Numerical simulation of gas hydrate migration-accumulation system and trial mining optimization of orebodies in the Shenhu area
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摘要:
为了进一步了解南海北部陆坡神狐海域勘探区天然气水合物成藏系统特征，优选天然气水合物优势矿体，基于经过矿体的地震剖面资料，结合区域成藏地质条件，分别构建了勘探区W17和W18两个矿体的二维地质模型，从天然气水合物成藏的稳定域、气源形成、运移输导及储集成藏进行了系统数值模拟。结果表明：①神狐勘探区成矿气源丰富，来自浅层的生物成因气和深层的热成因气都可作为天然气水合物成藏的气源；②神狐勘探区流体输导条件良好，深部大断裂可以作为油源断裂沟通深部源岩，是连接深部热成因气的主要通道，浅部调节性断裂和渗透性砂岩一起作为横向+垂向复合输导；③在神狐勘探区稳定域内，区域构造部位相对高、断块封闭性相对好、渗透率相对大的区域为天然气水合物成藏的有利储集层；④综合分析认为，W17矿体比W18矿体在气源、运移及储层特性上更具优势，应作为优先考虑的试采矿体。
Abstract:Based on seismic profile data of natural gas hydrate exploration in Shenhu area in the north of South China Sea, combined with geological conditions of regional accumulation, the 2D geological models for the W17 and W18 orebodies in the exploration area were constructed respectively to further understand the gas hydrate accumulation system in Shenhu exploration area of the northern continental slope of South China Sea.A systematic simulation was carried out to test gas hydrate stability zone, gas source formation, migration and accumulation.The results show that: a.the Shenhu exploration area is rich in gas sources, and both the shallow biogenic gas and the deep thermogenic gas can be used as gas sources for hydrate accumulation; b.the Shenhu exploration area has excellent transport system where the deep fault can be used as source fault to connect the deep source rocks and serves as the main channel connecting the deep thermal gas, and the shallow regulatory fracture and permeable sandstone serve as transverse and vertical transportation; c.the areas with relatively good sealing property of fault blocks and relatively high permeability are favorable reservoirs for gas hydrate accumulation.According to the comprehensive analysis, the orebody W17 has more advantages than the orebody W18 in gas source, migration and reservoir characteristics, so it should be considered as a priority for trial mining.
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[1] Kvenvolden K A, Redden G D, McMenamin M A. Hydrocarbon gases in sediment of the shelf, slope, and basin of the Bering Sea[J]. Geochimica et Cosmochimica Acta, 1980, 44(8): 1145-1150. doi: 10.1016/0016-7037(80)90068-X
[2] 卢振权, 吴能友, 陈建文, 等. 试论天然气水合物成藏系统[J]. 现代地质, 2008, 22(3): 363-375. doi: 10.3969/j.issn.1000-8527.2008.03.004
[3] 苏丕波, 何家雄, 梁金强, 等. 南海北部陆坡深水区天然气水合物成藏系统及其控制因素[J]. 海洋地质前沿, 2017, 33(7): 1-10. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDT201707001.htm
[4] 吴能友, 梁金强, 王宏斌, 等. 海洋天然气水合物成藏系统研究进展[J]. 现代地质, 2008, 22(3): 356-362. doi: 10.3969/j.issn.1000-8527.2008.03.003
[5] 苏丕波, 梁金强, 张伟, 等. 南海北部神狐海域天然气水合物成藏系统[J]. 天然气工业, 2020, 4(8): 77-89. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201803022.htm
[6] 庞雄, 陈长民, 邵磊, 等. 白云运动: 南海北部渐新统-中新统重大地质事件及其意义[J]. 地质论评, 2007, 53(2): 145-151. doi: 10.3321/j.issn:0371-5736.2007.02.001
[7] 孙龙涛, 周蒂, 陈长民, 等. 珠江口盆地白云凹陷断裂构造特征及其活动期次[J]. 热带海洋学报, 2008, 27(2): 25-31. doi: 10.3969/j.issn.1009-5470.2008.02.005
[8] 付少英. 烃类成因对天然气水合物成藏的控制[J]. 地学前缘, 2005, 12(3): 263-267. doi: 10.3321/j.issn:1005-2321.2005.03.029
