فهرست نشریات علمی دسترسی آزاد ایران

The concentrations of trace metals in crude oil samples and core well rocks obtained from five oil fields: Halfaya, Noor, Amara, north, and south Buzurgan, were analyzed using an atomic absorption spectrophotometer. The results showed the ranges of the trace transition elements are in core well rocks in the order Ni (4.292-7.113 ppm), Fe (2.541-4.256 ppm), Zn (0.953- 2.056 ppm), Co (1.262-1.38 ppm), Cu (0.181-1.31 ppm), Cd (0.419-0.71 ppm), Mn (0.278- 0.387 ppm), Cr (0.217- 0.343 ppm), Pb (2.508- 31.333 ppm), Sn (0.149-0.537 ppm), the metalloid (0.105-0.212 ppm), the alkaline metals Ca (14.19- 19.31 ppm), Mg (9.205- 10.55 ppm), Ba (3.989-6.928 ppm), the alkali metals K (7.395-13.52 ppm), and Li (0.842- 1.134 ppm). While in crude oil , the order V was in the range (2.523- 102.741 ppm), Ni in the range (20.143-28.103ppm), Zn (5.142- 8.723 ppm), Fe (2.016- 5.872 ppm), Mn (0.756- 1.042 ppm), Co (0.483-0.924 ppm), Cu (0.2830- 0.871 ppm), Cr (0.283- 0.731 ppm), Cd (0.1870- 0.631 ppm), alkaline metals Ca (4.441- 9.424 ppm), Mg (3.869-9.724 ppm), Ba (2.211- 3.792 ppm), alkali metals K (4.122- 6.631 ppm), and Li (2.175-4.897 ppm). The post-transition metals Pb was in the range of (3.631-9.892 ppm), Sn (0.189-0.312 ppm), and metalloid in the range of (0.106-0.252 ppm). Trace element ratios Ca/Mg, Mg/Ca, Mn/Ca, and Cr/Ni, were used to unravel the genetic correlation among the core well rocks and V/Ni, V/(V +Ni) ratios showed marine origin and oxic conditions of the crude oil.