US 11,692,129 B2
Carbon sequestration by proppants
Dallin P. Laycock, Alberta (CA); Charlotte Plombin, Alberta (CA); and Samuel K. Huisman, Houston, TX (US)
Assigned to CONOCOPHILLIPS COMPANY, Houston, TX (US)
Filed by ConocoPhillips Company, Houston, TN (US)
Filed on Aug. 29, 2022, as Appl. No. 17/822,870.
Application 17/822,870 is a continuation of application No. 17/736,087, filed on May 3, 2022.
Claims priority of provisional application 63/201,662, filed on May 7, 2021.
Prior Publication US 2023/0020657 A1, Jan. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 8/80 (2006.01); E21B 43/267 (2006.01)
CPC C09K 8/805 (2013.01) [C09K 8/80 (2013.01); E21B 43/267 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of sequestering carbon and producing hydrocarbon from an underground formation having at least one well, comprising the method steps of:
a) making a proppant by:
i) capturing CO2 from a gas or liquid;
ii) reacting said CO2 with magnesium or calcium ions in a carbon mineralization reaction under alkaline pH to make porous particles of magnesium carbonate or calcium carbonate, wherein said particles have:
(1) a crushing rate of less than 10% at 28 MPa,
(2) a bulk density of 1.5-2.5 g/cm3,
(3) a size of 0.1-2 mm, and
(4) a porosity of 30-50%;
iii) size sorting said particles to produce size ranges of between 20 mesh and 40 mesh, said size sorted particles being a proppant;
b) introducing a first fractured fluid (FF) through said at least well into the underground formation at a pressure greater than a minimum in-situ rock stress for formation of fractures (FR) in the underground formation;
c) introducing a second FF containing said proppant through said at least one well into the underground formation to prop open said FR and thereby sequestering carbon from said CO2 in said underground formation; and
d) producing hydrocarbon from said at least one well.