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Books > Earth & environment > Earth sciences > Geology & the lithosphere > Economic geology

Studies on Time Series Applications in Environmental Sciences (Hardcover, 1st ed. 2016): Alina Barbulescu Studies on Time Series Applications in Environmental Sciences (Hardcover, 1st ed. 2016)
Alina Barbulescu
R3,710 R3,270 Discovery Miles 32 700 Save R440 (12%) Ships in 12 - 17 working days

Time series analysis and modelling represent a large study field, implying the approach from the perspective of the time and frequency, with applications in different domains. Modelling hydro-meteorological time series is difficult due to the characteristics of these series, as long range dependence, spatial dependence, the correlation with other series. Continuous spatial data plays an important role in planning, risk assessment and decision making in environmental management. In this context, in this book we present various statistical tests and modelling techniques used for time series analysis, as well as applications to hydro-meteorological series from Dobrogea, a region situated in the south-eastern part of Romania, less studied till now. Part of the results are accompanied by their R code.

Clays (Hardcover, 2005 ed.): Alan Meunier Clays (Hardcover, 2005 ed.)
Alan Meunier
R3,013 Discovery Miles 30 130 Ships in 12 - 17 working days

Here is a comprehensive and up to-do-date presentation of the origins, and properties of clay minerals at the Earth?'s surface. The text reviews the relatively simple laws that govern the chemical or isotopic composition and the crystalline structure of clays, and then discusses their genesis and alteration. Concluding chapters show that clay minerals can form in variety of different environments: meteorites, lavas, subduction zones, among others.

Fundamentals of Petrophysics (Hardcover, 2nd ed. 2017): Shenglai Yang Fundamentals of Petrophysics (Hardcover, 2nd ed. 2017)
Shenglai Yang
R3,945 Discovery Miles 39 450 Ships in 12 - 17 working days

In this book, the fundamental knowledge involved in petroleum & gas development engineering, such as physical and chemical phenomena, physical processes and the relationship between physical factors is covered. It is arranged into 3 Sections. Section 1 including chapter 1-4 is to introduce the properties of fluids (gases, hydrocarbon liquids, and aqueous solutions). Section II including Chapter 5-7 is to introduce the porous rock properties of reservoir rocks. Section III including Chapter 8-10 is to introduce the mechanism of multiphase fluid flow in porous medium. The book is written primarily to serve professionals working in the petroleum engineering field. It can also be used as reference book for postgraduate and undergraduate students as well for the related oil fields in petroleum geology, oil production engineering, reservoir engineering and enhancing oil recovery.

Thermodynamics in Mineral Sciences - An Introduction (Hardcover, 2005): Ladislav Cemic Thermodynamics in Mineral Sciences - An Introduction (Hardcover, 2005)
Ladislav Cemic
R2,495 R1,626 Discovery Miles 16 260 Save R869 (35%) Ships in 12 - 17 working days

This book presents the fundamental principles of thermodynamics for geosciences, based on the author 's own courses over a number of years. Many examples help to understand how mineralogical problems can be solved by applying thermodynamic principles.

Experimental Research in Earthquake Engineering - EU-SERIES Concluding Workshop (Hardcover, 2015 ed.): Fabio Taucer, Roberta... Experimental Research in Earthquake Engineering - EU-SERIES Concluding Workshop (Hardcover, 2015 ed.)
Fabio Taucer, Roberta Apostolska
R5,180 R4,330 Discovery Miles 43 300 Save R850 (16%) Ships in 12 - 17 working days

In this volume, top seismic experts and researchers from Europe and around the world, including the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) in the USA, present the most recent outcome of their work in experimental testing, as well as the results of the transnational access activities of external researchers who have used Europe's seven largest and most advanced seismic testing facilities in the framework of the Seismic Engineering Research Infrastructures for European Synergies (SERIES) Project financed by the European Commission in its 7th Framework Programme (2007-2013). This includes EU's largest reaction wall facility, EU's four largest shaking table laboratories and its two major centrifuges. The work presented includes state-of-the-art research towards the seismic design, assessment and retrofitting of structures, as well as the development of innovative research toward new fundamental technologies and techniques promoting efficient and joint use of the research infrastructures. The contents of this volume demonstrate the fruits of the effort of the European Commission in supporting research in earthquake engineering.

