摘要
针对苏德尔特地区南屯组时期的层序划分研究精度不够的问题,利用钻井、测井和地震等方面的资料,开展了南屯组的高分辨率层序划分对比方式以及基准面升降对沉积的控制作用研究。结果表明:研究区南屯组共可划分为3个长期旋回和12个中期旋回,主要发育扇三角洲和湖泊沉积体系;南屯组下部LSC1时期共经历了基准面缓慢上升、快速上升、升降转换、缓慢下降以及快速下降5个阶段,扇体的展布规模随基准面升降变化表现为先减小后增大的特征,湖泊分布范围则相反、呈先增大后减小的变化规律;长期旋回上升前期(MSC1、MSC2)与下降后期(MSC5)内水下分流河道砂体较发育,是优质的油气储集体,MSC3为南屯组内的最大湖泛期,暗色泥岩广泛发育,是优质的烃源岩层,源储上下紧邻,成藏条件优越,具较大的勘探潜力。
For the problem of the low-precision study on the sequence division at Nantun Formation stage in Sudeerte area,with the help of the drilling, logging and seismic data, the high-resolution sequence division and correlation methods of Nantun Formation and the controlling action of the base level rise-fall on the sedimentation were studied in Sudeerte structural belt of Beier Sag in Hailar Basin. The results show that Nantun Formation can be divided into three long-term cycles and twelve medium-term cycles with mainly well-developed fan delta and lake sedimentary system;during Period LSC1 Lower Nantun Formation,the study area has experienced five stages:slow rise, rapid rise, rise-fall conversion, slow decline and rapid decline of the long-term base level,the distribution scales of the fan body decrease first then increase with the rise-fall of the datum level, while the change laws of the lake body are just on the contrary;the underwater distributary channel sandbodies in the early long-term-cycle rise stage (MSC1, MSC2) and the late stage of the fall (MSC5) are well developed, so they are high-quality oil and gas reservoirs,MSC3 is the largest lake-flooding period in Nantun Formation, the dark mudstone is widely developed and becomes high-quality hydrocarbon source rock,the sources and reservoirs are close to each other and the reservoir-accumulating conditions are superior, so they have great exploration potential.
作者
王志强
刘波
胡忠益
王旭
李军辉
WANG Zhiqiang;LIU Bo;HU Zhongyi;WANG Xu;LI Junhui(Exploration and Development Research Institute of Daqing Oilfield Co Ltd.,Daqing 163712, China;Daqing No.1 Geophysical Exploration Company of BGP, Daqing 163357, China;Research Institute of Drilling Technique,Drilling Engineering Company of Daqing Oilfield Co Ltd., Daqing 163413,China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2019年第4期7-14,共8页
Petroleum Geology & Oilfield Development in Daqing
基金
中国石油天然气股份公司重大科技专项“大庆油田持续有效发展关键技术研究与应用”(2016E-0202)
关键词
层序地层格架
沉积体系
高分辨率
苏德尔特
南屯组
基准面
旋回
源储分布
sequence stratigraphic framework
sedimentary system
high resolution
Sudeerte
Nantun Formation
base level
cycle
source-reservoir distribution
