Belayim Land oil field represents one of the giant oldest oil fields in the Gulf of Suez, which occupies an area of 113km2. It was discovered in 1954 and put on production the year later. The field reached its maximum daily production of 62,000 BOPD, and then declined to reach its minimum rate of 28,000 in 1983. Since that time, continuous exploration and development efforts have been spent to raise the production again till reaching 55,000 BOPD.The present paper displays the impact of 3D seismic technique applied in this mature field, which led to enhance the oil production and to reduce the operating cost.Petrobel exploration is implementing the up to date technology within the 3D seismic methodology, which covered most of Belayim land to upgrade the data quality and to increase the confidence in data interpretation. This resulted in minimizing the exploration risk and reducing the time and cost for production start up. This approach succeeded extending the field towards the west and south and adding new OOIP of about 250 MMSTB through six good discovery wells with a success ratio of 100%. In addition, development plane based on the new data allowed the drilling of new development wells in order to drain the by-passed oil and maximize the production.

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