精细油藏描述中剩余油研究进展

Advances in Remaining Oil Researches of Fine Reservoir Description

剩余油表征一直是油田开发中后期研究者关注的重点内容。通过文献调研并结合自身科研实践,总结剩余油研究主要内容包括剩余油分类和发育规律刻画、剩余油成因和分布模式、多种方法描述剩余油、相关学科成果在剩余油研究中的应用、井间剩余油预测、三次采油阶段剩余油描述等。剩余油研究方法主要包括开发地质学、岩心观察和分析测试、水淹层测井解释、四维地震、各种数理统计学、油藏数值模拟、动态监测分析、油藏工程、试井解释方法等,这些方法各有优缺点。剩余油研究主要问题包括9方面:剩余油成因分析难度大、剩余油研究方法各有优缺点、改进剩余油研究方法难度大、井间剩余油预测问题多、相关学科成果应用至剩余油研究中不成熟、三次采油阶段剩余油研究还在探索、复杂岩性油藏剩余油研究问题多、剩余油研究定量化水平不高、微观剩余油研究比较薄弱等。剩余油研究发展趋势包括9方面:加大剩余油成因研究力度、改进剩余油研究方法、明确数理统计分析研究剩余油参数的地球物理意义、提高剩余油井间预测精度、将相关学科成果充分应用至剩余油研究中、探索建立三次采油阶段剩余油研究方法技术体系、加大非常规油藏剩余油研究力度、提高剩余油研究定量化水平、加强微观剩余油研究力度等。

The remaining oil characterization has been the focus of research in the middle and late stage of oilfield development.Through the references research and in combination with its own scientific research practice,summarized the main contents of remaining oil characterization.It include classification of residual oil and residual oil studies development regularities depicting,residual oil formation and distribution pattern,a variety of methods to describe remaining oil,results in remaining oil research,inter-well remaining oil prediction,the application of tertiary oil recovery phase residual oil description,etc.Remaining oil research methods mainly include the development of geology,core observation and analysis of the test,logging interpretation of water-out reservoirs,4 d seismic,a variety of mathematical statistics,reservoir numerical simulation,the dynamic monitoring and analysis,reservoir engineering,well test interpretation method,etc,and each have advantages and disadvantages of these methods.Remaining oil research mainly include nine aspects:residual oil genesis analysis is difficult,each have advantages and disadvantages of remaining oil research method,improve the method of remaining oil research is difficult,inter-well remaining oil prediction problem,more related discipline results applied to remaining oil research is not mature,the tertiary oil recovery stage of remaining oil research is exploring,complex lithologic reservoir remaining oil research question more quantitative level is not high,the remaining oil research,microscopic remaining oil research is weak,and so on.Remaining oil research trends including 9 aspects:increasing residual genetic research,improve the method of remaining oil research,clear mathematical statistical analysis research remaining oil geophysical significance of parameter,improve the prediction accuracy between residual oil Wells,the related academic achievements fully applied to the remaining oil in the study,the exploring stage of tertiary oil recovery method of remaining oil research technology system,increase the intensity of unconventional reservoir remaining oil research,improve the level of remaining oil research quantified,strengthen the microscopic remaining oil research,etc.