However, the smallness of the fields means the channel sand
reservoirs can usually be correlated, and thus likely to be in communication, across the whole field.
Lithofacies associated with microtidal environments are tidal channel sand
, sand-dominated heterolithic mud and mud-dominated heterolithic sand deposits.
A comprehensive fish and sediment sampling effort was conducted at the central San Juan Channel sand
wave field, a region where bottom currents have shaped the seafloor geomorphology into a series of successive crests and troughs at depths of 60-80 m to determine sediment associations of Pacific sand lance in offshore waters.
As in the case of Jubilee and the other Tano Basin discoveries, the OCTP block discoveries are Cretaceous-age channel sand
deposits accumulating light oil and gas/condensate in stratigraphic traps.
With good physical properties of the channel sand
reservoir, in the case of injection production, the water channeling occurred along the high permeability channel in the injection-production well, the water flooded in the first place, the formation of high permeability channel, and its adjacent non-main channel sand
, front sand and other physical properties of the reservoir with low oil saturation, low level of reserves, the formation of the remaining oil enrichment (Fig.
The "Dyna" sheet sand and the "Doris" channel sand
were both present and of good quality but both have been interpreted as being water bearing.
Birkhead Formation Channel Sand
Oil Discovery - Preliminary volumetric assessment suggests between 800,000 (Best) to 1.2 million (High) barrels of gross oil in place oil in the Birkhead Formation sands (see map in linked document below showing preliminary outline of Arno-1 oil discovery).
The company noted that the well is targeting an amplitude supported channel sand
complex of late Eocene age.
In addition, the pumps' neoprene bearings channel sand
and other abrasive particles away from the shaft.
Following the drilling of the Jacana 8 appraisal well in the first quarter of 2017 to test a channel sand
in the Mirador formation, which had not previously produced oil in the Jacana oil field, a test conducted with an electric submersible pump resulted in a production rate of approximately 1,850 bopd of 24.0 degrees API, with 0.4% water cut, through a choke of 32/64 mm and wellhead pressure of 100 pounds per square inch.
Apart from some shallow lignite hosted anomalous uranium encountered along the southern part of the palaeochannel at Highway North, the geological controls and style of the channel sand
hosted uranium mineralisation at Highway and Highway North are similar to the mineralisation encountered at Stallion.
ROC will now seek to bring in a new partner to participate in the drilling of the Aleta prospect, an interpreted Cretaceous channel sand
body with stacked potential reservoirs.