琼东南盆地莺歌海组重力流沉积演化过程

发布时间：2018-05-19 09:51

本文选题：滑塌 + 浊积水道　；参考：《沉积学报》2017年03期

【摘要】：琼东南盆地是我国重要的油气富集区和水合物前景区,研究其深水沉积体系的展布和演化过程对于油气和水合物勘探具有重要意义。利用高精度三维地震资料,对琼东南甘泉凸起西部陆坡沉积体系进行研究。通过地震相识别的方法,分析了该地区浊积水道和滑塌体两种不同成因沉积体的沉积特征:浊积水道受底流作用影响,和陆坡走向平行,发育有不对称的天然堤;通过地震剖面的精细解释,在水道上部和下部发育两套滑塌体:下部滑塌体为正常滑塌体,由多期的滑塌过程组成,滑塌体叠置现象明显;上部为水道注入型滑塌体,由于外部流体的注入,使水体的密度和黏度下降,故滑塌范围较广,成层性明显。通过均方根属性切片与沉积模式重建的方法,将其沉积过程分成三期:即滑塌、侵蚀和再滑塌并受底流改造三个阶段。
[Abstract]:Qiongdongnan Basin is an important oil and gas accumulation area and hydrate front area in China. It is of great significance to study the distribution and evolution of deep-water sedimentary system in Qiongdongnan Basin for hydrocarbon and hydrate exploration. The sedimentary system on the western slope of Ganquan uplift in southeast Hainan was studied by using three dimensional seismic data with high precision. By means of other methods of seismic understanding, the sedimentary characteristics of two different genetic sedimentary bodies in this area are analyzed: the turbidite channel is affected by the underflow and is parallel to the trend of the continental slope, and there are asymmetrical natural levees; Through the detailed interpretation of the seismic section, two sets of collapse bodies are developed in the upper and lower part of the watercourse: the lower part of the landslide is a normal one, which is composed of several stages of the process of collapse, and the superposition of the landslide is obvious, and the upper part is a watercourse injected type. Because of the external fluid injection, the density and viscosity of the water decreased, so the sloughing range was wider and the stratification was obvious. The deposition process is divided into three stages by the method of root mean square slicing and sediment model reconstruction: sliding, erosion, re-collapse and reconstruction by the bottom flow.
【作者单位】：中国地质大学(北京)能源学院;中国科学院地质与地球物理研究所;国家海洋局第一海洋研究所海洋沉积与环境国家海洋局重点实验室;国土资源部广州海洋地质调查局;
【基金】：国家自然科学基金项目(41272132) 国家专项项目(GZH2011003-05-02-02)~~
【分类号】：P618.13

【相似文献】