Reservoir characteristics of Silurian in Tahe Oil Field

The Silurian oil and gas reservoir types include stratigraphic, lithologic and compound ones in the Tahe Oil Field. Studies indicate that the Silurian reservoirs have experienced multiple stages of hydrocarbon accumulation and reconstruction, which can be concluded as "multiple stages of hydrocarbon charging, multiple stages of adjustment, late-stage formation".The generation degree of structures and faults controlled the migration and distribution of oil and gas. The active stage of fractures in Silurian matched with hydrocarbon charging stage, and the generation degree of fractures controlled the migration and accumulation of oil and gas in Silurian. The favorable reservoirs of channel mouth bar and tidal channel facies determined the enrichment of oil and gas. The traps adjacent to the Silurian erosional pinch-out line are the gathering places of normal oil. The southern Tahe Oil Field is favorable for tectono-stratigraphic reservoir exploration. The Tuoputai area of the Tahe Oil Field is favorable for primary pool exploration.