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Pore aperture size (r36) calculation from porosity or permeability to distinguish dry and producing wells
Arabian Journal of Geosciences ( IF 1.827 ) Pub Date : 2021-05-14 , DOI: 10.1007/s12517-021-07185-1
Abdel Moktader A. El Sayed , Nahla A. El Sayed

Four hundred eighty sandstone core samples obtained from three different hydrocarbon charged formations of different geologic ages (Pliocene; Miocene and Cretaceous) and different geographic locations (Egypt and Hungary) are used to correlate the effective pore aperture size adopted by Winland (r35) and new r36 of the present work. These pore aperture percentiles (r35 and r36) are calculated with different empirical equations and correlated with each other to declare which one is effective, simple, and has no additional sources of error. In the present work, new r36 was calculated two times: first from porosity only (Ør36) and the second time from permeability only (Kr36). Both are correlated to r35.The calculated coefficient of correlations between Ør36 and r35 were (R2 = 0.54, 0.71, and 0.73) for the Bahariya, Szolnok, and El Wastani formations, respectively. However, the correlation between Kr36 and r35 is showing very high coefficient of correlations (R2 = 0.9963, 0.9927, and 0.9957) for the Bahariya, Szolnok, and El Wastani formations, respectively. The novel Kr36 could be very helpful to discriminate between dry (pore aperture size < 0.5 μm) and producing wells (pore aperture size > 0.5 μm or 5000 A°) in case of absent of porosity data. Model verification indicates a very close matching between Kr36 and Wr35 vertical profiles in Baltim level III main reservoir (Miocene in age). This confirms the beneficial application of Kr36, which is derived from permeability only, instead of Winland-r35 in all reservoir lithofacies.



中文翻译:

根据孔隙率或渗透率计算孔径大小(r36),以区分干燥井和生产井

从不同地质年龄(上新世,中新世和白垩纪)的三个不同烃类带电地层(埃及和匈牙利)获得的480个砂岩岩心样品用于关联Winland(r35)和新油田采用的有效孔径大小当前工作的第36页。这些孔隙百分位(r35和r36)是根据不同的经验方程计算得出的,并且相互关联以声明哪一个有效,简单且没有其他误差源。在目前的工作中,新的r36计算了两次:第一次仅根据孔隙率(Ør36),第二次仅根据渗透率(Kr36)。两者都与r35相关。Ør36和r35之间的相关系数计算为(R 2分别对Bahariya,Szolnok和El Wastani地层分别为0.54、0.71和0.73)。但是,对于Bahariya,Szolnok和El Wastani地层,Kr36和r35之间的相关性显示出非常高的相关系数(R 2 = 0.9963、0.9927和0.9957)。在缺少孔隙率数据的情况下,新型Kr36有助于区分干燥(孔径小于0.5μm的孔)和生产井(孔径大于0.5μm或5000 A°的孔)。模型验证表明,巴尔提姆III级主油藏(年龄为中新世)中的Kr36和Wr35垂直剖面非常吻合。这证实了Kr36的有益应用,它仅来自渗透率,而不是Winland-r35在所有储层岩相中的应用。

更新日期:2021-05-14
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