摘要
随着合水地区致密油藏的深入勘探与开发,现有的沉积成因分类已不足以支撑重力流类型的准确划分。为了进一步细分沉积成因类型,以便实现重力流类型的准确划分,通过构型要素分析的方法对合水地区长7段的重力流沉积微相进行了精细刻画。研究认为,合水地区长7段主要发育深水重力流沉积体系,可划分为内扇、中扇和外扇3种沉积亚相。在内扇亚相,发育近源限制性水道沉积微相;在中扇亚相,发育远源水道和溢岸沉积微相;在外扇亚相,发育浊积朵叶体微相。
With the exploration and development of tight oil in Heshui area,the existing sedimentary genetic classification is not enough to support the accurate division of gravity flow types.In order to further subdivide the sedimentary genetic types and realize the accurate division of gravity flow types,the gravity flow sedimentary micro-facies of Chang 7 member in Heshui Area are finely characterized by the method of configuration element analysis.The results show that the deep-water gravity flow sedimentary system is mainly developed in Chang 7 section of Heshui area,which can be divided into three types of sedimentary sub-phases:inner fan,middle fan and outer fan.Among them:inner fan sub-facies,near source restricted channel sedimentary micro-facies are developed;in the middle fan sub-facies,distal channel and overflow bank sedimentary micro-facies are developed;in the outer fan sub-facies,turbidite lobular micro-facies are developed.
作者
常梁杰
庞军刚
王欣月
CHANG Liangjie;PANG Jungang;WANG Xinyue(School of Earth Science and Engineering,Xi′an Shiyou University,Xi′an 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi′an 710065,China)
出处
《重庆科技学院学报（自然科学版）》
CAS
2022年第2期23-30,共8页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
“十三五”国家科技重大专项“中生界低渗透储层非均质性评价技术”(2016ZX05050006)
西安石油大学研究生创新与实践能力培养计划资助项目“鄂尔多斯盆地延长组异重岩描述及其识别标志”(YCS19213079)。
关键词
合水地区
长7段
重力流
构型要素
沉积微相
沉积模式
Heshui area
Chang 7 member
gravity flow
configuration elements
sedimentary micro-facies
depositional models
