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You searched for subject:(Lozier Canyon). Showing records 1 – 3 of 3 total matches.

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Texas A&M University

1. Gardner, Rand D. Lateral Continuity of the Eagle Ford Group Strata in Lozier Canyon and Antonio Creek, Terrell County, Texas.

Degree: MS, Geology, 2013, Texas A&M University

Understanding of the local lateral heterogeneity within the Eagle Ford Group, a prolific mudstone reservoir on the Texas Gulf Coast, is hindered by a lack of well-preserved outcrops in close proximity to one another. Misinformation or over simplistic assumptions about relevant horizontal reservoir heterogeneities can lead to sub-optimal or uneconomical exploitation. High-resolution correlation of individual beds in the Eagle Ford Group over several miles in Lozier Canyon and Antonio Creek in Terrell County, West Texas, was used to document lateral variation in thickness, composition, sedimentary structures, and gamma ray response of these strata on a local scale. Physical tracing of the beds on outcrops and within Gigapan photomosaics, hand-held spectral gamma-ray scintillometer profiles, and examination of polished hand samples and thin sections were used to correlate Eagle Ford Group strata across Lozier Canyon and Antonio Creek. The results add value by increasing the understanding of local horizontal heterogeneities and the depositional environments of Eagle Ford Group strata and potentially influencing how and where wells are drilled and completed. Five distinct lithostratigraphic units, termed A-E from the base up, and their subunits, are laterally continuous over several miles in terms of thickness, lithology, and spectral gamma ray response. However, there are notable differences in thickness and sedimentary structures in units A and B. Unit A has the largest difference in thickness (7%), suggesting higher accommodation in the southeast part of the study area. Moreover, sedimentary structures and bed morphology of skeletal packstone beds in unit B, the primary target of horizontal wells in the subsurface, vary over a 4-mi interval from discontinuous lenses to laterally continuous stacked beds. Simulated wireline logs obtained from outcrop exposures suggest that spectral gamma ray data is superior to total gamma ray data in correctly identifying the most desirable sub units for completion. Geochemical data and trace fossil abundance suggest primarily anoxic bottom water conditions during deposition of the Lower Eagle Ford Formation and oxic conditions during deposition of the Upper Eagle Ford Formation. Widespread zones of deformed bedding within the Eagle Ford Group strata typify certain units and were likely caused by paleoseismicity. Laterally extensive bedding plane exposures in Antonio Creek provide three-dimensional views of macrofossils and the bedform morphology that were previously only described from two-dimensional outcrops. Sedimentary structures suggest that units A, C, D, and E were deposited above storm wave base; and deposition of unit B was episodically above storm wave base. Advisors/Committee Members: Pope, Michael C (advisor), Donovan, Arthur (committee member), Ayers, Walter B (committee member).

Subjects/Keywords: Lozier; Canyon; Antonio; Creek; Eagle; Ford; Group; Texas; Boquillas

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Gardner, R. D. (2013). Lateral Continuity of the Eagle Ford Group Strata in Lozier Canyon and Antonio Creek, Terrell County, Texas. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151670

Chicago Manual of Style (16th Edition):

Gardner, Rand D. “Lateral Continuity of the Eagle Ford Group Strata in Lozier Canyon and Antonio Creek, Terrell County, Texas.” 2013. Masters Thesis, Texas A&M University. Accessed April 15, 2021. http://hdl.handle.net/1969.1/151670.

MLA Handbook (7th Edition):

Gardner, Rand D. “Lateral Continuity of the Eagle Ford Group Strata in Lozier Canyon and Antonio Creek, Terrell County, Texas.” 2013. Web. 15 Apr 2021.

Vancouver:

Gardner RD. Lateral Continuity of the Eagle Ford Group Strata in Lozier Canyon and Antonio Creek, Terrell County, Texas. [Internet] [Masters thesis]. Texas A&M University; 2013. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/1969.1/151670.

