This book accompanies a videotape program of the same name. The combined videotape and book, referred to as a module of instruction, was one of three prepared by IHRDC on a joint basis with Mobil Oil Corporation during 1980. The three modules, one each in geology, geophysics and petroleum engineering, were produced to determine whether this medium of instruction would provide an effective way of teaching recent graduates and those individuals changing specialties, "what they need to know, when they need to know it." The major observations Of the pilot production stage were that properly designed and properly used, video-assisted instruction is effective, effiCient, and convenient. With the confidence that this instructional medium provides one way for the interna­ tional petroleum industry to train young graduates in exploration and production, IHRDC sought financial and advisory support from a limited number Of companies to undertake the development of the BaSiC Technical Video Library for the E&P Specialist. To date the following companies have agreed to serve as Sponsors: Mobil, AGIP, ARAMCO, Cities Services, Dome Petroleum Ltd., Gulf, Phillips, Standard Oil of California/ Chevron, and Texaco.