Download or read book Effect of Porosity and Mineralogy on the Deformation of St Peter Sandstone written by Dan Spencer Spitz and published by . This book was released on 1972 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iowa state college journal of science written by and published by . This book was released on 1973 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Porosity Permeability and Microstructure of the St Peter Sandstone written by Carol Lynn Spoerl and published by . This book was released on 1983 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iowa State Journal of Research written by and published by . This book was released on 1972 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iowa State Journal of Research written by Iowa. State College, Cedar Falls and published by . This book was released on 1972 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstructure and Geotechnical Properties of St Peter Sandstone in Clayton Iowa written by Amir Hossein Bagherieh and published by . This book was released on 2015 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The St. Peter Sandstone is significantly different from the minerals and rocks which have been studied extensively in mining. It is brittle and characterized by an unusually high friction angle. On the other hand it is friable, and it is nearly cohesionless. The scarcity of the ground control techniques for this particular mining environment has created many difficulties for mine operators. This research aims to establish a fundamental understanding of the basic mechanical and strength properties of the St. Peter Sandstone for engineering design and scientific research. The specific objectives are 1) characterizing the strength of the St. Peter Sandstone, and 2) elucidating the strength mechanics by scientific evidences. The study is essential for developing safe and reliable ground control techniques for mining under this sandstone condition. In this study, extensive conventional rock mechanics testing, as well as a detailed particle structure including optical and scanning electron microscopies studies was carried out on St. Peter Sandstone. An appropriate sample preparation technique for St. Peter Sandstone is proposed. The optimum specimen size for characterizing St. Peter Sandstone was determined. The mechanical behavior of St. Peter Sandstone was investigated under triaxial compressive condition. The results indicated that confining pressure will significantly increase the strength and change the mechanical behavior of St. Peter Sandstone from brittle to ductile. The particle structure of St. Peter Sandstone was studied in terms of porosity, particle size distribution, and density. It was demonstrated that the mechanical and strength properties of the St. Peter Sandstone are fundamentally governed by its particle structure. The systematic presence of Hertzian fractures on the St. Peter Sandstone particle structures were obtained, identified and demonstrated. The finding provides direct evidence to resolve outstanding issues regarding the depositional environment of the St. Peter Sandstone. It was indicated that Hertzian fractures were not the product of eolian action. The contact surface of St. Peter's sand grains was investigated. It was found that the majority of contact surfaces are smooth. Hence, the high friction angle of St. Peter Sandstone cannot be attributed to "penetrative surfaces" as hypothesized by locked sand theory"--Abstract, page iii.
Download or read book Porosity grain fabric water chemistry cement and depth of the St Peter Sandstone in the Illinois Basin written by D. John Hoholick and published by . This book was released on 1980 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sedimentary and Petrographic Analysis of the St Peter Sandstone written by George Alfred Thiel and published by . This book was released on 1935 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Problem of the St Peter Sandstone written by Charles Laurence Dake and published by . This book was released on 1921 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compressibility of Sandstones written by R.W. Zimmerman and published by Elsevier. This book was released on 1990-11-19 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive treatment of the elastic volumetric response of sandstones to variations in stress. The theory and data presented apply to the deformations that occur, for example, due to withdrawal of fluid from a reservoir, or due to the redistribution of stresses caused by the drilling of a borehole. Although the emphasis is on reservoir-type sandstones, results and methods discussed are also applicable to other porous rocks. Part One concerns the effect of stress on deformation and discusses porous rock compressibility coefficients. Elasticity theory is used to derive relationships between the porous rock compressibility coefficients, the porosity, and the mineral grain compressibility. Theoretical bounds on the compressibility coefficients are derived. The concept of effective stress coefficients is examined, as is the integrated form of the stress-strain relationships. Undrained compression and induced pore pressures are treated within the same general framework. Part One is concluded with a brief, elementary introduction to Biot's theory of poroelasticity. All the results in Part One are illustrated and verified with extensive references to published compressibility data. Part Two deals with the relationship between pore structure and compressibility, and presents methods that permit quantitative prediction of the compressibility coefficients. Two- and three-dimensional models of tubular pores, spheroidal pores, and crack-like "grain boundary" voids are analyzed. A critical review is made of various methods that have been proposed to relate the effective elastic moduli (bulk and shear) of a porous material to its pore structure. Methods for extracting pore aspect ratio distributions from stress-strain data or from acoustic measurements are presented, along with applications to actual sandstone data. Part Three is a brief summary of experimental techniques that are used to measure porous rock compressibilities in the laboratory. The information contained in this volume is of interest to petroleum engineers, specifically those involved with reservoir modeling, petroleum geologists, geotechnical engineers, hydrologists and geophysicists.
Download or read book Effect of Structural Deformation on the Petrology and Distribution of Diagenetic Alteration Within the Oriskany Sandstone in Little Mountain Anticline of the Smoke Hole Region of Eastern West Virginia written by Brian D Klipp and published by . This book was released on 2016 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lower Devonian Oriskany Sandstone is a quartz arenite formation that is located throughout the Appalachian Basin and extends from New York to Virginia. In West Virginia, Oriskany Sandstone found in the western and central part of the state possesses favorable reservoir porosity values of ~6% and permeability values of ~10md. In the structurally complex northeastern part of West Virginia, the Oriskany Sandstone contains much lower porosity and permeability values due to diagenetic alteration. This study focuses on identifying the diagenetic alterations that create and destroy porosity in northeast West Virginia Oriskany Sandstone. An Oriskany Sandstone bed, located in Little Mountain Anticline of the Smoke Hole Region in northeast West Virginia, was divided into three fold zones and analyzed through thin section. Petrographic and diagenetic analysis was accomplished by using the 300 point count method on samples in thin section. Mineralogically the sandstone contains 63% quartz, 23% feldspar, 7% carbonate, 5% argillaceous and accessory minerals, and the remainder was porosity. Porosity occluding diagenetic alterations observed in Little Mountain Anticline include cementation by quartz, feldspar, and carbonate. All microscopic primary porosity was occluded. Secondary porosity ([less than] 2%) is associated with grain dissolution and the formation of solution seams and stylolites. Solution seams and stylolites are oriented parallel to bedding, having formed due to overburden stresses, and at acute angles to bedding, resulting from deformational stresses. Porosity differs between zones. South limb and axis zones show dissolution and solution seam-related porosity whereas the north limb zone shows only solution seam-related porosity. These microscopic-scale properties are not favorable for natural gas extraction, and unsuitable for potential future CO2 sequestration.
