ALBERT

Description / Table of Contents: Petrophysics is the study of the physical properties of rocks in the broadest sense. As such it provides the fundamental understanding that enables geologists to describe the physical state of a rock, to predict its behaviour and to interpret geophysical data. Traditionally the emphasis has been on hydrocarbon reservoir evaluation, but it is equally applicable to the evolution of the Earth at all scales. This volume includes developments in pore-scale studies, electrical properties, seismic methods and measurement techniques, as well as reviewing aspects of petrophysical prediction and interpretation.

Description / Table of Contents: There is much interest in gas hydrates in relation to their potential role as an importantdriver for climate change and as a major new energy source; however, many questionsremain, not least the size of the global hydrate budget. Much of the current uncertaintycentres on how hydrates are physically stored in sediments at a range of scales. Thisvolume details advances in our understanding of sediment-hosted hydrates, and containspapers covering a range of studies of real and artificial sediments containing bothmethane hydrates and CO2 hydrates. The papers include an examination of the techniquesused to locate, sample and characterize hydrates from natural, methane-rich systems, soas to understand them better. Other contributions consider the nature and stability ofsynthetic hydrates formed in the laboratory, which in turn improve our ability to makeaccurate predictive models.

Description / Table of Contents: There is much interest in gas hydrates in relation to their potential role as an important driver for climate change and as a major new energy source; however, many questions remain, not least the size of the global hydrate budget. Much of the current uncertainty centres on how hydrates are physically stored in sediments at a range of scales. This volume details advances in our understanding of sediment-hosted hydrates, and contains papers covering a range of studies of real and artificial sediments containing both methane hydrates and CO2 hydrates. The papers include an examination of the techniques used to locate, sample and characterize hydrates from natural, methane-rich systems, so as to understand them better. Other contributions consider the nature and stability of synthetic hydrates formed in the laboratory, which in turn improve our ability to make accurate predictive models.

