柴北缘侏罗系多种能源矿产富集共生与成藏（矿）系统研究
发布时间：2018-08-09 08:20
【摘要】：柴达木盆地是我国西北地区三大沉积盆地之一,侏罗纪盆地的沉积范围大致分布在现今的柴达木盆地北缘,多年的勘探实践表明,在柴北缘不仅有石油、天然气、煤等常规能源矿产富集,同时也具备煤层气、油页岩、油砂等非常规能源矿产的勘探开发潜力。常规油气在冷湖、南八仙、马海和鱼卡地区富集,层位是J1、J3、E和N;煤沿赛什腾、鱼卡、红山、德令哈等山前带富集,可采煤层是J1x、J2d和J2s。从非常规能源的评价标准和富集参数看,煤层气在赛什腾、鱼卡、红山和德令哈地区富集,层位主要是J2;油页岩在鱼卡、红山和德令哈地区富集,层位是J1和J2;油砂在冷湖、鱼卡、红山和路乐河地区富集,层位是J和K。根据断裂系统和各单一能源矿产的分布,柴北缘可划分为3个多种能源矿产成藏(矿)系统:冷湖-南八仙-马海多种能源矿产成藏(矿)系统、赛什腾-鱼卡-红山多种能源矿产成藏(矿)系统和德令哈多种能源矿产成藏(矿)系统。侏罗系地层的热演化是各系统内能源矿产的形成、分布、组合共生的基础,结合柴北缘4口人工单井热演化模拟分析,赛什腾-鱼卡-红山成藏(矿)系统侏罗系地层开始成熟时间最早(150~135Ma),德令哈成藏(矿)系统侏罗系地层次之(120Ma)。冷湖-南八仙-马海系统最晚(40Ma)。赛什腾-鱼卡-红山成藏(矿)系统的矿产组合共生类型明显多于其余2个系统。总体上柴北缘油页岩、常规石油和油砂,煤、煤层气和常规天然气可单向连续转化并在规模上相互影响和制约。早、中侏罗世温暖潮湿的河湖沉积环境下富集的有机质是柴北缘多种有机能源矿产的物质来源。燕山晚期和喜山晚期两期构造运动对各有机能源矿产的成藏定位和后期改造影响最大。最终冷湖-南八仙-马海成藏(矿)系统形成了“常规油-常规气-油砂”的富集共生模式;赛什腾-鱼卡-红山成藏(矿)系统形成了“油页岩-常规油-油砂-煤-煤层气”的富集共生模式;德令哈成藏(矿)系统形成了“煤-煤层气-油页岩”的富集共生模式。
[Abstract]:The Qaidam basin is one of the three major sedimentary basins in northwest China. The sedimentary range of Jurassic basin is roughly distributed in the northern margin of the present Qaidam basin. The exploration practice for many years shows that there are not only oil and natural gas in the northern margin of Qaidam Basin, but also petroleum and natural gas in the northern margin of Qaidam Basin. Coal and other conventional energy mineral enrichment, but also have coal bed methane, oil shale, oil sand and other unconventional energy mineral exploration and development potential. Conventional oil and gas are enriched in Lenghu, Nanbaxian, Mahai and Yuka areas, and the strata are J1, J3, E and N.The coal is enriched along the front belts of Saishiteng, Yuka, Hongshan and Delingha, and the mining coal seams are J1xJ2d and J2s. Judging from the evaluation criteria and enrichment parameters of unconventional energy sources, the coalbed methane is enriched in the Saeston, Yuka, Hongshan and Delingha areas, with the mainly J22-oil shale enriched in the Yuka, Hongshan and Delingha areas, with layers J1 and J2; and oil sands in Lenghu. The Yuka, Hongshan and Lule River areas are enriched with J and K. According to the fault system and the distribution of each single energy mineral, the northern margin of Qaidam can be divided into three kinds of energy mineral reservoir forming (ore) system: Lenghu-Nanbaxian Mahai multi-energy mineral accumulation (ore) system. Saeston-Yuka-Hongshan multi-energy mineral accumulation (ore) system and Delingha multi-energy mineral accumulation (ore) system. The thermal evolution of Jurassic strata is the basis of the formation, distribution and assemblage of energy minerals in each system, combined with the simulation analysis of thermal evolution of 4 artificial single wells in the northern margin of Qaidam. The Jurassic strata matured the earliest (150~135Ma) and the Jurassic stratigraphic level (120Ma) of Delingha reservoir (ore) system in Saishiten-Yuka-Hongshan reservoir formation (ore) system. The Lenghu-South eight Sian-Ma Hai system is the latest (40Ma). The mineral assemblage symbiosis type of Saishiteng-Yuka-Hongshan reservoir forming (ore) system is obviously more than that of the other two systems. On the whole, oil shale, conventional petroleum and oil sand, coalbed methane and conventional natural gas in the northern margin of Qaihai can be transformed in one direction and continuously, and influence and restrict each other in scale. The organic matter enriched in the warm and humid fluvial and lacustrine sedimentary environment in the early and Middle Jurassic is the material source of many organic energy minerals in the northern margin of Qaidam. The late Yanshanian and the late Himalayan tectonic movements have the greatest influence on the location and later transformation of the organic energy minerals. Finally, the Lenghu-Nanbaxian Mahai oil accumulation (ore) system formed a "conventional oil-conventional gas-oil sand" enrichment and symbiotic model; The accumulation and symbiosis model of "oil shale-conventional oil-sand-coalbed methane" was formed in Saishiteng-Yuka-Hongshan reservoir forming (ore) system, and the accumulation and symbiosis mode of "coal-coalbed methane-oil shale" was formed in Delingha reservoir (ore) system.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.1
