Project Profile
Value: Undisclosed
Location: Arabian Sea around 160km west of the Mumbai coast, India
Start-up Year: October 1976 (originally), new construction will commence early 2013
Reserves: 1,659 million metric tonnes (MMT)
Production: 9-10 million tonnes of oil equivalent per year
Bombay High (now Mumbai High) is an offshore oilfield located in the Arabian Sea around 160km west of the Mumbai coast. Discovered in 1974, the field has been operated by Oil and Natural Gas Corporation (ONGC). Production at the field started in 1976. The oil field consists of two blocks named Mumbai High North (MHN) and Mumbai High South (MHS). The blocks were divided based on shale barrier assisting in independent exploitation of reserves at the north and south fields of Mumbai high. Currently, the field has 1,659 million metric tons (MMT) and is producing around 12MMT a year. The company\'s board granted approval for the second phase of Mumbai High North (MHN) Redevelopment project in January 2009.
The redevelopment plan has been divided into two phases. The first phase started in 2000 and was completed in December 2006. The phase I is expected to yield an additional crude oil production of 23.25 MMT of crude oil and 6.10 BCM of gas by 2030, from 73 new wells and ten side track wells drilled. Phase II redevelopment of Mumbai High is going on and bout INR 90,000m will be pumped into it over the next 3-4 years. The cumulative oil production from phase I redevelopment wells was 9.34MMT and cumulative gas production was 2.89BCM until March 2008. The field reached its peak of production of 400,000bopd (barrels of oil per day) in 1985 and continued at same rate until 1989.
Decline in oil and gas production led to the need of a redevelopment plan. The production declined gradually and reached 220,000bopd in 2001 and 10 million metric standard cubic metres of gas per day (mmscmd or mmcmd). onGC invested around INR80,000m under phase I for enhancing the efficiency and controlling the decline in oil and gas production. Under phase I, 29% of 1,659 million tons of total reserves were improved.
Phase II redevelopment, announced in 2009, will result in an additional crude oil production of 17.354 MMT and Natural Gas 2.987 Billion Cubic Metres (BCM), totalling to 20.34MMT of oil equivalent by March 2030. The phase II of MHN redevelopment plan targets to further enhance recovery rate from Mumbai High by focusing on drilling of 73 new wells and side tracking of 38 poor producers. The development of small reservoirs such as L-II and L-I has been combined with major reservoir L-III to strengthen oil production and development programme. The second phase of Mumbai High North is expected to complete by September 2012 and cost of redevelopment will be INR 71,333.9m.
Infrastructure:
onGC started construction of new process complex MHN near the old Bombay High North (BHN) platform during 2007. Due to a major fire in July 2005, the BHN platform was completely destroyed, which affected oil production. Along the field\'s redevelopment plan, the new MHN complex is developed handling around 255,000 barrels of liquid including 48,000 barrels of oil per day and 6.8mmcdm of gas. The MHN process complex consists of a process-cum-riser platform, a living quarter, a subsea-connected flare structure, subsea pipelines and adjoining topside modifications such as facilities for handling sour gas from B series marginal fields. The new MHN complex project was completed in 2010 and ensured optimised and safe operations at the project field.
Pipelines:
onGC approved construction of 7 pipelines with risers and associated top-side facilities in Mumbai High North in April 2007. It involved investment of around INR 3,550m. These pipelines were vital for optimum utilisation from Mumbai High. It is connected to new MHN complex and was completed in May 2010. The field is exploited using the gas lifts method, a major artificial lift method used for oil production. Several gas compressors spread over the number of process complexes in the field to support the broad gas lift network.
Plans:
onGC envisages a total crude oil production of 202.42MMT by 2030. The company is trying to improve the recovery rate by 40% by 2040. Further, the field will require additional liquid production with an 80% water cut in 2015 and a 95% of water cut by 2025. onGC is installing electrical submersible pumps in 81 oil wells in the field. The ESP installation is scheduled to complete in August 2012 and will increase the oil and gas production levels by 5.21MMT and 0.79 billion cubic metres respectively by 2024.
Operators:
onGC (Oil & Natural Gas Corporation): Operator with 100% interest
Contractors:
Afcons-Gunanusa Joint Venture (AGJV)
Hyundai Heavy Industries (HHI): Build and install an offshore gas processing platform
Larsen & Toubro: Installation of platforms and pipelines in offshore
Leighton Welspun: Refurbishment work of Water Injection North (WIN) Platform
McDermott: EPCI contract
National Petroleum Construction Company (NPCC): EPC of Platforms 14 \'&\' 16
SapuraCrest Petroleum: Installation of platforms and pipelines in offshore
Valentine Maritime (Gulf) LLC: EPC contract
L&T Hydrocarbon Engineering Limited (LTHE): An offshore contract the Oil & Natural Gas Corporation (ONGC), won against international competitive bidding, including engineering, procurement, construction and installation of five wellhead platforms
SapuraKencana Petroleum Berhad (through iwholly-owned subsidiary company, Kencana HL Sdn Bhd): Contract by Oil and Natural Gas Corporation (ONGC) for the Mumbai High South Redevelopment Phase III Project on a turnkey basis. The scope of work includes but not limited to surveys, design, engineering, procurement, fabrication, transport and installation, hook-up, and commissioning of three new Well Head platforms, around 116 kilometres of submarine pipelines, around 7.5 kilometres of submarine cable, modification works on existing platforms including clamp-on works on two platforms, subsea repair works on three jackets and D1C pile remedial works. The Contract value is approximately US$273 million including taxes and duties, and excluding the service tax in India. The contract agreement was signed by both parties and executed on June 27, 2015 at Mumbai, India. The overall project completion is scheduled on April 30, 2017.
NPCC: Well platform life-extension services and replacement of wellhead platform topsides. (November, 2016)
Sub Contractors:
Aker Solutions (Aker MH India Pvt Ltd): Modification of 59 offshore platforms
Hallin Marine: Diving Services for Leighton Welspun
J. Ray McDermott: Installation services
Kawasaki Heavy Industries: Provide three gas turbine-driven compression trains and engineering services
Specialist Services: EPPM of 150 man living quarter, switch-gear and turbine generator modules
Supreme Offshore Construction & Technical Services Ltd.
Unique Hydrographic Systems: Seaflex Air Lift bags ordered by Leighton Welspun