Method for testing flow conductivity of self-supported crack in riverfrac treatment

A technology for water fracturing and conductivity, which is applied in the directions of measurement, production of fluids, and earthwork drilling. Feasible, reliable in principle, simple in fabrication and test device structure
CN102174883AInactive Publication Date: 2011-09-07NORTHEAST GASOLINEEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEAST GASOLINEEUM UNIV
Publication Date
2011-09-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for testing flow conductivity of self-supported cracks in riverfrac treatment. The method comprises the steps of: manufacturing a core test piece which satisfy closed state of the crack wall surface after pressure relief return of riverfrac treatment, drilling a phi 50*100 mm cylindrical test piece, enabling the cylindrical test piece to be orthogonal with a pre-formed scratch, splitting the pre-formed scratch to manufacture a tensile fracture type crack wall surface, dislocating the crack wall surface, smoothly grinding the end surface of the core test pieceto obtain a non-proppant non-engaged crack wall surface combination; then testing the flow conductivity of the crack, putting the manufactured core test piece into a core clamping system, simulating formation stress and temperature, setting and sending a control instruction, enabling each system to work and feed back signals, and finally, collecting the test results and calculating the flow conductivity of self-supported crack in the riverfrac treatment. The method in the invention can really reflect the tensile fracture and shear slip process of the riverfrac treatment, and reduce the process to a pressure and temperature environment under the ground to test the flow conductivity; and the test method is achievable.
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Description

1. Technical field:

[0001] The invention relates to an indoor test and evaluation method for the conductivity of self-supporting fractures in clear water fracturing during oil and gas field development, and specifically relates to a method for testing the conductivity of self-supporting fractures in clear water fracturing. 2. Background technology:

[0002] Clear water fracturing refers to the fracturing operation in which drag-reducing agents, active agents, anti-swelling agents, etc. or linear glue are added to clean water as the working fluid in the reconstruction of low-permeability oil and gas reservoirs. Generally, no or a small amount is added to the working fluid Proppant. A large number of field practices have proved that compared with traditional gel fracturing, clear water fracturing can produce better stimulation effects in low-permeability oil and gas reservoirs, and the construction cost is significantly lower than that of traditional gel fracturing. However, ...

Claims

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