Geological characteristics and exploration potential evaluation of Chang 7 lacustrine shale oil in Yanchang Formation, Fuxian area, Ordos Basin

doi:10.3969/j.issn.1672-7703.2018.06.004

Abstract

Abstract: Based on spatial distribution, petrophysics, hydrocarbon generation, reservoir conditions and hydrocarbon retention, the geological characteristics of the Chang 7 lacustrine shale oil in the Yanchang Formation in the Fuxian area of the Ordo Basin was studied for evaluating the exploration potential, and selecting favorable targets. The study shows that the Chang 7 shale is widely distributed, the sandy laminae in the shale is developed, and the black shale containing silty laminae is the optimal lithofacies for shale oil. The statistics of geochemical parameters (pyrolysis S₁, chloroform asphalt "A", TOC, R_o, free hydrocarbon content, etc.), reservoir conditions, hydrocarbon-bearing properties indicate that lacustrine shale has the conditions for shale oil enrichment and accumulation. The shale oil resource calculated with pyrolysis S₁ is 12.94×10⁸ tons. According to comprehensive evaluation on the oil potential, reservoir capacity, shale oil mobility, etc., the favorable exploration area is up to 452 km².

Key words: shale oil, geological characteristics, exploration potential evaluation, Chang 7 of Yanchang Formation, Ordos Basin, Fuxian area

CLC Number:

Sun Jianbo, Sun Binghua, Zhao Qianping, Jiang Chengfu, Liu Gang, Yin Jintao, Gao Chao, Guo Chao. Geological characteristics 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.

