Accumulation condition and exploration potential of low porosity and ultra-low permeability sandstone gas reservoirs on the depression slope belt of Yinggehai basin
This paper,through comprehensive analysis on geochemical,reservoir,seismic,well logging and formation testing data,investigated characteristics of the gas reservoirs discovered in Ledong area channel fillings on the depression slope belt,Yinggehai basin and its geological conditions of gas accumulation.The result shows that the Miocene gas reservoir in this zone has characteristics ofthree low(low porosity,low permeability,low gas saturation)&one high(abnormal overpressure)and slow fluidity,which is similar...