The molecular composition of alkyl substituted monocyclic aromatic hydrocarbons from asphaltite of the Ivanovskoe deposit was analyzed by means of the gas chromatography-mass spectrometry technique. Unlike most crude oils and natural bitumens, asphaltite is characterized by an unusual composition of practically all isobaric-homologous series of this class of hydrocarbons. The specific features of the composition of these series is a strong prevalence of C-12-C-23 1-alkyl-2,3,6-trimethylbenzenes with an irregular isoprenoid chain. These compounds are derivatives of isorenieratene, a carotenoid that occurs in anoxic photosynthetic green sulfur bacteria of the Chlorobiaceae family (Chlorobium genus). The ortho - isomers evidently prevail among C-13-C-25 alkyltoluenes, thus indicating a low level of catagenetic transformation of the asphaltite. n-Alkylbenzenes are practically absent from the monoalkylbenzene series; these are represented by the complete set of C-17 - C-19 phenylalkanes. Such compounds were detected for the first time in natural bitumens.

Results of researches of coals of lias and dogger deposits of Tomsk area, which total thickness reaches 60 m, are presented. It is shown, that coals possess high oil-and-gas generating potential, and in the territory of Tomsk area there are oil pools, genetically connected with the carbonaceous organic substance.

Experience of modelling of generation, migration and accumulation of an oil in one of regions of Tomsk area with the purpose of exploration works risk decrease is presented. It is noted, that one of the basic conditions of successful performance of modeling works is necessity of the authentic geochemical information reception.

Using the method of chromatic-mass-spectrometry molecular composition of monocycle aromatic pyrobitumen hydrocarbons at Ivanovsk deposit was analysed. It was stated that in contrast to most of oils and natural bitumens, pyrobitumen is characterised by unusual compound composition of practically all isobaric-homologous series of this hydrocarbon period. To the number of peculiarities of their composition, firstly, evident predominance of 1-alkyl-2,3,6-trimethylbenzols of С13-С22 composition with isoprenoid chain of irregular composition refers. Such compounds are derivatives of isorenieratene carotinoid, which is included in anoxygeneous photosynthetic green sulphuric bacteria of Chlorobiaceae family (Chlorobium species). Secondly, among alkyl-toluole of С13-С25 composition there is an apparent predominance of orthoisomers, which points out the low level of katageneous conversion of the object. Thirdly, n-alkylbenzols are practically absent in monoalkylbenzol series. The latter are presented by представлены полным набором изомеров фенилалканов состава С17-С19. Such compounds in the composition of natural bitumens were identified for the first time.