Geostatistics and Petroleum Geology (Hardcover, 2nd ed. 1999): M.E. Hohn Geostatistics and Petroleum Geology (Hardcover, 2nd ed. 1999)
M.E. Hohn
R2,935 Discovery Miles 29 350 Ships in 10 - 15 working days

This book introduces the concepts and methods of spatial statistics to geologists and engineers working with oil and gas data, and covers all of the most commonly encountered geostatistical methods for estimation and simulation. Topics include calculation and modeling of semivariograms, linear methods of kriging, cokriging, nonlinear methods such as indicator kriging and disjunctive kriging, and conditional simulation, including sequential indicator simulation, sequential Gaussian simulation, and simulated annealing. Semivariogram models range from very simple to complex. All of the fundamental semivariogram models are illustrated, along with anisotropic models, hole effects, geometric and zonal models, and the mechanics of fitting models. For each geostatistical method treated in detail, the author introduces necessary theory and background, describes how the method works, the steps a user must go through, and problems a user might encounter. The emphasis throughout is on what the practitioner needs to know, and the results that can be expected. The book is replete with examples in two and three dimensions, using real-world data such as porosity and permeability, gas production, structural elevation of a reservoir, and seismic information. Geostatistics and Petroleum Geology will be an invaluable advanced-level text for students on petroleum engineering and geosciences courses, as well as an important reference for petroleum geologists and petroleum engineers in oil companies worldwide.

Mineral Deposits of North Africa (Hardcover, 1st ed. 2016): Mohammed Bouabdellah, John F. Slack Mineral Deposits of North Africa (Hardcover, 1st ed. 2016)
Mohammed Bouabdellah, John F. Slack
R5,686 Discovery Miles 56 860 Ships in 10 - 15 working days

This volume presents an exhaustive overview of major orebodies and mineral deposits of North Africa. It is intended both for academic researchers and especially for exploration geologists interested in mineral exploration in the northern part of the African continent. Recent changes in the mining laws of most countries in this region have encouraged international mining companies to invest in local mineral industries. Accordingly, this volume will be very useful for these professionals, as well as for researchers in the field of economic geology.

The Geology and Tectonic Settings of China's Mineral Deposits (Hardcover, 2013 ed.): Franco Pirajno The Geology and Tectonic Settings of China's Mineral Deposits (Hardcover, 2013 ed.)
Franco Pirajno
R4,840 R4,323 Discovery Miles 43 230 Save R517 (11%) Ships in 12 - 17 working days

Extensive descriptions of a wide range of key or world-class mineral deposits of China are presented in the context of the country's general geology, tectonic units and mineral systems and their geodynamic evolution within the tectonic framework of the Asian continent. This comprehensive overview, incorporating the latest geological concepts, is the first such coverage written in English by a western expert, and will be of benefit to mineral explorers and miners, as well as to research scientists and students in institutions of higher education. In his compilation of this compendium of Chinese geology and mineral systems, Franco Pirajno draws on first-hand knowledge of China's geology and mineral deposits gained in numerous field visits and research projects with Chinese colleagues from various academic institutions over the past 18 years. First time that a western-based book on China's geology and mineral deposits is published Appropriate for use by the mineral exploration industry Modern English-language geological and mineral deposits information on China Most useful to Western (and Chinese) geoscientists

H2Karst Research in Limestone Hydrogeology (Hardcover, 2014 ed.): Jacques Mudry, Francois Zwahlen, Catherine Bertrand, James W.... H2Karst Research in Limestone Hydrogeology (Hardcover, 2014 ed.)
Jacques Mudry, Francois Zwahlen, Catherine Bertrand, James W. Lamoreaux
R3,480 R3,261 Discovery Miles 32 610 Save R219 (6%) Ships in 12 - 17 working days

Chapters in this book are contributions from the 9th Conference on limestone hydrogeology, organized in Besancon in September 2011 selected by the scientific committee of H2Karst.The book presents latest results on in the field of groundwater flow and storage within the different subsystems of karst aquifers; insights into the complex interaction between groundwater and surface water in karst areas by a multidisciplinary approach; current knowledge on contamination problems and contaminant transport in karst aquifers as well as an overview of karst hydrogeology in different contexts around the world.