References

[1] 罗承先.页岩气开发可能改变世界石油形势[J].中外能源,2011, 16(12):22-26. Luo Chengxian. Shale oil development may chang the landscape in the world's oil market[J].Sino-Global Energy,2011,16(12):22-26.
[2] 张金川,林腊梅,李玉喜,唐玄,朱亮亮,邢雅文,等.页岩油分类与评价[J].地学前缘,2012,19(5):322-331. Zhang Jinchuan, Lin Lamei, Li Yuxi, Tang Xuan, Zhu Liangliang, Xing Yawen, et al. Classification and evaluation of shale oil[J].Earth Science Frontiers, 2012,19(5):322-331.
[3] 林森虎,邹才能,袁选俊,杨智.美国致密油开发现状及启示[J].岩性油气藏,20l1,23(4):25-30. Lin Senhu,Zou Caineng,Yuan Xuanjun,Yang Zhi.Status quo of tight oil exploitation in the United States and its implication[J].Lithologic Reservoirs,2011,23(4):25-30.
[4] 卢雪梅.美国致密油成开发新热点[N].中国石化报,2011-12-30(5). Lu Xuemei. Tight oil became the new hot spot of petroleum development in USA[N].China Petrochemical News, 2011-12-30(5).
[5] 邹才能,陶士振,侯连华.非常规油气地质[M].北京:地质出版社,2011:1-3l0. Zou Caineng, Tao Shizhen, Hou Lianhua. Unconventional petroleum geology[M].Beijing:Geological Publishing House, 2011:1-3l0.
[6] 罗承先,周韦慧.美国页岩油开发现状及其巨大影响[J].中外能源,2013,18(3):3-40. Luo Chengxian,Zhou Weihui.Shale oil development in US and implications[J].Sino-Global Energy,2013,l8(3):3-40.
[7] 汪天凯,何文渊,袁余洋,许坤,李国昊,李丰,等. 美国页岩油低油价下效益开发新进展及启示[J].石油科技论坛,2017,36(2):60-68. Wang Tiankai, He Wenyuan, Yuan Yuyang, Xu Kun, Li Guohao, Li Feng, et al. Latest development in US cost-effective development of shale oil under background of low oil prices[J]. Oil Forum, 2017,36(2):60-68.
[8] 陈祥,王敏,严永新,章新文,罗曦,张永华.泌阳凹陷陆相页岩油气成藏条件[J].石油与天然气地质,201l,32(4):568-57. Chen Xiang,Wang Min,Yan Yongxin,Zhang Xinwen,Luo Xi,ZhangYonghua.Accumulation conditions for continental shale oil and gas in the Biyang Depression[J].Oil & Gas Geology, 2011,32(4):568-576.
[9] 杨智,付金华,郭秋麟,林森虎,陈宁生,潘松圻,等.鄂尔多斯盆地三叠系延长组陆相致密油发现、特征及潜力[J].中国石油勘探, 2017,22(6):9-15. Yang Zhi, Fu Jinhua, Guo Qiulin, Lin Senhu, Chen Ningsheng, Pan Songqi, et al. Discovery, characteristics and resource potential of continental tight oil in Triassic Yanchang Formation, Ordos Basin[J]. China Petroleum Exploration, 2017,22(6):9-15.
[10] 周志,阎玉萍,任收麦,乔德武,郭天旭,王浩.松辽盆地页岩油勘探前景与对策建议[J].中国矿业,2017,26(3):171-173. Zhou Zhi, Yan Yuping, Ren Shoumai, Qiao Dewu, Guo Tianxu, Wang Hao. Prospects and strategy for shale oil exploration in Songliao Basin,China[J].China Mining Magazine, 2017,26(3):171-173.
[11] 孙焕泉.济阳坳陷页岩油勘探实践与认识[J].中国石油勘探,2017, 22(4):1-14. Sun Huanquan. Exploration practice and cognitions of shale oil in Jiyang depression[J]. China Petroleum Exploration, 2017, 22(4):1-14.
[12] 黄爱华,薛海涛,王民,王文广,颜鑫桐,卢双舫,等.东濮凹陷沙三下亚段页岩油资源潜力评价[J].长江大学学报:自然科学版,2017,14(3):1-6. Huang Aihua, Xue Haitao, Wang Min, Wang Wenguang, Yan Xintong, Lu Shuangfang, et al. Resource potential evaluation of shale oil in Es3¹, Dongpu depression[J].Journal of Yangtze University:Natural Science Edition, 2017,14(3):1-6.
[13] 杨智,侯连华,林森虎,罗霞,张丽君,吴松涛,等.吉木萨尔凹陷芦草沟组致密油、页岩油地质特征与勘探潜力[J].中国石油勘探, 2018,23(4):76-85. Yang Zhi, Hou Lianhua, Lin Senhu, Luo Xia, Zhang Lijun, Wu Songtao, et al. Geologic characteristics and exploration potential of tight oil and shale oil in Lucaogou Formation in Jimsar sag[J]. China Petroleum Exploration, 2018,23(4):76-85.
[14] 杜金虎,杨涛,李欣.中国石油天然气股份有限公司"十二五"油气勘探发现与"十三五"展望[J].中国石油勘探,2016,21(2):1-15. Du Jinhu, Yang Tao, Li Xin.Oil and gas exploration and discovery of PetroChina Company Limited during the 12th Five-Year Plan and the prospect during the 13th Five-Year Plan[J]. China Petroleum Exploration, 2016,21(2):1-15.
