SYSTEM AND PROCESS FOR GEOLOGICAL SEQUESTRATION OF CARBON-CONTAINING MATERIALS
This disclosure relates to methods and systems for injecting and/or sequestering carbon-containing materials in underground wells, and, in some examples, for using the carbon-containing materials for enhanced oil recovery and well abandonment. An example method includes: obtaining a mixture including biochar particles and a liquid; and providing the mixture for injection into an underground well.
1 . A method of sequestering carbon-containing materials, the method comprising:
obtaining a carbon-containing material comprising at least one of lignin pulp or a waste material from a paper mill; and
providing the material for injection into an underground well.
2 . The method of claim 1 , wherein the material comprises the lignin pulp.
3 . The method of claim 1 , wherein the material comprises the waste material from the paper mill.
4 . The method of claim 1 , wherein the material further comprises bio-oil.
5 . The method of claim 1 , wherein the material further comprises biochar.
6 . The method of claim 1 , wherein providing the material for injection comprises injecting the material into the underground well.
7 . The method of claim 1 , wherein the underground well comprises at least one of a commercial disposal well, a salt cavern, a Class II cavern, a depleted mine, an abandoned mine, a purpose-constructed mine, or a natural cavern.
8 . The method of claim 1 , further comprising subjecting the material to a test for compatibility with the underground well.
9 . The method of claim 8 , wherein the test for compatibility comprises using a core sample for the underground well.
10 . The method of claim 1 , further comprising adjusting a property of the material to improve compatibility with the underground well.
11 . The method of claim 13 , wherein the property comprises at least one of pH, microbial growth potential, tendency to auto-polymerize, or flash point.
12 . A system for sequestering carbon-containing materials, the system comprising:
a carbon-containing material comprising at least one of lignin pulp or a waste material from a paper mill; and
at least one of a container, a pump, or a pipe for injecting the material into an underground well.
13 . The system of claim 12 , wherein the material comprises the lignin pulp.
14 . The system of claim 12 , wherein the material comprises the waste material from the paper mill.
15 . The system of claim 12 , wherein the material further comprises bio-oil.
16 . The system of claim 12 , wherein the material further comprises biochar.
17 . The system of claim 12 , wherein the underground well comprises at least one of a commercial disposal well, a salt cavern, a Class II cavern, a depleted mine, an abandoned mine, a purpose-constructed mine, or a natural cavern.
18 . The system of claim 12 , wherein the material has been subjected to a test for compatibility with the underground well.
19 . The system of claim 12 , further comprising at least one of a blender or a filter for adjusting a property of the material to improve compatibility with the underground well.
20 . The system of claim 19 , wherein the property comprises at least one of pH, microbial growth potential, tendency to auto-polymerize, or flash point.