Among the highlights, Orca intercepted 123m at 1.96g/t gold and 50m at 3.05g/t.
The company had upped the project's resource in January to an indicated 3.05 million ounces of gold and has a feasibility study due out in May.
"Although the drill database had to be cut off at the end of 2017 for the purposes of our feasibility study, we are confident that ongoing drilling this year will materially increase resources in the current designs and significantly add to the global resource at GSS," CEO Richard Clark said.
The new modelling was partly based on a reinterpretation of previous drilling, and 25 of 27 holes drilled to date on the new azimuth successfully intersected mineralisation, some in areas where the block model had lacked data and the material was regarded as waste.
The current drilling programme has also delivered strong results from the Wadi Doum area at Block 14.
Orca shares rose 10% yesterday to C66c, capitalising the company around $103 million.