeter are sequentially disposed on a horizontal straight pipe section of the main line 1. 4.
  • a flow computer 5 is arranged on the head of the gas-liquid two-phase flow meter 4, and a sampling bypass pipe 6 is connected to the horizontal straight pipe section of the main line 1 between the mixer 2 and the gas-liquid two-phase flow meter 4, next to the sampling.
  • the flow pipe 6 is sequentially provided with a flow regulating valve 7 and a column-type cyclone separator 8, and the top gas phase line 9 of the column-type cyclone separator 8 is connected with the gas flow meter 10, and the bottom of the column-type cyclone separator 8 is
  • the liquid phase outlet line 11 is connected, and a mass flow meter 12 is disposed on the horizontal straight pipe section of the liquid phase outlet line 11; the flow rate computer 5 is connected to the pressure sensor 3 and the mass flow meter 12 through the data line, respectively.
  • the oil water meter 12 and the liquid phase flow meter 16 replace the mass flow meter 12 of FIG.
  • a differential pressure switch valve 13 is connected to the output end of the gas-liquid two-phase flow meter 4 on the main line 1, and a small-caliber small-flow flow meter 14 is connected in parallel on both ends of the differential pressure switch valve 13, the small-diameter small-flow flow rate
  • the meter 14 is connected to the flow computer 5 via a data line.
  • the small-caliber small-flow flow meter 14 is a throttle type flow meter, a speed type flow meter, or an ultrasonic type flow meter.
  • the volumetric and pressure product of the column-type cyclone separator 8 is less than 2.5 MPa, and the sensor housing of the mass flow meter 12 is set to the horizontal direction.
  • the liquid phase outlet line 11 is merged with the gas phase line 9 and connected to the bypass line 15, the bypass line 15 is connected to the main line 1, and the sampling bypass tube 6 is connected to the inlet of the column type cyclone separator 8 at a point higher than Liquid phase outlet line 11 and gas phase line 9 Convergence access to the pipeline access point B point 1-1000mm.
  • the main line 1 measures the gas-liquid two-phase flow rate with the gas-liquid two-phase flow meter 4, the gas phase density is externally manually input to the flow computer 5, and the liquidus density is determined by the sampling bypass in the mass flow meter 12
  • the flow computer 5 calculates the gas-liquid two-phase flow rate according to the measured pressure, and separates the liquid phase and the gas phase in the sampling bypass column-type cyclone separator 8, and the liquid phase uses the mass flow meter 12 and adopts Density method to measure the water content of the oil, or use the oil water meter 12 and the liquid phase flow meter 16 as shown in Figure 2 to measure the water content of the oil, and also obtain the liquid phase density, and finally obtain the oil, gas and water three-phase through the flow computer. flow.
  • the differential pressure switching valve 13 is closed, and the gas-liquid mixed flow rate in the main line 1 is measured by the small-diameter small-flow flow meter 14 at this time.
  • Volume flow rate, the gas-liquid mixed density in the main line 1 is still measured by the gas-liquid two-phase flow meter 4, and the gas-liquid two-phase flow rate can still be calculated by the flow computer 5, when the gas-liquid mixed flow rate in the main line 1 is greater than the gas-liquid two-phase flow
  • the differential pressure switch valve 13 is opened.
  • the gas-liquid mixed flow rate and the gas-liquid mixed density are separately measured by the gas-liquid two-phase flow meter 4, and the small-caliber small-flow flow meter 14 does not participate in the measurement, so that The measurement unit and the small pressure loss can be guaranteed in a wide measuring range.
  • the invention is not a pressure vessel, has small volume and high cost performance, and the gas-liquid volume ratio of the three-phase flowmeter working condition is 1000:1, the range ratio is up to 300:1, and the measuring range is greatly improved, which is an ideal multiphase flow product.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

一种油气水三相流量计，其包括主管线（1），在主管线（1）水平直管段上依次设置有混合器（2）、压力传感器（3）和气液两相流量计（4），在气液两相流量计（4）表头上设置有流量计算机（5），在混合器（2）与气液两相流量计（4）之间主管线（1）水平直管段连接有取样旁通管（6），在取样旁通管（6）上依次设置有流量调节阀（7）和管柱式旋流分离器（8），管柱式旋流分器（8）顶部气相管线（9）与气体流量计（10）连接，管柱式旋流分器（8）底部与液相出口管线（11）相连，在液相出口管线（11）水平直管段上设置有质量流量计（12）或油含水仪（12）和液相流量计（16），流量计算机（5）通过数据线分别与压力传感器（3）、质量流量计（12）或油含水仪（12）和液相流量计（16）连接。

