鄂尔多斯盆地南缘铜川地区三叠系延长组长7段剖面及其油气地质意义

doi:10.13809/j.cnki.cn32-1825/te.2022.01.020

Abstract

Abstract:

Chang-7 Member in the Triassic Yanchang Formation served as the most important source rock of oil in the Mesozoic Ordos Basin, and it is also the realistic interval for the exploration and development of shale oil. The Chang-7 Member represents the climax depositional period of the Triassic lake basin. It is composed of a set of fine-grained clastic rocks, including mudstone and oil shale etc. The thickness of the Chang-7 Member is 100~120 m, which can be divided into three sub-members. Among them, the Chang-7₁ and Chang-7₂ sub-members have been proved as the key intervals for exploration and development of shale oil. To deepen the understanding of the sedimentary environment and oil and gas geological characteristics of the Chang-7 Member, measurement of the field sections are combined with the previous work. The well-exposed sections of the Chang-7 Member in Yishicun, Beiyincun, Yaoqu, Bawangzhuang and Tangnihe in Tongchuan area are described in detail. Furthermore, the geological background of the formation of hydrocarbon-rich depression in the middle-late Triassic stages is discussed. Our results show, the lake basin went through gradual shrinkage and declining lake level from Chang-7₃ sub-member to Chang-7₁ sub-member, and the sandstone content gradually increase to the upper part. The study area is located in the deep lake area of the Yanchang Formation deposition. The sedimentary types in the Chang-7 Member include not only normal deep-water fine-grained sedimentary rocks, but also diverse deep-water gravity flow deposits, volcanic tuff, and carbonate rocks which might source from hydrothermal fluid in the deep part. These important phenomena record the special process of the formation of the hydrocarbon-rich depression, and have important implications for understanding the hydrocarbon formation and enrichment mechanism, as well as the exploration and development of shale oil.

Key words: outcrop section, shale oil, hydrocarbon-rich depression, Chang-7 Member, Yangchang Formation, Ordos Basin

CLC Number:

TE121

Junfeng ZHAO,Chiyang LIU,Dongdong ZHANG, et al. Description and its hydrocarbon geological implications of outcrop sections of Triassic Chang-7 Member in southern Ordos Basin[J]. Reservoir Evaluation and Development, 2022, 12(1): 233-245.

