Normalized least-square method for water hold-up measurement in stratified oil–water flow

Xu, Wilsun; Xu, Lijun; Cao, Zhang; Chen, Jianjun; Liu, Xingbin; Hu, Jinhai

doi:10.1016/j.flowmeasinst.2012.05.002

Cited by 23 publications

(9 citation statements)

References 26 publications

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“…By contrast to the estimation method proposed in Ref. [19], the newly proposed method can work in a wider range for water level estimation, which mainly attributes to the adoption of the new normalization algorithm.…”

Section: Resultsmentioning

confidence: 99%

“…More details about the structure of the conductance-probe array and the logging tool can be found in Ref. [19].…”

Section: Conductance-probe Arraymentioning

confidence: 99%

“…In a previous paper of the authors [19], a conductance-probe array was proposed for water hold-up measurement in a working horizontal well. As the value of water hold-up uniquely relates to the water level of oil-water stratified flow, the authors proposed a leastsquare-based method to estimate the water level as well as the azimuth angle of the sensor.…”

Section: Introductionmentioning

confidence: 99%

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Multiple parameters׳ estimation in horizontal well logging using a conductance-probe array

Cao

et al. 2014

Flow Measurement and Instrumentation

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Section: Resultsmentioning

confidence: 99%

“…More details about the structure of the conductance-probe array and the logging tool can be found in Ref. [19].…”

Section: Conductance-probe Arraymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multiple parameters׳ estimation in horizontal well logging using a conductance-probe array

Cao

et al. 2014

Flow Measurement and Instrumentation

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“…Lucas and Mishra proposed a local four-sensor probe to measure the swirl influence for bubble flow in vertical pipe, and analyzed the impedance and time sequence of electronic measurement system [16]. Xu et al measured the water hold-up of stratified oilwater flow by a conductance array consisting of 24 needle-like electrodes that mounted on 12 supporting arms arising from the central shaft [17]. Zhai et al numerically designed and optimized the geometry of a ring conductance probe for measuring the conductance of oil-water mixtures in horizontal pipes [18].…”

Section: Introductionmentioning

confidence: 99%

Design of a Conductance and Capacitance Combination Sensor for water holdup measurement in oil–water two-phase flow

Tan

Dong

2015

Flow Measurement and Instrumentation

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“…Horizontal and inclined oil-in-water flows are of significant interest to the oil industry [7], [8], [9], [10], [11], [12] and [13] and the industry is also very interested in novel techniques enabling characterization of such flows .…”

Section: Introductionmentioning

confidence: 99%

Large probe arrays for measuring mean and time dependent local oil volume fraction and local oil velocity component distributions in inclined oil-in-water flows

Lucas

Zhao

2013

Flow Measurement and Instrumentation

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Arrays of dual-sensor and four-sensor needle conductance probes have been used to measure the mean and time dependent local properties of upward inclined, bubbly oil-in-water flows (also known as dispersed oil-in-water flows) in a 153mm diameter pipe. The flow properties that were measured were (i) the local in-situ oil volume fraction α ; (ii) the local oil velocity o u in the axial direction of the pipe (the Z direction); and (iii) the local oil velocity Y u in the direction from the lower side of the inclined pipe to its upper side (the Y direction). Oil velocities in the X direction (orthogonal to the Y and Z directions) were found to be negligible. For all of the flow conditions investigated it was found that the mean value of α varied from a maximum value at the upper side of the inclined pipe to a minimum value at the lower side, and that the rate of decrease of this mean value of α with distance in the Y − direction became greater as the pipe inclination angle θ from the vertical was increased. It was also found that the mean value of o u was greatest at the upper side of the inclined pipe and decreased towards the lower side of the inclined pipe, the rate of decrease with distance in the Y − direction again becoming greater as θ was increased. it was found that the standard deviation in the cross-pipe oil velocity component Y u was approximately equal to the standard deviation in the axial velocity component o u . These large temporal variations in the local flow properties have been attributed to the presence of large scale Kelvin-Helmholtz waves which intermittently appear in the flow. It is believed that the techniques outlined in this paper for measuring the standard deviation of local flow properties as a function of the sampling period T will be of considerable value in validating mathematical models of time dependent oilwater flows. It should be noted that the principal focus of this paper is on the measurement techniques that were used and the methods of data analysis rather than the presentation of exhaustive experimental results at numerous different flow conditions.

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Normalized least-square method for water hold-up measurement in stratified oil–water flow

Cited by 23 publications

References 26 publications

Multiple parameters׳ estimation in horizontal well logging using a conductance-probe array

Multiple parameters׳ estimation in horizontal well logging using a conductance-probe array

Design of a Conductance and Capacitance Combination Sensor for water holdup measurement in oil–water two-phase flow

Large probe arrays for measuring mean and time dependent local oil volume fraction and local oil velocity component distributions in inclined oil-in-water flows

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