Main Controlling Factors of Accumulation and Exploration Breakthrough of Deep-Water Submarine Fan Lithologic Trap in the Qiongdongnan Basin
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摘要: 为研究琼东南盆地乐东-陵水凹陷中新统梅山组海底扇面临圈闭有效性与油气富集规律关键问题. 综合海底扇沉积储层特征、圈闭形成与侧封条件、天然气运聚分析，明确梅山组海底扇岩性圈闭成藏主控因素. 结果表明：（1）北物源海底扇主要分布于北斜坡区，凹陷带发育西部昆嵩隆起物源影响海底扇向凹推进远、储层物性较好；（2）发育对接水道泥岩、对接水道砂岩、岩性尖灭、断层侧封4种圈闭类型；（3）天然气为崖城组烃源岩供源的成熟-高熟天然气，具有“源内大型构造脊汇聚、沟源断裂/裂隙带垂向运移+砂岩侧向输导，有效圈闭富集”天然气成藏模式. 针对凹陷带尖灭型和对接水道泥岩型圈闭分别部署钻探，均获得勘探突破，明确了下步拓展方向.Abstract: To study the key problems restricting exploration are the traps effectiveness and gas enrichment rule. Based on the analysis of submarine fan reservoir characteristics, trap formation and lateral sealing conditions, natural gas migration and accumulation, the main controlling factors of deep-water submarine fan traps large-scale accumulation is researched. The results show that: (1)The submarine fan coming from Hainan uplift is mainly distributed in the northern slope area, and the submarine fan in the depression zone coming from the western Kunsong uplift develop large-scale advancing far into the sag, and the physical properties of the reservoir become better. (2)The types of trap lateral sealing mechanisms are establishing, including sealed by mudstone channel type, sealed by sandstone channel type, lithological pinch-out type and fault lateral sealing type. (3)The mature to high mature natural gas of Meishan submarine fan were supplied by source rock of Yacheng formation, Accumulation mode was large-scale structural ridge convergence in source rock, vertical and lateral migration system with fault or fracture and sandstone, and effective traps cotrolling accumulation. It has been made breakthroughs in lithological pinch-out type and sealed by mudstone channel type, and the next expansion direction is explicited.
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图 1 琼东南盆地构造区划图与地层柱状图
Fig. 1. Structural zoning map and stratum histogram of the Qiongdongnan Basin
图 2 乐东-陵水凹陷已钻井天然气成因判识图
判识图中界线划分据戴金星（1993）
Fig. 2. Origin and maturity of natural gas in the Ledong-Lingshui Sag
图 3 乐东-陵水凹陷钻井地层锆石年龄谱分布图
锆石测年在德克萨斯大学奥斯汀分校年代学实验室分析
Fig. 3. Age spectrum distribution of zircon from drilling strata of Ledong-Lingshui Sag
图 4 过琼东南盆地乐东凹陷典型地震剖面与乐东-陵水凹陷梅山组平面沉积相图
Fig. 4. Typical seismic profile of Ledong sag in Qiongdongnan basin and plane sedimentary facies of Meishan formation in the Ledong-Lingshui Sag
图 5 乐东-陵水凹陷梅山组储层典型显微照片
a. L25E井，3 966 m（去水深3 081.4 m），梅山组一段下，粉-极细砂岩，F=23.9%，K=28.6 mD，粒间孔（IP）为主，局部见有粒内溶孔（IDP）；b. Y35井，4 816.48 m，梅山组一段上，粗-极粗砂岩，F=10.6%，K=0.7 mD，粒间孔（IP）为主，局部见有粒内溶孔（IDP）；c.L25W井，4 045.20 m（去水深3 136.40 m），梅山组一段上，粉砂岩，F=24.4%，K=49.1 mD，粒间孔（IP）为主
Fig. 5. Reservoir typical micro-photograph from Meishan formation in the Ledong-Lingshui sag
图 6 乐东-陵水凹陷深水海底扇岩性圈闭侧封模式图
Fig. 6. Lithologic trap sealing models of deep-water submarine fan in Ledong-Lingshui sag
图 7 乐东-陵水凹陷带梅山组储层包裹体均一温度与单点埋藏史图
Fig. 7. Uniform temperature of reservoir inclusions from Meishan Formation and single point burial history in the Ledong-Lingshui sag
图 8 乐东凹陷崖城组顶面构造、裂隙与梅山组海底扇体叠合图
Fig. 8. Superposition of top structure of Yacheng Formation-fissure-submarine fan of Meishan Formation in Ledong Sag
图 9 乐东-陵水凹陷中新统梅山组区域成藏模式图
Fig. 9. Regional hydrocarbon accumulation model of Miocene Meishan formation in Ledong-Lingshui Sag
