基于流体包裹体的任丘油田雾迷山组成藏期次确定与古压力恢复

Determination of oil accumulation period and building up of paleopressure of Wumishan formation in Renqiu Oilfield by using fluid inclusion

利用LinkamTHMS600型冷热台和LabRam-010型激光拉曼光谱仪，采用先进的包裹体测试技术及分析方法，对任丘油田雾迷山组地层储层流体包裹体进行了显微荧光、均一温度、冰点、拉曼光谱等分析测试，以确定雾迷山组储层油气充注时间及成藏期次，并利用数据对油气充注时古压力进行恢复。结果表明：该储层流体包裹体主要包括单相烃类包裹体、两相烃类包裹体、含饱和烃盐水包裹体及两相盐水包裹体4种类型；流体包裹体均一温度具有明显的双峰特征，峰值分别为70～90℃和110～120℃，盐度数据也集中在2个区域；沙二段及明化镇组沉积中期是主要成藏期；油气充注时的压力总体高于正常地层压力，但是并未造成异常高压。

For the purpose of ascertaining the time and accumulation period of oil charging in the Wumishan formation, the microfluorometry, homogenization temperature and laser Raman spectroscopy of the fluid inclusions from this formation were tested and analyzed by using Linkam THMS 600 and LabRam-010 laser spectrum analyzer. On the basis of testing data, the paleopressure of the reservoir was builded up. The results show that the fluid inclusions of this area include single-phase and two-phase hydrocarbon inclusions, brine inclusions with highly saturated hydrocarbon and two-phase brine inclusions. The homogenization temperature of the fluid inclusions has two special peaks at 70-90℃ and 110-120℃. The salinity of inclusions also concentrates in two areas which coincided with the homogenization temperature. The sedimentary times of member 2 of Shahejie formation and middle Minghuazhen formation are the main oil accumulation period. The pressure of oil charging period is higher than the normal pressure of reservoir, but the surpressure is not caused.