Thesis (Ph. D.)--University of Iowa, 1980. / Includes bibliographical references (leaves 225-234).

Thesis (Ph.D.)--Aberdeen University, 2009. / With: 3D seismic characterization of large-scale sandstone intrusions in the lower Paleogene of the North Sea: completely injected vs in situ remobilized saucer-shaped sand bodies /E. Szarawarska ...et al. In review, Basin Research. Special Issue. Includes bibliographical references.

Thesis (doctoral)--Eberhard-Karls-Universität zu Tübingen, 1927. / Description based on print version record. Includes bibliographical references (p. 62-63).

Thesis (M.S.)--University of Wisconsin--Madison, 1966. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--University of Wisconsin--Madison, 1982. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 135-141).

Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--University of Texas at Dallas, 2007. / Includes vita. Includes bibliographical references (leaves 80-86)

1. The rooks of the study area belong to the upper part of the Carboniferous Sandstone Series, and the Lower Limestone Group of the St Monance syncline. The succession consists of alternating limestones, shales, siltstones, and sandstones with occasional coals. Six sedimentary cycles were examined, and the boundaries to cycles were taken at those points where a carbonate lithology occurs. 2 Sedimentary structures include rib-and-furrow structures, large-scale, mainly through cross-lamination, hummocky cross-stratification, and deformation structures including pseudonodules. Lenticular, wavy and flaser bedding are common. The main palaeocurrent directions are towards the south-west. 3 Sediment distribution, structures, and grain size studies lead to the depositional model of deltaic sediments prograding from NE to SW. 4 Petrological studies by optical microscope, SEM, and X-ray diffraction have been carried out especially on the sandstones. The rocks classify as orthoquartzites. The provenance suggested is principally one of low-grade metamorphic rocks. 5 Studies of diagenesis show cements of carbonates, quartz and Iron-oxides. Authigenic clay minerals are mainly kaolinite with smaller amounts of illlte, chlorite and smectite. 6 The amount of original pore space has been reduced by precipitation of cement and clays. Before the reduction the porosity value may have reached 40%. Two methods were used to get the actual amount of porosity, core sample and thin-section, and they gave values of 30-60% and 25% respectively. The sandstones are mostly permeable, and the pore types associated are intergranular, either formed through dissolution of carbonate cement or other unstable materials. If there has been little or no dissolution, and/or if a high amount of clay is present, microporosity is developed and thirteen types have been recognized. Microporosity may reach up to 89/t of the total porosity as determined by mercury Injection.

Magister Scientiae - MSc / The Bredasdorp basin is a sub-basin of the greater Outeniqua basin. It is located off the south coast, Southeast of Cape Town, South Africa. This basin is one of the largest hydrocarbon (mainly gas) producing basins within Southern Africa. The petrophysical characteristic of the E-block sandstone units within the Bredasdorp basin has been studied to evaluate their hydrocarbon potential. The data sets used in this research were wireline logs (Las format), core data, and geological well completion reports. The three studied wells are E-AH1, E- BW1 and E-L1. The evaluated interval ranges from 2000.33m to 3303.96m in depth with reference to Kelly bushing within the wells. The sandstone reservoirs of the Bredarsdorp basin are characterized by a range of stacked and amalgamated channels. They originated from materials eroded from pre-existing high stand shelf sandstone and transported into the central Bredarsdorp basin by turbidity current. These sandstones are generally in both synrift and drift section. The basin is thought to have developed from fan deltas and stream overwhelmed to water dominated delta. River dominated deltaic system progresses southward over the Northern edge of the central Bredasdorp basin. The Interactive Petrophysics (IP) software has been used extensively throughout the evaluation and development of interpretation model. The lithofacies of the rock units were grouped according to textural and structural features and grain sizes of well (E-AH1, E-BW1 and E-L1). Four different facies (A, B, C and D) were identified from the cored intervals of each well. Facies A was classified as a reservoir and facies B, C and D as a non-reservoir. Detailed petrophysical analyses were carried out on the selected sandstone interval of the studied wells. The cut-off parameters were applied on the seven studied sandstone interval to distinguish between pay and non-pay sand and all intervals were proved to be producing hydrocarbon. Volume of clay, porosity, water saturation and permeability were calculated within the pay sand interval. The average volume of clay ranged from 23.4% to 25.4%. The estimated average effective porosity ranged from 9.47% to 14.3%. The average water saturation ranged from 44.4% to 55.6%. Permeability ranged from 0.14mD to 79mD. The storage and flow capacity ranged from 183.2scf to 3852scf and 2.758mD-ft to 3081mD-ft respectively. The geological well completion reports classify these wells as a gas producing wells. E-L1 is estimated to have a potential recoverable gas volume of 549.06 cubic feet, E-BW1 is estimated to have 912.49 cubic feet and E-AH1 is estimated to have 279.69 cubic feet.

No description available.