地震多属性技术组合在泸州页岩气区块构造解释中的综合应用

doi:10.11720/wtyht.2022.1575

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摘要

泸州页岩气区块位于四川盆地内南部,经历多期构造演化,不仅发育非常复杂的断裂,垂向上还发育多套滑脱层,因此构造具有多期次、多走向、多层系等特征。针对研究区的构造解释难点,集成了一套地震多属性技术组合,即地震多属性优选和属性融合技术辅助断层解释、构造异常值属性识别微构造、地震属性沿层切片技术分析构造时空演化特征、多次叠加蚂蚁追踪属性技术预测裂缝发育。应用该技术组合,完成了区内复杂断层的精细解释,有效刻画了微构造发育特征,捋清了区内的构造期次和展布,提高了裂缝预测精度,描述了裂缝发育特征,为下一步的平台部署提供坚实的数据和基础。

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	陈更生
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	潘元炜

关键词 ：地震多属性, 属性融合, 构造异常属性, 沿层切片, 蚂蚁追踪属性

Abstract：

The Luzhou shale gas block,which is located in the southern Sichuan Basin,has undergone multi-stage tectonic evolution and has complex faults and multiple sets of vertical detachment layers,forming the characteristics of multiple stages,multiple strikes,and multiple layers.To overcome the difficulties with the tectonic interpretation of the study area,this study combined a set of seismic multi-attribute techniques,namely using seismic multi-attribute optimization and attribute fusion technique to assist fault interpretation,using structural anomaly attribute to identify microstructures,using seismic attribute slicing technique to analyze the characteristics of tectonic temporal and spatial evolution,and using multi-superposition ant tracking attribute technique to predict fracture development.Using this technique combination,this study completed the fine-scale interpretation of complex faults in the area, effectively characterized the development of microstructures,clarified the tectonic stages and distribution in the area,improved the fracture prediction accuracy,and described the development characteristics of fractures.The results of this study will provide solid data and a foundation for the next platform deployment.

Key words： seismic multi-attribute attribute fusion structural anomaly attribute strata slicing ant tracking

收稿日期: 2021-11-01 修回日期: 2022-08-25 出版日期: 2022-12-20

ZTFLH:

P631.4

通讯作者: 谢清惠

作者简介: 陈更生(1963-),男,教授级高级工程师,博士,主要从事石油天然气勘探开发工作,现任中国石油西南油气田公司页岩气勘探开发首席专家。Email:chengs@petrochina.com.cn

引用本文:

陈更生, 谢清惠, 吴建发, 赵春段, 徐尔斯, 潘元炜. 地震多属性技术组合在泸州页岩气区块构造解释中的综合应用[J]. 物探与化探, 2022, 46(6): 1349-1358.
CHEN Geng-Sheng, XIE Qing-Hui, WU Jian-Fa, ZHAO Chun-Duan, XU Er-Si, PAN Yuan-Wei. Comprehensive application of the seismic multi-attribute technique combination in the tectonic interpretation of the Luzhou shale gas block. Geophysical and Geochemical Exploration, 2022, 46(6): 1349-1358.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2022.1575 或 https://www.wutanyuhuatan.com/CN/Y2022/V46/I6/1349

Fig.1 地震多属性组合技术在泸州区块构造解释中的应用流程

Fig.2 沿目的层提取的地震多属性切片
a—方差属性;b—最大曲率属性;c—边缘检测属性;①—1号断层;②—2号断层

Fig.3 沿目的层提取的地震多属性融合切片
a—最大曲率属性与边缘检测属性融合属性切片;b—断层多边形与融合属性切片叠合;①—1号断层;②—2号断层

Fig.4 沿目的层提取构造异常属性切片

Fig.5 沿目的层提取构造异常属性切片

Fig.6 沿目的层提取的蚂蚁追踪属性切片
a—主动蚂蚁追踪属性切片;b—主动+被动叠加蚂蚁追踪属性切片;c—图a局部放大;d—图b局部放大

Fig.7 实钻井附近蚂蚁追踪结果与最大曲率和构造异常属性的对比
a—L₁/L₂井井周最大曲率属性;b—L₃井井周最大曲率属性;c—L₄井井周最大曲率属性;d—L₁/L₂井井周构造异常属性;e—L₃井井周构造异常属性;f—L₄井井周构造异常属性;g—L₁/L₂井井周蚂蚁追踪属性;h—L₃井井周蚂蚁追踪属性;i—L₄井井周蚂蚁追踪属性

Fig.8 实钻井的电成像测井裂缝玫瑰花图

Fig.9 沿目的层开一定时窗提取的断片
a—蚂蚁体属性大于-0.5的断片提取结果;b—蚂蚁体属性大于-0.9的断片提取结果;c—局部放大

Fig.10 研究区内断裂特征统计分析图表
a—断片倾角直方图;b—断片走向玫瑰花图;c—断片长度直方图

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