Multiple Hydrocarbon Migration and Accumulation of TZ12 Structure, Tarim Basin
塔里木盆地塔中12构造复式油气运聚与成藏研究

TZ12 structure, an inherited paleo\|uplift during geologic epoch, is located in the central part of TZ10 structure. The show of oil and gas including fluorescence, oil slick, oil trace, asphalt and crude oil is quite active in many Silurian and Ordovician intervals. In addition, the industrial oil has been got in Silurian. The analysis reveals that the show of oil and gas, oil trace and fluorescence in Carboniferous may come from the underneath strata through fault leakage. The multiple oil/gas reservoiring process for Silurian and Upper Ordovician of TZ12 structure is discussed by analyzing fault seal, pyrrole nitrogen compound, source rock correlation as well as other scholars′ research on inclusion composition and homogenization temperature, which will help better understand the oil and gas distribution of Tazhong area. Moreover, the hydrocarbon pooling conditions of Lower Ordovician indicates that it′s quite likely to get industrial gas flow.