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1. 发明申请

US20130081826A1 IN-SITU GENERATED BUFFER SYSTEM 审中-公开
标题翻译：现场生成缓冲系统
公开(公告)号：US20130081826A1
公开(公告)日：2013-04-04
申请号：US13630238
申请日：2012-09-28
申请人： Saudi Arabian Oil Company
发明人： Mohammed H. Al-Khaldi , Masalli A. Al-Otaibi , P. P. Najeeb
IPC分类号： C09K8/52 , E21B29/02
CPC分类号： C09K8/52
摘要： An aqueous buffered treatment solution for removing mud cake from a well bore treatment site is made by inducing an elevated temperature in an aqueous pre-buffer solution. The aqueous pre-buffer solution is made of an acid precursor that hydrolyzes into a treatment acid, a conjugate base salt that forms the conjugate base of the acid, and an aqueous fluid. Inducing the elevated temperature forms the treatment acid. The treatment acid is operable to remove mud cake. A method for removing a portion of mud cake from a treatment site using an aqueous buffered treatment solution to establish flow-back includes the step of introducing the aqueous pre-buffer solution to the treatment site. The introduction occurs such that the pre-buffer solution fluidly contacts the mud cake. The hydrocarbon-bearing formation induces the elevated temperature in the solution. Reaction between treatment acid and the acid-reactive constituents removes a portion of the mud cake.
摘要翻译：通过在水性预缓冲溶液中诱导高温来制备用于从井眼处理部位除去泥饼的含水缓冲处理溶液。水性预缓冲溶液由水解成处理酸，形成酸的共轭碱的共轭碱盐和水性流体的酸前体制成。诱导升高的温度形成处理酸。处理酸可操作以除去泥饼。使用水性缓冲处理溶液从处理部位除去一部分泥饼以建立回流的方法包括将水性预缓冲液引入处理部位的步骤。引入发生使得预缓冲溶液与泥饼流体接触。含烃地层在溶液中引起升高的温度。处理酸和酸反应性成分之间的反应除去了一部分泥饼。

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