Generation of Hydrocarbons by Hydrothermal Transformation of Organic Matter of Domanik Rocks

Influence of Hydrothermal and Pyrolysis Processes on the Transformation of Organic Matter of Dense Low-Permeability Rocks from Domanic Formations of the Romashkino Oil Field

“…The formation of carbenes and carboides indicates that hydrothermal destructive processes lead to changes in the structural and phase characteristics of asphaltenes and kerogen. Thus, in the paper [21], it was also shown in the case of debituminated samples of rocks from the house deposits of the Sarmanovskaya area of the Romashkino oil field that the increase in the content of asphaltenes and carbene-carboides in the products of hydrothermal experiments obtained in a hydrogen medium at 350°C is due to the destruction of insoluble kerogen. In the products of the experiments, saturated hydrocarbons, including n-alkanes, were also identified.…”

“…The oil-bearing capacity of Romashkino oil field is concentrated in 22 horizons, where the most important reservoirs are in Pashian and Timan horizons. These reservoirs belong to terrigenous deposits of Frasnian strata of Upper The last investigations give reasons to imply that the oilgenerating potential of Domanic deposits from Romashkino oil field is not finished yet as a burial depth, and hence, the thermal history is not enough to cover the intensive generation of hydrocarbons that is crucial for "oil window" [4,11,21,22]. Consequently, hydrothermal and pyrolytic influences on the tight rocks will provide artificial thermal maturity of kerogen with the formation of oil in liquid phase, thus increasing the oil recovery factor of reservoirs.…”

Distinct features of crude oils from Nyurol’ka Depression (Southeast of Western Siberia)

“…Domanik horizon, it is the main source rock in the territory of VUOGP and TPOGP which was formed in the last half of Frasnian age in the late Devonian period (Kayukova et al, 2016).…”

“…Here the sediments rich in OM formed under reducing geochemical conditions in the absence or slow flow of the bottom waters (Neruchev et al, 1986) with the presence of PZA (Bushnev, 2009;Ostroukhov et al, 2015). High bitumen content in the Domanik deposits resulted from the plankton growth, algae, and continental OM (Kayukova et al, 2016). Late Frasnian age deposits were accumulated under unstable conditions in the offshore shallow water and there numerous organogenic constructions were formed (House et al, 2000).…”

“…1A) and Timano-Pechorskaya oil and gas provinces (TPOGP) (Bushnev, 2009;Ostroukhov et al, 2015). The source rock for the oils containing aryl isoprenoids was Domanik horizon (D 3 Frasnian), which is a regional source kitchen for a number of oil fields (Neruchev et al, 1986;Kayukova et al, 2016).…”