Polymer-Improved Oil Recovery (Hardcover, 1991 ed.): K.S. Sorbie Polymer-Improved Oil Recovery (Hardcover, 1991 ed.)
K.S. Sorbie
R8,282 Discovery Miles 82 820 Ships in 10 - 15 working days

The importance of oil in the world economy cannot be overstated, and methods for recovering oil will be the subject of much scientific and engineering research for many years to come. Even after the application of primary depletion and secondary recovery processes (usually waterflooding), much oil usually remains in a reservoir, and indeed in some heterogeneous reservoir systems as much as 70% of the original oil may remain. Thus, there is an enormous incentive for the development of improved or enhanced methods of oil recovery, aimed at recovering some portion of this remainil)g oil. The techniques used range from 'improved' secondary flooding methods (including polymer and certain gas injection processes) through to 'enhanced' or 'tertiary' methods such as chemical (surfactant, caustic, foam), gas miscible (carbon dioxide, gas reinjection) and thermal (steam soak and drive, in-situ combustion). The distinction between the classification ofthe methods usually refers to the target oil that the process seeks to recover. That is, in 'improved' recovery we are usually aiming to increase the oil sweep efficiency, whereas in 'tertiary' recovery we aim to mobilise and recover residual or capillary trapped oil. There are a few books and collections of articles which give general overviews of improved and enhanced oil recovery methods. However, for each recovery method, there is such a wide range of interconnected issues concerning the chemistry, physics and fluid mechanics of flow in porous media, that rarely are these adequately reviewed."

Improving the Earthquake Resilience of Buildings - The worst case approach (Hardcover, 2013 ed.): Izuru Takewaki, Abbas... Improving the Earthquake Resilience of Buildings - The worst case approach (Hardcover, 2013 ed.)
Izuru Takewaki, Abbas Moustafa, Kohei Fujita
R4,272 Discovery Miles 42 720 Ships in 10 - 15 working days

Engineers are always interested in the worst-case scenario. One of the most important and challenging missions of structural engineers may be to narrow the range of unexpected incidents in building structural design. Redundancy, robustness and resilience play an important role in such circumstances. "Improving the Earthquake Resilience of Buildings: The worst case approach" discusses the importance of worst-scenario approach for improved earthquake resilience of buildings and nuclear reactor facilities.


"Improving the Earthquake Resilience of Buildings: The worst case approach" consists of two parts. The first part deals with the characterization and modeling of worst or critical ground motions on inelastic structures and the related worst-case scenario in the structural design of ordinary simple building structures. The second part of the book focuses on investigating the worst-case scenario for passively controlled and base-isolated buildings. This allows for detailed consideration of a range of topics including:


A consideration of damage of building structures in the critical excitation method for improved building-earthquake resilience,


A consideration of uncertainties of structural parameters in structural control and base-isolation for improved building-earthquake resilience, and


New insights in structural design of super high-rise buildings under long-period ground motions.


"Improving the Earthquake Resilience of Buildings: The worst case approach" is a valuable resource for researchers and engineers interested in learning and applying the worst-case scenario approach in the seismic-resistant design for more resilient structures.

Practical Guide to Geo-Engineering - With Equations, Tables, Graphs and Check Lists (Hardcover, 2014 ed.): Milutin Srbulov Practical Guide to Geo-Engineering - With Equations, Tables, Graphs and Check Lists (Hardcover, 2014 ed.)
Milutin Srbulov
R4,282 Discovery Miles 42 820 Ships in 12 - 17 working days

This handy reference manual puts a wealth of ready-to-use information, data, and practical procedures within immediate reach of geo-engineers and technicians, whether they be in the field or office. It assembles and organizes the most-needed set of equations, tables, graphs and check-lists on six major subfields of geo-engineering: investigations, testing, properties, hazards, structures and works. This practical reference for the professional and others interested in the subject of ground engineering skips lengthy definitions to highlight best practice and methods proven most effective. While reflecting codes and standards, it also fills the gaps with non-standard approaches when existing ones are skimpy on practical details or agreement. Enhanced by 146 illustrations and 83 tables, the Practical Guide to Geo-Engineering points users to supporting information and data through its extensive reference list. Audience: This book is of interest to everyone involved in practical geo-engineering.

