Seismic Identification of Volcanic Reservoir: A Case from Junggar Basin China

Summary In recent years, volcanic has become an important new exploration field. However, due to the great heterogeneity of volcanic, the complexity of lithology & lithofacies, and the rapid spatial of phase transition, it is difficult to predict volcanic reservoir. Conventional volcanic interpretation methods usually use the volcanic reflection characteristics calibration by the well to describe the volcanic range. However, the difference in reflection characteristics of different volcanic types makes many uncertainties. Focused on the especial geological characteristics of volcanic, this study established the trinity volcanic reservoir seismic identification technology. Starting from the volcanic mechanism analysis to determine the source, than the volcanic mass analysis to divide the period, at last the volcanic facies analysis to characterize volcanic reservoir, through the source control, block control, facies control, step by step effectively reduce the multi-solution of volcanic reservoir prediction. This method has been applied to the deep carboniferous volcanic in the junger basin. Based on logging data analysis and well-seismic calibration to establish the feasibility of volcanic seismic identification in this region, the evolution analysis of volcanic eruption has been carried out, and the identification model of volcanic mechanism has been established, obtained a good the application effects.