Phillips Petroleum Company

Conocophillips Company

University Technologies International, Inc.

Uti Limited Partnership

Gary E Jenneman

J Bennett Clark

Diane Gevertz

Gerrit Voordouw

James B Clark

Anne Greene

Edward D Burger

Babajide Kolade

Willis A Wood

Scott T Kellogg

Mary E Davey

Bennett Clark

James Bennett Clark

A process is provided for the time dependent reduction and kill of cellular bacteria in a fluid by sequential exposure to nitrites and a low concentration of biocide. Oilfield water containing sulfate-reducing bacteria can be supplied with a timed sequential exposure of nitrite and biocide. The timed sequential addition of the biocide following exposure to the nitrite provides enhanced kill of the sulfate-reducing bacteria at concentrations of biocide that are lower than would be possible using simultaneous addition of these materials.

Enhanced kill of microorganisms

A method for modeling reservoir souring using object-oriented numerical solutions separate from reservoir topography is described. Specifically, flow physics are separated into one or more objects, along with one or more HS generation mechanisms, for modeling on time and spatial scales separate from field scale modeling.

Reservoir souring forecasting

Biogenic sulfide production is synergistically inhibited by treating sulfate-reducing bacteria (SRB) with a biocide and a metabolic inhibitor. The biocide directly kills a first portion of the SRB. The metabolic inhibitor inhibits sulfate-reducing growth of a second portion of the SRB without directly killing the second portion of the SRB. The treatment of SRB with both a biocide and a metabolic inhibitor provides effective biogenic sulfide inhibition at significantly lower concentrations than would be required if the biocide or metabolic inhibitor was used alone.

Inhibition of biogenic sulfide production via biocide and metabolic inhibitor combination

A composition and a process for substantially reducing or removing sulfide from a sulfide-containing fluid are disclosed. The composition comprises, or is prepared by combining components comprising, a sulfide-containing fluid and a sulfide-scavenging amount of a sulfide scavenger selected from the group consisting of bromates, iodates, and combinations of two or more thereof. The process comprises contacting a sulfide-containing fluid with a sulfide-scavenging amount of a sulfide scavenger under a condition sufficient to substantially reduce the sulfide concentration in the fluid.

Reduction of sulfide in fluids

A bacterial culture which comprises a Campylobacter-like species is provided. The bacterial culture is capable of oxidizing a sulfide compound in a fluid such as, for example, a produced brine. Also provided is a process for substantially reducing sulfide content in a fluid wherein the process comprises contacting the fluid with a bacterial culture which comprises a Campylobacter-like species.

Process of using sulfide-oxidizing bacteria

Sulfide-oxidizing bacteria

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

A novel process for sustaining microbial activity in subterranean formations which comprises introducing in addition to microbial nutrients, a sequestering anion. 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 more readily transportable due to the presence of a sequestering agent in the formation.

Injection of sequestering agents 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

The present invention provides a process for injecting microbial nutrients into a subterranean formation wherein microorganism are provided a phosphorus nutrient source, and said phosphorus nutrient source into said formation under acid conditions.

Injection of phosphorus nutrient sources under acid conditions for

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

The present invention provides a method of injecting nutrients into a subterranean formation in order to achieve a desired in-situ microbial objective. Sources of individual nutrient components which are deficient in the formation are sequentially injected so that a complete nutrient medium capable of sustaining substantial microbial activity is formed in the formation upon injection of the last of said sources. Said sources are preferably injected into the formation in order of decreasing quantitative formation retainability.

Growing community of inventors

Bartlesville, OK, United States of America

Gary E Jenneman