Phillips Petroleum Company

J Bennett Clark

Gary E Jenneman

Diane Gevertz

Willis A Wood

Mary E Davey

Scott T Kellogg

The use of a dextrin as the carbon source for achieving a complete nutrient medium capable of sustaining microbial activity in subterranean formations is disclosed.

Injection of dextrins for subterranean microbial processes

The present invention provides a process for sustaining microbial activity in subterranean formations which comprises introducing as a microbial nutrient, an organic phosphate, This process may include the sequential injection of sources of individual nutrient components which are deficient in said subterranean formation, whereby the injected phosphorus source is an organic phosphate.

Injection of organic phosphates for subterranean microbial processes

A novel process for sustaining microbial activity in subterranean formations which comprises introducing as a microbial nutrient, a scale inhibitor. This process may include the sequential injection of sources of individual nutrient components which are deficient in said subterranean formation, whereby the injected phosphorus source is selected from the group consisting of an organic phosphate and an organic phosphonate.

Injection of scale inhibitors for subterranean microbial processes

A novel process for sustaining microbial activity in subterranean formations which comprises introducing as a microbial nutrient, a phosphite salt. This process may include the sequential injection of sources of individual nutrient components which are deficient in said subterranean formation, whereby the injected phosphorus source is selected from the group consisting of a phosphite salt and a phosphorous acid.

Utilization of phosphite salts as nutrients for subterranean microbial

An enhanced oil recovery process comprising injecting into an oil-bearing formation a sacrificial agent to adsorb on and occupy active sites of the formation matrix and introducing into the formation microbial cells or agents which produce metabolic products in-situ thereby enhancing oil displacement from the formation.

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Bartlesville, OK, United States of America

J Bennett Clark