Click to enlarge.

ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT Kosmos engaged the International Finance Corporation (IFC) early in the Jubilee Phase I Development by incorporating their high standards in the project design and operation, and accessing capital funds to execute project development. Kosmos and the IFC agreed on an annual action plan for the project, which includes disclosure of the Environmental and Social Impact Assessment (ESIA). Please click on the following link to view the Jubilee Phase I Development ESIA prepared for the Jubilee Unit operator. Download ESIA Download Adobe Acrobat PDF Viewer

Kosmos is Technical Operator for Development of the Jubilee Field offshore Ghana and heads the Integrated Project Team (IPT) that initiated phased oil production from the field on November 28, 2010. Jubilee crude is produced into and sold from the floating production, storage and offloading vessel (FPSO) “Kwame Nkrumah.” The FPSO leaves Singapore’s Jurong Shipyard for the 14,000-kilometer (9,400-mile) journey across the Indian Ocean and around the Cape of Good Hope to Ghana where it arrived in June 2010. Read more...

West Cape Three Points Block

Location: Gulf of Guinea’s Tano Basin, about 12 km (about seven miles) from the Ghanaian coastline and 95 km (59 miles) southwest of the port city of Takoradi

Size: 1,761 km² (435,200 acres) 

Water depth: 50-1,800 meters (approximately 165-5,900 feet) 

Contract: petroleum agreement

Working interest: 30.875% 

Operator: Kosmos Energy

Partners: Anadarko, 30.875% working interest; Tullow Oil plc, 26.396% working interest; Ghana National Petroleum Corporation, 10% participating interest; Sabre Oil & Gas Holdings Limited, 1.854% working interest

 

The West Cape Three Points Block has delivered world-class results to date and continues to offer significant potential for Kosmos. Wells in the area have demonstrated a working hydrocarbon system and the presence of high- quality reservoirs.

In 2004, Kosmos recognized the potential in stratigraphic pinch-out and combination structural traps located in well-developed channel systems. In early 2005, the company conducted a 1,075-km² 3D seismic survey to evaluate the play, define reservoir fairways and map trapping geometries.

In June 2007, the Kosmos Energy team discovered the Jubilee Field following the drilling of the Mahogany-1 exploration well in Ghana’s deep waters. This is the largest oil find in the last decade offshore West Africa. Building on their success, the team drilled the Odum-1 discovery well in early 2008, which confirmed a major oil province in Ghana’s western region of the Gulf of Guinea.

The Mahogany-1 exploration well discovered a significant oil accumulation based on the results of drilling, wireline logs and reservoir fluid samples . The find opened a new play fairway in the Tano Basin. The Mahogany-1 well encountered a gross hydrocarbon column of 270 meters (885 feet) with 95 meters (312 feet) of net stacked pay in a Cretaceous sandstone reservoir. The well, drilled in water depths of 1,320 meters (4,330 feet), reached a total depth of 3,826 meters (12,550 feet).

Drillstem tests of the Mahogany-1 discovery well and the Mahogany-2 and the Hyedua-2 appraisal wells have demonstrated that individual wells can produce more than 20,000 barrels of oil per day. Kosmos and its partners developed the Jubilee Field on an accelerated schedule and delivered first oil on November 28, 2010.

In addition, the Mahogany-3 well discovered Mahogany Deep (now included in Mahogany East), a new find of good-quality oil pay in an untested, stratigraphically deeper and separately trapped reservoir beneath the Jubilee Field. Subsequent appraisal drilling by the Mahogany-4, Mahogany-5 and Mahogany Deep-2 wells has defined the extent of those accumulations.

In February 2011, the Teak-1 exploration well made a hydrocarbon discovery on the block. Results of drilling, wireline logs and reservoir fluid samples show the Teak-1 well penetrated net oil-and-gas-bearing pay of 239 feet (73 meters) in five Campanian and Turonian zones of high-quality stacked reservoir sandstones consisting of 154 feet (47 meters) of gas and gas-condensate and 85 feet (26 meters) of oil. This was the second-highest net pay count encountered by any well on either the West Cape Three Points Block or the Deepwater Tano Block since the Mahogany-1 exploration well discovered the Jubilee Field in 2007.

In March 2011, the Teak-2 exploration well encountered 27 meters (90 feet) of net hydrocarbon-bearing pay in Campanian and Turonian reservoirs. The well targeted an undrilled fault block between the Jubilee Field and the Teak-1 discovery.

