鄂尔多斯盆地中部三叠系延长组7段湖相页岩油勘探潜力

doi:10.11743/ogg20210506

Abstract

Abstract:

The Chang 7 member (the seventh member of Yanchang Formation) lacustrine shale in the central Ordos Basin is largely thin and made up of either pure shale or shale interbedded with sandy laminas or thin sand layers of shallow to semi-deep lake facies.Its high content of sand seems quite ideal for achieving positive stimulation responses through fracturing.A discussion and comparison of shale oil exploration targets in the area is recommended for gaining such response.However, no such efforts have been made so far.To judge the oil potential of the shale, samples are collected from both pure shale and shale interbeded with sandy lamina to compare hydrocarbon generation and hydrocarbon expulsion capacities based on geochemical tests and analyses.The results show that shale mainly composed of sapropelic organic matter has higher organic matter abundance than shale interbeded with sandy lamina composed of mixed organic matters.Both are at a low to moderate maturity stage but shale interbeded with sandy lamina is inferior to pure shale in terms of hydrocarbon generation capacity.Both can effectively expel hydrocarbons.Shale interbeded with sandy lamina contains oil at 7.22 mg/g and pure shale 9.42 mg/g.Both can be economically developed and share similar oil saturation index, indicating great oil potential.

Key words: sandy laminas, shale, shale oil, exploration potential, Yanchang Formation, Ordos Basin

CLC Number:

TE122.1

Bojiang Fan, Yue Jin, Liang Shi, Yating Li, Weichang Chen. Shale oil exploration potential in central Ordos Basin: A case study of Chang 7 lacustrine shale[J]. Oil & Gas Geology, 2021, 42(5): 1078-1088.

