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渤海湾盆地济阳坳陷沾化凹陷L69井古近系沙三下亚段取心段页岩油勘探有利层段
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  • 英文篇名:Favorable interval for shale oil prospecting in coring Well L69 in the Paleogene Es~(3L) in Zhanhua Sag,Jiyang Depression,Bohai Bay Basin
  • 作者:李志明 ; 陶国亮 ; 黎茂稳 ; 蒋启贵 ; 曹婷婷 ; 刘鹏 ; 钱门辉 ; 谢小敏 ; 李政
  • 英文作者:Li Zhiming;Tao Guoliang;Li Maowen;Jiang Qigui;Cao Tingting;Liu Peng;Qian Menhui;Xie Xiaomin;Li Zheng;Wuxi Research Institute of Petroleum Geology,Petroleum Exploration and Production Research Institute,SINOPEC;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development;State Energy Center for Shale Oil Research and Development;Research Institute of Exploration and Development of Shengli Oilfield Branch Company,SINOPEC;
  • 关键词:含油性 ; 赋存形式 ; 页岩油 ; 沙河街组 ; 沾化凹陷 ; 渤海湾盆地
  • 英文关键词:oil content;;occurrence;;shale oil;;Shahejie Formation;;Zhanhua Sag;;Bohai Bay Basin
  • 中文刊名:SYYT
  • 英文刊名:Oil & Gas Geology
  • 机构:中国石化石油勘探开发研究院无锡石油地质研究所;页岩油气富集机理与有效开发国家重点实验室;国家能源页岩油研发中心;中国石化胜利油田分公司勘探开发研究院;
  • 出版日期:2019-01-10 10:29
  • 出版单位:石油与天然气地质
  • 年:2019
  • 期:v.40
  • 基金:国家科技重大专项(2017ZX05049-001)
  • 语种:中文;
  • 页:SYYT201902004
  • 页数:12
  • CN:02
  • ISSN:11-4820/TE
  • 分类号:26-37
摘要
为探讨渤海湾盆地济阳坳陷沾化凹陷L69井沙河街组三段下亚段(沙三下亚段)取心段页岩油勘探有利层段,对L69井沙三下亚段取心段典型岩相样品和获工业页岩油产量的XYS9井沙三下亚段取心段典型岩相样品,开展了常规热解和多温阶热释法分析,对比研究其含油性与不同赋存形式油含量特征,结合其他影响页岩油产量的因素综合评价页岩油勘探有利层段。结果表明:L69井埋深3 040. 35~3 072. 10 m富有机质纹层状泥质灰岩段,其游离油总量尤其是轻烃校正后游离油S1-1含量显著低于获工业页岩油产量的XYS9井沙三下亚段的含量,并且油饱和指数(OSI)均值仅为67 mg/g,不具有页岩油勘探潜力;埋深3 116. 90~3 126. 70 m含有机质纹层状泥质灰岩段,虽其油饱和指数(OSI)均在100 mg/g以上,平均达204 mg/g(样品数n=8),但游离油总量和轻烃校正后游离油S1-1含量显著低于获工业页岩油产量的XYS9井沙三下亚段的含量,页岩油勘探潜力较低;埋深2 994. 10~3 010. 90 m富有机质层状泥质灰岩、灰质泥岩段,其游离油总量尤其是轻烃校正后游离油S1-1含量和油饱和指数(OSI),与获工业页岩油产量的XYS9井沙三下亚段的含量基本相近或相等,并且该层段微裂缝发育、具异常压力、脆性矿物含量高和存在成熟运移油的贡献,为页岩油勘探的有利层段。
        This paper aims to identify the favorable interval for shale oil prospecting in the cored interval of the lower section of the third member of the Shahejie Formation( Es3 L) from Well L69 in Zhanhua Sag,Jiyang Depression,Bohai Bay Basin. To study their oil content and occurrence,typical lithofacies samples from the cored intervals of Es3 Lin wells with commercial shale oil production,Well L69 and Well XYS9,were comparatively analyzed with routine Rock-Eval pyrolysis method and thermal desorption method,and the favorable interval for shale oil prospecting and factors affecting shale oil production were assessed. Results show that the total content of free oil,especially the content of free oil S1-1 after light hydrocarbon correction,for the organic-rich lamellar argillaceous limestones at a depth of 3 040. 35 m to 3 072. 10 m in Well L69,is obviously lower than that of cored interval with commercial shale oil production in Well XYS9,and the average Oil Saturation Index( OSI) is only 67 mg/g,both of which indicate no exploration potential for shale oil. The totalcontent of free oil,especially the content of free oil S1-1 after light hydrocarbon correction,for organic-rich lamellar argillaceous limestones at a depth of 3 116. 90 m to 3 126. 70 m in Well L69,is obviously lower than that of cored interval of the Es3( L)with commercial shale oil production from Well XYS9,though the OSIs are usually larger than 100 mg/g with an average of 204 mg/g,suggesting a lower shale oil exploration potential. The total content of free oil,especially the content of free oil S1-1 after light hydrocarbon correction,and the OSI of organic-rich laminar argillaceous limestones and calcareous mudstones at a depth of 2 994. 10 m to 3 010. 90 m in Well XYS9,are similar or almost equal to those of the cored interval of the Es3( L)with commercial shale oil production from Well XYS9; characterized by developed micro-fractures,abnormal pressure,high contents of brittle minerals and contribution of mature oil migration,the cored interval at the depth of 2 994. 10 m to 3 010. 90 m should be a favorable interval for shale oil exploration.
引文
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