An Experimental Study on Stress Sensitivity of Tight Sandstones with Different Microfractures
|Published in:||Advances in Civil Engineering, January 2020, v. 2020|
Aiming at the stress sensitivity problem of tight reservoirs with different microfractures, the cores of H oilfield and J oilfield with different microfractures were obtained through the fractures experiment, so as to study the change of gas permeability in tight sandstone core plug during the change of confining pressure. Besides, we use the nuclear magnetic resonance (NMR) spectra of the core before and after saturation to verify whether the core has been successfully fractured. Based on Terzaghi’s effective stress principle, the permeability damage rate (D) and the stress sensitivity coefficient (
|Copyright:||© Xinli Zhao et al.|
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