摘要
东濮凹陷文东地区沙三段储层黄铁矿分布广泛,其形成与储层的沉积、成岩环境密切相关。文中利用岩心、铸体薄片,以及测、录井资料,结合储层性质及沉积、成岩作用研究,对研究区沙三段储层中黄铁矿的形成过程、影响因素及其所反映的环境进行了探讨。通过观察研究,将储层中的黄铁矿划分为早期和晚期2种类型,其形成时间和机制有所不同。黄铁矿在储层中的发育与分布,受膏盐岩发育状况、烃类活动及储层缝隙等因素的影响。对不同期黄铁矿的研究,能够辅助判断原始沉积环境,以及研究储层的流体活动。
Pyrite widely distributes in Es3 Member sandstone reservoir in Wendong Area of Dongpu Depression.It is an important mineral and its formation is closely related to the sedimentary and diagenesis environment of reservoir.Based on the logging data,observations of cores and cast thin sections,and combined with the study of sedimentation,diagenasis and reservoir properties,this paper discusses the forming process of pyrite,controlling factors and environment reflected by pyrite.Through observation,the pyrite in study area can be divided into two types,namely early pyrite and late pyrite,whose forming time and mechanism are different.The development and distribution of pyrite in reservoir are influenced by the development of gypsum-salt rocks,hydrocarbon activity and the development of fractures.Research on different pyrites can also help to identify initial sedimentary environment and to study fluid activity in the reservoirs.
出处
《断块油气田》
CAS
北大核心
2015年第2期178-183,共6页
Fault-Block Oil & Gas Field
基金
国家科技重大专项课题"东濮凹陷油气富集规律与增储领域"(2011ZX05006-004)
中央高校科研专项资金项目"陆相含盐盆地深层有效储层形成机制研究"(10CX04009A)
关键词
黄铁矿
沉积环境
成岩环境
形成模式
文东地区
东濮凹陷
pyrite
sedimentary environment
diagenesis environment
formation mode
Wendong Area
Dongpu Depression
