Layer-selecting T2 relaxation spectrum rapid testing method for porous medium
A technology of porous media and testing methods, applied to measuring devices, instruments, and nuclear magnetic resonance analysis, etc., can solve problems such as difficult to obtain the change law of physical parameters of rock cores, inability to reflect the difference of rock cores, bedding superposition, etc.
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[0042] Below in conjunction with accompanying drawing, further describe the present invention through embodiment, but do not limit the scope of the present invention in any way.
[0043] In the present invention, by designing a T2 relaxation spectrum test pulse sequence with a layer selection function, under a constant layer selection gradient, the CPMG pulse sequence is used to simultaneously perform layer selection coding on the spatial position points, and realize the nuclear magnetic resonance T2 relaxation at different positions in the porous medium. The test and analysis of the prediction spectrum can obtain the physical parameter characteristics of different positions of the porous medium, which can be used for the T2 relaxation spectrum of the different layer selection positions of the porous medium test sample.
[0044] Embodiment A sandstone core is selected as a porous medium test sample, the porosity is 15.8%, the permeability is 8 mD, and the core is in the shape o...
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Abstract
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