密闭取心含油饱和度校正方法  

Sealed Coring Oil Saturation Correction Method

作　　者：赵书铮 徐锦绣 汪瑞宏 郑炀 齐奕 ZHAO Shuzheng;XU Jinxiu;WANG Ruihong;ZHENG Yang;QI Yi(Bohai Oil Research Institute of Tianjin Branch of CNOOC Ltd., Tianjin 300459, China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459

出　　处：《测井技术》2020年第2期178-181,共4页Well Logging Technology

基　　金：十三五重大专项示范工程“海上稠油高效开发示范工程”(2016ZX05058);渤海油田加密调整及提高采收率油藏工程技术示范(2016ZX05058-001)。

摘　　要：在调整井中密闭取心数据是研究剩余油分布最准确、直接的资料,新鲜岩心剩余油饱和度分析对于油田水驱开发效果评价、尤其是剩余油潜力和分布研究非常重要。密闭取心过程中由于不能保持油藏条件,使得实验室内岩心油、水饱和度分析结果与地层条件下的真实值有较大误差,必须进行校正。结合SZ油田实际情况,建立密闭取心剩余油饱和度校正方法,通过分析密闭取心饱和度的主要影响因素,对水淹级别的饱和度分布区间进行分类统计,给出一套在地层条件校正前提下的基于统计回归的饱和度解析校正方法,经验证效果良好。Cores taken under sealing conditions in adjustment wells can provide the most accurate and direct data for studying remaining oil distribution.And the analysis of residual oil saturation in fresh cores is very important for the evaluation of water flooding development,especially the study of remaining oil potential and distribution.However,in the sealed coring process,reservoir conditions cannot be maintained,so that oil and water saturation got in laboratory may deviate from underground values,and they must be corrected.Taking SZ oilfield as a case,this paper establishes a method for correcting the residual oil saturation calculated from sealed cores.First main influencing factors are analyzed,then the saturation distribution is counted and classified by considering waterflooding levels,and finally an analytical saturation correction method is proposed based on statistical regression under the premise of formation condition correction.The method has been proved very effect in field.

关 键 词：密闭取心 饱和度校正 地层条件校正 统计回归 分段区间 

分 类 号：P631.84[天文地球—地质矿产勘探]