WO2014015802A1 - 湿气流量测量方法及其装置 - Google Patents

湿气流量测量方法及其装置 Download PDF

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Publication number
WO2014015802A1
WO2014015802A1 PCT/CN2013/080004 CN2013080004W WO2014015802A1 WO 2014015802 A1 WO2014015802 A1 WO 2014015802A1 CN 2013080004 W CN2013080004 W CN 2013080004W WO 2014015802 A1 WO2014015802 A1 WO 2014015802A1
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Prior art keywords
gas
flow rate
moisture
cross
gvf
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PCT/CN2013/080004
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English (en)
French (fr)
Inventor
陈继革
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兰州海默科技股份有限公司
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Priority claimed from CN 201210257891 external-priority patent/CN102749111B/zh
Priority claimed from CN 201220360533 external-priority patent/CN202748069U/zh
Application filed by 兰州海默科技股份有限公司 filed Critical 兰州海默科技股份有限公司
Priority to US14/416,265 priority Critical patent/US10077997B2/en
Priority to EP13823679.9A priority patent/EP2878934B1/en
Publication of WO2014015802A1 publication Critical patent/WO2014015802A1/zh

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • G01F3/30Wet gas-meters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/363Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction with electrical or electro-mechanical indication
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/74Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/86Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
    • G01F1/88Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure with differential-pressure measurement to determine the volume flow

Definitions

  • the present invention relates to the field of measurement, and in particular to a method and apparatus for measuring moisture flow. Background technique
  • Moisture refers to natural gas whose content of liquid hydrocarbons, water vapor, free water and other components is significantly higher than that required for pipeline transportation.
  • moisture metering exists in various processes from single well mining to multi-well gathering, purification treatment, and pressurized transportation. The data of moisture measurement helps to grasp the production capacity and production status of gas wells, and is the main basis for optimizing production and improving gas reservoir management.
  • the separation metering method uses a separator to separate the moisture fluid into two single-phase fluids, gas and liquid, and then separately measures the gas flow and the liquid flow at the respective outlets.
  • the separation effect of the separator on moisture is poor, and the phenomenon of gas running and liquid running out of the gas makes the error of the measurement result relatively large.
  • the structure and process of the separator are complicated, the system maintenance and management are complicated, and there are many links that need to be controlled, resulting in high operation and maintenance costs, which is not conducive to automation of production process management.
  • the online measurement method for moisture non-separation has two development directions.
  • the first development direction is to use single-phase gas metering instruments (such as Coriolis mass flowmeter, inner cone flowmeter, orifice flowmeter, turbine flowmeter, ultrasonic Flowmeters, venturi flowmeters, vortex flowmeters, etc.) measure moisture, and at the same time commit research and development to establish various empirical models to find out the "correction factor," and correct the measurement results to obtain the so-called gas flow rate.
  • the measurement method of liquid flow rate generally adopts sampling method or tracer method.
  • FIG. 1 depicts an on-line metering scheme in the prior art, wherein the differential pressure type flow measuring device 2 measures the moisture in the pipeline 1.
  • the total flow pressure difference value, a phase fraction meter 3 disposed on the pipe 1 measures the cross-sectional gas content of the moisture in the pipe 1, and the flow rate calculation module 4 according to the total flow pressure difference of the moisture and the gas content of the cross-section, Calculate gas volume flow rate (3 ⁇ 4 and liquid volume flow rate Q le
  • phase-rate meter Since only one phase-rate meter is provided on the pipe 1, and the phase-rate meter itself has drift (such as the counting drift of the gamma phase-division meter), a measurement error is generated, and the cross-section of the moisture in the pipe cannot be included. The gas rate is accurately measured.
  • the technical problem to be solved by the present invention is to provide a method for measuring moisture flow rate and a device thereof, which can detect the cross-sectional gas content of moisture in a pipeline through a redundant phase fraction meter, thereby allowing a gas volume flow rate Q g and a liquid. Accurate measurement of volumetric flow rate meets the requirements of oil and gas field production measurement, which contributes to reservoir management improvement and production optimization.
  • a method of measuring a moisture flow rate comprising the steps of:
  • the differential pressure flow measuring device measures the total flow pressure difference ⁇ of the moisture in the pipeline; at least two phase fraction meters respectively measure the cross-sectional gas content of the moisture in the pipeline; and the flow calculation module according to the at least two phase fractions
  • the cross-sectional gas content measured separately is measured to obtain the cross-sectional gas content optimization value GVF.
  • Pt The flow calculation module is based on the total flow pressure difference ⁇ of the moisture and the cross-sectional gas content optimization value GVF.
  • a moisture flow measuring device comprising a pipe, a differential pressure flow measuring device, at least two phase fractions And a flow calculation module, wherein the differential pressure flow measuring device and the at least two phase fraction meter are respectively installed on the pipeline, wherein:
  • Differential pressure flow measuring device for measuring the total flow pressure difference of moisture in a pipeline
  • the at least two phase fraction meters are configured to respectively measure a cross-sectional gas content of moisture in the pipeline;
  • a flow calculation module configured to calculate a cross-sectional gas content optimization value GVF according to the cross-sectional gas content measured by the at least two phase fraction meters. Pt ; and according to the total flow pressure difference ⁇ ⁇ of the moisture and the cross-sectional gas content optimization value GVF. Pt , calculate gas volume flow rate (3 ⁇ 4 and liquid volume flow rate Q le
  • the invention measures the total flow pressure difference ⁇ of the moisture in the pipeline by the differential pressure flow measuring device; at least two phase fraction meters respectively measure the cross-sectional gas content of the moisture in the pipeline, and the flow calculation module according to the at least two The gas fraction of the cross section measured by the phase difference meter is obtained, and the optimum gas value of the cross section is obtained.
  • the flow calculation module calculates the gas volume flow rate Q g and the liquid volume flow rate Q le according to the total flow pressure difference ⁇ of the moisture and the cross-sectional gas content optimization value GVF opt
  • the rate meter detects the cross-section gas content of the moisture in the pipeline, so that the gas volume flow rate (3 ⁇ 4 and liquid volume flow rate can be accurately measured to meet the requirements of oil and gas field production measurement, which contributes to reservoir management improvement and production optimization.
