Browsing by Subject "Stratigraphic -- Permian"
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Item A petrofabric analysis of the Cox Sandstone, Hudspeth County, Texas(Texas Tech University, 1960-05) Mount, J. RussellNot availableItem A study of Pennsylvanian-Permian arkoses in north-central New Mexico(Texas Tech University, 1950-05) Butler, RoyNot availableItem Deposition and diagenesis of San Andres cores 16-69 and 20-69(Texas Tech University, 1982-05) Jarvi, Thomas RobertNot availableItem Deposition and diagenesis of the Five Finger Carbonate, Council Grove Group, Hugoton Field, Kansas(Texas Tech University, 1981-08) White, Larry MichaelNot availableItem Deposition and diagenesis of the Flippen limestone, Fisher and Jones counties, Texas(Texas Tech University, 1985-05) Henningsen, Gary RNot availableItem Deposition, diagenesis and porosity evolution of the Queen Formation, Winkler County, Texas(Texas Tech University, 1985-05) Lanford, Colleen LorettaNot availableItem Deposition, Diagenesis, and Porosity Relationships of the Lower San Andres Formation, Quay and Roosevelt Counties, New Mexico(Texas Tech University, 1979-05) Worthen, John AldrichNot Available.Item Depositional environments and diagenesis of the lower San Andres Formation(Texas Tech University, 1976-08) Barone, William EdwardNot availableItem Depositional Environments and Diagenesis of the Lower San Andres Formation, Roosevelt and Quay counties, New Mexico(Texas Tech University, 1978-05) Muir, Nancy JeanNot Available.Item Depositional mechanics of the Permian Cherry Canyon Sandstone Tongue, Last Chance Canyon, New Mexico(Texas Tech University, 1966-05) Harrison, Stanley CooperNot availableItem Diagenesis and depositional environment of Noodle Creek limestone Eastern Shelf, Fisher County, Texas(Texas Tech University, 1985-08) Ateiga, Abdalla AliNot availableItem Environment of deposition and diagenesis of the Dean Formation in the Ackerly Field, Dawson County, Texas(Texas Tech University, 1986-05) Girardot, Gerald BNot availableItem Environment of deposition and diagenesis of the San Andres Formation in the Slaughter Field, Cochran and Hockley counties, Texas(Texas Tech University, 1986-08) Markgraf, Phillip CharlesNot availableItem Geomorphic evidence of Permian salt disolution, Hockley and Cochran counties, Texas(Texas Tech University, 1989-05) Ateiga, Abdalla AliGeological investigation in Cochran and Hockley counties, Texas, indicates that subsurface dissolution of Permian salt beds has occurred and is an ongoing process, creating the abnormally high solute loads and saline springs in Paleozoic (mainly Permian) outcrops east of the Southern High Plains. The cumulative thickness of salt lost to dissolution exceeds 500 feet in the northern part of Hockley County, and as much as 500 feet have been removed from parts of Cockran County. Evidence of removal of the salt (mainly halite) and collapse of overlying beds is revealed by cross sections and isopach maps constructed from oil well geophysical logs. Surface manifestation of subsurface dissolution of Permian salt beds and resulting subsidence of overlying beds is indicated by the Anton, Smyer, Whiteface, and Block X basins in Hockley County, but similar relationships were not found in Cochran County. Dissolution has occurred principally in the Salado Formation, with deeper dissolution in the underlying Seven Rivers and/or San Andres formations. Varying amounts of stratigraphic displacement over the dissolution areas indicates that subsidence has been intermittent throughout post-Permian time. Limited thin-section data and geophysical logs show a lack of secondary porosity in the Dewey Lake Formation, thus the section may have acted as a regional aquiclude preventing the downward percolation of water from overlying Mesozoic and Cenozoic aquifers. However, point-source dissolution areas, overlain by the Smyer, Whiteface, and Block X basins, which are not closely related to major tectonic elements in the area, suggest dissolution resulting from the localized, downward infiltration of the groundwater.Item Lithofacies, Porosity and Log Response of the Lower San Andres Formation in the Palo Duro Basin(Texas Tech University, 1983-05) Rahman, Ata UrThe lower San Andres Formation of Curry, DeBaca, Quay and Roosevelt counties, New Mexico, was deposited in the Tucumacari - Palo Duro Basin which was a swale on the Northwestern Shelf of the Permian Basin. Unlike other areas of the Permian Basin where San Andres forms prolific hydrocarbon reservoirs, in the study area it is devoid of hydrocarbons. The