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致密砂岩储层成岩作用最终决定着储层的储集性能,其成岩储集相的定量评价及其与优质储层的分布关系在储层评价中显得尤为重要。基于SULG东区致密气藏盒8上段成岩储集相特征研究,阐明了Ⅰ类、Ⅱ类成岩储集相反映出致密砂岩优质储层形成的地质特点,成为筛选相对优质储层的“甜点”。通过岩心鉴定不同类别成岩储集相的测井响应特征及其参数敏感性的综合评价分析结果,建立了成岩储集相测井多参数定量分类综合评价指标体系,利用灰色理论集成及相关分析技术,实现了利用测井资料定量综合评价划分致密气藏成岩储集相及其优质储层“甜点”。通过筛选的优质储层确定出了该区盒8上段由北向南曲流河三角洲平原的含气有利区叠置连片的规模和范围,有效地反映出了该区致密气藏储层含气有利区的分布规律、延伸方向及非均质性特征,为致密气藏增储上产提供了有利目标和井区。
The diagenesis of tight sandstone reservoirs ultimately determines the reservoir performance. The quantitative evaluation of diagenetic reservoir facies and its distribution with high-quality reservoirs are of particular importance in reservoir evaluation. Based on the study of the diagenetic reservoir facies in the upper section of SULG tight gas reservoir 8, it is clarified that the type Ⅰ and Ⅱ diagenetic reservoirs reflect the geological characteristics of the formation of high-quality tight sandstone reservoirs and become the “sweet spot” “. Through the core identification of the logging response characteristics of different types of diagenetic reservoir facies and the comprehensive evaluation and analysis of the sensitivity of parameters, a comprehensive evaluation index system for quantitative classification of multiple parameters of diagenetic reservoir facies log is established. By using the gray theory integration and correlation analysis , And realized the quantitative and comprehensive evaluation of the well logging data to divide the diagenetic reservoir and its high-quality reservoir ”sweet spot ". Through the selected high-quality reservoirs, the size and scope of the superimposed contiguous contiguous gas-bearing zones in the upper part of the box 8 from the north to the south are found, which effectively reflects the gas-bearing in the tight gas reservoirs The distribution pattern, extension direction and heterogeneity of favorable zones provide favorable targets and well areas for the accumulation and production of tight gas reservoirs.