Description

一种油气水三相流量计 技术领域
本发明属于多相流的测量技术领域，尤其是油气田的油气水三相流量计。
背景技术
目前，一体型气液两相流量计，体积小，性价比高，具有非常强的市场竞争力，已在气液两相流量市场推广应用，深受用户好评，尤其是对凝析天然气、含液页岩气和稀油井的气液两相流量测量，前景看好，但目前的多相流计量产品测量范围比较小，一般量程比在6:1或10:1，工况气液体积比在10-100：1，远远不能满足工艺测量要求，另外，部分用户需要油、气、水三相流量测量，如果采用传统取样气液分离法，再测量油含水，需配多个电动阀门，分离器又属压力容器，安全隐患高，管理费用高，体积庞大，尤其是对高压介质的测量；若采用其他形式在线测量油、气、水的分相率，结构复杂，成本高，稳定性差，并且大多产品还配有放射性传感器，很多用户不愿接受，本专利则很好的解决了以上两个难题。
发明内容
本发明的目的在于提供一种宽范围的气液两相流量计及小型取样测量油含水装置所组合成的油气水三相流量计，该三相流量计工况气液体积比1000：1，量程比可达300:1，具有体积小、性价比高的特点。
为实现上述目的，本发明采用以下技术方案：
一种油气水三相流量计，其包括主管线，在主管线水平直管段上依次设置有混合器、压力传感器和气液两相流量计，在气液两相流量计表头上设置有流量计算机，在所述混合器与气液两相流量计之间主管线水平直管段连接有取样旁通管，在取样旁通管上依次设置有流量调节阀和管柱式旋流分离器，管柱式旋流分离器顶部气相管线与气体流量计连接，管柱式旋流分离器底部与液相出口管线相连，在液相出口管线水平直管段上设置有质量流量计或油含水仪和液相流量计；所述流量计算机通过数据线分别与压力传感器、质量流量计或油含水仪和液相流量计连接。
所述主管线上在气液两相流量计的输出端连接有差压开关阀，在差压开关阀的两端上并联连接有小口径小流量流量计，该小口径小流量流量计通过数据线与流量计算机连接。
所述小口径小流量流量计为节流式流量计、速度式流量计或超声波式流量计。
所述管柱式旋流分离器的容积与压力之积小于2.5MpaL，所述质量流量计的传感器外壳设置为水平方向。
所述取样旁通管接入管柱式旋流分离器入口A点高于液相出口管线与气相管线汇合接入盘通管线入口B点1-1000mm。
本发明采用以上结构，在主管线上用气液两相流量计测量气液两相流量，在旁通管线用小型气液分离管分离出液相和气相，液相采用质量流量计并用密度法测出油含水或采用油含水仪和液相流量计测出油含水，最终通过流量计算机得到油气水三相流量。当主管线内的气液混合流量小于气液两相流量计流量下限时，差压开关阀关闭，此时主管线内气液混合流量由小口径小流量计测量体积流量，主管线内的气液混合密度仍然由气液两相流量计测量，通过流量计算机仍然可以计算出气液两相流量，当主管线内气液混合流量大于气液两相流量计流量下限时，差压开关阀打开，此时，由气液两相流量计单独测得气液混合流量和气液混合密度，小口径小流量流量计不参与测量，这样可保障整个测量装置在很宽的测量范围内，都能保障测量精度和较小的压损。本发明不属压力容器，体积小，性价比高，而且三相流量计工况气液体积比1000：1，量程比可达300:1,测量范围大大提高，是理想的多相流产品。
附图说明
以下结合附图和具体实施方式对本发明做进一步详细说明；
图1为本发明的示意图；
图2为本发明另一种实施方式的示意图。
具体实施方式
如图1或图2所示，本发明一种油气水三相流量计，其包括主管线1，在主管线1水平直管段上依次设置有混合器2、压力传感器3和气液两相流量计4，在气液两相流量计4表头上设置有流量计算机5，在混合器2与气液两相流量计4之间主管线1水平直管段连接有取样旁通管6，在取样旁通管6上依次设置有流量调节阀7和管柱式旋流分离器8，管柱式旋流分离器8顶部气相管线9与气体流量计10连接，管柱式旋流分离器8底部与液相出口管线11相连，在液相出口管线11水平直管段上设置有质量流量计12；流量计算机5通过数据线分别与压力传感器3、质量流量计12连接。另外，作为另一种实施方式，如图2所示，油含水仪12和液相流量计16替换如图1中的质量流量计12。
主管线1上在气液两相流量计4的输出端连接有差压开关阀13，在差压开关阀13的两端上并联连接有小口径小流量流量计14，该小口径小流量流量计14通过数据线与流量计算机5连接。
小口径小流量流量计14为节流式流量计、速度式流量计或超声波式流量计。
管柱式旋流分离器8的容积与压力之积小于2.5MpaL，质量流量计12的传感器外壳设置为水平方向。
液相出口管线11与气相管线9汇合后与旁通管线15连接，旁通管线15再与主管线1连接，而且取样旁通管6接入管柱式旋流分离器8入口A点高于液相出口管线11与气相管线9 汇合接入盘通管线入口B点1-1000mm。
本发明的工作原理:主管线1用气液两相流量计4测量气液两相流量，气相密度是外部手动输入到流量计算机5，而液相密度是由取样旁路中质量流量计12中测得的，最后由流量计算机5再根据所测压力计算出气液两相流量，在取样旁路用管柱式旋流分器8分离出液相和气相，液相用质量流量计12并采用密度法测出油含水，或采用如图2所示的油含水仪12和液相流量计16测出油含水，同时也可得到液相密度，最终通过流量计算机得到油、气、水三相流量。
此外，当主管线1内的气液混合流量小于气液两相流量计4流量下限时，差压开关阀13关闭，此时主管线1内气液混合流量由小口径小流量流量计14测量体积流量，主管线1内的气液混合密度仍然由气液两相流量计4测量，通过流量计算机5仍然可以计算出气液两相流量，当主管线1内气液混合流量大于气液两相流量计4流量下限时，差压开关阀13打开，此时，由气液两相流量计4单独测得气液混合流量和气液混合密度，小口径小流量流量计14不参与测量，这样可保障整个测量装置在很宽的测量范围内，都能保障测量精度和较小的压损。
本发明不属压力容器，体积小，性价比高，而且三相流量计工况气液体积比1000：1，量程比可达300:1,测量范围大大提高，是理想的多相流产品。