  • 1 is a schematic view of a moisture flow measurement scheme in the prior art.
  • 2 is a schematic view of an embodiment of a method for measuring moisture flow rate according to the present invention.
  • Figure 3 is a schematic illustration of one embodiment of calculating a gas volumetric flow rate and a liquid volumetric flow rate in accordance with the present invention.
  • FIG. 4 is a schematic diagram of an embodiment of calculating an optimized value of a gas fraction of a section according to the present invention.
  • Fig. 5 is a schematic view showing another embodiment of the method for measuring moisture flow rate according to the present invention.
  • Fig. 6 is a schematic view showing an embodiment of a moisture flow measuring device of the present invention.
  • Fig. 7 is a schematic view showing another embodiment of the moisture flow measuring device of the present invention.
  • Fig. 8 is a schematic view showing an embodiment of horizontal installation of a moisture flow measuring device of the present invention.
  • Fig. 9 is a schematic view showing an embodiment of the vertical installation of the moisture flow measuring device of the present invention. detailed description
  • FIG. 2 is a schematic view of an embodiment of a method for measuring moisture flow rate according to the present invention. As shown in FIG. 2, the moisture flow measurement method of this embodiment is as follows:
  • Step 201 the differential pressure flow measuring device measures the total flow pressure difference ⁇ of the moisture in the pipeline.
  • Step 202 The at least two phase fraction meters respectively measure the cross-sectional gas content of the moisture in the pipeline.
  • Step 203 The flow rate calculation module obtains a cross-sectional gas content optimization value GVF according to the cross-sectional gas content measured by the at least two phase ratio meters. Pt .
  • Step 204 The flow calculation module is configured according to the total flow pressure difference ⁇ of the moisture and the cross-sectional gas content optimization value GVF. Pt , calculate gas volume flow rate (3 ⁇ 4 and liquid volume flow rate Q le
  • the method for measuring moisture flow rate according to the above embodiment of the present invention, by differential pressure
  • the flow measuring device measures the total flow pressure difference ⁇ of the moisture in the pipeline, and the at least two phase fraction meter respectively measure the cross-sectional gas content of the moisture in the pipeline, and the flow calculating module respectively according to the at least two phase fractions
  • the measured gas fraction of the cross section is obtained as the optimum gas content of the cross section.
  • the flow calculation module is based on the total flow pressure difference ⁇ of the moisture and the cross-sectional gas content optimization value GVF.
  • the axes of the at least two phase fraction meters respectively intersect the axial direction of the pipe and are perpendicular. Since the axes of each of the phase division meters respectively intersect the axial direction of the pipe and are vertical, the accuracy of the measurement results can be further ensured.
  • the gas volume flow rate Q g and the liquid volume flow rate Q le can be calculated using the method shown in FIG. 3 .
  • the method steps shown in FIG. 3 are only one.
  • those skilled in the art can perform calculations in other alternative ways.
  • the method steps of calculating the gas volume flow rate and the liquid volume flow rate of the present invention are as follows:
  • Step 301 according to the cross-sectional gas content optimization value GVF.
  • Pt calculate the mixing density of moisture.
  • Step 302 calculating a total volumetric flow rate Q of the moisture according to the total flow pressure difference ⁇ of the moisture and the mixing density p mix of the moisture.
  • Step 303 based on the total volume flow rate Q and the section gas content optimization value GVF. Pt , calculate the gas volume flow rate ( ⁇ and liquid volume flow rate Q le
  • step 301 a formula is available
  • the flow rate calculation module may calculate the cross-sectional gas content optimization value GVF by averaging the cross-sectional gas fractions respectively measured by the at least two phase fraction meters by means of averaging. Pt .
  • calculations can be performed using methods such as calculating an arithmetic mean, a geometric mean, and a root mean square.
  • the flow calculation module may further calculate the sectional gas content optimization value GVF by using the calculated weighted average value shown in FIG. 4 . Pt .
  • Figure 4 is a schematic illustration of an embodiment of the present invention for calculating an optimized value of a gas fraction of a section using a weighted average. As shown in Figure 4, the method for calculating the optimum gas fraction of the section includes the following steps:
  • Step 401 Calculate a short-term local reliability function F( ) of the cross-sectional gas fraction measured by each phase fraction meter,
  • this parameter is a coefficient representing the weight, which can be given different weights according to the specific experimental conditions, and the optimal weight value can be found through trial and error.
  • 0 ⁇ m ⁇ Ml i M is the number of gas fractions of the cross section included in the time series, and ⁇ represents the mth cross-sectional gas fraction in the time series of the gas fraction of the cross section measured by the first phase fraction meter.
  • Step 403 constructing a comprehensive reliability function NICE by using a short-term local reliability function F( ) and a long-term overall reliability function / ) for the cross-sectional gas fraction measured by each phase fraction meter, wherein
  • step 404 the cross-sectional gas content optimization value GVF is obtained by using the comprehensive reliability function NICE. Pt , where
  • Pt [ ⁇ represents the cross-section gas content optimization value GVF.
  • the integrated reliability function NICE, is used as the weight.
  • the method steps shown in FIG. 4 are only one specific example, and those skilled in the art may perform calculations in other alternative manners.
  • the weight can be obtained in other ways, and the form of the weight is not limited thereto, and the signal corresponding to the signal with higher signal quality has a larger weight.
  • Fig. 5 is a schematic view showing another embodiment of the method for measuring moisture flow rate according to the present invention. And figure In the embodiment shown in FIG. 5, in the embodiment shown in FIG. 5, after the gas volume flow rate (3 ⁇ 4 and the liquid volume flow rate) is calculated in step 204, the gas volume flow rate (3 ⁇ 4 and liquid volume flow rate is further included). The rate is step 501 of performing slip correction.
  • a gas-liquid ring flow-slip accurate analytical solution algorithm is used to correct the gas flow rate and the liquid volume flow rate ( ⁇ ).
  • the specifics are as follows:
  • Step 501 the slip correction module corrects the gas volume flow rate (3 ⁇ 4 and the liquid volume flow rate to obtain the corrected gas volume flow rate 0' ⁇ and the liquid volume flow rate Q.
