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14.1 Groundwater and Aquifers – Physical Geology

14.1 Groundwater and Aquifers. Groundwater is stored in the open spaces within rocks and within unconsolidated sediments. Rocks and sediments near the surface are under less pressure than those at significant depth and therefore tend to have more open …

Simulation of the impact of faults on CO2 injection into ...

2013-4-8 · We examine the impact of faults on the flow of fluid‐phase CO 2 injected into formation water in sandstone reservoirs. We estimate the permeability for a range of faults and show that low‐permeability deformation‐band faults may impede CO 2 flow and increase the volume ratio of CO 2 stored in a compartmentalized reservoir. Conversely, fracture‐dominated faults act as bypass conduits ...

Friedmann

2014-6-9 · sandstone and carbonate reservoirs capped by an impermeable layer, unconventional shales are fine-grained, organic rich, sedimentary rocks where the host rock is not just a hydrocarbon container, but also the source of the oil or gas. 13. Because thermogenic natural gas deposits vary

Chapter 4 Engineering Classification of Rock Materials

Table 4–13 Fracture type 4–21 Table 4–14 Fracturing density description chart 4–21 Table 4–15 Joint set spacing categories 4–22 Table 4–16 Aperture category 4–23 Table 4–17 Joint infilling 4–24 Table 4–18 Joint persistence categories 4–25 Table 4–19 Types of joint ends 4–25 Table 4–20 Descriptors for weathering condition of joint face rock 4–27

STATE OF UTAH DEPARTMENT OF NATURAL RESOURCES

2009-11-30 · test drilling, infiltration studies of the Navajo Sandstone, and miscellaneous measurements of streamflow at selected sites. Analyses in the office included computation of aquifer coefficients for the Navajo Sandstone (Hood and Danielson, 1979), and evaluation of the infiltration studies of the Navajo Sandstone and digital modeling of the

(PDF) Mechanical Parameters Controlling Sandstone ...

Fracture conductivity: this is effectively the permeability of the hydraulic fracture Half length: this parameter impacts the extent of the hydraulic fracture, therefore the amount of matrix that ...

Formation of conical fractures in sedimentary basins ...

Large sand intrusions often exhibit conical morphologies analogous to magmatic intrusions such as saucer-shaped or cup-shaped sills. Whereas some physical processes may be similar, we show with scaled experiments that the formation of conical sand intrusions may be favoured by the pore-pressure gradients prevailing in the host rock before sand injection.

Fracture behavior and damage mechanisms of sandstone ...

2020-7-1 · For current, quite limited investigation related to the impact of cyclic wetting-drying on fracture toughness of rock materials can be referred to. Wen et al.,, studied the fracture behavior of sandstone exposed to wetting-drying cycles by using central cracked Brazilian disc (CCBD) methods. They concluded that both the fracture toughness and ...

RI0234D. Geologic Controls on Reservoir Properties ...

Hydraulic Fracture Microseismic Monitoring ... Log responses and rock properties in core from the Second and Third Frontier, SFE No. 4, Chimney Butte field. ... Schematic map showing traces of dominantly north-striking vertical fractures on sandstone. bedding …

Hydraulic conductivity of rock fractures (Technical Report ...

1994-10-1 · A clear understanding of the hydraulic conductivity of fractures has been identified as an important scientific problem that must be addressed during the site characterization process. The problem of the flow of a single-phase fluid through a rough-walled rock fracture is discussed within the context of rigorous fluid mechanics.

The Horizontal Directional Drilling Process

2015-8-6 · Downhole mechanical cutting action required for harder soils is provided by downhole hydraulic motors. Downhole hydraulic motors, commonly referred to as mud motors, convert hydraulic energy from drilling mud pumped from the surface to mechanical energy at the bit. This allows for bit rotation without drill string rotation.

Formation of conical fractures in sedimentary basins ...

 · Large sand intrusions often exhibit conical morphologies analogous to magmatic intrusions such as saucer-shaped or cup-shaped sills. Whereas some physical processes may be similar, we show with scaled experiments that the formation of conical sand intrusions may be favoured by the pore-pressure gradients prevailing in the host rock before sand injection.

Hydraulic Conductivity

2016-6-13 · Slabbing/spalling and rockburst are unconventional types of failure of hard rocks under conditions of unloading and various dynamic loads in environments with high and complex initial stresses. In this study, the failure behaviors of different rock types (granite, red sandstone, and cement mortar) were investigated using a novel testing system coupled to true-triaxial static loads and local ...

Wellbore stability analysis in porous carbonate rocks ...

2014-5-15 · Wellbore stability analysis in porous carbonate rocks using cap models L. C. Coelho1, A. C. Soares2, N. F. F. Ebecken1, J. L. D. Alves1 & L. Landau1 1COPPE/Federal University of Rio de Janeiro, Brazil 2Petrobras Research Center, Brazil Abstract It is well established that hydrocarbon wellbores fail under tension mode or shear

Hydraulic properties and scale effects investigation in ...

