Delt-frong acclivity and shallow lake are a major type of sedimentary sub-facies of the Suining formation of Upper Jurassic, and the provenance is uplifted area of Longmenshan.

• 摘要洛带气田遂宁组主要为三角洲前缘斜坡亚相和浅湖亚相沉积，其物源区为龙门山隆起区。