Figures/Tables 11

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Fig. 9

Fig. 10

Fig. 11

References 28

[1]	LIU C Y, ZHAO H G, ZHAO J F, et al. Temporal-spatial coordinates of evolution of the Ordos Basin and its mineralization responses[J]. Acta Geologica Sinca(English Edition), 2008, 82(6):1229-1243.
[2]	付金华, 李士祥, 牛小兵, 等. 鄂尔多斯盆地三叠系长7段页岩油地质特征与勘探实践[J]. 石油勘探与开发, 2020, 47(5):870-883.
	FU Jinhua, LI Shixiang, NIU Xiaobing, et al. Geological characteristics and exploration of shale oil in Chang 7 Member of Triassic Yanchang Formation, Ordos Basin, NW China[J]. Petroleum Exploration and Development, 2020, 47(5):870-883.
[3]	白云来, 赵应成, 徐东, 等. 陕西铜川-黄陵地区油页岩地质特征及利用前景[J]. 现代地质, 2010, 24(1):158-166.
	BAI Yunlai, ZHAO Yingcheng, XU Dong, et al. Geological characteristics and developing-prospecting prospects of oil shale in Tongchuan-Huangling district, Shaanxi province[J]. Geoscience, 2010, 24(1):158-166.
[4]	李玉宏, 张文, 武富礼, 等. 陕西省铜川-黄陵地区延长组长7油页岩特征及资源潜力[J]. 西安科技大学学报, 2016, 36(6):647-656.
	LI Yuhong, ZHANG Wen, WU Fuli, et al. Characteristics and resource potential of oil shale in Chang 7 of Yanchang Formation in Tongchuan-Huangling area, Shaanxi provinces[J]. Journal of Xi’An University of Science and Technology, 2016, 36(6):647-656.
[5]	何自新. 鄂尔多斯盆地构造演化与油气[M]. 北京: 石油工业出版社, 2003:88-105.
	HE Zixin. Tectonic evolution and oil-gas in Ordos Basin[M]. Beijing: Petroleum Industry Press, 2003: 88-105.
[6]	惠潇, 赵彦德, 邵晓州, 等. 鄂尔多斯盆地中生界石油地质条件、资源潜力及勘探方向[J]. 海相油气地质, 2019, 24(2):14-22.
	HUI Xiao, ZHAO Yande, SHAO Xiaozhou, et al. The geological conditions, resource potential, and exploration direction of oil in Ordos Basin[J]. Marine Origin Petroleum Geology, 2019, 24(2):14-22.
[7]	李士祥, 牛小兵, 柳广弟, 等. 鄂尔多斯盆地延长组长7 段页岩油形成富集机理[J]. 石油与天然气地质, 2020, 41(4):719-729.
	LI Shixiang, NIU Xiaobing, LIU Guangdi, et al. Formation and accumulation mechanism of shale oil in the 7th member of Yanchang Formation, Ordos Basin[J]. Oil & Gas Geology, 2020, 41(4):719-729.
[8]	邓秀芹, 付金华, 姚泾利, 等. 鄂尔多斯盆地中及上三叠统延长组沉积相与油气勘探的突破[J]. 古地理学报, 2011, 13(4):443-455.
	DENG Xiuqin, FU Jinhua, YAO Jingli, et al. Sedimentary facies of the Middle-Upper Triassic Yanchang Formation in Ordos Basin and breakthrough in petroleum exploration[J]. Journal of Palaeogeography, 2011, 13(4):443-455.
[9]	ZHAO J F, MOUNTNEY N P, LIU C Y, et al. Outcrop architecture of a fluvio-lacustrine succession: Upper Triassic Yanchang Formation, Ordos Basin, China[J]. Marine and Petroleum Geology, 2015(68):394-413.
[10]	杨华, 李士祥, 刘显阳. 鄂尔多斯盆地致密油、页岩油特征及资源潜力[J]. 石油学报, 2013, 34(1):1-11.
	YANG Hua, LI Shixiang, LIU Xianyang. Characteristics and resource prospects of tight oil and shale oil in Ordos Basin[J]. Acta Petrolei Sinica, 2013, 34(1):1-11.
