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

机译：加里曼丹东部古帝盆地近新世和上新世深水沉积物的比较

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Exploration in the deepwater Kutei Basin, offshore East Kalimantan has resulted in a number of hydrocarbon discoveries in Pliocene and Late Miocene sediments. A series of depositional models of slope and basin floor sediments have been generated from a study of Recent sediments in this basin (Fowler et al., 2001). The aim of this study was to calibrate these Recent models with drilled Mio-Pliocene examples and then to assess their value as analogues to assist future drilling in the Kutei Basin. The deepwater Kutei Basin contains highly structured and relatively unstructured slope provinces and Mio-Pliocene depositional elements from both structured and unstructured slope and probable basin floor are described and compared to their Recent equivalents. A seismic and biostratigraphically-calibrated sequence stratigraphic framework and 3D seismic techniques such as dip attribute displays, variance cube and amplitude extractions have been employed to visualise and characterise depositional elements. Borehole penetrations allow the identification of lithofacies and diagnostic wireline log motif and the assessment of reservoir quality in each of these depositional elements. Similarities between Recent and Mio-Pliocene deepwater deposits include broad similarity of depositional elements including debrites, slope channels, channel-levee deposits and various fan deposits. Similar stacking patterns are identified and slope gradient appears to similarly influence nature of sedimentation. In all cases, the narrowing and widening of channel belts across changes in slope gradient is clearly seen and toe-of-slope gradient change results in the largest volume of coarse sediment deposition. Differences between the Recent and Mio-Pliocene sediments include the apparent subdued development of pre-Pliocene channel-levees and the identification of Mio-Pliocene backstepping mini-basin fills. Mio-Pliocene fans have been subdivided into those fed by channels and canyons and those fed by leveed-channels rather than the slope and basin floor fan categories used for Recent deposits. The vertical facies succession seen in the Recent sediments, from initial debrites through basin floor fans or channelised complexes to channel levees is only hinted at in the Miocene sediments. These geological models are being used for the prediction of optimum sand-prone facies development and will thus help reduce the risk associated with future exploration and appraisal drilling activity.
机译：在加里曼丹东部近海的深水库提盆地进行的勘探已在上新世和中新世晚期沉积物中发现了许多碳氢化合物。通过对该盆地近期沉积物的研究，已经生成了一系列斜坡和盆地底部沉积物的沉积模型（Fowler等，2001）。这项研究的目的是用钻入的上新世实例对这些最近的模型进行校准，然后评估它们作为类似物的价值，以协助将来在库提盆地进行钻探。深水库提盆地包含高度结构化和相对非结构化的坡省，并描述了来自结构化和非结构化坡度以及可能的盆地底板的上新统上新世沉积元素，并将其与最近的等效条件进行了比较。地震和生物地层校正的层序地层格架和3D地震技术（如倾角属性显示，方差立方和振幅提取）已被用来可视化和表征沉积元素。钻孔穿透可以识别岩相和诊断性测井曲线图案，并可以评估每种沉积元素中的储层质量。最近的和上新世的深水沉积物之间的相似之处包括沉积元素的广泛相似性，包括碎屑，斜坡通道，河道堤坝沉积物和各种扇形沉积物。确定了相似的堆积模式，并且坡度梯度似乎也类似地影响了沉积的性质。在所有情况下，都可以清楚地看到，随着坡度梯度的变化，河道带的变窄和变宽，并且坡脚趾坡度的变​​化导致了最大的粗沉积物沉积。新近和上新世沉积物之间的差异包括上新世前河道堤坝的明显减弱发展，以及新上新世后退微盆地填充物的识别。庙宇上新世的风扇被细分为由河道和峡谷供养的风扇和由堤道供气的风扇，而不是用于近期沉积的斜坡和盆地底板风扇。在中新世沉积物中，仅暗示了从最近的沉积物中看到的垂直相序，从最初的碎屑到盆底扇或通道化的复合体再到河堤。这些地质模型被用于预测最佳的易发砂岩相发育，因此将有助于降低与未来勘探和评估钻探活动有关的风险。

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