神狐海域水合物钻探区第四纪米氏旋回高频层序地层划分
发布时间：2018-11-09 17:14
【摘要】：基于高分辨率2D地震资料,建立了珠江口盆地白云凹陷第四纪层序地层格架,将第四纪沉积充填序列划分为3个体系域,即低位体系域(LST)、海侵体系域(TST)、高位体系域(HST)。根据陆坡进积特征和地层叠加样式、垂向上侵蚀特征变化(其上见下切水道)、中频强振幅同相轴的空间可追踪性等地震反射特征,将高位体系域(HST)进一步划分为两个沉积旋回单元HST-I、HST-II。在等时地层格架的约束下,以神狐海域水合物钻探区well-I钻井作为研究对象,选择自然伽马曲线(GR)通过频谱分析进行米兰科维奇旋回特征的研究,识别出偏心率周期(95ka)、斜率周期(40ka)和岁差周期(22、19ka)。研究区第四纪沉积充填序列主要受偏心率周期(95ka)的控制,偏心率(95ka)对应于旋回厚度11.494m,以此周期和对应的旋回厚度计算出钻探区第四纪沉积速率为12.1cm/ka。通过构建滤波器对测井曲线进行滤波处理,发现95ka的偏心率控制的优势旋回个数在20个左右。对斜率周期(40ka)识别出的高频旋回采用Fischer图解法求取其可容纳空间变化曲线,检验了高精度层序地层划分的正确性。
[Abstract]:Based on 2D seismic data with high resolution, the Quaternary sequence stratigraphic framework of Baiyun sag in Zhujiang River mouth Basin was established. The Quaternary sedimentary filling sequence was divided into three system tracts, namely, (LST), transgressive system tracts (TST),) in low system tracts. High system tract (HST). According to the characteristics of continental slope progradation and stratigraphic superposition, the vertical erosion characteristics (which can be seen in the undercut channel), the spatial traceability of the if amplitude and the spatial traceability of the same phase axis, etc. The (HST) of high system tracts is further divided into two sedimentary cycle units HST-I,HST-II. Under the constraint of isochronous stratigraphic framework, the natural gamma curve (GR) is selected to study the characteristics of Milankovich cycle by spectrum analysis, taking the well-I drilling area of hydrate drilling area in Shenhu sea area as the research object. The eccentricity period (95ka), slope period (40ka) and precession period (22 ~ 19ka) are identified. The Quaternary sedimentary filling sequence in the study area is mainly controlled by the eccentricity period (95ka). The eccentricity ratio (95ka) corresponds to the cyclic thickness of 11.494m. the sedimentation rate of the Quaternary period in the drilling area is calculated to be 12.1 cm / KA by using this period and the corresponding cyclic thickness. By constructing a filter to filter the log curves, it is found that the number of dominant cycles in the eccentricity control of 95ka is about 20. The high frequency cycle identified by slope period (40ka) is obtained by Fischer graphic method, which verifies the accuracy of high precision sequence stratigraphic division.
【作者单位】： 中国科学院天然气水合物重点实验室;中国地质调查局广州海洋地质调查局;中国地质调查局青岛海洋地质研究所;中海石油有限公司湛江分公司;
【基金】：国家自然科学基金项目(41576048) 油气藏地质及开发工程国家重点实验室(成都理工大学)开放基金项目(PLC201407) 中国地质大学构造与油气资源教育部重点实验室开放基金(TPR-2014-14) 中科院可再生能源重点实验室基金项目(y507j61001)
【分类号】：P736.22;P744.4
本文编号：2321061
[Abstract]:Based on 2D seismic data with high resolution, the Quaternary sequence stratigraphic framework of Baiyun sag in Zhujiang River mouth Basin was established. The Quaternary sedimentary filling sequence was divided into three system tracts, namely, (LST), transgressive system tracts (TST),) in low system tracts. High system tract (HST). According to the characteristics of continental slope progradation and stratigraphic superposition, the vertical erosion characteristics (which can be seen in the undercut channel), the spatial traceability of the if amplitude and the spatial traceability of the same phase axis, etc. The (HST) of high system tracts is further divided into two sedimentary cycle units HST-I,HST-II. Under the constraint of isochronous stratigraphic framework, the natural gamma curve (GR) is selected to study the characteristics of Milankovich cycle by spectrum analysis, taking the well-I drilling area of hydrate drilling area in Shenhu sea area as the research object. The eccentricity period (95ka), slope period (40ka) and precession period (22 ~ 19ka) are identified. The Quaternary sedimentary filling sequence in the study area is mainly controlled by the eccentricity period (95ka). The eccentricity ratio (95ka) corresponds to the cyclic thickness of 11.494m. the sedimentation rate of the Quaternary period in the drilling area is calculated to be 12.1 cm / KA by using this period and the corresponding cyclic thickness. By constructing a filter to filter the log curves, it is found that the number of dominant cycles in the eccentricity control of 95ka is about 20. The high frequency cycle identified by slope period (40ka) is obtained by Fischer graphic method, which verifies the accuracy of high precision sequence stratigraphic division.
【作者单位】： 中国科学院天然气水合物重点实验室;中国地质调查局广州海洋地质调查局;中国地质调查局青岛海洋地质研究所;中海石油有限公司湛江分公司;
【基金】：国家自然科学基金项目(41576048) 油气藏地质及开发工程国家重点实验室(成都理工大学)开放基金项目(PLC201407) 中国地质大学构造与油气资源教育部重点实验室开放基金(TPR-2014-14) 中科院可再生能源重点实验室基金项目(y507j61001)
【分类号】：P736.22;P744.4
【相似文献】
相关期刊论文 前1条
1 万丽芬;周兴海;吴嘉鹏;王甜;颜方方;;深水层序地层划分——以孟加拉扇某三维区块为例[J];海洋石油;2013年02期
，本文编号：2321061
本文链接：https://www.wllwen.com/kejilunwen/haiyang/2321061.html