Geospatial Technology for Earth Observation (Hardcover, 2009 ed.): Deren Li, Jie Shan, Jianya Gong Geospatial Technology for Earth Observation (Hardcover, 2009 ed.)
Deren Li, Jie Shan, Jianya Gong
R5,720 R4,307 Discovery Miles 43 070 Save R1,413 (25%) Ships in 12 - 17 working days

Earth Observation interacts with space, remote sensing, communication, and information technologies, and plays an increasingly significant role in Earth related scientific studies, resource management, homeland security, topographic mapping, and development of a healthy, sustainable environment and community. Geospatial Technology for Earth Observation provides an in-depth and broad collection of recent progress in Earth observation. Contributed by leading experts in this field, the book covers satellite, airborne and ground remote sensing systems and system integration, sensor orientation, remote sensing physics, image classification and analysis, information extraction, geospatial service, and various application topics, including cadastral mapping, land use change evaluation, water environment monitoring, flood mapping, and decision making support. Geospatial Technology for Earth Observation serves as a valuable training source for researchers, developers, and practitioners in geospatial science and technology industry. It is also suitable as a reference book for upper level college students and graduate students in geospatial technology, geosciences, resource management, and informatics.

Seismic Design and Assessment of Bridges - Inelastic Methods of Analysis and Case Studies (Hardcover, 2012 ed.): Andreas J.... Seismic Design and Assessment of Bridges - Inelastic Methods of Analysis and Case Studies (Hardcover, 2012 ed.)
Andreas J. Kappos, M. Saiid Saiidi, M. Nuray Aydinoglu, Tatjana Isakovic
R2,802 Discovery Miles 28 020 Ships in 10 - 15 working days

The book focuses on the use of inelastic analysis methods for the seismic assessment and design of bridges, for which the work carried out so far, albeit interesting and useful, is nevertheless clearly less than that for buildings. Although some valuable literature on the subject is currently available, the most advanced inelastic analysis methods that emerged during the last decade are currently found only in the specialised research-oriented literature, such as technical journals and conference proceedings. Hence the key objective of this book is two-fold, first to present all important methods belonging to the aforementioned category in a uniform and sufficient for their understanding and implementation length, and to provide also a critical perspective on them by including selected case-studies wherein more than one methods are applied to a specific bridge and by offering some critical comments on the limitations of the individual methods and on their relative efficiency. The book should be a valuable tool for both researchers and practicing engineers dealing with seismic design and assessment of bridges, by both making the methods and the analytical tools available for their implementation, and by assisting them to select the method that best suits the individual bridge projects that each engineer and/or researcher faces.

The Shaping of Malaysia (Hardcover): Amarjit Kaur, Ian Metcalfe The Shaping of Malaysia (Hardcover)
Amarjit Kaur, Ian Metcalfe
R2,791 Discovery Miles 27 910 Ships in 10 - 15 working days

This book brings together for the first time studies on all aspects of the Malaysian economy. These range from the geological origins and mineral resources, flora, fauna, peoples and cultures, political development, economy and society, environment and ecotourism in Malaysia and encapsulates the integration of the country into the wider international economy. The book also attempts to make Malaysia's current economic and political development more explicable by considering it in the light of these natural and human resource endowments and by exploring how they have changed over time.

