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从描述储集层基本特征、分析储集层性质的主控因素、建立储集层成因模式和评价、预测储集层性质这 4个层次 ,研究准噶尔盆地重点勘探目标区的侏罗系储集层。系统总结侏罗系储集层岩石学特征 ,认为成岩压实作用强弱是控制储集层性质的关键因素 ;指出相对优质储集层均为剩余原生粒间孔隙型储集层 ,溶蚀作用对渗透率贡献小 ;非煤系储集层的孔隙保存条件明显比煤系储集层好 ,这是三工河组、头屯河组和吐谷鲁群的物性普遍优于八道湾组和西山窑组的原因。在确定储集层性质的控制因素和控制机理基础上 ,建立了煤系和非煤系两大类储集层的成因 演化模型。在上述研究的基础上 ,分地区、分层位评价了储集层 ,并预测了不同渗透率储集层的深度界线及相对优质储集层的平面分布。图 6参 10
This paper studies the Jurassic reservoirs of the key exploration target areas in the Junggar Basin from the four levels of describing the basic characteristics of the reservoir, analyzing the main controlling factors of the reservoir properties, establishing the genesis mode and evaluation of the reservoir, and predicting the nature of the reservoir. Floor. We systematically summarize the petrologic characteristics of the Jurassic reservoirs, and consider that the diagenetic compaction is the key factor to control the reservoir properties. It is pointed out that the relatively high-quality reservoirs are all residual primary intergranular pore-type reservoirs. The contribution of permeability is small; the pore preservation conditions of non-coal-bearing reservoirs are obviously better than that of coal-bearing reservoirs, which are generally better than those of the Badaowan and Xishanyao formations in the Sangonghe Formation, Toutunhe Formation and Tuugulun Group s reason. Based on the controlling factors and controlling mechanism of reservoir properties, the evolution evolution models of two types of reservoirs, coal and non-coal series, are established. Based on the above studies, the reservoirs are evaluated by region and stratigraphic position, and the depth boundaries of reservoirs with different permeability and the plane distribution of relatively high-quality reservoirs are predicted. Figure 6 Senate 10