Sustainable agents for enhanced oil recovery and drilling additives derived from microbial biomass

Patent metadata

Field	Value
Publication number	US-11739253-B2
Application number	US-202017012597-A
Country	US
Kind code	B2
Filing date	Sep 4, 2020
Priority date	Sep 6, 2019
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

Proteinaceous enhanced oil recovery operates on the principle that proteins can be denatured using chemicals to break them down into a viscous polymeric mixture that exhibits an EOR effect. In one or more embodiments, the proteins in question are sourced from an algae ( spirulina ) meal, which could be obtained as a waste product from wastewater treatment or bioprocessing operations, including biofuel production where the lipids are extracted for fuel but the large volumes of proteins are considered a waste material with little or negative value. In other embodiments, other biomasses are used, especially edible biomasses, thereby mitigating public resistance to drilling operations due to concerns of perceived toxicity of chemicals. This also mitigates legal liability from the use of chemicals that are known to be toxic. Additionally, the agents are denatured biomasses that have not undergone expensive purification or separation steps. This will make these agents highly cost competitive. And, because there is no separation or purification, there are no wastes or byproducts from the synthesis to be disposed of. This also reduces costs compared to competitors.

First claim

The invention claimed is:

1. A composition of matter for enhanced oil recovery comprising:
a denatured Spirulina plantesis protein, wherein the denatured Spirulina plantesis protein is denatured with a denaturant selected from a group consisting of: sodium hydroxide and urea;
and wherein the composition has an at least 50 dry wt % of the denatured Spirulina plantesis protein.

2. The composition of claim 1 , wherein the denaturant is sodium hydroxide.

3. The composition of claim 1 , wherein the denaturant is urea.

4. The composition of claim 1 , wherein the composition has a fluid density of ten pounds per gallon.

5. The composition of claim 1 , wherein the denaturant is sodium hydroxide, and wherein the composition has a mean contact angle of 40.51°.

Assignees

• Univ Louisiana At Lafayette

Inventors

• Chirdon William
• Schexnayder Peter
• Thibodeaux Garrett
• Baudoin Nicholas

Classifications

• C09K8/58 Primary

  Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids · CPC title

• C09K8/035

  Organic additives · CPC title

• C09K2208/28

  Friction or drag reducing additives · CPC title

• C09K2208/34

  Lubricant additives · CPC title