Method to optimize rate of CO
A method including pumping a solution comprising carbonic acid produced via contact of carbon dioxide and water into each of a plurality of zones of a formation, wherein the solution flows into one or more second via fractures or other permeabilities in the plurality of zones, and reacts with reactive rock in the plurality of zones or intervals of the formation to produce a solid and a resulting solution. The method further includes producing the resulting solution, and monitoring, via a sensor, a property of the resulting solution, and adjusting a flow rate of the pumping, a flow rate of the solution comprising carbonic acid flowing into one or more of the plurality of zones of the formation, a flow rate of the resulting solution flowing from one or more of the plurality of zones, or a combination thereof based on the property.
1 . A method comprising:
pumping, via one or more injection wells, a pumped solution comprising carbonic acid into a plurality of permeable zones of a formation comprising reactive rock, whereby the solution comprising carbonic acid reacts with a reactive rock of the formation to produce a solid carbonate,
producing, via one or more producer wells, a recovered solution that flows into one or more producer wells via the plurality of permeable zones;
monitoring, via one or more sensors, a property of the recovered solution; and
adjusting, based on the property of the recovered solution, a flow rate of the recovered solution flowing from one or more of the plurality of permeable zones into the one or more producer wells, wherein the adjusting, based on the property, comprises substantially real time adjusting, responsive to a change in the property, one or more flow control devices to reduce or increase a flow rate of the recovered solution into the producer well.
2 . The method of claim 1 , wherein the property comprises a pH of the recovered solution, a CO 2 concentration of the recovered solution, or a combination thereof.
3 . The method of claim 2 , wherein the one or more producer wells further comprise adjustable flow control devices associated with each of the plurality of permeable zones, each of the flow control devices configured to control the flow rate of the recovered solution from the corresponding one of the plurality of permeable zones into one of the producer wells.
4 . The method of claim 3 , wherein the one or more sensors comprise a pH sensor located proximate each of the adjustable flow control devices.
5 . The method of claim 4 , wherein the adjusting, based on the property, further comprises adjusting, responsive to a change in pH of the recovered solution in comparison to an initial pH of the pumped solution, one or more of the flow control devices to reduce a flow rate of the recovered solution into the producer well.
6 . The method of claim 5 , wherein the change in pH results from contact of the pumped solution with rock in the permeable zones of the formation, whereby the carbonic acid reacts with the rock to produce the solid carbonate and the recovered solution that has a higher pH than the initial pH of the pumped solution.
7 . The method of claim 5 , wherein the adjusting of the one or more flow control devices is effectuated autonomously in situ or is effectuated via a command/control signal from a surface.
8 . The method of claim 2 , further comprising adjusting, based on the property, a flow rate of the pumped solution flowing from the one or more injection wells into one or more of the plurality of permeable zones.
9 . The method of claim 8 , wherein each of the one or more injections wells further comprise adjustable flow control devices associated with each of the plurality of permeable zones, each of the flow control devices configured to control the flow rate of the pumped solution into one of the plurality of zones or intervals of the formation.
10 . The method of claim 9 , wherein the adjusting further comprises, responsive to a property of the recovered solution deviating a threshold amount from a designated amount for the property, increasing or decreasing the flow rate of the pumped solution into one or more of the plurality of permeable zones.
11 . The method of claim 9 , further comprising adjusting, based on the property, a flow rate of one or more surface pumps pumping the pumped solution into the one or more injection wells.
12 . The method of claim 2 , further comprising adjusting, based on the property, a flow rate of one or more surface pumps pumping the pumped solution into the one or more injection wells.
13 . The method of claim 12 , wherein the adjusting further comprises, responsive to a property of the recovered solution deviating a threshold amount from a designated amount for the property, increasing or decreasing the flow rate of one or more surface pumps pumping the pumped solution into the one or more injection wells.
14 . The method of claim 1 , wherein (i) each of the one or more injection wells is divided into isolated portions via adjacent pairs of packers, each of the isolated portions of the injection wells is configured to flow the pumped solution into one of the plurality of permeable zones, (ii) each of the one or more producer wells is divided into isolated portions via adjacent pairs of packers, each of the isolated portions of the producer wells of the producer wells is configured to receive flow of the recovered solution from one of the plurality of permeable zones, or (iii) both (i) and (ii).
15 . The method of claim 1 further comprising:
(i) prior to pumping the pumped solution, fracturing the formation to provide the plurality of permeable zones;
(ii) subsequent pumping the pumped solution for a period of time, re-fracturing the formation to enhance permeability of the plurality of permeable zones; or
(iii) both (i) and (ii).
16 . The method of claim 1 further comprising:
after a period of time, reversing flow direction by pumping the pumped solution into the one or more producer wells, and producing the recovered solution via the one or more injection wells.
17 . The method of claim 1 , wherein the formation comprises reactive rock selected from mafic rocks, ultramafic rocks and minerals and/or fragments thereof.
18 . The method of claim 1 , wherein the one or more flow control devices include: one or more outflow control devices, each of the outflow devices configured to control a flow rate of the solution comprising carbonic acid from one of the one or more injection wells into one of the plurality of zones or intervals of the formation, one or more inflow control devices, each of the inflow control devices configured to control the flow rate of the recovered solution from one of the plurality of zones or intervals of the formation into one of the one or more producing wells; or a combination thereof.