华北地区石炭系、二叠系碎屑岩储集层特征

CHARACTERISTICS OF CLASTIC RESERVOIR ROCK IN CARBONIFEROUS AND PERMIAN, NORTHERN CHINA.

依据区域地质资料及冀中苏桥、文安地区井下岩心分析化验数据，论述研究区石炭系、二叠系碎屑岩的岩石类型、储渗性能及孔隙结构等储集层特征，并分析了影响储渗性能的因素。认为区内石炭系、二叠系砂岩储集层虽然物性差，但对储气来说仍不失为较好的储集层。当局部地区存在沉积间断面的风化溶蚀或构造缝发育等特定条件时，其储集条件有变好的可能。

Based on regional geologic information and core analysis data in Suqiao, Wenan area in center Hebei province, this paper discussed the rock types, percolation features and pore structures of clastic rocks in Carboniferous and Permian, and analyzed factors affected the percolation features. It is considered that sandstone reservoir in Carboniferous and Permian are poor in petrophysical property, but are still better reservoirs for accumulating hydrocarbons. The petrophysical property of reservoir may become better if there is weathering denudation in sedimentary discontinuity and developed structural fractures in some area.