大庆石油学院学报2011，Vol.35Issue(4)：30-37,8.
苏德尔特地区南一段凝灰质砂岩储层微观非均质性及其主控因素
摘要
Abstract
Tuffaceous sandstone belongs to abnormal pattern reservoir that has low porosity and permeability, and has large distribution area in many sedimentary basins. This paper aims at describing the reservoir microcosmic heterogeneity characteristics and analyzing its major control factors, which is very important to this type reservoir's predication and development. Based on the comprehensive research of the cores, thin slices, SEM, mercury-injection data, and predecessors' research outcome of Suderte area in Hailar basin, we come to the conclusion that, compared with normal sandstone, tuffaceous sandstone has more pore types and more complicated pore texture because of pyroclastics composition mixing, and has severely micro -cosmic heterogeneity correspondingly. Sedimentary mircofacies types and tuffaceous origin of sandstone are the fundamental factors effected reservoir micro-cosmic heterogeneity because they decided the lithologic composition, diagenesis type and degree. With different relative content among crystal, shard and lithic in pyroclastic grain, or different relative content between pyroclastic grain and ash matrix, sandstone has different pore texture and physical property characteristics. Diagenesis plays a key part in aggravating reservoir heterogeneity. Compaction and cementation caused sandstone "low porosity and permeability" property. But tuff composition and content difference in sandstone increased diagenesis disparity in 3D dimension space, aggravating reservoir microcosmic heterogeneity correspondingly.关键词
凝灰质砂岩/海拉尔盆地/孔隙结构/微观非均质性/沉积微相/砂岩成分/成岩作用Key words
tuffaceous sandstone/ Hailar basin/ pore texture/ microcosmic heterogeneity/ sedimentary microfacies/ sandstone composition/ diagenesis分类
石油、天然气工程引用本文复制引用
王宏语,张晓龙,段志勇,魏冬..苏德尔特地区南一段凝灰质砂岩储层微观非均质性及其主控因素[J].大庆石油学院学报,2011,35(4):30-37,8.基金项目
教育部油气地质创新团队项目(IRT0864) （IRT0864）