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Dai, J. X., 1993. Carbon/ Hydrogen Isotope Characteristic and Identification of Various Natural Gases. Natural Gas Geoscience, 4(2, 3): 1-40(in Chinese with English abstract). Fan, C. W., Li, X. S., Liu, K., et al., 2016. Hydrocarbon Accumulation Condition of Miocene Litho-Stratigraphic Trap in Ledong & Lingshui Sags. Qiongdongnan Basin, 28(2): 53-59(in Chinese with English abstract). Gong, C. L., Sztanó, O., Steel, R. J., et al., 2019. Critical Differences in Sediment Delivery and Partitionin G between Marine and Lacustrine Basins. GSA Bulletin. 131: 766-781. doi: 10.1130/B32042.1 Han, J. H., Leng, J. G., Wang, Y. M., 2016. Characteristics and Genesis of the Polygonal Fault System in Southern Slope of the Qiongdongnan Basin, South China Sea. Marine and Petroleum Geology, 70: 163-174. doi: 10.1016/j.marpetgeo.2015.11.022 Huang, B. J., Wang, Z. F., Liang, G., et al., 2014. Natural Gas Source and Migration-Accumulation Pattern in the Central Canyon, the Deep Water Area, Qiongdongnan Basin. China Offshore Oil and Gas, 26(5): 8-14(in Chinese with English abstract). Lei, C., Ren, J. Y., 2011. Tectonic Framework and Episodic Evolution of Deep Water Area in Qiongdongnan Basin. Earth Science, 36(1): 151-162(in Chinese with English abstract). Lei, C., Ren, J. Y., Tong, D. J., 2013. Dynamic Mechanism of Basin Development in the Northern Ocean Continent Transition Zone of the South China Sea. Acta Geophysica Sinica, 56(4): 1287-1299(in Chinese with English abstract). Neng, Y., Wu, J. F., Qi, J. F., et al., 2013. Three Layer Structure and Tectonic Evolution of Cenozoic Basins in Deep Water Area of Northern South China Sea. Acta geologica Sinica, 87(3): 403-414(in Chinese with English abstract). doi: 10.3969/j.issn.0001-5717.2013.03.010 Wang, Z. F., Li, X. S., Sun, Z. P., et al., 2011. Hydrocarbon Accumulation Conditions and Exploration Potential in the Deep-Water Region, Qiongdongnan Basin. China Offshore Oil and Gas, 23(1): 7-13(in Chinese with English abstract). doi: 10.3969/j.issn.1673-1506.2011.01.002 Wang, Z. F., Sun, Z. P., Zhang, Y. Z., et al., 2016. Distribution and Hydrocarbon Accumulation Mechanism of the Giant Deepwater Central Canyon Gas Field in Qiongdongnan Basin, Northern South China Sea. China Petroleum Exploration, 21(4): 54-64(in Chinese with English abstract). doi: 10.3969/j.issn.1672-7703.2016.04.006 Xie, Y. H., Fan, C. W., Zhou, J. X., et al., 2016. Sedimentary Features and Controlling Factors of the Gravity Flows in Submarine Fan of Middle Miocene in the Qiongdongnan Basin. Natural Gas Geoscience, 27(2): 220-228(in Chinese with English abstract Xu, C. G., Fan, C. W., 2021. New Exploration and Thinking of Offshore Lage-Medium-Size Oil and Gas Fields in the Wastern South China Sea. China Offshore Oil and Gas, 33(2): 13-25(in Chinese with English abstract). Xu, X. D., Zhang, Y. Z., Liang, G., et al., 2016. Hydrocarbon Source Condition and Accumulation Mechanism of Natural Gas in Deepwater Area of Qiongdongnan Basin, Northern South China Sea. Natural Gas Geoscience, 27(11): 1985-1992(in Chinese with English abstract). doi: 10.11764/j.issn.1672-1926.2016.11.1985 You, L., Jiang, R. F., Xu, S. L., et al., 2021. Accumulation Characteristics and Exploration Potential of Meishan Formation gas in Ledong-Lingshui Sag, Deep Water Area of Qiongdongnan