鄂尔多斯盆地富县—甘泉地区三叠系延长组7油层组致密油富集主控因素

doi:10.11743/ogg20180609

摘要/Abstract

摘要： 根据野外露头、岩心、测井、录井与分析化验等资料，结合试油、试采等动态数据，多角度深入探讨了鄂尔多斯盆地富县-甘泉地区三叠系延长组第7油层组（简称长7油层组）致密油富集成藏的主控因素。结果显示，广泛发育的长7油层组优质烃源岩厚度大，有机质丰富，类型优越，成熟度适宜，为致密油提供了丰富的油源，控制了长7油层组致密油含油边界。长7¹与长7²亚油组与下部烃源岩构成下源上储、源储紧邻的成藏组合。储层优质成岩相控制着致密油富集的区带。致密储层内存在多期原油充注，早期原油充注使储层岩石颗粒润湿性由亲水变为混合润湿，形成原油运移聚集的优势通道，控制了主力成藏期原油运聚的路径和范围，一定程度上限制了长7致密油成藏范围。不同尺度隔夹层将储层分隔为“网状”结构，结构非均质性强，导致了砂岩中差异化的流体流动以及复杂的油水关系。同时，致密层遮挡也对致密油富集成藏起到了一定控制作用。上述因素共同造成了致密油成藏范围局限，油藏内油水关系复杂，油井与水井共存。

关键词: 成岩相, 非均质性, 多期充注, 致密油, 延长组, 三叠系, 鄂尔多斯盆地

Abstract: The major factors controlling the enrichment of tight oil in the 7th oil layer group of the Triassic Yanchang Formation(Chang 7 oil layer group)in Fuxian-Ganquan area,Ordos Basin,were investigated from multiple perspectives of outcrop,core,logging and laboratory testing,combined with such dynamic data as production tests.The results show that the high-quality source rocks of Chang 7 oil layer group are developed well and widely and are characterized by large thickness,high organic richness,favorable type of kerogen and moderate maturity,thus provide an abundant oil source for tight oil enrichment and control the oil-water contact of the Chang 7 tight oil reservoirs.The Chang 7¹ and Chang 7² sub-layer groups in the Chang 7 oil layer group together with the underlying source rocks make up a source-reservoir assemblage characteristic of closeness between the underlying source rock and overlying reservoir.The analysis of diagenetic facies shows that quality diagenetic facies of reservoir controls the zones of tight oil enrichment.There is multi-phase oil charging in the tight oil reservoirs.During the early charging stages,the wettability of the reservoir rock was turned from water wet to mixed wettability with oil charging,leading to the formation of preferential channels for oil migration and accumulation,which determines the pathway and scope of oil migration and accumulation in the major pool-forming period,and to a certain extent constrains the distribution of the Chang 7 tight oil reservoirs.Baffles and barriers of various sizes compartmentalize the reservoirs into a network structure with intense heterogeneity,leading to differential fluid flow and complex oil-water contact in the sandstone.Meanwhile,the shelter of tight layers can also play a role in controlling the accumulation of Chang 7 tight oil.All the factors mentioned above collectively determine the limited distribution of tight oil,the complexity of water-oil contact and the coexistence of oil wells and water wells.

Key words: diagenetic facies, heterogeneity, multi-phase charging, tight oil, Yanchang Formation, Triassic, Ordos Basin

中图分类号:

TE122.3

葛云锦,任来义,贺永红,等. 鄂尔多斯盆地富县—甘泉地区三叠系延长组7油层组致密油富集主控因素[J]. 石油与天然气地质, 2018, 39(6): 1190-1200. doi: 10.11743/ogg20180609 Ge Yunjin,Ren Laiyi,He Yonghong,et al. Main factors controlling the tight oil enrichment in the 7^th oil layer group of the Triassic Yanchang Formation in Fuxian-Ganquan area, Ordos Basin[J]. Oil & Gas Geology, 2018, 39(6): 1190-1200. doi: 10.11743/ogg20180609

