Mark McClure
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View article: Enhanced geothermal systems for clean firm energy generation
Enhanced geothermal systems for clean firm energy generation Open
View article: The Egs Collab Project: Outcomes and Lessons Learned from Hydraulic Fracture Stimulations in Crystalline Rock at 1.25 and 1.5 Km Depth
The Egs Collab Project: Outcomes and Lessons Learned from Hydraulic Fracture Stimulations in Crystalline Rock at 1.25 and 1.5 Km Depth Open
View article: StageOpt technical write-up
StageOpt technical write-up Open
This document provides technical background for StageOpt. This tool helps to better understand fluid and proppant distribution between perforations and clusters within a fracturing stage. Limited entry technique is often used to achieve un…
View article: Thermoelastic fracturing and buoyancy-driven convection: Surprising sources of longevity for EGS circulation
Thermoelastic fracturing and buoyancy-driven convection: Surprising sources of longevity for EGS circulation Open
To maximize value from an EGS system, engineers need to optimize flow rate, well spacing, and well configuration. Numerical simulations yield interesting and surprising results regarding the effect of coupled processes on long term thermal…
View article: Using in-situ strain measurements to evaluate the accuracy of stress estimation procedures from fracture injection/shut-in tests
Using in-situ strain measurements to evaluate the accuracy of stress estimation procedures from fracture injection/shut-in tests Open
Fracture injection/shut-in tests are commonly used to measure the state of stress in the subsurface. Injection creates a hydraulic fracture (or in some cases, opens a preexisting fracture), and then the pressure after shut-in is monitored …
View article: A new method for interpreting well-to-well interference tests and quantifying the magnitude of production impact: Theory and applications in a multi-basin case study
A new method for interpreting well-to-well interference tests and quantifying the magnitude of production impact: Theory and applications in a multi-basin case study Open
Interference tests are used in shale reservoirs to evaluate the strength of connectivity between wells. The results inform engineering decisions about well spacing. In this paper, we propose a new procedure for interpreting interference te…
View article: A new method for interpreting well-to-well interference tests and quantifying the magnitude of production impact: Theory and applications in a multi-basin case study
A new method for interpreting well-to-well interference tests and quantifying the magnitude of production impact: Theory and applications in a multi-basin case study Open
Interference tests are used in shale reservoirs to evaluate the strength of connectivity between wells. The results inform engineering decisions about well spacing. In this paper, we propose a new procedure for interpreting interference te…
View article: Commentary on Four New DFIT Papers: (a) In-Situ Measurements from EGS Collab; (b) Comparison of Techniques at the Bedretto Project; (c) Statistical Review of 62 DFITs; and (d) An Article Advocating the Tangent Method
Commentary on Four New DFIT Papers: (a) In-Situ Measurements from EGS Collab; (b) Comparison of Techniques at the Bedretto Project; (c) Statistical Review of 62 DFITs; and (d) An Article Advocating the Tangent Method Open
This post provides commentary on recent four papers on diagnostic fracture injection testing (DFIT). The first paper uses in-situ deformation measurements to directly observe fractures opening and closing during fracture injection-falloff …
View article: Description of ResFrac automated history matching and optimization workflow
Description of ResFrac automated history matching and optimization workflow Open
This document describes the functioning of the automated history matching and optimization workflow implemented with the ResFrac hydraulic fracturing and reservoir simulator. The purpose of the automated history matching and optimization w…
View article: Description of ResFrac automated history matching and optimization\n workflow
Description of ResFrac automated history matching and optimization\n workflow Open
This document describes the functioning of the automated history matching and\noptimization workflow implemented with the ResFrac hydraulic fracturing and\nreservoir simulator. The purpose of the automated history matching and\noptimizatio…
View article: Transverse Hydraulic Fracture Initiation: Insights from Intermediate-Scale Hydraulic Fracture Tests
Transverse Hydraulic Fracture Initiation: Insights from Intermediate-Scale Hydraulic Fracture Tests Open
In a uniform stress field, a tensile hydraulic fracture will favor propagation in the plane formed by the maximum (most compressive) and intermediate principal stresses. For the propagation of hydraulic fractures in non-uniform stress fiel…
View article: Close Observation of Hydraulic Fracturing at EGS Collab Experiment 1: Fracture Trajectory, Microseismic Interpretations, and the Role of Natural Fractures
Close Observation of Hydraulic Fracturing at EGS Collab Experiment 1: Fracture Trajectory, Microseismic Interpretations, and the Role of Natural Fractures Open
Despite the wide application of hydraulic fracturing in enhanced geothermal system (EGS) development and unconventional hydrocarbon production, our understanding of the many factors affecting the propagation of hydraulic fractures has reli…
View article: Discussion of the Paper SPE-187038-MS: Fracture Closure Stress: Reexamining Field and Laboratory Experiments of Fracture Closure Using Modern Interpretation Methodologies
