常压密闭取心含油饱和度校正新方法  

A New Way to Proofread the Oil Saturation of the Sealed Coring by Using Ordinary Pressure

作　　者：孔祥礼[1] 玄中海[1] 

机构地区：[1]江苏油田分公司地质科学研究院

出　　处：《断块油气田》2006年第1期20-22,28,共4页Fault-Block Oil & Gas Field

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。In the process of the sealed coring by using ordinary pressure,some oil saturation errors occur between analytic and true value as the pressure lost and gas off.Because the rock of net reservoir doesn't contain active water,1-S_(wi) can be used to proofread the oil saturation.As the active water exists in the stratum in the oilfield which is exploited in production tail,both the active oil and active water have some losses.At this time,we could not use 1-S_(wi) to proofread the oil saturation.We will get bigger oil saturation if we used it.So we have to search a new way to proofread the oil saturation.

关 键 词：常压 密闭取心 降压脱气 含油饱和度 

分 类 号：TE311[石油与天然气工程—油气田开发工程] TE244