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天然气成藏已经成为目前的研究热点之一.通过对塔里木盆地顺南地区奥陶系44块样品进行成岩观察、流体包裹体系统分析、碳氧同位素分析测试和激光拉曼探针测试,对区内的热流体活动及热液矿物进行了识别,并对可能的热流体活动和油气成藏时期进行了推测.结果显示热流体活动在区内形成了大套的硅化地层和大量裂缝、溶洞中的方解石和石英胶结物,并伴随区内第1期天然气成藏,可能发生于海西晚期-印支期;区内第2期油气成藏主要发生于喜山期,以天然气为主.热流体活动不仅促进了海西晚期的天然气成藏,同时也对储层物性的提高和储集空间的保存起到了积极作用.
Gas accumulation has become one of the hot topics nowadays.Through the diagenesis observation, fluid inclusions analysis, carbon and oxygen isotope analysis and laser Raman probe test, 44 samples of Ordovician in Shunnan area, Tarim basin, And the hydrothermal minerals are identified, and possible hot fluid activities and hydrocarbon accumulation period are estimated.The results show that the thermal fluid activities in the area formed a large set of silicified layers and a large number of cracks in the cave Of calcite and quartz cement with the first phase of natural gas accumulation in the area may occur in the late Hercynian-Indosinian period. The second phase of hydrocarbon accumulation mainly occurred in the Himalayan period with natural gas as the main component. The activities not only promoted the accumulation of natural gas in the late Hercynian period, but also played an active role in improving reservoir physical properties and preserving reservoir space.