	US 11,787,997 B2
	Treatment fluid composition for high temperature multi-stage fracturing applications
Abdullah Al Moajil, Dammam (SA); and Waddah H. Almahri, Dammam (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Mar. 21, 2022, as Appl. No. 17/655,695.
Prior Publication US 2023/0295485 A1, Sep. 21, 2023
Int. Cl. C09K 8/528 (2006.01); C09K 8/536 (2006.01)

CPC C09K 8/528 (2013.01) [C09K 8/536 (2013.01)]

20 Claims

1. A method, comprising:

introducing a composition that is a water-in-oil emulsion into a wellbore as a single stage treatment such that it fluidly interacts with an oil-based mud sludge or a filter cake at a target zone,

wherein the composition does not include a mutual solvent;

wherein the water-in-oil emulsion has an organic phase and an aqueous phase, the organic phase comprising an organic solvent, an emulsifier, and a wetting agent, and the aqueous phase comprising water and a chelating agent,

wherein the oil-based mud sludge or the filter cake comprises barite;

wherein the target zone has a deposit of the oil-based mud sludge or the filter cake;

maintaining the wellbore by shutting-in the wellbore and allowing the composition to penetrate the oil-based mud sludge or the filter cake in a target zone, thereby allowing the composition to remove a portion of the oil-based mud sludge or the filter cake; and

hydraulic fracturing the wellbore.