In the Ordos Basin, Chang 81, a Member of Yanchang Formation, features development braided river thin-bedded tight sandstones. These sandstones constitute one main production layers oil and gas in Formation within basin. This study integrates data from core samples, drilling, seismic information to identify 81 at Daijiaping, using method constrained correlation between waveform facies. approach...

Varved lake sediments from Lake Żabińskie (northeastern Poland) provide a highresolution calendar-year chronology which allows validation of C dating results. Microscopic analysis of the varve microfacies revealed that laminations found in Lake Żabińskie were biogenic (calcite) varves. Three independent counts indicated a good preservation quality of laminae in the 348 cm long sediment profile ...

The largest Precambrian gasfield in China has been found from the Ediacaran (Sinian) carbonates central Sichuan Basin. deep ancient reservoirs were generally attributed to high-energy mound-shoal body carbonate platform. However, there is still little understanding on distribution of bodies that hampers further gas exploitation subsurface. Based seismic data, a large strike-slip fault system wa...

The Sa’adi Formation is a part of the late Cretaceous period in Santonian-Campanian stage that represents potential hydrocarbon-bearing reservoir across many oilfields Mesopotamian Basin, South Iraq. was divided into two main parts as stratigraphy sequence. It consists chalky limestone with argillaceous upper and marly lower part. considered an important stratigraphic unit marked by petroleum s...

Abstract The present work is based mainly on core rock samples investigation of CSS-38 well, northwest Gulf Suez, Egypt. cores cover the whole South Gharib Formation (upper Miocene). stratigraphic succession Suez includes three mega units, recorded from old to young as pre-rift, syn-rift, and post-rift sediments. syn-rift sediments are Nukhul, Rudies, Kareem, Belayim Equivalent, Gharib, Zeit. r...

this research is focused on facies distribution, palaeoecology and palaeoenvironment of the gurimember of the mishan formation in kuh-e shur and kuh-e kurdeh sections at the lar area, fars province.the guri member is composed of limestone, marly limestone and marl and the thickness at kuh-e shur andkuh-e kurdeh is about 72 and 110 meters, respectively. based on petrographical studies of 120 thi...