http://www.offshore-mag.com/index/article-display/4379153306/articles/offshore/volume-71/issue-5/international-report/success-continues-off-brazil-while-falklands-show-increasing-promise.html
Falklands
Rockhopper Exploration says it has proven a substantial oil column in its Sea Lion discovery in the North Falkland basin. Its latest appraisal well (14/10-4) encountered 33 m (108 ft) net pay in a good quality reservoir. It also established an oil/water contact at 2,477 m (8,127 ft) TVD subsea in the main fan, which suggests that the southern main Sea Lion fan is full to spill.
This latest well aimed to investigate reservoir presence and the oil column at a downdip location. The results were close to Rockhoppers geological prediction.
Top Sea Lion reservoir sands were encountered 66 m (216 ft) downdip from the 14/10-2 well, 2.3 km (1.4 mi) to the southeast. The program revealed 107 m (351 ft) of reservoir comprising four main sands, with average porosity of 20% and permeability of over 100 md.
Rockhopper says 30 m (98 ft) of net pay were intersected in the upper of the four sands, representing the main Sea Lion southern fan. The gross oil column now proven in the main Sea Lion southern fan is 104 m (341 ft).
In the lower sands, some 3 m (9.8 ft) of net oil pay were present. These thin sands are below the water leg of the upper sands, suggesting the presence of at least one additional oil column. They also confirm prospectivity for lower fan sequences developed elsewhere downdip.
A mini-drillstem test was conducted using a dual-packer MDT tool over a 1-m (3.3-ft) interval at 2,486 m (8,156 ft) drilled depth within the oil column. This test flowed oil into the wellbore, providing additional samples and pressure build-up data, which suggest that flow rates and producibility here are better than at the discovery well.
A single MDT sample chamber was opened on the rig and initial wellsite analysis indicates medium-grade oil similar to that in 14/10-2.
After plugging and abandoning the well, the semi Ocean Guardian will next drill the Ninky prospect in the same basin for Desire Oil, before reverting to Rockhopper to drill a minimum of three further appraisal wells on the Sea Lion feature, and possibly more, along with further exploration wells.
Rockhopper now plans to start development planning for Sea Lion.
Falkland Oil and Gas Ltd (FOGL) says it is at an advanced stage in contract negotiations for a deepwater rig for its Southern License area acreage offshore the Falkland Islands.
BHP Billiton, as operator of the companys Northern License area, is also in talks to secure a rig slot to drill the Loligo prospect.
Recently, the partners renegotiated the terms of the Northern License area with the Falkland Islands government. The permits have been extended by one year without any further work commitments or mandatory acreage relinquishments.
On the Southern License area, the Phase I work commitment was completed last year following an unsuccessful well on the Toroa structure.
BHP elected not to enter the second phase, which started on Dec. 3, assigning its 51% interest and operatorship to FOGL, which now has full control over these concessions, and may pursue another farm-out agreement.
FOGL has contracted a vessel to perform a site survey to determine locations for future wells. This will cover separate sites including the Vinson prospect, in the Tertiary channel play, and two new prospects (Scotia and Hero) within the mid-Cretaceous fan play.
Site surveys also will be acquired on Inflexible, a Springhill fault-block, and Undine, a Tertiary fold-belt play prospect. Springhill and Undine are similar to targets Borders and Southern intends to drill in the same region. FOGL will have the option to drill in the event that Borders and Southern has success with its wells.
FOGL may also opt to acquire up to 1,300 km (808 mi) of new 2D seismic data to enhance prospect definition and assist selection of drilling locations.
--------------------------------------------------------------------------------