挥发性轻碳化合物作为石油和天然气田的热和变化指标
1Saudi Aramco, 31311, Dhahran, Saudi Arabia. khaled.arouri@aramco.com.
Scientific reports
|June 3, 2024
概括
新的配方使用挥发性轻碳化合物组成来确定石油流体的热成熟度. 这些计算有助于了解地下条件,并优化石油勘探和工程.
科学领域:
- 地质化学 地质化学
- 石油工程是石油工程中的一个.
- 有机地化学 有机地化学
背景情况:
- 挥发性轻碳化合物 (VLH) 是石油流体的关键组成部分,影响勘探和工程.
- VLH的组成对热应力和地质变化的敏感,为地下条件提供了见解.
- 了解VLH的起源和命运对于流体类型,映射和经济估值至关重要.
研究的目的:
- 开发使用VLH组合计算热成熟度的新方法.
- 调查VLH地质化学与水库工程特性之间的关系.
- 将这些方法应用于各种石油流体,从重油到干气.
主要方法:
- 从阿拉伯半岛的石油和天然气田中分析挥发性轻碳化合物 (VLH).
- 在现场流体组成数据 (PVT) 与分子和稳定碳同位素地质化学的整合.
- 推导与热成熟度 (%VRe) 相关联的VLH组成 (斜率因子,同位素比率) 的公式.
主要成果:
- 从VLH组成中推导出三个公式来计算热成熟度 (%VRe):%VRe(SF) = 0.38 SF + 0.41,%VRe(i4) = 1.70 (iC4/nC4) + 0.61,以及%VRe(i5) = 0.89 (iC5/nC5) + 0.56.
- 斜率因子,iC4/nC4和iC5/nC5比率随着不变流体的热演变而单调地增加.
- 对变化的流体 (相分离,生物降解,裂,TSR) 的校正允许准确的热成熟度评估.
结论:
- VLH组成提供了一种可靠的方法来量化储流体的热成熟度.
- 衍生的公式适用于广泛的流体类型和地质条件.
- 这些新工具提高了对石油系统的理解,并有助于勘探和工程决策.
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