Review of Downhole Wireless Communication Techniques

Arsalan, Muhammad; Ahmad, Talha; Noui‐Mehidi, Mohamed N.

doi:10.2118/171706-ms

Cited by 18 publications

(2 citation statements)

References 4 publications

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“…However, in deep well applications, the installation of wired connections from the downhole to the surface results in expensive initial costs, complex operations, and difficulties in later maintenance. On the other hand, wireless communication avoids the difficulty and high costs associated with constructing wired communication infrastructure in complex downhole environments [6]. Wireless systems can be flexibly modified and possess high portability, allowing for adaptation to different application environments.…”

Section: Overview Of Lwd Telemetry Systemmentioning

confidence: 99%

A Review of Communication Technologies in Mud Pulse Telemetry Systems

Li,

2023

Electronics

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Mastering real-time and accurate downhole information is crucial for ensuring drilling safety, improving drilling efficiency, and maximizing economic benefits. In recent years, logging while drilling (LWD) technologies, represented by mud pulse telemetry (MPT), achieved significant success. However, they still face challenges such as a large amount of downhole information conflicting with low information transmission rates, severe channel distortion, strong noise interference, and weak surface receiving signals. Therefore, this review collects and updates the papers, patents, and conference articles in the relevant field over the past ten years. Starting from the basic structure of communication systems, the downhole signal coding and modulation technologies of the MPT system are discussed. The attenuation reflection brought by the mud channel and various noise interferences in the system are described. The surface noise cancellation, channel equalization, synchronization, and decoding are studied in detail. By analyzing the theoretical principles, development breakthroughs, and relevant challenges that can improve the development of LWD technologies, this review aims to assist researchers in the field in obtaining the latest references and strategies.

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Section: Overview Of Lwd Telemetry Systemmentioning

confidence: 99%

A Review of Communication Technologies in Mud Pulse Telemetry Systems

Li,

2023

Electronics

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“…Similar downhole parameter monitoring solutions all require the use of cables for information transmission which is costly and requires higher process requirements for wellhead sealing [1,[8][9][10]. Therefore, the development of wireless monitoring technology for the downhole parameter has been paid more and more attention by the industry [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Wireless Monitoring of Downhole Pressure Based on Tubing Transmission

et al. 2023

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Downhole pressure is an important parameter for evaluating the production status of production wells. A wireless monitoring system was designed for downhole pressure which consists of two parts, i.e., the downhole tool and the wellhead tool. The tubing was used as the information transmission medium between the two parts. The downhole tool includes four pressure sensors, and the measured results will be applied to the tubing in the form of an alternating voltage with a frequency of 2.5 Hz. The amplitude of the alternating voltage output by the downhole tool is related to the magnitude of the downhole pressure. The wellhead tool measures and decodes the signal uploaded through the tubing, and the decoded result will be transmitted to the host computer through the ground cable. The wireless transmission model of downhole pressure in the production well was equivalent to a resistance network. Simulation analysis indicates that the amplitude of the signal received by the wellhead tool is negatively correlated with the downhole depth of the downhole tool and positively correlated with the formation resistivity. The designed wireless monitoring system for downhole pressure was tested in gas-producing wells in southwestern China. The test results verified the stability and reliability of the system for downhole pressure monitoring. It also confirmed that the strength of the received signal at the wellhead is negatively correlated with the downhole depth of the downhole tool for the first time and is not affected by the structure of the wellbore. The wireless monitoring scheme of downhole pressure introduced in this paper can be extended and applied to the monitoring of other downhole parameters such as temperature.

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