天然堤

储层特征：马更些三角洲盆地已证实的主力储层为中&上新统水下扇沉积的辫状沟道、席状砂、水下天然堤与漫溢砂岩。

Reservoir characteristics : Upper Miocene subaqueous fan deposition in the main reservoir of the Mackenzie Delta basin has been confirmed as braided channel , sheet sand , underwater natural levee and overflow sandstone .

天然堤一旦被洪水冲积，就会产生新的叉流。

Once a natural levee alluvial flood , it will generate a new cross-flow .

细粒粘土可以沉积在天然堤外侧的隐蔽湾中。

Fine-grained clay may settle out in the sheltered bays on the outer sides of the levees .

曲流河相自下而上为河床滞留沉积-点坝-天然堤-决口扇-泛滥平原的正韵律组合。冲积河流的河相关系

E. meandering point bars , crevasse splays , natural levees and flood plains . CHANNEL GEOMETRY OF ALLUVIAL STREAMS

曲流河包括河床、边滩、天然堤、决口扇以及泛滥平原等微相，泉三段沉积微相中边滩最为发育。

The snaking stream is composed of riverbed , marginal bank , crevasse splay , flood plain and so on .

第三阶段（山西组）河道、沼泽、天然堤、决口扇环境交替出现；

In the third stage ( Shanxi Age ), swamp , distributary channel , natural levee and crevasse splay occurred alternatively .

主要沉积微相为水下分流河道、河口坝、远砂坝、席状砂、天然堤、决口扇等。

The main sedimentary microfacies comprise distributary channel , mouth bar , distal bar , blanket sand , natural levee and crevasse splay .

储集砂岩以水下分流河道为主，水下分流河道侧翼和水下天然堤次之。

The reservoir sandstone is mainly composed of subsea distributary channel , where subsea distributary channel flank and subsea natural barrier are next .

根据相标志分析，储层为曲流河相沉积，发育曲流河点坝、决口扇、天然堤及泛滥平原四种沉积微相类型。

Through the analysis of facies marker , the reservoir is meandering river facies . The facies are classified into four microfacies , i.

曲流河沉积以发育点砂坝、决口扇、天然堤和泛滥平原等微相单元为特征。

The depositional sequences of meandering river are typical of the development of point bars , crevasse-splays , natural levees and flood plains .

三角洲平原（分流河道相，天然堤、决口扇、沼泽和具决口三角洲的分流间湾）；（4）废弃三角洲平原。

) delta plain ( distributary channel , levee , crevasse splay , swamp and interdistributary bay with crevasse delta s ) and 4 ) abandoned delta plain .

本区沉积相主要为三角洲平原沉积，沉积微相主要有分流河道、天然堤、河漫沼泽。

The sedimentary facies of the study area is delta plain sedimentary , and the main sedimentary microfacies are distributary channel , natural levee and river diffuse swamp .

天然堤、决口扇、溢岸砂多为含泥粉砂、粉砂质泥和纯泥，很难成为有效储层。

The natural levee , crevasse splay and overbank sand are difficult to be effective reservoir for their content of mud-bearing silt , silty mud and unmixed mud .

三角洲平原以分流河道形成骨架砂体，在分流河道之间，发育泥炭沼泽和洼地，以及天然堤和决口扇沉积。

On delta plain , distributary channel forms framework sand bodies . Between distributary channel , peat swamp and pit , as well as natural levee and crevasse splay are developed .

文留油田文65块发育水下分流河道、水下分流河道侧翼、水下天然堤、水下分流间湾、滨浅湖泥5种微相。

Five microfacies of subsea distributary channel , its flank , subsea natural barrier , subsea interdistributary bay and coastal or neritic shale are developed in Block Wen 65 of Wenliu Oilfield .

三角洲前缘亚相包含水下分流河道、天然堤、决口扇、分流间湾泥、河口坝、前缘薄层砂等6种沉积微相。

Delta front subfacies include 6 kinds of microfacies : underwater distributary channel , natural levee , crevasse spray , bay mud between distributary channels , mouth bar and frontal thin sand layer .

在研究区内识别出来的砂体类型有水下分流河道砂体、水下天然堤砂体、水下决口扇砂体以及水下分流河道间薄层砂。

The types of sand in the study area are distributary channel sand , and underwater natural levee sand , and underwater sand crevasse fan sand , as well as distributary channel inter-thin sand .

沉积微相发育有分流河道、分流河道间、席状砂、天然堤、决口扇、远砂坝等多种类型，主要以分流河道和分流河道间为主。

Sedimentary micro-facies develops distributary channel , distributary interchannel , sheet sand , natural levee , crevasse splay , far sandbar and so on , in which the mainly types are distributary channel and distributary interchannel .

通过对测井建立的沉积相模型进行沉积相带划分，预测出河道、天然堤微相及扇三角洲前缘亚相为有利的含油气相带；

Through sedimentary factes division on model of sedimentary facies set up through well logging , it is predicted that profitable oilbearing zones are river course , microfacies of levee , and frontal sub-factes of fan-delta ;

成因相包括点坝、河道底部沉积、决口扇及决口河道、天然堤及越岸沉积、泛滥平原小型湖及沼泽等。

And the fluvial genetic unit includes point bar , the bottom of channel , bursted fan , bursted channel , natural bank , over-bank deposits , small lake of flooding plain and swamp and so on .

研究区目的层的隔层分布频率比较低，但分布范围大，为天然堤、决口扇、河漫滩以及废弃河道成因。

The barriers in the target in the study area are low in distribution frequency , but are large in distribution scale , and have originated from natural levee , crevasse splay , alluvial flat and abandoned channel .

浅水湖泊三角洲相可划分三角洲分流平原和三角洲前缘两种亚相，三角洲分流平原亚相包含水上分流河道、天然堤、决口扇、泛滥平原泥等4种微相；

Shallow lacustrine-delta facies can be divided into delta distributary plain subfacies and delta front subfacies . Delta distributary plain subfacies include 4 kinds of microfacies : overwater distributary channel , natural levee , crevasse spray , and flood plain mud ;