This paper describes the development of integrated (production) water management in Petroleum Development Oman. In its existing oil fields the water cut is rising rapidly and water production is expected to increase two to three times in the next 15 years. Reinjection of production water will continue to account for less than half of the volume of co-produced water.

Current subsurface disposal of production water to shallow Tertiary formations is based on thorough knowledge of the local hydrogeology and does not affect potable water resources. However, in view of the expected increase in production water volume, utilisation and disposal options have been re-evaluated.

This review has been facilitated by recently acquired data on production water quality and by the results of research in dehydration and de-oiling technologies and of tests with production chemicals. The combined knowledge base is used to arrive at water management strategies for individual oil fields that are sound both in principle and in practice.

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