| 航空重磁构造分层与新层系研究——以松辽盆地嫩江—林甸地区为例 |
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| 引用本文：刘燕戌,赖燕玲,曹安琪,高姗,王宁,孟维棣,杨冬红,王立杰.2023.航空重磁构造分层与新层系研究——以松辽盆地嫩江—林甸地区为例[J].地球学报,44(3):455-466. |
| DOI：10.3975/cagsb.2022.062101 |
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| 基金项目:中国地质调查局地质调查项目“松辽盆地及外围航空物探调查”(编号: DD20190028) |
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| 中文摘要:本文聚焦盆地结构和新层系研究, 基于最新采集的航空重磁综合测量数据和岩石样本物性数据, 结合重点地区井震资料, 对异常数据进行多尺度构造分层, 构建了松辽盆地中北部浅—中—深三维空间结构格架; 通过定性与定量研究, 系统分析了研究区上白垩统底面、中生界底面、磁性基底顶面等深度以及上白垩统、上侏罗统—下白垩统、上古生界等厚度, 为研究区域上古生界、上侏罗统—下白垩统等含油气新层系、探讨盆地结构特征对油气的控制作用提供地球物理证据。研究结果表明, 研究区不同地段的上古生界残留厚度差异性显著, 厚度变化范围在0~9300 m之间, 西部和北东部残留厚度较大, 北部和东部局部缺失; 上侏罗统—下白垩统厚度和埋藏深度在研究区北、南部明显不同, 总体呈现南部较厚而且埋藏较深北部较薄而且局部缺失的特征。 |
| 中文关键词:航空重磁 构造分层 新层系 嫩江—林甸 松辽盆地 |
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| Airborne Gravity and Magnetic Tectonolayering and New Strata:Exemplified by Nenjiang–Lindian Area of Songliao Basin |
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| Abstract:In this study, the structural characteristics and the new hydrocarbon strata series of Songliao basin were investigated using structural stratification based on the latest airborne gravity and magnetic data, density and magnetic measurements, and drilling and seismic data, and a three-dimensional framework was constructed in the shallow, middle, and deep strata of the basin. This study provides a systematic analysis of the depths of the bottoms of the Upper Cretaceous and the Mesozoic, the depth of the magnetic basement top, and the thicknesses of the Upper Cretaceous, Upper Jurassic–Lower Cretaceous, and Upper Paleozoic using a combination of qualitative analysis and quantitative calculation, which provide important geophysical evidences of the new petroliferous strata survey of the regional Upper Paleozoic and Upper Jurassic–Lower Cretaceous, including its influence on the different structural characteristics of oil and gas. The results show that the Upper Paleozoic strata with a thickness of 0–9300 m is mainly distributed in the western and northeastern parts of the study area, and was absent in the localities of the western parts. The Upper Paleozoic strata has significant differences in different sections in the study area. The thickness and depth of Upper Jurassic–Lower Cretaceous varies considerably from the north to the south, being thicker and deeper in the north and thinner and shallower in the south. |
| keywords:airborne gravity and magnetic tectonolayering new strata Nenjiang–Lindian Songliao basin |
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