| 渤海海域大型太古界潜山储层形成条件及地质意义 |
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| 引用本文： | 周心怀,王清斌,冯冲,叶涛,刘晓健,郝轶伟,周淋.渤海海域大型太古界潜山储层形成条件及地质意义[J].地球科学,2022,47(5):1534-1548. |
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| 作者姓名： | 周心怀 王清斌 冯冲 叶涛 刘晓健 郝轶伟 周淋 |
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| 作者单位： | 1.中海石油(中国)有限公司海南分公司, 海南海口 570100 |
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| 基金项目： | 国家“十三五”科技重大专项（No.2016ZX05024003）； |
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| 摘 要： | 渤海海域近几年在太古界潜山领域获得了多个大型油气田发现，其中，渤中19-6构造天然气储量超过千亿方，展示了该领域巨大的勘探潜力.变质岩潜山储层规模是制约变质岩勘探的关键因素，落实规模性潜山储层形成条件具有重要的理论和实际意义.综合应用岩心、薄片、扫描电镜等实验资料以及地震资料分析了渤海海域太古界大型变质岩潜山储层形成条件.研究结果表明:富脆性长英质矿物是渤海海域太古界变质岩大型潜山储层发育的重要物质基础，长英质矿物含量控制了裂缝发育程度，也为风化淋滤和深部流体等的溶蚀作用提供了基础条件；多类型压性构造控制了大型裂缝型储层的形成；风化淋滤作用对太古界潜山储层纵向发育的明显控制作用，是影响太古界潜山储层纵向分带的主要因素；深部流体对太古界潜山储层具有重要改善作用，扩大了裂缝的规模.在上述形成条件指导下，建立了太古界大型潜山储层成因模式.
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| 关 键 词： | 渤海海域 变质岩 太古界 潜山储层 形成条件 油气地质 |
| 收稿时间： | 2021-12-09 |
Formation Conditions and Geological Significance of Large Archean Buried Hill Reservoirs in Bohai Sea |
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| Zhou Xinhuai,Wang Qingbin,Feng Chong,Ye Tao,Liu Xiaojian,Hao Yiwei,Zhou Lin.Formation Conditions and Geological Significance of Large Archean Buried Hill Reservoirs in Bohai Sea[J].Earth Science-Journal of China University of Geosciences,2022,47(5):1534-1548. |
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| Authors: | Zhou Xinhuai Wang Qingbin Feng Chong Ye Tao Liu Xiaojian Hao Yiwei Zhou Lin |
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| Abstract: | In recent years, many large oil and gas fields of the Archaean buried hills in the Bohai Sea have been discovered, among which, the natural gas reserves of Bozhong 19-6 structure exceed 100 billion cubic meters, showing the huge exploration potential in this field. The scale of buried hill reservoirs is the key factor restricting the exploration of metamorphic rock. It is of great theoretical and practical significance to study the formation conditions of large-scale buried hill reservoirs. Based on the experimental data of cores, thin sections, scanning electron microscopy and seismic data, in this paper it systematically analyzes the formation conditions of several large metamorphic buried hill reservoirs in the Bohai Sea area. The results show follows: (1) The brittle felsic minerals are the important material basis for the development of large buried hill reservoirs of Archean metamorphic rocks in Bohai Sea area, which are not only conducive to the development of fractures, but also provide favorable conditions for weathering leaching and dissolution of deep fluids. (2) The multiple types of compressive structures control the formation of large fractured reservoirs. (3) Weathering and leaching is an important factor in the vertical zonation of Archean buried hill reservoir, which obviously controls the vertical development of Archean buried hill reservoirs. (4) The deep fluid plays an important role in improving the Archean buried hill reservoirs, expanding the scale of fractures. Under the guidance of the above formation conditions, the genetic model of Archean large buried hill reservoirs is established. |
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