oa Chimney Detection as a Tool in Hydrocarbon Exploration and Prospect Evaluation: A Case Study from Iran

Finding new prospects with the lowest exploration risk is the main aim of hydrocarbon exploration.<br>Chimney detection is a technique which can be used as an exploration tool that provides important<br>information for prospect evaluation and charged or non-charged prospects identification.The petroleum<br>system activity can be established by this technique.It provides the spatial link between source rock,<br>reservoir rock, spill-points and geohazards.<br>The method applies multi trace seismic attributes, neural network modeling and the interpreter's<br>insight. It is necessary to integrate the chimney technique with geological information to get correct<br>and comprehensive results.<br>Gas chimney is a chaotic and noisy part of seismic data, where the continuity of reflectors is missing .It<br>often contains many very small reflectors, dipping in every direction. This study has been done to<br>determine how gas chimney detects hydrocarbon existence in underlying structure.<br>At first, seismic interpreter selects chaotic parts of seismic section as chimney and background as nonchimney,<br>the interpreter's knowledge and expert view help to choose these pick points.