精确的流体表征在源岩评估中的作用:从阿拉伯中上罗纪碳酸盐源岩的洞察
Ali Al-Eid1, Israa S Abu-Mahfouz1, Bandar I Ghassal2
1Department of Geosciences, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia.
ACS omega
|March 24, 2025
概括
石油源岩中的自由碳化合物和青会影响热解结果. 消除这些污染物可以更准确地测量热成熟度和有机丰富度,从而改善资源估计.
科学领域:
- 地质化学 地质化学
- 石油地质学 石油地质学
- 有机地化学 有机地化学
背景情况:
- 石油来源岩石分析,包括煤化物分布和热成熟度,由于和自由碳化合物等污染物,面临不确定性.
- 这些污染物可能会不准确地影响热解结果和总有机碳 (TOC) 测量,影响碳化合物潜力的评估.
研究的目的:
- 调查自由碳化合物和对源岩热成熟度和产能潜力的评估的影响.
- 通过去除干扰的流体组件来完善热解数据,并获得更准确的地下表征.
主要方法:
- 在罗纪碳酸盐来源岩石样本上进行了岩石时代热解.
- 使用化学溶剂提取,从样本子集中去除剩余的碳化合物.
- 热解数据 (S1,S2,TOC,Tmax) 在提取前后进行了比较.
主要成果:
- 溶剂提取显著降低了S1,S2和TOC值,表明存在干扰碳化合物.
- 提取后的S1从2.4降至0.5毫克/g岩石,S2从3.3降至1.9毫克/g岩石,TOC从8.1降至7.2重%.
- 在Tmax值略有增加 (大约. 4°C) 在提取后被观察到,这表明了更准确的热成熟度指示.
结论:
- 移除自由碳化合物和石导致更可靠的来源岩石热成熟度和丰度数据.
- 精确的表征增强了水库有机丰富性和流体性质的识别.
- 这种方法减少了资源估计中的不确定性,并允许量身定制的体积计算.
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