Lithologic Reservoirs ›› 2023, Vol. 35 ›› Issue (3): 76-85.doi: 10.12108/yxyqc.20230307

• PETROLEUM EXPLORATION • Previous Articles     Next Articles

Hydrocarbon accumulation models and exploration potential of MesoCenozoic heavy oil in northern Melut Basin，South Sudan

XUE Luo1, SHI Zhongsheng1, MA Lun1, ZHAO Yanjun2, YUE Shijun1, HONG Liang1, WANG Lei1, LEI Ming1   

  1. 1. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China;
    2. China National Oil and Gas Exploration and Development Co., Ltd., CNODC, Beijing 100000, China
  • Received:2022-09-16 Revised:2022-10-10 Online:2023-05-01 Published:2023-04-25

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Abstract: There are various types of heavy oil reservoirs developed in northern Melut Basin， with broad prospects for exploration and development. Through oil-source correlation and hydrocarbon migration and accumulation simulation，the Meso-Cenozoic heavy oil reservoirs in northern Melut Basin were classified，and the accumulation models and main controlling factors of different formations of heavy oil reservoirs were analyzed. The results show that： （1）There are five types of heavy oil reservoirs developed in northern Melut Basin，including structurallithologic heavy oil reservoirs of Neogene Jimidi Formation， fault-block heavy oil reservoirs and stratigraphic unconformity heavy oil reservoirs of Paleogene Yabus Formation， up-dip pinch-out lithologic heavy oil reservoirs of Cretaceous Galhak Formation and fracture heavy oil reservoirs in buried hill.（2）The heavy oil reservoirs of Neogene Jimidi Formation are of secondary origin，with the reservoir accumulation characteristics of far-source faultunconformity migration， which is a structural-lithologic reservoir. Gandool，Dabass and Jammam areas are favorable for heavy oil accumulation.（3）The heavy oil reservoirs of Paleogene Yabus Formation are of secondary origin，of which the stratigraphic unconformity heavy oil reservoirs have limited exploration potential， and the faultblock heavy oil reservoir have the accumulation characteristics of far source fault and sand body step migration. The Jammam fault-step belt in the basin margin is a favorable area for heavy oil exploration. （4）The stratigraphiclithologic heavy oil reservoirs of Cretaceous Galhak Formation are of primary origin， which are mainly controlled by near-source immature to low-mature hydrocarbon source rocks. Braided river delta front at the high part of the sag slope is the main facies belt for the development of stratigraphic-lithologic heavy oil reservoir.

Key words: heavy oil, accumulation model, exploration potential, Jimidi Formation, Yabus Formation, Galhak Formation, Meso-Cenozoic, Melut Basin, South Sudan

CLC Number: 

