STUDY ON THE THERMAL EVOLUTION OF THE MUDSTONE FROM LINXI FORMATION IN TAOHAIYINGZI, INNER MONGOLIA

Recent researches around Song-Liao Basin reveal that the Linxi Formation is one of the most potential hydrocarbon layers in Daxinganling region. The Linxi Formation, occurring as a series of thick black mudstones, is distributed widely in Taohaiyingzi area. With analysis on the vitrinite reflectance and illite crystallinity of mudstone samples collected from outcrop and wells, the thermal evolution of organics of the black mud stone from Linxi Formation is researched. The result shows that the thermal evolution of the organic matter has passed the principal stage, but not entered the metamorphic stage yet, suggesting a good exploring prospect for shale gas.