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Geological Applications of Wireline Logs II (1992)

Geological Society (London, U.K.) ; Hurst, A. ; Griffiths, C. M. ; [et al.]

London : The Geological Society

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Keywords: Bohrlochmessung

Description / Table of Contents: A. Hurst, C. M. Griffiths, and P. F. Worthington: Introduction / Geological Society, London, Special Publications, 65:vii-viii, doi:10.1144/GSL.SP.1992.065.01.01 --- Sedimentology and Stratigraphic Correlation --- Roger M. Slatt, Douglas W. Jordan, Anthony E. D’Agostino, and Robert H. Gillespie: Outcrop gamma-ray logging to improve understanding of subsurface well log correlations / Geological Society, London, Special Publications, 65:3-19, doi:10.1144/GSL.SP.1992.065.01.02 --- I. R. Hatton, M. Reeder, M. St. J. Newman, and D. Roberts: Techniques and applications of petrophysical correlation in submarine fan environments, early Tertiary sequence, North Sea / Geological Society, London, Special Publications, 65:21-30, doi:10.1144/GSL.SP.1992.065.01.03 --- Lawrence T. Bourke: Sedimentological borehole image analysis in clastic rocks: a systematic approach to interpretation / Geological Society, London, Special Publications, 65:31-42, doi:10.1144/GSL.SP.1992.065.01.04 --- Philippe A. Pezard, Richard N. Hiscott, Michael A. Lovell, Albina Collela, and Alberto Malinverno: Evolution of the Izu-Bonin intraoceanic forearc basin, western Pacific, from cores and FMS images / Geological Society, London, Special Publications, 65:43-50,NP-NP,51-69, doi:10.1144/GSL.SP.1992.065.01.05 --- A. R. M. Salimullah and D. A. V. Stow: Application of FMS images in poorly recovered coring intervals: examples from ODP Leg 129 / Geological Society, London, Special Publications, 65:71-86, doi:10.1144/GSL.SP.1992.065.01.06 --- A. R. M. Salimullah and D. A. V. Stow: Wireline log signatures of resedimented volcaniclastic facies, ODP Leg 129, West Central Pacific / Geological Society, London, Special Publications, 65:87-97, doi:10.1144/GSL.SP.1992.065.01.07 --- N. Ruhovets, R. Rau, M. Samuel, H. Smith, Jr., and M. Smith: Evaluating thinly laminated reservoirs using logs with different vertical resolution / Geological Society, London, Special Publications, 65:99-121, doi:10.1144/GSL.SP.1992.065.01.08 --- Erik Bølviken, Geir Storvik, Dag Erik Nilsen, Erling Siring, and Dirk Van Der Wel: Automated prediction of sedimentary facies from wireline logs / Geological Society, London, Special Publications, 65:123-139, doi:10.1144/GSL.SP.1992.065.01.09 --- Gavin I. F. Cameron: Analysis of dipmeter data for sedimentary orientation / Geological Society, London, Special Publications, 65:141-154, doi:10.1144/GSL.SP.1992.065.01.10 --- Fractures and Stress --- R. R. Hillis and A. F. Williams: Borehole breakouts and stress analysis in the Timor Sea / Geological Society, London, Special Publications, 65:157-168, doi:10.1144/GSL.SP.1992.065.01.11 --- Najwa A. Yassir and Maurice B. Dusseault: Stress trajectory determinations in southwestern Ontario from borehole logs / Geological Society, London, Special Publications, 65:169-177, doi:10.1144/GSL.SP.1992.065.01.12 --- S. M. Cowgill, P. G. Meredith, S. A. F. Murrell, and N. R. Brereton: In situ stress orientations in the Witch Ground Graben, North Sea, revealed by borehole breakouts: preliminary results / Geological Society, London, Special Publications, 65:179-184, doi:10.1144/GSL.SP.1992.065.01.13 --- Brian E. Hornby and Stefan M. Luthi: An integrated interpretation of fracture apertures computed from electrical borehole scans and reflected Stoneley waves / Geological Society, London, Special Publications, 65:185-198, doi:10.1144/GSL.SP.1992.065.01.14 --- D. Goldberg, C. Broglia, and K. Becker: Fracture permeability and alteration in gabbro from the