Multiple Décollement Model and Its Petroleum Geological Significance in Kelasu Subsalt Structural Belt, Kuqa Depression
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摘要: 为了精细刻画库车坳陷克拉苏构造盐下深层构造模型和空间变化规律, 通过对高质量连片三维地震资料的精细解释, 发现克拉苏构造带盐下深层存在多滑脱层变形, 侏罗系煤系地层是盐下的主要滑脱层, 克拉苏构造带东部发育三叠系下滑脱层, 而西部不发育.下滑脱层是否发育与基底形态控制的三叠系厚度和岩性有关.侏罗系煤系作为滑脱层, 三叠系、侏罗系烃源岩分层运聚成藏, 从而使克拉苏盐下深层形成中组合和下组合两套成藏体系, 其中三叠系‒侏罗系阳霞组构成的下组合构造相对稳定, 深大断裂未向上沟通, 深层油气有效保存, 可能发育聚集了三叠系近源油气的大型油气藏, 是将来克拉苏深层勘探重点领域.Abstract: To further investigate the subsalt structure and its spatial variations within the Kelasu structural belt of the Kuqa Depression, we conducted a detailed structural interpretation of the latest high-quality 3D seismic data in this study. The findings reveal the presence of multiple subsalt décollements that significantly control the subsalt structures in the deep areas of the Kelasu structural belt. Specifically, the Jurassic coal-bearing strata emerge as the primary décollement layer beneath the salt layer. Additionally, lower décollement layer within the Triassic strata were observed in the eastern Kelasu structural belt, while they were absent in the western part. The formation of the lower décollement layer is predominantly influenced by the thickness and lithological composition of the Triassic strata, which are in turn controlled by the shape of the basement. Serving as décollement layer, the Jurassic coal-bearing strata facilitate the stratified migration and accumulation of hydrocarbons sourced from the Triassic and Jurassic formations. Consequently, this process has resulted in the development of two distinct hydrocarbon reservoir systems within the deep subsalt layers of the Kuqa Depression: the mid-combination and lower-combination reservoir systems. Notably, the lower-combination reservoir system, primarily composed of the Triassic-Jurassic Yangxia Formation, is structurally stable and is unruptured by deeply situated large-scale faults. This stability may make it conducive to reservoir development that accumulates the Triassic near-source oil and gas, which is the key target for future deep exploration in the Kelasu structural belt.
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图 1 库车坳陷构造单元划分图（a）、克拉苏构造带平面展布图（b）和地层柱状图（c）
图 1a、1b分别据王清华等（2023）、田军等（2020）修改. FIKB.克北断裂；FIBK.博孜‒克拉断裂；FIKLS.克拉苏断裂；FIKS.克深断裂；FIBC.拜城断裂
Fig. 1. Division of structural units in Kuqa Depression （a）, fault system of Kelasu structural belt （b）, stratigraphic column in Kuqa Depression （c）
图 2 克深段典型地震剖面（a）及解释结果（b）（剖面位置见图 1b）
Fig. 2. Typical seismic profile （a） and interpretation results （b） in the Keshen area
图 3 大北段典型地震剖面（a）及解释结果（b）（剖面位置见图 1b）
Fig. 3. Typical seismic profile （a） and interpretation results （b） in the Dabei area
图 4 博孜段典型地震剖面（a）及解释结果（b）（剖面位置见图 1b）
Fig. 4. Typical seismic profile （a） and interpretation results （b） in the Bozi area
图 5 克拉苏构造带东西向地震剖面（a）及解释结果（b）（剖面位置见图 1b）
Fig. 5. E-W trending seismic profile （a） and interpretation results （b） in the Kelasu structural belt
图 6 过克深5井地震剖面（a）及解释结果（b）（剖面位置见图 1b）