Discussion of the Paper SPE-187038-MS: Fracture Closure Stress: Reexamining Field and Laboratory Experiments of Fracture Closure Using Modern Interpretation Methodologies Open
In recent years, there has been discussion in the literature regarding methods of estimating the magnitude of the minimum principal stress from subsurface fracture injection tests, commonly called Diagnostic Fracture Injection Tests (DFITs…
View article: Fluid pressure drops during stimulation of segmented faults in deep geothermal reservoirs
Fluid pressure drops during stimulation of segmented faults in deep geothermal reservoirs Open
Hydraulic stimulation treatments required to produce deep geothermal reservoirs present the risk of generating induced seismicity. Understanding the processes that operate during the stimulation phase is critical for minimising and prevent…
View article: ResFrac Technical Writeup
ResFrac Technical Writeup Open
ResFrac is a combined hydraulic fracturing, reservoir, and hydraulic fracturing simulator. It describes multiphase fluid flow (black oil or compositional), proppant transport, transport of non-Newtonian fluid additives, and thermal transpo…
View article: Field observations at the Fenton Hill enhanced geothermal system test site support mixed-mechanism stimulation
Field observations at the Fenton Hill enhanced geothermal system test site support mixed-mechanism stimulation Open
View article: A suite of benchmark and challenge problems for enhanced geothermal systems
A suite of benchmark and challenge problems for enhanced geothermal systems Open
View article: An accurate and efficient method for calculating fluid exchange between fractures and matrix with a non-conforming mesh
An accurate and efficient method for calculating fluid exchange between fractures and matrix with a non-conforming mesh Open
I propose the 1D Subgrid Method for calculating fluid exchange between fractures and matrix with a non-conforming mesh. The method is demonstrated on linear and radial flow problems. The method has negligible computational cost and is accu…
View article: Outcomes from a Collaborative Approach to a Code Comparison Study for Enhanced Geothermal Systems
Outcomes from a Collaborative Approach to a Code Comparison Study for Enhanced Geothermal Systems Open
View article: Fracture and flow designs for the collab/SIGMA-V project
Fracture and flow designs for the collab/SIGMA-V project Open
View article: Benchmark Problems of the Geothermal Technologies Office Code Comparison Study
Benchmark Problems of the Geothermal Technologies Office Code Comparison Study Open
A diverse suite of numerical simulators is currently being applied to predict or understand the performance of enhanced geothermal systems (EGS). To build confidence and identify critical development needs for these analytical tools, the U…
View article: RDC volume 58 issue 4 Cover and Front matter
RDC volume 58 issue 4 Cover and Front matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Bed load proppant transport during slickwater hydraulic fracturing: insights from comparisons between published laboratory data and correlations for sediment and pipeline slurry transport
Bed load proppant transport during slickwater hydraulic fracturing: insights from comparisons between published laboratory data and correlations for sediment and pipeline slurry transport Open
Bed load transport is the movement of particles along the top of a bed through rolling, saltation, and suspension created by turbulent lift above the bed surface. In recent years, there has been a resurgence of interest in the idea that be…
View article: RDC volume 58 issue 3 Cover and Front matter
RDC volume 58 issue 3 Cover and Front matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Thermal breakthrough calculations to optimize design of a multiple-stage Enhanced Geothermal System
Thermal breakthrough calculations to optimize design of a multiple-stage Enhanced Geothermal System Open
We perform an optimization and sensitivity analysis for design of an Enhanced Geothermal System (EGS) with horizontal wells and multiple fracturing stages. The sensitivity analysis includes calculations of thermal breakthrough and the maxi…
View article: RDC volume 58 issue 2 Cover and Front matter
RDC volume 58 issue 2 Cover and Front matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Re-examining interpretations of non-ideal behavior during diagnostic fracture injection tests
Re-examining interpretations of non-ideal behavior during diagnostic fracture injection tests Open
Diagnostic fracture injection tests (DFITs) are performed in low permeability formations to estimate the minimum principal stress, formation pressure, permeability, and other parameters. G-function derivative plots are used for diagnosing …
View article: Revisiting Fenton Hill Phase I reservoir creation and stimulation mechanisms through the GTO code comparison effort
Revisiting Fenton Hill Phase I reservoir creation and stimulation mechanisms through the GTO code comparison effort Open
View article: RDC volume 58 issue 1 Cover and Front matter
RDC volume 58 issue 1 Cover and Front matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: An embedded fracture modeling framework for simulation of hydraulic fracturing and shear stimulation
An embedded fracture modeling framework for simulation of hydraulic fracturing and shear stimulation Open
A numerical modeling framework is described that is able to calculate the coupled processes of fluid flow, geomechanics, and rock failure for application to general engineering problems related to reservoir stimulation, including hydraulic…