Геотермия арктического бассейна – проблемы и решения

Проведено двух- и трехмерное моделирование геотермического поля вдоль длинных геотраверсов в Западно-Арктическом бассейне и в Котловинах Подводников, которые были построены по данным сейсмопрофолирования и бурения. Рассчитаны глубины залегания интервала катагенетического преобразования органического вещества для различных участков осадочного бассейна. Наименьшая глубина этого интервала приурочена к Южно-Баренцевской впадине, где по геологоразведочным данным установлен самый высокий углеводородный потенциал. На трехмерных моделях к этому району приурочен «термический купол», выделяемый впервые. Исследования проводились при финансовой поддержке Норвежского нефтяного директората, Президиума РАН, Отделения наук о Земле РАН и РФФИ.

Geothermal studies of Arctic Basin – Problems and Solutions

2D- and 3D-modeling of geothermal field along geotraverses in Western-Arctic and in Podvodniki basins carried out. These ware constructed on deep seismic profiling and drilling data. The catagenetic transformation depths of organic substance for various parts of the sedimentary basin are designed. This interval least depth is dated for Southern-Barents basin where on the prospecting data the highest hydrocarbonic potential is established. On 3D-models «the thermal dome» is dated for this area, allocated for the first time. Heat flow measurements data in the northern part of Svalbard plate near Franz-Josef Land (FJL) and Spizbergen are resulted. Measurements were carried out by new updating geothermal probe “GEOS-M”. Seven heat flow measurements on “FJL” and twenty – on “Spizbergen” are received. On first of them heat flow variation from 30 up to 85 mW/m2 are connected both with trough valley Franz-Victoria tectonic activization and with structural and thermal conductivity heterogenesis inside sedimentary cover. Abnormal heat flow values (from 120 up to 519 mW/m2), measured in trough Orly (to the eastern of Spizbergen North-East Land), testify to rift zone development which completely destroyed a continental crust. These researches were carried out at financial support of the Norwegian oil management, as well as Russian Academy of Science, Earth sciences branch of the Russian Academy of Science and the Russian basic research Foundation