鄂尔多斯盆地延长探区本溪组物源分析

樊宇洁; 孟祥振; 蒲仁海; 高小平; 强腾; 宋明

doi:10.19509/j.cnki.dzkq.tb20240191

鄂尔多斯盆地延长探区本溪组物源分析

doi: 10.19509/j.cnki.dzkq.tb20240191

1.
西北大学地质学系/大陆动力学国家重点实验室，西安 710069
2.
陕西延长石油（集团）有限责任公司天然气研究院分公司，西安 710061
3.
陕西延长石油（集团）有限责任公司气田公司，陕西延安 716000

基金项目: 国家重大基金项目（41390451）；陕西省重点研发计划项目（2022GY-140）

详细信息

作者简介:
樊宇洁：E-mail：2772451055@qq.com

通讯作者:
E-mail：purenhai@126.com

中图分类号: P618
计量
- 文章访问数: 158
- PDF下载量: 16
- 被引次数: 0
出版历程
- 收稿日期: 2024-04-25
- 录用日期: 2024-08-07
- 修回日期: 2024-08-07
- 网络出版日期: 2024-08-07

Provenance Analysis of Benxi Formation in Yanchang Exploration Area of Ordos Basin

1.
Department of Geology/State Key Laboratory of Continental Dynamics, Northwest University, Xi'an 710069, China
2.
Natural Gas Research Institute Branch, Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, 710061, China
3.
Gas Field Company, Shaanxi Yanchang Petroleum (Group) Co., Ltd., Yan'an 716000, China

More Information

Author Bio:
E-mail：2772451055@qq.com

Corresponding author: E-mail：purenhai@126.com

摘要

摘要:
碎屑物质来源是控制延长探区内本溪组砂岩储层发育和展布的重要因素之一。本研究对延长探区内37口井砂岩和泥岩样品开展了碎屑锆石U-Pb年龄、重矿物组合、微量元素以及砂砾岩粒径统计等分析，在此基础上揭示本溪组碎屑物质的主要来源和搬运方向。研究表明探区内延528井的1912 Ma和2425 Ma 2个年龄峰值与华北克拉通北缘相对应，其他5口井的年龄峰值段（435，447）Ma和（952，976）Ma则与北秦岭的年龄峰值相对应，据此可将探区内物源划分为NE和S部2个方向。通过锆石、电气石和金红石等重矿物，可将南方物源进一步划分为WS和ES 2个方向；与重矿物分析结果相对应，在微量元素锆铌比分析中，存在WS陇东地区和ES豫西地区2个方向的物源；通过对砂砾岩粒径在平面上的分布特征进行分析，显示出研究区存在来自SE方向的物源。综合分析可得，延长探区本溪组总体上可划分为NE、SW和SE 3个物源区，分别指示了盆地北缘阴山、盆地南缘祁连山和北秦岭东段剥蚀区，其中SE方向物源距延长探区最近，对探区影响较大。该成果探明了研究区内的3个物源方向以及其影响区域，对延长本溪组砂体分布预测和沉积相划分具有重要的参考意义。
- 本溪组 /
- 沉积物源 /
- 锆石 /
- 重矿物 /
- 微量元素 /
- 砾径 /
- 鄂尔多斯盆地
Abstract: Objective
The provenance of detritus is a crucial factor in controlling the development and distribution of the Benxi Formation sandstone reservoir in the Yanchang exploration area.
Methods
Based on previous research, this study employed four methods for the provenance study of the Benxi Formation, including detrital zircon U-Pb ages, heavy mineral assemblages, trace elements, and sandstone gravel size statistical analysis, on sand and mudstone samples from 37 wells in the Yanchang exploration area.
Results
The results show that zircon age populations with peaks at 1912 Ma and 2425 Ma correspond to the northern edge of the North China Craton, whereas the peak groups at 435-447 Ma and 952-976 Ma from five wells are related to the North Qinling Mountains. Based on these findings, the provenance of sedimentary rocks can be divided into two primary directions: north and south. Furthermore, heavy mineral assemblage analysis revealed higher zircon and tour Maline content in the southwest region, while the southeast region exhibited a higher rutile content, suggesting that the southern source can be further subdivided into southwest and southeast directions. Corresponding trace element analysis, particularly the Zr/Nb values, corroborated these findings, indicating two provenance directions of southwest Longdong and southeast Yuxi. Additionally, the spatial distribution of sandstone gravel diameters suggested a southeast source within the study area.
Conclusion
Comprehensive analysis concludes that the Benxi Formation in the Yanchang exploration area can be categorized into three prmary source areas: northeast, southwest, and southeast. These sources correspond to erosion areas along the northern margin of the basin, the southern margin of the Qilian Mountains, and the eastern section of the North Qinling Mountains, respectively. The southeast source area is closest to the Yanchang exploration area and contributes more sediments than other source terranes. This study illustrates the three provenance areas of the Benxi For Mation and their influence zones, which are significant for predicting the distribution of sand bodies and delineating sedimentary facies in the Yanchang exploration area.
- Benxi Formation /
- sediment source /
- zircon /
- heavy minerals /
- trace elements /
- gravel size /
- Ordos Basin

