基本信息:
- 专利标题： METHODS AND COMPOSITIONS FOR DIVERTING ACID FLUIDS IN WELLBORES
- 专利标题（中）：用于在油井中分配酸性流体的方法和组合物
- 申请号：PCT/US2008/057405 申请日：2008-03-19
- 公开(公告)号：WO2008115941A1 公开(公告)日：2008-09-25
- 发明人： CREWS, James, B. , HUANG, Tianping
- 申请人： BAKER HUGHES INCORPORATED , CREWS, James, B. , HUANG, Tianping
- 申请人地址： P.O. Box 4740 Houston, TX 77027 US
- 专利权人： BAKER HUGHES INCORPORATED,CREWS, James, B.,HUANG, Tianping
- 当前专利权人： BAKER HUGHES INCORPORATED,CREWS, James, B.,HUANG, Tianping
- 当前专利权人地址： P.O. Box 4740 Houston, TX 77027 US
- 代理机构： DUPHORNE, Darin, H.
- 优先权： US11/689,203 20070321
- 主分类号： C09K8/60
- IPC分类号： C09K8/60 ; C09K8/72 ; C09K8/74
摘要：
Viscoelastic surfactant (VES) gelled aqueous fluids containing a VES, an internal breaker, and optionally a viscosity enhancer are useful as diverting fluid for directing placement of an acid into a subterranean formation, where the acid is injected subsequent to introducing the VES gelled fluid. These VES-based diverting fluids have faster and more complete clean-up than polymer-based diverting fluids. The viscosity enhancers may include pyroelectric particles and/or piezoelectric particles. The VES gelled fluid may optionally contain a fluid loss agent which increases the viscosity of the fluid and/or facilitates development of an external viscous VES fluid layer (e.g. a pseudo-filter cake) on the formation face. The VES gelled fluid may also optionally contain an agent that stabilizes the viscosity of the fluid, for instance at high temperatures, such as MgO, Mg(OH) 2 , CaO, Ca(OH) 2 , NaOH, and the like.
摘要（中）：
粘弹性表面活性剂（VES）含有VES，内部破碎剂和任选的粘度增强剂的凝胶水性流体可用作转向流体，用于将酸引入地下地层中，其中在引入VES凝胶流体之后注入酸。 这些基于VES的转向流体比基于聚合物的转移流体更快，更完整地清理。 粘度增强剂可以包括热电颗粒和/或压电颗粒。 VES凝胶化流体可以任选地含有流体损失剂，其增加流体的粘度和/或促进形成面上的外部粘性VES流体层（例如伪滤饼）的显影。 VES凝胶状流体还可任选地含有稳定流体粘度的试剂，例如在高温下，例如MgO，Mg（OH）2，CaO，Ca（OH） 2N，NaOH等。