稠油油藏试油测试资料分析

Analysis on oil testing data for heavy oil reservoirs

为增强稠油流动性,提高稠油井采收率,有效开发稠油油藏储层,通过射孔测试联作工艺技术,对压力数据及温度数据进行分析比对,得出不同黏度下井底压力恢复情况和不同温度下井内稠油流动情况。经过对稠油油藏试井评价分析发现,稠油油藏独有的压力恢复曲线表现为台阶式恢复方式、试井双对数曲线表现为交叉现象,引起这种现象的主要原因与原油黏度有关。通过优化射孔工艺参数,采用高穿深射孔弹、多相位角,以及高孔密大孔径射孔枪,有效改善稠油井产能,增加探测半径,改善井筒附近稠油流动形态。只有将原油黏度降到可以流动状态,才能取得成功的测试资料。优化后的射孔工艺参数能够有效提高稠油流动性,为稠油油藏有效开发提供一定技术支持。

In order to effectively develop heavy oil reservoirs by enhancing the fluidity of heavy oil for a higher recovery,the pressure and temperature data were comparatively analyzed using the perforating+testing technology,and the recovery of bottomhole pressure under different oil viscosities and the flow of heavy oil at different temperatures were obtained.After analyzing the results of well testing in heavy oil reservoir,it is found that the unique pressure recovery curve of heavy oil reservoirs represents a stepped pattern,and the log-log well testing curve represents a cross phenomenon,which are presumably related to the viscosity of crude oil.By optimizing the perforating parameters,choosing deep-penetration perforating charges and multiple phase angles,and adopting perforating guns with dense and large perforations,the productivity of heavy oil wells can be effectively improved,the detection radius can be increased,and the flow pattern of heavy oil near the wellbore can be improved.Successful testing data can only be obtained by reducing the viscosity of crude oil to a flowable state.The optimized perforating parameters can effectively improve the fluidity of heavy oil,which will provide certain technical support for the effective development of heavy oil reservoirs.