HTML全文

图 1 鄂尔多斯盆地延长探区的地理位置图(a)^[7]及样品点位分布图(b)

Figure 1. Geographical Location map of the Yanchang Exploration Area in the Ordos Basin(a) and Sample Point Distribution map(b)

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图 2 鄂尔多斯盆地延长探区地层综合柱状图^[1]

Figure 2. Comprehensive stratigraphic bar chart of the Yanchang exploration area in the Ordos Basin

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图 3 代表性碎屑锆石阴极发光图像

Figure 3. Representative cathodoluminescence photos of detrital zircons in this study Ma

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图 4 研究区东部本溪组锆石物源数据分析图

Figure 4. Analysis of zircon source data in the Benxi Formation in the eastern part of the study area

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图 5 潜在物源年龄谱^[18]

Figure 5. Potential source age spectrum

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图 6 研究区重矿物组合类型(a)与重矿物ZTR值平面分布特征图(b)

Figure 6. Types of heavy mineral combinations in the study area (a) and the planar distribution characteristics of the ZTR index of heavy minerals (b)

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图 7 延长探区本溪组的La-Th-Sc (a)和Th-Sc-Zr/10图解(b)^[22]

Figure 7. Diagram of La Th Sc (a) and Th Sc Zr/10 (b) in the Benxi Formation of the Yanchang Exploration Area

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图 8 研究区泥岩及邻区不同岩体稀土元素配分模式图^[24–30]

Figure 8. REE distribution patterns of mudstone and different rock masses in the study area and adjacent areas

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图 9 本溪组不同岩性的Zr/Nb图解

Figure 9. Intersection of Nb and Zr element contents in different rock types of the Benxi Formation

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图 10 研究区及周边附近本溪组取芯岩石粒度分布

Figure 10. Particle size distribution map of core rocks from the Benxi Formation in the study area and surrounding areas

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图 11 鄂尔多斯盆地本溪组沉积期古地理背景^[34](a)与延长气田内的物源区分布示意图(b)

Figure 11. Paleogeographic Background of the Benxi Formation Sedimentary Period in the Ordos Basin (a) and Distribution of Source Areas in the Yanchang Gas Field (b)

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表 1 研究区采样井名、岩性和分析项目表

Table 1. List of Sampling Well Names, Lithology, and Analysis Items in the Study Area

分析项目	岩性	样品数量/个	井名
重矿物	砂岩	17	延505，延873，延877，延2104，延2126，延582，延1521延752，延528，延419，长106，延1051，试8，延349延1706，延304，延350
碎屑锆石	砂岩	6	延349，延528，延1051，延1706，延304，试8
微量元素	泥岩	12	试8，延1051，延1057，延1059，延1706，延349，延505延528，延838，延975，延2104，延2126
碎屑粒径	砂岩	20	延744，延500，延600，延505，延1123，延885，延1057延1003，延1077，延1126，延1116，延1138，延851延1083，延1088，延1109，延2046，延864，延349，试8

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表 2 锆石年龄分析表

Table 2. Zircon Age Analysis Table

取样井位	有效数据点/个	年龄变化范围/Ma	分组/Ma	峰值年龄/Ma	数量/个	百分比/%
试8井	96	(422，3617)	(326，530)	447	30	31.2
			(549，1462)	976	35	36.5
			(1518，3615)	2470	31	32.7
延349井	88	(418，3120)	(414，496)	447	33	34.4
			(502，1458)	976	38	39.6
			(1589，3120)	2470	23	26.0
延304井	96	(424，3217)	(407，673)	444	49	51.0
			(869，1595)	971	18	18.8
			(1728，3204)	2477	29	30.2
延1051井	96	(422，3230)	(421，465)	435	32	33.3
			(735，1932)	971	42	43.8
			(2115，3210)	2487	22	22.9
延1706井	96	(390，3627)	(375，669)	447	30	31.3
			(777，2042)	952	39	40.6
			(2302，3621)	2458	27	28.1
延528井	96	(265，2651)	(265，467)	307、398	13	13.5
			(1473，2651)	1912，2425	77	80.2
			(963，1344)	未形成年龄峰值	6	6.3

