Society of Petroleum Engineers Home page of the Society of Petroleum Engineers (SPE). Paper abstracts available to members.
		American Association of Petroleum Geologists An international organization of more than 31,000 members in 115 countries.
		Energy Institute The Energy Institute (EI) is the leading professional body for the energy industries, representing almost 12,000 professionals both nationally and internationally.
		Society of Exploration Geophysicists Society of Exploration Geophysics, mainly petroleum exploration.
		DiaLog The London Petrophysical Society publishes DiaLog with articles covering technical and general information concerned with the wide subject of petrophysics and those who practice it.
		The Geological Society The UK National Society for Geoscience.  Gaffney, Cline & Associates is a Corporate Affilitate of the Society