四川盆地二叠系火山岩裂隙式喷发模式探讨

2018年YT1井在二叠系火山角砾熔岩中获得工业气流，掀起了四川盆地火山岩勘探的热潮。受地震资料品质的影响，火山机构及喷发模式的认识尚存在不足，导致随后完钻的ZJ2井等缺失爆发相地层。为此，从火山通道刻画入手，开展重磁电震联合研究，落实火山岩沿基底断裂之间剪切带（破碎带）裂隙式喷发的特征，系统建立四川盆地内部火山机构模式，有效预测了火山机构平面展布规律。应用该方法部署的TF2井钻探取得了显著的效果，为四川盆地火山岩特殊岩性体勘探提供了新的研究思路。

Fissure erupting model of Permian volcanic rock in Sichuan Basin

Well YT1 obtained industrial gas flow from the Permian volcanic breccia lava. This set off a wave of exploring volcanic rock in Sichuan Basin in 2018. Affected by the quality of seismic data, there are still some deficiencies in understanding volcanic mechanism and eruption model, resulting in the lack of eruptive formation in wells such as ZJ2 drilled later. Starting from the characterization of volcanic channels, a joint study of gravity, magnetic and seismic data was carried out, and a volcanic mechanism model was established and the plane distribution of volcanic mechanism was effectively predicted after characterizing the characteristics of fissure-type eruption from the volcanic rock along the shear zone between the basement faults in Sichuan Basin. Used to guide well TF2, the drilling result is remarkable. The method provides a new idea for exploring special lithologic bodies of volcanic rock in Sichuan Basin.