Figures/Tables 12

Fig.1

Fig.2

Table 1

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Table 2

References 30

1	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.
2	韩载华, 赵靖舟, 孟选刚, 等. 鄂尔多斯盆地三叠纪湖盆东部"边缘"长7段烃源岩的发现及其地球化学特征[J]. 石油实验地质, 2020, 42 (6): 991- 1000.
	Han Zaihua , Zhao Jingzhou , Meng Xuangang , et al. Discovery and geochemical characteristics of Chang 7 source rocks from the eastern margin of a Triassic lacustrine basin in the Ordos Basin[J]. Petroleum Geology & Experiment, 2020, 42 (6): 991- 1000.
3	孙建博, 孙兵华, 赵谦平, 等. 鄂尔多斯盆地富县地区延长组长7湖相页岩油地质特征及勘探潜力评价[J]. 中国石油勘探, 2018, 23 (6): 29- 37. doi: 10.3969/j.issn.1672-7703.2018.06.004
	Sun Jianbo , Sun Binghua , Zhao Qianping , et al. Geological characte-ristics and exploration potential evaluation of Chang 7 lacustrine shale oil in Yanchang Formation, Fuxian area, Ordos Basin[J]. China Petroleum Exploration, 2018, 23 (6): 29- 37. doi: 10.3969/j.issn.1672-7703.2018.06.004
4	杨潇, 姜呈馥, 孙兵华, 等. 砂质纹层的发育特征及对页岩储层物性的影响——以鄂尔多斯盆地南部中生界延长组为例[J]. 延安大学学报: 自然科学版, 2015, 34 (2): 18- 23.
	Yang Xiao , Jiang Chengfu , Sun Binghua , et al. The sandy laminar characteristics and its effect on reservoir property of shale: A case study from the Upper Triassic Yanchang Fm in Southern Ordos Basin[J]. Journal of Yanan University(Natural science Edition), 2015, 34 (2): 18- 23.
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	师良, 王香增, 范柏江, 等. 鄂尔多斯盆地延长组砂质纹层发育特征与油气成藏[J]. 石油与天然气地质, 2018, 39 (3): 522- 530.
	Shi Liang , Wang Xiangzeng , Fan Bojiang , et al. Characteristics of sandy lamination and its hydrocarbon accumulation, Yanchang Formation, Ordos Basin[J]. Oil and Gas Geology, 2018, 39 (3): 522- 530.
7	Fan B J , Shi L . 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
8	时贤, 蒋恕, 卢双舫, 等. 利用纳米压痕实验研究层理性页岩岩石力学性质——以渝东南酉阳地区下志留统龙马溪组为例[J]. 石油勘探与开发, 2019, 46 (1): 158- 167.
	Shi Xian , Jiang Shu , Lu Shuangfang , et al. Investigation of mechanical properties of bedded shale by nanoindentation tests: A case study on Lower Silurian Longmaxi Formation of youyang area in southeast Changqing China[J]. Petroleum Exploration and Development, 2019, 46 (1): 158- 167.
9	程明, 罗晓容, 雷裕红, 等. 鄂尔多斯盆地张家滩页岩粉砂质夹层/纹层分布、分形特征和估算方法研究[J]. 天然气地球科学, 2015, 26 (5): 845- 852.
	Cheng Ming , Luo Xiaorong , Lei Yuhong , et al. The distribution, fractal characteristic and thickness estimation of silty laminae and beds in the Zhangjiatan Shale, Ordos Basin[J]. Natural Gas Geoscience, 2015, 26 (5): 845- 852.
10	成海燕, 李安龙, 龚建明. 陆相烃源岩评价参数浅析[J]. 海洋地质前沿, 2008, 24 (2): 6- 10.
	Cheng Haiyan , Li Anlong , Gong Jianming . Appraisal parameters of terrestrial hydrocarbon source rocks[J]. Marine Geology Letters, 2008, 24 (2): 6- 10.
11	Yoann C , Disnar J R , Becq-Giraudon J F . Erroneous maturity assessment given by Tmax and HI Rock-Eval parameters on highly weathered coals[J]. International Journal of Coal Geology, 2002, 49 (1): 57- 65. doi: 10.1016/S0166-5162(01)00065-9
12	ŞenŞamil. 土耳其黑海盆地西部石炭系页岩和煤系非常规油气资源评价[J]. 石油勘探与开发, 2017, 44 (1): 30- 50.
	Sen Samil . Unconventional resource system of the Carboniferous shales and coals of the Western Black Sea Basin of Turkey[J]. Petroleum Exploration and Development, 2017, 44 (1): 30- 50.
13	卢志友, 杨文光, 朱利东, 等. 西藏尼玛盆地古近系牛堡组烃源岩地球化学特征[J]. 地质与勘探, 2018, 54 (5): 1060- 1068. doi: 10.3969/j.issn.0495-5331.2018.05.017
	Lu Zhiyou , Yang Wenguang , Zhu Lidong , et al. Geochemical characteristics of the Paleogene Niubao Formation source rocks in the Nima Basin, Tibet[J]. Geology and Exploration, 2018, 54 (5): 1060- 1068. doi: 10.3969/j.issn.0495-5331.2018.05.017
14	Liu B , Sun J , Zhang Y , et al. Reservoir space and enrichment model of shale oil in the first member of Cretaceous Qingshankou Formation in the Changling sag, southern Songliao Basin, NE China[J]. Petroleum Exploration and Development, 2021, 48 (3): 608- 624. doi: 10.1016/S1876-3804(21)60049-6
15	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): 112- 124.
	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]. Oil & Gas Geology, 2019, 40 (3): 112- 124.
16	刘群, 袁选俊, 林森虎, 等. 湖相泥岩、页岩的沉积环境和特征对比——以鄂尔多斯盆地延长组7段为例[J]. 石油与天然气地质, 2018, 38 (3): 517- 523.
