An Experimental Study of Locally Assembled Vacuum Chamber and Estimation of Sample Porosities from Various Formations, Northern Iraq
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Abstract
In this study, the porosity measurement of fourteen outcrop samples from different locations is examined using an in-house vacuum chamber. The vacuum chamber is tested for any leak to secure the experiment's integrity. To meet the process development required, part of the samples was tested in a more sophisticated device to provide well-aimed results and decrease the margin of error where B (1,2) and S5 were measured using a nitrogen porosimeter to attain further accuracy and reliability and compare the results to a saturation method. Both measurements of porosity can provide insights into the outcome of the constructed porosimeter. Afterward, the water saturation for the remaining samples was commenced and the results of the last nine samples in crude oil are compared. Notably, S6 has a porosity of (9.89 %) by water imbibition and (3.46 %) by crude oil imbibition which suggests that the S6 sample is strongly water-wet rock. S7 and S13 have a porosity increase of (1.46 %) and (3.84 %), respectively in crude oil saturation and it can be an indication of oil-wet rock. The objective of this research is to design and assemble an affordable porosimeter and evaluate through porosity measurement the samples from various formations.
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