Research for reducing the Minimum Miscible Pressure of crude oil and carbon dioxide by injecting citric acid isobutyl ester

IF 1.8 4区工程技术 Q4 ENERGY & FUELS

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles Pub Date : 2021-01-01 DOI:10.2516/OGST/2021007

Guangjuan Fan, Yuejun Zhao, Yilin Li, Xiaodan Zhang, Hao Chen

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引用次数: 5

Abstract

Carbon dioxide miscible flooding has become one of the important technologies for improving oil recovery. The Minimum Miscible Pressure (MMP) is the key parameter to realize miscible flooding. As the MMP in the research area is higher than the formation fracture pressure, miscible flooding cannot be formed. To address this problem, it is necessary to find a way to reduce the MMP. Citric acid isobutyl ester is chosen to reduce the MMP of carbon dioxide and crude oil in this research. The effect of citric acid isobutyl ester on reducing the MMP was measured by the method of long-slim-tube displacement experiment. The experiment results show that the MMP is 29.6 MPa and can be obviously reduced by injecting the slug of citric acid isobutyl ester. The MMP could decrease gradually with constantly adding the injected slug of citric acid isobutyl ester, but the decrease becomes smaller and smaller. The optimum injected slug size of the chemical reagent is 0.003 PV. Under the condition of the slug size, the MMP is reduced to 23.5 MPa and the reduction is 6.1 MPa.

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注入柠檬酸异丁基酯降低原油与二氧化碳最低混相压力的研究

二氧化碳混相驱已成为提高采收率的重要技术之一。最小混相压力(MMP)是实现混相驱的关键参数。由于研究区MMP高于地层破裂压力，无法形成混相驱。为了解决这个问题，有必要找到一种减少MMP的方法。本研究选择柠檬酸异丁基酯来降低二氧化碳和原油的MMP。采用长细管置换法测定了柠檬酸异丁基酯对MMP的还原作用。实验结果表明，注入柠檬酸异丁基酯段塞可以明显降低MMP为29.6 MPa。随着注入柠檬酸异丁基酯段塞的不断加入，MMP可以逐渐降低，但降低幅度越来越小。化学试剂的最佳注入段塞尺寸为0.003 PV。在段塞尺寸相同的条件下，MMP减小至23.5 MPa，减小幅度为6.1 MPa。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 工程技术-工程：化工

CiteScore

2.70

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： OGST - Revue d''IFP Energies nouvelles is a journal concerning all disciplines and fields relevant to exploration, production, refining, petrochemicals, and the use and economics of petroleum, natural gas, and other sources of energy, in particular alternative energies with in view of the energy transition. OGST - Revue d''IFP Energies nouvelles has an Editorial Committee made up of 15 leading European personalities from universities and from industry, and is indexed in the major international bibliographical databases. The journal publishes review articles, in English or in French, and topical issues, giving an overview of the contributions of complementary disciplines in tackling contemporary problems. Each article includes a detailed abstract in English. However, a French translation of the summaries can be provided to readers on request. Summaries of all papers published in the revue from 1974 can be consulted on this site. Over 1 000 papers that have been published since 1997 are freely available in full text form (as pdf files). Currently, over 10 000 downloads are recorded per month. Researchers in the above fields are invited to submit an article. Rigorous selection of the articles is ensured by a review process that involves IFPEN and external experts as well as the members of the editorial committee. It is preferable to submit the articles in English, either as independent papers or in association with one of the upcoming topical issues.