尼日利亚南部比达盆地和北部阿南布拉盆地热制度评估:从航磁和遥感数据中获得的启示

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS pure and applied geophysics Pub Date : 2024-06-13 DOI:10.1007/s00024-024-03516-x
Naheem Banji Salawu, Olusola Johnson Ojo
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引用次数: 0

摘要

比达盆地和阿南布拉盆地是位于尼日利亚中部和南部的主要内陆沉积盆地,可能具有油气潜力,但缺乏勘探数据。本研究旨在提供有关沉积盆地热机制的基础信息,这将极大地促进其油气勘探、投资机会和开采。对南部比达盆地、北部阿南布拉盆地和邻近基底复合地形的航空磁异常数据进行频谱分析,揭示了该地区的居里点深度(CPD)、地热梯度和热流。数据显示,在比达盆地南部,居里点深度在 19 至 30 千米之间,地热梯度在 23 至 44 °C/千米以上,热流值在 50 至 109 mW/m2 之间。在阿南布拉盆地北部,CPD 值在 6.8 至 20 千米之间,热流值在 59 mWm2 至 109 mWm2 之间,盆地中部的局部浅层 CPD 值小于 6.8 千米,相关热流值高达 109 mWm2。据解释,比达盆地和阿南布拉盆地的热模式与侵入体和深层裂谷的存在有关。对航磁数据的解释与研究地区遥感数据获得的地表温度十分吻合。比达盆地南部和阿南布拉盆地北部的热模式分布对盆地的地热、源岩成熟和碳氢化合物生成评估具有影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Evaluation of the Thermal Regime of the Southern Bida and Northern Anambra Basins, Nigeria: Insights from Aeromagnetic and Remote Sensing Data

The Bida and Anambra Basins are major inland sedimentary basins located in the central and southern part of Nigeria with possible hydrocarbon potential but lack exploratory data. The present study aims at providing base line information on the thermal regime of the sedimentary basins, which would significantly contribute to its hydrocarbon prospect, investment opportunity and exploitation. The spectral analysis of the aeromagnetic anomaly data from the southern Bida Basin, northern Anambra Basin and adjacent basement complex terrain reveals the Curie point depth (CPD), geothermal gradient and heat flow in the region. The data reveals a CPD that varies between 19 and 30 km while the geothermal gradient is from 23 to more than 44 °C/km with heat flow values ranging from 50 to 109 mW/m2 in the southern Bida Basin. In the northern Anambra Basin, the CPD values range from 6.8 to 20 km and the heat flow values vary between 59 mWm2 and 109 mWm2, with a localized shallow CPD value of less than 6.8 km and associated high heat flow of 109 mWm2 in the central part of the basin. The delineated thermal patterns in the Bida and Anambra Basins are interpreted to be associated with the intrusions and the presence of deep-seated rift. The interpretation of the aeromagnetic data shows good agreement with the land surface temperature obtained from remote sensing data of the study area. The distribution of heat patterns in the southern Bida and northern Anambra Basins have implications for geothermal, source rock maturation and hydrocarbon generation evaluation of the basins.

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来源期刊
pure and applied geophysics
pure and applied geophysics 地学-地球化学与地球物理
CiteScore
4.20
自引率
5.00%
发文量
240
审稿时长
9.8 months
期刊介绍: pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.
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