干旱区生态环境知识资源中心(Arid): 干旱环境河流扇概念与鄂尔多斯盆地延长组满盆砂成因新解

Arid

	干旱环境河流扇概念与鄂尔多斯盆地延长组满盆砂成因新解
其他题名	The Concept of Fluvial Fans in an Arid Environment: A new explanation of the origin of sand-filled basins in the Yanchang Formation, Ordos Basin
	李相博; 刘化清; 邓秀芹; 王雅婷; 龙礼文; 魏立花; 郝斌
来源期刊	沉积学报
ISSN	1000-0550
出版年	2021
卷号	39 期号:5 页码:1208-1221
中文摘要	河流扇是陆相盆地中近年来日益受到重视的一种新沉积模式,其主要形成于干旱气候环境中。该文阐述了河流扇的概念演变与发展由来、沉积特征、鉴别标志与控砂机理等,讨论了河流扇与分支河流体系、末端扇及浅水三角洲等相关概念之间的区别与联系,认为河流扇形成主要受分支型河道控制,而末端扇及浅水三角洲主要受分流型河道控制。在对鄂尔多斯盆地晚三叠世古气候环境深入分析的基础上,运用河流扇概念对延长组满盆砂形成机制进行了重新解释。主要结论是:1)延长组沉积时期,古气候具有三分性早期为干旱环境,中期为湿润环境,晚期再次转变为半干旱半湿润环境;2)在干旱气候环境下,缺少大面积汇水区,以洪水搬运事件沉积作用为主,形成了别具特色的河流扇体系,这可能是造成延长组满盆砂的主要原因之一;3)干旱环境河流扇砂体与潮湿环境水进域富含有机质泥岩相匹配,有利于形成大型岩性油气藏,从而使延长组由满盆含砂变为满盆含油。该研究改变了以往大型坳陷湖盆以三角洲模式为主导的传统认识,对丰富发展我国陆相盆地沉积理论认识及指导油气勘探实践均有积极意义。
英文摘要	The relatively new sedimentary model offluvial fans'has been increasingly investigated in recent years. Fluvial fans mainly form in arid climates. In the present study,the concept,sedimentary characteristics,identification signs and sand control mechanism of fluvial fans are described. It is pointed out that it is only possible to establish a sedimentary model that reflects geological reality by absorbing the recent achievements and new knowledge gained from international research on inland depression lake basins,if we are to improve the exploration success rate and promote the development of China's petroleum industry. An in-depth analysis of the paleoclimatic environment of the Upper Triassic in the Ordos Basin,adopting thefluvial fan'concept,reinterprets thesand-filled basin'development mechanism in the Yanchang Formation. The main conclusions are:(1)During the overall sedimentation of the Yanchang Formation,three paleoclimatic periods existed:an arid environment in the early stage,a humid environment in the middle stage,and a semi-arid,semi-humid environment in the late stage.(2)In the arid-climate environment,the lack of a large-scale catchment area led to flood transport sedimentation,forming a unique fluvial fan system,which may be the basic reason for thesand-filled basin'evident in the Yanchang Formation.(3)In the arid environment,the fluvial fan sand bodies correspond to the richly organic mudstones in the wet environment transgressive system tract,which is highly conducive to the formation of large-scale lithological oil and gas reservoirs,thereby changing the Yanchang Formation from a sand-filled basin to an oil-filled basin. The study has completely changed the previous understanding of alarge depression'model dominated by a delta. This theoretical re-interpretation of continental basin sedimentation has positive significance in guiding oil and gas exploration practice in China.
中文关键词	河流扇 ; 干旱环境 ; 沉积模式 ; 延长组 ; 鄂尔多斯盆地
英文关键词	fluvial fan arid environment sedimentary model Yanchang Formation Ordos Basin
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Mineralogy
CSCD记录号	CSCD:7061410
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377549
作者单位	李相博, 中国石油勘探开发研究院西北分院, 兰州, 甘肃 730020, 中国.; 刘化清, 中国石油勘探开发研究院西北分院, 兰州, 甘肃 730020, 中国.; 龙礼文, 中国石油勘探开发研究院西北分院, 兰州, 甘肃 730020, 中国.; 魏立花, 中国石油勘探开发研究院西北分院, 兰州, 甘肃 730020, 中国.; 郝斌, 中国石油勘探开发研究院西北分院, 兰州, 甘肃 730020, 中国.; 邓秀芹, 中国石油长庆油田分公司, 西安, 陕西 710018, 中国.; 王雅婷, 中国石油长庆油田分公司, 西安, 陕西 710018, 中国.
推荐引用方式 GB/T 7714	李相博,刘化清,邓秀芹,等. 干旱环境河流扇概念与鄂尔多斯盆地延长组满盆砂成因新解[J],2021,39(5):1208-1221.
APA	李相博.,刘化清.,邓秀芹.,王雅婷.,龙礼文.,...&郝斌.(2021).干旱环境河流扇概念与鄂尔多斯盆地延长组满盆砂成因新解.沉积学报,39(5),1208-1221.
MLA	李相博,et al."干旱环境河流扇概念与鄂尔多斯盆地延长组满盆砂成因新解".沉积学报 39.5(2021):1208-1221.