基于核磁谱几何特征的碳酸盐岩储层渗透率评价方法研究  

Study on Permeability Evaluation Method of Carbonate Reservoir Based on NMR Geometric Characteristics

作　　者：王文文 林龙生[2] WANG Wenwen;LIN Longsheng(China United Coalbed Methane Co.,Ltd.,Beijing 100016,China;Oilfield Technology Department,China Oilfield Services Limited,Langfang Hebei 065201,China)

机构地区：[1]中联煤层气有限责任公司,北京100016 [2]中海油田服务股份有限公司油田技术事业部,河北廊坊065201

出　　处：《海洋石油》2021年第2期69-73,共5页Offshore Oil

摘　　要：渗透率是评价储层中流体流动能力的重要参数。核磁共振测井是准确获取渗透率的主要技术,但受孔隙结构变化影响,传统核磁渗透率模型不适用于碳酸盐岩地层渗透率的评价。通过引入T2谱几何特征参数,建立了碳酸盐岩地层的渗透率评价模型。应用该模型对鄂尔多斯盆地气藏中的奥陶系碳酸盐岩层进行评价。研究发现,与原有方法相比,几何法能够更准确获取地层渗透率。Permeability is an important parameter to evaluate the fluid flow ability in reservoirs.Nuclear magnetic resonance(NMR)logging is the main technology to obtain permeability accurately.However,due to the change of pore structure,the traditional NMR permeability model is not suitable for the evaluation of carbonate formation permeability.The permeability evaluation model of carbonate formation is established by introducing geometric characteristic parameters of T2 spectrum.The model is applied to evaluate the Ordovician carbonate rocks in gas reservoirs in Ordos Basin.It is found that the geometric method can obtain the formation permeability more accurately than the original method.

关 键 词：渗透率 几何特征 碳酸盐岩 

分 类 号：P631.8[天文地球—地质矿产勘探]