Restoration of Paleo-Porosity of Shale within Chang 7 Member of Yanchang Formation, Jiyuan, space prefix = st1 ns = &quot;urn:schemas-microsoft-com:office:smarttags&quot; /><st1:place w:st=&quot;on&quot;><st1:PlaceName w:st=&quot;on&quot;>Ordosst1:PlaceName> <st1:PlaceType w:st=&quot;on&quot;>Basinst1:PlaceType>st1:place>

详细信息   

• 责任者：Wang Jing (Northwest Branch ; Research Institute of Exploration and Development ; PetroChina ; Lanzhou 730020 ; China) ; Liu Zhen
• 刊名：Geoscience
• 出版年：2012
• 卷期：26(2)
• 关键词：泥岩 ; mudstone ; 孔隙度 ; porosity ; 烃源岩 ; source rocks ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.384-392
• 图表：8 illus., 1 table, 28 refs.
• 分类号：1003
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

摘要

<SPAN id=EnChDivSummary name=&quot;EnDivSummary&quot;>
    

style=&quot;MARGIN: 0cm 0cm 0pt&quot; class=MsoNormal>///t;EnDivSummary&quot;>The shale within Chang 7 Member of Yanchang Formation in Triassic is an important source rock of Mesozoic reservoirs in space prefix = st1 ns = &quot;urn:schemas-microsoft-com:office:smarttags&quot; /><st1:place w:st=&quot;on&quot;><st1:PlaceName w:st=&quot;on&quot;>Ordosst1:PlaceName> <st1:PlaceType w:st=&quot;on&quot;>Basinst1:PlaceType>st1:place>. The paleo-pressure in the period of accumulation plays a vital role for the hydrocarbon migration, and the changes of paleo-porosity represent the characteristics of the paleo-pressure evolution. Through analyzing the characteristics of present shale compaction profiles, there is an exponent relationship between the porosity increment and the maximum depth of undercompacted shale within Chang 7 Member. Then by using this relationship, the increment of shale porosity in the period of accumulation can be extrapolated and by combining the porosity of normal compaction trend, the total porosity of undercompacted shale within Chang 7 Member in the period of accumulation can be restored effectively.