True triaxial experiment device and method capable of simulating radial pressure

Abstract

The invention discloses a true triaxial experiment device capable of simulating radial pressure. The device comprises a horizontal fixed chassis and a gear motor; the bottom of the horizontal fixed chassis is fixedly connected with a plurality of supporting columns arranged in a circumferential array; an experiment box body is rotationally arranged on the upper surface of the horizontal fixed chassis; a rock core test piece is placed in the experiment box body; the left-right horizontal direction of the experiment box body is taken as an x direction; the front-back horizontal direction of theexperiment box body is used as a y direction; an x-direction pressing mechanism is arranged on the left side of the interior of the experiment box body with the vertical direction of the experiment box body as the z direction; a y-direction pressing mechanism is arranged on the front side of the interior of the experiment box body; a z-direction pressing mechanism is arranged at the bottom of theexperiment box body; and the bottom of the experiment box body is in transmission connection with a main shaft of a gear motor through a belt transmission mechanism. Stress and pore pressure of a rockcore in three-axis directions can be simulated, thickened oil thermal recovery is simulated by injecting hot steam into the rock core test piece, and a complex seepage test is realized by rotating the experiment box body.

Description

technical field [0001] The invention relates to the technical field of thermal recovery of heavy oil and effective development of unconventional organic shale oil, in particular to a true triaxial experimental device and method capable of simulating radial pressure. Background technique [0002] At present, the development of shale oil technology often involves three-dimensional formation stress and pore pressure technical conditions. Considering the critical pressure gradient of shale oil flow in organic matter, organic matter supplies liquid to inorganic matter pores through diffusion, and channeling flows between inorganic matter and fractures. [0003] The differential equation of three-dimensional fluid motion in the rock formation under stress is: [0004] [0005] Through the establishment of tectonic stress field and seepage coupling equation, the fluid potential field of oil and gas migration can be numerically simulated, so as to quantitatively predict the oil a...

AI Technical Summary

Problems solved by technology

[0006] Using the existing methods to study the seepage of organic shale oil often has the following problems: 1) The formation pressure simulation cannot be performed; 2) The formation pore pressure cannot be added; 3) The shale oil cannot be heated by hot steam in the core to achieve seepage ; 4) There is a lack of research on simultaneous seepage in complex well patterns

Images