The Gothic shale of the Pennsylvanian Paradox Formation Greater Aneth Field (Aneth Unit) Southeastern Utah U.S.A.: Seal for Hydrocarbons and Carbon Dioxide Storage.

Heath, Jason E.; Dewers, Thomas; Chidsey, Thomas C.; Carney, Stephanie M.; Bereskin, S. Robert

doi:10.2172/1367407

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Upon examining lithologic logs (7.13), the seals are most likely due to porosity differences and interbedded shales, namely the Gothic Shale. A petrophysical study by Heath et al (2017) was completed in the Greater Aneth Field examining the lithologic properties of the homogenous Gothic Shale. Heath et al (2017) report the pressure decay permeability of the Gothic Shale is ~1.4E-04 mD.…”

Section: Ratherford Field San Juan County Utahmentioning

confidence: 99%

Isotopic Analyses of Helium From Wells Located in the Four Corners Area, southwestern, Us

Halford¹

2019

Geological Society of America Abstracts With Programs

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Helium, the lightest noble gas, is a valuable resource located on the Colorado Plateau southwestern US. Helium, a proven, useful noble gas, has many applications in modern technology for its chemical, physical, and thermodynamic properties. As of this writing, the price of crude helium is ~40% greater than CH 4 , rendering the economic grade for direct and secondary extraction at 0.3% helium. The helium systems in the Four Corners area (i.e., the study area) are characterized utilizing the geochemistry of noble gases, hydrocarbons, and nonhydrocarbons (compositional and isotopic), as well as geologic mapping. The geochemistry delineates sources of gases, migration pathways, and potential trapping/sealing mechanisms of the helium system, which is a slight deviation from the petroleum system. Economic helium (>0.3%) is primarily found in Paleozoic intervals structurally trapped on the Four Corners Platform, the edge of the Defiance Uplift, and the edge of the Holbrook Basin. Thirty-one gas samples, isotopically analyzed, are from actively producing Paleozoic formations within five fields: Tocito Dome, Dineh-Bi-Keyah, Ratherford, Pinta Dome, and Navajo Springs. Helium concentrations range from 0.01% to >6.0% and incorporates a spectrum of other gas values associated with relatively similar Paleozoic formations.

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Section: Ratherford Field San Juan County Utahmentioning

confidence: 99%

Isotopic Analyses of Helium From Wells Located in the Four Corners Area, southwestern, Us

Halford¹

2019

Geological Society of America Abstracts With Programs

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“…The Paradox Formation salt deposits and related subsurface structures include distinctive salt walls that reach up to 4,500 m (Figure 1). These salt formations, which have historically acted as effective cap rocks for fossil fuels, hold great promise for trapping and storing CO 2 (Heath et al, 2017;Warwick et al, 2022). An extensive surface normal fault system was mapped in the middle and northern parts of the basin.…”

Section: Introductionmentioning

confidence: 99%

Stress Field Dynamics and Fault Slip Potential in the Paradox Basin

Dvory,

McLennan

2024

JGR Solid Earth

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The Paradox Basin, straddling Utah, Colorado, Arizona, and New Mexico is characterized by an intricate amalgamation of evaporites and clastic layers and is dominated by prominent salt walls and related subsurface structures. Our research offers a new examination of the stress distribution across the basin, deriving from continuous and discrete stress measurements conducted in boreholes in the region and focal mechanism analysis, emphasizing variations over salt structures. Integrating Coulomb failure criteria with probabilistic methods, we assess potential fault movements resulting from fluid pressure alterations. Our approach provides a comprehensive understanding of the Paradox Basin's state of stress, showing a continuous change of the maximum horizontal stress orientation from N‐S at the Wasatch Fault Zone to WNW‐ESE in the northern part of the Paradox Basin and to WSW‐ENE in the southern part of the basin. Further East, into the Colorado Plateau and the Uncompahgre Uplift, the SHmax orientation becomes E‐W. Decoding stress orientation dynamics has enabled critical insights into fault slip potential, especially in the basin's northern region. The salt wall faults are less likely to slip, and the Paradox Formation's evaporite and clastic rock sequence can serve as a potential low seismic risk target for carbon storage and hydrocarbon extraction.

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