Klimenko Alexandra, Cui Leyu, Ding Lei, Bourrel Maurice
Pôle d'Etudes et de Recherches de Lacq, TotalEnergies S.E., BP 47, 64170 Lacq, France.
Physico-Chimie des Interfaces Complexes, Laboratoire Commun TotalEnergies/ESPCI, Bâtiment CHEMSTARTUP, RD 817, 64170 Lacq, France.
ACS Omega. 2024 Aug 20;9(35):37094-37104. doi: 10.1021/acsomega.4c04137. eCollection 2024 Sep 3.
CO injection in subterranean reservoirs for storage, oil recovery, or both is challenging because of its very high mobility. Using a CO foam or emulsion is a way to remedy this problem by increasing CO's apparent viscosity. However, the generation of the foam and its propagation in porous media present several issues that have to be overcome for this process to be economically realistic in practice. For example, it may take time, i.e., a number of pore volumes to be injected, before the foam is created. It is the objective of this Article to investigate these issues thoroughly and to identify the mechanisms underlying them by looking at the effects of various parameters. It is found that surfactant adsorption on the surface of the rock is an important factor involved in the delay of foam formation, but this may not explain all of the results. The nature and morphology of the porous medium may be, in some cases, the dominant factors for foam generation and propagation. From an understanding of the origin of the encountered problem, relevant mitigation strategies are envisioned and evaluated. It is found, for example, that when appropriately formulated and injected with the proper process, foam or emulsion generation is strongly accelerated, which very significantly shortens the delay for achieving CO storage.
由于二氧化碳（CO）具有很高的流动性，因此将其注入地下储层进行储存、采油或两者兼而有之具有挑战性。使用CO泡沫或乳液是通过增加CO的表观粘度来解决这一问题的一种方法。然而，泡沫的产生及其在多孔介质中的传播存在几个问题，要使这一过程在实际中具有经济可行性，就必须克服这些问题。例如，在产生泡沫之前可能需要时间，即注入一定数量的孔隙体积。本文的目的是彻底研究这些问题，并通过研究各种参数的影响来确定其潜在机制。研究发现，表面活性剂在岩石表面的吸附是泡沫形成延迟的一个重要因素，但这可能无法解释所有结果。在某些情况下，多孔介质的性质和形态可能是泡沫产生和传播的主导因素。从对所遇到问题的根源的理解出发，设想并评估了相关的缓解策略。例如，研究发现，当配方合适并采用适当的工艺注入时，泡沫或乳液的产生会大大加速，这将显著缩短实现CO储存的延迟时间。