  • the solution commonly used in the prior art is to use the experimental data to fit and correct the gas flow rate and the liquid flow rate, but
  • the disadvantage of the correction is that the empirical model has a strong dependence on the experimental data and measurement conditions, and it is impossible to achieve both versatility and precision.
  • step 203 can also adopt the embodiment shown in FIG. 4, and step 204 can also adopt the embodiment shown in FIG. 3.
  • Fig. 6 is a schematic view showing an embodiment of a moisture flow measuring device of the present invention.
  • the moisture flow measuring device of this embodiment includes a pipe 601, a differential pressure flow measuring device 602, at least two phase dividing rate meters 603, and a flow rate calculating module 604, wherein the differential pressure type flow measuring device 602 And the at least two phase fraction meters 603 are respectively installed on the pipeline, wherein:
  • Pipe 601 used to transfer moisture.
  • Differential pressure flow measuring device 602 used to measure the total flow pressure difference ⁇ of moisture in the pipeline.
  • the at least two phase fractionation meters 603 are used to separately measure the cross-sectional gas content of the moisture in the pipeline.
  • the flow calculation module 604 is configured to calculate a cross-sectional gas content optimization value GVF according to the cross-sectional gas content measured by the at least two phase ratio meters 603. Pt ; and according to the total flow pressure difference ⁇ ⁇ of the moisture and the cross-sectional gas content optimization value GVF. Pt , calculate the gas volume flow rate ( ⁇ and liquid volume flow rate Q le
  • the total flow pressure difference ⁇ of the moisture in the pipeline is measured by the differential pressure flow measuring device, and at least two phase fraction meters respectively measure the cross section of the moisture in the pipeline.
  • the gas flow rate calculation module obtains a cross-sectional gas content optimization value GVF according to the cross-sectional gas content measured by the at least two phase fraction ratio meters. Pt , the flow calculation module is based on the total flow pressure difference ⁇ of the moisture and the cross-sectional gas content optimization value GVF.
  • the axes of the at least two phase fraction meters respectively intersect the axial direction of the pipe and are perpendicular. Since the axes of each of the phase division meters respectively intersect the axial direction of the pipe and are vertical, the accuracy of the measurement results can be further ensured.
  • the at least two phase fraction meters may be mounted on the same cross section of the pipe or may be mounted on different cross sections of the pipe.
  • the flow calculation module 604 calculates the mixing density of the moisture according to the cross-sectional gas content optimization value GVF opt , and calculates the moisture according to the total flow pressure difference ⁇ of the moisture and the mixed density of the moisture 3 ⁇ 4 ⁇ .
  • the total volume flow rate Q based on the total volume flow rate Q and the section gas content optimization value GVF. Pt , calculate gas volume flow rate Q g and liquid volume flow rate Q le
  • the flow calculation module 604 specifically uses a formula
  • the flow calculation module 604 specifically uses the formula
  • the flow rate calculation module 604 can calculate the cross-sectional gas content optimization value GVF by averaging the cross-sectional gas fractions respectively measured by the at least two phase fraction meters by means of averaging. Pt .
  • calculations can be performed using methods such as calculating an arithmetic mean, a geometric mean, and a root mean square.
  • the flow calculation module 604 can also calculate the cross-sectional gas content optimization value GVF by calculating a weighted average value. Pt .
  • the flow calculation module 604 specifically calculates the short-term local reliability function of the cross-sectional gas fraction measured by each phase fraction meter.
  • the flow calculation module 604 specifically measures the cross-sectional gas fraction of each phase fraction meter, and constructs a long-term overall reliability function F(), wherein
  • this parameter is a coefficient representing the weight, which can be given different weights according to the specific experimental conditions, and the optimal weight value can be found through trial and error.
  • 0 ⁇ m ⁇ Ml i M is the number of gas fractions of the cross section included in the time series, and ⁇ represents the mth cross-sectional gas fraction in the time series of the gas fraction of the cross section measured by the first phase fraction meter.
  • the flow calculation module 604 specifically uses the short-term local reliability function F( ) and the long-term overall reliability function F( ) to measure the gas fraction of the section measured by each phase fraction meter.
  • the flow calculation module 604 specifically obtains the cross-sectional gas content optimization value GVF by using the comprehensive reliability function NICE. Pt , where
  • Pt [ ⁇ represents the cross-section gas content optimization value GVF. The first in the time series of pt m optimized values.
  • Fig. 7 is a schematic view showing another embodiment of the moisture flow measuring device of the present invention.
  • the apparatus further comprises a flow measuring moisture slip correction module 701, for the gas volume flow rate Q g and the liquid volume flow rate corrected to obtain ' ⁇ and the liquid volume after the correction Flow rate Q
  • the radius of the phase gas column, 7? is the radius of the pipe
  • + is the viscosity ratio of the gas-liquid two phase
  • S is the gas content in the ring-fog flow gas core, which is the gas content of the pipe section.
  • 83 ⁇ 4 is nearly 1, it indicates that the wet gas flow state is Gas-liquid annular flow model.
  • takes a value from d to 1, which can be selected empirically by those skilled in the art.
  • the moisture flow measuring device can be installed horizontally or vertically.
  • Figure 8 is a schematic illustration of one embodiment of horizontal installation of a moisture flow measuring device of the present invention.
  • arrows indicate the direction of moisture flow
  • reference numeral 801 denotes a pipe
  • reference numeral 802 denotes a differential pressure type flow measuring device
  • reference numeral 803 denotes a phase difference meter, and for the sake of simplicity, only the Two phase fractions.
  • Figure 9 is a schematic view showing an embodiment of the vertical installation of the moisture flow measuring device of the present invention.
  • arrows indicate the direction of moisture flow
  • reference numeral 901 indicates a pipe
  • reference numeral 902 indicates a differential pressure.
  • a flow measuring device, reference numeral 903 denotes a phase dividing meter, and for the sake of brevity, only two phase dividing meters are shown here.
  • a pressure transmitter and a temperature transmitter are also installed on the pipeline for separately measuring the pressure and temperature within the pipeline, thereby further contributing to the improvement of reservoir management and production optimization.

