关键词: 火山岩, 油气藏, 有利区带, 地球物理, 综合预测, 综合勘探

Abstract: By comprehensive study of geophysical features of three volcanic oil-gas reservoirs with different structural setting and lithologic types in Songliao, Bohai Bay and Junggar Basins, it is shown that the acidic volcanic gas reservoir in Songliao Basin exhibits negative gravity, lowminor magnetic and relatively high resistivity anomalies and disorder, low-frequency and strong seismic reflections, the basic volcanic oil-gas reservoir in Bohai Bay basin represents positive gravity and high magnetic anomalies and disorder, low-frequency and discontinuous seismic reflections, and the medium-acidic volcanic oil reservoir in Junggar Basin has transitional gravity and magnetic anomalies, high resistivity anomalies and disorder, low-frequency and weak seismic reflections.According to the viewpoint that the vicinities ofmagnetic gradient belts close to or connected to source rocks are themost promising areas for oil-gas exploration, the favorable exploration zones in Changshen-1 well block, Zaobei and Shixi-Ludong areas in Songliao, Bohai Bay and Junggar Basins respectively are predicted comprehensively. An integrated exploration scheme for volcanic oil-gas reservoirs and relevant countermeasures are summarized

Key words: volcanic rock, oil-gas reservoir, favorable exploration zones, geophysical features, comprehensive prediction, integrated exploration