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表 3 研究区本溪组重矿物含量对比表

Table 3. Comparison of Heavy Mineral Content in the Benxi Formation of the Study Area

样品井位	陆源重矿物含量/mg
样品井位	锆石	电气石	石榴子石	磷灰石	磁铁矿	白钛石	金红石	锐钛矿
延505井	54.39	31.84		1.03	0.61	4.11	42.08	72.87
延873井	66.79	8.26			1.4	56.78	14.41	4.73
延877井		0.01			0.02
延2104井	62.83	57.25				60.32	25.13	294.06
延2126井	26.65	93.53				26.65	79.96	53.3
延349井	0.59	0.79		0.1		0.1	2.23	11.39
延528井	17.34		21.97			21.97	5.78	16.19
延1051井	7.69	7.69				6.18	18.09	19.45
延1706井	3.17	1.06				2.11	7.4	12.69
延304井	18.68	1.25				24.91	49.81	83.43
试8井	1.44	0.48				2.08	1.92	14.24
延752井	7.82	1.12				1.12
延582井	3.79	1.19		0.96		7.45	1.37	3.79
延419井	17.82	3.56				14.25	39.2	7.13
延1521井	6.21	1.94				1.94	4.66	7.37
延350井	1.90	0.17				0.52	3.11	0.35
长106井	1.2	0.68				0.85	5.98	1.37

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参考文献(35)

