基于弛豫-扩散的二维核磁共振流体识别方法  

Fluid identification method based on 2D diffusion-relaxation nuclear magnetic resonance(NMR)

作　　者：胡法龙[1,2] 周灿灿[1,2] 李潮流[1,2] 徐红军[1,2] 周凤鸣[3] 司兆伟[3] 

机构地区：[1]中国石油勘探开发研究院 [2]中国石油天然气股份有限公司测井重点实验室 [3]中国石油冀东油田公司

出　　处：《石油勘探与开发》2012年第5期552-558,共7页Petroleum Exploration and Development

基　　金：中国石油勘探开发研究院院级项目"二维核磁共振测井流体识别新技术研究"(115201C90001)

摘　　要：基于MRIL-Prime核磁共振测井仪器现有采集模式,将不同采集模式测井信息进行组合后获得二维核磁共振信号,利用多回波串联合反演技术获得孔隙流体弛豫-扩散的二维核磁共振信息分布,用以识别复杂储集层流体性质。相对一维核磁共振测井,该流体性质识别方法增加了扩散域流体信息,可以在二维空间内将油、气、水信号分离,提高核磁共振测井流体性质识别能力。利用MRIL-Prime仪器对南堡凹陷A井油层和B井水层进行多回波间隔的二维核磁共振测井试验,解释结果与试油结果相吻合,说明二维核磁共振测井在轻质油识别和大孔隙储集层流体识别方面相对一维核磁共振测井技术有明显优势。Based on current acquisition modes of MRIL-Prime NMR logging tool, 2D NMR signals could be obtained by the combination of logging data from different modes, then the fluid properties in complicated reservoirs could be distinguished by 2D diffusion-relaxation NMR logging data distribution of pore fluids, generated by multi-echotrain joint inversion. In comparison with 1D NMR logging, this method could increase fluid information in diffusion regime, separate oil, gas and water signals in 2D space and enhance the identification capacity of fluid properties from NMR logging. The 2D NMR logging in the multi-echowave interval was applied in the oil pays in Well A and the water layers in Well B in the Nanpu Sag by MRIL-Prime tool, and the interpretation matches the well testing result. It indicates that 2D NMR logging has advantages on the identification of light oil, and fluids in macropore reservoirs than 1D NMR logging.

关 键 词：二维核磁共振测井 采集模式 多回波串联合反演 扩散系数 

分 类 号：P631.811[天文地球—地质矿产勘探]