- 专利标题: METHODS, TREATMENT FLUIDS AND SYSTEMS FOR DIFFERENTIAL ACIDIZING OF A SILICEOUS MATERIAL
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申请号: US15754048申请日: 2015-09-30
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公开(公告)号: US20180251673A1公开(公告)日: 2018-09-06
- 发明人: Aaron M. BEUTERBAUGH , Enrique Antonio REYES
- 申请人: Halliburton Energy Services, Inc.
- 国际申请: PCT/US2015/053161 WO 20150930
- 主分类号: C09K8/76
- IPC分类号: C09K8/76 ; C09K8/70 ; C09K8/528
摘要:
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.
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