[1]	贾浪波,钟大康,孙海涛,等. 鄂尔多斯盆地本溪组沉积物物源探讨及其构造意义[J]. 沉积学报,2019,37(5):1087-1103. JIA L B,ZHONG D K,SUN H T,et al. Sediment provenance analysis and tectonic implication of the Benxi Formation,Ordos Basin[J]. Acta Sedimentologica Sinica,2019,37(5):1087-1103. (in Chinese with English abstract
[2]	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. LIU R E,HUANG Y M,WEI X F,et al. Analysis of provenance of Late Paleozoic in the northern Ordos Basin and its geological significance[J]. Journal of Mineralogy and Petrology,2003,23(3):82-86. (in Chinese with English abstract
[3]	陈全红,李文厚,胡孝林,等. 鄂尔多斯盆地晚古生代沉积岩源区构造背景及物源分析[J]. 地质学报,2012,86(7):1150-1162. CHEN Q H,LI W H,HU X L,et al. Tectonic setting and provenance analysis of Late Paleozoic sedimentary rocks in the Ordos Basin[J]. Acta Geologica Sinica,2012,86(7):1150-1162. (in Chinese with English abstract
[4]	张靖芪,虎建玲,谢远飞,等. 鄂尔多斯盆地西北缘晚石炭世−中二叠世沉积背景特征与演化[J]. 沉积学报,2025,43(1):121-138. ZHANG J Q,HU J L,XIE Y F,et al. Depositional background and evolution of Late Carboniferous-Middle Permian,northwestern margin of the Ordos Basin,China[J]. Acta Sedimentologica Sinica,2025,43(1):121-138. (in Chinese with English abstract
[5]	刘贤. 鄂尔多斯盆地延长地区上古生界物源分析及意义[D]. 西安:西北大学,2010. LIU X. Provenance analysis and its significance of Upper Paleozoic in Yanchang area,Ordos Basin. Xi’an:Northwest University,2010. (in Chinese with English abstract
[6]	林进,李云,何剑. 鄂尔多斯延长探区本溪组物源及沉积体系分析[J]. 中国地质,2013,40(5):1542-1551. LIN J,LI Y,HE J. An analysis of the source and the sedimentary system of the Carboniferous Benxi Formation in Yanchang area of Ordos Basin[J]. Geology in China,2013,40(5):1542-1551. (in Chinese with English abstract
[7]	高志东. 鄂尔多斯盆地上石炭统本溪组物源分析及有利砂体发育规律[D]. 成都:成都理工大学,2019. GAO Z D. Provenance analysis of Benxi Formation of Upper Carboniferous in Ordos Basin and distribution regularity of favorable sand bodies[D]. Chengdu:Chengdu University of Technology,2019. (in Chinese with English abstract
[8]	YANG Y T,LI W,MA L. Tectonic and stratigraphic controls of hydrocarbon systems in the Ordos Basin:A multicycle cratonic basin in Central China[J]. AAPG Bulletin,2005,89(2):255-269. doi: 10.1306/10070404027
[9]	ZHAO J F,LIU C Y,HUANG L,et al. Paleogeography reconstruction of a multi-stage modified intra-cratonic basin:A case study from the Jurassic Ordos Basin,western north China craton[J]. Journal of Asian Earth Sciences,2020,190:104191. doi: 10.1016/j.jseaes.2019.104191
[10]	SHEN Y L,GUO Y H,JING H X,et al. Study on sequence stratigraphy from Benxi to Taiyuan Formation in northeastern Ordos Basin[J]. Procedia Earth and Planetary Science,2009,1(1):995-1001. doi: 10.1016/j.proeps.2009.09.154
[11]	MORTON A C,WHITHAM A G,FANNING C M. Provenance of Late Cretaceous to Paleocene submarine fan sandstones in the Norwegian Sea:Integration of heavy mineral,mineral chemical and zircon age data[J]. Sedimentary Geology,2005,182(1/2/3/4):3-28.
[12]	ZHANG Z H,WANG H L. Comprehensive provenance analysis and its applications to Eocene clastic rocks in the Huimin Depression,Bohai Bay Basin,China[J]. Minerals,2019,9(9):517. doi: 10.3390/min9090517
[13]	SAWAKUCHI A O,RODRIGUES F C G,MINELI T D,et al. Optically stimulated luminescence sensitivity of quartz for provenance analysis[J]. Methods and Protocols,2020,3(1):6. doi: 10.3390/mps3010006
[14]	RAI P,BORGOHAIN B,CHETTRI N,et al. A comparative heavy mineral study of the Cenozoic sediments of Assam and siwalik Foreland Basins,northeast Himalaya[J]. Journal of the Geological Society of India,2020,96(5):475-484. doi: 10.1007/s12594-020-1585-y
[15]	ZACHARIáŠ J,KUCHAŘOVá A,KOTRLý M. Provenance analysis of marbles by combination of cathodoluminescence spectroscopy and electron microprobe analyses:Methodological comments[J]. Minerals,2023,13(2):244. doi: 10.3390/min13020244
[16]	龚胜利,闫琢玉,李百强,等. 琼东南盆地中中新统海底扇碎屑岩锆石U-Pb年龄特征及物源分析[J]. 地质科技通报,2024,43(5):45-54. GONG S L,YAN Z Y,LI B Q,et al. U-Pb age characteristics of detrital zircon and provenance analysis of a Middle Miocene submarine fan in the Qiongdongnan Basin[J]. Bulletin of Geological Science and Technology,2024,43(5):45-54. (in Chinese with English abstract
[17]	席胜利,王怀厂,秦伯平. 鄂尔多斯盆地北部山西组、下石盒子组物源分析[J]. 天然气工业,2002,22(2):21-24. XI S L,WANG H C,QIN B P. Analysis of the material sources of Shanxi Formation and Shihezi Formation in north E'erduosi Basin[J]. Natural Gas Industry,2002,22(2):21-24. (in Chinese with English abstract
[18]	GUO P,LIU C Y,WANG J Q,et al. Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin,north China:Evidences for multi-cycle sedimentation[J]. Geoscience Frontiers,2018,9(6):1725-1743. doi: 10.1016/j.gsf.2017.11.003
