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新场下沙溪庙组气藏是川西致密碎屑岩远源气藏中新近发现的又一含气层段。文中通过对该气藏基本地质特征及含气砂体地球物理特征的研究 ,总结出该气藏天然气富集的控制因素主要为储层沉积微相 ,含气砂体表现为“中 -强振幅和低阻抗”的负反射地震响应特征。在对气藏特征认识的基础上 ,作者结合有利储层微相展布及地震响应等特征对气藏进行了预测评价。
The Shaximiao Formation gas reservoir in the new site is another newly discovered gas-bearing interval in the far-source gas reservoirs of the tight clastic rocks in western Sichuan. Based on the study of the basic geologic characteristics of the gas reservoir and the geophysical characteristics of gas-bearing sand bodies, the paper concludes that the controlling factors of natural gas enrichment in this gas reservoir are mainly reservoir sedimentary microfacies. The gas-bearing sand bodies show “medium- And low impedance ”negative reflection seismic response characteristics. Based on the understanding of the characteristics of gas reservoirs, the author made a prediction and evaluation of gas reservoirs based on the characteristics of favorable reservoir microfacies distribution and seismic response.