参考文献

[1] Sonnenberg S A,Aris P.Petroleum geology of the giant Elm Coulee field,Williston Basin[J].AAPG Bulletin,2009,93(9):1127-1153.
[2] 贾承造,邹才能,李建忠,等.中国致密油评价标准、主要类型、基本特征及资源前景[J].石油学报,2012,33(3):343-350. Jia Chengzao,Zou Caineng,Li Jianzhong,et al.Assessment criteria,main types,basic features and resource prospects of the tight oil in China[J].Acta Petrolei Sinica,2012,33(3):343-350.
[3] 贾承造,郑民,张永峰.中国非常规油气资源与勘探开发前景[J].石油勘探与开发,2012,39(2):129-136. Jia Chengzao,Zheng Min,Zhang Yongfeng.Unconventional hydrocarbon resources in China and the prospect of exploration and development[J].Petroleum Exploration and Development,2012,39(2):129-136.
[4] 林森虎,邹才能,袁选俊,等.美国致密油开发现状及启示[J].岩性油气藏,2011,23(4):25-30. Lin Senhu,Zou Caineng,Yuan Xuanjun,et al.Status quo of tight oil exploitation in the United States and its implication[J].Lithologic Reservoirs,2011,23(4):25-30.
[5] 梁狄刚,冉隆辉,戴弹申,等.四川盆地中北部侏罗系大面积非常规石油勘探潜力的再认识[J].石油学报,2011,32(1):8-17. Liang Digang,Ran Longhui,Dai Danshen,et al.A re-recognition of the prospecting potential of Jurassic large-area and non-conventional oils in the central-northern Sichuan Basin[J].Acta Petrolei Sinica,2011,32(1):8-17.
[6] 黄薇,梁江平,赵波松,等.辽盆地北部白垩系泉头组扶余油层致密油成藏主控因素[J].古地理学报,2013,15(5):635-644. Huang Wei,Liang Jiangping,Zhao Bo,et al.Main controlling factors of tight oil accumulations in the Fuyu Layer of Cretaceous Quantou Formation in northern Songliao Basin[J].Journal of palaeogeography,2013,15(5):635-644.
[7] 蒲秀刚,周立宏,韩文中,等.细粒相沉积地质特征与致密油勘探——以渤海湾盆地沧东凹陷孔店组二段为例[J].石油勘探与开发,2016,43(1):1-10. Pu Xiugang,Zhou Lihong,Han Wenzhong,et al.Geological features of fine-grained facies sedimentation and tight oil exploration:A case from the second Member of Paleogene Kongdian Formation of Cangdong sag,Bohai Bay Basin[J].Petroleum Exploration and Development,2016,43(1):1-10.
[8] 匡立春,唐勇,雷德文,等.准噶尔盆地二叠系咸化湖相云质岩致密油形成条件与勘探潜力[J].石油勘探与开发,2012,39(6):657-667. Kuang Lichun,Tang Yong,Lei Dewen,et al.Formation conditions and exploration potential of tight oil in the Permian saline lacustrine dolomitic rock,Junggar Basin,NW China[J].Petroleum Exploration and Development,2012,39(6):657-667.
[9] 梁浩,李新宁,马强,等.三塘湖盆地条湖组致密油地质特征及勘探潜力[J].石油勘探与开发,2014,41(5):563-572. Liang Hao,Li Xinning,Ma Qiang,et al.Geological features and exploration potential of Permian Tiaohu Formation tight oil,Santanghu Basin,NW China[J].Petroleum Exploration and Development,2014,41(5):563-572.
[10] 杨华,李士祥,刘显阳.鄂尔多斯盆地致密油、页岩油特征及资源潜力[J].石油学报,2013,34(1):1-10. Yang Hua,Li Shixiang, Liu Xianyang.Characteristics and resource prospects of tight oil and shale oil in Ordos Basin[J].Acta Petrolei Sinica,2013,34(1):1-10.
[11] 白玉彬,赵靖舟,赵子龙,等.鄂尔多斯盆地志丹地区延长组长7致密油成藏条件与成藏特征[J].石油与天然气地质,2013,34(5):631-639. Bai Yubin,Zhao Jingzhou,Zhao Zilong,et al.Accumulation conditions and characteristics of the Chang 7 tight oil reservoir of the Yanchang Formation in Zhidan area,Ordos Basin[J].Oil & Gas Geology,2013,34(5):631-639.
