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Characteristics and formation mode of Es3 Member pyrite in Wendong Area of Dongpu Depression
Author(s): Wang Xiaojie, Zhang Shiqi, Wei Mengji, Mu Xiaoshui, Xu Tianwu
Pages: 178-
183
Year: 2015
Issue:
2
Journal: Fault-Block Oil and Gas Field
Keyword: pyrite; sedimentary environment; diagenesis environment; formation mode; Wendong Area; Dongpu Depression;
Abstract: 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.
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