内蒙古陶海营子地区上二叠统林西组泥岩热演化程度研究

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

摘要: 近年来松辽盆地外围油气勘探-基础地质调查表明，大兴安岭地区上二叠统林西组发育有厚层的暗色泥岩，为重要的潜在生烃层系之一.林西组在陶海营子地区出露广泛.本次研究采集了该区露头和钻井中的暗色泥岩样品.通过镜质体反射率（Ro）、伊利石结晶度（KI指数法），对本区林西组暗色泥岩的有机质热演化程度进行了详细的研究，认为本地区林西组烃源岩演化处于高-过成熟演化阶段，未进入变质阶段，具有较好的页岩气勘探前景.

Abstract: 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.