[11]	付金华, 牛小兵, 淡卫东, 等. 鄂尔多斯盆地中生界延长组长7段页岩油地质特征及勘探开发进展[J]. 中国石油勘探, 2019, 24(5):601-614.
	FU Jinhua, NIU Xiaobing, DAN Weidong, et al. The geological characteristics and the progress on exploration and development of shale oil in Chang 7 Member of Mesozoic Yanchang Formation, Ordos Basin[J]. China Petroleum Exploration, 2019, 24(5):601-614.
[12]	付锁堂, 姚泾利, 李士祥, 等. 鄂尔多斯盆地中生界延长组陆相页岩油富集特征与资源潜力[J]. 石油实验地质, 2020, 42(5):698-710.
	FU Suotang, YAO Jingli, LI Shixiang, et al. Enrichment characteristics and resource potential of continental shale oil in Mesozoic Yanchang Formation, Ordos Basin[J]. Petroleum Geology & Experiment, 2020, 42(5):698-710.
[13]	邹才能, 杨智, 崔景伟, 等. 页岩油形成机制、地质特征及发展对策[J]. 石油勘探与开发, 2013, 40(1):14-26.
	ZOU Caineng, YANG Zhi, CUI Jingwei, et al. Formation mechanism, geological characteristics, and development strategy of nonmarine shale oil in China[J]. Petroleum Exploration and Development, 2013, 40(1) : 14-26.
[14]	杨华, 付金华, 袁效奇. 鄂尔多斯盆地南缘地质剖面图集[M]. 北京: 石油工业出版社, 2016:1-503.
	YANG Hua, FU Jinhua, YUAN Xiaoqi. Atlas of the outcrop sections in the southern Ordos Basin[M]. Beijing: Petroleum Industry Press, 2016: 1-503.
[15]	何自新, 杨华, 袁效奇. 鄂尔多斯盆地地质剖面图集[M]. 北京: 石油工业出版社, 2004:1-422.
	HE Zixin, YANG Hua, YUAN Xiaoqi. Atlas of the outcrop sections in the Ordos Basin[M]. Beijing: Petroleum Industry Press, 2004: 1-422.
[16]	李玉宏, 李文厚, 张倩. 鄂尔多斯盆地及周缘沉积相图册[M]. 北京: 地质出版社, 2020:1-154.
	LI Yuhong, LI Wenhou, ZHANG Qian. Atlas of sedimentary facies distribution in the Ordos Basin and its neighboring areas[M]. Beijing: Geological Publishing House, 2020: 1-154.
[17]	王香增. 鄂尔多斯盆地东南部中生界野外露头剖面(图册)及其地质解释[M]. 西安: 西北大学出版社, 2012:1-188.
	WANG Xiangzeng. Atlas of Mesozoic field outcrop of section and its geological interpretation in southern of Ordos Basin[M]. Xi’an: Northwest University Press, 2012: 1-188.
[18]	耳闯, 赵靖舟, 王芮, 等. 沉积环境对富有机质页岩分布的控制作用—以鄂尔多斯盆地三叠系延长组长7油层组为例[J]. 天然气地球科学, 2015, 26(5):823-832.
	ER Chuang, ZHAO Jingzhou, WANG Rui, et al. Controlling role of sedimentary environment on the distribution of organic-rich shale: A case study of the Chang 7 Member of the Triassic Yanchang Formation, Ordos Basin[J]. Natural Gas Geoscience, 2015, 26(5):823-832.
[19]	吕奇奇, 罗顺社, 付金华, 等. 湖泊深水重力流沉积露头精细解剖—以鄂尔多斯盆地瑶曲剖面长7油层组为例[J]. 地质学报, 2017, 91(3):617-628.
	LYU Qiqi, LUO Shunshe, FU Jinhua, et al. Outcrop-based analysis of a deep-water gravity flow sediments in lake: A case study from the Chang 7 of Yaoqu section, Ordos Basin[J]. Acta Geologica Sinica, 2017, 91(3):617-628.
[20]	马奂奂, 刘池洋, 张龙, 等. 鄂尔多斯盆地延长组长7 段沉积岩元素地球化学特征及沉积环境分析[J]. 现代地质, 2019, 33(4):872-882.
	MA Huanhuan, LIU Chiyang, ZHANG Long, et al. Geochemical characteristics and depositional environment implications of sedimentary rocks in the Chang 7 Member of Yanchang Formation in the Ordos Basin[J]. Geoscience, 2019, 33(4):872-882.
