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通过岩心观察,依据沉积相划分,结合薄片鉴定、测井、地震反射特征和物性等资料对龙湾筒凹陷沉积相特征进行研究。研究结果表明,龙湾筒凹陷主要发育三种沉积相:扇三角洲相、浊积扇相和湖泊相。综合分析认为沙海组和九佛堂组中的浊积扇扇中砂体是油气聚集的有利相带,也是滚动勘探、开发调整的方向。
Based on the core observation, the sedimentary facies characteristics of Longwangou Sag were studied based on the sedimentary facies division, the combination of thin-section identification, well logging, seismic reflection characteristics and physical properties. The results show that there are mainly three sedimentary facies in the Longwangut depression: fan delta facies, turbidite fan facies and lacustrine facies. The comprehensive analysis shows that the sand bodies in the turbidite fans in the Shahai Formation and the Jiufotang Formation are favorable facies belts for oil and gas accumulation, and are also the directions for rolling exploration and development adjustment.