黄骅坳陷沙一段物源分析及地质意义
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摘要
黄骅坳陷不同区块的勘探程度相差较大,从整体出发分析物源对确定湖盆内沉积体系的展布显得十分重要。应用数理统计的方法,结合重矿物组分、碎屑组分、石英含量、砂岩厚度及含量和地震反射结构等资料对黄骅坳陷沙一段的物源方向进行了综合分析,并据此预测了沉积体系的类型和展布特征。结果表明,黄骅坳陷沙一段存在北部、东部、西北部、西部和东南部5个物源区,其中北部和西部为主要物源区,北部物源对南部地区的影响较大。根据物源及多种资料综合分析,沙一段存在7类沉积体系,多期多物源继承性发育的砂体广泛分布,以近岸水下扇、辫状河三角洲、三角洲、重力流、滑塌浊积扇和滨浅湖滩坝砂体为主要储集体类型。离物源区最远的三角洲水下分流河道和河口坝砂岩储集物性最好,其次为辫状河三角洲水下分流河道和河口坝砂体,重力流及近岸水下扇离物源区最近,储集物性最差。
Exploration degree in the different blocks of Huanghua Depression has large difference so that systematic analysis of the sediment provenance is very important for the definition of the distribution of sedimentary facies in a lacustrine basin. Comprehensive research on provenance has been made with the application of mathematical statistics methods,combined with analysis of heavy mineral component,detrituscomponent,quartz content,thickness and content of sandstones,and seismic reflection structure of the first member of Shahejie Formation( Es1 ) in Huanghua Depression. Distribution features of sedimentary system were forecasted based on the provenance. There are five provenance areas in Es1 formation,namely north area,east area,northwest area,west area and southeast area ,of which the north area and west areaare the dominant ones. The south sedimentary area is influenced partly by the north provenance area. According to the comprehensive interpretation from provenance analysis and other analysis of sedimentary facies,seven depositional systems were defined in Es1 formation,inwhich multi-period,multi-provenance and successive sand bodies developed widely and deposited primarily in nearshore subaqueous fans,braided deltas,deltas,gravity flow,slump turbidite fans and beach-bar in shore-shallow lake. The physical property of the sandstones of underwater distributary channel and mouth bar of delta far from the provenance is the most favorable,and that of the sandstones of underwaterdistributary channel and mouth bar of braided deltas is suboptimal. The sandstones of gravity flow and offshore subsea apron nearest from theprovenance have the lowest value of physical property.
Exploration degree in the different blocks of Huanghua Depression has large difference so that systematic analysis of the sediment provenance is very important for the definition of the distribution of sedimentary facies in a lacustrine basin. Comprehensive research on provenance has been made with the application of mathematical statistics methods,combined with analysis of heavy mineral component,detrituscomponent,quartz content,thickness and content of sandstones,and seismic reflection structure of the first member of Shahejie Formation( Es1 ) in Huanghua Depression. Distribution features of sedimentary system were forecasted based on the provenance. There are five provenance areas in Es1 formation,namely north area,east area,northwest area,west area and southeast area ,of which the north area and west areaare the dominant ones. The south sedimentary area is influenced partly by the north provenance area. According to the comprehensive interpretation from provenance analysis and other analysis of sedimentary facies,seven depositional systems were defined in Es1 formation,inwhich multi-period,multi-provenance and successive sand bodies developed widely and deposited primarily in nearshore subaqueous fans,braided deltas,deltas,gravity flow,slump turbidite fans and beach-bar in shore-shallow lake. The physical property of the sandstones of underwater distributary channel and mouth bar of delta far from the provenance is the most favorable,and that of the sandstones of underwaterdistributary channel and mouth bar of braided deltas is suboptimal. The sandstones of gravity flow and offshore subsea apron nearest from theprovenance have the lowest value of physical property.
引文
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[19]刘锐娥,黄月明,卫孝锋,等.鄂尔多斯盆地北部晚古生代物源区分析及其地质意义[J].矿物岩石,2003,23(3):82-86.
