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首页> 外文会议>Indonesian Petroleum Association Twenty-Eighth Annual Convention Vol.1, Feb 26-28, 2002, Jakarta >DEPOSITIONAL ARCHITECTURES OF RECENT DEEP WATER DEPOSITS IN THE KUTEI BASIN, EAST KALIMANTAN
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DEPOSITIONAL ARCHITECTURES OF RECENT DEEP WATER DEPOSITS IN THE KUTEI BASIN, EAST KALIMANTAN

机译：加里曼丹东部古帝盆地最近深水沉积的沉积结构

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摘要

To aid exploration and appraisal of hydrocarbon discoveries in deepwater deposits of the Kutei Basin, a study of analogous sedimentary architectures in Recent deposits of the same basin has been undertaken. The aim was to develop an understanding of the external and internal geometry of slope to basin floor elements in a structured setting using high quality 3D seismic data. Geological models generated have been used to help constrain geometries, aspect ratios and net to gross variations of deposits in the prospective section. Images of the seabed and excellent imaging of near surface deposits using 3D seismic data show canyons deflected by toe-thrust anticlines and related mud diapirs. Over slope-steps, gravity flows are laterally confined and the resultant facies belts are narrow. In slope mini-basins, flows are less confined resulting in deposition over a broad area. The Recent deposits of a single canyon and associated basin floor system illustrate the deepwater depositional elements of the Kutei Basin. On the slope, debrites at the base are followed by a slope channel complex then a channel-levee complex. The succession on the basin floor is similar; debrites, basin floor fan and a channel-levee complex. Slope channel complexes and basin floor fans appear to be sand prone. These sand prone deposits increase in width:thickness and areal extent from slope-step to slope mini-basin and from the slope to basin floor. Apparent lateral connectivity increases and vertical connectivity decreases from the slope to basin floor. The formation of channel-levee complexes shifts sand prone depocentres. Leveed-channel deposits are poorly developed on the middle slope and well developed on the lower slope and basin floor, where they appear sand prone and are likely to have good connectivity. Basin floor fans that form at the point of downdip levee termination are shifted basinward.
机译：为了帮助对库蒂盆地深水沉积物的油气发现进行勘探和评估，已经对同一盆地最近沉积物中的类似沉积构造进行了研究。目的是利用高质量的3D地震数据，在结构化的环境中加深对盆底盆地单元的内部和外部几何形状的了解。已使用生成的地质模型来帮助约束几何形状，纵横比以及预期断面中矿床的净变化与总变化。海底图像和使用3D地震数据对近地表沉积物的出色成像显示，峡谷被脚趾冲断背斜和相关的泥底盘偏转。在斜坡阶跃上，重力流被横向限制，形成的相带狭窄。在斜坡小盆地中，流动受到的限制较小，从而导致在大面积上的沉积。单个峡谷和相关盆地底部系统的最新沉积表明了库提盆地的深水沉积元素。在斜坡上，底部的碎屑之后是斜坡通道复合体，然后是通道-堤坝复合体。盆底的继承是相似的。碎屑，盆地落地扇和河道堤坝群。斜坡河道综合体和盆地底扇似乎容易出沙。这些易砂沉积物的宽度：厚度和面积范围从斜坡阶跃到斜坡小盆地以及从斜坡到盆底。从斜坡到盆地底部，明显的横向连通性增加而垂直连通性减小。河道-堤坝复合体的形成改变了易砂沉积中心。沿河通道沉积物在中坡发育不佳，在下坡和盆地底部发育良好，在那里它们容易出砂，并且可能具有良好的连通性。在下倾大堤终止点处形成的盆地底板扇向盆地移动。

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