Device and method for testing expanding and percolation characteristics of microfractures of compact reservoir

A technology for tight reservoirs and feature testing, applied in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve problems such as increasing the complexity of tight reservoir media and complex seepage

Active Publication Date: 2017-08-18
ZHEJIANG OCEAN UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Complex fracture systems aggravate the complexity of tight reservoir media, leading to the occurrence of complex seepage phenomena

Method used

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  • Device and method for testing expanding and percolation characteristics of microfractures of compact reservoir

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for micro-fracture expansion and seepage characteristics of tight reservoirs, characterized in that the test device is used to measure the single-phase seepage characteristics of gas under different micro-fracture expansion degrees, comprising the following steps:

[0033] Step 1: Select the natural rock core of the tight reservoir with micro-cracks, after pasting the radial and axial strain gauges, put the core into the three-axis core holder 9 to ensure that the radial and axial strain gauges are consistent with the front, The stress-strain detection interface on the back-end plug is tightly attached, the front and rear end faces of the rock core are closely attached to the acoustic wave probes in the grooves of the front and rear end plugs, and the front-end plug of the holder is tightened; open the two-way switch 40 to utilize the confining pressure The single-cylinder piston pump 23 loads the core with a confining pressure of 3 MPa, keeps the confining pres...

Embodiment 2

[0040] A method for micro-fracture expansion and seepage characteristics of tight reservoirs, the test device is used to measure the single-phase seepage characteristics of oil under different micro-fracture expansion degrees, comprising the following steps:

[0041] Step 1: Select the natural rock core of the tight reservoir with micro-cracks, after pasting the radial and axial strain gauges, put the core into the three-axis core holder 9 to ensure that the radial and axial strain gauges are consistent with the front, The stress-strain detection interface on the back-end plug is tightly attached, the front and rear end faces of the rock core are closely attached to the acoustic wave probes in the grooves of the front and rear end plugs, and the front-end plug of the holder is tightened; open the two-way switch 40 to utilize the confining pressure The single-cylinder piston pump 23 loads the core with a confining pressure of 3 MPa, keeps the confining pressure constant, closes ...

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Abstract

The invention relates to a device and method for testing expanding and percolation characteristics of microfractures of a compact reservoir, belonging to the technical field of oil-gas field development. The device comprises a triaxial rock core holding device, a microfracture expanding pressure system, a microfracture detection system, a percolation displacement system and a percolation data collection system. The method comprises the following steps: (1) applying an axial pressure to a rock core in the triaxial rock core holding device so as to expand microfractures; (2) monitoring development and evolution characteristics of the microfractures of the rock core by virtue of an ultrasonic fault detector, and monitoring deformation characteristics of the rock core by virtue of a stress-strain detection instrument; and (3) testing percolation characteristics of fluid under different microfracture development conditions of the rock core by virtue of a percolation displacement device. The device and the method disclosed by the invention have the beneficial effects that a measurement result is accurate, the assembling is convenient, the operation is simple, the percolation characteristics of oil, gas and water in the microfractures of the compact reservoir can be tested, and the necessary technical support can be provided for fracture development of the compact reservoir.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a testing device and method for micro-fracture expansion and seepage characteristics of tight reservoirs, which can measure the seepage characteristics of oil, gas and water in rock cores with different micro-fracture development states. Background technique [0002] With the continuous consumption of conventional oil and gas resources, unconventional tight oil and gas has gradually become a new field of realistic exploration and development that people pay attention to. Its effective exploitation is bound to provide strong support and guarantee for ensuring the balance between the supply and demand of natural gas in the country and for the country's international energy decision-making ability. Against the backdrop of good development prospects for tight oil and gas resources, many countries have made the development of tight oil and gas an impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/082
Inventor 龙运前宋付权黄小荷刘静余璇王永政
Owner ZHEJIANG OCEAN UNIV
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