The Zama-2 appraisal nicely is the primary of three appraisal penetrations drilled by the Consortium to raised outline the useful resource potential of the Zama discovery. The Zama-2 appraisal penetration was drilled in a down-dip location roughly 1.Three miles to the north of the Zama-1 discovery nicely in an effort to substantiate the geological mannequin and outline the oil-water contact. This preliminary part of the appraisal program was efficiently and safely accomplished on January 20, 2019, roughly 28 days forward of schedule and 25% beneath initially projected prices. The nicely reached the highest of the Zama reservoir at roughly 10,759 toes (Three,279 meters) of true vertical depth (“TVD”) and has encountered the next:
A contiguous Zama sandstone interval of 1,676 toes (511 meters) of gross TVD sand, materially thicker sand than the Zama-1 discovery nicely and barely thicker than the pre-drill estimates for the Zama-2 nicely. The nicely additionally encountered a number of different thick, moist sands of comparable age straight beneath the principle Zama horizon for an combination complete of roughly 2,350 toes (716 meters) TVD of top of the range Upper Miocene sands with rock properties much like analogous Upper Miocene sands within the US Gulf of Mexico.
The Zama-2 penetration logged roughly 581 toes (177 meters) of gross TVD oil pay earlier than reaching the oil-water contact, preliminarily estimated at 11,254 toes (Three,430 meters) TVD, roughly 100 toes (30 meters), deeper than the anticipated depth of the oil-water contact based mostly on the geophysical signature referred to as a “flat-spot.” The preliminary Net-to-Gross issue on this pay interval ranges from 68-73%, with rock properties consistent with these on the Zama-1 location.
Preliminary strain information helped verify the oil-water contact depth, complementing the standard logging outcomes. The strain information additionally signifies that this northern part of the reservoir is linked to the Zama-1 discovery nicely. The Zama-2 vertical sidetrack and the Zama-Three nicely will present further details about the reservoir connectivity and consistency.
The final goal of the Zama-2 nicely was to check a deeper exploration prospect referred to as Marte. Marte was designed to inexpensively take a look at the next danger stratigraphic entice, and though it encountered top quality sands of constant geological age, pressures and high quality, they weren’t hydrocarbon bearing. The data gathered, nonetheless, helps the Consortium with the analysis of the aquifer help of the principle Zama reservoir and different doable prospects on Block 7. The testing of Marte, initially anticipated to value roughly $ million, was considerably underneath finances and solely value roughly $2.5 million, each on a gross foundation. The whole value of the Zama-2 nicely, together with the extra value to check the Marte prospect, will probably be recoverable when business manufacturing from Zama commences.
The appraisal program will proceed subsequent with an up-dip vertical penetration within the Zama reservoir from the principle bore gap of the Zama-2 nicely, which will probably be cored and a drill stem take a look at will probably be carried out. The second appraisal nicely, Zama-Three, will probably be drilled to the south of the unique discovery nicely and can assist delineate the reservoir continuity and high quality within the southern a part of the sector and will probably be cored to be higher perceive the reservoir geology. (Source: Talos – Ensco 8503)


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