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AAPG GEO 2010 Middle East
Geoscience Conference & Exhibition
Innovative Geoscience Solutions – Meeting Hydrocarbon Demand in Changing Times
March 7-10, 2010 – Manama, Bahrain

Integrated Reservoir Analysis and Geochemistry Leads to Increasing Production from Underdeveloped Reservoir in the Bahrain Field

Nayera K. Abdulla1; Najla Nedham1; Challa R. Murty1; Yahya Al Ansari1

(1) Petroleum & Exploratin Dept., Bahrain Petroleum Company, Manama, Kingdom of Bahrain, Bahrain.

Since the Bahrain field was discovered in 1932, the main focus of development was on major formations of the field, leaving shallow formations not fully exploited. Today with the increase in oil price and the depletion of major formations, there is a greater need to consider increasing production from these under developed zones.

This case study describes the measures applied with the purpose of increasing production from the Magwa zone, which is the most economically attractive of the shallow zones. The zone is the basal member of the Rumaila formation of the middle Cretaceous Wasia group. It is predominantly limestone with interbeded shale. An integrated methodology was adopted to enable a better understanding of the reservoir production behavior and to explain the lateral heterogeneity of the formation. This investigation was triggered by the variation in the formation water salinity from North to South. Water saturation maps, rock type, production history, geochemistry and structural set-up were used as the main inputs in this analysis. The interpretation of trends between these factors were used to explain the behavior of the reservoir. The outcome of such investigations is of critical value in determining the location of new development wells, selecting candidate wells for recompletion and planning for EOR processes.

This paper will explain how a better understanding of the reservoir through data integration has resulted in a significant increase in oil production.