东营凹陷南坡西段红层地球物理特征及储层预测
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摘要
在孔一段一沙四段下亚段沉积时期,东营凹陷南坡发育以漫湖相为主的红色碎屑岩沉积,紫红色泥岩与砂岩互层分布,并穿插多期火成岩,给红层的储层预测带来了较大困难。根据红层的地震、地质特征,对钻井揭示红层的岩性、物性、电性及速度特征等进行统计,对研究区孔一段上亚段的岩性组合及其地震反射特征进行了研究。结果表明,孔一段上亚段上部砂岩相对不发育,为泥岩与火成岩组合,强振幅反射主要对应火成岩与泥岩的界面;下部发育砂、泥岩互层穿插火成岩组合,中一高频、中一弱振幅反射主要对应砂岩与泥岩、砂岩与火成岩的界面。进而分析了对砂岩敏感的地震属性,并利用测井约束波阻抗反演与自然伽马反演相结合,较好地实现了对研究区红层储层的预测。
At the sedimentary period of the first member of Kongdian formation(Ek_1) and the lower submember of fourth member of Shahejie formation(Es_4~x),the red clastic rocks sediments,which mainly belong to sheetflood lake facies,are consisted of purple mudstone interbed sandstone and many phases igneous bodies in south slope of Dongying depression.And,it is very difficult to predict the red beds reservoir distribution.The author investigated the lithologic association and the seismic reflection characters of the upper submember of Ek_1,studied the red beds lithology,physical properties,electrical properties and velocity characters.The study shows that the mudstone and igneous rocks developed in the top of upper submember of Ek_1,and the strong amplitude reflection refers to the interface between igneous rock and mudstone.In the bottom of upper submember of Ek_1,there develops sandstone interbedded mudstone and igneous rocks.Both the difference between sandstone and mudstone and the difference between sandstone and igneous rock result in the same seismic reflection characters including the middle-high frequency and middle-weak amplitude. This paper analyzed the seismic attributes distinguishing sandstone from seismic reflection.It also indicated that the combination the acoustic impedance inversion constrained by logging data with GR inversion can predict the red beds reservoir distribution effectively.
At the sedimentary period of the first member of Kongdian formation(Ek_1) and the lower submember of fourth member of Shahejie formation(Es_4~x),the red clastic rocks sediments,which mainly belong to sheetflood lake facies,are consisted of purple mudstone interbed sandstone and many phases igneous bodies in south slope of Dongying depression.And,it is very difficult to predict the red beds reservoir distribution.The author investigated the lithologic association and the seismic reflection characters of the upper submember of Ek_1,studied the red beds lithology,physical properties,electrical properties and velocity characters.The study shows that the mudstone and igneous rocks developed in the top of upper submember of Ek_1,and the strong amplitude reflection refers to the interface between igneous rock and mudstone.In the bottom of upper submember of Ek_1,there develops sandstone interbedded mudstone and igneous rocks.Both the difference between sandstone and mudstone and the difference between sandstone and igneous rock result in the same seismic reflection characters including the middle-high frequency and middle-weak amplitude. This paper analyzed the seismic attributes distinguishing sandstone from seismic reflection.It also indicated that the combination the acoustic impedance inversion constrained by logging data with GR inversion can predict the red beds reservoir distribution effectively.
引文
[1]胥冬梅,吴明荣.博兴洼陷沙四段下亚段红层油气成藏特征及勘探潜力分析.油气地球物理,2011,9(2):44-47.
[2]杨凤,张启子.东营西部沙四下—孔店组储层测井评价.中国石化集团胜利石油管理局测井公司,2010.
[1]胥冬梅,吴明荣.博兴洼陷沙四段下亚段红层油气成藏特征及勘探潜力分析.油气地球物理,2011,9(2):44-47.
[2]杨凤,张启子.东营西部沙四下—孔店组储层测井评价.中国石化集团胜利石油管理局测井公司.2010.
[1]王秉海,钱凯.胜利油区地质研究与勘探实践[M].东营:石油大学出版社,1992:34-40.
[2]韦启新,苑小燕.我国东部油田红层沉积特征与油气成藏规律[J].石油学报,2008,29(2):191-194.
[3]陆基孟,王永刚.地震勘探原理[M].3版.东营:中国石油大学出版社,2009:139-144.
[4]刘洪文.济阳坳陷岩石密度与纵波速度的关系[J].油气地质与采收率,2008,15(6):26-28.
[5]杨晓兰,刘小平,刘彦君.稀疏脉冲反演技术在东营凹陷坨163井区沙三段储层预测中的应用[J].油气地质与采收率,2008, 15(1):53-55.
[6]王树刚,李红梅,魏文,等.东营凹陷北带深层砂砾岩体的地震预测方法[J].石油物探,2009,48(6):585-590.
[7]尹兵祥,杨剑萍,尹克敏,等.东营凹陷永安地区地震反演及储层预测[J].石油物探,2011,50(1):59-64.
[8]才巨宏.综合应用波形分析及地震特征反演技术预测滩坝砂岩——以博兴洼陷梁108地区为例[J].油气地质与采收率, 2005,12(3):42-45.
[2]杨凤,张启子.东营西部沙四下—孔店组储层测井评价.中国石化集团胜利石油管理局测井公司,2010.
[1]胥冬梅,吴明荣.博兴洼陷沙四段下亚段红层油气成藏特征及勘探潜力分析.油气地球物理,2011,9(2):44-47.
[2]杨凤,张启子.东营西部沙四下—孔店组储层测井评价.中国石化集团胜利石油管理局测井公司.2010.
[1]王秉海,钱凯.胜利油区地质研究与勘探实践[M].东营:石油大学出版社,1992:34-40.
[2]韦启新,苑小燕.我国东部油田红层沉积特征与油气成藏规律[J].石油学报,2008,29(2):191-194.
[3]陆基孟,王永刚.地震勘探原理[M].3版.东营:中国石油大学出版社,2009:139-144.
[4]刘洪文.济阳坳陷岩石密度与纵波速度的关系[J].油气地质与采收率,2008,15(6):26-28.
[5]杨晓兰,刘小平,刘彦君.稀疏脉冲反演技术在东营凹陷坨163井区沙三段储层预测中的应用[J].油气地质与采收率,2008, 15(1):53-55.
[6]王树刚,李红梅,魏文,等.东营凹陷北带深层砂砾岩体的地震预测方法[J].石油物探,2009,48(6):585-590.
[7]尹兵祥,杨剑萍,尹克敏,等.东营凹陷永安地区地震反演及储层预测[J].石油物探,2011,50(1):59-64.
[8]才巨宏.综合应用波形分析及地震特征反演技术预测滩坝砂岩——以博兴洼陷梁108地区为例[J].油气地质与采收率, 2005,12(3):42-45.
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