为研究德惠断陷储层特征及主控因素,利用镜下薄片、铸体薄片、X射线衍射及扫描电镜等多种手段,对该区五套含气层系储层的储集空间特征、储层物性及影响储层物性的主要因素进行了探讨。结果表明:德惠断陷火石岭组-泉头组岩性既有粉-细砂岩、砂砾岩等的碎屑岩类,也出现火山熔岩、火山碎屑岩等的火山岩类。无论碎屑岩储层还是火山岩储层,孔、渗性均较差。该区碎屑岩为河流相、滨-浅湖相、辫状河三角洲相及扇三角洲相沉积,整体上石英含量少,长石含量偏高;其储层物性最终控制因素为各种成岩作用。而裂缝规模、裂缝成因、后期成岩改造作用等直接影响火山岩储层的储集性能。溶蚀作用为改善这两类储层物性的主要因素。 In order to study the reservoir characteristics and main controlling factors of Dehui fault depression, the reservoir space characteristics of five sets of gas reservoirs in this area were studied by means of microscopic thin films, cast thin films, X-ray diffraction and scanning electron microscope , Physical properties of reservoirs and the main factors affecting reservoir physical properties were discussed. The results show that there are both volcanic rocks such as volcanic lava and volcaniclastic rocks in the Huishitian-Quantou Formation lithology of the Dehui fault depression, both clastic rocks such as fine sandstone and conglomerate. Both clastic reservoirs and volcanic reservoirs, porosity, permeability are poor. The clastic rocks in this area are sedimentary facies of river facies, shallow lake facies, braided river facies and fan delta facies, which have low quartz content and high feldspar content. The ultimate controlling factors of reservoir physical properties are diagenesis . However, the scale of fractures, the causes of fractures and the later diagenesis reformation have a direct impact on the reservoir properties of volcanic reservoirs. Dissolution is a major factor in improving the physical properties of these two types of reservoirs.