按照剩余油分布尺度,可以将剩余油分为宏观剩余油和微观剩余油两大类.剩余油类型及其分布规律是油田后期开发调整的基础,对改善注水效果,提高油田采收率具有重要意义.综合沉积微相法、动态分析法、岩心分析法、数值模拟法等研究方法,对大庆长垣外围油田的剩余油类型、形成原因、分布规律等进行了研究,揭示了沉积微相和井网适应性,井网与裂缝的匹配关系和井网对砂体的控制程度分别是影响中低渗透油田和低、特低渗透油田剩余油分布的主要因素.根据影响剩余油分布的主控因素,对不同类型的剩余油挖潜提供了有效措施,指导了油田的开发调整和综合治理.%According to the distribution scale, the remained oil can be classified into two types: macroscopic remained oil and microscopic remained oil. The types and distribution laws are the basis of development adjustment in late period of oilfield development, and have great significance for improving effect of water injection and enhancing recovery factor of the oilfield. In this paper, the types, genesis and distribution laws of the remained oil in the peripheral oilfields of Daqing Placanticline have been investigated by the comprehensive application of the following research methods, such as sedimentary microfacies method, dynamic analysis method and numerical simulation method. It reveals that the adaptability of sedimentary microfacies to well patterns, the matching relationship of well patten and fractures and the control degree of well patterns on sand body are respectively the main factors influencing the distribution of remained oil in medium-low permeability oilfields, low permeability oilfields and ultra-low permeability oilfields. According to the main controlling factors, the effective treatments for the potential tapping of different types of remained oil have been proposed, which has effectively guided the development adjustment and comprehensive regulation of oilfields.
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