塔中顺南缓坡奥陶系热流体活动与天然气成藏的耦合关系
The Coupling Relationship betweenn Hydrothermal Fluids and the Hydrocarbon Gas Accumulation in Ordovician of Shunnan Gentle Slope, Northern Slope of Tazhong Uplift

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.
Natural gas allumulation has become one of the hot spots in the current research. In this paper, 44 samples of the Ordovician in Shunnan area have been employed to make diagenetic observation, fluid inclusions measurement, carbon and oxygen isotope measurement and Raman spectrum, aiming to recognize the hydrothermal fluid flows and speculate the time of the hydrothermal fluid flows and the accumulation of the oil and gas. The silicified limestone and the calcite, quartz cement in the cracks and caves are the products of hydrothermal fluids, accompanied with the first stage of gas accumulation during late Hercynian Indosinian. The second stage of gas accumulation produced during Himalayan. Hydrothermal activities not only promote the gas accumulation during Hercynian, but also play a positive role in improve and preserve the reservoir spaces