[15] 张文正,杨华,杨伟伟,吴凯,刘飞.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. Zhang Wenzheng, Yang Hua, Yang Weiwei, Wu Kai, Liu Fei. Assessment of geological characteristics of lacustrine shale oil reservoir in Chang7 Member of Yanchang Formation,Ordos Basin[J].Geochimica, 2015,44(5):505-515.
[16] 杨华,牛小兵,徐黎明,冯胜斌,尤源,梁晓伟,等.鄂尔多斯盆地三叠系长7段湖相页岩油勘探潜力[J].石油勘探与开发,2016,43(4):511-520. Yang Hua, Niu Xiaobing, Xu Liming, Feng Shengbin, You Yuan, Liang Xiaowei, et al. Exploration potential of shale oil in Chang7 Member,Upper Triassic Yanchang Formation,Ordos Basin NW China[J] Petroleum Exploration and Development,2016,43(4):511-520.
[17] 杨俊杰.鄂尔多斯盆地构造演化与油气分布规律[M].北京:石油工业出版社,2011:36-37. Yang Junjie. Structural evolution and hydrocarbon distribution of Ordos Basin[M].Beijing:Petroleum Industry Press, 2001:36-37.
[18] 杨华,窦伟坦,刘显阳,张才利.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, Zhang Caili. Analysis on sedimentary facies of Member 7 in Yanchang Formation of Triassic in Ordos Basin[J]. Acta Sedimentologica Sinica, 2010, 28(2):254-263.
[19] 王香增,高胜利,高潮.鄂尔多斯盆地南部中生界陆相页岩气地质特征[J].石油勘探与开发,2014,41(3),294-304. Wang Xiangzeng, Gao Shengli, Gao Chao. Geological features of Mesozoic continental shale gas in south of Ordos Basin, NW China[J]. Petroleum Exploration and Development, 2014, 41(3):294-304.
[20] 陈祥,王敏,严永新,章新文,罗曦,张永华.泌阳凹陷陆相页岩油气成藏条件[J].石油与天然气地质,201l,32(4):568-576. Chen Xiang, Wang Min, Yan Yongxin, Zhang Xinwen, Luo Xi, Zhang Yonghua. Accumulation conditions for continental shale oil and gas in the Biyang depression[J]. Oil & Gas Geology, 2011,32(4):568-576.
[21] 章新文,余志远,黄庆,谭静娟,王优先,江本宏.泌阳凹陷陆相页岩油富集主控因素分析[J].石油地质与工程,2013,27(3):5-l1. Zhang Xinwen, Yu Zhiyuan, Huang Qing, Tan Jingjuan, Wang Youxian, Jiang Benhong. Discussion on main controlling factors of continental shale oil enrichment in Biyang depression[J].Petroleum Geology and Engineering,2013,27(3):5-11.
[22] Jarvie, D M. Shale resource systems for oil and gas:Part 2-Shale-oil resource systems[J]. AAPG Memoir 2012,97:89-119.
[23] 王香增,刘国恒,黄志龙,孙兵华,史鹏,杨潇.鄂尔多斯盆地东南部延长组长7段泥页岩储层特征[J].天然气地球科学,2015, 26(7):1385-1394. Wang Xiangzeng, Liu Guoheng, Huang Zhilong, Sun Binghua, Shi Peng, Yang Xiao. The characteristics of shale reservoir of the No.7 Members in Yanchang Formation of southeast Ordos Basin[J] Natural Gas Geoscience, 2015,26(7):1385-1394.
[24] 卢双舫,黄文彪,陈方文,李吉君,王民,薛海涛,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 Wenbiao, Chen Fangwen, Li Jijun, Wang Min, Xue Haitao, 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] 蒋启贵,黎茂稳,钱门辉,李志明,李政,黄振凯,等.不同赋存状态页岩油定量表征技术与应用研究[J].石油实验地质,2016,38(6):842-849. Jiang Qigui, Li Maowen, Qian Menhui, Li Zhiming, Li Zheng, Huang Zhenkai, et al. Quantitative characterization of shale oil in different occurrence states and its application[J]. Petroleum Geology & Experiment, 2016,38(6):842-849.
[26] 李吉君,史颖琳,章新文,陈祥,严永新,朱景修,等.页岩油富集可采主控因素分析:以泌阳凹陷为例[J].地球科学——中国地质大学学报,2014,39(7):848-857. Li Jijun, Shi Yinglin, Zhang Xinwen, Chen Xiang, Yan Yongxin, Zhu Jingxiu, et al. Control factors of enrichment and producibility of shale oil:a case study of Biyang depression[J]. Earth Science-Journal of China University of Geosciences, 2014,39(7):848-857.
[27] Loucks R G, Reed R M, Ruppel S C, Jarvie D M. Morphology, genesis, and distribution of nanometer-scale pores in siliceous mudstones of the Mississippian Barnett Shale[J]. Journal of Sedimentary Research, 2009,79:848-861.