Author

Qiming Wang

ORCID Identifier(s)

0000-0002-1886-0143

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

Comments

Degree granted by The University of Texas at Arlington

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