Geology, geography and global energy

Scientific and Technical Journal

Geodynamic factor in distribution of hc accumulation in sediments formation of Ciscaucasia

2013. №2, pp. 60-71

Ulmasvai Felix S.  - D.Sc. in Geology and Minerology, Oil and Gas Research Institute Russian Academy of Sciences, 3 Gubkin st., Moscow, Russia, 119333 ,, ulmasvai@mail.ru

Sidorchuk Elena A.  - C.Sc. in Geology and Minerology, LTD «Gazprom VNIIGAZ», set. Razvilka, Moscow region, Leninsky district, Russia, 115583 ,, elena_sidorchuk@mail.ru

Dobrynina Svetlana A.  - Research associate, Oil and Gas Research Institute Russian Academy of Sciences, 3, Gubkin st., Moscow, Russia, 119333 ,, sveta_dob@rambler.ru

Analysis of dependence of HC accumulations on depths, stratigraphic complex and a kind of fluid has been made. The modern trends of distribution of accumulations of gas and oil on a depth and stratum complexes are got, they confirm primary coincidence of the oil-fields with the more ancient complexes – the deep Paleocene and Cretaceous periods, and gas-fields to younger ones, mainly to the Neocene period and to the shallow located paleogene complex. On the different areas of the studied territory the models of change of layer of oil and gas- bearingness are built. It is shown that deposits in Ciscaucasia form some groups. The areas of distribution of deposits on stratum complexes are taken in a single map. A complete set of derivative digital maps, describing position and distribution on the cardinal points of linear elements of relief is got (received) by the special methods of treatment from topographical, geological, tectonic maps, charts of oil and gas- bearingness and tectonic districts, and also by pictures from space. The character of distribution of linear elements of relief of territory can be considered as an indicator of geodynamic terms. The comparison of derivative maps with the results of model experiments showed that areas with the well-organized location of linear elements indicate on a local compression. Areas with the unregulated location of linear elements indicate on local tension (strain). The picture of distribution of linear elements of relief is an indicator of geodynamic terms of territory. The comparison of the discovering trends of evolution of accumulations of hydrocarbons with the primary extending of linear elements of relief found out the good coincidence of the trends with the position of the large extensive linear elements – fractures (rifts). It is shown that regions of distribution of hydrocarbon fields expand from ancient stratigraphic complex to younger ones. The main directions correspond to principal trends of geodynamic strains. Geodynamic strains, described by faults system are additional factor in distribution of HC accumulation in sedimentary cover. Taking in consideration of geodynamic factor will increase efficiency of searching works

Key words: hydrocarbon fields,line elements of the relief,geodynamic s,strain,stratigraphic complex

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