Main Controlling Factors of Volcanic Reservoir in Carboniferous Kalagang Formation,Santanghu Basin

Main hydrocarbon accumulation controlling factors of volcanic reservoir in carboniferous Kalagang formation,Santanghu basin were analyzed.It’s considered that favorable lithology and lithofacies,effective source rock,deep fracture and accompanying cracks,certain reworking role in later stage control the hydrocarbon accumulation of volcanic reservoir.Amygdaloidal andesite and basalt of outflow facies near the crater are favorable lithology and lithofacies for volcanic reservoir.Effective source rock is material base for hydrocarbon accumulation.Deep fractures and accompanying cracks are important factors for linking oil sources and enhancing reservoir channel capacity.Certain reworking role in later stage is the key for improving the reservoir property.