Reservoir prediction of Carboniferous Kalashayi Formation in Sangtamu block, Tahe Oilfield

The Carboniferous Kalashayi Formation in the Tahe Oilfield is one of the most important oil-bearing formations in the area. Sandbodies are characterized by small thickness and great lateral variation. A thorough understanding of its spatial distribution is crucial to exploration and production. To tackle the problem, the researchers studied the banded seismic anomalies developed in the sand groups Ⅰ, Ⅱ, Ⅲ with low sand/formation ratio in the Kalashayi Formation based on the high-resolution data from the Sangtamu block. Combined with well data, using strata slice, spectrum color mixing, coherence cube and seismic attribute techniques, a reservoir prediction method was proposed to identify Carboniferous reservoirs, and was proved effective.