常压密闭取芯含油饱和度校正新方法  

A NEW WAY TO PROOFREAD OIL SATURATION THROUGH SEALED CORING UNDER USUAL PRESSURE

作　　者：孔祥礼[1] 

机构地区：[1]江苏油田分公司地质科学研究院,江苏扬州225009

出　　处：《安徽地质》2006年第1期40-46,共7页Geology of Anhui

摘　　要：常压密闭取心在起钻过程中,由于降压脱气作用,使得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-Swi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-Swi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 under ordinary pressure, we found some error in oil saturation between the analytic and the true due to drop in pressure and release of gas. We can use 1-Swi to proofread the oil saturation for pure reservoir because there is no active water in it. For the oilfield at the middle-late development stage, there is active water in stratum and also loss of some oil and water, 1-Swi is no longer applicable to proofreading of oil saturation, otherwise, the result will be over high and a new way is needed.

关 键 词：常压 密闭取心 降压脱气 含油饱和度 

分 类 号：TE122[石油与天然气工程—油气勘探]