陆相多层砂岩油藏渗透率表征与定向井初期产能预测——以蓬莱19-3油田为例

发布时间：2018-11-14 12:56

【摘要】：基于对蓬莱19-3油田多层砂岩油藏定向井初期产能主要影响因素的研究,提出基于岩相约束的渗透率解释模型,建立了适用于海上多层砂岩油藏的定向井初期产能预测公式。蓬莱19-3油田定向井初期产能主要影响因素为渗透率和含油饱和度。利用蓬莱19-3油田岩心、扫描电镜、铸体薄片、测井和生产动态等资料,综合考虑储集层宏观沉积特征和微观孔隙结构对渗透率的影响,建立了基于岩相约束的多层砂岩油藏渗透率解释新模型。在渗透率校正的基础上,引入电阻增大率表征含油饱和度的影响,修正Vandervlis的定向井产能公式,得到适用于陆相多层砂岩油藏定向合采井初期产能的计算公式。研究结果表明,考虑岩相约束后的渗透率并引入电阻增大率后的产能预测公式计算精度高。
[Abstract]:Based on the study of the main factors affecting the initial productivity of directional wells in multi-layer sandstone reservoirs in Penglai 19-3 Oilfield, a permeability interpretation model based on lithofacies constraints is proposed, and a prediction formula for initial productivity of directional wells suitable for offshore multi-layer sandstone reservoirs is established. Permeability and oil saturation are the main factors affecting initial productivity of directional well in Penglai 19-3 oilfield. Based on the core of Penglai 19-3 oilfield, scanning electron microscope (SEM), casting thin section, logging and production performance, the effects of macroscopic sedimentary characteristics of reservoir and micro-pore structure on permeability are considered synthetically. A new permeability interpretation model for multi-layer sandstone reservoir based on lithofacies constraint is established. On the basis of permeability correction, the effect of oil saturation is represented by resistance increase rate, and Vandervlis's productivity formula for directional wells is revised to obtain the formula for calculating initial productivity of directional combined production wells in multi-layer sandstone reservoirs of continental facies. The results show that the calculation accuracy of the productivity prediction formula after considering the permeability of the lithofacies and introducing the resistance increase rate is high.
【作者单位】：中海石油(中国)有限公司天津分公司渤海石油研究院;中海油研究总院;
【基金】：国家重大科技专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058-001);“海上稠油油田开发模式研究”(2016ZX05025-001)
【分类号】：TE312;TE328

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