江汉盆地潜江凹陷潜三段盐韵律层页岩油富集机理
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  • 英文篇名:Mechanism of Shale Oil Enrichment from the Salt Cyclotherm in Qian3 Member of Qianjiang Sag,Jianghan Basin
  • 作者:李乐 ; 王自翔 ; 郑有恒 ; 陈凤玲 ; 吴世强 ; 漆智先 ; 刘爱武
  • 英文作者:Li Le;Wang Zixiang;Zheng Youheng;Chen Fengling;Wu Shiqiang;Qi Zhixian;Liu Aiwu;Exploration and Development Research Institute,SINOPEC Jianghan Oilfield Company;School of Earth Resources,China University of Geosciences;SINOPEC Jianghan Oilfield Company;Geophysical Prospecting Research Institute,SINOPEC Jianghan Oilfield Company;
  • 关键词:潜江凹陷 ; 潜三段 ; 盐韵律 ; 页岩油 ; 富集 ; 石油地质
  • 英文关键词:Qianjiang Sag;;Qian3Member;;salt cyclotherm;;shale oil;;enrichment;;petroleum geology
  • 中文刊名:DQKX
  • 英文刊名:Earth Science
  • 机构:中国石化江汉油田分公司勘探开发研究院;中国地质大学资源学院;中国石化江汉油田分公司;中国石化江汉油田分公司物探研究院;
  • 出版日期:2019-01-02 11:10
  • 出版单位:地球科学
  • 年:2019
  • 期:v.44
  • 基金:国家“十三五”科技重大专项(No.2017ZX05049005);; 中国博士后科学基金项目(No.2018M632950)
  • 语种:中文;
  • 页:DQKX201903028
  • 页数:12
  • CN:03
  • ISSN:42-1874/P
  • 分类号:334-345
摘要
针对潜江组页岩油富集机理方面的研究较为欠缺.利用岩心图像、岩石热解、镜质体反射率、生物标志化合物、干酪根显微组分鉴定、岩石物性、测井及XPT压力试井等资料对韵律层的烃源岩品质、储集性能以及保存条件进行了综合分析.从王场背斜过渡至蚌湖向斜南斜坡,韵律层干酪根类型均以Ⅰ-Ⅱ_1型为主,镜质体反射率介于0.51%~0.80%.王场背斜韵律层内岩石与底部盐岩内的夹层白云质泥岩间的C_(29)甾烷成熟度指标存在明显差异,指示存在运移油.储集岩孔隙度介于7.8%~26.3%.韵律层顶底盐岩厚度大(>6m)且横向分布稳定,沉积-埋藏期并未发生严重破裂.在保存条件及储集能力优越的基础上,同层深部运移供烃是构造高部位韵律层中页岩油富集的重要因素,而原地生烃滞留则控制着构造低部位页岩油的富集.
        Research on the shale oil enrichment mechanism of Qianjiang Formation is lacking.The data of core image,rock pyrolysis,vitrinite reflectance,biomarkers,maceral composition,rock petrophysics,well logging,and XPT well test were used to analyze the quality of source rock,reservoir property,and preservation condition in this study.The kerogens are predominantly typeⅠ-Ⅱ_1.The vitrinite reflectance ranges from 0.51% to 0.80%.The maturity indicators of C_(29) sterane in the rocks from the 1th cyclotherm in the Wangchang are obviously different from that of the underlying halite,which indicates that there are migrated oil.The porosity of the reservoir ranges from 7.8% to 26.3%.The halite layers are thick enough(>6 m)and stable throughout the area distribution;moreover,they did not break during the stage of deposition and burial.With the excellent preservation condition and storage capacity,the hydrocarbon generated from the deeper source rocks within the 10th cyclotherm controlled the shale oil enrichment in higher structural position,while hydrocarbon generated in-situ dominated in the lower structural position.
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