Development Characteristics and Main Controlling Factors of Oil and Gas Reservoirs in Ultra Deep Mesozoic Volcanic Reservoirs in Bohai Sea: Taking Bozhong A Structure as an Example
-
摘要: 渤海海域广泛发育中生界火山岩,但如何寻找规模型火山岩油气藏,一直以来是渤海深层潜山油气勘探的热点和难点.为了明确规模成藏的主控因素,以渤海海域新近获得重大勘探突破的渤中A构造中生界火山岩为研究靶区,利用钻测井资料、壁心及薄片观察、岩石地球化学等分析测试资料,结合三维地震,分析了中生界火山岩岩性岩相、火山机构类型、储集空间特征及油气成藏主控因素.研究表明,渤中A构造自下而上发育基性、中性和酸性3个火山岩旋回,其中晚期旋回由多个大中型酸性熔岩火山机构叠置构成,主要发育溢流相气孔流纹岩和块状流纹岩以及火山通道相的流纹质隐爆角砾岩等3大类岩性,具备发育优质火山岩储层的岩性岩相基础;火山岩原生孔隙占比较低,强构造活动和多类流体溶蚀等后期次生改造作用控制发育大量构造裂缝及溶蚀孔缝,储层垂向分为表层风化溶蚀带和内幕裂缝溶蚀带双层储层结构,整体为高孔渗的规模性优质缝溶体;高孔渗酸性火山岩缝溶体、古隆起背斜圈闭、紧邻渤中富烃洼陷、上覆厚层超压泥岩与晚期弱构造活动等有利要素是渤中A构造规模性油气成藏的关键条件.在以上研究的基础上,综合建立了研究区超深层规模型中生界火山岩油气成藏模式,可为渤海海域及其他相似地区火山岩油气勘探提供指导.Abstract: Mesozoic volcanic rocks are widely developed in the Bohai Bay basin. However, the exploration of large-scale volcanic hydrocarbon reservoirs has remained a persistent challenge in deep buried-hill plays in the Bohai area. To investigate the primary controls on substantial hydrocarbon accumulation, this study focuses on the Bohai A Mesozoic volcanic rocks, which have recently achieved significant exploration breakthroughs in the Bohai Sea area, as the research target area. drilling and logging data, sidewall core and thin-section observations, petrochemical analyses combined with 3D seismic, it characterizes the lithology-facies associations, volcanic edifice types, reservoir space characteristics, and key factors governing hydrocarbon accumulation. Research has shown that the BZ-A structure develops three volcanic rock cycles from base to top: basic, intermediate, and acidic. The late stage acidic volcanic rock cycle is composed of multiple large and medium-sized acidic lava volcanic structures stacked together, and is a thick and stable distribution of rhyolite. It mainly develops three types of rock types: effusive facies including vesicular and massive rhyolites, and volcanic conduit facies represented by rhyolitic cryptoexplosive breccia, which have the lithological and lithological basis for developing high-quality volcanic rock reservoirs. Although primary porosity is limited, extensive secondary modification-driven by intense tectonic activity and multi-phase fluid dissolution—has developed abundant structural fractures and dissolution pores/fissures.. The reservoir is vertically divided into a surface weathering dissolution zone and an inner crack dissolution zone with a double-layer reservoir structure, and the overall structure is a large-scale high-quality fracture solution with high porosity and permeability. The favorable factors for oil and gas accumulation in BZ-A include high porosity and permeability acidic volcanic rock fracture solution bodies, ancient uplifted anticline traps, proximity to the Bozhong hydrocarbon rich depression, overlying thick layer overpressure mudstone, and late stage weak tectonic activity. Based on these findings, a comprehensive hydrocarbon accumulation model for ultra deep, large-scale Mesozoic volcanic reservoirs is established, which offers valuable insights for volcanic hydrocarbon exploration in the Bohai Bay basin and analogous settings worldwide.