[19]	ZHAO X C,LIU C Y,WANG J Q,et al. Provenance analyses of Lower Cretaceous strata in the Liupanshan Basin:From paleocurrents indicators,conglomerate clast compositions,and zircon U-Pb geochronology[J]. Journal of Earth Science,2020,31(4):757-771. doi: 10.1007/s12583-020-1324-8
[20]	潘双苹,胡光明,李积永,等. 柴达木盆地扎哈泉地区新近纪物源分析[J]. 地质科技通报,2023,42(3):201-209. PAN S P,HU G M,LI J Y,et al. Analysis of Neogene provenance in zhahaquan area,Qaidam Basin[J]. Bulletin of Geological Science and Technology,2023,42(3):201-209. (in Chinese with English abstract
[21]	BHATIA M R. Rare earth element geochemistry of Australian Paleozoic graywackes and mudrocks:Provenance and tectonic control[J]. Sedimentary Geology,1985,45(1/2):97-113.
[22]	BHATIA M R,CROOK K A W. Trace element characteristics of graywackes and tectonic setting discrimination of sedimentary Basins[J]. Contributions to Mineralogy and Petrology,1986,92(2):181-193. doi: 10.1007/BF00375292
[23]	Boynton,W. V. Chapter 3-Cosmochemistry of the Rare Earth Elements:Meteorite Studies[A]. In Developments in Geochemistry[M]. edited by Henderson. Elsevier,1984,2:63-114.
[24]	刘江斌. 鄂尔多斯盆地西南部三叠系延长组沉积体系研究[D]. 西安:西北大学,2017. LIU J B. Depositional System of the Triassic Yanchang Formation in southwestern Ordos Basin[D]. Xi'an:Northwest University,2017. (in Chinese with English abstract
[25]	魏方辉,裴先治,李瑞保,等. 甘肃天水地区早古生代黄门川花岗闪长岩体LA-ICP-MS锆石U-Pb定年及构造意义[J]. 地质通报,2012,31(9):1496-1509. WEI F H,PEI X Z,LI R B,et al. LA-ICP-MS zircon U-Pb dating of Early Paleozoic Huangmenchuan granodiorite in Tianshui area of Gansu Province and its tectonic significance[J]. Geological Bulletin of China,2012,31(9):1496-1509. (in Chinese with English abstract
[26]	宋凯,吕剑文,杜金良,等. 鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系[J]. 古地理学报,2002,4(3):59-66. SONG K,LU J W,DU J L,et al. Source direction analysis and delta depositional systems of Yanchang Formation of the Upper Triassic in the central Ordos Basin[J]. Journal of Palaeogeography,2002,4(3):59-66. (in Chinese with English abstract
[27]	王廷印,高军平,王金荣,等. 内蒙古阿拉善北部地区碰撞期和后造山期岩浆作用[J]. 地质学报,1998,72(2):126-137. WANG T Y,GAO J P,WANG J R,et al. Magmatism of collisional and post-orogenic period in northern alaxa region in Inner Mongolia[J]. Acta Geologica Sinica,1998,72(2):126-137. (in Chinese with English abstract
[28]	耿元生,周喜文. 阿拉善地区新元古代早期花岗岩的地球化学和锆石Hf同位素特征[J]. 岩石学报,2011,27(4):897-908. GENG Y S,ZHOU X W. Characterastics of geochemistry and zircon Hf isotope of the Early Neoproterozoic granite in Alax area,Inner Mongolia[J]. Acta Petrologica Sinica,2011,27(4):897-908. (in Chinese with English abstract
[29]	王晓霞,王涛,李伍平. 秦岭杂岩中花岗质片麻岩体的岩石地球化学特征及成因[J]. 矿物岩石,1997,17(3):76-82. WANG X X,WANG T,LI W P. The geochemistry characteristics and genesis of the granitic gneisses in Qinling complex[J]. Mineralogy and Petrology,1997,17(3):76-82. (in Chinese).
[30]	林孝先. 陆源碎屑岩盆地综合物源分析:以鄂尔多斯盆地北部山西组为例[D]. 成都:成都理工大学,2011. LIN X X. A synthetic thought of provenance analysis in the Terrigenous Clastic Rock Basin:An example in the Lower Permian Shanxi Formation,northern Ordos Basin. Chengdu:Chengdu University of Technology,2011. (in Chinese with English abstract
[31]	MENG X Z,PU R H,DOU T C,et al. Longshore changes in the microfacies and distribution of clastic barrier coastal sandbodies:A case from the Benxi Formation in the Ordos Basin,China[J]. Journal of Petroleum Exploration and Production Technology,2024,14(5):1129-1148. doi: 10.1007/s13202-024-01760-4
[32]	CHEN A Q,ZOU H,OGG J G,et al. Source-to-sink of Late Carboniferous Ordos Basin:Constraints on crustal accretion margins converting to orogenic belts bounding the North China Block[J]. Geoscience Frontiers,2020,11(6):2031-2052. doi: 10.1016/j.gsf.2020.05.008
[33]	CHEN R,WANG F,LI Z,et al. Late Paleozoic provenance shift in the east-central Ordos Basin:Implications for the tectonic evolution of the North China Craton[J]. Journal of Asian Earth Sciences,2021,215:104799. doi: 10.1016/j.jseaes.2021.104799
[34]	王若谷,周进松,杜永慧,等. 鄂尔多斯盆地东南部延安气田石炭系—二叠系沉积演化模式[J]. 地质科学,2021,56(4):1088-1105. WANG R G,ZHOU J S,DU Y H,et al. Deposition evolution model of the Carboniferous-Permian in Yan’an gas field,the southeastern Ordos Basin[J]. Chinese Journal of Geology (Scientia Geologica Sinica),2021,56(4):1088-1105. (in Chinese with English abstract
[35]	FU C,YU X H,LI S L. Multiple sediment source infill in a low-accommodation basin:Implications for the Late Paleozoic sediment routing system in the southeastern Ordos Basin[J]. Geological Magazine,2023,160(9):1649-1672. doi: 10.1017/S0016756823000572