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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。
According to logging, core, electrical measurement and seismic data, sedimentary facies, seismology and logging data are used to study the sedimentary facies types and sedimentary characteristics of the Lower Cretaceous Mogu Formation in the Sanghe oilfield, Baiyinchagan depression , As well as the sedimentary facies of mahogany group. The results show that both of the mahogany groups have two types of sedimentary facies, lacustrine and alluvial fan facies. From the margin of the basin to the center of the basin, the sedimentary facies is gradually altered from fan delta to semi-deep lake-deep lake facies. The fan delta front subfacies are still the important facies of oil and gas accumulation, and the fault-related front nearshore turbidite fan is a favorable target for lithologic reservoir exploration.