Bandaru An excellentR (2010) Clay-typing, depositional ecosystem and you will framing a petrophysical design getting creation testing in Vashista Profession, Krishna–Godavari Basin-a situation studies. In: The latest 8th Biennial globally conference exposition out of oils geophysics, Hyderabad, Asia

Alavi M, Vaziri H, Seyed-Emami K, Lasemi Y (1997) The new Triassic and you can related stones of the Nakhlak and you will Aghdarband elements in the main and you can northeastern Iran while the traces of your south Turanian energetic continental Bull 109(12):1563–1575

Afshar Harb An effective (1979) Stratigraphy, tectonic and oil geology out of Kopet-Dagh area, northeast Iran. PhD dissertation. The united kingdomt, College out of Science and you may Technical, College or university away from London area

Ulmishek Sweetheart (2004) Petroleum geology and types of the new Amu-Darya basin, Turkmenistan, Uzbekistan, Afghanistan, and you can Iran. You Agency of Indoor, Us Geological Questionnaire, Iran

NIOC (National Iranian Oils Organization, Exploration Directorate) (1986) Gonbadli geological really achievement declaration. National Iranian Oils Organization records, Tehran, Iran

Moussavi-Harami Roentgen, Brenner RL (1993) Diagenesis out-of low-aquatic oil reservoirs: brand new neocomian (down cretaceous) Shurijeh Formation, Kopet-Dagh basin, NE Iran. J Oils Geol 16(1):55–72

Jozanikohan G, Norouzi GH, Sahabi F, Me) Employing multilayer perceptron sensory system from inside the quantity of clay estimation: research study of Shurijeh energy tank, Northeastern Iran. J Nat Gas https://datingranking.net/pl/chatavenue-recenzja/ Sci Eng 31(22):119–131

Jozanikohan Grams, Sahabi F, Norouzi GH, Me) Quantitative study of the clay nutrition on the Shurijeh tank creation having fun with mutual X-beam logical process. Russ Geol Geophys 57(7):1048–1063

Money

This study did not get any specific offer out of one capital firms about personal, industrial, or perhaps not- for- profit groups.

Publisher’s Notice

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., I_A in Eq. 1) with assumption of the constant radioactivity, no additional radioactive elements, good borehole conditions, and no variation in the density .

Within the establish analysis, the new quantitative mineralogy of 76 center trials obtained from the new Shurijeh Formation is employed to assess the accuracy of a multitude of existing amendment strategies into sheer gamma ray and its particular spectral portion analysis. The accuracy of procedures are checked on the basis of minimum mediocre per cent relative mistake each and every petrophysical means for estimation the quantity out-of clay, utilising the testing of your own record-derived thinking towards correct laboratory-measured regularity percent out-of clay nutritional elements. Specific attempts have also designed to calibrate the fresh new logging philosophy towards the lab-derived clay belongings in 76 key trials from the powering a low-linear regression calibration matchmaking between your core-mentioned clay information in addition to sheer gamma ray index. Eventually, the newest depositional environment and differing clay brand of the new Shurijeh Formation was in fact recognized, utilizing the spectral gamma beam logging ratios therefore the associated cross-plots of land, correspondingly.

Methods

The linear natural gamma ray and the potassium and thorium indexes (I_GR, I_POTA, and I_THOR) were continuously calculated at each depth level from the corrected logging data, using the Eq. (1).

This new relative glance at the Shrijeh Creation pounds percent clay of the fresh center study as well as other improvement advised by Larinov , Clavier , Steiber , Dewan , Bhuyan and you will Passey together with empirical calibration dating (dashed curvilinear traces). Black colored circle Fuel generating well study circumstances, and black right up-pointing triangle the fresh new low-producing really investigation points

The typical clay content material achieved by the newest locally calibrated gamma beam directory was indeed 9. Such amounts was basically lower versus opinions obtained from this new former changes and you may had been much more conformity to the laboratory counted studies. This type of conclusions have acquired a beneficial impact on the fresh new estimation out-of hydrocarbon set up and reserves of the Shurijeh. Full, both genuine and estimates from pounds per cent clay on the more changes, put the Shurijeh Creation regarding shaly sandstone category.

Sources

Rudi Was, Afarin Meters (2016) Interpretation the origin and you may tectonic means out of seaside sediments on the Northeastern of Oman Ocean. Int J Waste Resour six(dosdos4):dos