Atlantis II Fracture Zone / Geological Society, London, Special Publications, 65:199-210, doi:10.1144/GSL.SP.1992.065.01.15 --- J. S. Bell, G. Caillet, and J. Adams: Attempts to detect open fractures and non-sealing faults with dipmeter logs / Geological Society, London, Special Publications, 65:211-220, doi:10.1144/GSL.SP.1992.065.01.16 --- Martin H. Bremer, Johannes Kulenkampff, and Jürgen R. Schopper: Lithological and fracture response of common logs in crystalline rocks / Geological Society, London, Special Publications, 65:221-234, doi:10.1144/GSL.SP.1992.065.01.17 --- C. J. MacLeod, L. M. Parson, W. W. Sager, and the ODP Leg 135 Scientific Party: Identification of tectonic rotations in boreholes by the integration of core information with Formation MicroScanner and Borehole Televiewer images / Geological Society, London, Special Publications, 65:235-246, doi:10.1144/GSL.SP.1992.065.01.18 --- J. T. Adams, J. K. Ayodele, J. Bedford, C. H. Kaars-Sijpesteijn, and N. L. Watts: Application of dipmeter data in structural interpretation, Niger Delta / Geological Society, London, Special Publications, 65:247-263, doi:10.1144/GSL.SP.1992.065.01.19 --- P. D. Jackson, S. Shedlock, J. Willis-Richards, and A. S. P. Green: Enhanced resolution resistivity logging for fracture studies / Geological Society, London, Special Publications, 65:265-274, doi:10.1144/GSL.SP.1992.065.01.20 --- Physical Properties --- Arne Marius Raaen: High-frequency pseudo-Rayleigh waves as a new indicator of shear velocity / Geological Society, London, Special Publications, 65:277-283, doi:10.1144/GSL.SP.1992.065.01.21 --- C. McCann and J. Sothcott: Laboratory measurements of the seismic properties of sedimentary rocks / Geological Society, London, Special Publications, 65:285-297, doi:10.1144/GSL.SP.1992.065.01.22 --- C. M. Griffiths, N. R. Brereton, R. Beausillon, and D. Castillo: Thermal conductivity prediction from petrophysical data: a case study / Geological Society, London, Special Publications, 65:299-315, doi:10.1144/GSL.SP.1992.065.01.23 --- D. M. McCann and D. C. Entwisle: Determination of Young’s modulus of the rock mass from geophysical well logs / Geological Society, London, Special Publications, 65:317-325, doi:10.1144/GSL.SP.1992.065.01.24 --- Kjetil Gran, Knut Bjørlykke, and Per Aagaard: Fluid salinity and dynamics in the North Sea and Haltenbanken basins derived from well log data / Geological Society, London, Special Publications, 65:327-338, doi:10.1144/GSL.SP.1992.065.01.25 --- Per-Gunnar Alm: The Temperature Decay Log: a different approach to presenting a temperature survey / Geological Society, London, Special Publications, 65:339-348, doi:10.1144/GSL.SP.1992.065.01.26 --- P. L. Ølgaard: A new approach to the interpretation of nuclear borehole logs / Geological Society, London, Special Publications, 65:349-358, doi:10.1144/GSL.SP.1992.065.01.27 --- Mineralogy and Geochemistry --- P. K. Harvey and M. A. Lovell: Downhole mineralogy logs: mineral inversion methods and the problem of compositional colinearity / Geological Society, London, Special Publications, 65:361-368, doi:10.1144/GSL.SP.1992.065.01.28 --- K. J. Myers and K. F. Jenkyns: Determining total organic carbon contents from well logs: an intercomparison of GST data and a new density log method / Geological Society, London, Special Publications, 65:369-376, doi:10.1144/GSL.SP.1992.065.01.29 --- R. C. Selley: The third age of wireline log analysis: application to reservoir diagenesis / Geological Society, London, Special Publications, 65:377-387, doi:10.1144/GSL.SP.1992.065.01.30 --- M. J. Cheshire and B. W. Sellwood: Sandstone diagenesis: framework of a forward modelling approach by integrating wireline and other geological data / Geological Society, London, Special Publications, 65:389-394, doi:10.1144/GSL.SP.1992.065.01.31

