Oilex Provides Update on SPA 17 AO Acreage in WA's Canning Basin

STP-EPA-0106 and 0107 Play-types and Leads

Concurrent with the Survey data acquisition and interpretation, Oilex has completed an initial interpretation of the available 2D seismic data in STP-EPA-0106 and STP-EPA-0107 and compiled an extensive well log dataset for the greater Canning Basin. This effort has identified a range of large structural and stratigraphic leads. These play-types are expected to continue into SPA 17 AO. Some examples of conventional plays of probable Ordovician and Devonian age include:

Rift-Bounding Fault Fan Systems

A number of features with the geometry of well-defined fan systems are interpreted along the down-thrown side of the main rift-bounding fault. Basal incision, differential compaction and internal channelling are interpreted from the seismic data indicating favorable reservoir facies may be present. The seismic character indicates interbedded units of contrasting density and sediment thickness is interpreted to be approximately 1,312 feet (400 meters) thick in some locations with the fans having an areal extent up to 18,532 acres (75 square kilometers) in some cases. A combination of structural rollover into the main fault and lateral facies variations indicate a viable trapping mechanism and are analogous to the successful primary play-type in the East African Rift. The fans appear to be stacked vertically or overlapping and multiple fan systems could be intersected by a single vertical well.

Channel Systems

Two north-west/south-east trending elongate features have been identified on the 2D seismic data and are interpreted to be basin axis channel sequences. The seismic character suggests an interbedded section of a nature similar to sands being redistributed along the basin axis at the toe of the fan. Erosional incision and depositional fill can be interpreted across the entire seismic grid and these systems are interpreted to extend beyond the area of the current seismic control.

Mid Graben Ridge

A large tilted fault-block extending for 15 miles (25 kilometers) extends along the central graben area on the passive side of the graben resulting in a structural trend with considerable vertical relief. Structural closure occurs at multiple levels and the potential for the development of possible younger reef systems along the crest of the trend may contribute to its prospectivity.


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