The impregnated heights are respectively 40m in the Kissenda sandstone and 14m in the Base sandstone.
The first test, conducted at an 11m interval in the base sandstone, produced a flow of 1,000 barrels per day (bpd) of anhydrous oil on a ½ bean.
The second test, conducted at a 6m interval in the lower stratum of the Kissenda formation yielded no results.
The third test, conducted at a 24m interval in the upper part of the Kissenda formation, produced a pumped discharge of 130 bpd of anhydrous oil, suggesting reservoir depletion during the drilling.
The quality of the discovered oil is intermediate between that of ONAL and OMKO.
Subsequent to these results, studies were undertaken to evaluate this discovery and devise a long-term test on the well.
OMKO-104
This well, drilled 2.5 kilometers west of the OMKO-101 well, is intended to explore an independent structure in the OMKO field. The well has reached the Kissenda sandstone and Base sandstone. Tests have only yielded formation water.
This well has nevertheless demonstrated the extension of the Kissenda sandstone deposits and the good quality of the Base sandstone.
The presence of indications of oil in the top of the reservoir lets hope for a potential on the upstream part of the structure.
This well will be used for water production or as a re-injection well for the OMKO field, the extent of which will be delineated by the OMKO-102 and OMKO-103 wells.
The company will now direct its exploration efforts on the prospects of OMTI and OMSN, located at the north of the Omoueyi exploration permit.
Tanzania
Mafia Bigwa Rufiji permit (60% operator)
Drilling of the Mafia Deep ST-1 well was temporarily stopped at a depth of 5,519m.
From this level, a cork of cement of 360m height was put and a liner 7 ‘ cemented.
These operations, necessary to security measures for the levels of gas discovered, will be followed by an ultimate drilling operation which will allow evaluation of the gas zone under the current cement. In the aftermath, a programme permitting testing of the various levels of gas revealed by electric logs will take place throughout several weeks.
It will be possible to make an evaluation of the resources at the end of all these operations.
In addition, in August 2009, drilling will commence on a new exploration well in the Delta Rufiji. This new prospect, revealed by the seismic survey conducted in 2008 and interpreted in 2009, will be drilled at a depth of 2,000m. The target of this prospect would possess the same potential as Mafia Deep ST-1.
