E.i. Dupont De Nemours and Company

Robert Donald Fallon

Mark Scott Payne

John Edward Gavagan

Robert DiCosimo

Robert Dicosimo

Scott Christopher Jackson

Frank Edward Herkes

Albert W Alsop

Sarita Chauhan

Daniel P O'Keefe

Thomas Foo

Joseph J Zaher

Anna Panova

F Glenn Gallagher

Xu Li

George C Fox

Jeffery Scott Thompson

Robert Di Cosimo

Michael G Bramucci

Mark J Nelson

Lech Wilczek

Arie Ben-Bassat

Michael P Perry

Edwin R Hendrickson

Sharon Jo Keeler

Leo Ernest Manzer

Abigail K Luckring

Barry Stieglitz

Linda L Hnatow

Joachim C Ritter

Sourav Kumar Sengupta

Hasan Dindi

Andrew C Eliot

David L Anton

Ekaterini Korovessi

Ernest Byron Wysong

Vincent G Witterholt

Jeffrey Scott Thompson

Eric R Choban

John Joseph Hagedorn

Scott Christopoher Jackson

Sheryl M Anyzek

David Alan Suchanec

Sheryl M Anzek

Controlling microbial growth and activity during Microbial Enhanced Oil Recovery processes is disclosed. Specific control of microbial growth and activity in this process results in prevention of nutrient loss in transit and allows better targeting of microbial activity to the desired subsurface location(s).

Controlling bioavailability of nutrient additions in subsurface formations

This invention provides a process of making a linear dicarboxylic acid of C, C, C, Cor Cchain length, the process comprising providing a feed which is a renewable resource, contacting the feed with a catalyst in the presence of hydrogen and at a temperature of about 250&#xb0; C. to about 425&#xb0; C. and at a pressure of about 500 psig to about 2500 psig (3450 kPa to about 17,250 kPa) to produce a hydrocarbon product having at least a 5:1 ratio of even-numbered alkanes to odd-numbered alkanes and comprising a linear alkane of Cchain length; and fermenting at least a portion of the linear alkane of Cchain length to a linear dicarboxylic acid of Cchain length, wherein n=10, 12, 14, 16 or 18. The catalyst comprises an oxide, molybdenum, and one or more active metals selected from the group consisting of nickel, cobalt, and mixtures thereof and the catalyst is in sulfided form.

Process for making linear dicarboxylic acids from renewable resources

Disclosed herein is introduction of different nutrient solution formulations to a subterranean target site to prevent biofilm formation and biomass aggregation at the sand face of an injection well bore during MEOR or bioremediation processes. A first nutrient solution formulation supports growth of introduced microorganisms and a second nutrient solution formulation is used to promote biofilm formation to allow plugging of pores and channels in the subterranean target site, for MEOR or bioremediation.

Prevention of biomass aggregation at injection wells

Methods and compositions are provided wherein microorganisms are used to alter the interface of hydrocarbons and hydrocarbon-coated surfaces to increase oil recovery, for improved bioremediation and/or pipeline maintenance.

Altering the interface of hydrocarbon-coated surfaces

Methods are provided for treating production fluid in an oil reservoir to reduce the amount of sulfide in the production fluid. The production fluid is treated with nitrate and/or nitrite ions in an aqueous solution that is added to an injection well that is in contact with the production well.

Reducing sulfide in oil reservoir production fluids

A method to improve the effectiveness of MEOR or bioremediation processes. In this method toxic chemicals accumulated in subterranean sites adjacent to the water injection wells are either dispersed or removed prior to introduction of microbial inocula for enhanced microbial oil recovery or bioremediation of these sites.

Method for pre-treatment of subterranean sites adjacent to water injection wells

The present disclosure relates to isolation and identification of uniquestrains that can grow on crude oil under denitrifying conditions and are useful in oil recovery.

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Growing community of inventors

Elkton, MD, United States of America

Robert Donald Fallon