基于物理模拟实验的密闭取心井油水饱和度校正

Oil and water saturation correction for sealed coring wells based on physical simulation experiments

刘丽

LIU Li

胜利油田公司地质科学研究院，山东东营　257015

Geological Scientif ic Research institute Shengli oilf ield Comp any of SinoPeC Dongying 257015 China

密闭取心井岩心流体饱和度分析是评价储层水淹状况的重要手段之一，而室内岩心常规分析测得的密闭取心井油水饱和度常常偏离地层孔隙中的真实油水饱和度。分析了影响室内岩心含水饱和度测量值的相关因素，以胜利油区2 口密闭取心井为例，通过室内实验模拟降压脱气过程，重点研究了降压脱气对含水饱和度的影响规律。综合考虑降压脱气、孔隙压实和测试方法造成的含水饱和度损失进行实测含水饱和度校正，使其更接近实际地层中的真实含水饱和度。利用校正后的油水饱和度资料，有助于准确地判断油层水淹状况，有效地提高油气开发水平。

Fluid saturation analysis of core samples for sealed coring wells is one of important methods which are used to evaluate water out behavior in the reservoir, but the measured luid saturation values in the laboratory usually deviate from the real luid saturation values in the reservoir. The factors inluencing the measured results of oil and water saturation were reviewed. Taking two sealed coring inspection wells as examples, the process of depressurizing and degassing was simulated and the effect of depressurizing and degassing on water saturation was mainly studied. Considering comprehensively the water saturation loss because of degassing, compaction and test method, the measured water saturation value was corrected so that it is more close to the real water saturation in the reservoir. The oil and water saturation data after correction can be applied to accurately evaluate water looding condition of reservoir and to effectively improve oilield development.