Horizontal well rock debris transportation simulation experiment set and experiment method

Abstract

The invention relates to a horizontal well rock debris transportation simulation experiment set and experiment method which are used for simulating oil drilling and coal bed gas drilling. The horizontal well rock debris transportation simulation experiment set comprises a drill fluid system, a rock debris transportation system, a rock debris supply system, a power system, a data processing system and a rock debris recovering system. The drilling liquid system is composed of a liquid storage tank, a motor, a centrifugal pump, a flowmeter and a butterfly valve which are connected. The rock debris transportation system is composed of a converting connector, a glass tube, a PVC tube, a rock carrying tool, an eccentric triangular plate and the like. The rock debris supply system is composed of a spiral feeder and a rock debris filling device. The power system is composed of a speed regulating motor and a speed changing gear. The rock debris recovering system is composed of a recovering tube, a filter and a rock debris recovering pool. The horizontal well rock debris transportation simulation experiment set and the experiment method can be used for visually observing the transportation condition of horizontal well rock debris, and the influence of different discharge capacities, drill stem rotating speeds, the eccentricity between a drill stem and a borehole, rock debris amounts and rock debris grain sizes on a horizontal well rock debris transportation rule can be simulated. The horizontal well rock debris transportation simulation experiment set is simple and practical, and low in construction cost.

Description

technical field [0001] The invention relates to an experimental device and an experimental method for simulating oil drilling and coalbed methane drilling. The experimental device can perform visual observation on a horizontal well cuttings migration simulation experimental device and an experimental method. Background technique [0002] In the process of oil and coalbed methane drilling and production, in order to effectively increase the exposed area of ​​oil and gas layers, improve recovery, increase single well productivity, increase single well control area, and achieve "high production with fewer wells", horizontal well drilling technology is often used. A horizontal well is a well whose inclination reaches or approaches 90°, and the well body is drilled along the horizontal direction for a certain length of well. Sometimes, for some special needs, the inclination exceeds 90°. This is the cuttings migration zone of the horizontal well. Here comes the technical difficul...

AI Technical Summary

Problems solved by technology

The accumulation of cuttings in the annulus is likely to cause high torque and high resistance of the drill string, sticking and sticking, causing difficulties in running casing and cementing, large wear of drilling tools, and difficulty in running in well logging tools.

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