辽河大民屯中部地区主要储集岩是太古界的区域变质岩和混合岩类，尤以裂缝发育和经过碎裂化的刚性变质岩类的储集性能最佳。
The mainly reservoirs in the middle of Damintun depression of Liaohe basin are the regional metamorphic rocks and the migmatites , which are more fractured and rigid by the cataclastics .
混合岩类