Experimental device for simulating mud cake formation process

Abstract

The invention discloses an experimental device for simulating the formation process of mud cake, which comprises a simulated wellbore and an invasion chamber, the simulated wellbore is respectively connected with a feeding bin and a pressurized pump, and a stirring shaft is installed at the shaft of the simulated wellbore, and the stirring shaft and Stirring motor transmission connection, an impeller is set on the stirring shaft, a window is opened on the simulated wellbore, a formation module is installed in the invasion chamber, the invasion chamber is sealed and connected to the window of the simulated wellbore, and a Filtration flow measurement device. The invention realizes mud filtration experiments under different mud types, different mud pressures, and different hydrodynamic conditions, and creates favorable conditions for studying mud cake formation rules and evaluating mud filtration and wall-building properties, and is helpful for optimizing mud performance , It is of great significance to protect the reservoir productivity.

Description

technical field [0001] The invention relates to the field of petroleum exploration and development, and belongs to the technical category of reservoir rock physics experiments, in particular to an experimental platform for simulating the formation process of drilling mud cakes. Background technique [0002] During overbalanced drilling, mud cake will be formed on the well wall to delay the invasion of the mud filtrate into the formation and prevent the hole wall from collapsing. Therefore, the formation law of drilling mud cake is an important research content of drilling engineering. [0003] At present, the existing mud cake formation process simulation devices at home and abroad mainly include: simulated well-scale mud invasion simulation device; core-scale mud invasion simulation device; drilling fluid dynamic and static fluid loss instruments. [0004] The advantages of the simulated well-scale mud invasion simulation device: the wellbore hydrodynamic environment and mu...

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Problems solved by technology

[0007] In view of the problems of high cost, low utilization rate, and unrealistic simulation degree of the current mud cake formation simulation device, the present invention designs an experimental device with a moderate size of the experimental object, complete functions, and the ability to realistically simulate the mud cake formation process under complex drilling conditions. It is of great significance to study the law of mud cake formation, optimize mud performance, and protect reservoir productivity

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