[21]	李森, 朱如凯, 崔景伟, 等. 古环境与有机质富集控制因素研究——以鄂尔多斯盆地南缘长7油层组为例[J]. 岩性油气藏, 2019, 31(1):87-95.
	LI Sen, ZHU Rukai, CUI Jingwei, et al. Paleoenvironment and controlling factors of organic matter enrichment: A case of Chang 7 oil reservoir in southern margin of Ordos Basin[J]. Lithologic Reservoirs, 2019, 31(1):87-95.
[22]	邓秀芹, 罗安湘, 张忠义, 等. 秦岭造山带与鄂尔多斯盆地印支期构造事件年代学对比[J]. 沉积学报, 2013, 31(5):939-953.
	DENG Xiuqin, LUO Anxiang, ZHANG Zhongyi, et al. Geochronological comparison on Indosinian tectonic events between Qinling orogeny and Ordos Basin[J]. Acta Sedimentologica Sinica, 2013, 31(5):939-953.
[23]	王建强, 刘池洋, 李行, 等. 鄂尔多斯盆地南部延长组长7段凝灰岩形成时代、物质来源及其意义[J]. 沉积学报, 2017, 35(4):691-704.
	WANG Jianqiang, LIU Chiyang, LI Hang, et al. Geochronology, potential source and regional implications of tuff intervals in Chang-7 member of Yanchang Formation, south of Ordos Basin[J]. Acta Sedimentologica Sinica, 2017, 35(4):691-704.
[24]	张辉, 彭平安, 张文正. 鄂尔多斯盆地延长组长 7 段凝灰岩锆石 U-Pb年龄、Hf 同位素组成特征及其地质意义[J]. 岩石学报, 2014, 30(2):565-575.
	ZHANG Hui, PENG Ping'an, ZHANG Wenzheng. Zircon U-Pb ages and Hf isotope characterization and their geological significance of Chang 7 tuff of Yanchang Formation in the Ordos Basin[J]. Acta Petrologica Sinica, 2014, 30(2):565-575.
[25]	王多云, 辛卜社, 杨华, 等. 鄂尔多斯盆地延长组长7底部凝灰岩锆石SHRIMP U-Pb 年龄及地质意义[J]. 中国科学(地球科学), 2014, 44(10):2160-2171.
	WANG Duoyun, XIN Bushe, YANG Hua, et al. Zircon SHRIMP U-Pb age and geological implications of tuff at the bottom of Chang 7 Member of Yanchang Formation in the Ordos Basin[J]. Scientia Sinica(Terrae), 2014, 44(10):2160-2171.
[26]	马瑶, 李文厚, 刘江斌, 等. 鄂尔多斯盆地南缘铜川地区三叠系延长组油页岩中“钙质结核”的成因初探[J]. 地质科学, 2018, 53(2):458-469.
	MA Yao, LI Wenhou, LIU Jiangbin, et al. A preliminary discussion on the origin of “calcareous concretion” in oil shale of Yanchang Formation in Tongchuan area, southern Ordos Basin[J]. Chinese Journal of Geology, 2018, 53(2):458-469.
[27]	刘池洋, 王建强, 邱欣卫, 等. 鄂尔多斯盆地延长期富烃坳陷形成的动力学环境与构造属性[J]. 岩石学报, 2020, 36(6):1913-1930.
	LIU Chiyang, WANG Jianqiang, QIU Xinwei, et al. Geodynamic environment and tectonic attributes of the hydrocarbon-rich sag in Yanchang Period of Middle-Late Triassic, Ordos Basin[J]. Acta Petrologica Sinica, 2020, 36(6):1913-1930.
[28]	王良书, 徐鸣杰, 刘绍文, 等. 鄂尔多斯盆地及邻区地球物理场与深部结构. 见:刘池洋, 吴柏林主编. 油气煤铀同盆共存成藏(矿)机理与富集分布规律[M]. 北京: 科学出版社, 2016:181-213.
	WANG Liangshu, XU Mingjie, LIU Shaowen, et al. Geophysical field and deep structure in the Ordos basin and its adjacent areas. In: LIU Chiyang and WU Bailin. Accumulation(Mineralization) mechanism and spatial enrichment law of oil/gas, coal and uranium coexisting in the same basin[M]. Beijing: Science Press, 2016: 181-213.

