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Investment
This study failed to receive any particular offer out-of any capital enterprises in the personal, industrial, or not- for- earnings circles.
Publisher’s Mention
The clay minerals content can be obtained from various logs with certain advantages and inherent limitations, but the most commonly used technique and probably one of the most accurate methods is based on the using natural gamma ray log and the spectral components of it (i.e., K, and Th) [4, 5, 18]. The natural gamma ray log and its spectral logging data, comprising potassium (wt%), thorium (ppm), and uranium (ppm) respond to the natural radioactivity in the formation originates mainly from 40 K (0.01167% of total naturally occurring potassium), 232 Th (100% of natural thorium) and 235 U (% of the total uranium) isotopes and their daughter products in the both cased and open boreholes . The clay minerals are often the primarily radiation sources in the formations . This means that the natural gamma ray and its spectral data are often capable of distinguishing between the clay-free (low reading) and the clay-rich sandstones (high reading) on general . The response of the natural gamma ray log and its spectral components can be expressed as a linear function of the clay content (i.e., IA in Eq. 1) with assumption of the constant radioactivity, no additional radioactive elements, good borehole conditions, and no variation in the density .
During the establish studies, the latest quantitative mineralogy out quizy grindr of 76 core products extracted from the new Shurijeh Development can be used to assess the precision off several existing amendment tips into absolute gamma beam and its own spectral components investigation. The accuracy of your measures try checked based on minimum mediocre % cousin error of each and every petrophysical opportinity for estimate the quantity of clay, making use of the comparison of your own log-derived viewpoints into the true laboratory-counted volume per cent away from clay nutrition. Certain initiatives are also designed to calibrate the newest signing viewpoints on the lab-derived clay contents of 76 center samples because of the running a low-linear regression calibration relationship involving the center-counted clay information and also the sheer gamma beam index. Ultimately, the fresh new depositional environment and differing clay variety of the fresh new Shurijeh Creation was basically acknowledged, utilising the spectral gamma beam signing percentages as well as the associated get across-plots of land, respectively.
Strategies
The linear natural gamma ray and the potassium and thorium indexes (IGR, IPOTA, and ITHOR) were continuously calculated at each depth level from the corrected logging data, using the Eq. (1).
New comparative look at the Shrijeh Development weight percent clay from the latest center analysis and differing modifications suggested because of the Larinov , Clavier , Steiber , Dewan , Bhuyan and you may Passey together with empirical calibration matchmaking (dashed curvilinear contours). Black colored circle Gasoline creating really investigation factors, and you may black colored upwards-directing triangle the low-generating really investigation factors
The average clay contents attained by the latest in your town calibrated gamma beam directory was 9. Such amounts had been lower than the values extracted from the latest former variations and was basically in more accordance for the research mentioned analysis. These results have seen a great effect on the quote of hydrocarbon in position and reserves of the Shurijeh. Full, the genuine and estimates regarding weight % clay regarding other changes, put the fresh new Shurijeh Development regarding the shaly sandstone group.
Records
Rudi Was, Afarin Yards (2016) Interpretation the origin and you may tectonic setting out-of coastal sediments throughout the Northeastern away from Oman Ocean. Int J Spend Resour six(224):dos