Microbially enhanced oil recovery from carbonate reservoirs
作者:
RalphS. Tanner,
EmmanuelO. Udegbunam,
MichaelJ. McInerney,
RoyM. Knapp,
期刊:
Geomicrobiology Journal
(Taylor Available online 1991)
卷期:
Volume 9,
issue 4
页码: 169-195
ISSN:0149-0451
年代: 1991
DOI:10.1080/01490459109385998
出版商: Taylor & Francis Group
关键词: Dolomite;field trials;limestone;microbial ecology;microbially enhanced oil recovery;petroleum
数据来源: Taylor
摘要:
About half of the world's oil production is from carbonate formations. However, most of the research in microbially enhanced oil recovery (MEOR), a potentially important tertiary recovery technology, has focused on sandstone reservoirs because, in general, they are geologically simpler than carbonate reservoirs and easier to model in the laboratory. Carbonate formations have a wide range of pore geometries and distributions, resulting in complex flow dynamics. The low matrix permeabilities and the dual porosity characteristics of most carbonate formations, coupled with the chemistry of carbonates, have slowed implementation of enhanced oil recovery methods. A review of the data on carbonate reservoirs in Dwight's Energydata TOTL System indicated that 40% of the oil‐producing carbonate reservoirs surveyed in the United States have environmental, geological, and petrophysical conditions that would make them candidates for MEOR. A review of a number of MEOR field trials showed that rates of oil production could be increased by as much as 200%. Microbial activity in these trials was probably due to that of indigenous populations rather than the microorganisms injected for the trials. Detrimental effects such as loss of injectivity and increased souring were not reported. Based on analysis of the geology and petrophysical characteristics of carbonates, two common mechanisms of MEOR, microbial acid production and microbial gas production, are especially suited for application in carbonate reservoirs.
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