辽西北票(金-羊)盆地北票组层序地层及沉积体系特征
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摘要
为揭示北票(金-羊)盆地内北票组层序地层特征及沉积体系分布规律,应用层序地层学及沉积学理论和方法,综合利用野外露头、剖面等资料,建立了北票(金-羊)盆地北票组的层序地层格架,确定研究区的沉积相类型及分布规律。研究结果表明,北票(金-羊)盆地北票组可划分为2个三级层序,其内部可进一步划分为7个准层序组。在层序内识别出冲积扇、辫状河三角洲、湖泊3个沉积相。明确了沉积相的分布规律,向上形成由冲积扇到辫状河三角洲,再到湖相,最后是辫状河三角洲的沉积体系;平面上呈近北西—南东向展布的沉积体系,整体构成2个水进、水退的沉积体系。古地貌影响了底部冲积扇相沉积物的沉积特征。气候不仅影响了沉积物类型,且和湖平面变化共同控制了沉积物的演化规律。
Sequence-stratigraphic and sedimentologic theories and methods were employed in the study of sequence stratigraphic features and sedimentary system distribution in the Beipiao Formation of the Beipiao(Jin-yang) basin. Based on comprehensive utilization of field outcrop and profile data, the authors established sequence stratigraphic framework and determined the types and distribution of sedimenatry facies. The result shows that the formation can be described as two three-order sequences,which can be divided into 7 quasi-sequence sets. Sedimentary facies comprising alluvial fans,braided river deltas and lake deposits were identified in the sequence. Depositional facies vary vertically from alluvial fans to braided river delta and then to lake facies and finally to delta. Horizontally,the facies present themselves as a nearly NW-SE-trending sedimenatry system, i.e., a sedimentary sequence comprising water transgression and regression. Paleogeomorphology controlled the sedimentary characteristics of the sediments of alluvial fans and climate affected the types of sediments and controlled the evolution pattern of the sediments in the formation.
Sequence-stratigraphic and sedimentologic theories and methods were employed in the study of sequence stratigraphic features and sedimentary system distribution in the Beipiao Formation of the Beipiao(Jin-yang) basin. Based on comprehensive utilization of field outcrop and profile data, the authors established sequence stratigraphic framework and determined the types and distribution of sedimenatry facies. The result shows that the formation can be described as two three-order sequences,which can be divided into 7 quasi-sequence sets. Sedimentary facies comprising alluvial fans,braided river deltas and lake deposits were identified in the sequence. Depositional facies vary vertically from alluvial fans to braided river delta and then to lake facies and finally to delta. Horizontally,the facies present themselves as a nearly NW-SE-trending sedimenatry system, i.e., a sedimentary sequence comprising water transgression and regression. Paleogeomorphology controlled the sedimentary characteristics of the sediments of alluvial fans and climate affected the types of sediments and controlled the evolution pattern of the sediments in the formation.
引文
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[21]卜淘,陆正元.湖泊辫状河三角洲特征、储集性及分类[J].沉积与特提斯地质,2000,20(1):78-84.
[2]顾家欲,郭杉程,张兴阳.中国陆相盆地层序地层格架及模式[J].石油勘探与研发,2005,32(5):11-15.
[3]陈林,陆永潮,邢凤存,等.鄂尔多斯盆地南部延长组层序地层特征及充填演化模式[J].中南大学学报,2015,46(6):2196-2206.
[4]孙守亮,李永飞,郜晓勇,等.辽西金羊盆地下侏罗统北票组页岩气地球化学特征及其成因[J].地质通报,2017,36(4):575-581.
[5]甄甄,李永飞,郜晓勇,等.金羊盆地SZK01井下侏罗统北票组沉积相及其有机质特征[J].世界地质,2016,35(1):207-215.
[6]张涛,李永飞,孙守亮,等.辽宁金羊盆地羊D1井油砂地球化学特征及意义[J].地质通报,2017,36(4):582-590.
[7]李永飞,陈树旺.辽西地区金岭寺-羊山盆地油气资源调查新发现[J].地质通报,2014,33(9):1463-1464.
[8]何保,李茂丰,刘颖鑫.金岭寺-羊山盆地北票组烃源岩特征[J].中国煤炭地质,2008,20(3):25-27.
[9]何保,秋萍,张亚明.辽西金羊盆地北票组烃源岩分布及有机质丰度[J].辽宁工程技术大学学报,2006,25(1):24-27.
[10]周立岱,赵明鹏.辽西金-羊盆地西缘断裂演化历史研究[J].辽宁地质,1999,16(4):249-254.
[11]闫义,林舸,李自安.辽西北票盆地侏罗系充填序列及对区域构造演化的指示[J].地质学杂志,2002,26(2):151-155.
[12]闫义,林舸,李自安,等.辽西北票(金-羊)盆地中生代砂岩碎屑组分对区域构造演化的响应[J].沉积学报,2003,21(3):441-447.
[13]王根厚,张长厚,王果胜,等.辽西地区中生代构造格局及其形成演化[J].现代地质,2001,15(1):1-7.
[14]孙守亮,李永飞,陈树旺.金羊盆地北票组沉积环境及烃源岩有机地球化学特征[J].世界地质,2017,(6):1-4.
[15]许敏,薛林福,王东坡.辽西地区中生代火山-沉积盆地群特征及成因机制[J].世界地质,1997,16(2):34-38.
[16]王立君.辽宁省北票煤盆地含煤岩系沉积环境分析[J].科技与企业,2015,(4):118.
[17]刘训.对中国东部燕山运动的一些认识[J].地质论评,1982,28(5):428-438.
[18]喻宸,吴胜和,杜文博,等.玉门油田老庙构造带白杨河组层序地层及沉积体系特征[J].石油与天然气地质,2015,36(3):437-446.
[19]于兴河.碎屑岩系油气储层沉积学(第二版)[M].北京:石油工业出版社,2008:242-263.
[20]Mcpherson J G,Shanmugan G,Moiola R J.Fan-deltas and braiddeltas:varieties of coarse-grained deltas[J].Geological Society of America Bulletin,1987,99(3):331-340.
[21]卜淘,陆正元.湖泊辫状河三角洲特征、储集性及分类[J].沉积与特提斯地质,2000,20(1):78-84.