通过对近年完成的6条大剖面重新解释研究,发现在松辽盆地晚侏罗世—早白垩世断陷之下的深层还存在一早、中侏罗世至晚三叠世的古前陆型盆地。这一发现对深层天然气勘探具有重大现实意义。首先,在理论上理清了松辽盆地深层不只是简单断陷盆地的问题,而是断陷、前陆、类克拉通等多期盆地叠合的问题。以前只知道松辽深层天然气来自深层断陷盆地,对天然气的物质来源、成藏机理等认识考虑不全面。新的发现对深 Through the reinterpretation of six large sections completed in recent years, it is found that the paleo-foreland-type reservoir formed in the early Jurassic-Late Triassic in the deep layer beneath the Late Jurassic-Early Cretaceous fault in the Songliao Basin basin. This finding is of great practical significance for deep gas exploration. First of all, it is theoretically clarified that the deep layer of the Songliao Basin is not only a simple faulted basin, but a problem of superimposition of multi-period basins such as faulted depression, foreland and craton. Previously only knew that Songliao deep natural gas came from deep faulted basins and did not fully understand the source of natural gas and the mechanism of hydrocarbon accumulation. New discovery to deep