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Book Quantifying Contributions to the Variance of Permeability and Porosity Within the Western Belt Sandstones of the Cypress Formation Illinois Basin

Download or read book Quantifying Contributions to the Variance of Permeability and Porosity Within the Western Belt Sandstones of the Cypress Formation Illinois Basin written by Nathaniel Frederick Dulaney and published by . This book was released on 2020 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the strategies for reducing the emission of the greenhouse gas carbon dioxide (CO2) and mitigating its accumulation into the Earth's atmosphere is geologic sequestration (GSCO2). This process might be paired with enhanced oil recovery (EOR) within depleted oil reservoirs to provide an economic incentive for GSCO2. Heterogeneity within reservoirs (e.g. spatial differences in entry pressure, permeability, and porosity) can exert significant influence on the dynamics of fluid flow during EOR and GSCO2, and thus on the ultimate success of GSCO2-EOR. The Western Belt sandstones of the Cypress Formation in the Illinois Basin are candidate reservoirs for GSCO2-EOR. Heterogeneity in the Western Belt reservoir rock was analyzed by quantifying contributions to the variance of log-permeability and porosity that arise from differences in primary depositional factors (grain size and bedding structure) and secondary diagenetic factors (compaction and cementation). The greatest contribution to the variance in log-permeability and porosity arises from the differences in means between grain-size units, including lower very-fine sand, upper very-fine sand, lower fine sand, upper fine sand, and lower medium sand unit types. The variance within these unit types also makes a significant contribution. Differences in mean log-permeability or porosity between types of bedding structures contributes little to the variance, and the grain size and bedding structure factors are relatively uncorrelated. Differences in the amount of diagenetic cementation and compaction do not contribute appreciably to the variance in permeability and porosity. These results are based on a limited number of research-quality rock cores extracted from the Western Belt reservoir. More cores should be obtained and studied in this way to assess the generality of these findings within the Western Belt reservoir.

Book Petrographic Investigation Into the Development of Secondary Porosity in Sandstones a Case Study of the Cambrian Mount Simon and Galesville Sandstones Illinois Basin

Download or read book Petrographic Investigation Into the Development of Secondary Porosity in Sandstones a Case Study of the Cambrian Mount Simon and Galesville Sandstones Illinois Basin written by Mojisola Abosede KunleDare and published by . This book was released on 2005 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Petrographic studies of the Mount Simon and Galesville sandstones (Cambrian, Illinois basin) reveal the presence of secondary porosity that developed during mesodiagenesis. The Mount Simon Sandstone contains secondary porosity by hematite cement dissolution and minor framework grain (feldspar and quartz) dissolution. Early hematite cement preserved potential porosity during compaction. The Galesville Sandstone contains 1-8% secondary porosity by framework grain (mainly feldspar with minor rock fragment and quartz) dissolution. This porosity was preserved in a mechanically stable, compaction resistant framework of quartz grains; this phenomenon is named "The Buckyball Effect" in this study. In the Mount Simon Sandstone, lamination is defined by the presence or lack of hematite cement. Hematite rich laminae have high porosity, contain rounded quartz grains rimmed by hematite, and hematite patches within pore space; whereas nonhematite cemented laminae have low porosity and consist of sutured grains with intergranular detrital (2M 1) illite. The laminations resulted from periodic synsedimentary hematite cementation. Upon burial, non-hematite cemented laminae became sutured by pressure solution. Hematite cemented laminae preserved intergranular volume by resisting compaction. Subsequent dissolution of hematite cement by basinal fluids resulted in new porosity. Sutured zones present permeability barriers (0.1-2.7 md horizontal and 2.9-4.0 md vertical permeability) compared to non-sutured zones (4.3-12.7 md horizontal and 10.2-12.7 md vertical permeability). This study is the first report of this type of suturing and its effect on reservoir properties in the Mount Simon Sandstone. X-Ray diffraction studies of Eau Claire Formation shales reveal that the

Book Porosity and Permeability in Permian Sandstones

Download or read book Porosity and Permeability in Permian Sandstones written by and published by . This book was released on 1992 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Porosity and Permeability in Permean Sandstones

Download or read book Porosity and Permeability in Permean Sandstones written by William J. Stuart and published by . This book was released on 1991 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Controls on Porosity and Permeability of Hydrocarbon Reservoirs in Lower Tertiary Sandstones Along the Texas Gulf Coast

Download or read book Controls on Porosity and Permeability of Hydrocarbon Reservoirs in Lower Tertiary Sandstones Along the Texas Gulf Coast written by R. G. Loucks and published by . This book was released on 1986 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Rapid Determination of Permeability in Porous Rock

Download or read book Rapid Determination of Permeability in Porous Rock written by Jerry B. F. Champlin and published by . This book was released on 1962 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Evolution of porosity in Deep sandstones of the Permian upper part of the Minnelusa Formation Powder River basin Wyoming

Download or read book Evolution of porosity in Deep sandstones of the Permian upper part of the Minnelusa Formation Powder River basin Wyoming written by Christopher J. Schenk and published by . This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Porosity Water Chemistry Cement and Grain Fabric

Download or read book Porosity Water Chemistry Cement and Grain Fabric written by Thomas A. Metarko and published by . This book was released on 1980 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Sand Distribution in the Cypress Formation Clay County and Vicinity Illinois

Download or read book Sand Distribution in the Cypress Formation Clay County and Vicinity Illinois written by John Judson Chapman and published by . This book was released on 1953 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper contains the results of an electric log study of the Cypress formation in Clay County and vicinity, Illinois. The formation is separated into three phases corresponding to each of the three main sands in the section. Statistical diagrams based on a section by section measurement of the linear directions of each sand, as shown on the isopachous maps, are included. Several small cross sections of linear bodies in each sand, as well as four regional cross sections, were constructed. A litho-facies map based on the distribution of sand, sandy shale and shale in the upper three feet of the formation is also included. The massive basal sand forms a blanket deposit over most of the area. Superimposed on this blanket are numerous northwest trending linear sand bodies and several shorter northeast trending bodies. The same linear features are repeated in the middle sand, to a lesser degree. The blanket sand is missing and the northwest trending sand features are concentrated into broad bands. The northeast trending bodies are poorly developed. The upper sand is the most restricted in distribution of the three. The northwest direction of elongation predominates. The cause of the sand features present in the formation is not known. It is believed that deposition took place in a gradually shoaling marine environment with dry land being present in the region toward the end of the interval. Features suggestive of such diverse environments of deposition as deltas, tidal lagoons and open seas are all present, but are not conclusive enough to warrant a decision as to the cause. It is doubtful if a single environment prevailed throughout the entire formation.