苏里格气田上古生界储层流体包裹体特征及成藏期次划分

苏里格气田是目前中国天然气探明地质储量最多的大型整装气田，也是未来中国最重要的天然气主产区之一。为确定苏里格气田上古生界天然气藏的天然气充注时间和成藏期次，利用LINKAM THMS600型冷热台和LABHR-VIS LABRAM HR800型显微激光拉曼光谱仪，采用较先进的包裹体测试技术及分析方法，对该气田上古生界储层流体包裹体样品进行了测试分析。结果表明，苏里格气田上古生界储层流体包裹体主要包括富CO₂包裹体、富CH₄包裹体和富高饱和烃包裹体3种类型。流体包裹体均一温度具有明显的双峰特征，两个峰值分别为90~120℃和140~150℃。这表明研究区上古生界天然气充注与成藏期次主要有2期。利用包裹体测试资料，结合埋藏史综合分析表明：早侏罗世晚期—晚侏罗世晚期（距今190~154Ma）和早白垩世（距今137~96Ma）是苏里格气田上古生界天然气藏的主要成藏期。

Characteristics of fluid inclusions and determination of gas accumulation period in the Upper Paleozoic reservoirs of Sulige Gas Field

Being the largest gas field ever discovered in China, Sulige Gas Field will become one of the most important main production areas. For the purpose of ascertaining the time of gas charging and the formation period of gas reservoirs in the Upper Paleozoic of Sulige Gas Field, the samples of fluid inclusions from this field were tested and analyzed using the more advanced testing apparatus and techniques. The results show that the fluid inclusions of this area mainly include hydrocarbon-bearing CO₂ inclusion, CH₄-rich gaseous hydrocarbon inclusion and highly saturated hydrocarbon-rich liquid hydrocarbon inclusion. The homogenization temperature of the fluid conclusion has two special peaks at 90~120℃ and 140~150℃, which shows that there are two main orders and times of gas charging and gas accumulation in the Upper Paleozoic of Sulige Gas Field. The test data of fluid inclusions and the burial history show that two periods from the late stage of Early Jurassic to the late stage of Late Jurassic(190~154Ma bp)and Early Cretaceous(137~96Ma bp)are the main gas accumulation period in the Upper Paleozoic of Sulige Gas Field.