Pages: Online-Ressource (VIII, 406 Seiten) , Illustrationen, Diagramme, Karten

ISBN: 090331780X

URL: http://sp.lyellcollection.org/content/65/1

Language: English

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Geological Applications of Wireline Logs II (1992)

A. Hurst ; C. M. Griffiths ; Worthington, P. F., Eds.

The Geological Society

In: London, The Geological Society, vol. 65, no. XVI:, pp. 1-14, (ISBN 0-521-80380-2 (hb), 0521-00859-X (pb))

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Publication Date: 1992

Keywords: Borehole geophys. ; Handbook of geophysics

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BIBLIOGRAPHY SEISMOLOGY

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Provision for expert determination in the unitization of straddling petroleum accumulations (2016)

Worthington, P. F.

Oxford University Press

In: Journal of World Energy Law and Business

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Publication Date: 2016-08-06

Description: Oil and gas fields that straddle a domestic licence boundary or a delimited international border are often unitized so that they can be developed efficiently and effectively as a single entity. The unitization process is usually governed by a pre-unit agreement and a unitization and unit operating agreement. Provision for expert determination in these agreements should include a decision on the basis for tract participation, the determination of initial tract participation around the time of unitization, the formulation of key elements of prescribed technical procedures for any redetermination of tract participation, the redetermination of tract participation post-production, and the enlargement or reduction of the unit area and/or unit interval. The agreements must also define the key issues of how an appointed expert is to arrive at a decision. Expert determination is generally preferred to pendulum decision-making, an expert should carry out an integrated study with a single deliverable as opposed to one that is subdivided into discrete incremental steps, and the expert should table an initial decision for technical and procedural scrutiny by the parties before delivering a final binding decision. Experience has shown that adherence to these principles of prescription facilitates expert engagement during subsequent field life and thereby promotes Pareto-efficiency, fairness and equitability.

Print ISSN: 1754-9957

Electronic ISSN: 1754-9965

Topics: Energy, Environment Protection, Nuclear Power Engineering , Law , Economics

Published by Oxford University Press

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Optimizing the value of reservoir simulation through quality-assured initialization (2014)

Worthington, P. F., Hattingh, S. K. F.

Geological Society of London

In: Petroleum Geoscience

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Publication Date: 2014-09-04

Description: The initialization of a reservoir simulator calls for the populating of a three-dimensional dynamic grid-cell model using subsurface data and interrelational algorithms that have been synthesized to be fit for purpose. These prerequisites are rarely fully satisfied in practice. This paper sets out to strengthen initialization through four key thrusts, all of which seek to optimize the bridgehead between reservoir geoscience and reservoir engineering, and thereby maximize value from reservoir simulation. The first addresses representative data acquisition, which includes the key-well concept as a framework for the cost-effective incorporation of free-fluid porosity and permeability within an initialization database. The second concerns the preparation of these data and their products for populating the static and dynamic models. Important elements are dynamically conditioned net-reservoir cut-offs, recognition of primary flow units, and establishing interpretative algorithms at the simulator grid-cell scale for application over net-reservoir zones. The third thrust is directed at the internal consistency of capillary character, relative permeability properties and petrophysically-derived hydrocarbon saturations over net reservoir. This exercise is central to the simulation function and it is an integral component of hydraulic data partitioning. The fourth concerns the handling of formation heterogeneity and anisotropy, especially from the standpoint of directional parametric averaging and interpretative algorithms. These matters have been synthesized into a workflow for optimizing the initialization of reservoir simulators. In so doing, a further important consideration is the selection of the appropriate procedures that are available within and specific to different software packages. It is the authors’ experience that implementation of these thrusts has demonstrably enhanced the authentication of reservoir simulators through more readily attainable history matches with less required tuning. This outcome is attributed to a more systematic initialization process with a lower risk of artefacts. Of course, these benefits feed through to more assured estimates of ultimate recovery and, thence, hydrocarbon reserves.

Print ISSN: 1354-0793

Topics: Chemistry and Pharmacology , Geosciences

Published by Geological Society of London

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The petrophysics of shale gas reservoirs: Technical challenges and pragmatic solutions (2013)

Bust, V. K., Majid, A. A., Oletu, J. U., Worthington, P. F.

Geological Society of London

In: Petroleum Geoscience

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Publication Date: 2013-05-18

Description: The host rocks of shale gas accumulations act as source, seal and reservoir. They are characterized by complex pore systems with ultra-low to low interparticle permeability and low to moderate porosity. The word ‘shale’ is used in the sense of a geological formation rather than a lithology, so shale gas reservoirs can show marked variations in rock type from claystones, marlstones and mudstones to sandstone and carbonate lithological ‘sweet spots’. The pore space includes both intergranular and intrakerogen porosity. The density of natural fractures varies markedly, and pore throat connectivity is relatively ineffective. Moreover, in-situ gas pore volume has to take account of both free and adsorbed gas, an evaluation exercise that is complicated by pronounced variations in water salinity. All these characteristics present major challenges to the process of petrophysical evaluation. The petrophysical responses to these issues are severalfold. First, a broader calibrating database of core measurements is required at key wells, especially as regards mineralogy, porosity and permeability data, shale/mudstone sample analyses, total organic carbon, gas desorption isotherms, and the analysis of extracted formation waters. Second, at least in the key wells, an extended suite of logs should include an elemental analysis log, magnetic resonance imager, electrical micro-imager, and a dipole sonic log. These databases lead to a rock-typing scheme that takes better account of dynamic properties and fracturability. They also allow reservoir partitioning based on exclusivity of empirical interpretative algorithms, e.g. quartz content vs. producibility. These responses comprise key elements of a functional petrophysical system that encompasses fit-for-purpose interpretation methods, such as a pseudo-Archie approach, i.e. the application of the Archie equations with non-intrinsic exponents. This system is presented as a workflow for application in shale gas reservoirs, for which bulk density retains a major influence on computed gas in place. The benefits of this approach are especially strong in reserves reporting of these unconventional gas reservoirs.

Print ISSN: 1354-0793

Topics: Chemistry and Pharmacology , Geosciences

Published by Geological Society of London

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