Coupled DEM-CFD Analyses of Landslide-Induced Debris Flows (Hardcover, 1st ed. 2017): Tao Zhao Coupled DEM-CFD Analyses of Landslide-Induced Debris Flows (Hardcover, 1st ed. 2017)
Tao Zhao
R4,587 Discovery Miles 45 870 Ships in 12 - 17 working days

This book reflects the latest research results in computer modelling of landslide-induced debris flows. The book establishes an understanding of the initiation and propagation mechanisms of landslides by means of numerical simulations, so that mitigation strategies to reduce the long-term losses from landslide hazards can be devised. In this context, the book employs the Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD) to investigate the mechanical and hydraulic behaviour of granular materials involved in landslides - an approach that yields meaningful insights into the flow mechanisms, concerning e.g. the mobilization of sediments, the generation and dissipation of excess pore water pressures, and the evolution of effective stresses. As such, the book provides valuable information, useful methods and robust numerical tools that can be successfully applied in the field of debris flow research.

Applied Hydrodynamics in Petroleum Exploration (Hardcover, 2nd ed. 1995): Eric C. Dahlberg Applied Hydrodynamics in Petroleum Exploration (Hardcover, 2nd ed. 1995)
Eric C. Dahlberg
R4,326 Discovery Miles 43 260 Ships in 12 - 17 working days

The second edition of Applied Hydrodynamics in Petroleum Exploration is a concise guide to the properties of fluids and their practical applications in petroleum and gas exploration. This book is a complete, self-contained discussion of hydrodynamics for geologists and geophysicists actively searching for accumulations of oil and gas.Review from the First Edition: "...this book is a good primer and should be read and digested by every exploration geologist." J. Sedimentary Petrology

Mathematical Theory of Oil and Gas Recovery - With Applications to ex-USSR Oil and Gas Fields (Hardcover, 1993 ed.): P.... Mathematical Theory of Oil and Gas Recovery - With Applications to ex-USSR Oil and Gas Fields (Hardcover, 1993 ed.)
P. Bedrikovetsky
R5,779 Discovery Miles 57 790 Ships in 10 - 15 working days

It is a pleasure to be asked to write the foreword to this interesting new book. When Professor Bedrikovetsky first accepted my invitation to spend an extended sabbatical period in the Department of Mineral Resources Engineering at Imperial College of Science, Technology and Medicine, I hoped it would be a period of fruitful collaboration. This book, a short course and a variety of technical papers are tangible evidence of a successful stay in the UK. I am also pleased that Professor Bedrikovetsky acted on my suggestion to publish this book with Kluwer as part of the petroleum publications for which I am Series Editor. The book derives much of its origin from the unpublished Doctor of Science thesis which Professor Bedrikovetsky prepared in Russian while at the Gubkin Institute. The original DSc contained a number of discrete publications unified by an analytical mathematics approach to fluid flow in petroleum reservoirs. During his sabbatical stay at Imperial College, Professor Bedrikovetsky has refined and extended many of the chapters and has discussed each one with internationally recognised experts in the field. He received great encouragement and editorial advice from Dr Gren Rowan, who pioneered analytical methods in reservoir modelling at BP for many years.

Earthquake-Induced Landslides - Proceedings of the International Symposium on Earthquake-Induced Landslides, Kiryu, Japan, 2012... Earthquake-Induced Landslides - Proceedings of the International Symposium on Earthquake-Induced Landslides, Kiryu, Japan, 2012 (Hardcover, 2013 ed.)
Keizo Ugai, Hiroshi Yagi, Akihiko Wakai
R8,879 R8,241 Discovery Miles 82 410 Save R638 (7%) Ships in 12 - 17 working days

Seismicity is a major trigger for landslides with often devastating effects. The Japan Landslide Society (JLS) therefore organized a meeting fully dedicated to the research area of earthquake induced landslides. The symposium covers all aspects of earthquake-induced landslides including the phenomena occurred in manmade embankments as well as in natural slopes in mountainous areas. In this comprehensive volume on landslide science the JLS presents the Proceedings of this First International Symposium on Earthquake-Induced Landslides, held in November 2012 in Kiryu, Japan.

