| 1. | According to observing the core and well logging facies analysis , yanchang 4 + 5 sector to yangchang 3 mainly developed underwater distributary channel , river mouth bars , underwater natural levee , underwater crevasse splay , interdistributary bay , far bars , etc . and some shallow lake subfacies
根据岩芯观察以及测井相分析，认为长4 + 5 ?长3期以水下分流河道、河口砂坝、水下天然堤、水下决口扇、分流间湾和远砂坝等沉积微相以及部分浅湖亚相沉积为主。 |
