Manchester code telemetry system for well logging using quasi-parallel inductive-capacitive resonance

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

doi:10.1063/1.4889888

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…One of the simplest model implementations for a coaxial cable is a lumped model which is often used for transmission lines in both radio frequency (RF) applications [15] as well for well logging telemetry [16]. This model is a summary of a long chain of parasitic elements in the transmission path, derived as a per length ( ) unit.…”

Section: Methodsmentioning

confidence: 99%

A Pragmatic Approach to Dynamic Behavior in Electrical Lines Used for Well Intervention Tools

Duraij

Xiao

Zsurzsan

et al. 2020

2020 IEEE International Conference on Industrial Technology (ICIT)

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Electrical lines, also known as wirelines, are commonly used for well intervention techniques to increase flow of oil and gas wells that can be executed during a low service time. Previous studies show the importance of this electrical conductor for power delivery as well as communication purposes. Nevertheless, a validated model and its parameters of this channel are still missing. This papers outlines a geometrical approach to estimate the electrical dynamic behavior for wireline types used in the field with results supported by four different types of validation. The proposed method proves to capture the wireline dynamic behavior characteristics and is particular accurate in modeling the capacitive element within 5 %.

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Section: Methodsmentioning

confidence: 99%

A Pragmatic Approach to Dynamic Behavior in Electrical Lines Used for Well Intervention Tools

Duraij

Xiao

Zsurzsan

et al. 2020

2020 IEEE International Conference on Industrial Technology (ICIT)

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“…The measurement circuit is installed in the instrument to record the time-varying electrical characteristics of the oil-water flow; these characteristics are referred to as the original output signals of the probes. To decrease the requirement to the bandwidth of the transmission line, binary data of the output signals are uploaded to the ground through the cable connector [33]. Moreover, the centralizers A and B are installed on the two ends of the well logging instrument to keep the instrument in the center of the horizontal pipe.…”

Section: Well Logging Instrumentmentioning

confidence: 99%

Water holdup measurement of oil–water two-phase flow in a horizontal well using a dual-circle conductance probe array

Zhang

Cao

et al. 2016

Meas. Sci. Technol.

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This paper presents a minimum root-mean-square error (RMSE)-based method for a dual-circle conductance probe array to measure the water holdup of an oil-water two-phase flow in a horizontal oil well. The dual-circle conductance probe array consisting of 24 conductance probes, half of which are equidistantly distributed on a 34 mm radius inner circle and the other half on a 48 mm radius outer circle, is used to estimate the oil-water interface and hence the water holdup in the horizontal oil well. For the same water holdup, the number of probes immersed in water may vary with varying the azimuth angle due to the limited number of probes. The limited number of probes and unknown azimuth angle of the probe array in the oil well limit the measurement accuracy of the water holdup. In order to obtain a better water holdup estimate, a water holdup measurement method based on the minimum RMSE was proposed to decrease the effects of the limited number of probes and unknown azimuth angle of the probe array. To verify the proposed method, numerical simulations were carried out and compared with the commonly used equi-weight estimate method; results showed that the RMSE of the water holdup estimates obtained using the proposed method is smaller than that when using the equi-weight estimate method. Experiments were implemented in a 16 m long and 125 mm inner diameter horizontal pipe on an industrial-scale experimental multiphase flow setup in the Daqing Oil Field, China. The RMSEs of water holdup estimates obtained using the proposed and equi-weight estimate methods are 0.0632 and 0.0690, respectively, showing that the proposed method is better than the equi-weight estimate method.

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“…The Manchester code telemetry system was developed to transmit data via Manchester code, including a code transmitter, a logging cable, and a code receiver [19]. The transmitter is made up of an encoder, a bipolar pulse generator, and a push-pull driver.…”

Section: Conductance Telemetry Circuitmentioning

confidence: 99%

Water cut measurement of oil–water flow in vertical well by combining total flow rate and the response of a conductance probe

Chen

Cao

et al. 2015

Meas. Sci. Technol.

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In this paper, a conductance probe-based well logging instrument was developed and the total flow rate is combined with the response of the conductance probe to estimate the water cut of the oil–water flow in a vertical well. The conductance probe records the time-varying electrical characteristics of the oil–water flow. Linear least squares regression (LSR) and nonlinear support vector regression (SVR) were used to establish models to map the total flow rate and features extracted from the probe response onto the water cut, respectively. Principal component analysis (PCA) and partial least squares analysis (PLSA) techniques were employed to reduce data redundancy within the extracted features. An experiment was carried out in a vertical pipe with an inner diameter of 125 mm and a height of 24 m in an experimental multi-phase flow setup, Daqing Oilfield, China. In the experiment, oil–water flow was used and the total flow rate varied from 10 to 200 m3 per day and the water cut varied from 0% to 100%. As a direct comparison, the cases were also studied when the total flow rate was not used as an independent input to the models. The results obtained demonstrate that: (1) the addition of the total flow rate as an input to the regression models can greatly improve the accuracy of water cut prediction, (2) the nonlinear SVR model performs much better than the linear LSR model, and (3) for the SVR model with the total flow rate as an input, the adoption of PCA or PLSA not only decreases the dimensions of inputs, but also increases prediction accuracy. The SVR model with five PCA-treated features plus the total flow rate achieves the best performance in water cut prediction, with a coefficient of determination (R2) as high as 0.9970. The corresponding root mean squared error (RMSE) and mean quoted error (MQE) are 0.0312% and 1.99%, respectively.

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Manchester code telemetry system for well logging using quasi-parallel inductive-capacitive resonance

Cited by 6 publications

References 25 publications

A Pragmatic Approach to Dynamic Behavior in Electrical Lines Used for Well Intervention Tools

A Pragmatic Approach to Dynamic Behavior in Electrical Lines Used for Well Intervention Tools

Water holdup measurement of oil–water two-phase flow in a horizontal well using a dual-circle conductance probe array

Water cut measurement of oil–water flow in vertical well by combining total flow rate and the response of a conductance probe

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