Basin. China Offshore Oil and Gas, 33(4): 24-31(in Chinese with English abstract). You, L., Liu, C., Zhong, J., et al., 2017. Petrography-Geochemistry and Source Significance of Submarine Fan from West Area of Qiongdongnan Basin. Earth Science, 42(9): 1531-1540(in Chinese with English abstract). You, L., Xu, S. L., Mao, X. L., et al., 2021. Reservoir Characteristics and Genetic Mechanisms of the Mesozoic Granite Buried Hills in the Deep-Water of the Qiongdongnan Basin, Northern South China Sea. Acta Geologica Sinica (English Edition), 95(1): 259-267. doi: 10.1111/1755-6724.14635 Zhang, Y. Z., Qi, J. F., Wu, J. F., 2019. Fault Systems and Tectonic Dynamic Factors of Cenozoic Basins in the Northern South China Sea. Earth Science, 44(2): 603-625(in Chinese with English abstract). Zhu, W. L., Zhang, G. C., Gao, L., 2008. Geological Characteristics and Exploration Objectives of Hydrocarbons in the Northern Continental Margin Basin of South China Sea. Acta Petrolei Sinica, (1): 1-9(in Chinese with English abstract). Zuo, Q. M., Zhang, D. J., He, W. J., et al., 2015. Provenance Analysis of Huangliu Formation of the Central Canyon System in the Deepwater Area of the Qiongdongnan Basin. Haiyang Xuebao, 37(5): 15-23(in Chinese with English abstract). 戴金星, 1993. 天然气碳氢同位素特征和各类天然气鉴别. 天然气地球科学, 4(2, 3): 1-40. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX1993Z1000.htm 范彩伟, 李绪深, 刘昆, 等, 2016. 琼东南盆地乐东、陵水凹陷中新统岩性地层圈闭成藏条件. 中国海上油气, 28(2): 53-59. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD201602006.htm 黄保家, 王振峰, 梁刚, 2014. 琼东南盆地深水区中央峡谷天然气来源及运聚模式. 中国海上油气, 26(5): 8-14. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD201405002.htm 雷超, 任建业, 裴健翔, 等, 2011. 琼东南盆地深水区构造格局和幕式演化过程. 地球科学, 36(1): 151-162. doi: 10.3799/dqkx.2011.016 雷超, 任建业, 佟殿君, 2013. 南海北部洋陆转换带盆地发育动力学机制. 地球物理学报, 56(4): 1287-1299. https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX201304025.htm 能源, 吴景富, 漆家福, 等, 2013. 南海北部深水区新生代盆地三层结构及其构造演化. 地质学报, 87(3): 403-414. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201303011.htm 王振峰, 李绪深, 孙志鹏, 等, 2011. 琼东南盆地深水区油气成藏条件和勘探潜力. 中国海上油气, 23(1): 7-13. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD201101001.htm 王振峰, 孙志鹏, 张迎朝, 等, 2016. 南海北部琼东南盆地深水中央峡谷大气田分布与成藏规律. 中国石油勘探, 21(4): 54-64. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201604007.htm 谢玉洪, 范彩伟, 周家雄, 等, 2016. 琼东南盆地中中新世重力流海底扇沉积特征及控制因素. 天然气地球科学, 27(2): 220-228. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201602004.htm 徐新德, 张迎朝, 梁刚, 等, 2016. 南海北部琼东南盆地深水区烃源条件及天然气成藏机制. 天然气地球科学, 27(11): 1985-1992. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201611006.htm 徐长贵, 范彩伟, 2021. 南海西部近海大中型油气田勘探新进展与思考. 中国海上油气, 33(2): 13-25. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD202102002.htm 尤丽, 江汝锋, 徐守立, 等, 2021. 琼东南盆地深水区乐东-陵水凹陷梅山组天然气成藏特征与勘探潜力. 中国海上油气, 33(5): 24-31. https://www.cnki.com.cn/Article/CJFDTOTAL-ZHSD202105003.htm 尤丽, 刘才, 钟佳, 等, 2017. 琼东南盆地西区梅山组海底扇岩相-地球化学特征及源区意义. 地球科学, 42(9): 1531-1540. doi: 10.3799/dqkx.2017.503 张远泽, 漆家福, 吴景富, 2019. 南海北部新生代盆地断裂系统及构造动力学影响因素. 地球科学, 44(2): 603-625. doi: 10.3799/dqkx.2018.542 朱伟林, 张功成, 高乐, 2008. 南海北部大陆边缘盆地油气地质特征与勘探方向. 石油学报, (1): 1-9. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200801002.htm 左倩媚, 张道军, 何卫军, 等, 2015. 琼东南盆地深水区中央峡谷黄流组物源特征. 海洋学报, 37(5): 15-23. https://www.cnki.com.cn/Article/CJFDTOTAL-SEAC201611011.htm -
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