Stratum module mud invasion multifunctional physical simulation system

Abstract

The invention discloses a stratum module mud invasion multifunctional physical simulation system. The stratum module mud invasion multifunctional physical simulation system includes a stratum module saturation device, a drilling mud preparation device and a mud invasion physical simulation device; the mud invasion physical simulation device comprises a simulation wellbore, fan-shaped invasion chambers and an invasion dynamic data acquisition device; the simulation wellbore is connected with a feeding bin and a pressurizing pump respectively; a stirring shaft and impellers are installed at the axis of the simulation wellbore; the stirring shaft is in transmission connection with a stirring motor; windows are formed in the simulation wellbore; fan-shaped stratum modules are installed in the fan-shaped invasion chambers; the fan-shaped invasion chambers are in sealed connection with the windows of the simulation wellbore; outlet ends of the fan-shaped invasion chambers are provided with leak-off flow measuring devices; and the dynamic data acquisition device is connected with the invasion chambers. The stratum module mud invasion multifunctional physical simulation system of the invention has the advantages of modularization, visualization, high simulation fidelity, high utilization rate, high precision, complete functions and the like. A multi-invasion chamber structure is adopted, so that comparison experiment design can be facilitated.

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 a comprehensive experiment platform for simulating drilling mud intrusion into rock modules. Background technique [0002] Drilling mud invasion has always been a difficult problem in the exploration and development of oil and gas fields. During overbalanced drilling, the invasion of mud filtrate and fine particles changes the original state of the reservoir around the well. Misjudgments and missed judgments reduce the accuracy of reservoir logging evaluation; at the same time, mud invasion will also lead to blockage of seepage channels near the wellbore reservoir, seriously affecting single well productivity, and causing huge economic losses to the exploration and development of oil and gas reservoirs. As low porosity and permeability reservoirs have gradually become the main battlef...

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Problems solved by technology

[0006] In view of the high cost and low utilization rate of the simulated well-scale mud invasion simulation device, the simulation degree of the core-scale and sand-filled model mud invasion simulation device is not realistic enough, etc., the present invention designs an experimental object with a moderate size and complete functions, which can realistically simulate complex drilling. The formation module mud invasion multi-functional physical simulation system of mud invasion under certain conditions provides a theoretical basis for the study of reservoir mud invasion characteristics and reservoir damage assessment, and is helpful for improving the success rate of oil and gas reservoir exploration and development, optimizing drilling mud performance, and protecting reservoirs. Capacity is significant

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