CHARACTERISTICS OF MESOZOIC-PALAEOZOIC MARINE CARBONATE RESERVOIR IN THE SOUTH YELLOW SEA BASIN AND HYDROCARBON ACCUMULATION:COMPARISON BETWEEN THE SICHUAN BASIN AND THE SUBEI BASIN

Comparison of drilling, logging, core and outcrop data is made for the Mesozoic and Paleozoic carbonate reservoir in the Sichuan Basin, Subei Basin and the South Yellow Sea Basin, in order to reveal the similarities and differences of hydrocarbon accumulation in these basins. There are four kinds of reservoirs in this region, i.e. the porous dolomitic reservoir, reef-bank reservoir, weathering crust reservoir and fractured reservoir, and four kinds of hydrocarbon accumulation, namely the Weiyuan type, the Anyue type, the Wubaiti type and the Puguang type. It is predicted that the four types of hydrocarbon accumulation may all occur on the Laoshan Uplift of the South Yellow Sea Basin.