study of lithofacies distribution and associated depositional environments, porosity and permeability trends and geophysical log response could serve as a useful model in analyzing and interpreting other similar lithofacies. The lower San Andres consists of dolostones, limestones, dedolostones, anhydrite, halites and thin shales. Four major progradational depositional cycles are recorded. Upward from the base the cycles generally consist of subtidal and intertidal carbonates, supratidal carbonates, sulfates and halite. The vast bulk of the sulfate was emplaced as replacement of dolostones; thus, the presence of anhydrite within a cycle may have little genetic significance. As compared to carbonates, percentages of anhydrite and halite increase both towards the NW (proximally) and within successively younger cycles of deposition. Dolostones to limestone ratio also increases towards the NW and in younger cycles. Porosity and permeability generally increase towards the SE (distally) and in older cycles of deposition. This reflects’ a general progradation of supratidal environments towards SE (distally). Primary porosities are very rarely preserved. Most of the preserved porosities are secondary, tertiary and quaternary in nature. Secondary intercrystalline porosity is more abundant in distal (SE) areas, while moldic porosity is predominent in proximal (NW) areas. Dolostones generally have much greater porosity than limestones. Most lower San Andres intervals have been subjected to two or more cyclic fluid invasions sequences wherein dolomitizing, anhydritizing and low salinity fluids have successively registered their overprints. Dolomite, anhydrite and calcite cements formed during multiple cyclic diagenesis are the prominant porosity occluders. Generally most of the lithofacies can be differentiated on the basis of the log response; however, cross plots of various log values aid in differentiating the lithofacies more explicitly.Item Permian salt dissolution related to alkaline lake basins, southern High Plains, Texas(Texas Tech University, 1986-05) Temple, James MNot availableItem Reef to back-reef facies and diagenesis of the Permian Tansill/Capitan formations in Dark Canyon, Guadalupe Mountains, New Mexico(Texas Tech University, 1984-08) Biggers, BarbaraNot availableItem Subsurface study of the Permian Ozona Canyon sandstone in the Val Verde Basin, Block MM, southwest Crockett County, Texas(Texas Tech University, 1998-05) Kelly, Melissa AnnThe Early Permian Ozona Canyon sandstone is a prolific tight-gas zone in the Val Verde Basin of West Texas. The Ozona Canyon sandstone is classified as sublitharenite to litharenite with porosities averaging less than 3 percent and permeabilities less than 0.1 md. A study of the Ozona Canyon interval was conducted in the northern portion of Block MM, Crockett County, Texas. The study utilized net sand isopach maps and gamma ray log facies distribution maps to evaluate the depositional environment and determine potential infill drilling locations within the field. The Ozona Canyon sandstone was divided into 6 distinct intervals, evaluated individually. The upper Ozona Canyon intervals, A and C, are defined as upper fan deposits based on their isopach trends and log facies and display both channel and lobe and levee characteristics. Middle fan deposits are represented by the Ozona Canyon E and F sands, and are dominated by log facies and sand isopach trends characteristic of channel deposits. Ozona Canyon intervals G and H comprise the lower fan deposits and are distinguished from the upper and middle fan deposits by a hotter gamma ray response and the lack of strong, linear sand trends present in the other Ozona Canyon intervals. The G sand is composed almost entirely of channel log facies, whereas the H sand comprises lobe and levee log facies with virtually no channel log facies. Mapping of the Ozona Canyon sands increased drilling potential in the Block MM field by defining the thick, channel quality sand zones. After completion of the initial maps in August of 1996, over 60 new wells have been drilled. Some of the wells drilled in 1997 yielded IP values greater than 1000 mcfd, higher than that of wells previously drilled in the Ozona Canyon sandstone. The increase in production is attributed to the correlation established between the sand isopach maps and the log facies distribution maps conducted in this study.Item Surficial manifestations of deep-seated Permian salt bed dissolution near Loco Hills, New Mexico(Texas Tech University, 1987-08) Howard, Kerry SNot available