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  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

一种湿气流量测量方法,其中,差压式流量测量器件测量管道中湿气的总流量差压值ΔΡ(201),至少两个相分率计分别测量管道中湿气的截面含气率(202),流量计算模块根据至少两个相分率计分别测量的截面含气率,得到截面含气率优化值GVFopt(203),流量计算模块根据湿气的总流量差压值AP和截面含气率优化值GVFopt,计算气体积流量率Qg和液体积流量率Q1(204)。由于通过冗余的相分率计检测管道中湿气的截面含气率,从而可以对气体积流量率Qg和液体积流量率Q1进行精确的测量,满足油气田生产计量的要求,有助于油气藏管理改善和生产优化。还提出了一种湿气流量测量装置。

Description

湿气流量测量方法及其装置 技术领域
本发明涉及测量领域, 特别是涉及一种湿气流量测量方法及 其装置。 背景技术
湿气是指液态烃、 水蒸气、 游离水等组分的含量显著高于管 道输送要求的天然气。 在气田开采过程中, 湿气计量存在于从单 井开采到多井集输、 净化处理、 增压输送的各个过程中。 湿气计 量的数据有助于掌握气井生产能力、 生产状况, 是优化生产和改 善气藏管理的主要依据。
目前业内通用的湿气计量技术主要有两类, 一类为分离计量 法, 一类为不分离在线计量法。
分离计量法是使用分离器将湿气流体分离为气和液两种单相 流体, 然后在各自的出口分别进行气流量和液流量的计量。 但是 分离器对湿气的分离效果差, 气路跑液和液路跑气的现象使得计 量结果的误差比较大。 其次, 分离器的结构和流程复杂, ***维 护和管理繁杂, 需要控制的环节较多, 因而导致运行维护费用高, 不利于实现生产过程管理的自动化。
湿气的不分离在线计量方法有两个发展方向, 第一个发展方 向是使用单相气体计量仪表 (如科氏力质量流量计, 内锥流量计, 孔板流量计, 涡轮流量计, 超声流量计, 文丘里流量计, 涡街流 量计等)对湿气进行计量, 同时致力于研究发展建立各种经验模 型找出 "修正系数,,, 对计量结果进行修正, 得到所谓的气流量率 值, 在这种湿气计量方法中, 液流量率的计量手段一般采用取样 法或示踪法。 但是这种方法的局限性以及所面临的挑战主要有以 下几点:
( 1 )气流量率 "修正系数,,的适用范围有限且依赖于液流量率, 但是液流量率的测量方式决定了其精度不够高甚至很差;
( 2 )该气流量率"修正系数"方法仅限于极高含气率、 液相成 分极低的湿气, 随着湿气中液相的成分增多, 该方法的误差是难 以接受的。
第二个发展方向是沿用或改造多相流在线计量技术来进行湿 气计量, 图 1描述了现有技术中的一种在线计量方案, 其中差压 式流量测量器件 2测量管道 1中湿气的总流量压差值, 设置在管 道 1上的一个相分率计 3测量管道 1中湿气的截面含气率, 流量 计算模块 4根据湿气的总流量压差值和截面含气率, 计算气体积 流量率(¾和液体积流量率 Qle
由于在管道 1上仅设置有一个相分率计, 而相分率计自身存 在漂移(如伽马相分率计的计数漂移), 因此会产生计量误差, 无 法对管道中湿气的截面含气率进行精确计量。 发明内容
本发明要解决的技术问题是提供一种湿气流量测量方法及其 装置, 通过冗余的相分率计检测管道中湿气的截面含气率, 从而 可以对气体积流量率 Qg和液体积流量率 进行精确的测量, 满 足油气田生产计量的要求, 有助于油气藏管理改善和生产优化。
根据本发明的一个方面, 提供了一种湿气流量测量方法, 包 括以下步骤:
差压式流量测量器件测量管道中湿气的总流量压差值 ΔΡ; 至少两个相分率计分别测量管道中湿气的截面含气率; 流量计算模块根据所述至少两个相分率计分别测量的截面含 气率, 得到截面含气率优化值 GVF。pt; 流量计算模块根据所述湿气的总流量压差值 ΔΡ 和所述截面 含气率优化值 GVF。pt,计算气体积流量率(¾和液体积流量率 Qle 根据本发明的另一方面, 提供了一种湿气流量测量装置, 包 括管道、 差压式流量测量器件、 至少两个相分率计、 和流量计算 模块, 其中差压式流量测量器件和所述至少两个相分率计分别安 装在管道上, 其中:
管道, 用于传送湿气;
差压式流量测量器件, 用于测量管道中湿气的总流量压差值
ΔΡ;
所述至少两个相分率计, 用于分别测量管道中湿气的截面含 气率;
流量计算模块, 用于根据所述至少两个相分率计分别测量的 截面含气率, 计算截面含气率优化值 GVF。pt; 并根据所述湿气的 总流量压差值 ΔΡ和所述截面含气率优化值 GVF。pt, 计算气体积 流量率(¾和液体积流量率 Qle
本发明通过差压式流量测量器件测量管道中湿气的总流量压 差值 ΔΡ; 至少两个相分率计分别测量管道中湿气的截面含气率, 流量计算模块根据所述至少两个相分率计分别测量的截面含气 率, 得到截面含气率优化值 GVF。pt, 流量计算模块根据所述湿气 的总流量压差值 ΔΡ和所述截面含气率优化值 GVFopt, 计算气体 积流量率 Qg和液体积流量率 Qle 由于通过冗余的相分率计检测 管道中湿气的截面含气率,从而可以对气体积流量率(¾和液体积 流量率 进行精确的测量, 满足油气田生产计量的要求, 有助于 油气藏管理改善和生产优化。 附图说明
图 1为现有技术中湿气流量测量方案的示意图 图 2为本发明湿气流量测量方法一个实施例的示意图。
图 3为本发明计算气体积流量率和液体积流量率一个实施例 的示意图。
图 4为本发明计算截面含气率优化值一个实施例的示意图。 图 5为本发明湿气流量测量方法另一实施例的示意图。
图 6为本发明湿气流量测量装置一个实施例的示意图。
图 7为本发明湿气流量测量装置另一实施例的示意图。
图 8为本发明湿气流量测量装置水平安装一个实施例的示意 图。
