Abstract
Using the example of paleotemperature modeling of the Kiterbyutskaya suite of the Mesozoic-Cenozoic section, opened by a deep well at the Bovanenkovskoye oil – gas condensate field (Yamal Peninsula), the influence of paleoclimate factors on the thermal history of the Lower Jurassic oil source deposits, the duration of the main phase of petroleum formation and the value of the paleothermometric maximum and oil generation density. The original computer methodology is described, which takes into account the parameters of the tectonic and sedimentation history, as well as the history of the thermophysical properties of the sedimentary formation, including permafrost and glaciers, and not requiring a priori information about the values and nature of the deep heat flow is given. The features of the model parametrization are shown. The reliability of the results is confidently controlled by the geophysical criterion of the “discrepancy”, comparison with experimental data on the heat flow, and consistency with the drilling data. The presentation is based on the works of the Tomsk School of Geothermics, carried out as part of the development of a methodological base of geothermics as a geophysical oil prospecting method.
Highlights
A quantitative assessment of the prospects for the oil and gas potential of the territories – the assessment of the density of hydrocarbon (HC) resources – is performed by the volumetric-genetic method
On the representative section of the Bovanenkovskoye field of the Yamal Peninsula, it has been established that taking into account the “arctic” secular variation of temperatures on the Earth’s surface and the Neopleistocene permafrost allows us to correctly reconstruct the thermal history of the oil source rocks of the Kiterbyutskya suite
The reliability of the results of paleotemperature modeling is confidently controlled by the geophysical criterion of the “discrepancy”, comparison with experimental data on heat flow in the study area, consistency with drilling and well testing data
Summary
A quantitative assessment of the prospects for the oil and gas potential of the territories – the assessment of the density of hydrocarbon (HC) resources – is performed by the volumetric-genetic method (basin modeling). Mesozoic-Cenozoic climate and the geothermal regime of the oil source Kiterbyutskaya suite of the Arctic region of Western Siberia.
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