Typy pułapek gazu ziemnego i strefowość występowania ich złóż w osadach miocenu wschodniej części zapadliska przedkarpackiego
Abstract
Traps for gas accumulations and the resulting zonation of the gas fields in the Miocene strata of the eastern part of the Carpathian Foredeep (SE Poland).
S u m m a r y. The intention of this paper is to present the description of the traps for gas accumulations in the Miocene deposits of the Carpathian Foredeep and the resulting zonation of the gas fields. The traps are related first of all to the palaeomorphology of the pre-Miocene basement formed by erosion supported by faulting processes. This type of traps is classified as compactional traps. The second kind of very productive structural traps was recognised beneath the Carpathian sole thrust, at the front of the Carpathians. The fault related trapping mechanism is also known from several gas fields. The pinching-out trap types caused by the horizontal and the vertical facies changes are rare and occur most often in the topmost part of the Miocene succession, because of the more favourable facies and less compactional deformation of the strata. According to the geological features and the types of the traps and sealing mechanisms, five gas field’s zones were recognized in the eastern part of the Carpathian Foredeep.
S u m m a r y. The intention of this paper is to present the description of the traps for gas accumulations in the Miocene deposits of the Carpathian Foredeep and the resulting zonation of the gas fields. The traps are related first of all to the palaeomorphology of the pre-Miocene basement formed by erosion supported by faulting processes. This type of traps is classified as compactional traps. The second kind of very productive structural traps was recognised beneath the Carpathian sole thrust, at the front of the Carpathians. The fault related trapping mechanism is also known from several gas fields. The pinching-out trap types caused by the horizontal and the vertical facies changes are rare and occur most often in the topmost part of the Miocene succession, because of the more favourable facies and less compactional deformation of the strata. According to the geological features and the types of the traps and sealing mechanisms, five gas field’s zones were recognized in the eastern part of the Carpathian Foredeep.