-
图 4 渤中A构造火山岩岩性特征
a.BZA-2井,5 076.10 m,气孔流纹岩,壁心白光照片;b.BZA-2井,5 088.50 m,块状流纹岩,壁心白光照片;c. BZA-1井,4 982.90 m,隐爆角砾岩,壁心白光照片;d. BZA-1井,5 215.7m,断层角砾岩,壁心白光照片;e.BZA-1井,4 936.50 m,流纹质凝灰岩,壁心白光照片;f. BZA-1井,5 005.7m,火山角砾岩,壁心白光照片;g.BZA-2井,4 855.2 m,流纹岩,薄片照片,正交,斑状结构;h.BZA-1井,4 941.0 m,流纹岩,薄片照片,正交,球粒结构;i. BZA-1井,4 982.90 m,流纹岩,薄片照片,正交,流动结构;j.BZA-1井,5 088.50 m,流纹岩,壁心白光照片;k. BZA-1井,4 855.2m,块状流纹岩,薄片照片,正交,霏细结构;l. BZA-2井,4 936.50 m,流纹岩,薄片照片,正交,斑状结构
Fig. 4. Lithological characteristics of volcanic rocks in Bozhong A structure
图 8 渤中A构造火山岩储层储集空间类型及特征
a.原生气孔,BZA-1井,4 941 m气孔流纹岩铸体薄片照片,单偏光;b. 残余气孔,BZA-2,4 962 m气孔流纹岩铸体薄片照片,单偏光;c.粒间孔,BZA-1井,4 938.5 m块状流纹岩铸体薄片照片,单偏光;d.角砾间残余孔,BZA-1井,5 005.7 m块状流纹岩铸体薄片照片,单偏光;e. 隐爆缝,BZA-1井,5 010.20 m隐爆角砾岩壁心白光照片;f.溶蚀缝,BZA-1井,4 936.5 m块状流纹岩铸体薄片照片,单偏光;g.杏仁体溶孔,BZA-2井,4 884.40 m隐爆角砾岩铸体薄片照片,单偏光;h.长石溶孔,BZA-2井,4 866.3 m,隐爆角砾岩铸体薄片照片,单偏光;i.基质间的隐晶质溶蚀微孔,BZA-1井,4 955.00 m块状流纹岩铸体薄片照片,单偏光;j.隐爆岩汁溶蚀孔,BZA-1井,5 001.1 m隐爆角砾岩铸体薄片照片,单偏光;k.脱玻化孔,BZA-1井,4 955 m块状流纹岩铸体薄片照片,单偏光;l.铸模孔,BZA-2井,4 815.20 m断层角砾岩铸体薄片照片,单偏光;m.石英斑晶溶蚀港湾状,BZA-2,5 081.9 m块状流纹岩铸体薄片照片,单偏光;n.溶蚀缝,BZA-1井,4 960.0 m块状流纹岩铸体薄片照片,单偏光;o.溶蚀构造缝,BZA-2井,5 103.0 m块状流纹岩壁心白光照片
Fig. 8. Reservoir space types and characteristics of volcanic reservoir in Bozhong A structure
图 13 渤中A中生界火山岩建造构造演化过程(剖面位置见图 1)
Fig. 13. Tectonic evolution process of volcanic rocks in Bozhong A structure
图 15 渤中A构造储层烃类包裹体特征、伴生盐水包裹体均一温度直方图和油气充注时间
a,b. BZA-1井,4 993.7 m,中生界,烃类包裹体,透射光下呈灰褐色,紫外光下呈蓝白色,呈团块状捕获于石英脉体中,其中a为单偏光,b为荧光;c.BZA构造储层烃类包裹体伴生的盐水包裹体均一温度直方图;d. BZA-1井埋藏史、热史及油气充注时间
Fig. 15. Characteristics and homogenization temperature of fluid inclusions and the charging time of the Bozhong A buried hill oilfield reservoir
表 1 环渤中凹陷火山岩钻探概况
Table 1. Overview of volcanic rock drilling in Bozhong sag
构造带 井 岩性组合 物性 含油性 渤中凹陷西部 BZA⁃2井 流纹岩425 m 平均孔隙度9.2%
平均渗透率0.3 mD气层253.4 m
油层119.7 m渤中凹陷东斜坡 c井 流纹岩226 m
粗安岩151 m
凝灰岩91 m
角砾岩:52 m平均孔隙度9.5%
平均渗透率0.4 mD气层66 m
油层10 m
水层51 m渤中凹陷北部 d井 流纹岩118 m 平均孔隙度10.9%
平均渗透率10.2 mD油层86 m 渤中凹陷北部 e井 粗安岩161 m
角砾岩82 m
凝灰岩173 m
玄武岩110 m平均孔隙度18.7%
平均渗透率70.9 mD油层52 m 渤中凹陷南斜坡 f井 流纹岩403 m
凝灰岩6 m平均孔隙度4.8%
平均渗透率0.1 mD气层39.8 m
水层135.1 m -
Bai, G. S., Jiang, Y. L., Hou, S., et al., 2022. Main Controlling Factors and Genetic Mechanism of High-Quality Volcanic Reservoirs in Huoshiling Formation of Longfengshan Area. Earth Science, 47(5): 1748-1761(in Chinese with English abstract). doi: 10.3799/dqkx.2021.160 Bajwah, Z. U., Seccombe, P. K., Offler, R., 1987. Trace Element Distribution, Co: Ni Ratios and Genesis of the Big Cadia Iron-Copper Deposit, New South Wales, Australia. Mineralium Deposita, 22(4): 292-300. https://doi.org/10.1007/bf00204522 