Simulation system and prediction method for dynamic sand-carrying capacity of drilling fluid

Abstract

According to the simulation system and the prediction method for the dynamic sand-carrying capacity of the drilling fluid, the inclination angle of the simulation pipeline can be changed in real time through the winch, then the temperature and the instantaneous flow of the drilling fluid are obtained through the temperature sensor, the flow sensor and the like, and in the dynamic sand-carrying simulation process of the drilling fluid, the dynamic sand-carrying capacity of the drilling fluid is predicted. After the experimental sand particle size, the drilling fluid rheological parameters, the hole drift angle and the drilling fluid flowing space are determined, the critical flow of the drilling fluid can be obtained through experimental observation, then the obtained data serve as a sample training set training model, and a trained drilling fluid dynamic sand-carrying capacity prediction model is obtained. The corresponding critical flow can be obtained only by inputting related engineering parameters into the trained drilling fluid dynamic sand-carrying capacity prediction model, then accurate prediction of the drilling fluid dynamic sand-carrying capacity is achieved, and the problems that in the prior art, the experiment difficulty is large, consumed time is long, and sand-carrying capacity judgment cannot be conducted anytime and anywhere are solved.

Description

technical field [0001] The invention relates to the technical field of evaluating and predicting the dynamic sand-carrying capacity of drilling fluid, in particular to a simulation system and a prediction method for the dynamic sand-carrying capacity of drilling fluid. Background technique [0002] Extended-reach wells are increasingly used in many fields such as sidetracking of old wells, offshore oil production, and efficient development of various low-efficiency oil and gas fields. However, extended-reach wells are prone to produce cuttings beds, which will seriously affect construction efficiency. It may even cause serious accidents such as drill sticking. In addition, in the fracturing technology, whether the drilling fluid can carry the fracturing sand to the predetermined position is also the key to whether the fracturing can be carried out smoothly. Therefore, it is of practical significance to evaluate the dynamic sand-carrying ability of the drilling fluid. [000...

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Problems solved by technology

[0003] Aiming at the research on this problem, many researchers have set up drilling fluid rock-carrying simulation test benches, but the indicators for evaluating the drilling fluid sand-carrying ability are the drilling fluid flow rate or mud flow rate to bring the static experimental sand out of the experimental pipeline. Pump flow rate, the starting flow rate of sand particles obtained by this test method from static to dynamic is not consistent with the critical flow rate of sand particles from being carried to settlement, and the formation process of cuttings beds in engineering practice is a process of settlement from dynamic to static , so using the start-up speed or start-up flow rate of sand particles from static to dynamic as the index to evaluate the dynamic sand-carrying capacity of drilling fluid is inconsistent with engineering practice

In addition, the research on this problem is still in the experimental stage, and the obtained data has not been deeply excavated. The limited experimental data cannot correspond to complex engineering practices. If we want to obtain as reliable experimental results as possible, we can only In the new engineering situation, adjust the independent variables according to the working conditions to carry out the experiment again, but this kind of experiment is difficult, time-consuming, has high requirements on the site and experimenters, and cannot be carried out anytime and anywhere, so it cannot guide engineering practice in time

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