盐构造与深水水道的交互作用——以下刚果盆地为例

发布时间：2018-05-28 19:43

本文选题：盐构造 + 深水水道　；参考：《沉积学报》2017年06期

【摘要】：在被动大陆边缘盆地,水道作为深水油气的主要储集体,是深水油气勘探的重要目标。在下刚果盆地,由于盐构造的多期活动导致对水道砂体的展布规律认识不清。研究水道和盐构造的交互作用方式有利于预测含盐盆地中水道砂体的平面分布。利用三维地震资料,在盐构造与深水水道广泛发育的下刚果盆地研究盐构造与深水水道的交互作用,建立了盐构造与水道的交互作用模式。盐构造与水道的交互作用方式主要有6种,分别为限制、改向、封堵、侵蚀、迁移和剥蚀。盐构造的活动时期与水道形成演化时期的先后关系、水道中重力流的侵蚀能力决定了盐构造与水道的交互作用方式。水道经过早期发育的盐构造且水道中重力流侵蚀能力较弱多发生限制和改向;若水道中重力流侵蚀能力很强,可发生水道对盐构造的侵蚀;若盐构造的规模较大,其可阻止水道向下游输送沉积物并造成水道中重力流的回流,形成朵体沉积。若水道与盐构造同时活动多发生水道的迁移。晚期活动的盐构造可导致其上方的水道沉积体遭受剥蚀。
[Abstract]:In the passive continental margin basin, the waterway is the main reservoir of deep water oil and gas. It is an important target for the exploration of deepwater oil and gas. In the lower Congo basin, the multi period activity of salt structure is not clear about the distribution law of the sand body of the waterway. Using three-dimensional seismic data, the interaction between salt structure and deep water channel is studied by the interaction of salt structure and deep water channel in the lower Congo basin, which is widely developed in salt structure and deepwater channel. The interaction mode of salt structure and waterway is established. There are 6 main types of interaction between salt structure and waterway, which are restricted, modified, plugging, erosion, migration and denudation. The relationship between the period of the formation and evolution of the waterway and the evolution period of the waterway, the erosion capacity of the gravity flow in the waterway determines the interaction between the salt structure and the waterway. The channel passes through the early development of the salt structure and the erosion ability of the gravity flow in the waterway is limited and changed, and the waterway can occur if the gravity flow in the water channel is very strong. The erosion of salt structure; if the scale of the salt structure is larger, it can prevent the sediment transport from the channel to the downstream and cause the reflux of the gravity flow in the waterway to form a bulk deposit.
【作者单位】：中海油研究总院;中国石油管道局工程有限公司国际事业部;浙江大学海洋学院;中国石油化工股份有限公司石油勘探开发研究院;中海石油(中国)有限公司深圳分公司;
【分类号】：P618.13

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