Geodynamics WorldWide, together with its partner, carried out a passive seismic survey for Greater Nile Petroleum Operating Company (GNPOC) in the Neem field in Sudan. It was the first time that this technology was applied in Sudan. The target area is located in the northern part of Block IV. The main purpose of this survey was to identify new well locations for the client and find the most prominent hydrocarbon potential zones using passive seismic results and reduce the drilling risk after integration with the available additional geophysical studies within the area. The passive seismic data acquisition was conducted in March-May 2011 and covered an area of 255 km2. The climatic condition of the place was characterized by high temperatures (+47°C ) and low humidity. With regard to the Health, Safety & Environment (HSE) policy, no particular accidents were reported during the field operations. Measurements over existing producing and non-producing wells, located within the target area, were taken to increase precision in calibration.