Experiment device and method for simulating drilling-production double-work-condition pit shaft sand carrying multi-phase flowing

Abstract

The invention relates to an experiment device and method for simulating drilling-production double-work-condition pit shaft sand carrying multi-phase flowing. The experiment device consists of a gas supply system, a liquid supply system, a sand injection system, a test pipe section, a separation recovery system and a monitoring system, wherein the test pipe section consists of a transparent inner tube and an outer tube; and the inner tube is dismountable, and is arranged in the outer tube for forming a concentric annular space. The experiment device can be used for meeting the test requirements of six different experiments on flow tests and sand sinking rule tests of gas drilling sand-carrying gas flow, slurry drilling sand-carrying fluid, foam drilling sand-carrying multi-phase flow, sand discharge gas well sand-carrying gas flow, sand discharge oil well sand-carrying oil flow and sand-carrying multi-phase flow when sand-discharge gas well stratum releases water in horizontal and vertical pit shafts under two kinds of work conditions including the drilling work condition and the production work condition; the functions are comprehensive; and economy and practicability are realized.

Description

technical field [0001] The invention belongs to the technical field of drilling and production process experiments of oil and gas wells, and in particular relates to an experimental device and method for simulating sand-carrying multiphase flow in a wellbore under dual working conditions of drilling and production. Background technique [0002] Oil and natural gas have always been strategic resources that control the lifeline of the national economy, and about 70% of the world's oil and gas reservoirs are stored in weakly cemented rock formations, which are prone to sand production during the exploitation process, resulting in gas, solid or liquid, solid formation in the wellbore. And other multiphase flow, accompanied by grit sand plugging, erosion wear, energy loss and other problems. However, excessive sand control during well completion will lead to difficulties in well entry and decreased production. Therefore, in actual mining, we pay great attention to the sand contr...

AI Technical Summary

Problems solved by technology

Numerical simulation research needs to know clear boundary conditions and particle parameters, and the calculation accuracy cannot be guaranteed, so it often requires reference experiments to verify the algorithm

Experimental studies mainly focus on the lift test of gas-liquid two-phase or liquid-solid two-phase in vertical wellbore and inclined wellbore. Experimental Study on Complicated Sand-carrying Problem of Liquid Two-Phase

Moreover, the existing experimental devices are often limited to a single wellbore annulus or a single multiphase flow experiment in the tubing, and cannot simultaneously realize the experimental requirements of dual working conditions of drilling and production.

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