摘要
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 fluid saturation values in the laboratory usually deviate from the real fluid saturation values in the reservoir. The factors influencing 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 flooding condition of reservoir and to effectively improve oilfield development.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2009年第2期82-85,90,共5页
Oil Drilling & Production Technology
基金
中石化集团公司项目"中高渗砂岩油藏水驱波及规律与驱油效率研究"(编号:P07070)部分研究成果
关键词
密闭取心
含水饱和度
降压脱气
压实作用
测试方法
物理模拟
水淹状况
sealed coring
depressurizing and degassing
compaction
water saturation
physical simulation
water flooding condition
