准噶尔盆地克拉美丽气田油气源特征及成藏分析

通过对新疆准噶尔盆地克拉美丽气田烃源岩特征、油气来源以及天然气成藏过程的分析，并利用烃源岩分析技术、油气源对比技术和成藏综合分析技术等方法解释了克拉美丽气田的主力气源岩，初步明确了气田的成藏过程和形成主控因素。研究认为克拉美丽气田主力气源岩为石炭系烃源岩，油气成藏以近源为主，具有“早期聚集、晚期保存”的成藏过程，油气成藏经历了海西晚期、印支晚期和燕山中期的多期油气充注，不同地区油气成藏具有时序性。石炭系烃源岩展布、火山岩体展布和二叠系乌尔禾组区域盖层是克拉美丽大气田成藏的主控因素。

Features of source rocks and hydrocarbon pooling in the Kelameili gasfield,the Junggar Basin

In this paper，an analysis is made on the source rock features，source of hydrocarbons and gas pooling process in the Kelameili gas field of the Junggar Basin in Xinjiang. Using techniques such as source rock analysis，hydrocarbonˉsource correlation and comprehensive analysis of hydrocarbon pooling，we describe the main source rocks of the Kelameili gas field and preliminarily determine the gas accumulation process and its main controlling factors. According to the study，it is believed that:1）the main source rock of the Kelameili gas field is the Carˉboniferous source rock;2）hydrocarbons mainly accumulate in reservoirs near the source rocks and the pooling process is characterized by“early accumulation and late preservation”;3）multiˉstages of charging happened in the Late Hercynian，Late Indonisian and MiddleYanshanian;4）hydrocarbon pooling in different areas has a temporal sequence. The main controlling factors for gas pooling in the Kelameili gas field are the distribution of Carboniferous source rocks and volcanic rocks as well as the regional seals in the Permian Urho Formation.