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为了提高苏里格气田苏48区块主力层的天然气开发利用效果,综合薄片鉴定、压汞、扫描电镜、图像粒度分析等方法,对该区主力层盒8上、盒8下、山1段的砂体储集性能进行研究及分类评价。研究认为:主力层段砂岩的储集空间以溶蚀孔隙为主,残余粒间孔隙次之;物性较差、孔喉小、分选不好,总体上属于低孔低渗的石英砂岩储集层,并以Ⅱ类和Ⅲ类储层为主。储集性能的好坏在很大程度上受沉积微相的制约,其中盒8下段的心滩储集性能最好,是今后最有利的开发层段,山1段次之,盒8上段最差。
In order to improve the exploitation and utilization of natural gas in the main strata of Su 48 block in Sulige Gas Field, comprehensive evaluation methods of slice identification, mercury intrusion, scanning electron microscopy and image grain size analysis were used to analyze the natural gas distribution in the main layer 8, Of sand body reservoir performance research and classification evaluation. It is concluded that the main reservoir sandstone is dominated by dissolved pores, followed by residual intergranular pores, poor physical properties, small pore throats and poor sorting, and generally belongs to low porosity and permeability quartz sandstone reservoirs , And mainly Class Ⅱ and Ⅲ reservoirs. The reservoir performance is largely affected by the sedimentary microfacies, in which the heart-beach reservoir performance of the lower section of the box 8 is the best and is the most favorable development section in the future. difference.