Production district Holstein, which consists of the artificial island Mittelplate and the land station Dieksand, belongs to the most productive areas in central Europe. The Mittelplate oilfield has been on production since 1987 and is this year being connected to the onshore station via pipeline. In addition, the island is also upgraded in terms of capacities and machinery. Beside the technical challenge and the increasing costs of work and equipment, energy considerations and predictions are some of the major issues related to these operations. Energy management, which is becoming more and more important in the petroleum industry, can save a company a lot of money. On a global basis, energy concerns have not been taken seriously in the past, although for the last few years, energy was identified to be one of the main cost drivers in the overall production costs of an oil company. In the case of production district Holstein, it was possible in the past to cover a large amount of energy from the power generated by two gas-turbines installed on the island. Speaking in terms of gas in dependence of oil production, a certain amount of energy can be generated that is influenced by several factors. This energy might not be able to provide all consumers of the production district with power, but should at least help to minimize energy supply by external utilities, which will produce costs that have to be critically questioned and considered for future operations. This thesis should provide some details about the process of energy generation at Mittelplate depending on production rate. Another important discussion will be done on energy and power demands of consumers and machinery considering such factors as production, injection or different drilling operations. It will be seen that by optimizing the order of processes more money can be made by keeping production at a high level, while at the same time money can be saved by demanding less energy.