Chen, Y. T., Zheng, H., Ventura, G., et al., 2024. Volcanic Lithofacies Control the Space in Unconventional, Rhyolitic Hydrocarbon Reservoirs: The Hailar Basin, NE China. Marine and Petroleum Geology, 165: 106872. https://doi.org/10.1016/j.marpetgeo.2024.106872 Dai, J. X., Gui, M. Y., Huang, Z. L., et al., 1986. Carbon Dioxide Seepages and Their Origin in Mid-East Chuxiong Basin. Geochimica, 15(1): 42-49(in Chinese with English abstract). Deng, Y. H., 2015. Formation Mechanism and Exploration Practice of Large-Medium Buried-Hill Oil Fields in Bohai Sea. Acta Petrolei Sinica, 36(3): 253-261(in Chinese with English abstract). Feng, Z. H., Yin, C. H., Qi, J. S., et al., 2010. Main Factors Controlling Hydrocarbon Accumulation in Large Volcanic Gas Fields: A Case Study of the Qingshen Gas Field in the Songliao Basin. Acta Petrologica Sinica, 26(1): 21-32 (in Chinese with English abstract). Fu, M., 2022. Origin, Distribution and Tectonic Processes of Late Mesozoic Buried Volcanoes in the Bozhong Sag and Surrounding Areas, Bohai Bay Basin (Dissertation). Jilin University, Changchun(in Chinese with English abstract). Fu, M., Shan, X. L., Zhang, X. T., et al., 2022. Geodynamic Evolution of Lithospheric Removal of the North China Craton: Constraints from Late Mesozoic Volcanic Rocks in the Bohai Bay Basin, East China. Journal of Asian Earth Sciences, 236: 105330. https://doi.org/10.1016/j.jseaes.2022.105330 Gao, Y. F., Wu, Y. H., Liu, W. Z., et al., 2013. Intercrystalline Micropore Characteristics and Reservoir Effect of Yingcheng Formation Volcanic Rock in Yingtai Fault Depression, Southern Songliao Basin. Acta Petrolei Sinica, 34(4): 667-674(in Chinese with English abstract). He, H., Li, S. M., Kong, C. X., 2020. Volcanic Reservoirs Evaluation and Cost-Effective Development. Petroleum Industry Press, Beijing(in Chinese). Hu, J. S., Tang, H. F., Yu, X. Y., et al., 2024. Characteristics of Volcano Stratigraphic Elements in Faulted Depression Basin and Its Geologic Significance: A Case Analysis of Full Coring Well of Lower Cretaceous Yingcheng Formation in Jiutai, Jilin Province. Earth Science, 49(1): 155-173(in Chinese with English abstract). doi: 10.3799/dqkx.2022.123 Huang, Y. L., Wang, P. J., Feng, Z. Q., et al., 2007. Analogy of Volcanic Edifices between Modern Volcanoes and Ancient Remnant Volcanoes in Songliao Basin. Journal of Jilin University (Earth Science Edition), 37(1): 65-72(in Chinese with English abstract). Kuang, L. C., Lü, H. T., Wang, X. L., et al., 2010. Exploration of Volcanic Gas Reservoirs and Discovery of the