油藏模拟

工作流程支持对枯竭气藏中的二氧化碳封存进行热动态模拟

本文为枯竭气田碳捕获与储存项目的热建模提供了指导。

图 1——整体工作流程。
图 1——整体工作流程。
来源:SPE 222417。

以阿联酋Sajaa气田为例,作者设计了多个工作流程,以建立枯竭气田二氧化碳封存的完全热动态模拟方案。本研究建立了几个新颖的工作流程,包括设置注入的二氧化碳和杂质的溶解表、列出各组分的焓值,以及计算储层和盖层的热容量和导热系数。本文为枯竭气田捕获与封存项目的热建模提供了指导。

介绍

Sajaa 和 Kahaif 凝析气田位于阿曼山脉错综复杂的褶皱/冲断带内,是重要的油气储层,以塔玛玛群的白垩纪碳酸盐岩地层为特征。这两个气田都拥有丰富的天然气和凝析油气资源。

Sajaa 油田上覆盖着一层厚厚的 Nahr Umr 地层,该地层作为一个可靠且有效的封盖层,在地质时间尺度上有效地容纳了大量的碳氢化合物。

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Reservoir simulation

Workflow Enables Thermal Dynamic Simulation of CO₂ Storage in Depleted Gas Reservoirs

This paper provides guidelines for thermal modeling for carbon capture and storage projects in a depleted gas field.

Fig. 1—Overall workflow.
Fig. 1—Overall workflow.
Source: SPE 222417.

Using a case study from the Sajaa Field in the UAE, the authors devised several workflows to establish a fully thermal dynamic simulation case for CO2 storage in a depleted gas reservoir. Several novel workflows were established during this study, including setting up dissolution tables for CO2 and impurities being injected, tabulating the enthalpy of each component, and computing reservoir and caprock formations’ thermal capacity and conductivity. The paper provides guidelines for thermal modeling for carbon capture and storage projects in a depleted gas field.

Introduction

Situated within the intricate fold/thrust belt of the Oman Mountains, the Sajaa and Kahaif gas-condensate fields are prominent hydrocarbon reservoirs characterized by the Cretaceous carbonate formations of the Thamama Group. Both fields are prolific gas and condensate hydrocarbon producers.

The Sajaa field is overlain by a thick sequence of the Nahr Umr formation, which serves as a competent and reliable seal effectively containing substantial volumes of hydrocarbons over geological timescales.

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