塔南凹陷下白垩统铜钵庙组-大磨拐河组沉积相研究  

Sedimentary Facies from Tongbomiao-Damoguaihe Formation of the Lower Cretaceous in Tanan Depression

作　　者：杨子成[1] 

机构地区：[1]大庆油田有限责任公司大庆油田勘探开发研究院,黑龙江大庆163712

出　　处：《中国西部科技》2010年第18期3-6,共4页Science and Technology of West China

摘　　要：塔南凹陷下白垩统砂体沉积厚度大,分布广泛,是含油气的重要储层。根据测井、岩心观察和3D地震资料分析,认为塔南凹陷下白垩统发育扇三角洲、近岸水下扇和三角洲沉积相。其中,铜钵庙组主要发育扇三角洲沉积,根据扇三角洲的岩性、沉积层序和形态进一步划分为扇三角洲平原、扇三角洲前缘和前扇三角洲3个亚相带。南屯组发育近岸水下扇沉积,可细分为内扇、中扇和外扇三个亚相。大磨拐河组发育三角洲沉积,本区缺失三角洲平原相,只见三角洲前缘和前三角洲亚相。Sandstones of Lower Cretaceous in Tanan Depression are most important oil-bearing reservoirs. On the basis of logging, core description and 3D seismic data, fan deltas, nearshore subaqueous fan and deltas developed in Lower Cretaceous of Tanan Depression. Tongbomiao Formation developed fan deltas, fan deltas were divided into three subfacies, fan delta plain, fan delta front and pro-fan delta respectively according to lithology, sedimentary sequence and morphology. Nantun Formation developed nearshore subaqueous fan which could be divided into inner fan, middle fan and outer fan. Damoguaihe Formation developed river deltas but missed delta plain, so it only developed delta front and prodelta.

关 键 词：塔南凹陷 下白垩统 扇三角洲 近岸水下扇 三角洲 

分 类 号：P618.130.2[天文地球—矿床学]