Fig. 6. Typical seismic profile （a） and interpretation results （b） passing through Keshen 5 Well
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Chen, H. L., Lin, X. B., Cheng, X. G., et al., 2022. Two-Phase Intracontinental Deformation Mode in the Context of India-Eurasia Collision: Insights from a Structural Analysis of the West Kunlun-Southern Junggar Transect along the NW Margin of the Tibetan Plateau. Journal of the Geological Society, 179(2): 1-14. https://doi.org/10.1144/jgs2021-029 Guan, S. W., Chen, Z. X., Li, B. L., et al., 2010. Discussions on the Character and Interpretation Model of Kelasu Deep Structures in the Kuqa Area. Petroleum Exploration and Development, 37(5): 531-536, 551 (in Chinese with English abstract). doi: 10.1016/S1876-3804(10)60053-5 Guo, C., Zhang, Z. Y., Wu, L., et al., 2022. Mesozoic- Cenozoic Coupling Process of Tianshan Denudation and Sedimentation in the Northern Margin of the Tarim Basin: Evidence from Low-Temperature Thermochronology (Kuqa River Section, Xinjiang). Earth Science, 47(9): 3417-3430 (in Chinese with English abstract). Ji, Y. L., Ding, X. Z., Li, X. C., et al., 2003. Triassic Paleogeography and Sedimentary Facies of the Kuqa Depression, Tarim Basin. Journal of Geomechanics, 9(3): 268-274 (in Chinese with English abstract). doi: 10.3969/j.issn.1006-6616.2003.03.009 Labaume, P., Moretti, I., 2001. Diagenesis-Dependence of Cataclastic Thrust Fault Zone Sealing in Sandstones. Example from the Bolivian Sub-Andean Zone. Journal of Structural Geology, 23(11): 1659-1675. https://doi.org/10.1016/S0191-8141(01)00024-4 Lei, G. L., Xie, H. W., Zhang, J. Z., et al., 2007. Structural Features and Natural Gas Exploration in the Kelasu Structural Belt, Kuqa Depression. Oil & Gas Geology, 28(6): 816-820, 835 (in Chinese with English abstract). doi: 10.3321/j.issn:0253-9985.2007.06.017 Li, S. Q., 2009. Study on Squeezed Salt Structure and Syntectonic Sedimentary Strata in the Middle-West Section of Kuqa Foreland Basin in Southern Tianshan Mountains (Dissertation). Zhejiang University, Hangzhou (in Chinese with English abstract). Li, Y., 2018. Structural Features of Late Paleozoic Paleo- Uplift and Its Control on Large-Scale Natural Gas Accumulation in Wensu-Luntai Area, Tarim Basin (Dissertation). Zhejiang University, Hangzhou (in Chinese with English abstract). Li, Z., Song, W. J., Peng, S. T., et al., 2004. Mesozoic-Cenozoic Tectonic Relationships between the Kuqa Subbasin and Tian Shan, Northwest China: Constraints from Depositional Records. Sedimentary Geology, 172(3-4): 223-249. https://doi.org/10.1016/j.sedgeo.2004.09.002 Liu, Y. L., Hu, X. F., Wang, D. X., et al., 2012. Characteristics of Triassic Lithofacies Palaeogeography in Tarim Basin. Fault-Block Oil & Gas Field, 19(6): 696-700 (in Chinese with English abstract). Liu, Z. H., Lu, H. F., Li, X. J., et al., 2000. Tectonic Evolution of Kuqa Rejuvenated Foreland Basin. Chinese Journal of Geology (Scientia Geologica Sinica), 35(4): 482-492 (in Chinese with English