[12] 任战利,李文厚,梁宇,等.鄂尔多斯盆地东南部延长组致密油成藏条件及主控因素[J].石油与天然气地质,2014,35(2):190-197. Ren Zhanli,Li Wenhou,Liang Yu,et al.Tight oil reservoir formation conditions and main controlling factors of Yanchang Formation in southeastern Ordos Basin[J].Oil & Gas Geology,2014,35(2):190-197.
[13] 姚泾利,邓秀芹,赵彦德,等.鄂尔多斯盆地延长组致密油特征[J].石油勘探与开发,2013,40(2):150-158. Yao Jingli,Deng Xiuqin,Zhao Yande,et al.Characteristics of tight oil in Triassic Yanchang Formation,Ordos Basin[J].Petroleum Exploration and Development,2013,40(2):150-158.
[14] 白玉彬,罗静兰,王少飞,等.鄂尔多斯盆地吴堡地区延长组长8致密砂岩油藏成藏主控因素[J].中国地质,2013,40(4):1159-1168. Bai Yubin, Luo Jinglan,Wang Shaofei,et al.The distribution of Chang-8 tight sandstone oil reservoir of Yanchang Formation in Wubao area,central-south of Ordos Basin[J].Geology in China,2013,40(4):1159-1168.
[15] 白玉彬,赵子龙,赵靖舟,等.鄂尔多斯盆地安塞地区长9 致密油成藏机理与主控因素[J].中南大学学报(自然科学版),2014,45(9):3127-3135. Bai Yubin,Zhao Zilong,Zhao Jingzhou,et al.Oil reservoir forming mechanisms and main controlling factors of tight oil of Chang-9 member in Ansai area,Ordos Basin[J].Journal of Central South University (Science and Technology),2014,45(9):3127-3135.
[16] 白玉彬,赵靖舟,赵子龙,等.鄂尔多斯盆地志丹地区延长组长7致密油成藏条件与成藏特征[J].石油与天然气地质,2013,34(5):631-639. Bai Yubin,Zhao Jingzhou,Zhao Zilong,et al.Accumulation conditions and characteristics of the Chang 7 tight oil reservoir of the Yanchang Formation in Zhidan area,Ordos Basin[J].Oil & Gas Geology,2013,34(5):631-639.
[17] 张凤奇,张凤博,钟红利,等.鄂尔多斯盆地甘泉南部地区延长组长7致密油富集主控因素[J].岩性油气藏,2016,28(3):12-19. Zhang Fengqi,Zhang Fengbo,Zhong Hongli,et al.Main controlling factors of the enrichment of Chang 7 tight oil of Yanchang Formation in southern Ganquan area,Ordos Basin[J].Lithologic Reservoirs,2016,28(3):12-19.
[18] 赵卫卫,杨云祥,宋和平,等.鄂尔多斯盆地下寺湾地区长7 致密油地质特征及成藏主控因素[J].中南大学学报(自然科学版),2014,45(12):4267-4276. Zhao Weiwei,Yang Yunxiang,Song Heping,et al.Geological characteristics and main controlling factors of hydrocarbon accumulation in Chang 7 tight oil of Yanchang Formation of Xiasiwan area,Ordos Basin[J].Journal of Central South University (Science and Technology),2014,45(12):4267-4276.
[19] 杨华,梁晓伟,牛小兵,等.陆相致密油形成地质条件及富集主控因素——以鄂尔多斯盆地三叠系延长组7段为例[J].石油勘探与开发,2017,44(1):12-20. Yang Hua,Liang Xiaowei,Niu Xiaobing,et al.Geological conditions for continental tight oil formation and the main controlling factors for the enrichment:A case of Chang 7 Member,Triassic Yanchang Formation,Ordos Basin,NW China[J].Petroleum Exploration and Development,2017,44(1):12-20.
[20] 杨智,侯连华,陶士振,等.致密油与页岩油形成条件与"甜点区"评价[J].石油勘探与开发,2015,42(5):555-565. Yang Zhi,Hou Lianhua,Tao Shizhen,et al.Formation conditions and "sweet spot" evaluation of tight oil and shale oil[J].Petroleum Exploration and Development,2015,42(5):555-565.
[21] 付金华,喻建,徐黎明,等.鄂尔多斯盆地致密油勘探开发新进展及规模富集可开发主控因素[J].中国石油勘探,2015,20(5):9-18. Fu Jinhua,Yu Jian,Xu Liming,et al.New progress in exploration and development of tight oil in Ordos Basin and main controlling factors of large-scale enrichment and exploitable capacity[J].China Petroleum Exploration,2015,20(5):9-18.
