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通过曙北地区莲花油层储层沉积学研究，将研究区划分出半深湖 深湖亚相、前扇三角洲 浅湖亚相、扇三角洲前缘亚相三种沉积相类型。砂岩体由斜坡边缘向深坳部位分布特征及厚度变化表现出较强的非均质性，导致储层物性亦呈非均质变化，形成粒间孔及胶结物未充满孔、正常粒间孔、溶蚀扩大孔与粒间溶孔、混合孔组合、晶间孔组合、胶结物内溶孔６种组合类型和大孔高渗中喉、大孔中渗细喉、中孔低渗细喉和小孔特低渗微细喉４类孔喉结构模式。储层非均质特征主要受储层沉积条件和成岩改造作用的控制。
Based on the reservoir sedimentology research of Lianhua reservoir in Shubei area, the study area is divided into three types of sedimentary facies: deep lake subfacies in the semi-deep lake, shallow lake subfacies in the former fan delta, and sub-facies in the fan delta front. The sandstone bodies show strong heterogeneity in distribution and thickness variation from the edge of the slope to the deep depression, resulting in heterogeneity of reservoir physical properties, forming intergranular pores and unfilled pores of cement, normal intergranular pores , Dissolution and expansion of pores and intergranular dissolved pores, mixed pore combination, intergranular pore combination, cement type dissolved in 6 kinds of combinations and macroporous hypertonic throat, macropore medium slender, mesoporous low permeability throat and Pore-type low-permeability micro-throat type 4 pore-throat structure model. The reservoir heterogeneity is mainly controlled by reservoir sedimentary conditions and diagenesis.