SK-1井下白垩统泉头组米级旋回研究  

Study on meter-scale cycles of the Lower Cretaceous Quantou Formation in SK-1 well

作　　者：郭娟娟[1] 吴欣松[2] 潘建国[1] 魏东涛[1] 付建伟[2] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020 [2]中国石油大学(北京)资源与信息学院,北京102249

出　　处：《岩性油气藏》2012年第6期38-42,共5页Lithologic Reservoirs

基　　金：国家重点基础研究发展计划“973”项目“白垩纪地球表层系统重大地质事件与温室气候变化”(编号:2006CB701403)资助

摘　　要：通过对SK-1井泉头组岩心的详细观察与描述,并结合测井曲线特征,开展了泉头组沉积微相的识别,并在此基础上,划分了Ⅲ级、Ⅳ级、Ⅴ级及米级旋回。通过对所划分的旋回地层进行Fischer图解分析,建立了反映泉头组地层叠置关系的旋回地层格架。利用测井谱分析,结合前人分析测试得到的松辽盆地泉头组的绝对年龄,对各级旋回进行周期计算,发现Ⅴ级旋回周期约为112ka,Ⅳ级旋回周期约为379ka,分别与米兰科维奇偏心率短周期85～140ka和长周期350～400ka相对应,从而表明SK-1井旋回地层的形成受米兰科维奇旋回的控制。此研究结果为早白垩世气候变化对旋回地层的影响研究提供了科学依据。Based on the data of core and well logging of SK-1 well,this paper carried out the sedimentary microfacies identification,and divided cycle into third-order,fourth-order,fifth-order and meter-scale cycles.According to the cyclic sequence,this paper carried out the Fischer graphic analysis,and established cyclic stratigraphic framework.The absolute age ofQuantou Formation in SongliaoBasin was obtained by usingwell logging spectral analysis,and the cycle times were estimated.The result shows that the fifth-order cycle is 112 ka and fourth-order cycle is 379 ka,which is separately corresponding toMilankovitch eccentricity short circle 85～140 ka and Milankovitch eccentricity long circle 350～400 ka.The results coincide with the result of logging.This further illustrates that the forming of cycle sequence formation is controlled byMilankovitch cycle,which provides scientific foundation for the test of influencing factors of climate change in Cretaceous period.

关 键 词：旋回地层学 沉积相 米级旋回 米兰科维奇周期 松辽盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探]