  • TE122.1
[1] 童晓光,郭建宇,王兆明.非常规油气地质理论与技术进展[J].地学前缘, 2014, 21(1):9-20. TONG Xiaoguang, GUO Jianyu, WANG Zhaoming. The progress of geological theory and technology for unconventional oil and gas[J]. Earth Science Frontiers, 2014, 21(1):9-20.
[2] 邹才能,翟光明,张光亚,等.全球常规-非常规油气形成分布、资源潜力及趋势预测[J].石油勘探与开发, 2015, 42(1):13-25. ZOU Caineng, ZHAI Guangming, ZHANG Guangya, et al. Formation, distribution, potential and prediction of global conventional and unconventional hydrocarbon resources[J].Petroleum Exploration and Development, 2015, 42(1):13-25.
[3] 贾承造.论非常规油气对经典石油天然气地质学理论的突破及意义[J].石油勘探与开发, 2017, 44(1):1-11. JIA Chengzao. Breakthrough and significance of unconventional oil and gas to classical petroleum geological theory[J]. Petroleum Exploration and Development, 2017, 44(1):1-11.
[4] 才业,樊佐春.辽河油田边顶水超稠油油藏特征及其成因探讨[J].岩性油气藏, 2011, 23(4):129-132. CAI Ye, FAN Zuochun. Characteristics and genesis of super heavy oil reservoir with top water and edge water in Liaohe Oilfield[J]. Lithologic Reservoirs, 2011, 23(4):129-132.
[5] 张吉磊,罗宪波,张运来,等.提高稠油底水油藏转注井注水效率研究[J].岩性油气藏, 2019, 31(4):141-148. ZHANG Jilei, LUO Xianbo, ZHANG Yunlai, et al. Improving water injection efficiency of transfer injection well in heavy oil bottom water reservoir[J]. Lithologic Reservoirs, 2019, 31(4):141-148.
[6] 谢文彦,李晓光,陈振岩,等.河油区稠油及高凝油勘探开发技术综述[J].石油学报, 2007, 28(4):145-150. XIE Wenyan, LI Xiaoguang, CHEN Zhenyan, et al. Review of exploration and development technologies for heavy oil and high pour-point oil in Liaohe oil region[J]. Acta Petrolei Sinica, 2007, 28(4):145-150.
[7] 邹才能,王兆云,徐冠军,等.松辽盆地西斜坡稠油特征及成因[J].沉积学报, 2004, 22(4):700-706. ZOU Caineng, WANG Zhaoyun, XU Guanjun, et al. Characteristics and genesis of the western slope thick oils in Songliao Basin[J]. Acta Sedimentologica Sinica, 2004, 22(4):700-706.
[8] 胡守志,张冬梅,唐静,等.稠油成因研究综述[J].地质科技情报, 2009, 28(2):94-97. HU Shouzhi, ZHANG Dongmei, TANG Jing, et al. Review of the genesis of heavy oil[J]. Geological Science and Technology Information, 2009, 28(2):94-97.
[9] 童晓光,徐志强,史卜庆,等.苏丹迈卢特盆地石油地质特征及成藏模式[J].石油学报, 2006, 27(2):1-5. TONG Xiaoguang, XU Zhiqiang, SHI Buqing, et al. Petroleum geologic property and reservoir-forming pattern of Melut Basin in Sudan[J]. Acta Petrolei Sinica, 2006, 27(2):1-5.
[10] 窦立荣.苏丹迈努特盆地油气成藏机理和成藏模式[J].矿物岩石地球化学通报, 2005, 24(1):50-57. DOU Lirong. Formation mechanism and model of oil and gas accumulations in the Melut Basin, Sudan[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 2005, 24(1):50-57.
[11] 史忠生,王天奇,薛罗,等.中非Melut盆地高砂地比地层成藏特征与富集规律[J].天然气地球科学, 2017, 28(2):262-271. SHI Zhongsheng, WANG Tianqi, XUE Luo, et al. Reservoir characteristics and enrichment rule of highlysandy formation in Melut Basin, Central Africa[J]. Natural Gas Geoscience, 2017, 28(2):262-271.
[12] 史忠生,薛罗,牛慧赟,等.中非Melut盆地远源岩性油藏成藏条件与勘探对策[J].中国石油勘探, 2017, 22(6):87-95. SHI Zhongsheng, XUE Luo, NIU Huiyun, et al. Accumulation conditions of far-source lithologic reservoirs and exploration strategy in Melut Basin, Central Africa[J]. China Petroleum Exploration, 2017, 22(6):87-95.
[13] 王国林,史忠生,赵艳军,等.南苏丹Melut盆地北部地区岩性油藏成藏条件及勘探启示[J].岩性油气藏, 2018, 30(4):37-45. WANG Guolin, SHI Zhongsheng, ZHAO Yanjun, et al. Lithologic reservoir forming conditions and its exploration implication in northern Melut Basin, South Sudan[J]. Lithologic Reservoirs, 2018, 30(4):37-45.
[14] CHULL T J. Rift basins of interior Sudan:Petroleum exploration and discovery[J].AAPG Bulletin, 1988, 72(10):1128-1142.
[15] MCHARGUE T R, HEIDRICK T L, LIVINGSTON J K. Tectonostratigraphic development of the interior Sudan rifts, Central Africa[J]. Tectonophysics, 1992, 213(1/2):187-202.
[16] 叶先灯.苏丹Melut盆地构造、沉积和油气成藏研究[D].广州:中国科学院研究生院(广州地球化学研究所), 2006. YE Xiandeng. Study on tectonics, sedimentology and reserveoirs in Melut Basin, Sudan[D]. Guangzhou:University of Chinese Academy of Sciences (Guangzhou Institute of Geochemistry, Chinese Academy of Sciences), 2006.