In June 2011, the Banda-1 exploration well made another hydrocarbon discovery on the block. The results of drilling, wireline logs and reservoir fluid samples show the Banda-1 well penetrated net oil-bearing pay of 3 meters (10 feet). The well penetrated a Cenomanian-age reservoir and opened a new play fairway not previously encountered on the West Cape Three Points Block or adjacent Deepwater Tano Block. Additional technical evaluation will be required to analyze the impact and extent of this new play discovery, which is deeper than existing Campanian and Turonian discoveries on Kosmos’ Ghana blocks.

The Akasa-1 exploration well discovered light oil in August 2011. A full analysis of well results, including wireline logs, reservoir pressures and fluid samples, confirmed the well penetrated 33 meters (108 feet) of oil-bearing pay in four good-quality Turonian-age sand packages. The Turonian reservoirs are similar in age to those discovered at Jubilee and Mahogany East. Samples recovered from the Akasa-1 well indicated oil of 38 degrees API gravity.

Kosmos plans to continue its significant drilling program of exploration prospects on the West Cape Three Points Block.

Deepwater Tano Block

Location: Gulf of Guinea’s Tano Basin, west of and adjacent to Kosmos’s West Cape Three Points Block in the Gulf of Guinea

Size: 1,106 km² (273,298 acres)

Water depth: 200-2,060 meters (approximately 656-6,758 feet)

Contract: petroleum agreement

Working interest: 18%

Operator: Tullow Oil plc

Partners: Tullow Oil plc, 49.95% working interest; Anadarko, 18% working interest; Ghana National Petroleum Corporation, 10% participating interest; Sabre Oil and Gas Holdings Limited, 4.05% working interest

 

In 2006, Kosmos entered the Deepwater Tano Block to extend the company’s position in the Tano Basin Late Cretaceous play fairway.

In 2007, Kosmos Energy’s Hyedua-1 well on the Deepwater Tano Block confirmed the company’s Jubilee Field discovery was a significant oil accumulation and demonstrated a sizable extension of the field. The Hyedua-1 well was drilled approximately 5.3 kilometers (3.3 miles) to the southwest of the Mahogany-1 discovery well, which is located on the adjacent West Cape Three Points Block.

The Hyedua-1 well encountered a gross reservoir interval of 202 meters (663 feet), which includes 108 meters (354 feet) of high-quality stacked reservoir sandstones and net hydrocarbon-bearing pay of 41 meters (134 feet). The results of logging and pressure testing suggest the reservoir sands are in communication with the Mahogany discovery, indicating combined hydrocarbon columns of 361 meters (1,184 feet) in a continuous accumulation extending across the Deepwater Tano and West Cape Three Points licenses.

In early 2009, Kosmos announced the successful Hyedua-2 appraisal well further substantiated that the Jubilee Field reservoirs are highly productive, continuous and connected.

In the first quarter of 2009, Kosmos and its partners drilled the Tweneboa-1 exploration well that discovered a light hydrocarbon accumulation. The Tweneboa-1 well penetrated net hydrocarbon-bearing pay of 21 meters (69 feet) in a single, good-quality sandstone reservoir similar in age to those found in the Jubilee Field. Subsequently, the Tweneboa-2 well successfully appraised the Tweneboa gas-condensate discovery and encountered an additional oil pool previously unseen. In January 2011, the Tweneboa-3 appraisal well successfully confirmed the Greater Tweneboa Area’s resource base potential. Data from successful drillstem tests conducted in August 2011 at the Tweneboa-2 and Tweneboa-4 wells is being used to optimize development plans for the Tweneboa/Enyenra complex.

In 2010, the Owo-1 exploration well and Owo-1 sidetrack well discovered a significant column of excellent-quality light oil in thick, high-quality sands. The sidetrack well intersected a deeper portion of the Owo channel system and confirmed that Owo (renamed Enyenra) is a significant new oil field. The Owo wells are located in the western portion of the Deepwater Tano Block adjacent to the Tweneboa discovery.

In March 2011, the Enyenra-2A appraisal well confirmed a downdip extension of the Enyenra Field discovered by the Owo-1 exploration well. The Enyenra-2A well also tested a distal portion of a deeper Turonian-age fan, suggesting the existence of hydrocarbons in the Tweneboa Deep prospect. In September 2011, the Enyenra-3A appraisal well confirmed an updip extension of the Enyenra Field and connectivity with the Owo-1 discovery and Enyenra-2A appraisal wells.

A significant exploration and appraisal drilling campaign is planned for the Deepwater Tano Block in 2011.