NATURAL SCIENCES

Journal of fundamental
and
applied researches

Hydrocarbon composition of oil field Sostinskoe

2013. №4, pp. 118-126

Badmaev Chinghis Mingiyanovich - Ph.D. (Chemistry), Assistant, Kalmyk State University, 11 Pushkin Str., Elista, 358000, Republic of Kalmykia, Russian Federation, chingizbadmaev@mail.ru.

Tseren-Ubushieva Danara Vladislavovna - student, Kalmyk State University, 11 Pushkin Str., Elista, 358000, Republic of Kalmykia, Russian Federation, chemical@kalmsu.ru.

This article is devoted to the study of the patterns of distribution of n-alkanes and isoprenanes in crude oil field Sostinskoe (wells 3, 8, 9). Group hydrocarbon composition oil field Sostinskoe was determined by aniline points (GOST 12329-77). It is established that in the narrow fractions 60-95 ? C oil field Sostinskoe, wells number 3, 8, 9, the predominant class of hydrocarbons are alkanes (84.04, 85.46 and 86.89 %, respectively), followed by the arenas (15.96, 14.54 and 13.11 % respectively), naphtha no. In the fraction of 95–122 °C the predominant class of hydrocarbons are alkanes (55.10, 57.75 and 60.40 %, respectively) followed by naphthenes (28.38, 24.25 and 20.13 %, respectively) and Arena (16.52, 18.00 and 19.47 %, respectively). In the fraction of 122–150 ?C are the predominant class of alkane hydrocarbon (55.09, 56.14 and 57.19 %, respectively) followed by naphthenes (29.66, 28.91 and 28.17 %, respectively) and arenas (15.25, 14.95 and 14.64 %). In the fraction of 150–200 ?C are the predominant class of alkane hydrocarbon (66.54, 55.82 and 45.10 %, respectively) followed by naphthenes (22.18, 31.49 and 40.80 %, respectively) and arenas (11.28, 12.69 and 14.10 %, respectively). Total fraction of from 60 to 200 ?C are the predominant class of alkane hydrocarbon (65.19, 63.79 and 62.39 %, respectively) followed by naphthenes (20.06, 28.22 and 22.28 %, respectively) and arenas (14.75, 15.04 and 15.33 %, respectively). The relative distribution of n-alkanes in isoprenanes crude was examined by gas chromatography. In oil field Sostinskoe, wells number 3, 8, 9 has a maximum at the peaks of n-nonane, n-octane and n-decane that the relative concentration of 7.93, 7.03 and 6.62 %, respectively. Content of n-alkanes C20 to C11 ranges within narrow limits (5.26–6.10 %). Coming up with a C20 C29 by a decrease in the content of n-alkanes. The relative concentrations of pristane and phytane 1.08 and 0.64 %, 1.09 and 0.59 %, 1.17 and 0.67 %, respectively, their ratio is 1.76, 1.83, 1.70 %. For oils continental genesis ratio pristane / phytane is more than 3, and for the oil marine origin – less than 1 Sostinskogo oil field occupies an intermediate position, and should be referred to the oils of lacustrine origin.

Key words: alkanes,izoprenany,naphthenes,arenas,pristane,phytane,gas chromatography,a method of aniline points