Self-support fracture testing and analyzing device and method for oil-gas field development

Abstract

The invention relates to a self-support fracture testing and analyzing device and method for oil-gas field development. The device is mainly composed of a fluid storage tank, an advection pump, a pretreated working fluid tank, a reverse mold fluid tank, a flow conduction chamber, a displacement sensor, a hydraulic press, a fracture maker, a back-pressure controller, a collected fluid bottle, a data acquisition and control board and a computer. The method comprises the following steps: naturally breaking a rock core into two rock plates; putting the rock plates into the inner cavity of the flow conduction chamber to form a self-support in-fracture fluid flow region; applying an initial pressure so that the in-fracture fluid flow region is fully filled with the testing fluid; pretreating the in-fracture fluid flow region; starting the computer, inputting experimental parameters, and injecting the testing fluid; acquiring self-support fracture flow conductivity; treating the in-fracture fluid flow region again; and driving the reverse mold fluid into the flow conduction chamber to form a reverse mold casting. The invention can simulate the actual situation of the self-support fracture to acquire accurate flow conductivity test data, and can also acquire the flow form of the self-support in-fracture fluid.

Description

technical field [0001] The invention relates to a self-supporting fracture testing and analyzing device and method for oil and gas field development. Background technique [0002] In the process of fracturing, the reservoir rock is stretched and damaged and shear slips, and the fractures that are uneven and cannot be completely closed are self-supporting fractures. The fracturing construction that forms self-supporting fractures does not require the use of proppant and jelly fracturing fluid, which greatly reduces the damage to the reservoir. The test and analysis of self-supporting fractures directly affects the optimization of fracturing construction parameters. However, domestic related research is still in its infancy. Therefore, it is more necessary and urgent to form a self-supporting fracture testing and analysis device and method that truly simulates reservoir conditions. [0003] The current test and analysis devices and methods for simulating self-supporting cra...

AI Technical Summary

Problems solved by technology

[0004] (1) Using a single-sided triangular press knife to create a seam may cause the direction of the artificial fracture to deviate, resulting in an increase in the pressure loss of the experimental test and a large increase in the error of the experimental data;

[0005] (2) The size of the diversion chamber is fixed, and the processing requirements for rock samples are extremely high;

[0006] (3) The pretreatment process of different working fluids cannot be simulated;

[0007] (4) There are no special experimental equipment and methods for the analysis of fluid flow patterns in self-supporting fractures

Images