[20]蔺宏斌,侯明才,陈洪德,等.鄂尔多斯盆地苏里格气田北部下二叠统山1段和盒8段物源分析及其地质意义[J].地质通报,2009,28(4):483-492.
[21]金振奎,邹元荣,张响响,等.黄骅坳陷古近系沙河街组湖泊碳酸盐沉积相[J].古地理学报,2002,4(3):11-18.
[2]范乐元,朱筱敏,宋琨,等.黄骅坳陷北大港构造带古近系沙河街组高分辨率层序地层格架及其对储层非均质性的控制[J].地层学杂志,2005,29(4):354-361.
[3]宋琨,范乐元,朱文春,等.黄骅坳陷北大港构造带古近系沙河街组层序地层框架和岩相古地理研究[J].西安石油大学学报:自然科学版,2006,21(5):24-28.
[4]陈纯芳,郑浚茂,王德发.板桥凹陷沙三段沉积体系与物源分析[J].古地理学报,2001,3(1):55-62.
[5]石世革.黄骅坳陷板桥凹陷古近系沙一段中部层序地层学研究与岩性油气藏勘探[J].石油与天然气地质,2008,29(3):320-325.
[6]严德天,王华,王家豪,等.黄骅坳陷沙河街组层序地层样式及隐蔽圈闭预测[J].中国矿业大学学报,2008,37(1):30-37.
[7]黄传炎,王华,王家豪,等.板桥凹陷断控重力流沉积特征及沉积模式[J].油气地质与采收率,2007,14(6):14-16.
[8]Renata C,Sulovsky P,Bruce A P.Major and trace elements in py-rope almandine garnets as sediment provenance indicators of the Lower Carboniferous Culm sediments,Drahany Uplands,Bohemian Massif[J].Lithos,2005,82(1/2):51-70.
[9]谢风猛,王国光,贾光华,等.东营凹陷王58井区沙四段上亚段纯上5砂组物源方向分析[J].油气地质与采收率,2007,14(3):38-40,45.
[10]朱筱敏.沉积岩石学[M].北京:石油工业出版社,2008.
[11]刘东娜.碎屑物源分析泛论[J].科技情报开发与经济,2007,17(8):171-173.
[12]Moral Cardona J P,Gutirrez Mas J M,Snchez Belln A,et al.Surface textures of heavy-mineral grains:A new contribution to provenance studies[J].Sedimentary Geology,2005,174(3/4):223-235.
[13]Morton A C,Whitham A G,Fanning C M.Provenance of Late Cre-taceous to Paleocene submarine fan sandstones in the Norwegian Sea:Integration of heavy mineral,mineral chemical and zircon age data[J].Sedimentary Geology,2005,182(1/4):3-28.
[14]徐田武,宋海强,范卫平,等.高邮凹陷晚白垩世泰一段沉积时期物源及沉积相定量分析[J].油气地质与采收率,2008,15(6):29-31,38.
[15]吴小斌,孙卫,王进军.鄂尔多斯盆地陇东地区延长组的物源分析[J].沉积与特提斯地质,2008,28(4):57-61.
[16]徐亚军,杜远生,杨江海.沉积物物源分析研究进展[J].地质科技情报,2007,26(3):26-32.
[17]张琴,张满郎,朱筱敏,等.准噶尔盆地阜东斜坡区侏罗纪物源分析[J].新疆石油地质,1999,20(6):501-504.
[18]张金伟,王军,吴明荣.利用地震前积反射特征确定古水流方向的沉积几何方法[J].油气地质与采收率,2008,15(5):53-55.
[19]刘锐娥,黄月明,卫孝锋,等.鄂尔多斯盆地北部晚古生代物源区分析及其地质意义[J].矿物岩石,2003,23(3):82-86.
[20]蔺宏斌,侯明才,陈洪德,等.鄂尔多斯盆地苏里格气田北部下二叠统山1段和盒8段物源分析及其地质意义[J].地质通报,2009,28(4):483-492.
[21]金振奎,邹元荣,张响响,等.黄骅坳陷古近系沙河街组湖泊碳酸盐沉积相[J].古地理学报,2002,4(3):11-18.
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