摘要
在利用共聚焦显微镜和PVTsim软件对鄂尔多斯盆地上古生界储层山西组砂岩中次生包裹体进行模拟计算的基础上,通过建立起利用液态烃包裹体和同期的盐水包裹体的二元一次等容线方程联立求解包裹体捕获温度和压力的方法.结果表明,包裹体的捕获压力220～280Pa,对于均一温度在100℃～110℃范围的盐水包裹体,其最小捕获压力比捕获压力低60～70Pa;包裹体的捕获压力有从南向北逐渐减小的趋势;包裹体的捕获压力远小于深盆气藏形成时的静水压力,这一特征与深盆气藏形成的地质地球化学条件相一致.图3,表7,参9.
There are many problems on investigation of trapping pressure of aqueous inclusions by means of conventional methods. In recent years, The PVTsim has been widely applied to determine trapping pressure of petroleum inclusions in reservoir rocks. In this paper, on the bases of simulating and calculating for the secondary inclusions of the upper paleozoic of Shanxi group of the Ordos basin using confocal laser scanning microscope and PVTsim software, the author present a new method to calculate the trapping pressure and temperature of inclusions by using the secondary petroleum inclusions and aqueous inclusions binary simple isochore equation. The results show that the trapping pressures of the inclusions vary from 220 to 280 Pa, the trapping pressures is higher 60～70 Pa than the min-trapping pressures of the aqueous inclusions whose homogeneoustemperature is from 100 ℃～110 ℃ and there is a decreasing tendency of trapping pressures from south to north direction, and they are much lower than the state water pressures during the period when the inclusions formed. This characteristics is consistent with the pressure abnormity of the deep basin gas trap.3figs.,7tabs.,9refs.
出处
《湘潭矿业学院学报》
2002年第3期22-26,共5页
Journal of Xiangtan Mining Institute