Kelameili Gas Field in the Junggar Basin. Natural Gas Industry, 30(2): 1-6(in Chinese with English abstract). Li, H. Y., Xiao, S. G., Li, F., et al., 2023. Reservoir Characteristics and Main Controlling Factors of Hydrocarbon Accumulation of Lower Paleozoic Buried-Hill in Northwestern Shaleitian Slope of Western Bohai Sea. Earth Science, 48(1): 329-341(in Chinese with English abstract). doi: 10.3799/dqkx.2022.406 Li, R. L., Yang, L. Y., Zhu, J. F., et al., 2023. Volcanic Reservoir Characteristics and Hydrocarbon Accumulation Control Factors of Rift Depressions in Southern Songliao Basin. Earth Science Frontiers, 30(4): 100-111(in Chinese with English abstract). Liu, J. Q., Meng, F. C., Cui, Y., et al., 2010. Discussion on the Formation Mechanism of Volcanic Oil and Gas Reservoirs. Acta Petrologica Sinica, 26(1): 1-13(in Chinese with English abstract). Niu, C. M., Yu, H. B., Shan, X. L., et al., 2024. Favorable Reservoir Genesis of Mesozoic Volcanic Rocks in Jinzhou 25-A Structure Area, Bohai Sea. Journal of Jilin University (Earth Science Edition), 54(6): 1788-1800(in Chinese with English abstract). Qi, J. F., Yu, F. S., Lu, K. Z., et al., 2003. Conspectus on Mesozoic Basins in Bohai Bay Province. Earth Science Frontiers, 10(Suppl. 1): 199-206(in Chinese with English abstract). Shan, X. L., Wang, W., Zhang, X. T., et al., 2023. Geological Model and Construction Process of the Mesozoic Volcanic Edifices in Bozhong Sag, Bohai Sea. Oil & Gas Geology, 44(3): 675-688(in Chinese with English abstract). Sun, Y. H., Shen, P. P., Ruan, B. T., et al., 2008. Lithologic and Storage-Permeation Characteristics of Changshen 1 Volcanic Gas Reservoirs in Jilin. Natural Gas Geoscience, 19(5): 630-633(in Chinese with English abstract). Tang, H. F., Wang, P. J., Li, R. L., et al., 2012. Classification of Volcanic Edifices and Its Characteristics of Gas Pool in Faulted Sequence of the Songliao Basin, NE China. Journal of Jilin University (Earth Science Edition), 42(3): 583-589(in Chinese with English abstract). Wang, P. J., Chi, Y. L., Liu, W. Z., et al., 2003. Volcanic Facies of the Songliao Basin: Classification, Characteristics and Reservoir Significance. Journal of Changchun University of Science and Technology, 33(4): 449-456(in Chinese with English abstract). Wu, Z. P., Hou, X. B., Li, W., 2007. Discussion on Mesozoic Basin Patterns and Evolution in the Eastern North China Block. Geotectonica et Metallogenia, 31(4): 385-399(in Chinese with English abstract). Xu, C. G., Yang, H. F., Wang, Q. B., et al., 2025. Progress in Exploration of Volcanic Oil and Gas