The peripatetic fossils: part 3
The articles printed below are by co-authors of some of the papers called into doubt by Talent. Two are by close colleagues of Gupta at the Centre of Advanced Study in Geology at Panjab University.
Geology of Ladakh, Lahaul and spiti regions of Himalaya with special reference to the stratigraphic position of flysch deposits
ZusammenfassungAus Feldarbeiten und bereits vorliegenden Fakten resultierte eine neue geologische Karte des Gebietes von Ladakh, Lahaul und Spiti im Himalaya. Die Stratigraphie wird mit Hilfe neuer Fossilfunde geändert und mit anderen Teilgebieten des Himalayas verglichen. Das Alter der Flyschserien (Indus-Flysch von Ladakh und Chikkim-Shales von Spiti) wurde mit Hilfe von Mikrofaunen bestimmt.AbstractAn attempt has been made to produce the geological map of Ladakh, Lahaul and Spiti regions of Himalaya on the basis of the field work done by the authors and the observations made by earlier workers. The stratigraphy of this region has been discussed in the light of new fossil finds from different stratigraphical horizons. Stratigraphical columns have been prepared and the formations of this region have been correlated with those exposed in other parts of the Himalaya. The age of the flysch deposits (Indus Flysch of Ladakh and Chikkim Shales of Spiti) has been defined on the basis of the microfauna.RésuméLes levés de terrain des auteurs, combinés avec des travaux antérieurs, ont permis de dresser une nouvelle carte géologique du Ladakh, Lahaul et Spiti dans l'Himalaya. La stratigraphie a été modifiée grâce à de nouvelles découvertes de fossiles et comparée avec celle d'autres régions de l'Himalaya. L'âge de la série du flysch (Flysch de l'indus de Ladakh et schistes de Chikkim de Spiti) a été déterminé à l'aide de microfaunes.кРАткОЕ сОДЕРжАНИЕНА ОсНОВАНИИ сОБстВЕ ННых пОлЕВых РАБОт И п О ДАННыМ ДРУгИх АВтОРОВ, АВтОРы НАстОьЩЕгО Оп УБлИкОВАНИь пОстАРА лИсь пОстРОИть гЕОлОгИЧЕ скУУ кАРтУ лАДАхА, лАхАУлА И спИтИ гИМАлАь. пО НОВ ЕИшИМ ОпИсАНИЕМ ФАУНы РАжлИЧНых гОРИжОНтО В сОстАВИлИ стРАтИгР АФИЧЕскУУ кОлОНкУ ДАННОИ ОБлАс тИ И сРАВНИлИ с пОРОДАМИ ОБНАжЕНИИ Иж ДРУгИх Ч АстЕИ гИМАлАЕВ. пО МИкРОФАУ НЕ ОпРЕДИлИ ВОжРАст ФлИ шЕВых сВИт (ИНДУс ФлИш лАДАхА И ЧИккИМ АРгИлИты спИтИ).
Predicting the gas resource potential in reservoir C-sand interval of Lower Goru Formation, Middle Indus Basin, Pakistan
Abstract The integrated study of seismic attributes and inversion analysis can provide a better understanding for predicting the hydrocarbon-bearing zones even in extreme heterogeneous reservoirs. This study aims to delineate and characterize the gas saturated zone within the reservoir (Cretaceous C-sand) interval of Sawan gas field, Middle Indus Basin, Pakistan. The hydrocarbon bearing zone is well identified through the seismic attribute analysis along a sand channel. The sparse-spike inversion analysis has efficiently captured the variations in reservoir parameter (P-impedance) for gas prospect. Inversion results indicated that the relatively lower P-impedance values are encountered along the predicted sand channel. To further characterize the reservoir, geostatistical techniques comprising multiattribute regression and probabilistic neural network (PNN) analysis are applied to predict the effective porosity of reservoir. Comparatively, the PNN analysis predicted the targeted property more efficiently and applied its estimations on entire seismic volume. Furthermore, the geostatistical estimations of PNN analysis significantly predicted the gas-bearing zones and confirmed the sand channel as a major contributor of gas accumulation in the area. These estimates are in appropriate agreement with each other, and the workflow adopted here can be applied to various South Asian regions and in other parts of the world for improved characterization of gas reservoirs.