A device for testing the conductivity of variable fractures and high bifurcation fractures under triaxial stress
A technology of conductivity and triaxial stress, which is applied in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problems of deviation between conventional conductivity test results and actual conditions, etc.
Active Publication Date: 2019-09-27
NORTHEAST GASOLINEEUM UNIV
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[0004] The purpose of the present invention is to provide a device for testing the conductivity of variable seams and high bifurcation fractures under triaxial stress, which is used to solve the conventional conductivity test results There is a huge deviation from the actual situation
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[0036] Below in conjunction with accompanying drawing, the present invention will be further described:
[0037] combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, the rock sample used in this device for testing the conductivity of variable fractures and high bifurcated fractures under triaxial stress is prepared as a trapezoidal rock slab containing multiple bifurcated fractures with gradually changing fracture heights, placed on a triaxial In the pressure diversion chamber 1, simulate the flow of fracturing fluid in bifurcated fractures under conditions close to the real ground stress and analyze the influence of factors such as fracture height change rate, number of bifurcation points, and branch fracture width on fracture conductivity .
[0038] refer to figure 1 , the device used to test the conductivity of variable fractures and high bifurcation fract...
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The invention relates to a device for testing the diversion capacity of variable seam and high bifurcation fractures under triaxial stress, which includes a diversion chamber, an overlying pressure loading device, a seam opening pressure loading device, and a seam tail pressure loading device; the cavity in the diversion chamber The lower part is equipped with a variable-angle bottom plate, and the test rock sample is placed on the variable-angle bottom plate. The test rock sample is a trapezoidal rock slab containing multiple bifurcated cracks with gradually changing fracture heights. Test the loading of the overlying pressure of the rock sample; the closing pressure loading block is installed on both sides of the diversion chamber, and the closing pressure is applied to both ends of the test rock sample; the pressure device at the opening of the seam and the pressure loading device at the end of the seam are installed in the crack in the test rock sample The two ends of the extension direction are used to apply pressure in the direction of fracture extension to the test rock sample; the overlying pressure loading device has a fracture width measurement device. The invention can realize the measurement and evaluation of the conductivity of the fracturing fluid in flat fractures with gradually changing fracture heights, single bifurcations with constant fracture heights and multiple bifurcations with variable fracture heights.
Description
technical field [0001] The invention relates to a device for testing the flow conductivity of variable seams and high bifurcation cracks under triaxial stress, in particular to a device for testing the flow conductivity of variable seams and high bifurcation cracks under triaxial stress. Background technique [0002] Fracture conductivity is an important parameter for fracturing design and evaluation of fracturing effects in oilfield development. At present, the conventional test method of conductivity is to test and evaluate the conductivity of fracturing fluid in flat fractures under certain conditions such as closure pressure, temperature, and sand concentration through indoor experimental equipment, and use Darcy's formula to calculate the flow conductivity of fracturing fluid under certain closure pressure. , the influence of fracture width, proppant parameters and fracturing fluid type on conductivity, and the evaluation of fracture conductivity is completed. [0003]...
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IPC IPC(8): G01N15/08
Inventor 艾池张军李晓璇贾丹薄云鹤曾佳
Owner NORTHEAST GASOLINEEUM UNIV