abstract). Lu, H. F., Howell, D. G., Jia, D., et al., 1994. Rejuvenation of the Kuqa Foreland Basin, Northern Flank of the Tarim Basin, Northwest China. International Geology Review, 36(12): 1151-1158. https://doi.org/10.1080/00206819409465509 Mount, V. S., 2014. Structural Style of the Appalachian Plateau Fold Belt, North-Central Pennsylvania. Journal of Structural Geology, 69: 284-303. https://doi.org/10.1016/j.jsg.2014.04.005 Neng, Y., Qi, J. F., Xie, H. W., et al., 2012. Structural Characteristics of Northern Margin of Kuqa Depression, Tarim Basin. Geological Bulletin of China, 31(9): 1510-1519 (in Chinese with English abstract). doi: 10.3969/j.issn.1671-2552.2012.09.014 Neng, Y., Xie, H. W., Sun, T. R., et al., 2013. Structural Characteristics of Keshen Segmentation in Kelasu Structural Belt and Its Petroleum Geological Significance. China Petroleum Exploration, 18(2): 1-6 (in Chinese with English abstract). doi: 10.3969/j.issn.1672-7703.2013.02.001 Pla, O., Roca, E., Xie, H. W., et al., 2019. Influence of Syntectonic Sedimentation and Décollement Rheology on the Geometry and Evolution of Orogenic Wedges: Analog Modeling of the Kuqa Fold-and-Thrust Belt (NW China). Tectonics, 38(8): 2727-2755. https://doi.org/10.1029/2018tc005386 Qi, J. F., Lei, G. L., Li, M. G., et al., 2009. Analysis of Structure Model and Formation Mechanism of Kelasu Structure Zone, Kuqa Depression. Geotectonica et Metallogenia, 33(1): 49-56 (in Chinese with English abstract). doi: 10.3969/j.issn.1001-1552.2009.01.007 Qi, J. F., Li, Y., Wu, C., et al., 2013. The Interpretation Models and Discussion on the Contractive Structure Deformation of Kuqa Depression, Tarim Basin. Geology in China, 40(1): 106-120 (in Chinese with English abstract). doi: 10.3969/j.issn.1000-3657.2013.01.007 Sherkati, S., Letouzey, J., Frizon de Lamotte, D., 2006. Central Zagros Fold-Thrust Belt (Iran): New Insights from Seismic Data, Field Observation, and Sandbox Modeling. Tectonics, 25(4): TC4007. https://doi.org/10.1029/2004tc001766 Song, X., 2018. Cretaceous Paleo-Uplift Restoration and Its Implications on Hydrocarbon Accumulation in the Kuqa Depression (Dissertation). China University of Petroleum, Beijing (in Chinese with English abstract). Tang, L. J., Jia, C. Z., Pi, X. J., et al., 2003. Salt-Related Structural Styles in Kuqa Foreland Fold Belt. Scientia Sinica Terrae, 33(1): 38-46 (in Chinese). Tian, J., Yang, H. J., Wu, C., et al., 2020. Discovery of Well Bozi 9 and Ultra-Deep Natural Gas Exploration Potential in the Kelasu Tectonic Zone of the Tarim Basin. Natural Gas Industry, 40(1): 11-19 (in Chinese with English abstract). Wang, F., Deng, X. L., Zheng, M. P., et al., 2022. Sedimentary-Geochemical Characteristics and Potash- Prospecting Potential of Gypsum-Salt Layer in Western Kuqa Depression. Earth Science, 47(1): 56-71 (in Chinese with English abstract). Wang, K., Cao, T., Wei, H. X., et al., 2020. The Palaeo Uplift of Late Cretaceous and Tectonic Stress Fieldreconstruction of the Eastern Kuqa Depression. Acta