Test method for compact reservoir volume fracture conductivity

Abstract

The invention discloses a test method for compact reservoir volume fracture conductivity. The test method comprises the following steps that compact reservoir materials used for making a test piece are selected and prepared into a cuboid rock board; the rock board in the first step is divided in half under reservoir closed pressure, a rough fracture face is scanned through a laser scanner, and a scanning fractal result is output; the rock board divided in half is subjected to conducting form processing; a pressure measuring hole, a fluid inlet and a fluid outlet are correspondingly drilled in the positions of the central lines of the middle and the two ends of the rock board, and the rock board is placed in a conducting room; and the confining pressure of the conducting room is increased to reservoir effective closed pressure, and compact reservoir volume fracture conductivity data are obtained and combined with the measured roughness of the fracture face in the second step to conduct analysis. According to the test method, on the one hand, quantitative analysis of the roughness of the fracture coupling face is achieved to enable the roughness of the fracture coupling face to be compared and analyzed with other factors which influence flow conductivity, on the other hand, the fracture conductivity of the rough fracture face in different shear dislocations and different paved-sand concentrations can be simulated more truly.

Description

technical field [0001] The invention relates to a method for testing the conductivity of volume fractures of tight reservoirs, belonging to the technical field of volume fracturing of tight reservoirs. Background technique [0002] Tight reservoirs have the physical characteristics of low porosity and low permeability. The experience of mine exploration and development shows that volume fracturing in the "sweet spots" with natural fractures and good rock brittleness is an effective means for economical exploitation of tight reservoirs. . Mine microseismic monitoring and laboratory experiments show that under the construction conditions of large displacement and large liquid volume, hydraulic fractures communicate with natural fractures to form a fracture system composed of two diversion forms: self-supporting and self-supporting and proppant composite action. [0003] Tight reservoirs exhibit an "L-shaped" exponential decline law after volume fracturing stimulation, and the...

AI Technical Summary

Problems solved by technology

Although the influence of fracture roughness and shear dislocations on the conductivity of the fracture is considered, the hydraulic behavior of the fracture cannot be accurately expressed. On the one hand, the influence of the roughness of the coupling surface of the fracture on the conductivity of the fracture cannot be quantified. Comparative analysis; on the other hand, it cannot truly simulate the conductivity of fractures on rough fracture surfaces under different shear dislocations and sanding concentrations

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