| LI Quan,WU Wei,YU Shui,KANG Hongquan,TONG Liqing,CAO Xiangyang,LIU Xiaolong. 2017. The application of three-dimensional seismic spectral decomposition and semblance attribute to characterizing the deepwater channel depositional elements in the Taranaki Basin of New Zealand. Acta Oceanologica Sinica, 36(9):79－86 |
| The application of three-dimensional seismic spectral decomposition and semblance attribute to characterizing the deepwater channel depositional elements in the Taranaki Basin of New Zealand |
| 应用3D谱分解和相干属性刻画深水水道沉积要素，以新西兰塔纳基盆地为例 |
| Received:July 16, 2016 |
| DOI：10.1007/s13131-017-1113-0 |
| Key words:deepwater channel spectral decomposition semblance depositional elements deepwater Taranaki Basin |
| 中文关键词: 深水水道 谱分解 相干 沉积要素 深水塔纳基盆地 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41102059 and 91328201; the National Science and Technology Major Project of China under contract No. 2017ZX05032-001. |
| Author Name | Affiliation | E-mail | | LI Quan | Overseas Evaluation Center, China National Offshore Oil Corporation Research Institute, Beijing 100028, China | | | WU Wei | Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, China
Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Economic Region, Henan Polytechnic University, Jiaozuo 454003, China | wei@hpu.edu.cn | | YU Shui | Overseas Evaluation Center, China National Offshore Oil Corporation Research Institute, Beijing 100028, China | | | KANG Hongquan | Overseas Evaluation Center, China National Offshore Oil Corporation Research Institute, Beijing 100028, China | | | TONG Liqing | Bureau of Geophysical Prospecting Offshore, China National Petroleum Corporation, Tianjin 300280, China | | | CAO Xiangyang | Overseas Evaluation Center, China National Offshore Oil Corporation Research Institute, Beijing 100028, China | | | LIU Xiaolong | Overseas Evaluation Center, China National Offshore Oil Corporation Research Institute, Beijing 100028, China | |
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| Abstract: |
| In the past few years, three-dimensional (3-D) seismogram has become an essential tool for the interpretation of subsurface stratigraphy and depositional systems. Seismic stratigraphy in conjunction with seismic geomorphology has elevated the degree to which seismic data can facilitate geological interpretation, especially in a deepwater environment. Technologies such as time slicing and interval attribute analysis can enhance geomorphological interpretations, and, when integrated with stratigraphic analyses, can yield insights regarding distribution of seal and reservoir facies. Multiple attributes corendering can further bring out features of geological interest that other technologies may overlook. This method involves corender spectral decomposition components (SDC) with semblance attributes to describe the distribution of deepwater channel elements and the boundaries of deepwater sinuous channel. Applying this technology to four elements is observed: (1) point-bars, (2) migration of channel meander loops, (3) channel erosion/cut, and (4) avulsion. The planview expression of the deepwater channel ranges from low sinuosity to high sinuosity. Furthermore, this technology has enabled interpreters to visualize details of complex depositional elements and can be used to predict net-to-gross ratio in channel systems, which can be incorporated into borehole planning for exploration as well as development needs to improve risk management significantly. The technology is applied to the study area in an effort to illustrate the variety of interpretation technologies available to the geoscientist. |
| 中文摘要: |
| 过去的几十年里，三维地震技术已经成为描述地下地层和沉积体系必不可少的工具。地震地层学和地震地貌学的快速发展大幅度提升了应用3D地震数据解释深水区沉积地层的能力。时间切片和层属性分析等技术能够增强对古地貌的解释，并且当与地层分析手段相结合时，能够对储层和盖层分布进行预测。多属性叠加技术能够进一步突出其常规技术方法容易忽视的地质现象。本文提出将频谱分解的不同组分与相干属性叠加突出深水水道沉积要素的边界和砂体分布，进而精细描述水道结构要素。通过应用该技术在研究区识别出四种沉积要素（1）点坝，（2）迁移的曲流环，（3）侵蚀水道，（4）决口。研究发现深水水道平面上从低弯曲度向高弯曲度变化。这个技术方法有助于解释人员识别复杂的沉积要素并且可以定性预测水道富砂要素，这对于勘探和开发中降低钻井风险是至关重要的。 |
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