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You searched for subject:(Dielectric tools). Showing records 1 – 3 of 3 total matches.

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University of Houston

1. -5056-1485. Frequency Limitation for Triaxial Induction Tools and Dielectric Tools in 1-D Multi-Layered Transverse Isotropic Formation.

Degree: MSin Electrical Engineering, Electrical Engineering, 2016, University of Houston

Triaxial induction tools are used in well logging to efficiently measure formation anisotropy including reservoir rocks that show anisotropy, such as thin laminated reservoirs. Dielectric tools are mainly used to detect fresh water and carbonate. They are vital in distinguishing thinly laminated shale oil/gas detection. Dielectric tools have higher working frequency than triaxial induction tools. In this thesis, an analytical method is used to simulate the responses of triaxial induction tools in one-dimensional multi-layered transverse isotropic formation with both the borehole and invasions neglected. Dielectric tools have the same basic formulations as triaxial induction tools except there only have two directions. Given the wide use of dielectric tools in the industry, having a simulation method that can simulate dielectric tools with speed and accuracy is important. Thus, frequency limitation for the simulation method is studied in this thesis to determine if this simulation method can simulate dielectric tools. Advisors/Committee Members: Jackson, David R. (advisor), Chen, Ji (committee member), Chen, Jiefu (committee member), Benhaddou, Driss (committee member).

Subjects/Keywords: Triaxial induction tools; Dielectric tools; Simualte

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APA (6th Edition):

-5056-1485. (2016). Frequency Limitation for Triaxial Induction Tools and Dielectric Tools in 1-D Multi-Layered Transverse Isotropic Formation. (Masters Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/3260

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Author name may be incomplete

Chicago Manual of Style (16th Edition):

-5056-1485. “Frequency Limitation for Triaxial Induction Tools and Dielectric Tools in 1-D Multi-Layered Transverse Isotropic Formation.” 2016. Masters Thesis, University of Houston. Accessed November 26, 2020. http://hdl.handle.net/10657/3260.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7th Edition):

-5056-1485. “Frequency Limitation for Triaxial Induction Tools and Dielectric Tools in 1-D Multi-Layered Transverse Isotropic Formation.” 2016. Web. 26 Nov 2020.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-5056-1485. Frequency Limitation for Triaxial Induction Tools and Dielectric Tools in 1-D Multi-Layered Transverse Isotropic Formation. [Internet] [Masters thesis]. University of Houston; 2016. [cited 2020 Nov 26]. Available from: http://hdl.handle.net/10657/3260.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-5056-1485. Frequency Limitation for Triaxial Induction Tools and Dielectric Tools in 1-D Multi-Layered Transverse Isotropic Formation. [Masters Thesis]. University of Houston; 2016. Available from: http://hdl.handle.net/10657/3260

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete


University of Houston

2. Lin, Chang-Ming. Study of Dielectric Constant Logging Tools.

Degree: MSin Electrical Engineering, Electrical Engineering, 2012, University of Houston

One of the important issues of well logging is to determine the water saturation from the oil bearing formation. The induction resistivity tool may finish the job if the water is fairly saline. In fresh water, the induction tool is difficult to figure out the exact water saturation and oil/gas contents. Therefore, it is crucial that there be a method to determine water saturation that is less dependent upon the knowledge of water salinity thus making it of great use in fresh water zones. Dielectric constant logging tools offer an attractive new method of formation evaluation, which is relatively independent of water salinity. In this thesis, a dipole model is developed in that it consists of three infinitesimal dipoles: one for the transmitter and the other two for the receivers. The model, then, is used to simulate the dielectric constant tool responses by measuring the amplitude ratios and phase shifts in both homogeneous and inhomogeneous layered formation. The results show a good agreement with the experimental data and theoretical results published in previous studies. Moreover, the numerical results portray that the dipole model accurately provides a decent estimation of the formation dielectric properties compared to other models. Advisors/Committee Members: Liu, Richard C. (advisor), Wilton, Donald R. (committee member), Malki, Heidar A. (committee member).

Subjects/Keywords: Well logs; Dielectric constant logging tools; Dielectric tools; Logging tools; Electrical engineering

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APA (6th Edition):

Lin, C. (2012). Study of Dielectric Constant Logging Tools. (Masters Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/764

Chicago Manual of Style (16th Edition):

Lin, Chang-Ming. “Study of Dielectric Constant Logging Tools.” 2012. Masters Thesis, University of Houston. Accessed November 26, 2020. http://hdl.handle.net/10657/764.