图 9为本发明湿气流量测量装置垂直安装一个实施例的示意 图。 具体实施方式
下面参照附图对本发明进行更全面的描述, 其中说明本发明 的示例性实施例。
图 2为本发明湿气流量测量方法一个实施例的示意图。 如图 2所示, 该实施方式的湿气流量测量方法如下:
步骤 201, 差压式流量测量器件测量管道中湿气的总流量压 差值 ΔΡ。
步骤 202, 至少两个相分率计分别测量管道中湿气的截面含 气率。
步骤 203, 流量计算模块根据所述至少两个相分率计分别测 量的截面含气率, 得到截面含气率优化值 GVF。pt
步骤 204, 流量计算模块根据所述湿气的总流量压差值 ΔΡ和 所述截面含气率优化值 GVF。pt, 计算气体积流量率(¾和液体积 流量率 Qle
根据本发明上述实施例提供的湿气流量测量方法, 通过差压 式流量测量器件测量管道中湿气的总流量压差值 ΔΡ, 至少两个相 分率计分别测量管道中湿气的截面含气率, 流量计算模块根据所 述至少两个相分率计分别测量的截面含气率, 得到截面含气率优 化值 GVF。pt, 流量计算模块根据所述湿气的总流量压差值 ΔΡ和 所述截面含气率优化值 GVF。pt, 计算气体积流量率(¾和液体积 流量率 Qle 由于通过冗余的相分率计检测管道中湿气的截面含气 率, 从而可以对气体积流量率(¾和液体积流量率 进行精确的 测量, 满足油气田生产计量的要求, 有助于油气藏管理改善和生 产优化。
优选的, 所述至少两个相分率计的轴线分别与管道的轴向相 交且垂直。 由于每个相分率计的轴线分别与管道的轴向相交且垂 直, 因此能够进一步确保测量结果的精度。
优选的, 在上述步骤 204中, 可使用图 3所示的方法计算气 体积流量率 Qg和液体积流量率 Qle 本领域技术人员可以了解的 是, 图 3所示的方法步骤仅为一种具体示例, 本领域技术人员可 采用其它可替换的方式进行计算。 如图 3所示, 本发明计算气体 积流量率和液体积流量率的方法步骤如下:
步骤 301, 根据所述截面含气率优化值 GVF。pt, 计算湿气的 混合密度 。
步骤 302, 根据湿气的总流量压差值 ΔΡ以及湿气的混合密度 pmix, 计算湿气的总体积流量率 Q。
步骤 303,根据总体积流量率 Q和截面含气率优化值 GVF。pt, 计算气体积流量率(^和液体积流量率 Qle
优选的, 在步骤 301中, 可利用公式
Pmix = PgaS G VFopt + Pliguidi1 - G VFopt )
计算湿气的混合密度7W X, 其中 ¾es为气体密度, Pli uid为液体 密度。 优选的, 在步骤 302中, 可利用公式
计算湿气的总体积流量率 Q, 其中参数 K为***参数。
优选的, 在步骤 303中, 可利用公式 Qg = QxGVF。pt计算气 体积流量率 Qg; 利用公式 = Qx ( 1 - GVFopt )计算液体积流量 率 Qi。
本领域技术人员可以了解的是, 上述步骤 301-303 中采用的 具体公式仅为一种具体示例, 本领域技术人员可采用其它可替换 的方式进行计算。
在上述步骤 203中, 流量计算模块可利用求平均值的方法, 通过对上述至少两个相分率计分别测量的截面含气率求平均, 来 计算截面含气率优化值 GVF。pt。 例如, 可使用计算算术平均值、 几何平均值、 均方根平均值等方法进行计算。
优选的, 在步骤 203中, 流量计算模块还可以采用图 4所示 的计算加权平均值的方式来计算截面含气率优化值 GVF。pt
图 4为本发明利用加权平均值计算截面含气率优化值一个实 施例的示意图。 如图 4所示, 计算截面含气率优化值的方法包括 如下步骤:
步骤 401, 计算每个相分率计测量的截面含气率 的短期局 部可靠度函数 F( ),
F(.X, ) = D(Xt ) = E([Xt― E(Xt )f ),
其中 表示第 i个相分率计测量的截面含气率的时间序列,1 < < N, N为相分率计的个数, D( )为方差函数, E( )为期望函 数。
步骤 402, 为每个相分率计测量的截面含气率; ^构造长期整 体可靠度函数 F( ), 其中 ^.[0] = ,.[0],
Si [m] = aSj [w-l] + (l- a)Xi [m],
LF(Si) = D(Si)i
其中 0≤ct≤l, 此参数是为一个表示权重的系数, 可根据具 体实验条件赋予不同的权重,并可经过试错法找出最优权重值。 0 <m≤M-li M为时间序列中包括的截面含气率个数, ^表示 第 /个相分率计测量的截面含气率的时间序列中的第 m个截面含 气率。
步骤 403, 利用短期局部可靠度函数 F( )和长期整体可靠度 函数/ )为每个相分率计测量的截面含气率 构造综合可靠度 函数 NICE , 其中
NICE{Xt) =
' FiX^ + LFiS,
步骤 404,利用综合可靠度函数 NICE )得到截面含气率优化 值 GVF。pt, 其中
rvj7 「 , ∑: ,[m]N/CE( ,)
GVF [m] = ,
Figure imgf000008_0001
GVF。pt [^表示截面含气率优化值 GVF。pt的时间序列中的第 m个优化值。
本领域技术人员可以了解的是, 在该具体实施例中, 将综合 可靠度函数 NICE、 )作为权值。
本领域技术人员可以了解的是, 图 4所示的方法步骤仅为一 种具体示例,本领域技术人员可采用其它可替换的方式进行计算。 例如, 在进行加权平均计算时, 可采用其它方式获得权值, 权值 的形式也不限于此, 同时, 信号质量较高的信号所对应的权值也 较大。
图 5为本发明湿气流量测量方法另一实施例的示意图。 与图 2所示实施例相比, 在图 5所示的实施例中, 在步骤 204中计算 得到气体积流量率(¾和液体积流量率 后, 进一步包括对气体 积流量率(¾和液体积流量率 进行滑差修正的步骤 501。
优选的, 使用一种气液环雾状流滑差精确解析解算法对气体 积流量率 和液体积流量率(^进行滑差修正。 具体如下:
