Triassic Yanchang Formation的意思|示意

The chang 61 low permeable reservoir in Yanchang Formation in the Upper Triassic is the main oil layer in Wuqi area.

吴旗地区主力油层为上三叠统延长组长61，属于特低渗储层。

Yanchang formation of the Upper Triassic in the Ordos basin have a wide distribution of alluvial fan, fluvial, lacustrine, fan delta, braided delta and meander delta deposits.

鄂尔多斯盆地上三叠统延长组广泛发育冲积扇、河流、湖泊、扇三角洲、辫状河三角洲和曲流河三角洲沉积。

The main oil-bearing formation is Chang4+5 reservoir of Yanchang Formation, Triassic.

其主力油层为三叠系延长组长4+5油层。

Rare earth elements (REE) and trace elements were used to analyse source rock and source direction of Yanchang Formation of the Upper Triassic in Ordos Basin.

利用稀土元素和微量元素，分析鄂尔多斯盆地中部上三叠统延长组母岩类型和物源方向。

Dark mudstones and the turbidites of deep lake facies were discovered recently in the Member 1 of Yanchang Formation, Upper Triassic in Ordos Basin.

鄂尔多斯盆地三叠系延长组长1段发育一套深湖相浊积岩及数层暗色泥岩。

Formation factors and mechanism of the laumontite in upper Triassic Yanchang group of Jingan oilfield are analyzed.

分析了靖安油田上三叠系延长统浊沸石的形成条件及形成机理。