摘要
利用高分辨率层序地层学理论和技术方法,综合测井和岩芯资料对R国K气田PF组地层海相三角洲沉积体系进行高分辨率层序地层学分析,从中识别出短期、中期、长期3个级别的基准面旋回层序,进一步分析短期旋回层序结构,划分出向上"变深"非对称型、向上"变浅"非对称型、对称型3种基本结构类型,还细分出低可容纳空间向上"变深"非对称型、高可容纳空间向上"变深"非对称型、以上升半旋回为主的不完全对称型、近完全-完全对称型和以下降半旋回为主的不完全对称型5种亚类型。并总结出海相三角洲短期旋回层序的沉积序列、叠加样式和分布模式,为PF组进一步的精细地质研究提供了依据。
On the basis of a comprehensive study of log well and core data,combined with the high resolution sequence stratigraphic theory,the marine delta sedimentary system of PF Formation from K Gas Field,in R was divided into short-term,middle-term and long-term base-level cycle,and the structure of the short-term base-level cycle could be subdivided into asymetrical:up-deepening asymetrical,up-shallowening and symmetrica basic structure types.Five subtypes of asymetical up-deepening of low accommodation and high accommodation,complete-nearly complete symmetry,incomplete symmetry with the majority of uprising semi-cycle or subsiding semi-cycle were further distinguished.Finally,the depositional array, the stacking pattern and distribution pattern of marine delta were summarized.All these studies provided valuable evidence for further meticulous studies.
出处
《矿物岩石》
CAS
CSCD
北大核心
2004年第2期88-94,共7页
Mineralogy and Petrology
关键词
珐寿砘珐聿
海相三角洲
旋回结构
叠加样式
沉积序列
气田
high-resolution sequence stratigraphy
marine delta
cycle structure
stacking pattern
depositional array
