塔里木盆地玉北地区鹰山组成岩作用及对储层的影响

Lithology of Yingshan and Its Influence on Reservoir in Yubei Area of Tarim Basin

通过岩心观察、薄片鉴定、物性测试、扫描电镜、阴极发光等手段,以及定性描述与定量表征相结合的方法,对塔里木盆地玉北地区鹰山组成岩作用特征及其对储层的影响进行分析。结果表明:溶蚀作用能大幅改善孔渗性能,胶结作用不同程度地减低孔隙度和渗透率,由热液活动伴生的溶蚀、交代作用能改善储层的储集性能,埋藏白云化能够促进优质储层形成,压溶压实作用对孔隙的影响具有两面性,玉北地区鹰山组储层主要受溶蚀、热液白云化控制。

By means of core observation, thin section identification, physical property test, scanning electron microscope and cathode luminescence, as well as the method combining qualitative description and quantitative characterization, the characteristics of lithology of Yingshan in Yubei area of Tarim Ba-sin and its influence on the reservoir were analyzed. The results show that the dissolution can greatly improve the porosity and permeability, the cementation can reduce the porosity and per-meability to different degrees, the hydrothermal effect can improve the dissolution and metasoma-tism of rock strata, the burial dolomization can promote the formation of high-quality reservoirs, and the effect of compaction on pores has two sides. The reservoir of Yingshan formation in Yubei area is mainly controlled by dissolution and hydrothermal dolomitization.