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US 2022/0025752 A1Published application
Thermally activated strong acids
AssigneeShell Oil Company
InventorsPaul Richard WEIDER, Robert Lawrence Blackbourn, Ying Zhang, Lee Nicky Morgenthaler, Ryan Matthew Van Zanten
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Abstract
An acid-generating fluid includes a thermally activated strong acid precursor. The thermally activated strong acid precursor can include a component selected from aldehydes, ketones, and combinations thereof, in combination with a precursor of a compound adapted to react to liberate sulfur dioxide; or it can include sulfur dioxide in combination with a precursor of a compound adapted to react to liberate a component selected from aldehydes, ketones, and combinations thereof.
Claims9
A method comprising:
- providing an acid-generating fluid that comprises water and a thermally activated strong acid precursor, the thermally activated strong acid precursor comprising:
- sulfur dioxide, and
- a precursor of a compound adapted to react to liberate a component selected from aldehydes, ketones, and combinations thereof;
- placing the acid-generating fluid into a subterranean formation;
- thermally activating the precursor, thereby liberating the component selected from aldehydes, ketones, and combinations thereof;
- and
- reacting the sulfur dioxide and the component selected from aldehydes, ketones, and combinations thereof to form a thermally activated strong acid.
4 more elements
Dependencies are inferred from the claim text.