ONGC Board Okays Major Arabian Sea Investments

The Board of Oil and Natural Gas Corporation Ltd. (ONGC), in its 163rd meeting held on Tuesday, approved investment proposals to the tune of Rs 6152 Crore for following major projects in Western Offshore (off India's western coast). Western Offshore contributes around 71% of the total Oil & Oil equivalent Gas of ONGC.

Construction of New Process Complex MHN:

The project is for construction of a new process complex MHN near old BHN platform at the cost of 2853 crores. A major fire accident took place in Mumbai High North field on 27th July 2005 and completely destroyed the BHN process platform thereby disrupting oil production from the entire North field but also affected part of production from South field. To realize the full potential of production from the Mumbai High North field including re-development projects currently under execution and future prospects, it was felt prudent to construct a new process complex at the same location. The new process complex envisages facilities for handling around 255,000 barrels per day (BPD) of liquid including 48,000 BPD of oil and 6.8 MMSCMD of gas.

Process complex MHN consist of a process-cum-riser platform (MNP), a living quarter platform, a sub-sea connected flare structure (MNF), sub-sea pipelines and associated topside modifications including facilities for handling sour gas from B-series marginal fields. The new complex is optimized and designed for safer operations. The project is scheduled to be completed in 40 months.

Development of B-22 Marginal Fields Cluster

ONGC has ventured into the next phase of development of marginal fields near major process complexes. In line with this the instant project is for the development of B-22 marginal fields' cluster including BS-12, BS-13 & B-149 located west of the giant South Bassein gas field in Western Offshore at the cost of Rs. 2323 crores. These are primarily sour gas fields whereas B-22 is also oil bearing.

The cluster is planned to be developed through 10 gas wells and 6 oil wells including 2 wells of BF platform of South Bassein field. The infrastructure includes one well cum process platform, two tripod well platforms, 56.5 km sub marine pipeline of different sizes & modification at BB and BF platforms of South Bassein field. The project is scheduled to be completed in 44 months.

The expected peak production rates of oil, condensate & gas are of the order of 8200 BPD, 6700 BPD & 4.5 MMSCMD and the cumulative production is to the tune of 2.46 MMT, 1.13 MMT & 6.56 BCM respectively by 2020.

New Uran-Trombay Gas Line:

Under this project, a new 20" Uran-Trombay gas pipeline will be laid as a replacement of existing line at the cost of Rs. 236 crores.

The existing 24 km line supplies gas from Uran to Trombay Sector consumers including Mahanagar Gas Ltd for domestic supplies & public transport as CNG. The new line shall be able to transport 6 MMSCMD gas to cater to the future increase in demands in this sector.

The new line shall be designed for Class#3 requirements along with metering & terminal facilities due to increased activities around its route.

A part of the pipe line passes through sea near Trombay and shall be completed by May 2008.

Offshore Grid Interconnectivity Project & Installation of ESP on Well Platforms in Mumbai High Field

The purpose of this project is to lay high voltage submarine composite electrical cable to connect various process platforms of Mumbai High to facilitate interconnectivity of power generating system. The cost of the project is around Rs 740 Crores.

The project components also include laying of submarine electrical cable to interconnect 26 well head platforms, installation of electrical submersible pumps (ESP) in 81 oil wells and associated surface facilities. The ESP shall help to increase oil production from high water cut (90-95%) wells of Mumbai High field. This is an induction of new technology in Western Offshore. Additionally, it will also lead to net saving on high pressure compressed gas to the tune of 3 MMSCMD.

The project is scheduled to be completed by March 2012. The incremental gain of oil and gas through this will be in the order of 5.21 MMT and 0.79 BCM respectively by 2024.

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