步骤 501, 滑差修正模块对气体积流量率(¾和液体积流量率 进行修正, 以获得修正后的气体积流量率 0'§和液体积流量率 Q 其
Figure imgf000009_0001
(l - GWopt + Slip * GWopt)
Figure imgf000009_0002
其中滑差因子 为
Figure imgf000009_0003
其中 εε [ί/, 1] , d = ex(r2/R2) , r为气相气柱的半径, 7?为管道 的半径, = -^ + ΐ, Α为气液两相的粘度比, s为环-雾状流气 芯中的含气率, 为管道截面含气率。 此公式中, 当 ε趋近 时, 表明湿气流型流态为没有液膜的纯雾状流, 气液不存在滑差, S=l, 当 8¾近1时, 表明湿气流型流态为气液环状流模型。 当湿 气流型流态介于纯雾状流和气液环状流之间时, ε取从 d到 1之间 的某值, 该值可以由本领域技术人员根据经验进行选取。
由于气相和液相之间的速度差异(即滑差)会引起误差, 在 现有技术中通常采用的解决方案是利用实验数据进行拟合, 对气 流量率和液流量率进行修正, 但这种修正的缺点是经验模型对实 验数据和测量条件的依赖性很强, 无法做到通用性和精度兼顾。 利用本发明给出的滑差修正方法, 即气液环雾状流滑差精确解析 解, 通过对气体积流量率 Qg和液体积流量率 进行修正, 可以 克服现有技术中的缺陷, 进一步提高测量的精度。
优选的, 在图 5所示实施例中, 步骤 203也可采用图 4所示 的实施例, 步骤 204也可采用图 3所示的实施例。
图 6为本发明湿气流量测量装置一个实施例的示意图。 如图 6所示,该实施方式的湿气流量测量装置包括管道 601、差压式流 量测量器件 602、 至少两个相分率计 603、 和流量计算模块 604, 其中差压式流量测量器件 602和所述至少两个相分率计 603分别 安装在管道上, 其中:
管道 601, 用于传送湿气。
差压式流量测量器件 602, 用于测量管道中湿气的总流量压 差值 ΔΡ。
所述至少两个相分率计 603, 用于分别测量管道中湿气的截 面含气率。
流量计算模块 604, 用于根据所述至少两个相分率计 603分 别测量的截面含气率, 计算截面含气率优化值 GVF。pt; 并根据所 述湿气的总流量压差值 ΔΡ和所述截面含气率优化值 GVF。pt, 计 算气体积流量率(^和液体积流量率 Qle
根据本发明上述实施例提供的湿气流量测量装置, 通过差压 式流量测量器件测量管道中湿气的总流量压差值 ΔΡ, 至少两个相 分率计分别测量管道中湿气的截面含气率; 流量计算模块根据所 述至少两个相分率计分别测量的截面含气率, 得到截面含气率优 化值 GVF。pt, 流量计算模块根据所述湿气的总流量压差值 ΔΡ和 所述截面含气率优化值 GVF。pt, 计算气体积流量率(¾和液体积 流量率 Qle 由于通过冗余的相分率计检测管道中湿气的截面含气 率, 从而可以对气体积流量率 Qg和液体积流量率 进行精确的 测量, 满足油气田生产计量的要求, 有助于油气藏管理改善和生 产优化。
优选的, 所述至少两个相分率计的轴线分别与管道的轴向相 交且垂直。 由于每个相分率计的轴线分别与管道的轴向相交且垂 直, 因此能够进一步确保测量结果的精度。
优选的, 所述至少两个相分率计可安装在管道的同一横截面 上, 也可安装在管道的不同横截面上。
优选的, 流量计算模块 604具体根据所述截面含气率优化值 GVFopt, 计算湿气的混合密度 , 根据湿气的总流量压差值 ΔΡ 以及湿气的混合密度¾^, 计算湿气的总体积流量率 Q, 根据总 体积流量率 Q和截面含气率优化值 GVF。pt, 计算气体积流量率 Qg和液体积流量率 Qle
优选的, 流量计算模块 604具体利用公式
Pmix = PgaS G VFopt + Pliguidi1 - G VFopt )
计算湿气的混合密度7W X, 其中 ¾es为气体密度, Pli uid为液体 密度。
流量计算模块 604具体利用公式
Figure imgf000011_0001
计算湿气的总体积流量率 Q, 其中参数 K为***参数。
优选的, 流量计算模块 604具体利用 Qg = QxGVF。pt计算气 体积流量率 Qg, 利用公式 = Qx ( 1 - GVFopt )计算液体积流量 率 Qi。
流量计算模块 604可利用求平均值的方法, 通过对上述至少 两个相分率计分别测量的截面含气率求平均, 来计算截面含气率 优化值 GVF。pt。 例如, 可使用计算算术平均值、 几何平均值、 均 方根平均值等方法进行计算。 优选的, 流量计算模块 604还可以采用计算加权平均值的方 式来计算截面含气率优化值 GVF。pt。 其中: 流量计算模块 604具 体计算每个相分率计测量的截面含气率 .的短期局部可靠度函数
F{X, ) = D(Xt ) = E([ , - E(Xt )]2 ),
其中 表示第 i个相分率计测量的截面含气率的时间序列,1 < <N, N为相分率计的个数, D()为方差函数, E()为期望函数。
流量计算模块 604具体为每个相分率计测量的截面含气率 Xi 构造长期整体可靠度函数 F(), 其中
^.[0] = ,.[0],
St [m] = aSj [w-l] + (l- a)Xi [m],
LF(Si) = D(Si)i
其中 0≤ ct≤ l, 此参数是为一个表示权重的系数, 可根据具 体实验条件赋予不同的权重,并可经过试错法找出最优权重值。 0 < m≤ M-li M为时间序列中包括的截面含气率个数, ^表示 第 /个相分率计测量的截面含气率的时间序列中的第 m个截面含 气率。
流量计算模块 604具体利用短期局部可靠度函数 F( )和长期 整体可靠度函数 F( )为每个相分率计测量的截面含气率 构造 综合可靠度函数 Λ7 (), 其中
NICE{Xt) = „
' F(X + LF(S