Geologica Sinica, 94(6): 1716-1726 (in Chinese with English abstract). doi: 10.3969/j.issn.0001-5717.2020.06.005 Wang, Q. H., Yang, H. J., Xu, Z. P., et al., 2023. Major Breakthrough and Exploration Significance of Well Ketan 1 in Kuqa Depression, Tarim Basin. China Petroleum Exploration, 28(2): 1-10 (in Chinese with English abstract). doi: 10.3969/j.issn.1672-7703.2023.02.001 Wang, W., Yin, H. W., Jia, D., et al., 2017. A Sub-Salt Structural Model of the Kelasu Structure in the Kuqa Foreland Basin, Northwest China. Marine and Petroleum Geology, 88: 115-126. https://doi.org/10.1016/j.marpetgeo.2017.08.008 Wang, X., Jia, C. Z., Yang, S. F., 2002. Geometry and Kinematics of the Kuqa Fold-and-Thrust Belt in the Southern Tianshan. Scientia Geologica Sinica, 37(3): 372-384 (in Chinese with English abstract). Wang, Z. M., 2014. Formation Mechanism and Enrichment Regularities of Kelasu Subsalt Deep Large Gas Field in Kuqa Depression, Tarim Basin. Natural Gas Geoscience, 25(2): 153-166 (in Chinese with English abstract). doi: 10.11764/j.issn.1672-1926.2014.02.0153 Wei, Q., Li, X. Q., Sun, K. X., et al., 2019. Geochemical Characteristics of Deep-Seated Natural Gas Accumulation of the Keshen Large Gas Field in the Kuqa Depression, Tarim Basin. Natural Gas Geoscience, 30(6): 897-907 (in Chinese with English abstract). Xie, H. W., Luo, H. Y., Zhang, X. Q., et al., 2020. Structural Deformation and Petroleum Exploration Potential of Subsalt Layer in Qiulitage Structural Belt, Kuqa Depression. Xinjiang Petroleum Geology, 41(4): 388-393 (in Chinese with English abstract). Xie, H. W., Yin, H. W., Tang, Y. G., et al., 2015. Research on Subsalt Structure in the Central Kelasu Structure Belt Based on the Area-Depth Technique. Geotectonica et Metallogenia, 39(6): 1033-1040 (in Chinese with English abstract). Yang, H. J., Li, Y., Tang, Y. G., et al., 2019. Discovery of Kelasu Subsalt Deep Large Gas Field, Tarim Basin. Xinjiang Petroleum Geology, 40(1): 12-20 (in Chinese with English abstract). Yang, H. J., Li, Y., Tang, Y. G., et al., 2021. Accumulation Conditions, Key Exploration and Development Technologies for Keshen Gas Field in Tarim Basin. Acta Petrolei Sinica, 42(3): 399-414 (in Chinese with English abstract). Yang, K. J., Qi, J. F., Liu, A. R., et al., 2022. Characteristics of Basement Faults in the Middle Section of Kuqa Depression and Their Influence on Salt Tectonic Deformation. Chinese Journal of Geology, 57(4): 991-1008 (in Chinese with English abstract). Yang, K. J., Qi, J. F., Ma, B. J., et al., 2018. Differential Tectonic Deformation of Subsalt and Suprasalt Strata in Kuqa Depression and Their Controlling Factors. Geotectonica et Metallogenia, 42(2): 211-224 (in Chinese with English abstract). Yang, M. Z., Liu, J., Liu, Y. L., et al., 2015. Analysis on the Development Characteristics of Double Detachment Structure in Kuqa Foreland Thrust Belt. Petroleum Geology and Engineering, 29(2): 15-18 (in Chinese with English abstract). doi: 10.3969/j.issn.1673-8217.2015.02.004 