2004-4-27 · This paper reports on the characterization of hydraulic properties of regional rock aquifers carried out within a groundwater resources assessment project in the St. Lawrence Lowlands of south-western Quebec. To understand the aquifer behavior at both the fracture level and at field scale, hydraulic investigations were carried out using various aquifer tests. The groundwater flow at the local ...

Coupled hydro-mechanical evolution of fracture ...

2021-11-7 · The increase of fluid mixture pressure in the basal sandstone formation results in vertical fracturing and growth in Mode I failure. Shear bands develop in the fracture branch in the upper inclined dyke zone in a mixed mode of shear-tension failure. Q. Gan et al. / Journal of Rock Mechanics and Geotechnical Engineering 12 (2020) 742e751 743

Southern North Sea Tight Gas

fracture, the barriers to fracture growth, the fracture dimensions, and orientation, the proppant, fluid rheology, and clean up requirements, and a suitable execution plan and associated costs. The role of analytical and numeric simulation in evaluating the well productivity and reserve recovery of hydraulic stimulated wells was explained.

A Novel Semi-Analytical Model for Multi-branched …

2018-8-2 · Fractured-vuggy rock with complex pore structures has been widely studied by many countries 1,2,3,4,5,6,7,8,9.Well test analysis in hydraulically fractured wells has been a …

21 Breakage functions for each rock at reduction ratio 1 ...

Donovan (2003) found that fracture toughness, as a mechanical rock property, has a close link to crushing energy consumption in jaw crushers. Djordjevic et al. (2003) performed simulations for the ...

Relaxation damage control via fatigue-hydraulic fracturing ...

2021-3-24 · Hydraulic-fracture design at depth of 410 m at Äspö HRL, Sweden. (a) A hydraulic-testing borehole (diameter: 102 mm; length: 28 m) is diamond-drilled …

Porosity and Bulk Density of Sedimentary Rocks

2012-7-25 · contains miscellaneous notes from the cited sources that may be useful in evaluating the porosity and bulk density data. The tabulations indicate that the porosity of sandstone generally but not invariably decreases and the bulk density increases with depth of burial, age, degree of tectonic disburbance, and departure

Horizontal-Stress Directions in the Denver and Illinois ...

2010-12-12 · the wall rock, resulting in enlargement (breakout) of the well bore in the direction of minimum horizontal stress (Sh). Using dipmeter and fracture identification well-log data, orientations of borehole breakouts were determined for selected wells in the Denver and Illinois Basins. Directions

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2021-9-9 · 1981.9-1986.7,1986.10-1991.2,(Ph.D.)1991.2-1993.4,1993.4-1993.11 ...

Evaluation of Successful MTBE Remediation in the …

2004-12-8 · An average hydraulic conductivity value 8.16 feet per day was calculated from the slug tests. Due to the interconnectivity of the fractures, these results are similar to a granular porous media but are indicative of the Stockton formation. The average hydraulic conductivity value was then compared to literature (Freeze and Cherry, 1979; Fetter,

Flow-through experiments on the interaction of sandstone ...

2017-10-13 · Rock sample. This study focuses on porous media and thus the experiments are conducted with rocks of the Buntsandstein Group, which is, inter alia, one reservoir rock of the Bruchsal location (Herzberger et al. 2010).The rock samples, used for the experiments, belong to the Middle Buntsandstein that consists of the Eck-formation Horizon, the Bausandstein-formation, and the general conglomerate ...

Physical Geology CH17 Groundwater Flashcards | Quizlet

Start studying Physical Geology CH17 Groundwater. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

FRACTURE-TRACE ANALYSIS FOR WATER-WELL SITE …

2012-6-22 · FRACTURE-TRACE ANALYSIS FOR WATER-WELL SITE LOCATIONS MISCELLANEOUS PAPER · 83-5 IN PRECAMBRIAN IGNEOUS AND METAMORPHIC ROCK IN CENTRAL WISCONSIN by B.J.Socha available from Geological and Natural History Survey University of Wisconsin-Extension 1815 Un iversity Avenue Madison, Wisconsin 53705,

Testing of rock climbing anchors in weak sandstone ...

2014-7-22 · Climbers sometimes rely on fixed anchors which are secured in drilled holes by mechanical expansion or with glue. Most rock climbing takes place on high strength rock and there has been considerable testing of anchors worldwide. However, there …

2020-5-4 · ,.,,.,, ...

Shale Anisotropy and Natural Hydraulic Fracture ...

2020-2-5 · 1 Introduction. Hydraulic fracturing in shale is important for the sealing capacity of shale layers during natural (Foschi et al., 2018; Petrie et al., 2014) and artificial (Elkhoury et al., 2015) fluid-expulsion events.The mechanical anisotropy of shale is evident from its fissility in hand samples, from abundant examples of layer-parallel natural fractures hosted in shales worldwide (Cobbold ...

Mechanical Properties of Intact Rock and Fractures in ...

2012-1-21 · Therefore, the mechanical and hydraulic properties of intact rock and jointed rock are needed. To obtain the required mechanical properties of intact rock and rock joints, it is necessary to measure the properties in the field or laboratory tests. Triaxial compression and shear tests are commonly used for