Daleel Petroleum LLC operates the Block-5 concession in Northwest Oman located approximately 110 km southwest of Ibri.

In 1986 Daleel oil field was discovered by JAPEX OMAN in its concession area , BLOCK-5. In July 1990, the production was started from the field using EDF installation. In December 1991, the construction of the permanent production facilities was completed and the production was switched over to the new Daleel Production Station (DPS).Most of the associated natural gas is treated and fraction of it is flared. Treated gas is used as fuel gas to run the power generators, injection pumps and as blanketing gas. Recovered hydrocarbon liquids NGL is spiked in the crude oil stream and LPG is marketed in the region.

To enhance oil recovery from the reservoir, Daleel Petroleum has embarked into the implementation of a full field waterflooding project and will drill a series of exploration wells and production wells within the Block-5 concession area. Accordingly all related facilities will be either upgraded or newly installed to meet the requirement of such waterflood project.

Access to PDO crude transport system is capped at 25,000 bopd as per the Transport Agreement between PDO and Block 5 operator which was extended in May 2005 to year 2028 .