地震储层学在准噶尔盆地火山岩油气勘探中的应用——以乌夏地区为例

Application of seismic reservoir to volcanic reservoir exploration in Wuxia area of Junggar Basin

应用地震储层学的理论、方法和技术对准噶尔盆地西北缘乌夏地区二叠系火山岩进行了研究。首先,明确了此类火山岩(熔结角砾凝灰岩)是裂隙式火山喷发的产物,其分布主要受早期火山口和火山喷发前古地貌的控制,储集空间以气孔为主;其次,采用本征值相干分析和古地貌恢复技术明确了火山口及喷发前古地貌特征;最后,综合利用测井、物探技术,对火山岩的有利岩性进行预测,形成了裂隙式喷发火山岩储层综合预测技术,并取得了较好的应用效果。

Based on the theory and technology of seismic reservoir,the Permian volcanic reservoir in Wuxia area in northwestern margin of Junggar Basin is researched.The resultshows thatthe volcanic rock（lava tuff breccia） is resulted fromthe fissure volcanic eruption,the distribution is mainly controlled by the early craterand the paleogeomorphology before volcanic eruption,and the reservoir space is mainly air hole.By using the technology of the coherence analysis andthe paleogeomorphology recovery,the characteristics of the crater and paleogeomorphology before volcanic eruption are identified.The technology of logging and geophysics are applied to predict the favorable lithologies,the forecasting technique for fissure volcanic reservoiris formed and good results have been achieved.