巴西桑托斯盆地的当前地热场,巴西
Guoping Zuo1, Hongping Wang2, Lei Lan3
1PetroChina Hangzhou Research Institute of Geology, Hangzhou, 310023, China.
Scientific reports
|July 31, 2023
概括
这项研究表明,巴西桑托斯盆地的盐岩沉降低了盐前温度,影响了碳化合物源岩的成熟度. 这些发现对于评估该地区丰富的深水石油和天然气资源至关重要.
科学领域:
- 地质物理学 地质物理学
- 石油地质科学 石油地质科学
- 盆地分析 盆地分析
背景情况:
- 桑托斯盆地拥有大量的深水石油资源,但其地热田仍未得到充分研究.
- 有限的地热数据阻碍了在这个被动大陆边缘盆地全面评估石油和天然气资源.
研究的目的:
- 为了研究桑托斯盆地当前的地热场.
- 量化评估盐岩沉积对地热梯度,热流和碳化合物源岩成熟度的影响.
主要方法:
- 利用了来自16个后盐和31个前盐井的温度数据.
- 计算的盐后和盐前地热梯度和陆地热流.
- 使用的BasinMod 1D软件用于盆地模拟和冲击分析.
主要成果:
- 盐后的地热梯度:2.20-3.97°C/100米 (平均水平) 2.99 °C/100m);热量流: 54.00-97.32 mW/m2 (平均值) 的热量流 73.36 mW/m2) 的电源.
- 盐前的地热梯度:2.21-2.95°C/100米 (平均水平) 2.53°C/100m);热量流量:61.85-82.59mW/m2 (平均值) 在一个单位. 70.69 mW/m2) 的电源.
- 盐岩沉积降低了盐前温度,抑制了碳化合物源岩的成熟度高达1.32%,阻碍随着盐的厚度而降低.
结论:
- 桑托斯盆地表现出一个稳定的结构区域的特征低温地热场.
- 盐岩的分布和厚度显著影响地热场和陆地热流.
- 了解这些地热动态对于优化桑托斯盆地石油和天然气勘探至关重要.
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