【摘要】 二连盆地赛汉塔拉凹陷侏罗系阿尔善组三段火山岩以喷溢相为主,厚度较薄,钻穿井较少。通过单井资料分析认为,该区阿尔善组存在4期火山喷发活动。针对火山岩体非均质性较强的特征,探索性地将地震分频成像技术引用到火山岩旋回识别中,通过改善地震资料分辨率,有效地预测出各期喷发旋回的规模及厚度,较好地指导了火山岩油气勘探。更多还原

【Abstract】 Volcanic rocks dominated by eruptive facies are developed in the third member of Aershan formation of Jurassic in Saihantala sag in Erlian basin,with thin thickness and few wells penetrating into the rocks. It is suggested from well data analysis that there exited four stages of volcanic eruptions in Aershan period. In view of the strong heterogeneity of such volcanic rock bodies,this paper presents the exploratory application of frequency-divided imaging technique to the identification of volcanic eruption cycles. By improving resolution of the seismic data,the scale and thickness of each eruption cycle are effectively predicted,providing a powerful support for petroleum exploration of volcanic reservoirs in this area.更多还原