Well wall reinforcing stability evaluation system

Abstract

The invention discloses a well wall reinforcing stability evaluation system. The well wall reinforcing stability evaluation system comprises a shaft device, wherein the shaft device is provided with an inner cylinder which can form a simulated well wall by using a filled drilling stratum geological material and form a simulated shaft cavity by using the simulated well wall; the simulated shaft cavity is used for containing liquid; and the simulated shaft cavity is provided with a shaft cavity pressurizing pipeline, a shaft temperature detector and a stirrer. According to the evaluation system,the geological material taken from a drilling stratum is used as the simulated well wall, and the shaft cavity pressurizing pipeline, the shaft temperature detector and the stirrer are arranged in the simulated shaft cavity formed by the simulated well wall, so that the pertinence is high, and therefore, a pressurized well wall stability evaluation test in the well wall under a dynamic conditioncan be realized; and compared with an existing evaluation technology, an evaluation test result can be relatively comprehensive and reliable, and the drilling operation of an oil-gas well can be reliably guided.

Description

technical field [0001] The invention relates to an experiment system, in particular to a well wall reinforcement stability evaluation system for oil and gas well drilling research. Background technique [0002] The stability of wellbore is the most common problem faced in the drilling operation of oil and gas wells, and it is one of the most important factors leading to complex accidents in drilling operations, which seriously affects the safety and cost of drilling operations. Economic losses of hundreds of millions of dollars. There are many factors that affect the stability of the borehole wall, the most prominent of which are the quality of reinforcement and the choice of drilling fluid. Therefore, how to comprehensively and effectively evaluate the stability of wellbore reinforcement quality is one of the key technical means to guide the smooth and efficient development of oil and gas well drilling operations. [0003] However, currently disclosed methods for evaluati...

AI Technical Summary

Problems solved by technology

These evaluation techniques can only realize the wellbore stability evaluation test under the pressure in the static state of the wellbore, but cannot do the wellbore stability evaluation test under the dynamic state in the wellbore, and cannot simulate the impact of the formation on the reinforced wellbore. Reverse pressure, unable to evaluate the reverse pressure bearing capacity of the well wall reinforcement, so that the stability of the well wall reinforcement quality cannot be comprehensively and effectively evaluated, and the reliability of the guidance for oil and gas well drilling operations based on the evaluation results is not good

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