The use of computers as primary tools for carrying out geological research and databases for storing geological information has grown considerably in recent years. In the same period there has been a dramatic increase in the degree of collaboration between scientific institutions, universities and industry, and between geologists working in different countries. To facilitate collaborative work amongst geologists and to maximise efficiency in the use of geological databases a common approach to classifying and naming rocks is essential. This publication presents a scheme for the classification and nomenclature of igneous rocks that is practical, logical, systematic, hierarchical and uses clearly defined, unambiguous rock names.

The use of computers as primary tools for carrying out geological research and databases for storing geological information has grown considerably in recent years. In the same period there has been a dramatic increase in the degree of collaboration between scientific institutions, universities and industry, and between geologists working in different countries. To facilitate collaborative work amongst geologists and to maximise efficiency in the use of geological databases a common approach to classifying and naming rocks is essential. This publication presents a scheme for the classification and nomenclature of metamorphic rocks that is practical, logical, systematic, hierarchical and uses clearly defined, unambiguous rock names <...>

Historically, geophysicists ted the results of their work to exploiation geologists, who then ted their conclusions to development geologists, who in turn fed the results of their studies (maps) to peti oleum engmeeis, who used the maps, in conjunction with measurements in wells and on samples taken from wells, to develop and produce oil and gas fields.

Reservoir stimulation and artificial lift are the two main activities of the production engineer in the petroleum and related industries. The main purpose of stimulation is to enhance the property value by the faster delivery of the petroleum fluid and/or to increase ultimate economic recovery. Matrix stimulation and hydraulic fracturing are intended to remedy, or even improve, the natural connection of the wellbore with the reservoir, which could delay the need for artificial lift. This chapter outlines stimulation techniques as tools to help manage and optimize reservoir development.  Understanding stimulation requires understanding the fundamental issues of petroleum production and the position and applicability of the process. <...>