Fundamentals of Fractured Reservoir Engineering, Volume 12 (Hardcover): T.D.Van Golf-Racht Fundamentals of Fractured Reservoir Engineering, Volume 12 (Hardcover)
T.D.Van Golf-Racht
R1,983 Discovery Miles 19 830 Ships in 12 - 17 working days

In the modem language of reservoir engineering by reservoir description is understood the totality of basic local information concerning the reservoir rock and fluids which by various procedures are extrapolated over the entire reservoir. Fracture detection, evaluation and processing is another essential step in the process of fractured reservoir description. In chapter 2, all parameters related to fracture density and fracture intensity, together with various procedures of data processing are discussed in detail. After a number of field examples, developed in Chap. 3, the main objective remains the quantitative evaluation of physical properties. This is done in Chap. 4, where the evaluation of fractures porosity and permeability, their correlation and the equivalent ideal geometrical models versus those parameters are discussed in great detail. Special rock properties such as capillary pressure and relative permeability are reexamined in the light of a double-porosity reservoir rock. In order to complete the results obtained by direct measurements on rock samples, Chap. 5 examines fracturing through indirect measurements from various logging results. The entire material contained in these five chapters defines the basic physical parameters and indicates procedures for their evaluation which may be used further in the description of fractured reservoirs.

Military Geosciences and Desert Warfare - Past Lessons and Modern Challenges (Hardcover, 1st ed. 2016): Eric V. McDonald,... Military Geosciences and Desert Warfare - Past Lessons and Modern Challenges (Hardcover, 1st ed. 2016)
Eric V. McDonald, Thomas Bullard
R6,363 Discovery Miles 63 630 Ships in 12 - 17 working days

This book is a collection of papers presented at the 9th International Conference of Military Geoscience that was held in 2011. The conference included discussion on a diverse range of geosciences, including military history, military geology, teaching geology from a military prospective, geological influence on the battlefield, and environmental and cultural issues related to management of military lands. Geology and geography have played a significant role in military history, from providing the stone for primitive tools and weapons, to the utilization of terrain in offensive and defensive strategies. Specific to this volume, deserts comprise nearly a third of the Earth's surface and have been the site of numerous battles where the dust, heat, and a lack of food and water have provided challenges to military leaders and warriors. This book examines the role of deserts in past and modern warfare, the problems and challenges in managing military lands in desert regions, and how desert environmental conditions can impact military equipment and personnel. This proceedings volume should be of interest to scholars, professionals, and those interested in military history, warfare, geology, geography, cultural resources, general science, and military operations.

Proceedings of GeoShanghai 2018 International Conference: Ground Improvement and Geosynthetics (Hardcover, 1st ed. 2018): Lin... Proceedings of GeoShanghai 2018 International Conference: Ground Improvement and Geosynthetics (Hardcover, 1st ed. 2018)
Lin Li, Bora Cetin, Xiao-ming Yang
R4,294 Discovery Miles 42 940 Ships in 12 - 17 working days

This book is the eighth volume of the proceedings of the 4th GeoShanghai International Conference that was held on May 27 - 30, 2018. This book, entitled Ground Improvement and Geosynthetics", presents the latest information on the new technologies and practical applications in various geotechnical engineering projects and advancements on ground improvement and geosynethetics. This volume presents detailed design procedures and examples to demonstrate the applications of the latest ground improvement technologies and innovative geosynethetics in geotechnical engineering. Topics include pile/column technology as foundations, retaining structures, or embankment supports, physical and chemical technologies for soil stabilization and ground improvement, geosynthetic reinforcement for roads, slopes, retaining walls, and foundations. Each of the papers included in this book received at least two positive peer reviews. The editors would like to express their sincerest appreciation to all of the anonymous reviewers all over the world, for their diligent work.

