The use of microcomputers in the petroleum industry is growing rapidly; and word processors, spreadsheets, data bases and engineering programs are the most popular types of software being used. This paper presents the results obtained using a combination of commercial software and engineering application programs developed at West Virginia University. Two major types of this combined application are described in case studies. The first case uses a spreadsheet as both a storage area for well data and as a method for information analysis and presentation. Advantages gained include ease of operation, cost reduction and time savings. The second case combines an engineering program with a Monte Carlo simulation technique to evaluate reserves. The procedure is readily performed with a microcomputer and allows rigorous statistical testing of results obtained using the limited data commonly available. Computer usage of the types discussed could lead to faster and cheaper reserves analysis and thereby to more effective development and recovery of our petroleum resources.