Abstract
Abstract In almost any environmental report of oil companies one can find emission data of E&P activities. Apart from the enormous expenditure, caused by data acquisition, the quality of results is doubtful. Because of many different emission factors for calculation of harmful emissions only few limits are set to manipulation of results. In addition simply announcement of results offers no potential for appraisal of data. The first step to get a better data basis of possible environmental influence in hydrocarbon exploration and production are field measurements. The poster presented is focussed on measurements of methane concentrations in air. Methane is volatile and the best indicator for losses ore leaks in hydrocarbon production, especially in natural gas production. Enhanced methane concentrations (concentrations higher than the natural level of about 2 ppmv methane in air) are an indicator for several human made air pollution, e.g. rice or cattle cultivation, coal mining or natural gas production, but also can arise from other natural sources. The locally ground level of methane in air has therefore carefully to be checked before one starts with measurements of additional methane concentrations coming from hydrocarbon production.
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