Claims (5)

  1. 一种油气水三相流量计，其包括主管线，在主管线水平直管段上依次设置有混合器、压力传感器和气液两相流量计，在气液两相流量计表头上设置有流量计算机，其特征在于：在所述混合器与气液两相流量计之间主管线水平直管段连接有取样旁通管，在取样旁通管上依次设置有流量调节阀和管柱式旋流分离器，管柱式旋流分离器顶部气相管线与气体流量计连接，管柱式旋流分离器底部与液相出口管线相连，在液相出口管线水平直管段上设置有质量流量计或油含水仪和液相流量计；所述流量计算机通过数据线分别与压力传感器、质量流量计或油含水仪和液相流量计连接。
  2. 根据权利要求1所述的油气水三相流量计，其特征在于：所述主管线上在气液两相流量计的输出端连接有差压开关阀，在差压开关阀的两端上并联连接有小口径小流量流量计，该小口径小流量流量计通过数据线与流量计算机连接。
  3. 根据权利要求2所述的油气水三相流量计，其特征在于：所述小口径小流量流量计为节流式流量计、速度式流量计或超声波式流量计。
  4. 根据权利要求1所述的油气水三相流量计，其特征在于：所述管柱式旋流分离器的容积与压力之积小于2.5MpaL，所述质量流量计的传感器外壳设置为水平方向。
  5. 根据权利要求1所述的油气水三相流量计，其特征在于：所述取样旁通管接入管柱式旋流分离器入口A点高于液相出口管线与气相管线汇合接入盘通管线入口B点1-1000mm。
PCT/CN2017/072454 2016-02-02 2017-01-24 一种油气水三相流量计 WO2017133588A1 (zh)

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CN107664524A (zh) * 2017-09-23 2018-02-06 新疆中元天能油气科技股份有限公司 一体型涡街节流式气液两相流量计

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CN105628120A (zh) * 2016-02-02 2016-06-01 新疆中元天能油气科技股份有限公司 一种油气水三相流量计
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CN110657849A (zh) * 2019-11-13 2020-01-07 新疆中元天能油气科技股份有限公司 一种油气田流量计量系统
CN111119846A (zh) * 2020-01-03 2020-05-08 四川雷蒙斯科技有限公司 一种适用于大气量单井的含水率测量仪
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CN111982221A (zh) * 2020-09-25 2020-11-24 新疆中元天能油气科技股份有限公司 油气水测量装置及测量方法
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