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经过深入研究台北凹陷中侏罗统广泛发育的辫状河三角洲沉积体系，认为其主要沉积特征是：①辫状河三角洲缺失曲流河等陆上环境，是一个相带发育不完整的沉积体系；②沉积物粒度相对较粗，结构及矿物成熟度较低，矿物成分与物源成分一致；③辫状河三角洲前缘水下分流河道沉积发育，常反复叠置构成巨厚层；④辫状河三角洲前缘通常形成在距高地不远的湖盆边缘。中侏罗世时，辫状河道沿倾向逐渐向湖盆进积和横向迁移，从而形成规模较大的席状砂体，储集性能较好，沉积范围可达数百平方千米。当前缘砂体伸入到生油凹陷之后，在构造的配合下，可形成良好的油气聚集带
After intensive study of the braided river delta sedimentary system widely developed in the Middle Jurassic of the Taipei depression, the main sedimentary characteristics are considered as follows: ① The braided river delta lacks a meandering river and other onshore environment and is a sedimentary system with incompletely developed facies ; ② relatively coarse sediment size, structure and mineral maturity is low, the mineral composition and provenance composition; ③ braided river delta front underwater distributary channel development, often repeatedly stacked to form a huge layer; ④ braid The delta front is usually formed on the edge of a lake not far from the heights. During the Middle Jurassic, the braided channels gradually migrated into the lake basin along the dip direction and migrated laterally to form large-scale sand bodies with better reservoir performance and deposition area of hundreds of square kilometers. After the frontal sand body extends into the oil generating depression, under the cooperation of structure, a good hydrocarbon accumulation belt can be formed