In what specific technological fields does PDG envisage to make complementary contributions?

There are potentially many, given the large band-width of technological know-how and capabilities of the PDG participating companies and institutes.

To name just a few:
Well and pipeline technology innovation, automation of field and process facilities, infrastructure development in low-lands, coastal settings and shallow water, heavy lift and marine transport, offshore and subsea technologies and processes, Low-pressure gas production (enhanced recovery), environmental and safety management.