Council of Science Editors:

Gardner RD. Lateral Continuity of the Eagle Ford Group Strata in Lozier Canyon and Antonio Creek, Terrell County, Texas. [Masters Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151670


Texas A&M University

2. Davis, Drew Edward. Digital Outcrop Models of the Eagle Ford Group in Lozier Canyon, Terrell County, Texas.

Degree: MS, Geology, 2017, Texas A&M University

The Eagle Ford group was a prolific producer of unconventional oil and gas in south Texas during the last decade. Operators typically target the Lower Eagle Ford formation to drill horizontal wells with lateral lengths averaging nearly 1 mi (1.61 km). Geologic variability can be significant at these distances, thus an understanding of lateral variability of reservoir thicknesses, facies distributions, and fractures paired with geochemical and petrophysical data is valuable in characterizing unconventional reservoirs. High-resolution digital outcrop models (DOMs) using photogrammetry techniques provide a unique tool to study variability of Eagle Ford group strata in outcrops in Lozier Canyon in Terrell County, West Texas. Stratigraphic variability within the Eagle Ford group is well documented; however, lateral variability of Eagle Ford strata is minimally understood and is fundamental to developing this productive unconventional play. This project focuses on world-class outcrops that expose complete vertical sections of the Eagle Ford group. The study area covers a north-to-south straight line distance of 6.2 mi (10 km) allowing analysis at reservoir-scale. The average gross stratigraphic thickness of the Eagle Ford group increases by approximately 27.8 ft (8.47 m), a 13.59% increase, from the Scott Ranch site in north Lozier Canyon to south Lozier Canyon. Each Eagle Ford facies increases in thickness from north-to-south Lozier Canyon with Facies C exhibiting the largest percent change in thickness at 20.18%. Skeletal packstone-grainstone bedforms in Facies B are less laterally continuous up-section from the base of the Sub-facies B2 – B3 contact into the mud-dominated uppermost Facies B (B5). A characterization of fractures traced in 2-D orthomosaics is related to bedding features in Facies B and Facies C. Fractures are generally shorter (vertically and laterally), more closely spaced, and have higher intensities in Facies B than in Facies C at each respective study site. Furthermore, our findings indicate that, as apparent fracture spacing decreases, apparent fracture dip increases. This inverse relationship between apparent fracture spacing and apparent fracture dip is related to outcrop strike and used to estimate the orientation of dominant fracture sets in Lozier Canyon. This study highlights the practicality of using unmanned aerial vehicles (UAVs) and photogrammetry techniques to study vast areas of largely inaccessible outcrop. DOMs were interpreted and imported into Schlumberger’s Petrel 2014 and will be used to construct improved reservoir models of the Eagle Ford group in future studies. These models may have application in helping to predict subsurface reservoir variability in the Eagle Ford group and may be valuable for improving our understanding of other unconventional carbonate mudstone reservoirs, such as the Haynesville and Utica shales. Advisors/Committee Members: Laya, Juan Carlos (advisor), Pope, Michael (committee member), Ayers, Walter (committee member).

Subjects/Keywords: Eagle Ford; Unconventional; Lozier Canyon; Digital Outcrop Model; Stratigraphic Variability; Photogrammetry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Davis, D. E. (2017). Digital Outcrop Models of the Eagle Ford Group in Lozier Canyon, Terrell County, Texas. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161634

Chicago Manual of Style (16th Edition):

Davis, Drew Edward. “Digital Outcrop Models of the Eagle Ford Group in Lozier Canyon, Terrell County, Texas.” 2017. Masters Thesis, Texas A&M University. Accessed April 15, 2021. http://hdl.handle.net/1969.1/161634.

MLA Handbook (7th Edition):

Davis, Drew Edward. “Digital Outcrop Models of the Eagle Ford Group in Lozier Canyon, Terrell County, Texas.” 2017. Web. 15 Apr 2021.

Vancouver:

Davis DE. Digital Outcrop Models of the Eagle Ford Group in Lozier Canyon, Terrell County, Texas. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/1969.1/161634.