[17] 苏传国.吐哈盆地鲁克沁构造带稠油降解特征及稠变机制[J].特种油气藏, 2004, 11(2):3-5. SU Chuanguo. Heavy oil degradation and densification in Lukeqin structure belt of Tuha Basin[J]. Special Oil and Gas Reservoirs, 2004, 11(2):3-5.
[18] 张枝焕,刘红军,李伟,等.准噶尔盆地车排子地区稠油成因及成藏过程[J].地球科学与环境学报, 2014, 36(2):18-32. ZHANG Zhihuan, LIU Hongjun, LI Wei, et al. Origin and accumulation process of heavy oil in Chepaizi area of Jungeer Basin[J].Journal of Earth Sciences and Environment, 2014, 36(2):18-32.
[19] 冯子辉,廖广志,方伟,等.松辽盆地北部西斜坡区稠油成因与油源关系[J].石油勘探与开发, 2003, 30(4):25-28. FENG Zihui, LIAO Guangzhi, FANG Wei, et al. Formation of heavy oil and correlation of oil-source in the western slope of the northern Songliao Basin[J]. Petroleum Exploration and Development, 2003, 30(4):25-28.
[20] 陈彬滔,史忠生,薛罗,等.古潜山周缘滩坝沉积模式与岩性油藏勘探实践:以南苏丹Melut盆地Ruman地区Galhak组为例[J].岩性油气藏, 2018, 30(6):37-44. CHEN Bintao, SHI Zhongsheng, XUE Luo, et al. Depositional models and lithologic reservoir exploration of sandy beach-bar around buried-hill:A case from Galhak Formation in Ruman region of Melut Basin, South Sudan[J]. Lithologic Reservoirs, 2018, 30(6):37-44.
[21] 史忠生,方乐华,薛罗,等.中非Melut盆地与我国东部裂谷盆地的类比及意义[J].地球科学, 2019, 44(2):588-602. SHI Zhongsheng, FANG Lehua, XUE Luo, et al. Analogy between Melut Basin of Central Africa and rifted basins of East China and implication[J]. Earth Science, 2019, 44(2):588-602.
[22] 陈云林.论富油洼陷及其意义[J].勘探家, 1999, 4(2):8-11. CHEN Yunlin. Concept of oil-rich subsag and its significance[J]. Petroleum Explorationist, 1999, 4(2):8-11.
[23] 陈彬滔,于兴河,王磊,等.河流相沉积的河型转换特征与控制因素及其油气地质意义:以南苏丹Melut盆地Ruman地区坳陷期Jimidi组为例[J].沉积学报, 2021, 39(2):424-433. CHEN Bintao, YU Xinghe, WANG Lei, et al. Features and controlling factors of river pattern transition in fluvial deposition and its significance for petroleum geology:An insight from the Jimidi Formation in the Ruman area, Melut Basin, South Sudan[J]. Acta Sedimentologica Sinica, 2021, 39(2):424-433.
[24] 史忠生,庞文珠,陈彬滔,等.南苏丹Melut盆地下组合近源白垩系成藏模式与勘探潜力[J].岩性油气藏, 2020, 32(5):23-33. SHI Zhongsheng, PANG Wenzhu, CHEN Bintao, et al. Hydrocarbon accumulation models and exploration potential of nearsource Cretaceous in the lower assemblage of Melut Basin, South Sudan[J]. Lithologic Reservoirs, 2020, 32(5):23-33.
[25] 潘树新,卫平生,袁剑英,等.论油气运移的"高速公路"及源外找油思想[J].沉积学报, 2011, 29(3):599-604. PAN Shuxin, WEI Pingsheng, YUAN Jianying, et al. Expressway of hydrocarbon migration and the thought to find the reservoirs beyond the region of source rock[J]. Acta Sedimentologica Sinica, 2011, 29(3):599-604.
[26] 薛罗,马轮,史忠生,等.南苏丹Melut盆地Ruman潜山构造演化及其对油气成藏的控制作用[J].油气地质与采收率, 2022, 29(2):53-60. XUE Luo, MA Lun, SHI Zhongsheng, et al. Tectonic evolution and its influence on hydrocarbon accumulation of Ruman buried hill in Melut Basin, South Sudan[J]. Petroleum Geology and Recovery Efficiency, 2022, 29(2):53-60.
[27] 薛罗,史忠生,马轮,等.南苏丹Melut盆地Ruman凹陷东斜坡稠油成藏机理及勘探潜力分析[J],特种油气藏, 2021, 28(1):67-73. XUE Luo, SHI Zhongsheng, MA Lun, et al. Analysis of heavy oil accumulation mechanism and exploration potential in the eastern slope of Ruman Sag in Melut Basin, South Sudan[J]. Special Oil and Gas Reservoirs, 2021, 28(1):67-73.
[28] 薛罗,史忠生,马轮,等.南苏丹Melut盆地北部坳陷烃源岩热演化特征及油气地质意义[J].中国石油勘探, 2020, 25(6):79-86. XUE Luo, SHI Zhongsheng, MA Lun, et al. Thermal evolution characteristics of source rocks and their petroleum geological significance in the Northern depression of Melut Basin, South Sudan[J]. China Petroleum Exploration, 2020, 25(6):79-86.
[29] 张林晔,陈致林,张春荣,等.济阳坳陷低熟油形成机理研究[J].勘探家, 2000, 5(3):36-40. ZHANG Linye, CHEN Zhilin, ZHANG Chunrong, et al. Genesis mechanism of immuature oil in Jiyang Depression[J]. Petroleum Explorationist, 2000, 5(3):36-40.
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