Modern Technologies for Landslide Monitoring and Prediction (Hardcover, 2015 ed.): Marco Scaioni Modern Technologies for Landslide Monitoring and Prediction (Hardcover, 2015 ed.)
Marco Scaioni
R3,856 R3,374 Discovery Miles 33 740 Save R482 (13%) Ships in 12 - 17 working days

Modern Technologies for Landslide Investigation and Prediction presents eleven contributed chapters from Chinese and Italian authors, as a follow-up of a bilateral workshop held in Shanghai on September 2013. Chapters are organized in three main parts: ground-based monitoring techniques (photogrammetry, terrestrial laser scanning, ground-based InSAR, infrared thermography, and GNSS networks), geophysical (passive seismic sensor networks) and geotechnical methods (SPH and SLIDE), and satellite remote-sensing techniques (InSAR and optical images). Authors of these contributes are internationally-recognized experts in their respective research fields. Marco Scaioni works in the college of Surveying and Geo-Informatics at Tongji University, Shanghai (P.R. China). His research fields are mainly Close-range Photogrammetry, Terrestrial Laser Scanning, and other ground-based sensors for metrological and deformation monitoring applications to structural engineering and geosciences. In the period 2012-2016 he is chairman of the Working Group V/3 in the International Society for Photogrammetry and Remote Sensing, focusing on 'Terrestrial 3D Imaging and Sensors'.

Potash - Deposits, Processing, Properties and Uses (Hardcover, 1996 ed.): D.E. Garrett Potash - Deposits, Processing, Properties and Uses (Hardcover, 1996 ed.)
D.E. Garrett
R14,672 Discovery Miles 146 720 Ships in 12 - 17 working days

Potash is the term generally given to potassium chloride, but it is also loosely applied to the various potassium compounds used in agriculture: po tassium sulfate, potassium nitrate or double salts of potassium and magne sium sulfate (generally langbeinite, K S0 * 2MgS0 ). Sometimes the var 2 4 4 ious compounds are differentiated by the terms muriate of potash, sulfate of potash, etc. When referring to ores, or in geology, all of the naturally found potassium salts are called "potash ores". However, originally potash referred only to crude potassium carbonate, since its sole source was the leaching of wood ashes in large pots. This "pot ash" product was generally recovered from near-seacoast plants, such as the saltwort bush, whose ashes were richer in potassium than sodium carbonate. Inland plant's ashes were generally higher in sodium carbonate, giving rise to the word alkali from the Arabic word for soda ash, al kali. The term was then carried over after potassium was discovered to form the latin word for it, kalium. The recovery of potash from ashes became a thriving small cottage industry throughout the world's coastal areas, and developing economies, such as the early set tlers in the United States were able to generate some much-needed income from its recovery and sale. This industry rapidly phased out with the advent of the LeBanc process for producing soda ash in 1792, and the discovery about the same time of the massive sodium-potassium nitrate deposits in the Atacama Desert of Chile.

Hydrodynamics of Oil and Gas (Hardcover, 1994 ed.): Ian Lerche, R. O. Thomsen Hydrodynamics of Oil and Gas (Hardcover, 1994 ed.)
Ian Lerche, R. O. Thomsen
R4,328 Discovery Miles 43 280 Ships in 12 - 17 working days

There has long been interest in the flow of fluids through permeable aqui fers. Stratigraphic trapping of oil and gas by permeability changes in an aquifer and the amounts of hydrocarbons so trapped are major concerns to the oil industry. The variations of aquifer width and geometry and of the positions in an aquifer where hydrocarbons can be trapped by hydro dynamic forces are intimately intertwined in determining the shape, and thus the volume, of hydrocarbons. Perhaps the seminal work in this area is reflected by King Hubbert's massive review paper "Entrapment of Petroleum under Hydrodynamic Conditions" (Am. Assoc. Pet. Geol. Bull. 37(8), 1954-2026, 1953), in which a wide variety of effects, such as capillarity, buoyancy, surface tension, and salinity of water, are incorporated as basic factors influenc ing the positioning and shaping of hydrocarbon masses in hydrodynami cally active aquifers. In those days, while the basic physics could readily be appreciated, development of a detailed quantitative understanding of the interplay of the various factors in controlling or modulating hydro dynamic shapes was severely limited by computer abilities. Indeed, Hub bert actually constructed and photographed physical models, using alcohol and water, to illustrate basic concepts. It is difficult to obtain an appreciation of the behavior of flow geometries from such experiments when all factors are permitted to vary simultaneously."

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