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Test method for compact reservoir volume fracture conductivity

A technology for tight reservoirs and conductivity, which is applied in earth-moving drilling, wellbore/well components, etc. It can solve the problem that the conductivity of fractures cannot be simulated realistically, the influence of fracture conductivity of the fracture coupling surface cannot be quantified, and the accuracy of fracture conductivity cannot be accurately simulated. Expression cracks etc.

Active Publication Date: 2017-04-26
SOUTHWEST PETROLEUM UNIV
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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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  • Test method for compact reservoir volume fracture conductivity
  • Test method for compact reservoir volume fracture conductivity
  • Test method for compact reservoir volume fracture conductivity

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Embodiment 1

[0059] A method for testing the conductivity of volume fractures in tight reservoirs, the method comprising the following steps:

[0060] Step S01: Select the tight reservoir core or the outcrop of the same layer as the tight reservoir material; when selecting the tight reservoir material, first clean the weathered rock layer near the outcrop, and then excavate a large piece of fresh rock along the thickness direction of the tight reservoir. core

[0061] Step S02: Process the tight reservoir material into a cuboid rock slab with a length of 14 cm, a width of 5 cm, and a thickness of 3.8 cm; during the process of prefabricating the rock slab, the contact time with water should be reduced or an inert gas medium should be used;

[0062] Step S03: split the rock slab into two halves along the midline under the effective closure pressure of the reservoir; wrap the rock slab processed in S02 with adhesive tape to maintain the viscous force between the rock slab bedding, and then U...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 任岚黄静赵金洲黄波姜景耀
Owner SOUTHWEST PETROLEUM UNIV
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