Yang, X. W., Wang, Q. H., Li, Y., et al., 2022. Formation Mechanism of the Bozi-Dabei Trillion Cubic Natural Gas Field, Kuqa Foreland Thrust Belt. Earth Science Frontiers, 29(6): 175-187 (in Chinese with English abstract). Yin, H. W., Wang, Z., Wang, X., et al., 2011. Characteristics and Mechanics of Cenozoic Salt-Related Structures in Kuqa Foreland Basins: Insights from Physical Modeling and Discussion. Geological Journal of China Universities, 17(2): 308-317 (in Chinese with English abstract). doi: 10.3969/j.issn.1006-7493.2011.02.016 管树巍, 陈竹新, 李本亮, 等, 2010. 再论库车克拉苏深部构造的性质与解释模型. 石油勘探与开发, 37(5): 531-536, 551. 郭超, 张志勇, 吴林, 等, 2022. 中新生代天山剥蚀与塔里木盆地北缘沉积耦合过程: 新疆库车河剖面的低温热年代学证据. 地球科学, 47(9): 3417-3430. doi: 10.3799/dqkx.2022.152 纪云龙, 丁孝忠, 李喜臣, 等, 2003. 塔里木盆地库车坳陷三叠纪沉积相与古地理研究. 地质力学学报, 9(3): 268-274. doi: 10.3969/j.issn.1006-6616.2003.03.009 雷刚林, 谢会文, 张敬洲, 等, 2007. 库车坳陷克拉苏构造带构造特征及天然气勘探. 石油与天然气地质, 28(6): 816-820, 835. doi: 10.3321/j.issn:0253-9985.2007.06.017 李世琴. 2009. 南天山库车前陆盆地中‒西段挤压盐构造及同构造沉积地层研究(博士学位论文). 杭州: 浙江大学. 李勇, 2018. 塔里木温宿‒轮台晚古生代古隆起及对大型天然气聚集的控制(博士学位论文). 杭州: 浙江大学. 刘亚雷, 胡秀芳, 王道轩, 等, 2012. 塔里木盆地三叠纪岩相古地理特征. 断块油气田, 19(6): 696-700. 刘志宏, 卢华复, 李西建, 等, 2000. 库车再生前陆盆地的构造演化. 地质科学, 35(4): 482-492. doi: 10.3321/j.issn:0563-5020.2000.04.012 能源, 漆家福, 谢会文, 等, 2012. 塔里木盆地库车坳陷北部边缘构造特征. 地质通报, 31(9): 1510-1519. doi: 10.3969/j.issn.1671-2552.2012.09.014 能源, 谢会文, 孙太荣, 等, 2013. 克拉苏构造带克深段构造特征及其石油地质意义. 中国石油勘探, 18(2): 1-6. doi: 10.3969/j.issn.1672-7703.2013.02.001 漆家福, 雷刚林, 李明刚, 等, 2009. 库车坳陷克拉苏构造带的结构模型及其形成机制. 大地构造与成矿学, 33(1): 49-56. doi: 10.3969/j.issn.1001-1552.2009.01.007 漆家福, 李勇, 吴超, 等, 2013. 塔里木盆地库车坳陷收缩构造变形模型若干问题的讨论. 中国地质, 40(1): 106-120. 宋叙, 2018. 库车坳陷白垩纪古隆起恢复及油气成藏效应研究(博士学位论文). 北京: 中国石油大学. 汤良杰, 贾承造, 皮学军, 等, 2003. 库车前陆褶皱带盐相关构造样式. 中国科学: 地球科学, 33(1): 38-46. 田军, 杨海军, 吴超, 等, 2020. 博孜9井的发现与塔里木盆地超深层天然气勘探潜力. 天然气工业, 40(1): 11-19. 王凡, 邓小林, 郑绵平, 等, 2022. 新疆库车坳陷西段膏盐层沉积、地球化学特征及找钾方向. 地球科学, 47(1): 56-71. doi: 10.3799/dqkx.2021.245 王珂, 曹婷, 魏红兴, 等, 2020. 库车坳陷东部晚白垩世古隆起及构造应力场恢复. 地质学报, 94(6): 1716-1726. doi: 10.3969/j.issn.0001-5717.2020.06.005 王清华, 杨海军, 徐振平, 等, 2023. 塔里木盆地库车坳陷克探1井重大突破与勘探意义. 中国石油勘探, 28(2): 1-10. 汪新, 贾承造, 杨树锋, 2002. 南天山库车褶皱冲断带构造几何学和运动学. 地质科学, 37(3): 372-384. 王招明, 2014. 塔里木盆地库车坳陷克拉苏盐下深层大气田形成机制与富集规律. 天然气地球科学, 25(2): 153-166. 魏强, 李贤庆, 孙可欣, 等, 2019. 塔里木盆地库车坳陷克深大气田深层天然气成藏地球化学特征. 天然气地球科学, 30(6): 897-907. 谢会文, 罗浩渝, 章学岐, 等, 2020. 秋里塔格构造带盐下构造层变形特征及油气勘探潜力. 新疆石油地质, 41(4): 388-393. 谢会文, 尹宏伟, 唐雁刚, 等, 2015. 基于面积深度法对克拉苏构造带中部盐下构造的研究. 大地构造与成矿学, 39(6): 1033-1040. 杨海军, 李勇, 唐雁刚, 等, 2019. 塔里木盆地克拉苏盐下深层大气田的发现. 新疆石油地质, 40(1): 12-20. 杨海军, 李勇, 唐雁刚, 等, 2021. 塔里木盆地克深气田成藏条件及勘探开发关键技术. 石油学报, 42(3): 399-414. 杨克基, 漆家福, 刘傲然, 等, 2022. 库车坳陷中段基底断裂特征及其对盐构造变形的影响. 地质科学, 57(4): 991-1008. 杨克基, 漆家福, 马宝军, 等, 2018. 库车坳陷克拉苏构造带盐上和盐下构造变形差异及其控制因素分析. 大地构造与成矿学, 42(2): 211-224. 杨茂智, 刘军, 刘永雷, 等, 2015. 库车前陆冲断带双滑脱构造发育特点分析. 石油地质与工程, 29(2): 15-18. 杨学文, 王清华, 李勇, 等, 2022. 库车前陆冲断带博孜‒大北万亿方大气区的形成机制. 地学前缘, 29(6): 175-187. 尹宏伟, 王哲, 汪新, 等, 2011. 库车前陆盆地新生代盐构造特征及形成机制: 物理模拟和讨论. 高校地质学报, 17(2): 308-317. -
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