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Petroleum Geoscience

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Low permeability reservoirs: introduction

¹ Amerada Hess Ltd, 33 Grosvenor Place, London SW1X 7HY, UK
² Department of Earth Sciences, University of Cardiff, and Consultant, Gwynedd Oil and Gas, Meifod ISA, Dyffryn Ardudwy, Gwynedd LL44 2DS, UK
³ Department of Trade and Industry, 86–88 Guild Street, Aberdeen AB11 6AR, UK

The first 20% of the full text of this article appears below.

This thematic set of papers is from a Geological Society Petroleum Group Conference on the subject held in London in February 1999. The first question we had to address in organizing the conference was: what was a low permeability reservoir?

The conventional wisdom in offshore developments is to use permeability cut-offs of 1 mD for oil and 0.1 mD for gas to define net pay. A good working definition of a low permeability reservoir would then be one whose permeabilities were around these values.

Howard Johnson, in a keynote address to . . . [Full Text of this Article]