复杂岩性油藏精细描述研究进展

Review on Fine Description of Complex Lithologic Reservoir

复杂岩性油藏作为目前油田开发中十分重要的油藏类型之一,其精细描述一直受到研究者的关注和重视。为了给有效开发和调整部署提供依据,系统梳理了目前复杂岩性油藏精细描述中存在的主要问题、主要研究内容和技术发展方向,并总结复杂岩性油藏研究进展。从国内复杂岩性油藏精细描述研究现状入手,总结了该项研究存在的6项主要问题,主要包括岩性岩相识别与分类、储层地质成因分析难度大、地层精细划分与对比具有特殊性、裂缝表征难度很大、测井精细二次解释精度低、地质建模井间储层预测准确率低等。基于文献调研和综述,结合科研实践,认为复杂岩性油藏精细描述核心内容包括岩性岩相识别与分类、储层地质成因机制分析、储集空间识别和描述、储层物性精细测井解释和储层地质建模等5个方面。在此基础上,指出了该项研究的发展趋势,主要包括地层精细划分与对比、微观孔隙结构表征、储层裂缝表征、储层综合定量评价和流体识别等。

Complex lithologic reservoir is one of the most important reservoir types in oilfield development, and its fine description is paid much attention to by researchers. In order to provide the basis for effective development and deployment, the main problems, research contents and technical development direction existing in fine description of complex lithologic reservoir are sorted out, and the review on complex lithologic reservoir is summarized. Based on the research status of fine description of complex lithologic reservoir in China, 6 main problems are summarized. The problems mainly includes lithofacies identification and classification, great difficulty in reservoir geological genesis analysis, particularity in fine stratigraphic division and correlation, great difficulty in fracture characterization, low accuracy in fine secondary interpretation and low accuracy in interwell reservoir prediction of geological modeling. Based on literature research and review, combined with scientific practice, it is concluded that the core contents of fine description of complex lithology reservoir include 5 aspects, such as lithofacies identification and classification, analysis of reservoir geological genesis mechanism, identification and description of reservoir space, fine logging interpretation of reservoir physical properties, and geological modeling of reservoirs. On this basis, 5 development trends are pointed out, including fine stratigraphic division and correlation, characterization of microscopic pore structure, characterization of reservoir fractures, comprehensive quantitative evaluation of reservoirs, and fluid identification.