Experimental study on gas diffusion law from drill cuttings during the whole desorption process
Abstract：Based on sensor and computer data acquisition technology,gas diffusion law during the whole desorption process was measured by using measuring device of gas flow from drill cuttings;then test data was analyzed by using curve fitting toolbox of Matlab,curves of gas diffusion law were acquired.Research results show that gas flow from drill cuttings achieves maximum value as soon as diffusion process begins,flow crest appears at the same time,and then attenuates to zero gradually.Dead space results in the appearance of flow crest,whose appearance time has relation to spout area of coal sample container.At interval between zero to t,curves of gas diffusion law occur a horizontal asymptote（viz.Qv=0）,but the vertical asymptote which proved by few researchers doesn＇t occur.
Keywords：drill cuttingsgas diffusionpeak valuedead spacespout area
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)