	Liu Qun , Yuan Xuanjun , Lin Senhu , et al. Depositional environment and characteristic comparison between lacustrine mudstone and shale: A case study from the Chang 7 Member of the Yanchang Formation, Ordos Basin[J]. Oil & Gas Geology, 2018, 38 (3): 517- 523.
17	Jia W L , Wang Q L , Liu J X , et al. The effect of oil expulsion or retention on further thermal degradation of kerogen at the high maturity stage: A pyrolysis study of type Ⅱ kerogen from Pingliang shale, China[J]. Organic Geochemistry, 2014, 71, 17- 29. doi: 10.1016/j.orggeochem.2014.03.009
18	黄振凯, 刘全有, 黎茂稳, 等. 鄂尔多斯盆地长7段泥页岩层系排烃效率及其含油性[J]. 石油与天然气地质, 2018, 39 (3): 513- 521.
	Huang Zhenkai , Liu Quanyou , Li Maowen , et al. Hydrocarbon expulsion efficiency and oil-bearing property of the shale system in Chang 7 Member, Ordos Basin[J]. Oil & Gas Geology, 2018, 39 (3): 513- 521.
19	Kelemen S R , Walters C C , Ertas D , et al. Petroleum expulsion part 2.organic matter type and maturity effects on kerogen swelling by solvents and thermodynamic parameters for kerogen from regular solution theory[J]. Energy & Fuels, 2006, 20 (1): 301- 308.
20	谌卓恒, 黎茂稳, 姜春庆, 等. 页岩油的资源潜力及流动性评价方法——以西加拿大盆地上泥盆统Duvernay页岩为例[J]. 石油与天然气地质, 2019, 40 (3): 459- 468.
	Tan Zhuoheng , Li Maowen , Jiang Chunqing , et al. Shale oil resource potential and its mobility assessment: A case study of Upper Devonian Duvernay shale in Western Canada Sedimentary Basin[J]. Oil & Gas Geology, 2019, 40 (3): 459- 468.
21	Behar F , Beaumont V , H L De B Penteado . Rock-Eval 6 technology: performances and development[J]. Oil & Gas Science and Technology, 2002, 56 (2): 111- 134.
22	Jarvie D M. Shale resource systems for oil and gas: part 2-shale-oil resource systems[C]//Breyer A. Shale reservoirs-Giant resources for 21 century. AAPG Memoir 97, 2012: 89-119.
23	Hu T , Pang X Q , Jiang S , et al. Oil content evaluation of lacustrine organic-rich shale with strong heterogeneity: A case study of the Middle Permian Lucaogou Formation in Jimusaer Sag, Junggar Basin, NW China[J]. Fuel, 2018, 221 (2): 196- 205.
24	卢双舫, 黄文彪, 陈方文, 等. 页岩油气资源分级评价标准探讨[J]. 石油勘探与开发, 2012, 39 (2): 249- 256.
	Lu Shuangfang , Huang Wenbin , Chen Fangwen , et al. Classification and evaluation criteria of shale oil and gas resources: Discussion and Application[J]. Petroleum Exploration and Development, 2012, 39 (2): 249- 256.
25	陈佳伟. 东营凹陷页岩油可动性及有利区优选方法研究[D]. 青岛: 中国石油大学(华东), 2017.
	Chen Jiawei. Study on the mobility of shale oil in Dongying depression and the optimization method of favorable area[D]. Qingdao: China University of Petroleum (East China), 2017.
26	付晓飞, 石海东, 蒙启安, 等. 构造和沉积对页岩油富集的控制作用: 以松辽盆地中央坳陷区青一段为例[J]. 大庆石油地质与开发, 2020, 39 (3): 56- 71.
	Fu Xiaofei , Shi Haidong , Meng Qi'an , et al. Controlling effects of the structure and deposition on the shale oil enrichment: Taking Formation qn1 in the Central Depression of Songliao Basin as an instance[J]. Petroleum Geology & Oilfield Development in Daqing, 2020, 39 (3): 56- 71.
27	邵红梅, 高波, 洪淑新, 等. 页岩油储层实验技术进展及应用: 以松辽盆地古龙地区为例[J]. 大庆石油地质与开发, 2020, 39 (3): 97- 106.
	Shao Hongmei , Gao Bo , Hong Shuxin , et al. Progress and application of the experimental technologies for the shale oil reservoirs: A case study on Gulong area in Songliao Basin[J]. Petroleum Geology & Oilfield Development in Daqing, 2020, 39 (3): 97- 106.
28	徐旭辉, 申宝剑, 李志明, 等. 页岩气实验地质评价技术研究现状及展望[J]. 油气藏评价与开发, 2020, 10 (1): 1- 8.
	Xu Xuhui , Shen Baojian , Li Zhiming , et al. Status and prospect of experimental technologies of geological evaluation for shale gas[J]. Reservoir Evaluation and Development, 2020, 10 (1): 1- 8.
29	朱晓萌, 朱文兵, 曹剑, 等. 页岩油可动性表征方法研究进展[J]. 新疆石油地质, 2019, 40 (6): 745- 753.
	Zhu Xiaomeng , Zhu Wenbing , Cao Jian , et al. Research progress on shale oil mobility characterization[J]. Xinjiang Petroleum Geology, 2019, 40 (6): 745- 753.
30	朱德顺. 陆相湖盆页岩油富集影响因素及综合评价方法——以东营凹陷和沾化凹陷为例[J]. 新疆石油地质, 2019, 40 (3): 269- 275.
	Zhu Deshun . Influencing factor analysis and comprehensive evaluation method of lacustrine shale oil: cases from Dongying and Zhanhua sags[J]. Xinjiang Petroleum Geology, 2019, 40 (3): 269- 275.