[22] 张忠义,陈世加,杨华,等.鄂尔多斯盆地三叠系长7段致密油成藏机理[J].石油勘探与开发,2016,43(4):590-599. Zhang Zhongyi,Chen Shijia,Yang Hua,et al.Tight oil accumulation mechanisms of Triassic Yanchang Formation Chang 7 Member,Ordos Basin,China[J].Petroleum Exploration and Development,2016,43(4):590-599.
[23] 白斌,朱如凯,吴松涛,等.利用多尺度CT成像表征致密砂岩微观孔喉结构[J].石油勘探与开发,2013,40(3):329-333. Bai Bin,Zhu Rukai,Wu Songtao,et al.Multi-scale method of Nano(Micro)-CT study on microscopic pore structure of tight sandstone of Yanchang Formation,Ordos Basin[J].Petroleum Exploration and Development,2013,40(3):329-4333.
[24] 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 Yanchang Formation,Ordos Basin,China[J].Petroleum Exploration and Development,2012,39(4):417-425.
[25] 姚泾利,赵彦德,邓秀芹,等.鄂尔多斯盆地延长组致密油成藏控制因素[J].吉林大学学报(地球科学版),2015,45(4):983-992. Yao Jingli,Zhao Yande,Deng Xiuqin,et,al.Controlling Factors of tight oilreservoir in Triassic Yanchang Formation in Ordos Basin[J].Journal of Jilin University:Earth Science Edition,2015,45(4):983-992.
[26] 邹才能,张国生,杨智,等.非常规油气概念、特征、潜力及技术:兼论非常规油气地质学[J].石油勘探与开发,2013,40(4):385-399. Zou Caineng,Zhang Guosheng,Yang Zhi,et al.Geologicalconcepts,characteristics,resource potential and key techniques of unconventional hydrocarbon:On unconventional petroleum geology[J].Petroleum Exploration and Development,2013,40(4):385-399.
[27] 邹才能,朱如凯,吴松涛,等.常规与非常规油气聚集类型、特征、机理及展望:以中国致密油和致密气为例[J].石油学报,2012,33(2):173-187. Zou Caineng,Zhu Rukai,Wu Songtao,et al.Types,characteristics,genesis and prospects of conventional and unconventional hydrocarbon accumulations:Taking tight oil and tight gas in China as an instance[J].Acta Petrolei Sinica,2012,33(2):173-187.
[28] 冯旭,刘洛夫,窦文超,等.鄂尔多斯盆地西南部长7和长6-3致密砂岩成岩作用与成岩相[J].成都理工大学学报(自然科学版),2016,43(4):476-486. Feng Xu,Liu Luofu,Dou Wenchao,et al.Digenesis and digenetic facies of the Chang7 and Chang 6-3 tight sandstone reservoirs in southwestern Ordos Basin,China[J].Journal of ChengDu of Technology(Science and Technology Edition).2016,43(4):476-486.
[29] 罗晓容,张立宽,雷裕红,等.储层结构非均质性及其在深层油气成藏中的意义[J].中国石油勘探,2016,21(1):28-36. Luo Xiaorong,Zhang Likuan,Lei Yuhong,et al.Structural heterogene-ity of reservoirs and its I mplication on hydrocarbon accumulation in deep zones[J].China Petroleum Exploration,2016,21(1):28-36.
[30] 罗晓容,王忠楠,雷裕红,等.特超低渗砂岩油藏储层非均质性特征与成藏模式-以鄂尔多斯盆地西部延长组下组合为例[J].石油学报,2016,37(增刊1):87-98. Luo Xiaorong,Wang Zhongnan,Lei Yuhong,et al.Heterogeneity characteristics and accumulation model of ultra-low permeability sandstone reservoirs:a case study of the lower part of Yanchang Formation in the western Ordos Basin,China[J].Acta Petrolei Sinica,2016,37(S1):87-98.
[30] Donselaar M E,Overreem I.Connectivity of fluvial point-bar deposits:an example from the Miocene Huesca fluvial fan,Ebro Basin,Spain[J].AAPG Bulletin,2008,92(9):1109-1129.