Introduction

Abstract

This atlas provides data on formation water compositions from throughout the North Sea Basin. It is intended for a varied audience with different needs: production chemists for scale prediction, petrophysicists for estimation of water resistivity and geochemists and geologists for the interpretation of water compositions and basin plumbing. The objective at the outset was not simply to provide a table of water compositions, but to supply as much supplementary data on reservoir conditions and geological setting as possible to enable the individual data to be placed in context. The atlas contains four main sections: a field compendium, comprising a field-by-field compilation of water compositions with accompanying geological description and field maps; a water resistivity (R w ) atlas updating a 1989 publication by the Society of Professional Well Log Analysts (Amiard & Harrison 1989); scale prediction maps estimating susceptibility of produced waters to scaling; and a water chemistry atlas containing maps and figures illustrating the spatial and stratigraphic distributions of water compositions. It has not been the intention here to provide interpretations of the data; the objectives are to make observations of major trends and clusters of data and to highlight anomalies. Problematic data are indicated within the field notes and consultation of these is strongly recommended. We wish to thank all those parties involved in the preparation of this volume. In particular: Mike Findlay and Stewart Brown of the Petroleum Science and Technology Institute, Edinburgh who helped with the data gathering process. Mike Collins of the Geological Society of London Publishing ... This 250-word extract was created in the absence of an abstract.