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Geochemical Fluid-rock Interactions ...

Herz-Thyhsen, Ryan J.

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Geochemical Fluid-rock Interactions in Energy Systems: An Investigation of Coupled Physical and Chemical Processes in Low-permeability Rocks.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Geochemical Fluid-rock Interactions in Energy Systems: An Investigation of Coupled Physical and Chemical Processes in Low-permeability Rocks./
Author:	Herz-Thyhsen, Ryan J.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	192 p.
Notes:	Source: Dissertations Abstracts International, Volume: 81-09, Section: B.
Contained By:	Dissertations Abstracts International81-09B.
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27668359
ISBN:	9781658426701

Geochemical Fluid-rock Interactions in Energy Systems: An Investigation of Coupled Physical and Chemical Processes in Low-permeability Rocks.
Herz-Thyhsen, Ryan J.

Geochemical Fluid-rock Interactions in Energy Systems: An Investigation of Coupled Physical and Chemical Processes in Low-permeability Rocks. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 192 p.

Source: Dissertations Abstracts International, Volume: 81-09, Section: B.

Thesis (Ph.D.)--University of Wyoming, 2019.

This item must not be sold to any third party vendors.

In both natural and engineered systems, fluids are often in geochemical disequilibrium with the surrounding rocks. In this context, low-permeability rocks (tight rocks) have become a focus of attention because they inhibit fluid flow in the earth's crust. These rocks can harbor large amounts of thermal energy as hydrocarbons or heat, and they act as seals for storage reservoirs. Recovering energy in these rocks requires increasing permeability to enhance fluid flow while storing waste and fluids requires maintenance of naturally low permeability. We engineer hydraulic fracturing in the subsurface to produce hydrocarbons from unconventional reservoirs of oil and gas. However, hydraulic fracturing is a controversial process that uses large volumes of water and has been linked with harmful effects to the environment. To assess the efficiency, safety, and usability of hydraulic fracturing, processes that govern the fate of fluids must be understood at a quantitative level. This dissertation investigates coupled chemical and physical alteration during interaction between engineered fluids and low-permeability rocks to better understand how these processes affect fluid storage and transport. Chapter 2 characterizes both hydraulic fracturing fluids (HFF) and two different rocks that harbor unconventional reservoirs of hydrocarbons. The collected rock and fluid data are used to develop numerical simulations that predict mineral dissolution and precipitation reactions that may occur during hydraulic fracturing. Chapter 3 reports findings of hydrothermal experiments that use rocks and fluids evaluated in Chapter 2 and gives insight into mineral dissolution and precipitation reactions that occur during hydraulic fracturing. Chapter 4 investigates these reactions at the interface between fractures and the rock surrounding stimulated fractures. This interface is important because water moves into the rock surrounding fractures before hydrocarbons pass through this area of rock during hydrocarbon production. Findings of Chapter 4 suggest that that mineral dissolution and precipitation occurs at the nanoscale in a reaction halo surrounding stimulated fractures. Chapter 5 presents results of a novel technology used to assess the geometry and nanoscale porosity of rocks after interaction with hydraulic fracturing fluids. Results suggest that rock alteration at the nanoscale is crucial for understanding the behavior of fluids in low-permeability rocks.

ISBN: 9781658426701Subjects--Topical Terms:

516570
Geology.
Subjects--Index Terms:

Energy systems

Geochemical Fluid-rock Interactions in Energy Systems: An Investigation of Coupled Physical and Chemical Processes in Low-permeability Rocks.
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300 $a 192 p.
500 $a Source: Dissertations Abstracts International, Volume: 81-09, Section: B.
500 $a Includes supplementary digital materials.
500 $a Advisor: Kaszuba, John P.
502 $a Thesis (Ph.D.)--University of Wyoming, 2019.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a In both natural and engineered systems, fluids are often in geochemical disequilibrium with the surrounding rocks. In this context, low-permeability rocks (tight rocks) have become a focus of attention because they inhibit fluid flow in the earth's crust. These rocks can harbor large amounts of thermal energy as hydrocarbons or heat, and they act as seals for storage reservoirs. Recovering energy in these rocks requires increasing permeability to enhance fluid flow while storing waste and fluids requires maintenance of naturally low permeability. We engineer hydraulic fracturing in the subsurface to produce hydrocarbons from unconventional reservoirs of oil and gas. However, hydraulic fracturing is a controversial process that uses large volumes of water and has been linked with harmful effects to the environment. To assess the efficiency, safety, and usability of hydraulic fracturing, processes that govern the fate of fluids must be understood at a quantitative level. This dissertation investigates coupled chemical and physical alteration during interaction between engineered fluids and low-permeability rocks to better understand how these processes affect fluid storage and transport. Chapter 2 characterizes both hydraulic fracturing fluids (HFF) and two different rocks that harbor unconventional reservoirs of hydrocarbons. The collected rock and fluid data are used to develop numerical simulations that predict mineral dissolution and precipitation reactions that may occur during hydraulic fracturing. Chapter 3 reports findings of hydrothermal experiments that use rocks and fluids evaluated in Chapter 2 and gives insight into mineral dissolution and precipitation reactions that occur during hydraulic fracturing. Chapter 4 investigates these reactions at the interface between fractures and the rock surrounding stimulated fractures. This interface is important because water moves into the rock surrounding fractures before hydrocarbons pass through this area of rock during hydrocarbon production. Findings of Chapter 4 suggest that that mineral dissolution and precipitation occurs at the nanoscale in a reaction halo surrounding stimulated fractures. Chapter 5 presents results of a novel technology used to assess the geometry and nanoscale porosity of rocks after interaction with hydraulic fracturing fluids. Results suggest that rock alteration at the nanoscale is crucial for understanding the behavior of fluids in low-permeability rocks.
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650 4 $a Geochemistry. $3 539092
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