鄂尔多斯盆地中部地区三叠系延长组7段暗色泥岩烃源岩特征

doi:10.11743/ogg20210507

摘要/Abstract

摘要：

鄂尔多斯盆地延长组7段（长7段）为典型的湖相沉积。在鄂尔多斯盆地中部地区，由于靠近湖泊的边缘，长7段泥页岩厚度偏薄，针对该地区的烃源岩研究尤其是泥岩的研究薄弱。基于15口探井开展了暗色泥岩的甄别工作并进行了采样，然后运用岩心观察、有机碳测定、岩石热解、色谱-质谱等分析手段，全面获得了暗色泥岩的烃源岩特征参数。研究表明，长7段暗色泥岩发育于弱还原-弱氧化的沉积环境。暗色泥岩的有机质丰度高，TOC平均值2.39%；有机质以Ⅱ₂型和Ⅲ型为主；生烃潜力好，S₁+S₂平均值7.65 mg/g；热演化适中，R_o平均值0.98%。暗色泥岩的生烃量总计7.93×10⁸ t，排烃量总计3.37×10⁸ t，残留烃量总计4.56×10⁸ t，综合排烃效率42.50%。暗色泥岩与页岩对研究区油气资源的贡献比为1：1.8。长7段暗色泥岩的生烃有机质包括陆源性输入来源和水体有机质来源。

关键词: 暗色泥岩, 页岩, 烃源岩, 延长组, 鄂尔多斯盆地

Abstract:

The seventh member of Yanchang Formation (Chang 7 Member) in Ordos Basin is typical lacustrine dark mudstone, which slims down while approaching lake rim at the central part of the basin.The study of source rocks, especially the dark mudstone as source rock in that part, has been very limited due to its thinness.Dark mudstone samples from 15 exploration wells in the area are collected and analyzed through core observation, TOC determination, rock pyrolysis, GC-MS and organic carbon isotope analysis.The results indicate a sedimentary environment of weak reduction and oxidation with mixed inputs of plankton and terrestrial plants for the dark mudstone and provide parameters that define the dark mudstone as a good source rock: high TOC (averaged at 2.39%), type Ⅱ₂ and type Ⅲ dominated organic matter with an average S₁+S₂ at 7.65 mg/g, and moderate thermal evolution with R_o averaged at 0.98%.The total hydrocarbon generation amount, hydrocarbon expulsion amount and residual hydrocarbon amount of the dark mudstone are respectively measured to be 793, 337 and 456 million tons.And the comprehensive hydrocarbon expulsion efficiency is 42.50%.The contribution ratio of dark mudstone and shale to the oil and gas resources in the area is 1:1.8.All indicate great source rock potential of the stone.

Key words: dark mudstone, shale, source rock, Yanchang Formation, Ordos Basin

中图分类号:

TE122.1

张亚雄. 鄂尔多斯盆地中部地区三叠系延长组7段暗色泥岩烃源岩特征[J]. 石油与天然气地质, 2021, 42(5): 1089-1097. doi: 10.11743/ogg20210507 Yaxiong Zhang. Source rock characterization: The dark mudstone in Chang 7 Member of Triassic, central Ordos Basin[J]. Oil & Gas Geology, 2021, 42(5): 1089-1097. doi: 10.11743/ogg20210507

