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Geochemical modeling with the use of vertical and horizontal relative concentrations of oil compounds for the heavy oil fields

机译：用垂直和水平相对浓度的油化合物对重油田的垂直和水平相对浓度的地球化学建模

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The purpose of this study is to detect lateral and vertical gradients of relative concentrations of compounds presented in oil, which allows assessing potential drainage zones in the reservoir during the reservoir production by steam injection. In this research new method for monitoring of steam chamber development in 2D model was created and tested. Methodology: Total hydrocarbon fraction was isolated from core extracts and analyzed by GCMS method (TIC) for detection of various compounds and assessment of lateral and vertical gradients of their concentration in lateral. It was found that the ratio of 4- and 1-methyldibenzothiophenes (MDBT) changes in lateral and in vertical directions. These changes are caused by biodegradation of organic matter. Laboratory research shows that 1-MDBT/4-MDBT ratio in native reservoir rocks is stable under high temperatures and pressure and can be easily measured by GC-MS. This measurement will allow assessment of location and direction of steam chamber propagation. In recent work the authors have developed geochemical model which can be used for assessment of oil flow directions during the development of heavy oil fields by SAGD method.
机译：本研究的目的是检测油中呈现的相对浓度的横向和垂直梯度，这允许通过蒸汽喷射在储层生产过程中评估储层中的潜在排水区。在这项研究中，创建和测试了新的2D模型中蒸汽室发育的新方法。方法论：从核心提取物中分离出总烃级分，并通过GCMS方法（TIC）分析，用于检测其在横向中浓度的各种化合物和横向和垂直梯度的评估。发现4-和1-甲基二苯甲酸苯酚（MDBT）的比例在横向和垂直方向上变化。这些变化是由有机物生物降解引起的。实验室研究表明，天然储层岩石中的1-MDBT / 4-MDBT比在高温和压力下稳定，可以通过GC-MS轻松测量。该测量将允许评估蒸汽室传播的位置和方向。在最近的工作中，作者开发了地球化学模型，可用于通过SAGD方法在重油场的开发过程中评估油流方向。

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