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- Keywords microfacies combination of main sandbody;submerged distributary channel;braided delta front;Xifengoil field;Shan-Gan-Ning basin; 储油砂体微相组合;水下分流河道;辫状河三角洲前缘;西峰油田;陕甘宁盆地;
- braided delta front 辫状河三角洲前缘
- The braided nyc delta front subfacies located on the south slop area is developed in the braided rive delta which progrades from south to north. 利用沉积体制方法研究丁沾化凹陷孤南洼陷沙三段中亚段中部沉积体系平面分布规律。
- Eustatic lake level and source change had resulted in intercalation development in braided delta system. 湖面的升降和物源的摆动使辫状三角洲沉积体系中发育夹层。
- Because of Yizheng orogeny in Late Cretaceous, braided delta system of Anfeng was formed by rifling in Subei Basin and rising of sedimentary base level. 摘要受晚白垩世仪征运动的影响,苏北盆地拉张断陷,沉积基准面上升,从而形成了比较完整的安丰退积型辫状三角洲沉积体系。
- Because of Yizheng orogeny in Late Cretaceous,braided delta system of Anfeng was formed by rifting in Subei Basin and rising of sedimentary base level. 受晚白垩世仪征运动的影响,苏北盆地拉张断陷,沉积基准面上升,从而形成了比较完整的安丰退积型辫状三角洲沉积体系。
- Characteristics of braided delta microfacies and depositional systems in Biyang depression are analyzed through comprehensive analysis of drill cores and logging data. 依据岩心和测井资料,对泌阳凹陷新庄辫状三角洲沉积体系进行了沉积微相划分和微相特征分析。
- They are widely developed in delta front, and they usually overlap vertically and occur in belts regionally. 它们在三角洲前方广泛发育,垂向上相互叠置、平面上成带出现。
- Seismicity can damage the stability of delta front and form liquefied fluxoturbidite and faulted fluxoturbidite. 其中地震作用可以破坏三角洲前缘的稳定性,形成液化滑塌浊积体和断阶滑塌浊积体。
- Mainly consisting of sandstones and pebbled sandstones with minor siltstone and mudstone partings, the lower Lower Jurassic Abe Formation in Kuche depression is subaqueous distributary channel deposit of braided delta. 塔里木盆地库车拗陷下侏罗统阿合组主要由砂岩和含砾砂岩组成,夹少量粉砂岩及泥岩。
- 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。
- Braided delta system and sublacustrine fan system constitute the primary Eogene coarse elastic sediments which are characterized mainly by short axial direction transportation depositlon. 辫状河三角洲体系和湖底扇体系,构成了伊舒地堑下第三系最主要的粗粒碎屑沉积体系。
- Underwater distributary channel of the delta front and turbidite fan are the profitable facies of Dongpu depression. 有利相带主要为三角洲前缘水下分流河道和浊积扇。
- During the abandonment period of delta, sediments of delta front were usually rebuilt by tidal action. 在三角洲废弃期,三角洲前缘沉积物常被潮汐作用改造。
- In contrast , the regular and good reserved delta front is disadvantaged to form fluxoturbidite. 相反,形态规则、保存完好的三角洲前缘反而不利于滑塌浊积岩的形成。
- The main depositional systems identified in No 1 member of Xujiahe formation, which developed in early late-Triassic gulf of NW Sichuan basin, include carbonate platform, bartier island-lagoon, and braid delta, etc. 川西北地区上三叠统须一段形成于海湾盆地背景下,主要由碳酸盐岩台地、障壁岛-泻湖及辫状三角洲等沉积体系组成。
- The sedimentary facies is the underwater distributary channel of delta front with good accumulation ability. 针对该地区探井少、地震资料品质较差等特点,开展了储层综合预测技术应用研究。
- The braid delta and sublacustrine fan deposits influenced by canyon were recognized inside the sag from the point of genesis based on the research results of the development pattern of brink canyons. 在此基础上,进一步研究了湖缘峡谷沉积体系对洼陷内部储集砂体的贡献以及对油气成藏的影响。
- 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 overbank and fluvial channel sub-facies in the fluvial facies were developed.Only delta front sub-facies was developed in the delta facies. 其中,河流相中发育堤泛亚相和河道亚相,在三角洲相中仅发育三角洲前缘亚相,湖泊相中以浅湖亚相为特征。