Naslov
Defining electro-log markers in poorly consolidated, heterogeneous clastic sediments using standard deviation data trends – an example from the Sava Depression, Pannonian Basin System

Autori
Cvetković, Marko ; Malvić, Tomislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
16th Hungarian & 5th Croatian and Hungarian congress abstract and program book / Horváth, Janina ; Wágenhoffer, Andrea ; Geiger, János ; Cvetković, Marko ; Malvić, Tomislav - Segedin : Hungarian Geology Society ; INA Oil Industry Plc., 2013, 01-1

ISBN
978-963-8221-49-0

Skup
XVI. CONGRESS OF HUNGARIAN & V. CONGRESS OF CROATIAN AND HUNGARIAN GEOMATHEMATICS

Mjesto i datum
Mórahalom, Mađarska, 29.05.2013. - 31.05.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
electro-log markers; poorly consolidation; sediments; Sava Depression

Sažetak
Introduction E-log markers are by default derived from well logs. The oldest approach considers defining markers using only electric logs (E- logs) such as spontaneous potential (SP) and resistivity (R). The newer approaches for defining markers also rely on newer well logs such as gamma ray, compensated neutron and others. Those are all focused mainly on recognizing motifs that can be observed on well logs and then correlated Sediments in which these motifs can be recognized are mostly thick marls in which the motif itself is controlled by minor change in marl porosity (Vrbanac, 2002). This approach is valid for sediments in which thick marl or shale intervals occur but is not applicable when a high variation in lithological composition and depositional environment is present which is characteristic for the last phase in evolution of the Pannonian Basin System (PBS) (Malvić & Velić, 2011). Therefore, for the purpose of acquiring meaningful correlation, a new method of determining E-log markers is established. In the Sava Depression, this last phase of the evolution of the PBS corresponds to the lithostratigraphic unit of the Lonja Formation, which is composed of sediments deposited during Pleistocene, Pliocene and Holocene (Malvić & Velić, 2011 ; Velić, 2002). Its base is determined by a  MÓRAHALOM, HU, 30May-01June, 2013 1 16th HU and 5th HR-HU Geomathematical Congress 30 May – 01 June, 2013 well log marker ’. The morphology of this marker differs from ones determined in older sediments. Basically it separates the thick sandstone or marlstone sequences in its base from the frequent interchange of poorly consolidated sandstones, sands, clays and silts above. For the purpose of structural and lithofacies analysis of those younger sediments, which belong to the Lonja Formation, E-log marker alfa’ had to be followed among the wells in explored area. --------------------------------- Entire extended abstract/paper is attached.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA