Invention Grant
- Patent Title: Methods, treatment fluids and systems for differential acidizing of a siliceous material
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Application No.: US15754048Application Date: 2015-09-30
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Publication No.: US10738237B2Publication Date: 2020-08-11
- Inventor: Aaron M. Beuterbaugh , Enrique Antonio Reyes
- Applicant: Halliburton Energy Services, Inc.
- Applicant Address: US TX Houston
- Assignee: Halliburton Energy Services, Inc.
- Current Assignee: Halliburton Energy Services, Inc.
- Current Assignee Address: US TX Houston
- Agency: C. Tumey Law Group PLLC
- Agent Thomas Rooney
- International Application: PCT/US2015/053161 WO 20150930
- International Announcement: WO2017/058193 WO 20170406
- Main IPC: E21B43/26
- IPC: E21B43/26 ; C09K8/72 ; C09K8/528 ; C09K8/70 ; C09K8/76

Abstract:
The rapid reaction of hydrofluoric acid with siliceous materials can make it difficult to increase the permeability of subterranean formations containing siliceous minerals. Methods for stimulating a subterranean formation can comprise: providing a latent hydrofluoric acid composition comprising a degradable matrix, and a hydrofluoric acid precursor dispersed in the degradable matrix; introducing a first treatment fluid containing the latent hydrofluoric acid composition in a non-dissolved form into a wellbore penetrating a subterranean formation comprising a siliceous material; differentially depositing the latent hydrofluoric acid composition upon a portion of the siliceous material in one or more locations; degrading at least a portion of the degradable matrix, thereby exposing at least a portion of the hydrofluoric acid precursor; converting the exposed hydrofluoric acid precursor into hydrofluoric acid; and reacting the hydrofluoric acid with the siliceous material where the latent hydrofluoric acid composition was deposited.
Public/Granted literature
- US20180251673A1 METHODS, TREATMENT FLUIDS AND SYSTEMS FOR DIFFERENTIAL ACIDIZING OF A SILICEOUS MATERIAL Public/Granted day:2018-09-06
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