样号	井号	取心样号或深度	岩性	实测孔隙度/%	渗透率/(10^-3 μm²)	测量方向
1	H36	2-52/54	纯页岩	1.69	0.076	垂直层理方向
2	H36	2-52/54	纯页岩	3.54	0.091	垂直层理方向
3	H36	2-34/54	砂质纹层页岩	3.36	0.036	平行层理方向
4	H36	2-34/54	砂质纹层页岩	3.50	0.491	垂直层理方向
5	C100	814.19 m	砂质纹层页岩	3.74	0.133	垂直层理方向
6	H36	2-45/54	砂质纹层页岩	3.96	0.603	平行层理方向
7	C100	814.19 m	砂质纹层页岩	4.14	-	平行层理方向
8	H36	2-45/54	砂质纹层页岩	5.48	0.255	垂直层理方向
9	X54	1 053.31 m	砂质纹层	7.09	0.923	垂直层理方向
10	X54	1 053.31 m	砂质纹层	7.14	3.583	平行层理方向

井位	压裂改造数/ 段	压裂段长度/m	前置液量/ m³	携砂液量/ m³	工作压力/ MPa	排量/ (m³·min^-1)	进入地层液量/m³	平均产油量/ (m³·d^-1)	平均产气量/ (m³·d^-1)
YCYV1145	6	16	733	935	17~20	12.0	1 668	1.3	1 251
YCCY1112	3	9	250	525	23~28	10.0~12.0	803	3.2	1 276

