CAJ | 학술논문

作为四川盆地最重要的气源岩之一,二叠系烃源岩逐渐被越来越多的研究者所重视.通过对四川盆地晚二叠世龙潭期岩相古地理的恢复,以及沉积环境对烃源岩发育的控制作用分析,指出四川盆地上二叠统优质烃源岩主要发育于浅海陆棚、潮坪-潟湖及滨岸沼泽等相带.文中引入了“有机碳厚度”的概念,即采用有机碳含量与烃源岩厚度之积综合反映烃源岩的发育特征;并结合无机地化与有机碳分析测试数据,论述了沉积环境的源控意义,为烃源岩宏观分布预测与资源量估算提供了理论参考.
작위사천분지최중요적기원암지일,이첩계경원암축점피월래월다적연구자소중시.통과대사천분지만이첩세룡담기암상고지리적회복,이급침적배경대경원암발육적공제작용분석,지출사천분지상이첩통우질경원암주요발육우천해륙붕、조평-석호급빈안소택등상대.문중인입료“유궤탄후도”적개념,즉채용유궤탄함량여경원암후도지적종합반영경원암적발육특정;병결합무궤지화여유궤탄분석측시수거,논술료침적배경적원공의의,위경원암굉관분포예측여자원량고산제공료이론삼고.
As the most important source rock for gas generation in the Sichuan Basin, Permian source rocks have attracted more and more attentions. The lithofacies palaeogeography during the Longtan phase of the Late Permian in the Sichuan Basin was reconstructed, and the controlling effects of sedimentary environment on source rock generation were analyzed. In the Upper Permian of the Sichuan Basin, favorable source rocks mainly developed in the shallow shelf, tidal flat-lagoon and onshore swamp facies. The concept of “organic carbon thickness” was introduced in this article. Organic carbon content was multiplied by source rock thickness so as to illustrate the generation features of source rocks. Combined with inorganic geochemical characteristics and organic carbon ana-lyses, the controlling effects of sedimentary environment on source rock generation were studied, providing theo-retical reference for the macroscopic distribution prediction of source rocks and resource estimation.