稠油油藏疏松岩石孔隙度校正方法

辽河油抠稠油油藏岩石胶结程度低，因此实验室常规分析获取物物性参数不代表地层条件下岩石的物性特征。应用冷冻钻样，包封分析等技术对稠油油藏疏松岩石孔隙度校正方法进行研究。疏松岩石孔隙度校正量主要与岩石碎屑颗粒的粗细和分选性有关。

STUDY ON COMPRESSIBILITY OF PORE VOLUME OF LOOSE ROCK IN HEAVY OIL RESERVOIR

Because of the low consolidation strength of the rocks in heavy oil reservoirs Liaohe oil field, the physical parameters of the rocks obtained by conventional laboratory analysis can't represent the physical characteristics of subsurface reservoir rocks.For this reason, the technique of freezing sample drilling and sealing analysis was adopted to study the compressibility of pore volume of heavy oil reservoir rock. The compressibility of pore volume in loose rock is mainly related to the grain size and sorting index of clastic particles: the compressibility increases with the grain diameter, and the better the clastic particle sorted, the higher compressibility of pore volume is. The pore volume of surface loose rock is 10%-23% bigger than that of subsurface rock, and the porosity is 2%-5% higher. Some calibration equations of porosity between surface and subsurface rocks were established for different lithology in this paper.