Natural Gas Accumulation and exploration potential of permian Volcanic Rocks in Southwest Sichuan Basin

To figure out gas enrichment laws in Permian volcanic rocks, Sichuan Basin, an association among reservoir-forming elements was explored to analyze forming modes and point exploration prospects accordance with reservoir characteristics, source conditions, fault elongation Zhougongshan Jianyang areas. Results show that there mostly exist porous volcaniclastic rock lava reservoirs of explosive facies. In Lower Cambrian Qiongzhusi Formation as the principal rock, early faults offered pathways assemble ample initial oil gas. Following increase burial depth, started cracking vastly create oil-cracked These constitute one mode hydrocarbon supply–fault transporting–in-situ Jianyang. While Maokou 1 Member main source, active during generation expulsion acted on trap preservation. Late kerogen-cracked gathered at structural highs far from giant faults. Thus, other exhibited is adjustment–effective accumulation. Reservoir-forming conditions rocks present certain disparity all kinds tectonic settings inside basin, giving rise various developed. The are expected be a major domain for reserve production Basin.