[1]	Huimin LIU, Youshu BAO, Maowen LI, Zheng LI, Lianbo WU, Rifang ZHU, Dayang WANG, Xin WANG. Geochemical parameters for evaluating shale oil enrichment and mobility： A case study of shales in the Bakken Formation， Williston Basin and the Shahejie Formation， Jiyang Depression [J]. Oil & Gas Geology, 2024, 45(3): 622-636.
[2]	Xiugang PU, Jiangchang DONG, Gongquan CHAI, Shunyao SONG, Zhannan SHI, Wenzhong HAN, Wei ZHANG, Delu XIE. Enrichment model of high-abundance organic matter in shales in the 2^nd member of the Paleogene Kongdian Formation， Cangdong Sag， Bohai Bay Basin [J]. Oil & Gas Geology, 2024, 45(3): 696-709.
[3]	Weitao WU, Yansong FENG, Shixiang FEI, Yifei WANG, Heyuan WU, Xudong YANG. Enrichment factors and play fairway mapping for tight gas in the 5^th member of the Permian Shiqianfeng Formation， Shenmu gas field， Ordos Basin [J]. Oil & Gas Geology, 2024, 45(3): 739-751.
[4]	Rui FANG, Yuqiang JIANG, Changcheng YANG, Haibo DENG, Chan JIANG, Haitao HONG, Song TANG, Yifan GU, Xun ZHU, Shasha SUN, Guangyin CAI. Occurrence states and mobility of shale oil in different lithologic assemblages in the Jurassic Lianggaoshan Formation， Sichuan Basin [J]. Oil & Gas Geology, 2024, 45(3): 752-769.
[5]	Jun LI, Youlong ZOU, Jing LU. Well-log-based assessment of movable oil content in lacustrine shale oil reservoirs： A case study of the 2^nd member of the Paleogene Funing Formation， Subei Basin [J]. Oil & Gas Geology, 2024, 45(3): 816-826.
[6]	Xiaoyu DU, Zhijun JIN, Lianbo ZENG, Guoping LIU, Sen YANG, Xinping LIANG, Guoqing LU. Evaluation of natural fracture effectiveness in deep lacustrine shale oil reservoirs based on formation microresistivity imaging logs [J]. Oil & Gas Geology, 2024, 45(3): 852-865.
[7]	Caineng ZOU, Dazhong DONG, Wei XIONG, Guoyou FU, Qun ZHAO, Wen LIU, Weiliang KONG, Qin ZHANG, Guangyin CAI, Yuman WANG, Feng LIANG, Hanlin LIU, Zhen QIU. Advances， challenges， and countermeasures in shale gas exploration of underexplored plays， sequences and new types in China [J]. Oil & Gas Geology, 2024, 45(2): 309-326.
[8]	Zhe ZHAO, Bin BAI, Chang LIU, Lan WANG, Haiyan ZHOU, Yuxi LIU. Current status， advances， and prospects of CNPC’s exploration of onshore moderately to highly mature shale oil reservoirs [J]. Oil & Gas Geology, 2024, 45(2): 327-340.
[9]	Chenglin LIU, Zhengang DING, Liyong FAN, Rui KANG, Sijie HONG, Yuxin ZHU, Jianfa CHEN, Haidong WANG, Nuo XU. Geochemical characteristics and enrichment factors of helium-bearing natural gas in the Ordos Basin [J]. Oil & Gas Geology, 2024, 45(2): 384-392.
[10]	Junyu WAN, Jianhui ZHU, Suping YAO, Yi ZHANG, Chuntang LI, Wei ZHANG, Haijian JIANG, Jie WANG. Geobiological evaluation of hydrocarbon-generating organisms and source rocks in the Ordovician Majiagou Formation， east-central Ordos Basin [J]. Oil & Gas Geology, 2024, 45(2): 393-405.
[11]	Bo LIU, Qi’an MENG, Xiaofei FU, Tiefeng LIN, Yunfeng BAI, Shansi TIAN, Jinyou ZHANG, Yao YAO, Xinyang CHENG, Zhao LIU. Composition of generated and expelled hydrocarbons and phase evolution of shale oil in the 1^st member of Qingshankou Formation， Songliao Basin [J]. Oil & Gas Geology, 2024, 45(2): 406-419.
[12]	Xiao HE, Maja ZHENG, Yong LIU, Qun ZHAO, Xuewen Shi, Zhenxue Jiang, Wei WU, Ya WU, Shitan NING, Xianglu TANG, Dadong LIU. Characteristics and differential origin of Qiongzhusi Formation shale reservoirs under the “aulacogen-uplift” tectonic setting， Sichuan Basin [J]. Oil & Gas Geology, 2024, 45(2): 420-439.
[13]	Hequn GAO, Yuqiao GAO, Xipeng HE, Jun NIE. Rock mechanical properties and controlling factors for shale oil reservoirs in the second member of the Paleogene Funing Formation， Subei Basin [J]. Oil & Gas Geology, 2024, 45(2): 502-515.
[14]	LiHua YANG, ChiYang LIU, Lei HUANG, Yijun ZHOU, Yongtao LIU, Yang QIN. Discovery of suspected intrusive rock bodies in Gufengzhuang area， Ordos Basin and its geological significance [J]. Oil & Gas Geology, 2024, 45(1): 142-156.
[15]	Liang SHI, Bojiang FAN, Zhonghou LI, Ziwei YU, Zijin LIN, Xinyang DAI. Migration differentiation of hydrocarbon components in the 7^th member of the Triassic Yanchang Formation， central Ordos Basin [J]. Oil & Gas Geology, 2024, 45(1): 157-168.

Shale oil exploration potential in central Ordos Basin: A case study of Chang 7 lacustrine shale

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 12

References 30

Related Articles 15

Recommended Articles

Metrics