Aquifer tests of the Navajo sandstone near Caineville, Wayne County, Utah

Hood, J.W.; Danielson, T.W.

doi:10.3133/ofr78911

Cited by 6 publications

(8 citation statements)

References 14 publications

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“…Figure 9 shows the results are similar to those of the analytic modellow to mid-range transmissivity and low storativity help to raise pore pressure. Within the estimated range of the transmissivity and storativity for the Navajo aquifer (Hood & Danielson 1979;Hood & Patterson 1984;Freethey & Cordy 1991), injection is shown to be able to raise hydraulic head more than 1 m over a region up to 10-12 km from the injection wells to account for the observed seismicity increase. (ii) T = 125 m 2 day À1 , S = 0.008; (iii) T = 400 m 2 day À1 , S = 0.0003; and (iv) T = 400 m 2 day À1 , S = 0.008.…”

Section: Pore Pressure Changes By Injectionmentioning

confidence: 92%

“…This rate of injection is three times the average injection rate in Area 3 to represent the three injection wells in Area 3's Cluster 2. We tested a range of transmissivity and storativity values based on properties of the Navajo Sandstone, which makes up the majority of the aquifer (Hood & Danielson 1979;Hood & Patterson 1984;Freethey & Cordy 1991). Figure 7A is an example graph explaining how to read the results, and Fig.…”

Section: Pore Pressure Changes By Injectionmentioning

confidence: 99%

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Injection‐induced seismicity in Carbon and Emery Counties, central Utah

Brown

Liu

2016

Geofluids

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Utah is one of the top producers of oil and natural gas in the United States. Over the past 18 years, more than 4.2 billion gallons of wastewater from the petroleum industry has been injected into the Navajo Sandstone, Kayenta Formation, and Wingate Sandstone in Carbon and Emery Counties, central Utah, where seismicity has increased during the same period. Previous studies have attributed this seismicity to coal mining. Here, we present evidence for wastewater injection being a major cause of the increased seismicity. We show that, in the coal mining area, seismicity rate increased significantly 1–5 years following the wastewater injection, and the earthquakes, mostly with magnitudes <3.0, are concentrated in areas seismically active prior to the injection. Using simple analytical and numerical models, we show that the injection in central Utah can sufficiently raise pore pressure to trigger seismicity within 10–20 km of the injection wells, and the time needed for the diffusion of pore pressure may explain the observed lag of seismicity increase behind the commencement of injection. The b‐value of these earthquakes increased following the wastewater injection, which is consistent with these events being injection‐induced. We conclude that the marked increase in seismicity rate in central Utah is induced by both mining activity and wastewater injection, which raised pore pressure along preexisting faults.

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Section: Pore Pressure Changes By Injectionmentioning

confidence: 92%

Section: Pore Pressure Changes By Injectionmentioning

confidence: 99%

Injection‐induced seismicity in Carbon and Emery Counties, central Utah

Brown

Liu

2016

Geofluids

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“…Aquifer tests were performed using the cluster of wells at site 19 in figure 6; these yielded the the most areally extensive value of hydraulic conductivity of 1.6 ft/d. Values of 0.5 ft/d were measured from Navajo Sandstone samples taken from the aquifer test wells (Hood and Danielson, 1979). In the aquifer test area a value of 0.7 ft/d was used in the model because larger values of hydraulic conductivity resulted in simulated heads around site 19 that were too large.…”

Section: Sensitivity To Hydraulic-conductivity Distributionmentioning

confidence: 99%

“…The simulated recharge from the Waterpocket fold area is 100 percent greater than estimated, and approximately 50 percent of the recharge comes from the Oak Creek area. Faults in the Oak Creek area associated with the Teasdale anticline (Hood and Danielson, 1979) probably increase surface and interformational recharge to the Navajo creating the need for the larger recharge of the simulation. Simulated recharge of 4 ft 3 /s enters the Navajo outcrop on the west side of San Rafael Swell and splits into two equal parts (see fig.…”

Section: Factorsmentioning

confidence: 99%

“…Later development near Caineville indicated that large quantities of water potentially could be obtained from the Navajo Sandstone. Approximately 3,000 gal/min came from two wells near Caineville (Hood and Danielson, 1979). This report discusses the initial aquifer simulation in the Upper Colorado River Basin Regional Aquifer-System Analysis (RASA).…”

Section: Introductionmentioning

confidence: 99%

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Ground-water flow in the Navajo sandstone in parts of Emery, Grand, Carbon, Wayne, Garfield, and Kane counties, southeast Utah

Weiss¹

1987

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Water shortages are expected in the Upper Colorado River Basin because of increasing water demands. Management of a groundwater resource can be aided by the use of digital computer models. The initial computer model of the Upper Colorado River Basin Regional Aquifer-System Analysis is the twodimensional, finite-difference, groundwater flow model discussed in this report. The aquifer that was modeled is the Navajo Sandstone of Jurassic and Triassic(?) age, which is located around San Rafael Swell and extends south to Lake Powell. This aquifer is a widely used source of ground water throughout most of the Colorado Plateau. Despite undergoing more extensive study and data collection than most aquifers in the region, it still has many unknown aspects. One of the assumptions included in the model is that the ground water is of constant density. The validity of this assumption was investigated for the area of greatest density variation; the assumption was found to create no larger change in flow than other hydrologic uncertainties in this area.

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Aquifer tests of the Navajo sandstone near Caineville, Wayne County, Utah

Cited by 6 publications

References 14 publications

Injection‐induced seismicity in Carbon and Emery Counties, central Utah

Injection‐induced seismicity in Carbon and Emery Counties, central Utah

Ground-water flow in the Navajo sandstone in parts of Emery, Grand, Carbon, Wayne, Garfield, and Kane counties, southeast Utah

Geohydrology and effects of water use in the Black Mesa area, Navajo and Hopi Indian Reservations, Arizona

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