Microscopic oil displacement mechanism of indigenous microorganisms under high-temperature and high-pressure conditions in reservoirs

被引：0

作者：

Zhu, Weiyao ^{[1
]}

Xia, Xiaoxue ^{[1
]}

Guo, Shengxue ^{[2
]}

Li, Juan ^{[1
]}

Song, Zhiyong ^{[1
]}

Qu, Guohui ^{[3
]}

机构：

[1] Civil and Environmental Engineering School, University of Science and Technology Beijing

[2] Oil Production Technology Research Institute, Sinopec Shengli Oilfield Company

[3] College of Petroleum Engineering, Northeast Petroleum University

来源：

Shiyou Xuebao/Acta Petrolei Sinica | 2014年 / 35卷 / 03期

关键词：

Enhance oil recovery; High temperature and high pressure; Indigenous microorganisms; Microscopic oil displacement mechanism; Porous media;

D O I：

10.7623/syxb201403015

中图分类号：

学科分类号：

摘要：

To study the microscopic oil displacement mechanism of indigenous microorganisms, simulation of oil displacement by indigenous microbes and their metabolites obtained from oilfield is carried out under high temperature and high pressure reservoir conditions (60°C, 10 MPa). The distribution and flow of remaining oil in process of oil displacement by water flooding and microorganisms is observed and analyzed using a microscopic simulation photoetching visual model. Further, the oil displacement efficiency is quantitatively investigated by applying testing and image processing techniques. The results show that indigenous microorganisms have certain activity under high temperature and high pressure, and better oil displacement efficiency. Activation of microorganisms is conducive to effectively exploring all kinds of remaining oil; displacement of remaining oil is achieved through combined action of microorganisms and their metabolites on blind hole, instead of water flooding. Thus, the flow ability of crude oil and oil recovery are enhanced respectively. The mechanism of oil displacement by microorganisms can be summarized as below: (1) Absorption and degradation of crude oil by microorganisms; (2) Dissolution of biogas generated by microorganisms in crude oil to reduce its viscosity; (3) Exfoliation and emulsification of remaining oil with biosurfactant produced by microorganisms to change the wettability on the surface of porous media.

引用

页码：528 / 535

页数：7

共 30 条

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