Experimental method for measuring unconventional tight gas reservoir spontaneous infiltration absorption relative permeability
A technology of relative permeability and spontaneous imbibition, which is applied in the field of measuring relative permeability of spontaneous imbibition, can solve the problems of large gas-water error, high start-up pressure gradient, and difficult injection, so as to reduce measurement error and residual gas saturation The effect of increasing, accurate and reliable data
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[0039] The present invention will be further explained below based on the drawings and examples, so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes fall within the spirit and scope of the present invention defined and determined by the appended claims, they are all protected. Column.
[0040] The experimental method for measuring the relative permeability of spontaneous imbibition in unconventional tight gas reservoirs was completed by using a water drive gas experimental device. figure 1 ) Consists of core holder 1, nuclear magnetic resonance instrument 2, inlet pressure gauge 4, outlet pressure gauge 5, air source 18, water displacement pump 7, confining pressure pump 3, back pressure pump 17, gas-water separator 11, constant temperature The core holder 1 containing the full-diamet...
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