Description / Table of Contents: Introduction / Geological Society, London, Special Publications, 48:vii-viii, doi:10.1144/GSL.SP.1990.048.01.01 --- Sedimentology --- Stefan M. Luthi: Sedimentary structures of clastic rocks identified from electrical borehole images / Geological Society, London, Special Publications, 48:3-8,NP-NP-NP-NP,9-10, doi:10.1144/GSL.SP.1990.048.01.02 --- S. D. Harker, G. J. McGann, L. T. Bourke, and J. T. Adams: Methodology of Formation MicroScanner image interpretation in Claymore and Scapa Fields (North Sea) / Geological Society, London, Special Publications, 48:11-25, doi:10.1144/GSL.SP.1990.048.01.03 --- M. H. Rider: Gamma-ray log shape used as a facies indicator: critical analysis of an oversimplified methodology / Geological Society, London, Special Publications, 48:27-37, doi:10.1144/GSL.SP.1990.048.01.04 --- J. C. Herweijer, C. F. W. Höcker, H. Williams, and K. M. Eastwood: The relevance of dip profiles from outcrops as reference for the interpretation of SHDT dips / Geological Society, London, Special Publications, 48:39-43, doi:10.1144/GSL.SP.1990.048.01.05 --- D. E. King: Incorporating geological data in well log interpretation / Geological Society, London, Special Publications, 48:45-55, doi:10.1144/GSL.SP.1990.048.01.06 --- B. P. Moss: Stochastic reservoir description: a methodology / Geological Society, London, Special Publications, 48:57-75, doi:10.1144/GSL.SP.1990.048.01.07 --- C. M. Griffiths: The language of rocks: an example of the use of syntactic analysis in the interpretation of sedimentary environments from wireline logs / Geological Society, London, Special Publications, 48:77-94, doi:10.1144/GSL.SP.1990.048.01.08 --- R. Nurmi, M. Charara, M. Waterhouse, and R. Park: Heterogeneities in carbonate reservoirs: detection and analysis using borehole electrical imagery / Geological Society, London, Special Publications, 48:95-111, doi:10.1144/GSL.SP.1990.048.01.09 --- M. H. Dorfman, J.-J. Newey, and G. R. Coates: New techniques in lithofacies determination and permeability prediction in carbonates using well logs / Geological Society, London, Special Publications, 48:113-120, doi:10.1144/GSL.SP.1990.048.01.10 --- Stratigraphic Correlation --- P. F. Worthington: Sediment cyclicity from well logs / Geological Society, London, Special Publications, 48:123-132, doi:10.1144/GSL.SP.1990.048.01.11 --- C. M. Griffiths and S. Bakke: Interwell matching using a combination of petrophysically derived numerical lithologies and gene-typing techniques / Geological Society, London, Special Publications, 48:133-151, doi:10.1144/GSL.SP.1990.048.01.12 --- D. K. Buckley and D. Oliver: Geophysical logging of water exploration boreholes in the Deccan Traps, Central India / Geological Society, London, Special Publications, 48:153-161, doi:10.1144/GSL.SP.1990.048.01.13 --- Mineralogy and Geochemistry --- M. M. Herron and S. L. Herron: Geological applications of geochemical well logging / Geological Society, London, Special Publications, 48:165-175, doi:10.1144/GSL.SP.1990.048.01.14 --- R. N. Anderson, R. E. Dove, and E. Pratson: Geochemical well logs: calibration and lithostratigraphy in basaltic, granitic and metamorphic rocks / Geological Society, London, Special Publications, 48:177-184,NP-NP,185-194, doi:10.1144/GSL.SP.1990.048.01.15 --- T. S. Brewer, M. A. Lovell, P. K. Harvey, R. Pelling, B. P. Atkin, and A. Adamson: Preliminary geochemical results from DSDP/ODP Hole 504B: a comparison of core and log data / Geological Society, London, Special Publications, 48:195-202, doi:10.1144/GSL.SP.1990.048.01.16 --- T. J. Primmer, S. A. Kerr, and K. J. Myers: Feasibility of in situ elemental analysis in mudrock evaluation / Geological Society, London, Special Publications, 48:203-210, doi:10.1144/GSL.SP.1990.048.01.17 --- Andrew Hurst: Natural gamma-ray spectrometry in hydrocarbon-bearing sandstones from the Norwegian Continental Shelf / Geological Society, London, Special Publications, 48:211-222, doi:10.1144/GSL.SP.1990.048.01.18 --- B. Humphreys and G. K. Lott: An investigation into nuclear log responses of North Sea Jurassic sandstones using mineralogical analysis / Geological Society, London, Special Publications, 48:223-240, doi:10.1144/GSL.SP.1990.048.01.19 --- A. E. Stocks and S. R. Lawrence: Identification of source rocks from wireline logs / Geological Society, London, Special Publications, 48:241-252, doi:10.1144/GSL.SP.1990.048.01.20 --- Identification of Faults and Fractures --- W. H. Fertl: Circumferential acoustic logs detect natural fractures and determine their orientation / Geological Society, London, Special Publications, 48:255-262, doi:10.1144/GSL.SP.1990.048.01.21 --- Karl Audun Lehne: Fracture detection from logs of North Sea chalk / Geological Society, London, Special Publications, 48:263-271, doi:10.1144/GSL.SP.1990.048.01.22 --- T. M. Rønningsland: Structural interpretation of dipmeter results in the Gullfaks Field / Geological Society, London, Special Publications, 48:273-286, doi:10.1144/GSL.SP.1990.048.01.23 --- M. C. Devilliers and Ph. Werner: Example of fault identification using dipmeter data / Geological Society, London, Special Publications, 48:287-295, doi:10.1144/GSL.SP.1990.048.01.24 --- D. Goldberg, D. Speed, C. Wilkinson, and E. Scholz: A correlation of hydraulic conductivity from pulse tests with sonic log amplitudes / Geological Society, London, Special Publications, 48:297-302, doi:10.1144/GSL.SP.1990.048.01.25 --- Physical Properties --- J. S. Bell: Investigating stress regimes in sedimentary basins using information from oil industry wireline logs and drilling records / Geological Society, London, Special Publications, 48:305-325, doi:10.1144/GSL.SP.1990.048.01.26 --- C. J. Evans and N. R. Brereton: In situ crustal stress in the United Kingdom from borehole breakouts / Geological Society, London, Special Publications, 48:327-338, doi:10.1144/GSL.SP.1990.048.01.27 --- M. A. Lovell and P. A. Pezard: Electrical properties of basalts from DSDP Hole 504B: a key to the evaluation of pore space morphology / Geological Society, London, Special Publications, 48:339-345, doi:10.1144/GSL.SP.1990.048.01.28 --- D. C. Entwisle and D. M. McCann: An assessment of the use of Christensen’s equation for the prediction of shear wave velocity and engineering parameters / Geological Society, London, Special Publications, 48:347-354, doi:10.1144/GSL.SP.1990.048.01.29