，
本文编号：2173492
[Abstract]:The Qaidam basin is one of the three major sedimentary basins in northwest China. The sedimentary range of Jurassic basin is roughly distributed in the northern margin of the present Qaidam basin. The exploration practice for many years shows that there are not only oil and natural gas in the northern margin of Qaidam Basin, but also petroleum and natural gas in the northern margin of Qaidam Basin. Coal and other conventional energy mineral enrichment, but also have coal bed methane, oil shale, oil sand and other unconventional energy mineral exploration and development potential. Conventional oil and gas are enriched in Lenghu, Nanbaxian, Mahai and Yuka areas, and the strata are J1, J3, E and N.The coal is enriched along the front belts of Saishiteng, Yuka, Hongshan and Delingha, and the mining coal seams are J1xJ2d and J2s. Judging from the evaluation criteria and enrichment parameters of unconventional energy sources, the coalbed methane is enriched in the Saeston, Yuka, Hongshan and Delingha areas, with the mainly J22-oil shale enriched in the Yuka, Hongshan and Delingha areas, with layers J1 and J2; and oil sands in Lenghu. The Yuka, Hongshan and Lule River areas are enriched with J and K. According to the fault system and the distribution of each single energy mineral, the northern margin of Qaidam can be divided into three kinds of energy mineral reservoir forming (ore) system: Lenghu-Nanbaxian Mahai multi-energy mineral accumulation (ore) system. Saeston-Yuka-Hongshan multi-energy mineral accumulation (ore) system and Delingha multi-energy mineral accumulation (ore) system. The thermal evolution of Jurassic strata is the basis of the formation, distribution and assemblage of energy minerals in each system, combined with the simulation analysis of thermal evolution of 4 artificial single wells in the northern margin of Qaidam. The Jurassic strata matured the earliest (150~135Ma) and the Jurassic stratigraphic level (120Ma) of Delingha reservoir (ore) system in Saishiten-Yuka-Hongshan reservoir formation (ore) system. The Lenghu-South eight Sian-Ma Hai system is the latest (40Ma). The mineral assemblage symbiosis type of Saishiteng-Yuka-Hongshan reservoir forming (ore) system is obviously more than that of the other two systems. On the whole, oil shale, conventional petroleum and oil sand, coalbed methane and conventional natural gas in the northern margin of Qaihai can be transformed in one direction and continuously, and influence and restrict each other in scale. The organic matter enriched in the warm and humid fluvial and lacustrine sedimentary environment in the early and Middle Jurassic is the material source of many organic energy minerals in the northern margin of Qaidam. The late Yanshanian and the late Himalayan tectonic movements have the greatest influence on the location and later transformation of the organic energy minerals. Finally, the Lenghu-Nanbaxian Mahai oil accumulation (ore) system formed a "conventional oil-conventional gas-oil sand" enrichment and symbiotic model; The accumulation and symbiosis model of "oil shale-conventional oil-sand-coalbed methane" was formed in Saishiteng-Yuka-Hongshan reservoir forming (ore) system, and the accumulation and symbiosis mode of "coal-coalbed methane-oil shale" was formed in Delingha reservoir (ore) system.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.1
，
本文编号：2173492
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