干旱区生态环境知识资源中心(Arid): 应用天文地层学方法对山东昌潍北部新生代不整合时间和剥蚀量的计算及其意义

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	应用天文地层学方法对山东昌潍北部新生代不整合时间和剥蚀量的计算及其意义
其他题名	ESTIMATE OF UNCONFORMITY TIME GAPS AND DENUDATION USING CENOZOIC ASTROSTRATIGRAPHIC DATA FROM NORTHERN CHANGWEI OF SHANDONG PROVINCE
	李文涛
来源期刊	地层学杂志
ISSN	0253-4959
出版年	2010
卷号	34 期号:3 页码:268-282
中文摘要	为进一步推动山东昌潍北部地区的新生代油气勘探,应用潍北,牛头镇和侯镇等3个凹陷9个层段的天文地层年龄分析,计算出新生代不整合时间和剥蚀量.天文地层学计算方法主要包括:地层分层,测井频谱分析,寻找40万年周期和旋回的对比.得到结果:孔三段-孔二段界线的年龄为61.819Ma,孔二段-孔一段界线的年龄为54.638Ma,孔一段-沙四下亚段界线的年龄为48.448Ma,沙四下-沙四上亚段界线的年龄为43.516Ma,沙四上亚段顶的年龄为40.362Ma,馆陶组-明化镇组界线的年龄大约为35.77831.896Ma.通过剥蚀的时间和沉积环境的分析提出如下观点:1)大约在48.448Ma以前,昌潍坳陷北部的沉积是全盆地的,稳定的,其中包括:约长达4Myr期间孔三段断断续续出现玄武岩喷发,大约7Myr时间内孔二段出现沼泽和浅湖相的沉积,约6Myr时间内孔一段主要为干旱相的小水塘,水坑"红色"沉积;2)从沙河街组开始(48.448Ma)至东营组末(23.03Ma)期间,也即大约25Myr期间,潍北的昌参1,昌1等井的中心部位,仍然是不断下陷,沉积;3)馆陶组沉积期间(大约23.0313Ma)盆地全区上升.因此在大约10Myr的剥蚀时间过程中,不仅没有沉积,而把原沉积的沙三亚段至东营组不断’反剥’到沙四段下部;4)馆陶组末(大约13Ma)到明化镇组顶(2.588Ma)沉积期间,全区开始以河流泛滥平原相为主的泥岩和泥质粉细砂岩的沉积,形成盖层.根据天文地层方法的剥蚀量计算,潍北凹陷中有3个"反剥高点".这些"反剥高点"在始新世末至渐新世的沉积和构造上升和剥蚀过程中,可能造成砂岩回弹和孔隙扩张,形成好的储集区.根据计算,最大的"反剥高点"是在昌36央5昌8井一带,剥蚀厚度约达18003000m,与多年油田勘探取得成果是一致的
英文摘要	Cenozoic unconformity time gaps and denudation in northern Changwei of Shandong Province was estimated using astrostratigraphic methods based on data from 9 formations in the Niutouzhen, Houzhen and Weibei sags in the Changwei depression. Astrogeologic research methods applied in this paper include stratigraphic division, spectrum analysis based on logging data, and recognition and correlation of 400,000-year cycles. The age of main formation boundaries was calculated as follow: Ek3Ek2 boundary is 61.819 Ma, Ek2Ek1 boundary is 54.638 Ma, Ek1 Es4L boundary is 48.448 Ma, Es4L Es4U boundary is 43.516 Ma, top boundary of Es4 U is 40.632 Ma, the boundary between the Guantao Formation and Minghuazhen Formation is about 35.778-31.896 Ma. On the basis of denudation time and sedimentary environmental analysis, the following conclusions were arrived : 1) The sedimentation of Eogene formation in the northern Changwei depression was basin wide and stable before 48.448 Ma. During the sedimentation of Ek3 there were basalt eruptions lasting 4 Myr; Ek2 (lasting approximately 7 Ma) is featured by swamp and shallow lake sedimentation, Ek1 (lasting approximately 6 Ma) is featured by red colored sediment deposited in arid lacustrine environments. 2) From 48.448 Ma (the Shahejie Formation) to 23.03 Ma(the Dongying Formation), sedimentation and subsidence continued, particularly in the central Weibei sag where Changcan 1 well and Chang 1 well are located. 3) The study area uplifted from 23.3 Ma to 12 Ma(the Guantao Formation). During 10 million years of denudation, deposits laid down in the Es3-Dongying Formation were eroded and incorporated in the lower Es4 Formation. 4) From 13 Ma (the upper Guantao Formation) to2.588 Ma (the upper Minghuazhen Formation), mudstone and fine siltstone were laid down, forming a cap rock. According to the astrogeologic data, there are 3 erosional peaks, during which the study area experienced uplifting and erosion, and favorable reservoirs formed. The largest erosion peak is located in the area of Well Chang-36~Yang-5~Chang-8 where denudation thickness is up to 1800-3000 m. The other two erosional peaks are located in the area of Well Chang-53 and Well Yang-1Changcan-1 with a denudation thickness of 18002100 m and 12001800 m, respectively
中文关键词	天文地层 ; 剥蚀量计算 ; 古近系 ; 新近系 ; 潍北凹陷 ; 昌潍地区 ; 山东
英文关键词	astrostratigraphy denudation calculation Eogene System Neogene System Changwei area North Changwei Sag Shandong Province
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:4109934
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224781
作者单位	中国石油大学(东营)地球资源与信息学院, 东营, 山东 257061, 中国
推荐引用方式 GB/T 7714	李文涛. 应用天文地层学方法对山东昌潍北部新生代不整合时间和剥蚀量的计算及其意义[J],2010,34(3):268-282.
APA	李文涛.(2010).应用天文地层学方法对山东昌潍北部新生代不整合时间和剥蚀量的计算及其意义.地层学杂志,34(3),268-282.
MLA	李文涛."应用天文地层学方法对山东昌潍北部新生代不整合时间和剥蚀量的计算及其意义".地层学杂志 34.3(2010):268-282.

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