松辽盆地宋芳屯油田扶杨油层孔隙结构及其影响因素

Fu-yang reservoirs pore structure and influence of Songfangtun Oil Field in Songliao basion

通过镜下观察,宋芳屯油田扶杨油层孔隙类型较多,以粒间孔为主。细管压力曲线上看,曲线较陡,分选差,孔隙结构特征参数总体上较差,与孔隙度、渗透率有一定的关系,大的孔隙对渗透率的贡献最大。扶杨油层的孔隙结构较复杂主要由于成岩作用影响,压实作用使孔隙空间显著缩小,胶结作用和自生粘土矿物生长使孔隙进一步缩小和复杂化,后期的溶蚀作用使孔隙空间增加。

The fu - yang reservoirs pore styles are variety, the main style is intergranular pore. The Cp curves＇shape are cliffy ,the pore structure is assorted and pore structure characteristic parameters mainly are poor. It has some relationship with pority and permeability. The big pore have the most contribution to the permeability. Fu - yang reservoirs＇pore structure are complex because of the influence of diagenesis, compaction decreasing the pore space obviously. Both cementation and clay mineral growing further decreased the pore space and made pore structure more complication and later stage denudation increased the pore space as well.