Reservoirs. Earth Science, 50(2): 363-376(in Chinese with English abstract). doi: 10.3799/dqkx.2025.011 Xu, C. G., Yu, H. B., Wang, J., et al., 2019. Formation Conditions and Accumulation Characteristics of Bozhong 19-6 Large Condensate Gas Field in Offshore Bohai Bay Basin. Petroleum Exploration and Development, 46(1): 25-38(in Chinese with English abstract). Xu, C. G., Zhang, G. C., Huang, S. B., et al., 2024. Formation of Large- and Medium-Sized Cretaceous Volcanic Reservoirs in the Offshore Bohai Bay Basin, East China. Petroleum Exploration and Development, 51(3): 467-477(in Chinese with English abstract). Xu, Z. S., Wang, Y. M., Pang, Y. M., et al., 2008. Development of Volcanic Rock Reservoirs in the Xushen Gas Field in Daqing. Natural Gas Industry, 28(12): 74-77 (in Chinese with English abstract). Yang, K. K., 2019. Diagenesis of Carboniferous Batamayineishan Formation Volcanic Reservoir in Eastern Junggar Basin (Dissertation). Jilin University, Changchun(in Chinese with English abstract). Yang, H. F., Lü, D. Y., Sun, Y. H., et al., 2021. The Fault System and Its Tectonophysics Simulation in the Eastern Huanghekou Sag in Bohai Bay Basin. Earth Science, 46(7): 2391-2402(in Chinese with English abstract). doi: 10.3799/dqkx.2020.189 Ye, T., Wei, A. J., Peng, J. S., et al., 2018. Characteristics and Reservoir-Forming Differences of Volcanic Lithofacies in Yixian Formation of Cretaceous in Bohai Bay Area. Journal of China University of Mining & Technology, 47(5): 1081-1091(in Chinese with English abstract). Yue, Q. Y., Shan, X. L., Zhang, X. T., et al., 2021. Quantitative Characterization, Classification, and Influencing Factors of the Full Range of Pores in Weathering Crust Volcanic Reservoirs: Case Study in Bohai Bay Basin, China. Natural Resources Research, 30(2): 1347-1365. https://doi.org/10.1007/s11053-020-09774-5 Zhou, J. X., Xu, C. Q., Huang, Z., et al., 2025. Enhanced Formation Conditions of the Large-Scale Volcanic Reservoir in the BZ8-3S Large Volcanic Structure in Bozhong Sag, Bohai Bay Basin. Earth Science, 50(2): 388-404(in Chinese with English abstract). doi: 10.3799/dqkx.2024.026 Zhou, J. X., Yang, H. F., Guan, D. Y., et al., 2023. Discovery of BZ26-6 Metamorphic Rock Buried Hill Oilfield in Bohai Bay Basin and Understanding Innovation. China Offshore Oil and Gas, 35(4): 1-11(in Chinese with English abstract). Zhou, X. H., Yu, Y. X., Tang, L. J., et al., 2010. Cenozoic Offshore Basin Architecture and Division of Structural Elements in Bohai Sea. China Offshore Oil and Gas, 22(5): 285-289(in Chinese with English abstract). Zhu, H. L., Qu, X. Y., Liu, L., et al., 2011. Study on Interaction between the Feldspar and CO2 Fluid. Journal of Jilin University (Earth Science Edition), 41(3): 697-706(in Chinese with English abstract). 