徐思煌,肖键波,王通,王诗琪

• 1:中国地质大学(武汉)资源学院

摘要(Abstract)：

对于页岩气、水溶气等非常规天然气资源早期选区评价，往往因为缺乏地震资料导致难以依赖地震构造解释获得目的层的埋深，故借助其他非地震资料有效预测目的层区域性埋深具有重要意义。区域地质图与数字高程模型(DEM)都是广泛覆盖且容易获取的基础性资料。利用区域地质图蕴含的地层产状、地下构造起伏趋势、地层埋深和地表出露地层年代的关系等信息，再叠合DEM地表高程，建立了一种有效预测目的层构造高度和埋深的新方法。利用四川盆地及周缘地区36幅1∶20万区域地质图和美国航空航天局(NASA)数字高程模型资料，预测了该区下志留统龙马溪组底界埋深，据此编制的龙马溪组底界埋深等值线图为该区页岩气保存条件评价提供了重要参数。该方法不仅可为页岩气早期选区评价提供有效支撑，还可应用于深部高压含水层中水溶气的资源评价、深部咸含水层CO_2地质封存的构造优选。

关键词(KeyWords)： 海相地层;埋深预测;区域地质图;数字高程模型;龙马溪组;页岩气;四川盆地

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“四川盆地及周缘页岩气形成富集条件、选区评价技术与应用”(2017ZX05035-001-003)

作者(Author): 徐思煌,肖键波,王通,王诗琪

DOI: 10.19509/j.cnki.dzkq.tb20230399

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