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参考文献 30

1	杨华, 窦伟坦, 刘显阳, 等. 鄂尔多斯盆地三叠系延长组长7沉积相分析[J]. 沉积学报, 2010, 28 (2): 254- 263.
	Yang Hua , Dou Weitan , Liu Xianyang , et al. Analysis on sedimentary facies of Chang 7 Member in Yanchang Formation of Triassic in Ordos Basin[J]. Acta Sedimentologica Sinica, 2010, 28 (2): 254- 262.
2	张文正, 杨华, 杨伟伟, 等. 鄂尔多斯盆地延长组长7湖相页岩油地质特征评价[J]. 地球化学, 2015, 44 (5): 505- 515. doi: 10.3969/j.issn.0379-1726.2015.05.010
	Zhang Wenzheng , Yang Hua , Yang Weiwei , et al. Assessment of geological characteristics of lacustrine shale oil reservoir in Chang7 Member of Yanchang Formation, Ordos Basin[J]. Geochimica, 2015, 44 (5): 505- 515. doi: 10.3969/j.issn.0379-1726.2015.05.010
3	郭彦如, 刘俊榜, 杨华, 等. 鄂尔多斯盆地延长组低渗透致密岩性油藏成藏机理[J]. 石油勘探与开发, 2012, 39 (4): 417- 425.
	Guo Yanru , Liu Junbang , Yang Hua , et al. Hydrocarbon accumulation mechanism of low permeable tight lithologic oil reservoirs in the Yangchang Formation, Ordos Basin, China[J]. Petroleum Exploration and Development, 2012, 39 (4): 417- 425.
4	楚美娟, 李士祥, 刘显阳, 等. 鄂尔多斯盆地延长组长8油层组石油成藏机理及成藏模式[J]. 沉积学报, 2013, 31 (4): 683- 692.
	Chu Meijuan , Li Shixiang , Liu Xianyang , et al. Accumulation mechanisms and modes of Yangchang Formation Chang 8 interval hydrocarbons in Ordos Basin[J]. Acta Sedimentologica Sinica, 2013, 31 (4): 683- 692.
5	范柏江, 梅启亮, 王小军, 等. 泥岩与页岩地化特征对比——以鄂尔多斯盆地安塞地区延长组7段为例[J]. 石油与天然气地质, 2020, 41 (6): 5- 14.
	Fan Bojiang , Mei Qiliang , Wang Xiaojun , et al. Geochemical comparison of mudstone and shale-A case study of the 7th member of Yanchang Formation in Ansai area, Ordos Basin[J]. Oil & Gas Geology, 2020, 41 (6): 5- 14.
6	柳广弟, 杨伟伟, 冯渊, 等. 鄂尔多斯盆地陇东地区延长组原油地球化学特征及成因类型划分[J]. 地学前缘, 2013, 20 (2): 108- 115.
	Liu Guangdi , Yang Weiwei , Feng Yuan , et al. Geochemical characte-ristics and genetic types of crude oil from Yanchang Formation in Longdong Area, Ordos Basin[J]. Earth Science Frontiers, 2013, 20 (2): 108- 115.
7	邓南涛, 张枝焕, 鲍志东, 等. 鄂尔多斯盆地南部延长组有效烃源岩地球化学特征及其识别标志[J]. 中国石油大学学报: 自然科学版, 2013, 37 (2): 135- 145. doi: 10.3969/j.issn.1673-5005.2013.02.023
	Deng Nantao , Zhang Zhihuan , Bao Zhidong , et al. Geochemical fearures and identificatin marks for efficient source rocks of Yanchang Formation in Southern Ordos Basin[J]. Journal of China University of Petroleum: Natural Science Edition, 2013, 37 (2): 135- 145. doi: 10.3969/j.issn.1673-5005.2013.02.023
8	杨亚南, 周世新, 李靖, 等. 鄂尔多斯盆地南缘延长组烃源岩地球化学特征及油源对比[J]. 天然气地质科学, 2017, 28 (4): 550- 565.
	Yang Yanan , Zhou Shixin , Li Jing , et al. Geochemical characteristics of source rocks and oil-source correlation of Yanchang Formation in Southern Ordos Basin, China[J]. Natural Gas Geology, 2017, 28 (4): 550- 565.
9	高辉, 何梦卿, 赵鹏云, 等. 鄂尔多斯盆地长7页岩油与北美地区典型页岩油地质特征对比[J]. 石油实验地质, 2018, 40 (2): 133- 140.
	Gao Hui , He Mengqing , Zhao Pengyun , et al. Comparison of geolo-gical characteristics between Chang 7 Shale Oil in Ordos Basin and typical shale oil in North America[J]. Petroleum Geology & Experiment, 2018, 40 (2): 133- 140.
10	郭凯. 鄂尔多斯盆地陇东地区长7段有效烃源岩及生排烃研究[J]. 石油实验地质, 2017, 39 (1): 15- 23.
