白音查干凹陷桑合油田下白垩统都红木组沉积相特征

Characteristic of Sedimentary Facies in the Lower Cretaceous Duhongmu Formation of Daerqi Oilfield

根据录井、岩芯、电测、地震等资料,应用沉积学、地震、测井等沉积相划分标志,研究了白音查干凹陷桑合油田下白垩统都红木组沉积相类型和沉积特征,以及都红木组沉积相分布规律。结果表明,都红木组发育湖泊以及冲积扇相两种沉积相。从盆地边缘到盆地中心,沉积相由扇三角洲沉积渐变为半深湖—深湖相沉积。扇三角洲前缘亚相带仍然是油气聚集的重要相带,而与断层相关的前缘近岸浊积扇是岩性油气藏勘探的有利目标。

Based on mud logging, cores＇description, electric log and seismic survey, etc. The sedimentary facies＇types and their characteristics of Lower Cretaceous Tenggeer Formation, Baiyinehagan （BYCG） Depression Sanghe oilfield, were studied, as well as their distribution rule. The research showed that lacustrine environment and alluvial environment were present in the Duhongmu formation. In addition, from the margin to the depocenter of the depression, the sedimentary environments gradually changed from fan delta to middle depth lacus and deep laeus. The fronts of fan delta is still the important hydrocarbon accumulation area, and the fault-related turbidities in them are the potential targets of exploring the lithological hydrocarbon reservoirs.