A New W ay to Proofread the O il Saturation of the Sealed Coring by Using Ordinary Pressure
单位
(江苏油田分公司地质科学研究院)
Organization
Geologic Science Research Institute of Jiangsu O ilfie ld Company, SINOPEC, Yangzhou 225009, China
摘要
常压密闭取心在起钻过程中, 由于降压脱气作用, 分析含油饱和度与实际值有所
偏差。对于纯油层, 岩心中没有可动水, 可以用( 1- Sw i )来校正含油饱和度, 但对于开发中后
期的油田而言, 由于地层中存在可动水, 油水均有一定损失, 再用( 1- Sw i )来校正含油饱和度,
就会造成含油饱和度过大, 需要寻找一种新的方法进行校正。
Abstract
In the pro cess of the sealed cor ing by using ord inary pressure, som e o il saturation erro rs occur be tw een ana ly tic and true va lue as the pressure lo st and gas o f.f Because the rock of net reservo ir doesn t’ conta in ac tive wa ter, 1-Sw i can be used to proo fread the o il saturation. As the ac tive w ater ex ists in the stra tum in the o ilfie ld wh ich is explo ited in production ta i,l both the active o il and ac tive w ater have som e losses. At this tim e, w e could no t use 1-Sw i to proo fread the oil saturation. W e w ill g et b igger o il satura tion if we used it. So w e have to search a new way to proofread the o il satura tion.
关键词：
常压;密闭取心;降压脱气;含油饱和度;
Keywords:
Ord inary pressure, Sea led cor ing, Pressure lost and g as of,f O il satura tion;
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