克拉玛依油田八区克上组砾岩油藏岩石物理相研究

Petrophysical facies study of conglomerate rock reservoir in Block 8 of Kelamayi oil field

储集层岩石物理相是沉积作用、成岩作用、后期构造作用和流体改造作用的综合反映 ,同一岩性相可对应于不同的岩石物理相 ,而同一种岩石物理相则具有相似的水力学特征和相似的物性特征。根据流动层带指标、孔隙度、渗透率、泥质含量、粒度中值等参数 ,采用灰色系统理论 ,将克拉玛依油田八区克上组砂砾岩储集层定量划分为 4类岩石物理相。结合该地区的实际地质和生产状况 ,分析各类岩石物理相主要特征与剩余油分布之间的关系 ,指出 ,岩石物理相Ⅰ区水淹严重 ;Ⅳ区为低孔、低渗 ,原始含油性差 ;Ⅱ、Ⅲ区属弱水淹 ,是油田目前剩余油分布的主要区域。

The reservoir petrophysical facies is considered as the combination reflection of sedimentation, diagenesis, late construction and fluid reworking. The same rock facies can be corresponden t to different petrophysical facies. However, the hydraulic and physical propert ies are similar in one petrophysical facies unit. Based on the parameters of flo w zone indicator, porosity, permeability, shale content and mean value of the gr ain size, the Block 8 sandstone reservoir petrophysical facies was divided into 4 types in Kelamayi oil field, by means of gray system theory. Finally, through discussing in detail the main characteristics of each of them and combined with the actual of geology and production situation in the area, some analytical resu lts on the relation between the petrophysical facies and the remaining oil have been obtained, which shows that the petrophysical facies Ⅱand Ⅲ are the enrich ment distribution zones of the remaining oil in the field.