摘要
油气藏进入二次、三次开发后,剩余油饱和度的空间分布以及随时间的动态变化对于开发方案调整变得尤为重要.目前,基于测井曲线、测试资料的常规剩余油饱和度评价存在不等时性,即测井、开发和评价时刻不等,导致在某一评价时刻绘制的剩余油饱和度等值线图不能准确反映油水的空间分布特征,不同评价时刻的等值线图对比也不能反映油水的动态变化以及开发效果.将研究目的层划分为未投产未水淹、未投产水淹、在产水淹、在产未水淹4种情况,以地质和工程资料为约束,提出了一种动静态结合的等时剩余油饱和度动态定量评价方法.首先,依据测井资料、开发资料定性判别开发区块中的单井、单层在评价时刻是否水淹、是否在产.其次,根据注水受效、水淹、在产情况,依据测井曲线、产水率与评价时刻的匹配关系选取对应的基于动态资料(产水率)、静态资料(测井曲线)的剩余油饱和度评价方法,绘制目的工区目标层在特定时刻的等时剩余油饱和度分布等值线图.最后,绘制时间推移的等时剩余油饱和度动态变化图,进而分析剩余油饱和度随时间的变化规律,评价开发方案效果.在某断块油藏某层的应用效果表明,该方法呈现出不同时刻剩余油饱和度分布与注水井分布、作业情况吻合得很好,能够描述开发后剩余油的动态变化,评价开发效果.
The distribution and temporal change of remaining oil saturation is important to the adjustment of the development plan for reservoirs in secondary and third development stages.At present,there is a non-isochronism in evaluation of distribution of remaining oil saturation based on well logging and test data,which leads to that we cannot get correct distribution and dynamic change of remaining oil saturation to find out the enrichment region of remaining oil and evaluate the effect of development plan.To solve this problem,this work proposes a new method of dynamic evaluation of isochronous remaining oil saturation in 4 kinds of situations based on the comprehensive interpretation with well logging and production performance under constraints of geology and petroleum engineering.First,we determine water flooding and production at the evaluation moment based on the interpretation of well logging data and production performance.Secondly,we draw the contour plot of isochronous remaining oil saturation at the same moment by the evaluation of remaining oil saturation with the comprehensive interpretation of well logging,production performance and effect analysis of water injection.Finally,we describe the dynamic change of remaining oil saturation and evaluate the effect of development plan through the comparison of time lapse contour plot of isochronous remaining oil saturation.The application to a fault-block oil reservoir shows that the distribution and dynamic change of isochronous remaining oil saturation evaluated by this method coincides with the distribution of injection wells and production histories.
作者
韩学辉
杜阳阳
姜涛
张浩
胡张明
唐建红
王鹏
罗兴平
柴立学
王洪亮
戴诗华
HAN XueHui;DU YangYang;JIANG Tao;ZHANG Hao;HU ZhangMing;TANG JianHong;WANG Peng;LUO XingPing;CHAI LiXue;WANG HongLiang;DAI ShiHua(School of Geoscience,China University of Petroleum(East China),Qingdao 266555,China;Shengli College China University of Petroleum,Dongying 257061,China;Xinjiang Branch of China Petroleum Logging Company Limited,Karamay 834000,China;Research Institute of Petroleum Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China;Geological Research Institute of CNPC Xibu Drilling Engineering Company Limited,Karamay 834000,China;Collage of Geoscience,Yangtze University,Wuhan 430100,China;Karamay OnCores Energy Technology Company Limited,Karamay 834001,China)
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2021年第7期2515-2529,共15页
Chinese Journal of Geophysics
基金
国家科技重大专项(2017ZX05009001)
国家自然科学基金(U1562108)联合资助.
关键词
等时性
剩余油饱和度
动态评价
测井
生产动态
Isochronism
Remaining oil saturation
Dynamic evaluation
Well logging
Production performance
