Graduation Semester and Year
2019
Language
English
Document Type
Thesis
Degree Name
Master of Science in Earth and Environmental Science
Department
Earth and Environmental Sciences
First Advisor
Qinhong Hu
Abstract
As one of the most productive shale gas plays, the Haynesville Shale has a high geopressure gradient and high temperature, but with a lack of petrophysical understanding. To analyze the pore geometry and wettability related connectivity of this formation, multiple methods such as total organic carbon content (TOC), X-ray diffraction (XRD), vacuum saturation, mercury intrusion capillary pressure (MICP), contact angle, fluid imbibition, and helium pycnometry were used on 10 Haynesville Shale core samples from a single well over a vertical distance of 123 ft. The results from those tests show that the Haynesville Shale is calcareous shale with 2.26~5.28% of TOC. The porosities range from 3 to 8%, and the pore-throat sizes are concentrated at the nanoscale (2.8~50 nm). Moreover, the permeability and effective tortuosity of the pore network controlled by 2.8 to 50 nm pore-throat size are 3.7 to 23.4 nD and 1413 to 3433, respectively. All ten samples show strong oil-wet characteristics and only three samples exhibit mixed wettability (both oil-wet and water-wet). In general oil-wet samples show higher pore connectivity when they imbibe hydrophobic (a mixture of n-decane:toluene at 2:1, as an oil analog) than hydrophilic (deionized water) fluids.
Keywords
Haynesville shale, Nano-petrophysics
Disciplines
Earth Sciences | Physical Sciences and Mathematics
License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.
Recommended Citation
Wang, Qiming, "Nano-petrophysics study of Haynesville Shale, East Texas, USA" (2019). Earth & Environmental Sciences Theses. 151.
https://mavmatrix.uta.edu/ees_theses/151
Comments
Degree granted by The University of Texas at Arlington