[9] 梁永兴, 曾溅辉, 郭依群, 等. 神狐钻探区天然气水合物成藏地质条件分析[J]. 现代地质, 2013, 27(2): 425-434. doi: 10.3969/j.issn.1000-8527.2013.02.022
[10] 雷新民, 张光学, 郑艳. 南海北部神狐海域天然气水合物形成及分布的地质因素[J]. 海洋地质前沿, 2009, 25(5): 1-5. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDT200905002.htm
[11] 张树林. 珠江口盆地白云凹陷天然气水合物成藏条件及资源量前景[J]. 中国石油勘探, 2007, 12(6): 23-27. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY200706006.htm
[12] 苏丕波, 梁金强, 沙志彬, 等. 神狐深水海域天然气水合物成藏的气源条件[J]. 西南石油大学学报(自然科学版), 2014, 36(2): 1-8. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY201402001.htm
[13] 苏丕波, 雷怀彦, 梁金强, 等. 神狐海域气源特征及其对天然气水合物成藏的指示意义[J]. 天然气工业, 2010, (10): 103-108. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201010035.htm
[14] 苏正, 曹运诚, 杨睿, 等. 南海北部神狐海域天然气水合物成藏模式研究[J]. 地球物理学报, 2014, 57(5): 1664-1674. https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX201405029.htm
[15] 苏丕波, 梁金强, 沙志彬, 等. 南海北部神狐海域天然气水合物成藏动力学模拟[J]. 石油学报, 2011, 32(2): 226-233. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201102007.htm
[16] 郭小文. 含油气盆地生烃增压演化研究以东营凹陷和白云凹陷为例[D]. 中国地质大学(武汉)博士学位论文, 2010.
[17] 傅宁, 米立军, 张功成. 珠江口盆地白云凹陷烃源岩及北部油气成因[J]. 石油学报, 2007, 28(3): 32-32. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200703006.htm
[18] Welte D H, Hantschel T, Wygrala B. Petroleum Systems and the Role of Multi-Dimensional Basin Modeling[C]//Proceedings of an International Conference on Petroleum Systems of SE Asia and Australasia, 1997.
[19] 高红芳, 杜德莉, 钟广见. 珠江口盆地沉降史定量模拟和分析[J]. 南海地质研究, 2006, 000(001): 11-20. https://www.cnki.com.cn/Article/CJFDTOTAL-NHDZ200600004.htm
[20] 赵长煜. 南海大陆边缘盆地构造热演化模拟[D]. 中国地质大学(北京)博士学位论文, 2012.
[21] Kaul N, Rosenberger A, Villinger H. Comparison of measured and BSR-derived heat flow values, Makran accretionary prism, Pakistan[J]. Marine Geology, 2000, 164(1/2): 37-51. http://www.sciencedirect.com/science/article/pii/S0025322799001255
[22] 王淑红, 宋海斌, 颜文. 天然气水合物稳定带的计算方法与参数选择探讨[J]. 现代地质, 2005, 19(1): 101-107. https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ20050100E.htm
[23] Gautier D L, Dolton G L, Takahashi K I, et al. 1996, 1995 National Assessment of United States Oil and Gas Resources Results, methodology, and supporting data: U.S. Geological Survey Digital Data Series DDS- 30, release 2, one CDROM.
[24] Collett T S, Dallimore S R. Detailed Analysis of Gas Hydrate Induced Drilling and Production Hazards[C]//Proceedings of the 4th International Conference on Gas Hydrates, Yokohama, Japan, 19-23 April 2002, 63.
[25] Dallimore S R, Collett T S. Scientific Results from the Mallik 2002 Gas Hydrate Production Research Well Program, Mackenzie Delta, Northwest Territories, Canada[M]. Bulletin of the Geological Survey of Canada, 2005.
[26] 苏丕波, 梁金强, 付少英, 等. 南海北部天然气水合物成藏地质条件及成因模式探讨[J]. 中国地质, 2017, 44(3): 415-427. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI201703002.htm
[27] Su P, Liang J, Peng J, et al. Petroleum systems modeling on gas hydrate of the first experimental exploitation region in the Shenhu area, northern South China sea[J]. Journal of Asian Earth Sciences, 2018, 168(DEC. ): 57-76. http://www.sciencedirect.com/science/article/pii/S1367912018303389
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