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- The reservoir type is delta plain facies distributary channel sandbody,and the lithology is mainly composed of fine arcose with a compact cementation. 储层为三角洲平原分流河道砂体,岩性主要为细粒长石砂岩,胶结致密。
- The sand bodies located in distributary channel of lake facies delta plain and river mouth of delta front are favorable reservoir beds. 湖相三角洲平原分流河道和三角洲前缘河口坝砂体为有利储层。
- Delta plain and front subfacies belong to river-lake transitional facies,there are lots of similar and different facies marker between the two subfacies. 湖成三角洲平原和前缘同属河湖过渡相,其对应沉积相标志存在很多相同和不同之处。
- Keywords Ordos basin;river facies;braided river;depositional model;deltaic plain facies;sand body; 鄂尔多斯盆地;河流相;网状河;沉积模式;三角洲平原相;砂岩体;
- The treatment of ANN lithofacies shows that typical delta facies include distal bar,mouth bar,subaqueous distributary channel,interdistributary estuary in delta front,delta plain branch channel and inter branch channel in ascending order. ANN(神经网络 )岩相处理结果表明 ,典型的三角洲沉积岩相序列自下而上依次为三角洲前缘远砂坝、河口砂坝、水下分流河道、分流间湾、三角洲平原分支河道及分支河道间沉积 ,将其结果与录井岩性序列对比 ,符合率非常高。
- Among them, the under water distributary channel in the frontal edge of the delta possesses the best physical property and then the delta plain, stream, dam sandbody and fluvial facies belt. 其中三角洲前缘水下分流河道及河口坝砂体储集物性最好,其次为三角洲平原、滨浅湖滩坝砂体及河流相带。
- Meandering-delta facies can be divided into delta plain subfacies and delta front subfacies,and lacustrine facies can be divided into shore lacustrine subfacies and shallow lacustrine subfacies. 头台地区泉四段属曲流河三角洲和湖泊沉积体系,曲流河三角洲相分为三角洲平原和三角洲前缘2种亚相,湖泊相分为滨湖和浅湖2种亚相。
- Distributary plain facies sands body: 1).Meandering sands micro-facies, which represents large low sinuosity meandering disposition, and the channel sands is very large. 2). 一是分流平原相砂体:1、曲流河砂体微相,代表大型低弯度的曲流河沉积,河道砂体规模很大;
- Lakeshore and fan delta plain of the thirdstage are the main enviroments of coal accumulating. 湖泊缓慢淤浅阶段的湖滨和扇三角洲平原是聚煤的主要环境。
- Lacustrine source rocks provided resource for the oil and gas generation, and flood plain facies and paludal facies mudstone supplied cap rock for the reservoir accumulation. 泛滥平原相、沼泽相泥岩为油气成藏提供了良好的盖层条件;
- It has a two-layer structure, i. e. braid-river delta plain subfacies and braid-river delta front subfacies. 它明显分为两层,即辫状河三角洲平原亚相和辫状河三角洲前缘亚相。
- The research area is mainly located in a delta plain environment including distributary braided channels, natural levees, flood basins, flatland morasses and distributary beaches. 在相分析的基础上,进一步研究了区内沉积微相的平面展布特征及其演化规律,认为区内山1期为近海湖泊辫状河三角洲,到山2期以后演化为内陆湖泊三角洲。
- The reservoirs in the study area are mainly delta plain distributary channel sand body and delta front underwater distributary channel sand body. 研究区储层主要为三角洲平原分流河道及三角洲前缘水下分流河道砂体;
- The reservoirs at Baobei block, the Baolang oil field in the Yanqi Basin are composed of braided distributary channel sandbodies in lower delta plain. 焉耆盆地宝浪油田宝北区块储层为下三角洲平原辫状分流河道砂体。
- The lower clastic member under coal C_3 is interperted as deposits of anastomosed river system on the upper delta plain. 研究表明:C_3煤层形成对的下伏碎屑岩段为一发育在上三角洲平原上的网状河流体系。
- In Bengal delta plain subsurface aquifers,these microbial reactions may mobilize arsenic from the solid phase into the aqueous phase,resulting in contaminated underground water. 在孟加拉三角洲的地下含水层中,微生物参与了将砷从固相迁移到水相的关键步骤,最终导致了地下水中的砷污染。
- The river discharged into the western part of the deltaic plain. 河水排注到三角洲平原的西部。
- Fuyang reservoir in on hem Songliao basin is a delta plain with well-developed channels of which the banded channel-sand is of strong heterogeneity and anisotropy. 摘要松辽盆地北部扶杨油层属三角洲平原沉积,河道广泛发育,条带状发育的河道砂体具有很强的非均质性和各向异性。
- These ongoing depositional changes related to differential subsidence have potentially serious ramifications for this low-lying, densely populated delta plain area. 由于大量全新世沉积堆积在崇明岛前缘的沉降中心,重力压实作用导致该中心前部出现“泥火山”,周围地层变形明显。
- The depositional areas of lagoonal delta plain peat swamp, terrigenous supratidal peat flat and terrigenous supratidal peat swamp were the best place of the coal-accumulating process. 潟湖三角洲平原和陆源碎屑潮上泥炭坪及泥炭沼泽是最佳的聚煤场所。