ORIGIN OF DEEP OIL ACCUMULATIONS IN RESERVOIRS WITHIN NORTH TARIM BASIN: INSIGHTS FROM MOLECULAR AND ISOTOPIC COMPOSITIONS
B. Cheng, H. Liu, Z. Cao, X. Wu and Z. Chen
Event name: 29th International Meeting on Organic Geochemistry
Session: Posters - Diamondoids
Publication date: 04 September 2019
Info: Extended abstract, PDF ( 106.32Kb )
Oils studied were not affected by evaporative fractionation process. They have not been severely cracked and probably at the beginning or early stage of intense oil cracking. Furthermore, these oils are highly mature. Calculated vitrinite reflectance of source rocks bsed on aromatic and diamondoid compounds show different ranges which might reflect multiple oil charge to the deep oil accumulations. In addition, carbon isotopic and molecular compositions indicate they are genetically related while a sample named SB7 show variations in redox condition and availablity of reactive sulfur of source rock environments.