须家河组（Xujiahe Fm）曾称广元煤系、须家河系，是岩石地层名称，时代属晚三叠世中、晚期。分布于川西北一带。为海陆交互相含煤沉积，以灰色石英砂岩、长石石英砂岩、厚层砂岩、薄层砂岩及粉砂岩为主，夹泥岩、煤层、及透镜状菱铁矿层，共厚约600米。
结果表明，研究区须家河组的天然气主要来源于下伏地层。
The results indicate that the natural gas of the Xujiahe Formation mainly derived form the lower strata.
川西地区南部须家河组储层，属于非常规特低孔低渗致密砂岩。
Xujiahe Formation in the south of west Sichuan is composed of tight sandstones with unconventional extra-low porosity and permeability.
须家河组和下沙溪庙组的砂岩储层是官南构造陆相碎屑岩中的主要产气层。
Sand reservoirs of Xujiahe Formation and lower Shaximiao Formation is the major gas production layers in continental elastics in Guannan Structure.
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