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海上稠油注气过程中油气相互作用机理的实验研究

Experimental Study on Oil-Gas Interaction Mechanism during Offshore Heavy Oil Gas Injection.

作者信息

Zhang Lu, He Yifan, Zhang Tongyao, Wang Yue, Hong Xin, Zheng Zuhao, Li Jinyi, Shui Leilei, He Wei

机构信息

Energy Technology & Services Limited Drilling &Production Branch, China National Offshore Oil Corporation, Tianjin 065201, China.

China National Offshore Oil Corporation Tianjin Branch, Tianjin 065201, China.

出版信息

ACS Omega. 2024 Jun 25;9(27):29700-29709. doi: 10.1021/acsomega.4c03261. eCollection 2024 Jul 9.

DOI:10.1021/acsomega.4c03261
PMID:39005771
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11238319/
Abstract

Offshore heavy oil injection gas extraction is a highly scrutinized area in today's petroleum industry. However, the interaction mechanisms between oil and gas are not clear. To elucidate these mechanisms, an indoor experimental setup was established for research purposes. The effects of different types of gases on heavy oil expansion, mass transfer mechanisms between gas and heavy oil, the influence of gas injection on heavy oil phase behavior, and the testing of minimum miscibility pressures are investigated in this study. The results indicate that CO yields the best reduction in the heavy oil viscosity. Both forward and backward multiple contact mass transfer processes demonstrate nonmiscible multiple contact dynamic displacement mechanisms involving CO dissolution and condensation, as well as C1 extraction and coextraction. Nonmiscible multiple contact dynamic displacement of natural gas primarily involves limited dissolution and condensation of light hydrocarbon components and intermediate hydrocarbon components, with an extremely weak extraction effect. The minimum miscibility pressures are in the order of CO < natural gas < N. This research provides important experimental evidence and theoretical guidance for further improving offshore heavy oil injection gas technology and practice.

摘要

海上稠油注气开采是当今石油工业中备受关注的领域。然而，油气之间的相互作用机制尚不清楚。为了阐明这些机制，建立了室内实验装置用于研究目的。本研究考察了不同类型气体对稠油膨胀的影响、气-稠油之间的传质机制、注气对稠油相行为的影响以及最小混相压力的测试。结果表明，CO使稠油粘度降低效果最佳。正向和反向多次接触传质过程均表现出非混相多次接触动态驱替机制，涉及CO的溶解和冷凝以及C1的萃取和共萃取。天然气的非混相多次接触动态驱替主要涉及轻烃组分和中间烃组分的有限溶解和冷凝，萃取效果极弱。最小混相压力顺序为CO<天然气<N。该研究为进一步改进海上稠油注气技术及实践提供了重要的实验依据和理论指导。

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