Download or read book Quartz Cementation in Sandstones written by R. Worden and published by John Wiley & Sons. This book was released on 2009-09-18 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quartz is the major porosity-reducing cement in many sandstonesequences. Therefore, Quartz cements represent a key source ofpetrographic and geochemical information about diagenetic history.They are also the major determinant of sandstone reservoirquality. While the ultimate goal of research in this area is to makerobust predictions about the amount and distribution of quartzcements in a wide variety of depositional and burial settings,there are nevertheless large areas of the subject that are poorlyunderstood and remain the subject of controversy. The aim of this Volume, which is based partly on paperssubmitted to a 1996 workshop in Belfast, and partly on invitedcontributions, is to bring together some of the main strands ofresearch into quartz cements and provide a focus for debate anddirection for future research. This book will be welcomed by sedimentologists, petrographersand geochemists involved in sandstone digenesis, as well as bypetroleum geologists seeking a deeper understanding of the factorsinfluencing reservoir porosity and permeability. Contributors from 11 countries and 4 continents. Represents the benchmark in quartz cement research. If you are a member of the International Association ofSedimentologists, for purchasing details, please see:http://www.iasnet.org/publications/details.asp?code=SP29
Download or read book Sandstone Petrography Petrology and Modeling written by Thomas R. Taylor and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides both an updated foundation in modern sandstone petrology and a practical guide for the petrographic analysis of sandstones. Sandstones typically undergo enormous changes in their mechanical and fluid-flow properties from deposition through burial to the present day. Quantitative, rigorously collected petrographic data provide the best available basis for understanding the controls on these properties, which are of fundamental importance in engineering and the geosciences. For instance, sandstone reservoir characteristics are essential controls on fluid production (e.g., geothermal energy and hydrocarbons) and injection (e.g., greenhouse gases and contaminants). The spatial and temporal variations in sandstone properties are central concerns in fields such as paleohydrology, structural deformation, geomechanics, and seismology.
Download or read book Controls on Porosity and Cement Distribution in a Diagenetically Banded Interval in the St Peter Sandstone Michigan Basin written by Lisa Diann Shepherd and published by . This book was released on 1992 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permeability Effects of Deformation Bands in Porous Sandstones written by Douglas Hayden Freeman and published by . This book was released on 1990 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Deformation in Sandstone Carbonates and Quartz Aggregate written by and published by . This book was released on 2015 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first part of my thesis is mainly focused on the effect of grain size distribution on compaction localization in porous sandstone. To identify the microstructural parameters that influence compaction band formation, I conducted a systematic study of mechanical deformation, failure mode and microstructural evolution in Bleurswiller and Boise sandstones, of similar porosity (~25%) and mineralogy but different sorting. Discrete compaction bands were observed to develop over a wide range of pressure in the Bleurswiller sandstone that has a relatively uniform grain size distribution. In contrast, compaction localization was not observed in the poorly sorted Boise sandstone. My results demonstrate that grain size distribution exerts important influence on compaction band development, in agreement with recently published data from Valley of Fire and Buckskin Gulch, as well as numerical studies. The second part aimed to improve current knowledge on inelastic behavior, failure mode and brittle-ductile transition in another sedimentary rock, porous carbonates. A micritic Tavel (porosity of ~13%) and an allochemical Indiana (~18%) limestones were deformed under compaction in wet and dry conditions. At lower confining pressures, shear localization occurred in brittle faulting regime. Through transitional regime, the deformation switched to cataclastic flow regime at higher confining pressure. Specifically in the cataclastic regime, the (dry and wet) Tavel and dry Indiana failed by distributed cataclastic flow, while in contrast, wet Indiana failed as compaction localization. My results demonstrate that different failure modes and mechanical behaviors under different deformation regimes and water saturation are fundamental prior to any geophysical application in porous carbonates. The third part aimed to focus on investigating compaction on quartz aggregate starting at low (MPa) using X-ray diffraction. We report the diffraction peak evolution of quartz with increasing pressures. Through evaluating the unit cell lattice parameters and the volume of the quartz sample, macroscopic stress and strain were resolved. Moreover, we observed quartz peak broadened asymmetrically at low pressure, such extent is more prominent in axial than in radial direction. Our evaluation on peak [101] (highest intensity among peaks) demonstrated that full width at half maximum can be a good proxy for microscopic stress distribution. We observed deviations in the pressurevolume curves at P = ~0.4 GPa and speculated that it was the point of which onset of grain crushing and pore collapse occur in quartz. This is on the same order of which onset of grain crushing (commonly known as P*) is observed in sandstones in the rock mechanics literature. This demonstrated that there is potential in estimating grain crushing and pore collapse pressure with our technique.
Download or read book Critical State Plasticity Theory Applied to Deformation of Porous Sandstone written by Martin Peter Olsen and published by . This book was released on 1996 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
