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渤海海域曹妃甸A构造带混积岩储层白云岩化成因机理分析

赵珂 宋章强 杜学斌 叶茂松 解习农 徐伟

赵珂, 宋章强, 杜学斌, 叶茂松, 解习农, 徐伟. 渤海海域曹妃甸A构造带混积岩储层白云岩化成因机理分析[J]. 石油实验地质, 2018, 40(2): 218-225. doi: 10.11781/sysydz201802218
引用本文: 赵珂, 宋章强, 杜学斌, 叶茂松, 解习农, 徐伟. 渤海海域曹妃甸A构造带混积岩储层白云岩化成因机理分析[J]. 石油实验地质, 2018, 40(2): 218-225. doi: 10.11781/sysydz201802218
ZHAO Ke, SONG Zhangqiang, DU Xuebin, YE Maosong, XIE Xinong, XU Wei. Dolomitization genetic mechanism of carbonate-siliciclastic mixed rock reservoir in CFD-A Tectonic Belt, Bohai Sea[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(2): 218-225. doi: 10.11781/sysydz201802218
Citation: ZHAO Ke, SONG Zhangqiang, DU Xuebin, YE Maosong, XIE Xinong, XU Wei. Dolomitization genetic mechanism of carbonate-siliciclastic mixed rock reservoir in CFD-A Tectonic Belt, Bohai Sea[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(2): 218-225. doi: 10.11781/sysydz201802218

渤海海域曹妃甸A构造带混积岩储层白云岩化成因机理分析

doi: 10.11781/sysydz201802218
基金项目: 国家自然科学基金项目(41772111)和国家重点基础研究发展计划(973计划)项目(2017CB239102)资助。
详细信息
    作者简介:

    赵珂(1993-),男,硕士研究生,海洋科学专业。E-mail:158896398@qq.com。

    通讯作者:

    宋章强(1980-),男,高级工程师,从事石油地质研究。E-mail:songzhq@cnooc.com.cn。

  • 中图分类号: TE122.221

Dolomitization genetic mechanism of carbonate-siliciclastic mixed rock reservoir in CFD-A Tectonic Belt, Bohai Sea

  • 摘要: 渤海海域曹妃甸A构造带混积岩储层主要是以生物成因碳酸盐组分为主的混积岩,多发生白云岩化。目前对该区白云岩化的成因机理研究不够,限制了对白云岩储层沉积和成岩过程的理解。通过对岩心与薄片的精细观察及描述,结合多项地球化学测试手段,对该区古近系沙河街组一、二段混积岩储层中白云岩化特征及成因机理进行研究,共识别出4种主要白云岩类型:泥晶白云岩、含生屑泥晶白云岩、生物碎屑白云岩和含砂屑生物碎屑白云岩。进一步分析发现,白云岩中碳、氧同位素均发生负偏,呈正相关关系,且氧同位素分布分散,变化大;微观照片显示只有生物碎屑及其环边胶结物发生了白云岩化,后期发育的连晶胶结和碎屑内部充填物没有被白云岩化。Mn/Fe、Sr/Ba等元素指标指示,研究区湖平面发生多次变动,导致构造带暴露遭受淡水淋滤。综合分析认为,混合水白云岩化为该区白云岩的主要成因。

     

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出版历程
  • 收稿日期:  2017-08-17
  • 修回日期:  2018-01-25
  • 刊出日期:  2018-03-28

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