天然气地球科学

• 天然气地质学 • 上一篇    下一篇

鄂尔多斯盆地南部三叠系延长组有机流体活动期次划分

杨超,贺永红,马芳侠,雷裕红,陈义国   

  1. 1.陕西延长石油(集团)有限责任公司研究院,陕西 西安 710065;
    2.中国科学院地质与地球物理研究所,北京 100029
  • 收稿日期:2018-01-22 修回日期:2018-04-18 出版日期:2018-05-10 发布日期:2018-05-10
  • 作者简介:杨超(1979-),男,山东单县人,高级工程师,博士,主要从事油气勘探研究.E-mail:haozhaoli1@163.com.
  • 基金资助:

    国家科技重大专项(编号:2017ZX05008-004)资助.

Organic fluid activity times of Yanchang Formation in the southern Ordos Basin

Yang Chao,He Yong-hong,Ma Fang-xia,Lei Yu-hong,Chen Yi-guo   

  1. 1.Research Institute of Shaanxi Yanchang Petroleum (Group) Co.,Ltd.,Xi’an 710065,China
    2.Institute of Geology and Geophysics,CAS,Beijing 100029,China
  • Received:2018-01-22 Revised:2018-04-18 Online:2018-05-10 Published:2018-05-10

摘要:

       通过对孔隙沥青荧光特征和包裹体荧光光谱特征观察,结合包裹体均一温度分析,对鄂尔多斯盆地南部三叠系延长组有机流体活动期次进行了详细的研究,认为研究区孔隙沥青中炭质沥青形成的时间最早,通常占据较大的粒间孔隙、部分粒内溶蚀孔隙和部分成岩裂缝;橙—黄色荧光的孔隙沥青,其形成的时间晚于炭质沥青,通常与填隙物一起充填剩余粒间孔隙、粒内溶蚀孔隙、部分构造裂缝和部分石英愈合缝内;蓝—白色荧光的孔隙沥青形成时间最晚,对前2类孔隙沥青进行改造,赋存于剩余孔隙和绝大部分的石英愈合缝。通过对不同荧光的有机流体包裹体进行定量荧光光谱分析、流体包裹体测温数据和地层埋藏史的研究,认为第一期充注的原油被氧化破坏形成黑色炭质沥青,发生在侏罗纪末,地层温度约为65~70℃;第二期为橙—黄色荧光沥青代表的原油充注,发生在早白垩世早中期,对应的地层温度约为90~100℃;第三期为蓝—白色荧光沥青代表的原油充注,发生在早白垩世晚期,地层温度约为110~120℃。

 

关键词: 鄂尔多斯盆地南部, 延长组, 流体包裹体, 有机流体活动, 荧光

Abstract:

Based on observation of porous asphalt fluorescence and inclusions fluorescence spectrum,and analysis of inclusions homogenization temperature,the organic fluid activity of Yanchang Formation in southern Ordos Basin was studied.The results show that the porous asphalt carbonaceous bitumen formed in the earliest time,which often occupied large part of intergranular pore and intragranular dissolution pores and part of the diagenetic fracture.Porous asphalt with orange-yellow fluorescence,whose formation time is later than the carbonaceous bitumen,together with the filling materials,usually fills the residual intergranular pore and intragranular dissolution pores,and most of the structural cracks and quartz joints.The blue-white fluorescent asphalt is formed at the latest time,and modified two types of pore asphalt,which deposited in the remaining pores and most of the quartz healing joints.Based on different fluorescence quantitative fluorescence spectrum analysis of organic fluid inclusions,fluid parcel cervix temperature data and stratigraphic burial history research,results show that the first phase of charged oil was oxidized and damaged into black carbonaceous bitumen,which occurred in the end of Jurassic,with formation temperature of 65-70℃.The second stage oil charge was characterized by the orange-yellow fluorescence asphalt,which occurred in the Middle Cretaceous,with formation temperature of 90-100℃.The third stage oil charge was characterized by the blue-white fluorescent asphalt,which occurred in the Late stage of Early cretaceous,with formation temperature of 110-120℃.

Key words: Sothern Ordos Basin, Yanchang Formation, Fluid inclusion, Organic fluid activity, Fluorescent

中图分类号: 

  • TE122.3

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