能源转型

研究探讨氢气/天然气混合物在地下气体储存库中的储存

本研究的目的是通过数值方法研究在含水层相关的地下储气库中储存 H2/天然气 (CH4) 混合物时的系统行为，以及气体成分和盐度对能量回收效率的影响。

图 1——基于伊利诺伊州曼洛夫油田的 3D 模拟域和计算网格示意图。
图 1——基于伊利诺伊州曼洛夫油田的 3D 模拟域和计算网格示意图。
来源：SPE 225606。

本研究旨在通过数值模拟方法，探究氢气或天然气（甲烷）混合物（HNM）在含水层地下储气库（UGS）中的系统行为，以及气体成分和盐度对能量回收效率的影响。研究结果可为含水层地下储气库中HNM的注入、生产和整体行为相关的工程决策提供有价值的参考。

介绍

储存高密度天然气需要仔细考虑储层性质、气体行为和操作可行性。氢气比甲烷轻且浮力更大，这可能导致储层内气体分层。此外，氢气的低密度会影响储层压力和气体膨胀速率，因此与以甲烷为主的储层相比，需要更优化的储存策略。

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原文链接/JPT
Energy transition

Study Explores Storage of Hydrogen/Natural Gas Mixtures in Underground Gas Repositories

The objective of this study is to numerically investigate system behavior when storing H2/natural gas (CH4) mixtures in aquifer-related underground gas storage, and the effect of gas composition and salinity on energy-recovery efficiency.

Fig. 1—Schematic of 3D simulation domain and computational mesh based on Manlove field in Illinois.
Fig. 1—Schematic of 3D simulation domain and computational mesh based on Manlove field in Illinois.
Source: SPE 225606.

The objective of this study is to numerically investigate system behavior of H2 or natural-gas (CH4) mixtures (HNM) in aquifer-related underground gas storage (UGS), and the effect of the gas composition and salinity on energy-recovery efficiency. The findings provide valuable insights into engineering decisions associated with the injection, production, and overall behavior of HNM in aquifer-based UGS facilities.

Introduction

Storing HNM requires careful considerations of reservoir properties, gas behavior, and operational feasibility. H2 is lighter and more buoyant than CH4, which can cause gas stratification within the reservoir. Furthermore, the low density of H2 affects reservoir pressure and gas-expansion rate, requiring greater optimization of storage strategies when compared with CH4-dominated storage.

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