Council of Science Editors:

Davis DE. Digital Outcrop Models of the Eagle Ford Group in Lozier Canyon, Terrell County, Texas. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161634


Texas A&M University

3. Lyon, Trey Saxon. Determining the Depositional Environment of the Lower Eagle Ford Group in Lozier Canyon, Antonio Creek, and Osman Canyon: An Out Crop Study of Bedding Features a Study of Bedding Features at Outcrop Scale or in the Outcrop.

Degree: MS, Geology, 2015, Texas A&M University

The Eagle Ford Formation is currently the most economically significant unconventional resource play in the state of Texas. There has been much debate as to the environment of deposition for the lowermost Facies A of the Eagle Ford in outcrop exposures in Lozier Canyon, Texas. Two conflicting hypotheses were proposed: 1) Sedimentary structures in Facies A are hummocky cross-stratification (HCS) and swaley cross-stratification (SCS), which indicates a shelfal depositional environment above the storm wave base (SWB). 2) Sedimentary structures in Facies A are a mixture of diagenetically separated contourites, turbidites, and pinch-and-swell beds, which indicate a distal-slope depositional environment below SWB. This research used field work, three-dimensional analysis of sedimentary structures, measurements of ripple height, and laboratory analysis to interpret the environment of deposition. The results of these observations and data suggest that the sedimentary structures in Facies A record a depositional environment above SWB. Observation of cross-bedded structures in three-dimensions reveals (i) isotropic truncation of laminae; (ii) symmetric rounded ripples; (iii) large variations in laminae geometry, truncation, and dip inclination, attributed to fluctuations in storm intensity, frequency, and duration; and (iv) and bidirectional downlap and reactivation surfaces associated with oscillatory flow above the SWB. This study interprets cross-bedded sedimentary structures in Facies A as swaley cross-stratification (SCS) and hummocky cross-stratification (HCS) associated with storm events, and thus places Facies A in a depositional environment above storm wave-base (SWB). Advisors/Committee Members: Giardino, John R (advisor), Laya, Juan Carlos (committee member), Pope, Mike (committee member), Houser, Christopher (committee member).

Subjects/Keywords: Eagle Ford; Boquillas; sedimentology; hummocky cross stratification; tempestite; depositional environment; outcrop; Lozier Canyon; Osman Canyon; cross bedding; cross; HCS; swaley; turbidite; contourite; West Texas

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Lyon, T. S. (2015). Determining the Depositional Environment of the Lower Eagle Ford Group in Lozier Canyon, Antonio Creek, and Osman Canyon: An Out Crop Study of Bedding Features a Study of Bedding Features at Outcrop Scale or in the Outcrop. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155182

Chicago Manual of Style (16th Edition):

Lyon, Trey Saxon. “Determining the Depositional Environment of the Lower Eagle Ford Group in Lozier Canyon, Antonio Creek, and Osman Canyon: An Out Crop Study of Bedding Features a Study of Bedding Features at Outcrop Scale or in the Outcrop.” 2015. Masters Thesis, Texas A&M University. Accessed April 15, 2021. http://hdl.handle.net/1969.1/155182.

MLA Handbook (7th Edition):

Lyon, Trey Saxon. “Determining the Depositional Environment of the Lower Eagle Ford Group in Lozier Canyon, Antonio Creek, and Osman Canyon: An Out Crop Study of Bedding Features a Study of Bedding Features at Outcrop Scale or in the Outcrop.” 2015. Web. 15 Apr 2021.

Vancouver:

Lyon TS. Determining the Depositional Environment of the Lower Eagle Ford Group in Lozier Canyon, Antonio Creek, and Osman Canyon: An Out Crop Study of Bedding Features a Study of Bedding Features at Outcrop Scale or in the Outcrop. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Apr 15]. Available from: http://hdl.handle.net/1969.1/155182.

Council of Science Editors:

Lyon TS. Determining the Depositional Environment of the Lower Eagle Ford Group in Lozier Canyon, Antonio Creek, and Osman Canyon: An Out Crop Study of Bedding Features a Study of Bedding Features at Outcrop Scale or in the Outcrop. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155182

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