利用 PVTi 软件和实验室数据进行成分分级和储层石油成分随深度变化的实验

Dr. Mehrdad Alemi, Hossein Jalalifar
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引用次数: 0

摘要

较重的分子倾向于向柱底移动。PVT 实验的基本假设是系统处于重力平衡和扩散平衡状态。从油品开始,沿着油柱向上移动,流体会变轻并趋向于气体(凝析油)。有两种可能的分级。第一种是流体从油层变为气层,并在某个特定深度出现明显的气油接触。如果出现这种情况,将对其进行预测。第二种是流体从油到气的分级,没有接触。这种情况下,储层内成分的临界温度等于储层温度。根据成分分级研究,储层石油成分的 API 和某些属性(如硫含量和二氧化碳含量)随储层深度而变化。大多数情况下,气-油接触点(GOC)被命名为储层基准深度。本文利用 PVTi 软件和实验室数据,对成分分级和储层石油成分随深度变化的实验进行了研究,并得出了一些很好的结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Compositional Grading and Reservoir Oil Composition Variation with Depth Experiment by PVTi Software with Lab Data
Heavier molecules tend to migrate towards the bottom of column. Gross assumptions in PVT experiment are that the system is in gravitational and diffusive equilibrium. Starting from an oil and moving up a column, the fluid will become lighter and tend towards a gas (condensate). Two types of grading are possible. The first one is of the fluid going from an oil to a gas with a distinct gas-oil contact at some unique depth. If this situation occurs, it will be predicted. The second one is the Fluid grading from an oil to a gas without a contact. This case corresponds to the critical temperature of a composition within the reservoir equalling the reservoir temperature. In compliance with compositional grading study, the API and some properties of the reservoir oil composition such as sulphur and CO2 contents vary with the reservoir depth. Most of the time the gas-oil contact (GOC) is named as the reservoir datum depth. In this paper, the study of compositional grading and reservoir oil composition variation with depth experiment by PVTi software with lab data has been achieved and some good conclusions have been gained.
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