Invention Grant
US07992640B2 Organic acid treating fluids with viscoelastic surfactants and internal breakers
有权
有机酸处理液与粘弹性表面活性剂和内部破碎剂
- Patent Title: Organic acid treating fluids with viscoelastic surfactants and internal breakers
- Patent Title (中): 有机酸处理液与粘弹性表面活性剂和内部破碎剂
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Application No.: US11626163Application Date: 2007-01-23
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Publication No.: US07992640B2Publication Date: 2011-08-09
- Inventor: Tianping Huang , James B. Crews
- Applicant: Tianping Huang , James B. Crews
- Applicant Address: US TX Houston
- Assignee: Baker Hughes Incorporated
- Current Assignee: Baker Hughes Incorporated
- Current Assignee Address: US TX Houston
- Agency: Mossman Kumar & Tyler PC
- Main IPC: E21B43/27
- IPC: E21B43/27 ; C09K8/72 ; C09K8/74

Abstract:
An aqueous fluid system that contains an aqueous dicarboxylic acid solution, a viscoelastic surfactant as a gelling agent to increase the viscosity of the fluid, and an internal breaker such as mineral oil and/or fish oil to controllably break the viscosity of the fluid provides a self-diverting acid treatment of subterranean formations. The internal breaker may be at least one mineral oil, a polyalphaolefin oil, a saturated fatty acid, and/or is an unsaturated fatty acid. The VES gelling agent does not yield viscosity until the organic acid starts to spend. Full viscosity yield of the VES gelling agent typically occurs at about 6.0 pH. The internal breaker allows the VES gelling agent to fully viscosify the spent organic acid at 6.0 pH and higher, but as the spent-acid VES gelled fluid reaching reservoir temperature, controllable break of the VES fluid viscosity over time can be achieved.
Public/Granted literature
- US20100252266A1 Organic Acid Treating Fluids With Viscoelastic Surfactants and Internal Breakers Public/Granted day:2010-10-07
Information query
IPC分类: