natural levee meaning in English
天然堤；自然堤
天然堤岸
自然堤防
Examples
- The depositional sequences of meandering river are typical of the development of point bars , crevasse - splays , natural levees and flood plains
曲流河沈积以发育点砂? 、决口扇、天然堤和泛滥平原等微相单元?特徵。 - The main sedimentary microfacies are submerged distributary channel , debouch bar , submerged natural levee and flood - plain splay . the research shows that the physical property of subermerged distributary channel sandbodies are the best and debouch bar comes second
长4 + 52长62油层砂体的沉积微相类型主要有水下分流河道、河口坝、水下天然堤和水下决口扇等，其中水下分流河道砂体的物性相对最好，其次为河口坝砂体。 - 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。 - 2 , by detailed studying of sedimentary microfacies , guan 3 - 6 beds mainly belong to high crooked fluvial deposition system , and some parts of guan 5 - 6 show plait fluvial deposition system features : detailed divided them into edge beach , center beach and natural levee etc . 9 deposition microfacies and beach ridge and groove microficies
2 、通过沉积微相多层次逐级细分研究，认为馆3 - 6砂层组主要属于高弯曲度曲流河沉积体系，馆5 6部分小层表现为辫状河沉积体系；并细分出了边滩、心滩以及天然堤等九种沉积微相，以及滩脊和凹槽等微微相。 - There are 7 sedimentary microfacies that can be recognized , including underwater distributive river course , estuarine bar , submerged natural levee , etc . 2 ) on the basis of high - resolution sequence stratigraphy , distinguished basic level and base - level cycle , chang - 6 formation can be divided into 6 strata and 15 substrata , consequently the isochronous formation structure is set up
自下而上依据高分辨率地层学原理，根据识别出的基准旋回界面以及3种在研究区常见的短期基准旋回层序基本类型，将长6油层组划分出6个砂层， 15个小层，建立以小层为单元的长6储层的等时地层格架。