【作者】 陈志勇；

【导师】 贾承造； 夏斌； 李启明；

【作者基本信息】 中国科学院研究生院（广州地球化学研究所） ， 构造地质学， 2007， 博士

【摘要】 轮南地区是塔里木盆地最早获得油气突破的地区之一，也是油气相态分布最为复杂的地区。前人分别尝试从不同角度研究了各种油气相态分布的成因机理，但轮南油气田群具有多烃源灶、多期成藏的特点，受多期构造改造使油气分布异常复杂，仅从单一角度或使用单一方法来解释油气分布相态规律及成因往往会与实际地质情况不符，若从多种因素解释，又常造成解释结果多样化。因此，作者认为必须首先厘清油气相态分布的主控因素，并参考其他次要影响因素综合解释油气相态分布规律和成因机理。本研究作者确定了油气相态的三大主控因素，即烃源岩、成藏期次和构造活动。以剖析三大主控因素为主线，进行地质构造解析，并通过原油成分分析、流体包裹体类型、均一温度和成分，以及储层沥青反射率等地球化学方法的研究，力求结论既符合地质实际又能够得到有力的地球化学的证明。本论文取得的主要结论和创新有：1、首次对轮南油气相态系统分析成图，依据地质、地球化学综合分析，提出轮南成藏两期划分方案，认为海西晚期成藏奠定了轮南油气资源的规模，喜山晚期成藏丰富了轮南油气相态；2、提出控制轮南相态分布的三大因素，即源岩因素控制了油气相态的性质，成藏因素控制了油气相态的分布，构造因素最终改造了油气相态；3、提出轮南相态成因模式和成藏模式，即平面上差异聚集为主，垂向上以运移分馏为主，经综合分析油气成藏过程和相态分布规律，提出了新的勘探领域。更多还原

【Abstract】 Lunnan area is one of the earliest places where petroleum exploration obtained breaks in Tarim Basin. And it is the area, which has the most complicated distribution of petroleum phase states. The origin mechanism of various distributions of petroleum phase state has been studied by many researchers from different aspects. But because Lunnan oil field has characteristics of multi-hydrocarbon source kitchens, mutiple stages of accumulation and several structure movement’s reconstruction, if the distribution of petroleum phase state is explained by using single method or aspect, the explanation will be not symbol with actual geological situation. And if it is explained by many factors, the conclusion often will be diversificate.So, the author thought the main controlling factors of the petroleum phase state distribution need to be clear firstly, and all of other factors should be considered simultaneously. Three main controlling factors, including source rock, petroleum accumulation and structure movement, have been determined. Looking analsis of three main controlling factors as the master line, geological structure, oil component, type, homogenization temperatures and component of fluid inclusions and vitrinite reflectance of bitumen in reservoir were analyzed. All analysis mentioned above makes the result symbol with actual geological situation and having powerful proof of geo-chemistry. Following are main innovative achievements and conclusions:1) The author maps the petroleum phase state in the Lunnan area at first time. Based on the geological and geochemistry analysis, two stages of petroleum accumulation have been proposed. During the later Hercynian, the petroleum accumulation scale was determinated and the petroleum phase state was enriched during the later Himalayan.2) Three main controlling factors of petroleum phase state have been proposed. The characteristics of petroleum phase state were controlled by the source rock, the distribution was controlled by the petroleum accumulation factor and the structure changed the petroleum phase state at last.3) The origin model of petroleum phase and petroleum accumulation model,which has characteristics of differential accumulation mainly in flat and migration fractionation mainly in vertical, has been proposed in Lunnan oil and gas field. Through generalized analysis of pooling process and phase state distribution rule ofoil and gas, new exploration area has been proposed.更多还原