Citation: | LI Yinglie, WU Xinhe, YI Haisheng, XIA Xianghua, WANG Rui, CAO Jie. Discovery of hydrocarbon display zone and its exploration significance in the eastern Nima basin, Tibet[J]. Geological Bulletin of China, 2021, 40(5): 745-752. |
In the field geological survey, an oil and gas belt about 55 km long was found in the Zikangle-Kanggale area in the eastern part of Nima Basin, which is hosted in the Cretaceous Jingzhushan Formation.Outcrop studies and geochemical analysis of 24 collected samples indicate that the organic carbon content is high, with an average TOC content of 1.32% and an average potential of generating hydrocarbon of 7.38 mg/g, 12 samples of which have TOC higher than 1%, with moderate compositional maturity, suggesting to be good-very good source rock grade.It is concluded that the hydrocarbon generation conditions of the Saibucuo Depression in the eastern Nima basin are better than those of the Dazecuo Depression.Saibucuo Depression can be considered as the next key target for exploration in this basin.The discovery of this oil and gas belt can provide a basis for the stratigraphic correlation between the Nima basin and Lunpola basin, and open up a new direction for the hydrocarbon exploration.
[1] | 宋博文, 徐亚东, 梁银平, 等. 中国西部新生代沉积盆地演化[J]. 地球科学, 2014, 39(8): 1036-1044. |
[2] | 高瑞祺, 赵政璋. 中国油气新区勘探, 第六卷, 青藏高原石油地质[M]. 北京: 石油工业出版社, 2001: 224-231. |
[3] | 艾华国, 兰林英, 朱宏泉, 等. 伦坡拉第三纪盆地的形成机理及石油地质特征[J]. 石油学报, 1998, 19(2): 21-27. doi: 10.3321/j.issn:0253-2697.1998.02.004 |
[4] | 付孝悦, 张修富. 西藏高原石油地质[M]. 北京: 石油工业出版社, 2005: 71-80. |
[5] | 李英烈. 伍新和, 汪锐, 等. 西藏伦坡拉盆地中央凹陷带探获油气[J]. 中国地质, 2018, 45(4): 853-854. |
[6] | 李英烈. 伍新和, 汪锐, 等. 西藏伦坡拉盆地旺2井钻获油气发现[J]. 中国地质, 2019, 46(3): 662-663. |
[7] | 蒋忠惕, 张家强, 王德杰. 西藏尼玛地区油气显示的发现及意义[J]. 地质通报, 2006, 25(9/10): 1189-1193. doi: 10.3969/j.issn.1671-2552.2006.09.034 |
[8] | 李亚林, 王成善, 朱利东, 等. 西藏尼玛盆地油页岩的发现及其地质意义[J]. 地质通报, 2010, 29(12): 1873-1874. |
[9] | 孙涛, 王成善, 李亚林, 等. 西藏尼玛盆地古近系牛堡组烃源岩生烃能力及分子地球化学特征[J]. 矿物岩石地球化学通报, 2013, 32(2): 243-251. doi: 10.3969/j.issn.1007-2802.2013.02.010 |
[10] | Kapp P, DeCelles P G, Gehrels G E, et al. Geological records of the Lhasa-Qiangtang and Indo-Asian collisions in the Nima area of central Tibet[J]. GSA Bulletin, 2007, 119(7/8): 917-933. |
[11] | DeCelles P G, Quade J, Kapp P, et al. High and dry in centralTibet during the late Oligocene[J]. Earth and PlanetaryScience Letters, 2007, 253: 389-401. doi: 10.1016/j.epsl.2006.11.001 |
[12] | 王波明, 周家声, 闻涛, 等. 西藏尼玛盆地陆相地层归属及其油气意义[J]. 天然气技术, 2009, 3(4): 21-24. |
[13] | 肖序常, 王军. 青藏高原构造演化及隆升的简要评述[J]. 地质论评, 1998, 44(4): 372-381. doi: 10.3321/j.issn:0371-5736.1998.04.006 |
[14] | DeCelles P G, Kapp P, Ding L, et al. Late Cretaceous to middleTertiary basin evolution in the central Tibetan Plateau: Changingenvironments in response to tectonic partitioning, aridification, andregional elevation gain[J]. GSA Bulletin, 2007, 119(5/6): 654-680. |
[15] | 卢志友, 杨文光, 朱利东, 刘和, 陶刚, 欧阳慧子. 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 |
[16] | 王剑, 谭富文, 李亚林, 等. 青藏高原重点沉积盆地油气资源潜力分析[M]. 北京: 地质出版社, 2004: 284-285. |
[17] | 陈国荣, 刘鸿飞, 蒋光武, 等. 西藏班公湖-怒江结合带中段沙木罗组的发现[J]. 地质通报, 2004, 23(2): 193-194. |
[18] | 李桂林, 田玉昆, 尹吴海等. 西藏高原地区低频可控震源高密度宽线地震采集技术攻关与应用——以尼玛盆地低频可控震源采集为例[J]. 地球物理学进展, 2019, 34(1): 113-118. |
[19] | 秦建中, 刘宝泉, 国建英, 等. 关于碳酸盐烃源岩的评价标准[J]. 石油实验地质, 2004, 26(3): 281-286. doi: 10.3969/j.issn.1001-6112.2004.03.012 |
[20] | 秦建中, 刘宝泉. 海相不同类型烃源岩生排烃模式研究[J]. 石油实验地质, 2005, 27(1): 74-80. |
[21] | 邓涛, 王世骐, 颉光普, 等. 藏北伦坡拉盆地丁青组哺乳动物化石对时代和古高度的指示[J]. 科学通报, 2011, 56(34): 2873-2880. |
[22] | 李英烈, 伍新和, 汪锐. 西藏尼玛盆地发现多种化石: 地层划分新证据[J]. 中国地质, 2018, 45(6): 230-231. |
[23] | 曾胜强, 陈文彬, 付修根, 等. 青藏高原尼玛盆地东部古近系昆虫化石的发现及其对古气候的指示[J]. 地质通报, 2020, 39(7): 1121-1124. |
① | 伍新和, 汪锐, 李英烈, 等. 伦坡拉、尼玛与措勤盆地油气基础地质调查2016年项目成果报告. 中国地质调查局油气资源调查中心, 2016. |
② | 夏响华, 李英烈, 伍新和, 等. 西藏尼玛盆地油气基础地质调查项目成果报告. 中国地质调查局油气资源调查中心, 2015. |
Geological sketch map of Nima basin
Distribution of geological survey sites in the eastem Nima basin
Asphalt and oil shale field outcrop of Nima basin
Stratigraphic column of Jingzhushan Formation in Kanggala area of Nima basin
Stratigraphic column of 1000~1100 m in the Second Sector of Niubao Formation, well Zangnidi 1