	Guo Kai . Active Source Rocks of Chang 7 Member and hydrocarbon generation and expulsion characteristics in Longdong Area, Ordos Basin[J]. Petroleum Geology & Experiment, 2017, 39 (1): 15- 23.
11	张海, 雷华伟, 张涛, 等. 鄂尔多斯盆地靖边油田西部延9原油地球化学特征与油源[J]. 石油实验地质, 2018, 40 (6): 836- 842.
	Zhang Hai , Lei Huawei , Zhang Tao , et al. Geochemical characteristics of Yan 9 crude oil and oil-source correlation in western Jingbian Oil Field, Ordos Basin[J]. Petroleum Geology & Experiment, 2018, 40 (6): 836- 842.
12	陈建平, 孙永革, 钟宁宁, 等. 地质条件下湖相烃源岩生排烃效率与模式[J]. 地质学报, 2014, 88 (11): 2005- 2032.
	Chen Jianping , Sun Yongge , Zhong Ningning , et al. The efficiency and model of petroleum expulsion from the lacustrine source rocks within geological frame[J]. Acta Geologica Sinica, 2014, 88 (11): 2005- 2032.
13	Fan Bojiang , Shi Liang . Deep-lacustrine shale heterogeneity and its impact on hydrocarbon generation, expulsion, and retention: A case study from the Upper Triassic Yanchang Formation, Ordos Basin, China[J]. Natural Resources Research, 2019, 28 (1): 241- 257. doi: 10.1007/s11053-018-9387-2
14	范柏江, 董月霞, 庞雄奇. 有效源岩的精确厘定及其排烃量: 以南堡凹陷为例[J]. 中南大学学报(自然科学版), 2012, 43 (1): 229- 237.
	Fan Bojiang , Dong Yuexia , Pang Xiongqi . Desorption analysis of shale and its geochemical characteristics: A case study of the Chang 7 Member Shale in the Central South Ordos Basin[J]. Journal of China University of Mining & Technology, 2012, 46 (3): 554- 562.
15	李微, 庞雄奇, 赵正福, 等. 松辽盆地青一段常规与非常规油气资源评价[J]. 中国海上油气, 2018, 30 (5): 46- 54.
	Li Wei , Pang Xiongqi , Zhao Zhengfu , et al. Evaluation on the conventional and unconventional oil and gas resources in K1qn1 of Sondliao Basin[J]. China Offshore Oil and Gas, 2018, 30 (5): 46- 54.
16	吴康军, 刘洛夫, 徐正建, 等. 鄂尔多斯盆地长7段致密油成藏物性下限研究[J]. 石油实验地质, 2016, 38 (1): 63- 69.
	Wu Kangjun , Liu Luofu , Xu Zhengjian , et al. Study on lower limit of tight oil reservoir forming property in Chang 7 Member of Ordos Basin[J]. Petroleum Geology & Experiment, 2016, 38 (1): 63- 69.
17	骆垠山, 张哨楠, 罗小明, 等. 鄂尔多斯盆地富县地区延长组原油生物标志物特征及油源对比[J]. 科技导报, 2016, 34 (2): 129- 134.
	Luo Yinshan , Zhang Shaonan , Luo Xiaoming , et al. Biomarker characteristics and oil-source correlation of the Yanchang Crude Oil in Fuxian Area, Ordos Basin[J]. Science & Technology Review, 2016, 34 (2): 129- 134.
18	董丽红, 杜彦军, 李军, 等. 鄂尔多斯盆地中部延长组烃源岩生物标志化合物特征[J]. 西安科技大学学报, 2018, 34 (4): 604- 610.
	Dong Lihong , Du Yanjun , Li Jun , et al. Biomarker characteristics of hydrocarbon source rocks of Yanchang Formation in Central Ordos Basin[J]. Journal of Xi'an University of Science and Technolody, 2018, 34 (4): 604- 610.
19	张翔宇. 陆相烃源岩的地球化学评价标准之有机质类型简析[J]. 化工管理, 2014, 29, 64.
	Zhang Xiangyu . Analysis of Organic matter types in geochemical evaluation ccriteria of continental source rocks[J]. Chemical Management, 2014, 29, 64.
20	朱扬明, 顾圣啸, 李颖, 等. 四川盆地龙潭组高热演化烃源岩有机质生源及沉积环境探讨[J]. 地球化学, 2012, 41 (1): 35- 44. doi: 10.3969/j.issn.0379-1726.2012.01.004
	Zhu Yangming , Gu Shengxiao , Li Ying , et al. Biological Organic source and depositional environment of over-mature source rocks of Longtan Formation in Sichuan Basin[J]. Geochemica, 2012, 41 (1): 35- 44. doi: 10.3969/j.issn.0379-1726.2012.01.004
