| 西湖凹陷H构造群及周边花港组沉积环境及砂体刻画 |
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| 引用本文： | 何苗,侯国伟,秦兰芝,陆嫣,谢晶晶.西湖凹陷H构造群及周边花港组沉积环境及砂体刻画[J].现代地质,2018,32(1):162. |
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| 作者姓名： | 何苗 侯国伟 秦兰芝 陆嫣 谢晶晶 |
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| 作者单位： | (中海石油(中国)有限公司 上海分公司，上海200335) |
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| 基金项目： | 国家科技重大专项“东海深层低渗-致密天然气勘探开发技术”课题2“东海深层大型气田勘探评价技术”任务9“深层大型气田勘探评价技术集成及应用”(2016ZX05027-002-009)。 |
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| 摘 要： | 西湖凹陷H构造群及周边为中央反转带中南部区域大型反转挤压背景下形成的区块，紧邻富凹，具有油气潜力。为了更好地寻找有利勘探区带以及富砂层位，结合地震反射特征、成像测井资料、岩石以及古生物资料对H构造群及周边花港组的沉积背景进行了研究，认为花港组发育于构造稳定的中等水动力环境下，受多向水流影响，孢粉及其他生物组合表明花港组整体处于淡水环境。通过测井、取心资料分析认为花港组为网状河沉积，其中网状水道、交错坝以及纵向砂坝砂体十分发育。此外，结合连井和地震剖面对河道砂体的垂向叠置及展布规律的研究表明，砂体垂向叠置关系以单边对接式、多边对接式及不完全切叠式为主，平面以带状、交织带状和网状形态为主，深部河道砂体具一定规模。
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| 关 键 词： | 西湖凹陷 花港组 沉积 微相 砂体 |
Sedimentary Facies and Sandbody Depiction of the Huagang Formation of H Structural Group and Its Adjacent Areas in Xihu Depression |
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| HE Miao,HOU Guowei,QIN Lanzhi,LU Yan,XIE Jingjing.Sedimentary Facies and Sandbody Depiction of the Huagang Formation of H Structural Group and Its Adjacent Areas in Xihu Depression[J].Geoscience——Journal of Graduate School,China University of Geosciences,2018,32(1):162. |
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| Authors: | HE Miao HOU Guowei QIN Lanzhi LU Yan XIE Jingjing |
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| Institution: | (Shanghai Branch, CNOOC Ltd, Shanghai200335, China) |
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| Abstract: | H structural group and its adjacent areas of Xihu Depression were formed under the background of huge extrusion and reversion, which located near the rich depression and proved to have potential oil and gas. In order to find the beneficial areas and the rich sand strata, this paper combines the characteristics of seismic reflection, FMI logging data, lithology data and paleontology data to do research on sedimentary background, considering that the Huagang Formation deposits under moderate hydrodynamic force and is affected by multidirection fluid. The pollen and other paleontological association suggest that Huagang Formation is under fresh water environment. According to logging and coring data, it is proved that the Huagang Formation develops anastomosing river deposits, and anastomosing channels, cross bar and vertical bar are well developed among those microfacies. Furthermore, combining the well to well correlation and seismic profiles together, the vertical overlap and planar distribution characteristics of sandbodies are analyzed, indicating that the single jointed, multilateral jointed and incomplete folded sandboies are mainly deposited, and the planar sandbodies are mainly stripe, cross linking stripe and net shaped. It is proved that the deep deposited sandbodies have a great potential. |
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| Keywords: | Xihu Depression Huagang Formation sedimentation microfacies sandbody |
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