白国帅, 蒋有录, 侯帅, 等, 2022. 龙凤山地区火石岭组火山岩优质储层主控因素及成因机制. 地球科学, 47(5): 1748-1761. doi: 10.3799/dqkx.2021.160 戴金星, 桂明义, 黄自林, 等, l986. 楚雄盆地中东部禄丰-楚雄一带的二氧化碳气及其成因. 地球化学, 15(1): 42-49. 邓运华, 2015. 渤海大中型潜山油气田形成机理与勘探实践. 石油学报, 36(3): 253-261. 冯子辉, 印长海, 齐景顺, 等, 2010. 大型火山岩气田成藏控制因素研究: 以松辽盆地庆深气田为例. 岩石学报, 26(1): 21-32. 傅锚, 2022. 渤海湾盆地环渤中凹陷地区晚中生代埋藏火山的成因与分布及其构造过程(博士学位论文). 长春: 吉林大学. 高有峰, 吴艳辉, 刘万洙, 等, 2013. 松辽盆地南部英台断陷营城组火山岩晶间微孔特征及储层效应. 石油学报, 34(4): 667-674. 何辉, 李顺明, 孔垂显, 等, 2020. 火山岩油藏储层评价与高效开发. 北京: 石油工业出版社. 户景松, 唐华风, 余雪英, 等, 2024. 断陷盆地火山地层构成要素特征及地质意义: 以吉林省九台全取心井下白垩统营城组为例. 地球科学, 49(1): 155-173. doi: 10.3799/dqkx.2022.123 黄玉龙, 王璞珺, 冯志强, 等, 2007. 松辽盆地改造残留的古火山机构与现代火山机构的类比分析. 吉林大学学报(地球科学版), 37(1): 65-72. 匡立春, 吕焕通, 王绪龙, 等, 2010. 准噶尔盆地天然气勘探实践与克拉美丽气田的发现. 天然气工业, 30(2): 1-6. 李慧勇, 肖述光, 李飞, 等, 2023. 渤海西部沙西北斜坡带下古生界潜山储层特征及成藏主控因素. 地球科学, 48(1): 329-341. doi: 10.3799/dqkx.2022.406 李瑞磊, 杨立英, 朱建峰, 等, 2023. 松辽盆地南部断陷层火山岩储层特征及油气成藏主控因素. 地学前缘, 30(4): 100-111. 刘嘉麒, 孟凡超, 崔岩, 等, 2010. 试论火山岩油气藏成藏机理. 岩石学报, 26(1): 1-13. 牛成民, 于海波, 单玄龙, 等, 2024. 渤海海域锦州25-A构造区中生界火山岩有利储层成因. 吉林大学学报(地球科学版), 54(6): 1788-1800. 漆家福, 于福生, 陆克政, 等, 2003. 渤海湾地区的中生代盆地构造概论. 地学前缘, 10(增刊1): 199-206. 单玄龙, 王蔚, 张新涛, 等, 2023. 渤海海域渤中凹陷中生界火山机构地质模式及建造过程. 石油与天然气地质, 44(3): 675-688. 孙圆辉, 沈平平, 阮宝涛, 等, 2008. 松辽盆地长岭断陷长深1号气田火山岩岩性及储渗特征研究. 天然气地球科学, 19(5): 630-633. 唐华风, 王璞珺, 李瑞磊, 等, 2012. 松辽盆地断陷层火山机构类型及其气藏特征. 吉林大学学报(地球科学版), 42(3): 583-589. 王璞珺, 迟元林, 刘万洙, 等, 2003. 松辽盆地火山岩相: 类型、特征和储层意义. 吉林大学学报(地球科学版), 33(4): 449-456. 吴智平, 侯旭波, 李伟, 2007. 华北东部地区中生代盆地格局及演化过程探讨. 大地构造与成矿学, 31(4): 385-399. 徐长贵, 杨海风, 王清斌, 等, 2025. 火山岩油气藏勘探进展. 地球科学, 50(2): 363-376. doi: 10.3799/dqkx.2025.011 徐长贵, 于海波, 王军, 等, 2019. 渤海海域渤中19-6大型凝析气田形成条件与成藏特征. 石油勘探与开发, 46(1): 25-38. 徐长贵, 张功成, 黄胜兵, 等, 2024. 渤海湾盆地海域白垩系大中型火山岩油气藏形成条件. 石油勘探与开发, 51(3): 467-477. 徐正顺, 王渝明, 庞彦明, 等, 2008. 大庆徐深气田火山岩气藏的开发. 天然气工业, 28(12): 74-77, 143. 杨海风, 吕丁友, 孙永河, 等, 2021. 渤海湾盆地黄河口凹陷东洼断裂体系发育特征及其变形过程的构造物理模拟. 地球科学, 46(7): 2391-2402. doi: 10.3799/dqkx.2020.189 杨凯凯, 2019. 准噶尔盆地东部石炭系巴塔玛依内山组火山岩储层成岩作用研究(硕士学位论文). 长春: 吉林大学. 叶涛, 韦阿娟, 彭靖淞, 等, 2018. 渤海海域白垩系义县组火山岩岩相特征及成储差异. 中国矿业大学学报, 47(5): 1081-1091. 周家雄, 徐春强, 黄志, 等, 2025. 渤海湾盆地渤中凹陷BZ8-3S大型构造规模型火山岩储层形成条件. 地球科学, 50(2): 388-404. doi: 10.3799/dqkx.2024.026 周家雄, 杨海风, 官大勇, 等, 2023. 渤海湾盆地渤中26-6变质岩潜山大油田发现与认识创新. 中国海上油气, 35(4): 1-11. 周心怀, 余一欣, 汤良杰, 等, 2010. 渤海海域新生代盆地结构与构造单元划分. 中国海上油气, 22(5): 285-289. 朱焕来, 曲希玉, 刘立, 等, 2011. CO2流体-长石相互作用实验研究. 吉林大学学报(地球科学版), 41(3): 697-706. -




下载: