scholarly journals Microbial diversity in petroleum reservoirs

2008 ◽  
Vol 29 (1) ◽  
pp. 25 ◽  
Author(s):  
Dongmei Li ◽  
Philip Hendry
Keyword(s):  
Microbial Diversity ◽  
Enhanced Oil Recovery ◽  
High Temperatures ◽  
Oil Recovery ◽  
Petroleum Reservoirs ◽  
The Earth ◽  
Petroleum Resources ◽  
Deep Underground ◽  
Hydrocarbon Deposits ◽  
Microbially Enhanced Oil Recovery

Buried hydrocarbon deposits, such as liquid petroleum, represent an abundant source of reduced carbon for microbes. It is not surprising therefore that many organisms have adapted to an oily, anaerobic life deep underground, often at high temperatures and pressures, and that those organisms have had, and in some cases continue to have, an effect on the quality and recovery of the earth?s diminishing petroleum resources. There are three key microbial processes of interest to petroleum producers: reservoir souring, hydrocarbon degradation and microbially enhanced oil recovery (MEOR).

scholarly journals CO$$_{2}$$ Convection in Hydrocarbon Under Flowing Conditions

2021 ◽  
Author(s):  
Trine S. Mykkeltvedt ◽  
Sarah E. Gasda ◽  
Tor Harald Sandve
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Flow Behavior ◽  
Cost Effective ◽  
Fine Grid ◽  
Cost Effective Method ◽  
Gravity Effects ◽  
Petroleum Resources ◽  
Nearby Point ◽  
Diffusive Processes

AbstractCarbon-neutral oil production is one way to improve the sustainability of petroleum resources. The emissions from produced hydrocarbons can be offset by injecting capture CO$$_{2}$$ 2 from a nearby point source into a saline aquifer for storage or a producing oil reservoir. The latter is referred to as enhanced oil recovery (EOR) and would enhance the economic viability of CO$$_{2}$$ 2 sequestration. The injected CO$$_{2}$$ 2 will interact with the oil and cause it to flow more freely within the reservoir. Consequently, the overall recovery of oil from the reservoir will increase. This enhanced oil recovery (EOR) technique is perceived as the most cost-effective method for disposing captured CO$$_{2}$$ 2 emissions and has been performed for many decades with the focus on oil recovery. The interaction between existing oil and injected CO$$_{2}$$ 2 needs to be fully understood to effectively manage CO$$_{2}$$ 2 migration and storage efficiency. When CO$$_{2}$$ 2 and oil mix in a fully miscible setting, the density can change non-linearly and cause density instabilities. These instabilities involve complex convective-diffusive processes, which are hard to model and simulate. The interactions occur at the sub-centimeter scale, and it is important to understand its implications for the field scale migration of CO$$_{2}$$ 2 and oil. In this work, we simulate gravity effects, namely gravity override and convective mixing, during miscible displacement of CO$$_{2}$$ 2 and oil. The flow behavior due to the competition between viscous and gravity effects is complex, and can only be accurately simulated with a very fine grid. We demonstrate that convection occurs rapidly, and has a strong effect on breakthrough of CO$$_{2}$$ 2 at the outlet. This work for the first time quantifies these effects for a simple system under realistic conditions.

Microbially enhanced oil recovery from unconsolidated limestone cores

1992 ◽  
Vol 10 (2) ◽  
pp. 77-86 ◽  
Author(s):  
Jon P. Adkins ◽  
Ralph S. Tanner ◽  
Emmanuel O. Udegbunam ◽  
Michael J. Mcinerney ◽  
Roy M. Knapp
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Microbially Enhanced Oil Recovery

Microbially Enhanced Oil Recovery: Past, Present, and Future

2014 ◽  
pp. 215-237 ◽  
Author(s):  
Michael J. McInerney ◽  
David P. Nagle ◽  
Roy M. Knapp
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Microbially Enhanced Oil Recovery

Enhanced Oil-recovery and Its Environmental and Economic Implications in the United States

1981 ◽  
Vol 8 (1) ◽  
pp. 5-18 ◽  
Author(s):  
Douglas Argyle Campbell
Keyword(s):  
United States ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil Production ◽  
The United States ◽  
Chemical Processes ◽  
Environmental Research ◽  
Thermal Processes ◽  
Microbiological Processes ◽  
The Earth

This survey has described the foreseeable environmental and economic impacts of enhanced oil-recovery (EOR) on U.S. oil production between 1980 and 2000. It has indicated that EOR production may be expected to rise from the approximately 4% of total U.S. oil production in 1980, to the projected approximations of 10.5% in 1985, 18.5% in 1990, 23% in 1995, and perhaps 30% in 2000. These percentages are substantial, particularly as this form of oil production has been, up until recently, quite limited. Many of the processes are still in the laboratory stage of development—particularly chemical and microbiological processes. With continued laboratory experimentation and field research, it is possible that the percentages could be even greater than the above suggestions as we reach into the 21st Century.The potential for EOR is very considerable and probably great, as it could involve some two-thirds of all the oil already identified in the United States and assumed to be unrecoverable by primary or secondary means. The U.S. Department of Energy (DOE) has given important incentives to the EOR industry to make such increased production worth while through raising prices to compensate for the cost of equipment, and deducting expenditure on such equipment from a new ‘Windfall Profit Tax’.Along with EOR's economic potential, there are two major ecological dangers: air pollution through thermal processes, and ground-water pollution through chemical processes. It is essential to the well-being of the United States that clean air standards be adhered to, and that the equipment necessary to purify the air (particularly in California) be available and operate to reduce emissions.A great deal more research needs to be undertaken towards developing safeguards to ensure that drinkingwater is not contaminated by dangerous chemicals which may be used in ‘chemical flooding’ of depleted oil-wells. Many of these chemicals have merely ‘come out of the laboratory’ and are sold by chemical companies without sufficient field-testing. How far these chemicals could travel underground must still be determined. It is also important to ensure that carbon dioxide, fed into a geological formation, can be recaptured and re-injected without escaping into the atmosphere, where there is the potential danger of a global ‘greenhouse effect’ upon the world's temperature. Finally, it is important to safeguard the Earth against microbes which could be injected into its geological strata without sufficient knowledge of their impact on the ecology of the Earth. Thus, much environmental research will be called for with these new methods of producing oil for Man's use.This study has reviewed the four major methods of EOR that are currently being utilized or proposed— thermal processes, miscible and semi-miscible processes, chemical processes, and microbiological processes, and found that they could all have ongoing possibilities.Given appropriate environmental safeguards, EOR should become a major force in the production of energy for the United States over the next 20 years, and it seems reasonable to expect that much the same could apply to other parts of the world. However, it is important that safeguarding the environment should guide the DOE in terms of its incentive programmes for specific processes.

scholarly journals Characterisation of Indigenous Oil Field Microorganisms for Microbially Enhanced Oil Recovery (MEOR)

2014 ◽  
Vol 86 (9) ◽  
pp. 1485-1485
Author(s):  
M. Krüger ◽  
J. Sitte ◽  
E. Biegel ◽  
H. Alkan ◽  
A. Herold
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil Field ◽  
Microbially Enhanced Oil Recovery

Mechanisms Involved in Microbially Enhanced Oil Recovery

2011 ◽  
Vol 91 (1) ◽  
pp. 59-79 ◽  
Author(s):  
Krista M. Kaster ◽  
Aksel Hiorth ◽  
Grethe Kjeilen-Eilertsen ◽  
Kate Boccadoro ◽  
Arild Lohne ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Microbially Enhanced Oil Recovery
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