桑合油田都一段扇三角洲储层沉积特征

为搞清桑合油田主力层位都一段（下白垩统都红木组）的沉积特征和储层变化情况，认清油水分布规律，文中利用大量的钻井、测井和地震等资料，根据岩性分析、岩心观察和油气显示资料，对白音查干凹陷桑合油田都一段储层的沉积特征进行了研究，详细阐述了储层的岩性、沉积相类型及砂体展布特征，建立了沉积相模式，并对其含油性进行了分析。研究认为：本区主要以扇三角洲前缘沉积为主，局部存在重力流沉积。而三角洲前缘亚相水下分流河道微相的储集条件和含油性最好，是断陷湖盆油气勘探的重要区带。

Depositional characteristics of reservoirs of fan delta in Sanghe Oilfield

In order to investigate the depositional characteristics and the reservoirs transformation, recognize the oil-water distribution of the main layer, first member of Duhongmu Formation in Sanghe Oilfield, a lot of drilling, logging and seismic data were used. By petrological analysis, core observation and oil-gas show analysis and so on, depositional characteristics of reservoirs are studied. Lithological properties of the reservoirs, types of sedimentary facies and the layout properties of sandstone bodies have been elaborated. Model of sedimentary facies has been set up and the oil-bearing nature of reservoirs is analyzed. The results show that fan delta sedimentary system is mainly developed in the area with local gravity-flow deposits. The best reservoir is developed in subaqueous distributary channels of delta front subfacies, which has the best accumulation condition and best oil-bearing nature. The area is an important zone for petroleum exploration in down-faulted lake basins.