MLA Handbook (7th Edition):

Lin, Chang-Ming. “Study of Dielectric Constant Logging Tools.” 2012. Web. 26 Nov 2020.

Vancouver:

Lin C. Study of Dielectric Constant Logging Tools. [Internet] [Masters thesis]. University of Houston; 2012. [cited 2020 Nov 26]. Available from: http://hdl.handle.net/10657/764.

Council of Science Editors:

Lin C. Study of Dielectric Constant Logging Tools. [Masters Thesis]. University of Houston; 2012. Available from: http://hdl.handle.net/10657/764

3. Zhang, Yinxi. Study of Dielectric Tools and Dielectric Property of Rocks.

Degree: PhD, Electrical Engineering, 2014, University of Houston

Dielectric tools have mainly been used for identifying freshwater zones in oil- or gas-bearing formations. New-generation dielectric tools are also used for detecting shale reservoirs, heavy oil, and residue oil in invasion zones. However, currently commercialized tools either lack information on frequency dispersive behavior or offer redundant logging curves. This dissertation investigates both the design and simulation of novel array dielectric tools; meanwhile, it throws light on the dielectric properties of rocks through lab measurements. A multi-component, multi-spacing array dielectric tool working at 5 different frequencies in the range of 10 MHz to 1 GHz was studied. It covered the frequency gap between propagation tools and conventional dielectric tools. Tool sensitivity was carefully investigated to demonstrate tool capability in exploring formation properties, including permittivity, conductivity, dipping, and anisotropy. Meanwhile, tool simulations with COMSOL provided comprehensive evaluations of tool performance. From the simulation results, it was found that the size of the tool pad has an influence on tool response, especially when lower frequency channels are fired. However, the impact from borehole mud can be negligible since the tool is pushed against the borehole wall. Moreover, the existence of mud cakes and invasions affect the measurements and depth of investigation of the tool as well. In addition, vertical resolution was studied for different formation conditions. The designed tool was proven to be able to detect thin conductive beds or beds with high dielectric constants. In the past few decades, dielectric dispersion has been observed from core data. Practical core measurements for dielectric constant and conductivity were also conducted in this dissertation to study the dielectric properties of sediment rocks. A parallel plate system was used for the study. The relative dielectric constant and conductivity were measured in a frequency range from 10 KHz to 1GHz. Measured data agreed well with the resistivity log inversion results, and large dielectric enhancement at the induction frequencies was observed. Dielectric and conductivity corrections were applied to the original log to correct the errors caused by dielectric dispersions. The results lead to the conclusion that dielectric correction should be added to the resistivity inversion routine to avoid misinterpretation. Advisors/Committee Members: Liu, Richard C. (advisor), Wilton, Donald R. (committee member), Jackson, David R. (committee member), Holley, Thomas K. (committee member), Malki, Heidar A. (committee member).

Subjects/Keywords: Dielectric tools; Dielectric measurement

…5 Figure 1-3 Dielectric tools… …79 xiii Chapter 1 Introduction Applications of dielectric tools date back to the late… …demonstrated. During the past decade, the development of new-generation dielectric tools has hit a… …dielectric tools provides useful structural information to the log analysis. The dielectric tool is… …tools, to offer a thorough interpretation of petrophysical formation. 1.1 Dielectric Constant… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Zhang, Y. (2014). Study of Dielectric Tools and Dielectric Property of Rocks. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/1643

Chicago Manual of Style (16th Edition):

Zhang, Yinxi. “Study of Dielectric Tools and Dielectric Property of Rocks.” 2014. Doctoral Dissertation, University of Houston. Accessed November 26, 2020. http://hdl.handle.net/10657/1643.

MLA Handbook (7th Edition):

Zhang, Yinxi. “Study of Dielectric Tools and Dielectric Property of Rocks.” 2014. Web. 26 Nov 2020.

Vancouver:

Zhang Y. Study of Dielectric Tools and Dielectric Property of Rocks. [Internet] [Doctoral dissertation]. University of Houston; 2014. [cited 2020 Nov 26]. Available from: http://hdl.handle.net/10657/1643.

Council of Science Editors:

Zhang Y. Study of Dielectric Tools and Dielectric Property of Rocks. [Doctoral Dissertation]. University of Houston; 2014. Available from: http://hdl.handle.net/10657/1643

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