南海深水海盆沉积物压实作用及影响因素

发布时间：2018-03-07 12:18

本文选题：正常压实系数　切入点：沉积物组分　出处：《海洋地质与第四纪地质》2017年03期 　论文类型：期刊论文

【摘要】：深水盆地沉积物的压实作用直接关系到沉积物本身的稳定性,沉积物压实不均衡可能引发严重的深水地质灾害,如海底滑坡、浅层气、浅水流等,同时对钻井工程也会造成严重影响,如出现井漏、井喷,甚至引发平台不稳定至坍塌。选取了南海深水盆地ODP184航次1144、1146、1148站位与IODP349航次U1431、U1432、U1433、U1435站位的测井数据进行分析,获得了南海深水盆地沉积物正常压实系数与沉积物组分、沉积速率、沉积物埋深等多个影响因素的关系,初步建立起南海深水盆地不同深度沉积物正常压实系数与初始孔隙度的变化规律。为今后研究南海深水盆地地质灾害,特别是超压地质灾害提供参考。
[Abstract]:The compaction of sediment in deep water basin is directly related to the stability of sediment itself. The uneven compaction of sediment may lead to serious deep-water geological disasters, such as submarine landslide, shallow gas, shallow water flow, etc. At the same time, the drilling engineering will also be seriously affected, such as well leakage, well blowout, and even causing platform instability to collapse. The logging data at station 11444 / 1146 / 1148 and station U1431 / U1431 / U1432U1433 / U1435 in the South China Sea deep water basin are selected for analysis. The relationship between sediment normal compaction coefficient and sediment composition, sedimentation rate and sediment burial depth in the South China Sea deepwater basin is obtained. The variation law of the normal compaction coefficient and initial porosity of sediments at different depths in the South China Sea deepwater basin is established preliminarily, which provides a reference for the study of geological hazards, especially overpressure geological disasters, in the deep water basin of the South China Sea in the future.
【作者单位】：中国科学院海洋地质与环境重点实验室中国科学院海洋研究所;中国科学院大学;中国科学院深海科学与工程研究所;
【基金】：国家科技部973项目“海洋深水油气安全高效钻完井基础研究”子课题“深水钻井浅层地质灾害形成机理及预测方法”(2015CB251201)
【分类号】：P736.21

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