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Linked lowstand delta to basin-floor fan deposition, offshore Indonesia: An analog for deep-water reservoir systems

机译:将低水位三角洲与印度尼西亚海上的盆地底扇沉积物联系起来:用于深水储层系统的模拟物

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摘要

In offshore East Kalimantan, Indonesia, three-dimensional seismic reflectors can be traced downslope from a lowstand delta to a basin-floor fan, giving insight into depositional processes controlling the distribution of sands that serve as hydrocarbon reservoirs in many ancient deep-water settings. The studied interval includes the last three Pleistocene cycles (10–330 ka; each 110 k.y. in duration). Cycles on the shelf are dominated by progradational packages deposited during highstands and falling eustatic sea level. Progradational packages are separated by parallel reflectors and carbonate buildups of the transgressive systems tracts. During the last two lowstands of sea level (18 and 130 ka), coarse clastics were not deposited in deep-water environments because growth faults and regional subsidence prevented lowstand deltas from reaching the slope. During the lowstand of sea level that ended at about 240 ka, a delta prograded over the previous shelf edge, and sand-rich sediments spilled onto the slope.
机译:在印度尼西亚东加里曼丹近海,可以将三维地震 反射镜从低三角洲向下倾斜到 盆底扇,从而深入了解沉积过程 < / sup>控制在许多古代深水环境中充当碳氢化合物 储层的砂的分布。研究的 间隔包括最近的三个更新世周期(10–330 ka;持续时间分别为110 k.y.)。架子上的循环主要由高潮期和下降 静海平面期间沉积的堆积包裹主导。渐进式包装被 平行反射器和海侵 系统域的碳酸盐堆积所分隔。在最近两个海平面低位(18 和130 ka)中,粗粒碎屑未沉积在深水 环境中,因为生长断层和区域沉降阻止了 < / sup>到达山坡的低位三角洲。在结束于约240 ka的海平面低位 期间,三角洲在 先前的陆架边缘上扩展,富砂沉积物洒到了 坡度。

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  • 来源
    《AAPG Bulletin》 |2004年第1期|00000021-00000046|共26页
  • 作者单位

    Unocal Corporation, Sugar Land, Texasasaller@unocal.com;

    Unocal Corporation, Sugar Land, Texas;

    Unocal Indonesia, Balikpapan, Indonesia;

    Unocal Indonesia, Jakarta, Indonesia;

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