21	江怀友, 鞠斌山, 李治平, 等. 世界页岩气资源现状研究[J]. 中外能源, 2014, 19 (3): 14- 22.
	Jiang Huaiyou , Ju Binshan , Li Zhiping , et al. A study on the world's shale gas resources today[J]. Sino-global Energy, 2014, 19 (3): 14- 22.
22	Chen Z , Osadetz K G . An assessment of tight oil resource potential in Upper Cretaceous Cardium Formation, Western Canada Sedimentary Basin[J]. Petroleum Exploration & Development Online, 2013, 40 (3): 344- 353.
23	罗鹏, 吉利明. 陆相页岩气储层特征与潜力评价[J]. 天然气地球科学, 2013, 24 (5): 1060- 1068.
	Luo Peng , Ji Liming . Reservoir characteristics and potential evaluation of continental shale gas[J]. Natural Gas Geoscience, 2013, 24 (5): 1060- 1068.
24	赵静. 陆相页岩气成藏条件分析——以松辽盆地南部S洼槽为例[J]. 断块油气田, 2019, 26 (3): 290- 293, 313.
	Zhao Jing . Accumulation conditions of shale gas in continental facies: taking S Depression of Songliao Basin as an example[J]. Fault-Block Oil and Gas Field, 2019, 26 (3): 290- 293, 313.
25	袁伟, 柳广弟, 徐黎明, 等. 鄂尔多斯盆地延长组7段有机质富集主控因素[J]. 石油与天然气地质, 2019, 40 (2): 326- 334.
	Yuan Wei , Liu Guangdi , Xu Liming , et al. Main controlling factors for organic matter enrichment in Chang 7 member of the Yanchang Formation, Ordos Basin[J]. Oil & Gas Geology, 2019, 40 (2): 326- 334.
26	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.
27	张洪洁, 王凤琴, 刘航, 等. 鄂尔多斯盆地东南部长7段页岩气含气量及影响因素[J]. 新疆石油地质, 2019, 40 (6): 666- 672.
	Zhang Hongjie , Wang Fengqin , Liu Hang , et al. Shale gas content and its influencing factors in Chang 7 member of Southeastern Ordos basin[J]. Xinjiang Petroleum Geology, 2019, 40 (6): 666- 672.
28	李志明, 陶国亮, 黎茂稳, 等. 鄂尔多斯盆地西南部彬长区块三叠系延长组7段3亚段页岩油勘探前景探讨[J]. 石油与天然气地质, 2019, 40 (3): 558- 570.
	Li Zhiming , Tao Guoliang , Li Maowen , et al. Discussion on prospecting potential of shale oil in the 3rd sub-member of the Triassic Chang 7 member in Binchang block, southwestern Ordos Basin[J[J]. Oil & Gas Geology, 2019, 40 (3): 558- 570.
29	蔡振家, 雷裕红, 罗晓容, 等. 鄂尔多斯盆地东南部延长组7段页岩有机孔发育特征及其影响因素[J]. 石油与天然气地质, 2020, 41 (2): 367- 379.
	Cai Zhenjia , Lei Yuhong , Luo Xiaorong , et al. Characteristics and controlling factors of organic pores in the 7th member of Yanchang Formation shale in the Southeastern Ordos Basin[J]. Oil & Gas Geology, 2020, 41 (2): 367- 379.
30	张文正, 杨华, 彭平安, 等. 晚三叠世火山活动对鄂尔多斯盆地长7优质烃源岩发育的影响[J]. 地球化学, 2009, 38 (6): 573- 582. doi: 10.3321/j.issn:0379-1726.2009.06.007
	Zhang Wenzheng , Yang Hua , Peng Pingan , et al. The influence of Late Triassic volcanism on the development of Chang 7 high grade hydrocarbon source rock in Ordos Basin[J]. Geochemica, 2009, 38 (6): 573- 582. doi: 10.3321/j.issn:0379-1726.2009.06.007

深度/m	排烃率/ (mg·g^-1)	密度/ (g·cm^-3)	暗色泥岩厚度/ m	排烃强度/ (10⁴ t·km^-2)	单层排烃效率/%	面积/km²	残留烃量/ (10⁸ t)	排烃量/ (10⁸t)
1 250	0	2.53	1.0	0	0	88	0.53	0
1 450	120	2.53	3.0	36.43	20	79	1.15	0.29
1 650	150	2.53	2.0	30.36	25	95	0.86	0.29
1 850	270	2.53	1.5	40.98	45	123	0.62	0.50
2 050	330	2.53	2.0	66.79	55	137	0.75	0.92
2 250	390	2.53	2.0	78.94	65	115	0.49	0.91
2 450	450	2.53	1.5	68.31	75	68	0.15	0.46

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