摘要
针对浅水三角洲亚相间存在渐变带,难以准确标定分界线位置,无法满足油田开发需求的问题,在浅水三角洲沉积水动力研究理论的指导下,以达到明确区分各沉积亚相为目的,充分利用取心井岩心资料及密井网测井资料,并进行指相标志平面演变分析,建立了沉积亚相识别标志。分流平原表现为陆上河流作用沉积特征,内前缘以水下分流河道与席状砂组合为沉积特征,外前缘以连片薄层席状砂为特征。制定了"岩心定区、微相定位"的亚相分界线标定方法,实现了沉积亚相的合理界定,为油层分类、储量计算及开发规划等工作奠定了坚实的基础。
In view of the gradual change zone between the sub phases of shallow water delta,it is difficult to demarcate accurately the boundary position and meet the demand for oilfield development.In order to achieve the purpose of demarcate accurately sedimentary facies,according to sedimentary dynamics theory of shallow water delta,the identification sign of sedimentary facies is established by making use of the data of core analysis and well⁃logging of dense well pattern,and analyzing the plane evolution of facies indicator.Distributary plain is characterized by onshore stream sedimentation,inner front surfaces is characterized by combination of underwater distributary channel and sheet sand,outer front surfaces is characterized by contiguous thin sheet sand.The method of dividing facies belt boundary of"core locating and microfacies locating"has been established,and the reasonable definition of sedimentary facies zones is realized,which has laid a solid foundation for reservoir classification,reserves calculation and development planning.
作者
王加强
Wang Jiaqiang(Exploration and Development Research Institute of Daqing Oilfield Company,Daqing Heilongjiang 163712,China)
出处
《石油化工高等学校学报》
CAS
2020年第1期75-80,共6页
Journal of Petrochemical Universities
基金
国家科技重大专项“薄差油层地质特征研究”(2016ZX05010002-003)
关键词
浅水三角洲
喇萨杏地区PⅠ组
沉积相划分
Shallow water delta
PI formation in La⁃Sa⁃Xing area
Sedimentary facies division