Description and its hydrocarbon geological implications of outcrop sections of Triassic Chang-7 Member in southern Ordos Basin

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 11

References 28

Related Articles 15

Metrics

Comments

Recommended 0

[1]	WANG Liangjun, WANG Yong, ZHANG Xinwen, JIN Yunyun, ZHU Yan, ZHANG Gaoyuan, LI Hui, LI Wangju. Coal accumulation control on gas and coalbed methane exploration potential in southern Ordos Basin: A case study of Carboniferous Taiyuan Formation in Xunyi exploration area [J]. Petroleum Reservoir Evaluation and Development, 2025, 15(2): 175-184.
[2]	MA Litao, WU Peng, YANG Jianghao, HU Weiqiang, HUANG Ying, LIU Cheng, NIU Yanwei, WANG Zhizhuang, REN Dazhong. Microscopic pore structure characteristics and implications of deep coal measure reservoirs in eastern Ordos Basin [J]. Petroleum Reservoir Evaluation and Development, 2025, 15(2): 217-226.
[3]	LIN Weiqiang, CONG Peng, WANG Hong, WEI Zichen, YANG Yuntian, YAO Zhiqiang, QU Lili, MA Limin, WANG Fanglu. Application and discussion of geological guidance technology for deep coalbed methane horizontal wells: A case study of block X in Shenmu gas field, Ordos Basin [J]. Petroleum Reservoir Evaluation and Development, 2025, 15(2): 300-309.
[4]	ZHONG Zhiguo, YU Wenquan, DUAN Hongliang, YANG Baoliang. Progress and research direction of shale oil exploration in complex fault blocks with low to medium TOC in Subei Basin [J]. Petroleum Reservoir Evaluation and Development, 2025, 15(1): 11-18.
[5]	CHAI Nina, LI Jiarui, ZHANG Liwen, WANG Junjie, LIU Yapeng, ZHU Lun. Experimental study on hydraulic fracture propagation in interbedded continental shale oil reservoirs [J]. Petroleum Reservoir Evaluation and Development, 2025, 15(1): 124-130.
[6]	QIAN Shiyou, YANG Zhiqiang, XU Chen. Logging evaluation methods of low-organic matter fault-block shale oil in the Subei Basin and their application [J]. Petroleum Reservoir Evaluation and Development, 2025, 15(1): 19-27.
[7]	ZHOU Xu, MA Chao, LIU Chao, TANG Jiajing, LIU Yilin. Study on the influence of shale oil saturation on imbibition recovery rate [J]. Petroleum Reservoir Evaluation and Development, 2025, 15(1): 73-78.
[8]	JIA Junhong, YU Guangming, LI Shuman, XIE Zhen, PENG Rong, TANG Yong. Analysis of key controlling factors for water injection deficiency in low-permeability oil reservoirs: A case study of Chang-8 reservoir in Ordos Basin [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(6): 892-898.
[9]	HE Faqi, LI Junlu, GAO Yilong, WU Jinwei, BAI Xingying, GAO Dun. Development characteristics and potential of fault-fracture reservoir in southwest margin of Ordos Basin [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 667-677.
[10]	YU Wenduan, GAO Yuqiao, ZAN Ling, MA Xiaodong, YU Qilin, LI Zhipeng, ZHANG Zhihuan. Distribution of oil bearing and shale oil-rich strata in the second member of Funing Formation in Qintong Sag [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 688-698.
[11]	WANG Xinqian, YU Wenduan, MA Xiaodong, ZHOU Tao, TAI Hao, CUI Qinyu, DENG Kong, LU Yongchao, LIU Zhanhong. Identification and application of shale lithofacies based on conventional logging curves: A case study of the second member of Funing Formation in Qintong Sag, Subei Basin [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 699-706.
[12]	ZHANG Fei, LI Qiuzheng, JIANG Aming, DENG Ci. Application of shale oil 2D NMR logging evaluation in Huazhuang area of Gaoyou Sag [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 707-713.
[13]	CAO Xiaopeng, LIU Haicheng, LI Zhongxin, CHEN Xianchao, JIANG Pengyu, FAN Hao. Optimization of huff-n-puff in shale oil horizontal wells based on EDFM [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 734-740.
[14]	LIAO Kai, ZHANG Shicheng, XIE Bobo. Simulation of reasonable shut-in time for shale oil after volume fracturing [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 749-755.
[15]	LIU Xugang, LI Guofeng, LI Lei, WANG Ruixia, FANG Yanming. Imbibition displacement mechanism of fracturing fluid in shale oil reservoir [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 756-763.