流量计算模块 604具体利用综合可靠度函数 NICE )得到截 面含气率优化值 GVF。pt, 其中
rvT7 「 , ∑: ,[m]N/CE( ,)
GVF [m] = ~ ,
^NICEiX,)
GVF。pt [^表示截面含气率优化值 GVF。pt的时间序列中的第 m个优化值。
图 7为本发明湿气流量测量装置另一实施例的示意图。 与图 6所示实施性相比, 湿气流量测量装置还包括滑差修正模块 701, 用于对气体积流量率 Qg和液体积流量率 进行修正, 以获得修 正后的 '§和液体积流量率 Q 其中
Figure imgf000013_0001
(l - GWopt + Slip * GWopt)
Figure imgf000013_0002
其中滑差因子 为
Figure imgf000013_0003
相气柱的半径, 7?为管道 的半径, + 为气液两相的粘度比, S为环-雾状流气 芯中的含气率, 为管道截面含气率。 此公式中, 当 ε趋近 时, 表明湿气流型流态为没有液膜的纯雾状流, 气液不存在滑差, S=l, 当 8¾近1时, 表明湿气流型流态为气液环状流模型。 当湿 气流流型流态介于纯雾状流和气液环状流之间时, ε取从 d到 1 之间的某值, 该值可以由本领域技术人员根据经验进行选取。
优选的, 湿气流量测量装置可水平安装或垂直安装。 图 8为 本发明湿气流量测量装置水平安装一个实施例的示意图。 在图 8 中, 箭头代表湿气流动方向, 附图标记 801表示管道, 附图标记 802表示差压式流量测量器件, 附图标记 803表示相分率计, 为 了简便起见, 这里仅示出了两个相分率计。 图 9为本发明湿气流 量测量装置垂直安装一个实施例的示意图。 在图 9中, 箭头代表 湿气流动方向, 附图标记 901表示管道, 附图标记 902表示差压 式流量测量器件, 附图标记 903表示相分率计, 同样为了简便起 见, 这里也仅示出了两个相分率计。
优选的, 在管道上还安装压力变送器和温度变送器, 用于分 别测量管道内的压力和温度, 从而进一步有助于油气藏管理的改 善和生产优化。
本发明的描述是为了示例和描述起见而给出的, 而并不是无 遗漏的或者将本发明限于所公开的形式。 很多修改和变化对于本 领域的普通技术人员而言是显然的。 选择和描述实施例是为了更 好说明本发明的原理和实际应用, 并且使本领域的普通技术人员 能够理解本发明从而设计适于特定用途的带有各种修改的各种实 施例。

Claims

权 利 要 求
1. 一种湿气流量测量方法, 其特征在于, 包括以下步骤: 差压式流量测量器件测量管道中湿气的总流量压差值 ΔΡ; 至少两个相分率计分别测量管道中湿气的截面含气率; 流量计算模块根据所述至少两个相分率计分别测量的截面含 气率, 得到截面含气率优化值 GVF。pt;
流量计算模块根据所述湿气的总流量压差值 ΔΡ 和所述截面 含气率优化值 GVF。pt,计算气体积流量率(¾和液体积流量率 Qle
2. 根据权利要求 1所述的方法, 其特征在于,
所述至少两个相分率计的轴线分别与管道的轴向相交且垂 直。
3. 根据权利要求 2所述的方法, 其特征在于,
在所述流量计算模块根据所述湿气的总流量压差值 ΔΡ 和所 述截面含气率优化值 GVF。pt计算气体积流量率 Qg和液体积流量 率(^之后, 还包括:
滑差修正模块对气体积流量率 Qg和液体积流量率 进行修 正, 以获得修正后的气体积流量率 0'§和液体积流量率 Q 其中
^ ,
(l-GW。pt + Slip*GW。pt)
0. Qg*siip
8 (l-GVFopt+Slip*GVFopt) '
其中滑差因子 S/ 为 相气柱的半径, 7?为管道 的半径, = -^ + ΐ, 为气液两相的粘度比, s为环-雾状流气 芯中的含气率, d为管道截面含气率。
4. 根据权利要求 1-3中任一项所述的方法, 其特征在于, 所述流量计算模块根据所述至少两个相分率计分别测量的截 面含气率得到截面含气率优化值 GVF。pt的步骤包括:
流量计算模块通过计算所述至少两个相分率计分别测量的截 面含气率的算术平均值, 得到截面含气率优化值 GVFopte
5. 根据权利要求 1-3中任一项所述的方法, 其特征在于, 所述流量计算模块根据所述至少两个相分率计分别测量的截 面含气率得到截面含气率优化值 GVF。pt的步骤包括:
计算每个相分率计测量的截面含气率 的短期局部可靠度函 数 F(),
F{X, ) = D(Xt ) = E([ , - E(Xt )]2 ),
其中 表示第 i个相分率计测量的截面含气率的时间序列,1 < <N, N为相分率计的个数, D()为方差函数, E()为期望函数; 为每个相分率计测量的截面含气率 构造长期整体可靠度函 数 LF(), 其中
^.[0] = ,.[0],
St [m] = aSj [w-l] + (l- a)Xi [m],
LF(Si) = D(Si)i 其中 0≤α≤1, 0 < /w < M-l , Μ为时间序列中包括的截面含 气率个数, [ 表示第 /个相分率计测量的截面含气率的时间序 列中的第 / w个截面含气率;
利用短期局部可靠度函数 F( )和长期整体可靠度函数 LF\ ) 为每个相分率计测量的截面含气率 构造综合可靠度函数
NICE{ ), 其中
NICE{Xt) = ,
' FiX^ + LFiS,
利用综合可靠度函数 NICE^ )得到截面含气率优化值
GVFopt, 其中
rvT7 m]N/CE( ,)
GVF 「 [m, ∑: , [
] = ~ ,
GVF。pt [^表示截面含气率优化值 GVF。pt的时间序列中的第 m个优化值。
6. 根据权利要求 1-3中任一项所述的方法, 其特征在于, 所述流量计算模块根据所述湿气的总流量压差值 ΔΡ 和所述 截面含气率优化值 GVF。pt计算气体积流量率(¾和液体积流量率
(^的步骤包括以下步骤:
根据所述截面含气率优化值 GVF。pt, 计算湿气的混合密度
Pmix,
根据湿气的总流量压差值 ΔΡ以及湿气的混合密度 , 计算 湿气的总体积流量率 Q;
根据总体积流量率 Q和截面含气率优化值 GVF。pt,计算气体 积流量率(¾和液体积流量率 Qle 根据权利要求 6所述的方法, 其特征在于, 所述根据所述截面含气率优化值 GVF。pt计算湿气的混合密 度 的步骤包括:
利用公式
Pmix = Pgas G VFopl +
Figure imgf000018_0001
- G VF opt )
计算湿气的混合密度¾^, 其中 为气体密度, pliquid为液体 密度。
8. 根据权利要求 6所述的方法, 其特征在于,
所述根据湿气的总流量压差值 ΔΡ以及湿气的混合密度 计 算湿气的总体积流量率 Q的步骤包括:
Figure imgf000018_0002
计算湿气的总体积流量率 Q, 其中参数 K为***参数。
9. 根据权利要求 6所述的方法, 其特征在于,
所述根据总体积流量率 Q和截面含气率优化值 GVF。pt计算 气体积流量率(^和液体积流量率 的步骤包括:
利用公式 Qg = QxGVF。pt计算气体积流量率 Qg;
利用公式(^ = Qx ( 1 - GVFopt )计算液体积流量率 Qle
10. —种湿气流量测量装置, 包括管道、 差压式流量测量器 件、 至少两个相分率计、 和流量计算模块, 其中差压式流量测量 器件和所述至少两个相分率计分别安装在管道上, 其中:
管道, 用于传送湿气;
差压式流量测量器件, 用于测量管道中湿气的总流量压差值
ΔΡ; 所述至少两个相分率计, 用于分别测量管道中湿气的截面含 气率;
流量计算模块, 用于根据所述至少两个相分率计分别测量的 截面含气率, 计算截面含气率优化值 GVF。pt; 并根据所述湿气的 总流量压差值 ΔΡ和所述截面含气率优化值 GVF。pt, 计算气体积 流量率(¾和液体积流量率 Qle
11. 根据权利要求 10所述的装置, 其特征在于, 所述至少两 个相分率计的轴线与管道的轴向相交且垂直。
12. 根据权利要求 11所述的装置, 其特征在于, 湿气流量测 量装置还包括滑差修正模块,用于对气体积流量率 Qg和液体积流 量率 进行修正, 以获得修正后的气体积流量率 Q'g和液体积流 量率 Q 其中
(l-GWopt + Slip*GWopt)
Figure imgf000019_0001
其中滑差因子 为
Figure imgf000019_0002
其中 εε[ί/, 1], d=ex(r2/R2), r为气相气柱的半径, 7?为管道 的半径, = -^ + ΐ, Α为气液两相的粘度比, s为环-雾状流气 芯中的含气率, d为管道截面含气率。
13.根据权利要求 10-12中任一项所述的装置, 其特征在于, 流量计算模块具体通过计算所述至少两个相分率计分别测量 的截面含气率的算术平均值, 得到截面含气率优化值 GVF。pt
14.根据权利要求 10-12中任一项所述的装置, 其特征在于, 流量计算模块具体计算每个相分率计测量的截面含气率 Xi 的短期局部可靠度函数 F( ),
F{X, ) = D(Xt ) = E([ , - E(Xt )]2 ),
其中 表示第 i个相分率计测量的截面含气率的时间序列,1 < <N, N为相分率计的个数, D()为方差函数, E()为期望函数; 流量计算模块具体为每个相分率计测量的截面含气率 构造 长期整体可靠度函数 F(), 其中
^.[0] = ,.[0],
St [m] = aSj [w-l] + (l- a)Xi [m],
LF(Si) = D(Si)i
其中 0≤α≤1, 0</w<M-l, M为时间序列中包括的截面含 气率个数, [ 表示第 /个相分率计测量的截面含气率的时间序 列中的第 / w个截面含气率;
流量计算模块具体利用短期局部可靠度函数^ )和长期整体 可靠度函数 LF\ )为每个相分率计测量的截面含气率 构造综合 可靠度函数 V/ ^(), 其中
NICE{Xt) = ,
' F(X + LF(S
流量计算模块具体利用综合可靠度函数 NICE、 )得到截面含 气率优化值 GVF。pt, 其中
rvT7 「 , ∑: ,[m]N/CE( ,)
GVF [m] = ~ ,
^NICEiX,)
GVF。pt [^表示截面含气率优化值 GVF。pt的时间序列中的第 m个优化值。
15.根据权利要求 10-12中任一项所述的装置, 其特征在于, 流量计算模块具体根据所述截面含气率优化值 GVF。pt, 计算 湿气的混合密度^ x; 根据湿气的总流量压差值 ΔΡ以及湿气的混 合密度 ^, 计算湿气的总体积流量率 Q; 根据总体积流量率 Q 和截面含气率优化值 GVF。pt, 计算气体积流量率 Qg和液体积流 量率 Qle
16. 根据权利要求 15所述的装置, 其特征在于,
流量计算模块具体利用公式
Pmix = PgasG VFopt + PliguiA1 - G VFopt )
计算湿气的混合密度7W X, 其中 ¾es为气体密度, Pli uid为液体 密度。
17. 根据权利要求 15所述的装置, 其特征在于,
模块具体利用公式
Figure imgf000021_0001
计算湿气的总体积流量率 Q, 其中参数 K为***参数。
18. 根据权利要求 15所述的装置, 其特征在于,
流量计算模块具体利用公式 Qg = Qx GVFopt计算气体积流量 率 Qg, 利用公式 = Qx ( 1 - GVFopt )计算液体积流量率 Qle
19. 根据权利要求 10-12中任一项所述的装置, 其特征在于, 所述至少两个相分率计安装在管道的同一横截面上。
20. 根据权利要求 10-12中任一项所述的装置, 其特征在于, 所述至少两个相分率计安装在管道的不同横截面上。
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